diff options
Diffstat (limited to 'binutils-2.25/bfd/elf64-alpha.c')
| -rw-r--r-- | binutils-2.25/bfd/elf64-alpha.c | 5549 |
1 files changed, 5549 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf64-alpha.c b/binutils-2.25/bfd/elf64-alpha.c new file mode 100644 index 00000000..289164fd --- /dev/null +++ b/binutils-2.25/bfd/elf64-alpha.c @@ -0,0 +1,5549 @@ +/* Alpha specific support for 64-bit ELF + Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, + 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 + Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@tamu.edu>. + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + + +/* We need a published ABI spec for this. Until one comes out, don't + assume this'll remain unchanged forever. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" +#include "elf-bfd.h" + +#include "elf/alpha.h" + +#define ALPHAECOFF + +#define NO_COFF_RELOCS +#define NO_COFF_SYMBOLS +#define NO_COFF_LINENOS + +/* Get the ECOFF swapping routines. Needed for the debug information. */ +#include "coff/internal.h" +#include "coff/sym.h" +#include "coff/symconst.h" +#include "coff/ecoff.h" +#include "coff/alpha.h" +#include "aout/ar.h" +#include "libcoff.h" +#include "libecoff.h" +#define ECOFF_64 +#include "ecoffswap.h" + + +/* Instruction data for plt generation and relaxation. */ + +#define OP_LDA 0x08 +#define OP_LDAH 0x09 +#define OP_LDQ 0x29 +#define OP_BR 0x30 +#define OP_BSR 0x34 + +#define INSN_LDA (OP_LDA << 26) +#define INSN_LDAH (OP_LDAH << 26) +#define INSN_LDQ (OP_LDQ << 26) +#define INSN_BR (OP_BR << 26) + +#define INSN_ADDQ 0x40000400 +#define INSN_RDUNIQ 0x0000009e +#define INSN_SUBQ 0x40000520 +#define INSN_S4SUBQ 0x40000560 +#define INSN_UNOP 0x2ffe0000 + +#define INSN_JSR 0x68004000 +#define INSN_JMP 0x68000000 +#define INSN_JSR_MASK 0xfc00c000 + +#define INSN_A(I,A) (I | (A << 21)) +#define INSN_AB(I,A,B) (I | (A << 21) | (B << 16)) +#define INSN_ABC(I,A,B,C) (I | (A << 21) | (B << 16) | C) +#define INSN_ABO(I,A,B,O) (I | (A << 21) | (B << 16) | ((O) & 0xffff)) +#define INSN_AD(I,A,D) (I | (A << 21) | (((D) >> 2) & 0x1fffff)) + +/* PLT/GOT Stuff */ + +/* Set by ld emulation. Putting this into the link_info or hash structure + is simply working too hard. */ +#ifdef USE_SECUREPLT +bfd_boolean elf64_alpha_use_secureplt = TRUE; +#else +bfd_boolean elf64_alpha_use_secureplt = FALSE; +#endif + +#define OLD_PLT_HEADER_SIZE 32 +#define OLD_PLT_ENTRY_SIZE 12 +#define NEW_PLT_HEADER_SIZE 36 +#define NEW_PLT_ENTRY_SIZE 4 + +#define PLT_HEADER_SIZE \ + (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE) +#define PLT_ENTRY_SIZE \ + (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE) + +#define MAX_GOT_SIZE (64*1024) + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so" + + +/* Used to implement multiple .got subsections. */ +struct alpha_elf_got_entry +{ + struct alpha_elf_got_entry *next; + + /* Which .got subsection? */ + bfd *gotobj; + + /* The addend in effect for this entry. */ + bfd_vma addend; + + /* The .got offset for this entry. */ + int got_offset; + + /* The .plt offset for this entry. */ + int plt_offset; + + /* How many references to this entry? */ + int use_count; + + /* The relocation type of this entry. */ + unsigned char reloc_type; + + /* How a LITERAL is used. */ + unsigned char flags; + + /* Have we initialized the dynamic relocation for this entry? */ + unsigned char reloc_done; + + /* Have we adjusted this entry for SEC_MERGE? */ + unsigned char reloc_xlated; +}; + +struct alpha_elf_reloc_entry +{ + struct alpha_elf_reloc_entry *next; + + /* Which .reloc section? */ + asection *srel; + + /* What kind of relocation? */ + unsigned int rtype; + + /* Is this against read-only section? */ + unsigned int reltext : 1; + + /* How many did we find? */ + unsigned long count; +}; + +struct alpha_elf_link_hash_entry +{ + struct elf_link_hash_entry root; + + /* External symbol information. */ + EXTR esym; + + /* Cumulative flags for all the .got entries. */ + int flags; + + /* Contexts in which a literal was referenced. */ +#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01 +#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02 +#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04 +#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08 +#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10 +#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20 +#define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40 +#define ALPHA_ELF_LINK_HASH_LU_PLT 0x38 +#define ALPHA_ELF_LINK_HASH_TLS_IE 0x80 + + /* Used to implement multiple .got subsections. */ + struct alpha_elf_got_entry *got_entries; + + /* Used to count non-got, non-plt relocations for delayed sizing + of relocation sections. */ + struct alpha_elf_reloc_entry *reloc_entries; +}; + +/* Alpha ELF linker hash table. */ + +struct alpha_elf_link_hash_table +{ + struct elf_link_hash_table root; + + /* The head of a list of .got subsections linked through + alpha_elf_tdata(abfd)->got_link_next. */ + bfd *got_list; + + /* The most recent relax pass that we've seen. The GOTs + should be regenerated if this doesn't match. */ + int relax_trip; +}; + +/* Look up an entry in a Alpha ELF linker hash table. */ + +#define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \ + ((struct alpha_elf_link_hash_entry *) \ + elf_link_hash_lookup (&(table)->root, (string), (create), \ + (copy), (follow))) + +/* Traverse a Alpha ELF linker hash table. */ + +#define alpha_elf_link_hash_traverse(table, func, info) \ + (elf_link_hash_traverse \ + (&(table)->root, \ + (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ + (info))) + +/* Get the Alpha ELF linker hash table from a link_info structure. */ + +#define alpha_elf_hash_table(p) \ + (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ + == ALPHA_ELF_DATA ? ((struct alpha_elf_link_hash_table *) ((p)->hash)) : NULL) + +/* Get the object's symbols as our own entry type. */ + +#define alpha_elf_sym_hashes(abfd) \ + ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd)) + +/* Should we do dynamic things to this symbol? This differs from the + generic version in that we never need to consider function pointer + equality wrt PLT entries -- we don't create a PLT entry if a symbol's + address is ever taken. */ + +static inline bfd_boolean +alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, + struct bfd_link_info *info) +{ + return _bfd_elf_dynamic_symbol_p (h, info, 0); +} + +/* Create an entry in a Alpha ELF linker hash table. */ + +static struct bfd_hash_entry * +elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + struct alpha_elf_link_hash_entry *ret = + (struct alpha_elf_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct alpha_elf_link_hash_entry *) NULL) + ret = ((struct alpha_elf_link_hash_entry *) + bfd_hash_allocate (table, + sizeof (struct alpha_elf_link_hash_entry))); + if (ret == (struct alpha_elf_link_hash_entry *) NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct alpha_elf_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != (struct alpha_elf_link_hash_entry *) NULL) + { + /* Set local fields. */ + memset (&ret->esym, 0, sizeof (EXTR)); + /* We use -2 as a marker to indicate that the information has + not been set. -1 means there is no associated ifd. */ + ret->esym.ifd = -2; + ret->flags = 0; + ret->got_entries = NULL; + ret->reloc_entries = NULL; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Create a Alpha ELF linker hash table. */ + +static struct bfd_link_hash_table * +elf64_alpha_bfd_link_hash_table_create (bfd *abfd) +{ + struct alpha_elf_link_hash_table *ret; + bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table); + + ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt); + if (ret == (struct alpha_elf_link_hash_table *) NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, + elf64_alpha_link_hash_newfunc, + sizeof (struct alpha_elf_link_hash_entry), + ALPHA_ELF_DATA)) + { + free (ret); + return NULL; + } + + return &ret->root.root; +} + +/* Alpha ELF follows MIPS ELF in using a special find_nearest_line + routine in order to handle the ECOFF debugging information. */ + +struct alpha_elf_find_line +{ + struct ecoff_debug_info d; + struct ecoff_find_line i; +}; + +/* We have some private fields hanging off of the elf_tdata structure. */ + +struct alpha_elf_obj_tdata +{ + struct elf_obj_tdata root; + + /* For every input file, these are the got entries for that object's + local symbols. */ + struct alpha_elf_got_entry ** local_got_entries; + + /* For every input file, this is the object that owns the got that + this input file uses. */ + bfd *gotobj; + + /* For every got, this is a linked list through the objects using this got */ + bfd *in_got_link_next; + + /* For every got, this is a link to the next got subsegment. */ + bfd *got_link_next; + + /* For every got, this is the section. */ + asection *got; + + /* For every got, this is it's total number of words. */ + int total_got_size; + + /* For every got, this is the sum of the number of words required + to hold all of the member object's local got. */ + int local_got_size; + + /* Used by elf64_alpha_find_nearest_line entry point. */ + struct alpha_elf_find_line *find_line_info; + +}; + +#define alpha_elf_tdata(abfd) \ + ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any) + +#define is_alpha_elf(bfd) \ + (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && elf_tdata (bfd) != NULL \ + && elf_object_id (bfd) == ALPHA_ELF_DATA) + +static bfd_boolean +elf64_alpha_mkobject (bfd *abfd) +{ + return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata), + ALPHA_ELF_DATA); +} + +static bfd_boolean +elf64_alpha_object_p (bfd *abfd) +{ + /* Set the right machine number for an Alpha ELF file. */ + return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0); +} + +/* A relocation function which doesn't do anything. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, + asymbol *sym ATTRIBUTE_UNUSED, + void * data ATTRIBUTE_UNUSED, asection *sec, + bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_ok; +} + +/* A relocation function used for an unsupported reloc. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc, + asymbol *sym ATTRIBUTE_UNUSED, + void * data ATTRIBUTE_UNUSED, asection *sec, + bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) +{ + if (output_bfd) + reloc->address += sec->output_offset; + return bfd_reloc_notsupported; +} + +/* Do the work of the GPDISP relocation. */ + +static bfd_reloc_status_type +elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah, + bfd_byte *p_lda) +{ + bfd_reloc_status_type ret = bfd_reloc_ok; + bfd_vma addend; + unsigned long i_ldah, i_lda; + + i_ldah = bfd_get_32 (abfd, p_ldah); + i_lda = bfd_get_32 (abfd, p_lda); + + /* Complain if the instructions are not correct. */ + if (((i_ldah >> 26) & 0x3f) != 0x09 + || ((i_lda >> 26) & 0x3f) != 0x08) + ret = bfd_reloc_dangerous; + + /* Extract the user-supplied offset, mirroring the sign extensions + that the instructions perform. */ + addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff); + addend = (addend ^ 0x80008000) - 0x80008000; + + gpdisp += addend; + + if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000 + || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000) + ret = bfd_reloc_overflow; + + /* compensate for the sign extension again. */ + i_ldah = ((i_ldah & 0xffff0000) + | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff)); + i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff); + + bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah); + bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda); + + return ret; +} + +/* The special function for the GPDISP reloc. */ + +static bfd_reloc_status_type +elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry, + asymbol *sym ATTRIBUTE_UNUSED, void * data, + asection *input_section, bfd *output_bfd, + char **err_msg) +{ + bfd_reloc_status_type ret; + bfd_vma gp, relocation; + bfd_vma high_address; + bfd_byte *p_ldah, *p_lda; + + /* Don't do anything if we're not doing a final link. */ + if (output_bfd) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + high_address = bfd_get_section_limit (abfd, input_section); + if (reloc_entry->address > high_address + || reloc_entry->address + reloc_entry->addend > high_address) + return bfd_reloc_outofrange; + + /* The gp used in the portion of the output object to which this + input object belongs is cached on the input bfd. */ + gp = _bfd_get_gp_value (abfd); + + relocation = (input_section->output_section->vma + + input_section->output_offset + + reloc_entry->address); + + p_ldah = (bfd_byte *) data + reloc_entry->address; + p_lda = p_ldah + reloc_entry->addend; + + ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda); + + /* Complain if the instructions are not correct. */ + if (ret == bfd_reloc_dangerous) + *err_msg = _("GPDISP relocation did not find ldah and lda instructions"); + + return ret; +} + +/* In case we're on a 32-bit machine, construct a 64-bit "-1" value + from smaller values. Start with zero, widen, *then* decrement. */ +#define MINUS_ONE (((bfd_vma)0) - 1) + + +#define SKIP_HOWTO(N) \ + HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0) + +static reloc_howto_type elf64_alpha_howto_table[] = +{ + HOWTO (R_ALPHA_NONE, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_nil, /* special_function */ + "NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A 32 bit reference to a symbol. */ + HOWTO (R_ALPHA_REFLONG, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "REFLONG", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 64 bit reference to a symbol. */ + HOWTO (R_ALPHA_REFQUAD, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "REFQUAD", /* name */ + FALSE, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 32 bit GP relative offset. This is just like REFLONG except + that when the value is used the value of the gp register will be + added in. */ + HOWTO (R_ALPHA_GPREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GPREL32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Used for an instruction that refers to memory off the GP register. */ + HOWTO (R_ALPHA_LITERAL, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "ELF_LITERAL", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* This reloc only appears immediately following an ELF_LITERAL reloc. + It identifies a use of the literal. The symbol index is special: + 1 means the literal address is in the base register of a memory + format instruction; 2 means the literal address is in the byte + offset register of a byte-manipulation instruction; 3 means the + literal address is in the target register of a jsr instruction. + This does not actually do any relocation. */ + HOWTO (R_ALPHA_LITUSE, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_nil, /* special_function */ + "LITUSE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Load the gp register. This is always used for a ldah instruction + which loads the upper 16 bits of the gp register. The symbol + index of the GPDISP instruction is an offset in bytes to the lda + instruction that loads the lower 16 bits. The value to use for + the relocation is the difference between the GP value and the + current location; the load will always be done against a register + holding the current address. + + NOTE: Unlike ECOFF, partial in-place relocation is not done. If + any offset is present in the instructions, it is an offset from + the register to the ldah instruction. This lets us avoid any + stupid hackery like inventing a gp value to do partial relocation + against. Also unlike ECOFF, we do the whole relocation off of + the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd, + space consuming bit, that, since all the information was present + in the GPDISP_HI16 reloc. */ + HOWTO (R_ALPHA_GPDISP, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + elf64_alpha_reloc_gpdisp, /* special_function */ + "GPDISP", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A 21 bit branch. */ + HOWTO (R_ALPHA_BRADDR, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 21, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "BRADDR", /* name */ + FALSE, /* partial_inplace */ + 0x1fffff, /* src_mask */ + 0x1fffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A hint for a jump to a register. */ + HOWTO (R_ALPHA_HINT, /* type */ + 2, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 14, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "HINT", /* name */ + FALSE, /* partial_inplace */ + 0x3fff, /* src_mask */ + 0x3fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 16 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "SREL16", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 32 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "SREL32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A 64 bit PC relative offset. */ + HOWTO (R_ALPHA_SREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "SREL64", /* name */ + FALSE, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Skip 12 - 16; deprecated ECOFF relocs. */ + SKIP_HOWTO (12), + SKIP_HOWTO (13), + SKIP_HOWTO (14), + SKIP_HOWTO (15), + SKIP_HOWTO (16), + + /* The high 16 bits of the displacement from GP to the target. */ + HOWTO (R_ALPHA_GPRELHIGH, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GPRELHIGH", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The low 16 bits of the displacement from GP to the target. */ + HOWTO (R_ALPHA_GPRELLOW, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GPRELLOW", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16-bit displacement from the GP to the target. */ + HOWTO (R_ALPHA_GPREL16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GPREL16", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Skip 20 - 23; deprecated ECOFF relocs. */ + SKIP_HOWTO (20), + SKIP_HOWTO (21), + SKIP_HOWTO (22), + SKIP_HOWTO (23), + + /* Misc ELF relocations. */ + + /* A dynamic relocation to copy the target into our .dynbss section. */ + /* Not generated, as all Alpha objects use PIC, so it is not needed. It + is present because every other ELF has one, but should not be used + because .dynbss is an ugly thing. */ + HOWTO (R_ALPHA_COPY, + 0, + 0, + 0, + FALSE, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "COPY", + FALSE, + 0, + 0, + TRUE), + + /* A dynamic relocation for a .got entry. */ + HOWTO (R_ALPHA_GLOB_DAT, + 0, + 0, + 0, + FALSE, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "GLOB_DAT", + FALSE, + 0, + 0, + TRUE), + + /* A dynamic relocation for a .plt entry. */ + HOWTO (R_ALPHA_JMP_SLOT, + 0, + 0, + 0, + FALSE, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "JMP_SLOT", + FALSE, + 0, + 0, + TRUE), + + /* A dynamic relocation to add the base of the DSO to a 64-bit field. */ + HOWTO (R_ALPHA_RELATIVE, + 0, + 0, + 0, + FALSE, + 0, + complain_overflow_dont, + bfd_elf_generic_reloc, + "RELATIVE", + FALSE, + 0, + 0, + TRUE), + + /* A 21 bit branch that adjusts for gp loads. */ + HOWTO (R_ALPHA_BRSGP, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 21, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "BRSGP", /* name */ + FALSE, /* partial_inplace */ + 0x1fffff, /* src_mask */ + 0x1fffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Creates a tls_index for the symbol in the got. */ + HOWTO (R_ALPHA_TLSGD, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TLSGD", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Creates a tls_index for the (current) module in the got. */ + HOWTO (R_ALPHA_TLSLDM, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TLSLDM", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A dynamic relocation for a DTP module entry. */ + HOWTO (R_ALPHA_DTPMOD64, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "DTPMOD64", /* name */ + FALSE, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Creates a 64-bit offset in the got for the displacement + from DTP to the target. */ + HOWTO (R_ALPHA_GOTDTPREL, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GOTDTPREL", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A dynamic relocation for a displacement from DTP to the target. */ + HOWTO (R_ALPHA_DTPREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "DTPREL64", /* name */ + FALSE, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The high 16 bits of the displacement from DTP to the target. */ + HOWTO (R_ALPHA_DTPRELHI, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "DTPRELHI", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The low 16 bits of the displacement from DTP to the target. */ + HOWTO (R_ALPHA_DTPRELLO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "DTPRELLO", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16-bit displacement from DTP to the target. */ + HOWTO (R_ALPHA_DTPREL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "DTPREL16", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Creates a 64-bit offset in the got for the displacement + from TP to the target. */ + HOWTO (R_ALPHA_GOTTPREL, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "GOTTPREL", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A dynamic relocation for a displacement from TP to the target. */ + HOWTO (R_ALPHA_TPREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TPREL64", /* name */ + FALSE, /* partial_inplace */ + MINUS_ONE, /* src_mask */ + MINUS_ONE, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The high 16 bits of the displacement from TP to the target. */ + HOWTO (R_ALPHA_TPRELHI, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TPRELHI", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The low 16 bits of the displacement from TP to the target. */ + HOWTO (R_ALPHA_TPRELLO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TPRELLO", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16-bit displacement from TP to the target. */ + HOWTO (R_ALPHA_TPREL16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "TPREL16", /* name */ + FALSE, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + +/* A mapping from BFD reloc types to Alpha ELF reloc types. */ + +struct elf_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + int elf_reloc_val; +}; + +static const struct elf_reloc_map elf64_alpha_reloc_map[] = +{ + {BFD_RELOC_NONE, R_ALPHA_NONE}, + {BFD_RELOC_32, R_ALPHA_REFLONG}, + {BFD_RELOC_64, R_ALPHA_REFQUAD}, + {BFD_RELOC_CTOR, R_ALPHA_REFQUAD}, + {BFD_RELOC_GPREL32, R_ALPHA_GPREL32}, + {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL}, + {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE}, + {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP}, + {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR}, + {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT}, + {BFD_RELOC_16_PCREL, R_ALPHA_SREL16}, + {BFD_RELOC_32_PCREL, R_ALPHA_SREL32}, + {BFD_RELOC_64_PCREL, R_ALPHA_SREL64}, + {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH}, + {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW}, + {BFD_RELOC_GPREL16, R_ALPHA_GPREL16}, + {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP}, + {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD}, + {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM}, + {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64}, + {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL}, + {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64}, + {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI}, + {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO}, + {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16}, + {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL}, + {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64}, + {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI}, + {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO}, + {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16}, +}; + +/* Given a BFD reloc type, return a HOWTO structure. */ + +static reloc_howto_type * +elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + const struct elf_reloc_map *i, *e; + i = e = elf64_alpha_reloc_map; + e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map); + for (; i != e; ++i) + { + if (i->bfd_reloc_val == code) + return &elf64_alpha_howto_table[i->elf_reloc_val]; + } + return 0; +} + +static reloc_howto_type * +elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, + const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < (sizeof (elf64_alpha_howto_table) + / sizeof (elf64_alpha_howto_table[0])); + i++) + if (elf64_alpha_howto_table[i].name != NULL + && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0) + return &elf64_alpha_howto_table[i]; + + return NULL; +} + +/* Given an Alpha ELF reloc type, fill in an arelent structure. */ + +static void +elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned r_type = ELF64_R_TYPE(dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max); + cache_ptr->howto = &elf64_alpha_howto_table[r_type]; +} + +/* These two relocations create a two-word entry in the got. */ +#define alpha_got_entry_size(r_type) \ + (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8) + +/* This is PT_TLS segment p_vaddr. */ +#define alpha_get_dtprel_base(info) \ + (elf_hash_table (info)->tls_sec->vma) + +/* Main program TLS (whose template starts at PT_TLS p_vaddr) + is assigned offset round(16, PT_TLS p_align). */ +#define alpha_get_tprel_base(info) \ + (elf_hash_table (info)->tls_sec->vma \ + - align_power ((bfd_vma) 16, \ + elf_hash_table (info)->tls_sec->alignment_power)) + +/* Handle an Alpha specific section when reading an object file. This + is called when bfd_section_from_shdr finds a section with an unknown + type. + FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure + how to. */ + +static bfd_boolean +elf64_alpha_section_from_shdr (bfd *abfd, + Elf_Internal_Shdr *hdr, + const char *name, + int shindex) +{ + asection *newsect; + + /* There ought to be a place to keep ELF backend specific flags, but + at the moment there isn't one. We just keep track of the + sections by their name, instead. Fortunately, the ABI gives + suggested names for all the MIPS specific sections, so we will + probably get away with this. */ + switch (hdr->sh_type) + { + case SHT_ALPHA_DEBUG: + if (strcmp (name, ".mdebug") != 0) + return FALSE; + break; + default: + return FALSE; + } + + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) + return FALSE; + newsect = hdr->bfd_section; + + if (hdr->sh_type == SHT_ALPHA_DEBUG) + { + if (! bfd_set_section_flags (abfd, newsect, + (bfd_get_section_flags (abfd, newsect) + | SEC_DEBUGGING))) + return FALSE; + } + + return TRUE; +} + +/* Convert Alpha specific section flags to bfd internal section flags. */ + +static bfd_boolean +elf64_alpha_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) +{ + if (hdr->sh_flags & SHF_ALPHA_GPREL) + *flags |= SEC_SMALL_DATA; + + return TRUE; +} + +/* Set the correct type for an Alpha ELF section. We do this by the + section name, which is a hack, but ought to work. */ + +static bfd_boolean +elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec) +{ + register const char *name; + + name = bfd_get_section_name (abfd, sec); + + if (strcmp (name, ".mdebug") == 0) + { + hdr->sh_type = SHT_ALPHA_DEBUG; + /* In a shared object on Irix 5.3, the .mdebug section has an + entsize of 0. FIXME: Does this matter? */ + if ((abfd->flags & DYNAMIC) != 0 ) + hdr->sh_entsize = 0; + else + hdr->sh_entsize = 1; + } + else if ((sec->flags & SEC_SMALL_DATA) + || strcmp (name, ".sdata") == 0 + || strcmp (name, ".sbss") == 0 + || strcmp (name, ".lit4") == 0 + || strcmp (name, ".lit8") == 0) + hdr->sh_flags |= SHF_ALPHA_GPREL; + + return TRUE; +} + +/* Hook called by the linker routine which adds symbols from an object + file. We use it to put .comm items in .sbss, and not .bss. */ + +static bfd_boolean +elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info, + Elf_Internal_Sym *sym, + const char **namep ATTRIBUTE_UNUSED, + flagword *flagsp ATTRIBUTE_UNUSED, + asection **secp, bfd_vma *valp) +{ + if (sym->st_shndx == SHN_COMMON + && !info->relocatable + && sym->st_size <= elf_gp_size (abfd)) + { + /* Common symbols less than or equal to -G nn bytes are + automatically put into .sbss. */ + + asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); + + if (scomm == NULL) + { + scomm = bfd_make_section_with_flags (abfd, ".scommon", + (SEC_ALLOC + | SEC_IS_COMMON + | SEC_LINKER_CREATED)); + if (scomm == NULL) + return FALSE; + } + + *secp = scomm; + *valp = sym->st_size; + } + + return TRUE; +} + +/* Create the .got section. */ + +static bfd_boolean +elf64_alpha_create_got_section (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED) +{ + flagword flags; + asection *s; + + if (! is_alpha_elf (abfd)) + return FALSE; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + + alpha_elf_tdata (abfd)->got = s; + + /* Make sure the object's gotobj is set to itself so that we default + to every object with its own .got. We'll merge .gots later once + we've collected each object's info. */ + alpha_elf_tdata (abfd)->gotobj = abfd; + + return TRUE; +} + +/* Create all the dynamic sections. */ + +static bfd_boolean +elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) +{ + asection *s; + flagword flags; + struct elf_link_hash_entry *h; + + if (! is_alpha_elf (abfd)) + return FALSE; + + /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */ + + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | (elf64_alpha_use_secureplt ? SEC_READONLY : 0)); + s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 4)) + return FALSE; + + /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the + .plt section. */ + h = _bfd_elf_define_linkage_sym (abfd, info, s, + "_PROCEDURE_LINKAGE_TABLE_"); + elf_hash_table (info)->hplt = h; + if (h == NULL) + return FALSE; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED | SEC_READONLY); + s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + + if (elf64_alpha_use_secureplt) + { + flags = SEC_ALLOC | SEC_LINKER_CREATED; + s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); + if (s == NULL || ! bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + } + + /* We may or may not have created a .got section for this object, but + we definitely havn't done the rest of the work. */ + + if (alpha_elf_tdata(abfd)->gotobj == NULL) + { + if (!elf64_alpha_create_got_section (abfd, info)) + return FALSE; + } + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED | SEC_READONLY); + s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags); + if (s == NULL + || !bfd_set_section_alignment (abfd, s, 3)) + return FALSE; + + /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the + dynobj's .got section. We don't do this in the linker script + because we don't want to define the symbol if we are not creating + a global offset table. */ + h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got, + "_GLOBAL_OFFSET_TABLE_"); + elf_hash_table (info)->hgot = h; + if (h == NULL) + return FALSE; + + return TRUE; +} + +/* Read ECOFF debugging information from a .mdebug section into a + ecoff_debug_info structure. */ + +static bfd_boolean +elf64_alpha_read_ecoff_info (bfd *abfd, asection *section, + struct ecoff_debug_info *debug) +{ + HDRR *symhdr; + const struct ecoff_debug_swap *swap; + char *ext_hdr = NULL; + + swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + memset (debug, 0, sizeof (*debug)); + + ext_hdr = (char *) bfd_malloc (swap->external_hdr_size); + if (ext_hdr == NULL && swap->external_hdr_size != 0) + goto error_return; + + if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0, + swap->external_hdr_size)) + goto error_return; + + symhdr = &debug->symbolic_header; + (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr); + + /* The symbolic header contains absolute file offsets and sizes to + read. */ +#define READ(ptr, offset, count, size, type) \ + if (symhdr->count == 0) \ + debug->ptr = NULL; \ + else \ + { \ + bfd_size_type amt = (bfd_size_type) size * symhdr->count; \ + debug->ptr = (type) bfd_malloc (amt); \ + if (debug->ptr == NULL) \ + goto error_return; \ + if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \ + || bfd_bread (debug->ptr, amt, abfd) != amt) \ + goto error_return; \ + } + + READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *); + READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *); + READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *); + READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *); + READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *); + READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext), + union aux_ext *); + READ (ss, cbSsOffset, issMax, sizeof (char), char *); + READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *); + READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *); + READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *); + READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *); +#undef READ + + debug->fdr = NULL; + + return TRUE; + + error_return: + if (ext_hdr != NULL) + free (ext_hdr); + if (debug->line != NULL) + free (debug->line); + if (debug->external_dnr != NULL) + free (debug->external_dnr); + if (debug->external_pdr != NULL) + free (debug->external_pdr); + if (debug->external_sym != NULL) + free (debug->external_sym); + if (debug->external_opt != NULL) + free (debug->external_opt); + if (debug->external_aux != NULL) + free (debug->external_aux); + if (debug->ss != NULL) + free (debug->ss); + if (debug->ssext != NULL) + free (debug->ssext); + if (debug->external_fdr != NULL) + free (debug->external_fdr); + if (debug->external_rfd != NULL) + free (debug->external_rfd); + if (debug->external_ext != NULL) + free (debug->external_ext); + return FALSE; +} + +/* Alpha ELF local labels start with '$'. */ + +static bfd_boolean +elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) +{ + return name[0] == '$'; +} + +static bfd_boolean +elf64_alpha_find_nearest_line (bfd *abfd, asection *section, asymbol **symbols, + bfd_vma offset, const char **filename_ptr, + const char **functionname_ptr, + unsigned int *line_ptr) +{ + asection *msec; + + if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections, + section, symbols, offset, + filename_ptr, functionname_ptr, + line_ptr, NULL, 0, + &elf_tdata (abfd)->dwarf2_find_line_info)) + return TRUE; + + msec = bfd_get_section_by_name (abfd, ".mdebug"); + if (msec != NULL) + { + flagword origflags; + struct alpha_elf_find_line *fi; + const struct ecoff_debug_swap * const swap = + get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + + /* If we are called during a link, alpha_elf_final_link may have + cleared the SEC_HAS_CONTENTS field. We force it back on here + if appropriate (which it normally will be). */ + origflags = msec->flags; + if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS) + msec->flags |= SEC_HAS_CONTENTS; + + fi = alpha_elf_tdata (abfd)->find_line_info; + if (fi == NULL) + { + bfd_size_type external_fdr_size; + char *fraw_src; + char *fraw_end; + struct fdr *fdr_ptr; + bfd_size_type amt = sizeof (struct alpha_elf_find_line); + + fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt); + if (fi == NULL) + { + msec->flags = origflags; + return FALSE; + } + + if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d)) + { + msec->flags = origflags; + return FALSE; + } + + /* Swap in the FDR information. */ + amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr); + fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt); + if (fi->d.fdr == NULL) + { + msec->flags = origflags; + return FALSE; + } + external_fdr_size = swap->external_fdr_size; + fdr_ptr = fi->d.fdr; + fraw_src = (char *) fi->d.external_fdr; + fraw_end = (fraw_src + + fi->d.symbolic_header.ifdMax * external_fdr_size); + for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++) + (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr); + + alpha_elf_tdata (abfd)->find_line_info = fi; + + /* Note that we don't bother to ever free this information. + find_nearest_line is either called all the time, as in + objdump -l, so the information should be saved, or it is + rarely called, as in ld error messages, so the memory + wasted is unimportant. Still, it would probably be a + good idea for free_cached_info to throw it away. */ + } + + if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap, + &fi->i, filename_ptr, functionname_ptr, + line_ptr)) + { + msec->flags = origflags; + return TRUE; + } + + msec->flags = origflags; + } + + /* Fall back on the generic ELF find_nearest_line routine. */ + + return _bfd_elf_find_nearest_line (abfd, section, symbols, offset, + filename_ptr, functionname_ptr, + line_ptr); +} + +/* Structure used to pass information to alpha_elf_output_extsym. */ + +struct extsym_info +{ + bfd *abfd; + struct bfd_link_info *info; + struct ecoff_debug_info *debug; + const struct ecoff_debug_swap *swap; + bfd_boolean failed; +}; + +static bfd_boolean +elf64_alpha_output_extsym (struct alpha_elf_link_hash_entry *h, void * data) +{ + struct extsym_info *einfo = (struct extsym_info *) data; + bfd_boolean strip; + asection *sec, *output_section; + + if (h->root.indx == -2) + strip = FALSE; + else if ((h->root.def_dynamic + || h->root.ref_dynamic + || h->root.root.type == bfd_link_hash_new) + && !h->root.def_regular + && !h->root.ref_regular) + strip = TRUE; + else if (einfo->info->strip == strip_all + || (einfo->info->strip == strip_some + && bfd_hash_lookup (einfo->info->keep_hash, + h->root.root.root.string, + FALSE, FALSE) == NULL)) + strip = TRUE; + else + strip = FALSE; + + if (strip) + return TRUE; + + if (h->esym.ifd == -2) + { + h->esym.jmptbl = 0; + h->esym.cobol_main = 0; + h->esym.weakext = 0; + h->esym.reserved = 0; + h->esym.ifd = ifdNil; + h->esym.asym.value = 0; + h->esym.asym.st = stGlobal; + + if (h->root.root.type != bfd_link_hash_defined + && h->root.root.type != bfd_link_hash_defweak) + h->esym.asym.sc = scAbs; + else + { + const char *name; + + sec = h->root.root.u.def.section; + output_section = sec->output_section; + + /* When making a shared library and symbol h is the one from + the another shared library, OUTPUT_SECTION may be null. */ + if (output_section == NULL) + h->esym.asym.sc = scUndefined; + else + { + name = bfd_section_name (output_section->owner, output_section); + + if (strcmp (name, ".text") == 0) + h->esym.asym.sc = scText; + else if (strcmp (name, ".data") == 0) + h->esym.asym.sc = scData; + else if (strcmp (name, ".sdata") == 0) + h->esym.asym.sc = scSData; + else if (strcmp (name, ".rodata") == 0 + || strcmp (name, ".rdata") == 0) + h->esym.asym.sc = scRData; + else if (strcmp (name, ".bss") == 0) + h->esym.asym.sc = scBss; + else if (strcmp (name, ".sbss") == 0) + h->esym.asym.sc = scSBss; + else if (strcmp (name, ".init") == 0) + h->esym.asym.sc = scInit; + else if (strcmp (name, ".fini") == 0) + h->esym.asym.sc = scFini; + else + h->esym.asym.sc = scAbs; + } + } + + h->esym.asym.reserved = 0; + h->esym.asym.index = indexNil; + } + + if (h->root.root.type == bfd_link_hash_common) + h->esym.asym.value = h->root.root.u.c.size; + else if (h->root.root.type == bfd_link_hash_defined + || h->root.root.type == bfd_link_hash_defweak) + { + if (h->esym.asym.sc == scCommon) + h->esym.asym.sc = scBss; + else if (h->esym.asym.sc == scSCommon) + h->esym.asym.sc = scSBss; + + sec = h->root.root.u.def.section; + output_section = sec->output_section; + if (output_section != NULL) + h->esym.asym.value = (h->root.root.u.def.value + + sec->output_offset + + output_section->vma); + else + h->esym.asym.value = 0; + } + + if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap, + h->root.root.root.string, + &h->esym)) + { + einfo->failed = TRUE; + return FALSE; + } + + return TRUE; +} + +/* Search for and possibly create a got entry. */ + +static struct alpha_elf_got_entry * +get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h, + unsigned long r_type, unsigned long r_symndx, + bfd_vma r_addend) +{ + struct alpha_elf_got_entry *gotent; + struct alpha_elf_got_entry **slot; + + if (h) + slot = &h->got_entries; + else + { + /* This is a local .got entry -- record for merge. */ + + struct alpha_elf_got_entry **local_got_entries; + + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + if (!local_got_entries) + { + bfd_size_type size; + Elf_Internal_Shdr *symtab_hdr; + + symtab_hdr = &elf_tdata(abfd)->symtab_hdr; + size = symtab_hdr->sh_info; + size *= sizeof (struct alpha_elf_got_entry *); + + local_got_entries + = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size); + if (!local_got_entries) + return NULL; + + alpha_elf_tdata (abfd)->local_got_entries = local_got_entries; + } + + slot = &local_got_entries[r_symndx]; + } + + for (gotent = *slot; gotent ; gotent = gotent->next) + if (gotent->gotobj == abfd + && gotent->reloc_type == r_type + && gotent->addend == r_addend) + break; + + if (!gotent) + { + int entry_size; + bfd_size_type amt; + + amt = sizeof (struct alpha_elf_got_entry); + gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt); + if (!gotent) + return NULL; + + gotent->gotobj = abfd; + gotent->addend = r_addend; + gotent->got_offset = -1; + gotent->plt_offset = -1; + gotent->use_count = 1; + gotent->reloc_type = r_type; + gotent->reloc_done = 0; + gotent->reloc_xlated = 0; + + gotent->next = *slot; + *slot = gotent; + + entry_size = alpha_got_entry_size (r_type); + alpha_elf_tdata (abfd)->total_got_size += entry_size; + if (!h) + alpha_elf_tdata(abfd)->local_got_size += entry_size; + } + else + gotent->use_count += 1; + + return gotent; +} + +static bfd_boolean +elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah) +{ + return ((ah->root.type == STT_FUNC + || ah->root.root.type == bfd_link_hash_undefweak + || ah->root.root.type == bfd_link_hash_undefined) + && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0 + && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0); +} + +/* Handle dynamic relocations when doing an Alpha ELF link. */ + +static bfd_boolean +elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + bfd *dynobj; + asection *sreloc; + Elf_Internal_Shdr *symtab_hdr; + struct alpha_elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel, *relend; + bfd_size_type amt; + + if (info->relocatable) + return TRUE; + + /* Don't do anything special with non-loaded, non-alloced sections. + In particular, any relocs in such sections should not affect GOT + and PLT reference counting (ie. we don't allow them to create GOT + or PLT entries), there's no possibility or desire to optimize TLS + relocs, and there's not much point in propagating relocs to shared + libs that the dynamic linker won't relocate. */ + if ((sec->flags & SEC_ALLOC) == 0) + return TRUE; + + BFD_ASSERT (is_alpha_elf (abfd)); + + dynobj = elf_hash_table (info)->dynobj; + if (dynobj == NULL) + elf_hash_table (info)->dynobj = dynobj = abfd; + + sreloc = NULL; + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = alpha_elf_sym_hashes (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; ++rel) + { + enum { + NEED_GOT = 1, + NEED_GOT_ENTRY = 2, + NEED_DYNREL = 4 + }; + + unsigned long r_symndx, r_type; + struct alpha_elf_link_hash_entry *h; + unsigned int gotent_flags; + bfd_boolean maybe_dynamic; + unsigned int need; + bfd_vma addend; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.root.non_ir_ref = 1; + h->root.ref_regular = 1; + } + + /* We can only get preliminary data on whether a symbol is + locally or externally defined, as not all of the input files + have yet been processed. Do something with what we know, as + this may help reduce memory usage and processing time later. */ + maybe_dynamic = FALSE; + if (h && ((info->shared + && (!info->symbolic + || info->unresolved_syms_in_shared_libs == RM_IGNORE)) + || !h->root.def_regular + || h->root.root.type == bfd_link_hash_defweak)) + maybe_dynamic = TRUE; + + need = 0; + gotent_flags = 0; + r_type = ELF64_R_TYPE (rel->r_info); + addend = rel->r_addend; + + switch (r_type) + { + case R_ALPHA_LITERAL: + need = NEED_GOT | NEED_GOT_ENTRY; + + /* Remember how this literal is used from its LITUSEs. + This will be important when it comes to decide if we can + create a .plt entry for a function symbol. */ + while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE) + if (rel->r_addend >= 1 && rel->r_addend <= 6) + gotent_flags |= 1 << rel->r_addend; + --rel; + + /* No LITUSEs -- presumably the address is used somehow. */ + if (gotent_flags == 0) + gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR; + break; + + case R_ALPHA_GPDISP: + case R_ALPHA_GPREL16: + case R_ALPHA_GPREL32: + case R_ALPHA_GPRELHIGH: + case R_ALPHA_GPRELLOW: + case R_ALPHA_BRSGP: + need = NEED_GOT; + break; + + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + if (info->shared || maybe_dynamic) + need = NEED_DYNREL; + break; + + case R_ALPHA_TLSLDM: + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the STN_UNDEF (0) symbol so that they all match. */ + r_symndx = STN_UNDEF; + h = 0; + maybe_dynamic = FALSE; + /* FALLTHRU */ + + case R_ALPHA_TLSGD: + case R_ALPHA_GOTDTPREL: + need = NEED_GOT | NEED_GOT_ENTRY; + break; + + case R_ALPHA_GOTTPREL: + need = NEED_GOT | NEED_GOT_ENTRY; + gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE; + if (info->shared) + info->flags |= DF_STATIC_TLS; + break; + + case R_ALPHA_TPREL64: + if (info->shared && !info->pie) + { + info->flags |= DF_STATIC_TLS; + need = NEED_DYNREL; + } + else if (maybe_dynamic) + need = NEED_DYNREL; + break; + } + + if (need & NEED_GOT) + { + if (alpha_elf_tdata(abfd)->gotobj == NULL) + { + if (!elf64_alpha_create_got_section (abfd, info)) + return FALSE; + } + } + + if (need & NEED_GOT_ENTRY) + { + struct alpha_elf_got_entry *gotent; + + gotent = get_got_entry (abfd, h, r_type, r_symndx, addend); + if (!gotent) + return FALSE; + + if (gotent_flags) + { + gotent->flags |= gotent_flags; + if (h) + { + gotent_flags |= h->flags; + h->flags = gotent_flags; + + /* Make a guess as to whether a .plt entry is needed. */ + /* ??? It appears that we won't make it into + adjust_dynamic_symbol for symbols that remain + totally undefined. Copying this check here means + we can create a plt entry for them too. */ + h->root.needs_plt + = (maybe_dynamic && elf64_alpha_want_plt (h)); + } + } + } + + if (need & NEED_DYNREL) + { + /* We need to create the section here now whether we eventually + use it or not so that it gets mapped to an output section by + the linker. If not used, we'll kill it in size_dynamic_sections. */ + if (sreloc == NULL) + { + sreloc = _bfd_elf_make_dynamic_reloc_section + (sec, dynobj, 3, abfd, /*rela?*/ TRUE); + + if (sreloc == NULL) + return FALSE; + } + + if (h) + { + /* Since we havn't seen all of the input symbols yet, we + don't know whether we'll actually need a dynamic relocation + entry for this reloc. So make a record of it. Once we + find out if this thing needs dynamic relocation we'll + expand the relocation sections by the appropriate amount. */ + + struct alpha_elf_reloc_entry *rent; + + for (rent = h->reloc_entries; rent; rent = rent->next) + if (rent->rtype == r_type && rent->srel == sreloc) + break; + + if (!rent) + { + amt = sizeof (struct alpha_elf_reloc_entry); + rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt); + if (!rent) + return FALSE; + + rent->srel = sreloc; + rent->rtype = r_type; + rent->count = 1; + rent->reltext = (sec->flags & SEC_READONLY) != 0; + + rent->next = h->reloc_entries; + h->reloc_entries = rent; + } + else + rent->count++; + } + else if (info->shared) + { + /* If this is a shared library, and the section is to be + loaded into memory, we need a RELATIVE reloc. */ + sreloc->size += sizeof (Elf64_External_Rela); + if (sec->flags & SEC_READONLY) + info->flags |= DF_TEXTREL; + } + } + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, Elf_Internal_Sym *sym) +{ + /* These relocations don't really reference a symbol. Instead we store + extra data in their addend slot. Ignore the symbol. */ + switch (ELF64_R_TYPE (rel->r_info)) + { + case R_ALPHA_LITUSE: + case R_ALPHA_GPDISP: + case R_ALPHA_HINT: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + +/* Update the got entry reference counts for the section being removed. */ + +static bfd_boolean +elf64_alpha_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct alpha_elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel, *relend; + + if (info->relocatable) + return TRUE; + + symtab_hdr = &elf_symtab_hdr (abfd); + sym_hashes = alpha_elf_sym_hashes (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx, r_type; + struct alpha_elf_link_hash_entry *h = NULL; + struct alpha_elf_got_entry *gotent; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link; + } + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + case R_ALPHA_LITERAL: + /* ??? Ignore re-computation of gotent_flags. We're not + carrying a use-count for each bit in that mask. */ + + case R_ALPHA_TLSGD: + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + /* Fetch the got entry from the tables. */ + gotent = get_got_entry (abfd, h, r_type, r_symndx, rel->r_addend); + + /* The got entry *must* exist, since we should have created it + before during check_relocs. Also note that get_got_entry + assumed this was going to be another use, and so incremented + the use count again. Thus the use count must be at least the + one real use and the "use" we just added. */ + if (gotent == NULL || gotent->use_count < 2) + { + abort (); + return FALSE; + } + gotent->use_count -= 2; + break; + + default: + break; + } + } + + return TRUE; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + bfd *dynobj; + asection *s; + struct alpha_elf_link_hash_entry *ah; + + dynobj = elf_hash_table(info)->dynobj; + ah = (struct alpha_elf_link_hash_entry *)h; + + /* Now that we've seen all of the input symbols, finalize our decision + about whether this symbol should get a .plt entry. Irritatingly, it + is common for folk to leave undefined symbols in shared libraries, + and they still expect lazy binding; accept undefined symbols in lieu + of STT_FUNC. */ + if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah)) + { + h->needs_plt = TRUE; + + s = bfd_get_linker_section (dynobj, ".plt"); + if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info)) + return FALSE; + + /* We need one plt entry per got subsection. Delay allocation of + the actual plt entries until size_plt_section, called from + size_dynamic_sections or during relaxation. */ + + return TRUE; + } + else + h->needs_plt = FALSE; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->u.weakdef != NULL) + { + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.weakdef->root.u.def.value; + return TRUE; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. The Alpha, since it uses .got entries for all + symbols even in regular objects, does not need the hackery of a + .dynbss section and COPY dynamic relocations. */ + + return TRUE; +} + +/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */ + +static void +elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h, + const Elf_Internal_Sym *isym, + bfd_boolean definition, + bfd_boolean dynamic) +{ + if (!dynamic && definition) + h->other = ((h->other & ELF_ST_VISIBILITY (-1)) + | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); +} + +/* Symbol versioning can create new symbols, and make our old symbols + indirect to the new ones. Consolidate the got and reloc information + in these situations. */ + +static void +elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct alpha_elf_link_hash_entry *hi + = (struct alpha_elf_link_hash_entry *) ind; + struct alpha_elf_link_hash_entry *hs + = (struct alpha_elf_link_hash_entry *) dir; + + /* Do the merging in the superclass. */ + _bfd_elf_link_hash_copy_indirect(info, dir, ind); + + /* Merge the flags. Whee. */ + hs->flags |= hi->flags; + + /* ??? It's unclear to me what's really supposed to happen when + "merging" defweak and defined symbols, given that we don't + actually throw away the defweak. This more-or-less copies + the logic related to got and plt entries in the superclass. */ + if (ind->root.type != bfd_link_hash_indirect) + return; + + /* Merge the .got entries. Cannibalize the old symbol's list in + doing so, since we don't need it anymore. */ + + if (hs->got_entries == NULL) + hs->got_entries = hi->got_entries; + else + { + struct alpha_elf_got_entry *gi, *gs, *gin, *gsh; + + gsh = hs->got_entries; + for (gi = hi->got_entries; gi ; gi = gin) + { + gin = gi->next; + for (gs = gsh; gs ; gs = gs->next) + if (gi->gotobj == gs->gotobj + && gi->reloc_type == gs->reloc_type + && gi->addend == gs->addend) + { + gi->use_count += gs->use_count; + goto got_found; + } + gi->next = hs->got_entries; + hs->got_entries = gi; + got_found:; + } + } + hi->got_entries = NULL; + + /* And similar for the reloc entries. */ + + if (hs->reloc_entries == NULL) + hs->reloc_entries = hi->reloc_entries; + else + { + struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh; + + rsh = hs->reloc_entries; + for (ri = hi->reloc_entries; ri ; ri = rin) + { + rin = ri->next; + for (rs = rsh; rs ; rs = rs->next) + if (ri->rtype == rs->rtype && ri->srel == rs->srel) + { + rs->count += ri->count; + goto found_reloc; + } + ri->next = hs->reloc_entries; + hs->reloc_entries = ri; + found_reloc:; + } + } + hi->reloc_entries = NULL; +} + +/* Is it possible to merge two object file's .got tables? */ + +static bfd_boolean +elf64_alpha_can_merge_gots (bfd *a, bfd *b) +{ + int total = alpha_elf_tdata (a)->total_got_size; + bfd *bsub; + + /* Trivial quick fallout test. */ + if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE) + return TRUE; + + /* By their nature, local .got entries cannot be merged. */ + if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE) + return FALSE; + + /* Failing the common trivial comparison, we must effectively + perform the merge. Not actually performing the merge means that + we don't have to store undo information in case we fail. */ + for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + { + struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub); + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr; + int i, n; + + n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be; + struct alpha_elf_link_hash_entry *h; + + h = hashes[i]; + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; + + for (be = h->got_entries; be ; be = be->next) + { + if (be->use_count == 0) + continue; + if (be->gotobj != b) + continue; + + for (ae = h->got_entries; ae ; ae = ae->next) + if (ae->gotobj == a + && ae->reloc_type == be->reloc_type + && ae->addend == be->addend) + goto global_found; + + total += alpha_got_entry_size (be->reloc_type); + if (total > MAX_GOT_SIZE) + return FALSE; + global_found:; + } + } + } + + return TRUE; +} + +/* Actually merge two .got tables. */ + +static void +elf64_alpha_merge_gots (bfd *a, bfd *b) +{ + int total = alpha_elf_tdata (a)->total_got_size; + bfd *bsub; + + /* Remember local expansion. */ + { + int e = alpha_elf_tdata (b)->local_got_size; + total += e; + alpha_elf_tdata (a)->local_got_size += e; + } + + for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next) + { + struct alpha_elf_got_entry **local_got_entries; + struct alpha_elf_link_hash_entry **hashes; + Elf_Internal_Shdr *symtab_hdr; + int i, n; + + /* Let the local .got entries know they are part of a new subsegment. */ + local_got_entries = alpha_elf_tdata (bsub)->local_got_entries; + if (local_got_entries) + { + n = elf_tdata (bsub)->symtab_hdr.sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ent; + for (ent = local_got_entries[i]; ent; ent = ent->next) + ent->gotobj = a; + } + } + + /* Merge the global .got entries. */ + hashes = alpha_elf_sym_hashes (bsub); + symtab_hdr = &elf_tdata (bsub)->symtab_hdr; + + n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info; + for (i = 0; i < n; ++i) + { + struct alpha_elf_got_entry *ae, *be, **pbe, **start; + struct alpha_elf_link_hash_entry *h; + + h = hashes[i]; + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; + + pbe = start = &h->got_entries; + while ((be = *pbe) != NULL) + { + if (be->use_count == 0) + { + *pbe = be->next; + memset (be, 0xa5, sizeof (*be)); + goto kill; + } + if (be->gotobj != b) + goto next; + + for (ae = *start; ae ; ae = ae->next) + if (ae->gotobj == a + && ae->reloc_type == be->reloc_type + && ae->addend == be->addend) + { + ae->flags |= be->flags; + ae->use_count += be->use_count; + *pbe = be->next; + memset (be, 0xa5, sizeof (*be)); + goto kill; + } + be->gotobj = a; + total += alpha_got_entry_size (be->reloc_type); + + next:; + pbe = &be->next; + kill:; + } + } + + alpha_elf_tdata (bsub)->gotobj = a; + } + alpha_elf_tdata (a)->total_got_size = total; + + /* Merge the two in_got chains. */ + { + bfd *next; + + bsub = a; + while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL) + bsub = next; + + alpha_elf_tdata (bsub)->in_got_link_next = b; + } +} + +/* Calculate the offsets for the got entries. */ + +static bfd_boolean +elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h, + void * arg ATTRIBUTE_UNUSED) +{ + struct alpha_elf_got_entry *gotent; + + for (gotent = h->got_entries; gotent; gotent = gotent->next) + if (gotent->use_count > 0) + { + struct alpha_elf_obj_tdata *td; + bfd_size_type *plge; + + td = alpha_elf_tdata (gotent->gotobj); + plge = &td->got->size; + gotent->got_offset = *plge; + *plge += alpha_got_entry_size (gotent->reloc_type); + } + + return TRUE; +} + +static void +elf64_alpha_calc_got_offsets (struct bfd_link_info *info) +{ + bfd *i, *got_list; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + got_list = htab->got_list; + + /* First, zero out the .got sizes, as we may be recalculating the + .got after optimizing it. */ + for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) + alpha_elf_tdata(i)->got->size = 0; + + /* Next, fill in the offsets for all the global entries. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_calc_got_offsets_for_symbol, + NULL); + + /* Finally, fill in the offsets for the local entries. */ + for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next) + { + bfd_size_type got_offset = alpha_elf_tdata(i)->got->size; + bfd *j; + + for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) + { + struct alpha_elf_got_entry **local_got_entries, *gotent; + int k, n; + + local_got_entries = alpha_elf_tdata(j)->local_got_entries; + if (!local_got_entries) + continue; + + for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) + for (gotent = local_got_entries[k]; gotent; gotent = gotent->next) + if (gotent->use_count > 0) + { + gotent->got_offset = got_offset; + got_offset += alpha_got_entry_size (gotent->reloc_type); + } + } + + alpha_elf_tdata(i)->got->size = got_offset; + } +} + +/* Constructs the gots. */ + +static bfd_boolean +elf64_alpha_size_got_sections (struct bfd_link_info *info) +{ + bfd *i, *got_list, *cur_got_obj = NULL; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; + got_list = htab->got_list; + + /* On the first time through, pretend we have an existing got list + consisting of all of the input files. */ + if (got_list == NULL) + { + for (i = info->input_bfds; i ; i = i->link_next) + { + bfd *this_got; + + if (! is_alpha_elf (i)) + continue; + + this_got = alpha_elf_tdata (i)->gotobj; + if (this_got == NULL) + continue; + + /* We are assuming no merging has yet occurred. */ + BFD_ASSERT (this_got == i); + + if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE) + { + /* Yikes! A single object file has too many entries. */ + (*_bfd_error_handler) + (_("%B: .got subsegment exceeds 64K (size %d)"), + i, alpha_elf_tdata (this_got)->total_got_size); + return FALSE; + } + + if (got_list == NULL) + got_list = this_got; + else + alpha_elf_tdata(cur_got_obj)->got_link_next = this_got; + cur_got_obj = this_got; + } + + /* Strange degenerate case of no got references. */ + if (got_list == NULL) + return TRUE; + + htab->got_list = got_list; + } + + cur_got_obj = got_list; + if (cur_got_obj == NULL) + return FALSE; + + i = alpha_elf_tdata(cur_got_obj)->got_link_next; + while (i != NULL) + { + if (elf64_alpha_can_merge_gots (cur_got_obj, i)) + { + elf64_alpha_merge_gots (cur_got_obj, i); + + alpha_elf_tdata(i)->got->size = 0; + i = alpha_elf_tdata(i)->got_link_next; + alpha_elf_tdata(cur_got_obj)->got_link_next = i; + } + else + { + cur_got_obj = i; + i = alpha_elf_tdata(i)->got_link_next; + } + } + + /* Once the gots have been merged, fill in the got offsets for + everything therein. */ + elf64_alpha_calc_got_offsets (info); + + return TRUE; +} + +static bfd_boolean +elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h, + void * data) +{ + asection *splt = (asection *) data; + struct alpha_elf_got_entry *gotent; + bfd_boolean saw_one = FALSE; + + /* If we didn't need an entry before, we still don't. */ + if (!h->root.needs_plt) + return TRUE; + + /* For each LITERAL got entry still in use, allocate a plt entry. */ + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + if (gotent->reloc_type == R_ALPHA_LITERAL + && gotent->use_count > 0) + { + if (splt->size == 0) + splt->size = PLT_HEADER_SIZE; + gotent->plt_offset = splt->size; + splt->size += PLT_ENTRY_SIZE; + saw_one = TRUE; + } + + /* If there weren't any, there's no longer a need for the PLT entry. */ + if (!saw_one) + h->root.needs_plt = FALSE; + + return TRUE; +} + +/* Called from relax_section to rebuild the PLT in light of potential changes + in the function's status. */ + +static void +elf64_alpha_size_plt_section (struct bfd_link_info *info) +{ + asection *splt, *spltrel, *sgotplt; + unsigned long entries; + bfd *dynobj; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + + dynobj = elf_hash_table(info)->dynobj; + splt = bfd_get_linker_section (dynobj, ".plt"); + if (splt == NULL) + return; + + splt->size = 0; + + alpha_elf_link_hash_traverse (htab, + elf64_alpha_size_plt_section_1, splt); + + /* Every plt entry requires a JMP_SLOT relocation. */ + spltrel = bfd_get_linker_section (dynobj, ".rela.plt"); + entries = 0; + if (splt->size) + { + if (elf64_alpha_use_secureplt) + entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE; + else + entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE; + } + spltrel->size = entries * sizeof (Elf64_External_Rela); + + /* When using the secureplt, we need two words somewhere in the data + segment for the dynamic linker to tell us where to go. This is the + entire contents of the .got.plt section. */ + if (elf64_alpha_use_secureplt) + { + sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); + sgotplt->size = entries ? 16 : 0; + } +} + +static bfd_boolean +elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + bfd *i; + struct alpha_elf_link_hash_table * htab; + + if (info->relocatable) + return TRUE; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + if (!elf64_alpha_size_got_sections (info)) + return FALSE; + + /* Allocate space for all of the .got subsections. */ + i = htab->got_list; + for ( ; i ; i = alpha_elf_tdata(i)->got_link_next) + { + asection *s = alpha_elf_tdata(i)->got; + if (s->size > 0) + { + s->contents = (bfd_byte *) bfd_zalloc (i, s->size); + if (s->contents == NULL) + return FALSE; + } + } + + return TRUE; +} + +/* The number of dynamic relocations required by a static relocation. */ + +static int +alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie) +{ + switch (r_type) + { + /* May appear in GOT entries. */ + case R_ALPHA_TLSGD: + return (dynamic ? 2 : shared ? 1 : 0); + case R_ALPHA_TLSLDM: + return shared; + case R_ALPHA_LITERAL: + return dynamic || shared; + case R_ALPHA_GOTTPREL: + return dynamic || (shared && !pie); + case R_ALPHA_GOTDTPREL: + return dynamic; + + /* May appear in data sections. */ + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + return dynamic || shared; + case R_ALPHA_TPREL64: + return dynamic || (shared && !pie); + + /* Everything else is illegal. We'll issue an error during + relocate_section. */ + default: + return 0; + } +} + +/* Work out the sizes of the dynamic relocation entries. */ + +static bfd_boolean +elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h, + struct bfd_link_info *info) +{ + bfd_boolean dynamic; + struct alpha_elf_reloc_entry *relent; + unsigned long entries; + + /* If the symbol was defined as a common symbol in a regular object + file, and there was no definition in any dynamic object, then the + linker will have allocated space for the symbol in a common + section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been + set. This is done for dynamic symbols in + elf_adjust_dynamic_symbol but this is not done for non-dynamic + symbols, somehow. */ + if (!h->root.def_regular + && h->root.ref_regular + && !h->root.def_dynamic + && (h->root.root.type == bfd_link_hash_defined + || h->root.root.type == bfd_link_hash_defweak) + && !(h->root.root.u.def.section->owner->flags & DYNAMIC)) + h->root.def_regular = 1; + + /* If the symbol is dynamic, we'll need all the relocations in their + natural form. If this is a shared object, and it has been forced + local, we'll need the same number of RELATIVE relocations. */ + dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); + + /* If the symbol is a hidden undefined weak, then we never have any + relocations. Avoid the loop which may want to add RELATIVE relocs + based on info->shared. */ + if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) + return TRUE; + + for (relent = h->reloc_entries; relent; relent = relent->next) + { + entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic, + info->shared, info->pie); + if (entries) + { + relent->srel->size += + entries * sizeof (Elf64_External_Rela) * relent->count; + if (relent->reltext) + info->flags |= DT_TEXTREL; + } + } + + return TRUE; +} + +/* Subroutine of elf64_alpha_size_rela_got_section for doing the + global symbols. */ + +static bfd_boolean +elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h, + struct bfd_link_info *info) +{ + bfd_boolean dynamic; + struct alpha_elf_got_entry *gotent; + unsigned long entries; + + /* If we're using a plt for this symbol, then all of its relocations + for its got entries go into .rela.plt. */ + if (h->root.needs_plt) + return TRUE; + + /* If the symbol is dynamic, we'll need all the relocations in their + natural form. If this is a shared object, and it has been forced + local, we'll need the same number of RELATIVE relocations. */ + dynamic = alpha_elf_dynamic_symbol_p (&h->root, info); + + /* If the symbol is a hidden undefined weak, then we never have any + relocations. Avoid the loop which may want to add RELATIVE relocs + based on info->shared. */ + if (h->root.root.type == bfd_link_hash_undefweak && !dynamic) + return TRUE; + + entries = 0; + for (gotent = h->got_entries; gotent ; gotent = gotent->next) + if (gotent->use_count > 0) + entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic, + info->shared, info->pie); + + if (entries > 0) + { + bfd *dynobj = elf_hash_table(info)->dynobj; + asection *srel = bfd_get_linker_section (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + srel->size += sizeof (Elf64_External_Rela) * entries; + } + + return TRUE; +} + +/* Set the sizes of the dynamic relocation sections. */ + +static void +elf64_alpha_size_rela_got_section (struct bfd_link_info *info) +{ + unsigned long entries; + bfd *i, *dynobj; + asection *srel; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return; + + /* Shared libraries often require RELATIVE relocs, and some relocs + require attention for the main application as well. */ + + entries = 0; + for (i = htab->got_list; + i ; i = alpha_elf_tdata(i)->got_link_next) + { + bfd *j; + + for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next) + { + struct alpha_elf_got_entry **local_got_entries, *gotent; + int k, n; + + local_got_entries = alpha_elf_tdata(j)->local_got_entries; + if (!local_got_entries) + continue; + + for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k) + for (gotent = local_got_entries[k]; + gotent ; gotent = gotent->next) + if (gotent->use_count > 0) + entries += (alpha_dynamic_entries_for_reloc + (gotent->reloc_type, 0, info->shared, info->pie)); + } + } + + dynobj = elf_hash_table(info)->dynobj; + srel = bfd_get_linker_section (dynobj, ".rela.got"); + if (!srel) + { + BFD_ASSERT (entries == 0); + return; + } + srel->size = sizeof (Elf64_External_Rela) * entries; + + /* Now do the non-local symbols. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_size_rela_got_1, info); +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + bfd *dynobj; + asection *s; + bfd_boolean relplt; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + dynobj = elf_hash_table(info)->dynobj; + BFD_ASSERT(dynobj != NULL); + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (info->executable) + { + s = bfd_get_linker_section (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + + /* Now that we've seen all of the input files, we can decide which + symbols need dynamic relocation entries and which don't. We've + collected information in check_relocs that we can now apply to + size the dynamic relocation sections. */ + alpha_elf_link_hash_traverse (htab, + elf64_alpha_calc_dynrel_sizes, info); + + elf64_alpha_size_rela_got_section (info); + elf64_alpha_size_plt_section (info); + } + /* else we're not dynamic and by definition we don't need such things. */ + + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + relplt = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; + + if (!(s->flags & SEC_LINKER_CREATED)) + continue; + + /* It's OK to base decisions on the section name, because none + of the dynobj section names depend upon the input files. */ + name = bfd_get_section_name (dynobj, s); + + if (CONST_STRNEQ (name, ".rela")) + { + if (s->size != 0) + { + if (strcmp (name, ".rela.plt") == 0) + relplt = TRUE; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + } + else if (! CONST_STRNEQ (name, ".got") + && strcmp (name, ".plt") != 0 + && strcmp (name, ".dynbss") != 0) + { + /* It's not one of our dynamic sections, so don't allocate space. */ + continue; + } + + if (s->size == 0) + { + /* If we don't need this section, strip it from the output file. + This is to handle .rela.bss and .rela.plt. We must create it + in create_dynamic_sections, because it must be created before + the linker maps input sections to output sections. The + linker does that before adjust_dynamic_symbol is called, and + it is that function which decides whether anything needs to + go into these sections. */ + if (!CONST_STRNEQ (name, ".got")) + s->flags |= SEC_EXCLUDE; + } + else if ((s->flags & SEC_HAS_CONTENTS) != 0) + { + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf64_alpha_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (relplt) + { + if (!add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; + + if (elf64_alpha_use_secureplt + && !add_dynamic_entry (DT_ALPHA_PLTRO, 1)) + return FALSE; + } + + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) + return FALSE; + + if (info->flags & DF_TEXTREL) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } +#undef add_dynamic_entry + + return TRUE; +} + +/* These functions do relaxation for Alpha ELF. + + Currently I'm only handling what I can do with existing compiler + and assembler support, which means no instructions are removed, + though some may be nopped. At this time GCC does not emit enough + information to do all of the relaxing that is possible. It will + take some not small amount of work for that to happen. + + There are a couple of interesting papers that I once read on this + subject, that I cannot find references to at the moment, that + related to Alpha in particular. They are by David Wall, then of + DEC WRL. */ + +struct alpha_relax_info +{ + bfd *abfd; + asection *sec; + bfd_byte *contents; + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *relocs, *relend; + struct bfd_link_info *link_info; + bfd_vma gp; + bfd *gotobj; + asection *tsec; + struct alpha_elf_link_hash_entry *h; + struct alpha_elf_got_entry **first_gotent; + struct alpha_elf_got_entry *gotent; + bfd_boolean changed_contents; + bfd_boolean changed_relocs; + unsigned char other; +}; + +static Elf_Internal_Rela * +elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel, + Elf_Internal_Rela *relend, + bfd_vma offset, int type) +{ + while (rel < relend) + { + if (rel->r_offset == offset + && ELF64_R_TYPE (rel->r_info) == (unsigned int) type) + return rel; + ++rel; + } + return NULL; +} + +static bfd_boolean +elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval, + Elf_Internal_Rela *irel, unsigned long r_type) +{ + unsigned int insn; + bfd_signed_vma disp; + + /* Get the instruction. */ + insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); + + if (insn >> 26 != OP_LDQ) + { + reloc_howto_type *howto = elf64_alpha_howto_table + r_type; + ((*_bfd_error_handler) + ("%B: %A+0x%lx: warning: %s relocation against unexpected insn", + info->abfd, info->sec, + (unsigned long) irel->r_offset, howto->name)); + return TRUE; + } + + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; + + /* Can't use local-exec relocations in shared libraries. */ + if (r_type == R_ALPHA_GOTTPREL + && (info->link_info->shared && !info->link_info->pie)) + return TRUE; + + if (r_type == R_ALPHA_LITERAL) + { + /* Look for nice constant addresses. This includes the not-uncommon + special case of 0 for undefweak symbols. */ + if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak) + || (!info->link_info->shared + && (symval >= (bfd_vma)-0x8000 || symval < 0x8000))) + { + disp = 0; + insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); + insn |= (symval & 0xffff); + r_type = R_ALPHA_NONE; + } + else + { + disp = symval - info->gp; + insn = (OP_LDA << 26) | (insn & 0x03ff0000); + r_type = R_ALPHA_GPREL16; + } + } + else + { + bfd_vma dtp_base, tp_base; + + BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); + dtp_base = alpha_get_dtprel_base (info->link_info); + tp_base = alpha_get_tprel_base (info->link_info); + disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base); + + insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16); + + switch (r_type) + { + case R_ALPHA_GOTDTPREL: + r_type = R_ALPHA_DTPREL16; + break; + case R_ALPHA_GOTTPREL: + r_type = R_ALPHA_TPREL16; + break; + default: + BFD_ASSERT (0); + return FALSE; + } + } + + if (disp < -0x8000 || disp >= 0x8000) + return TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset); + info->changed_contents = TRUE; + + /* Reduce the use count on this got entry by one, possibly + eliminating it. */ + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (r_type); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* Smash the existing GOT relocation for its 16-bit immediate pair. */ + irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type); + info->changed_relocs = TRUE; + + /* ??? Search forward through this basic block looking for insns + that use the target register. Stop after an insn modifying the + register is seen, or after a branch or call. + + Any such memory load insn may be substituted by a load directly + off the GP. This allows the memory load insn to be issued before + the calculated GP register would otherwise be ready. + + Any such jsr insn can be replaced by a bsr if it is in range. + + This would mean that we'd have to _add_ relocations, the pain of + which gives one pause. */ + + return TRUE; +} + +static bfd_vma +elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval) +{ + /* If the function has the same gp, and we can identify that the + function does not use its function pointer, we can eliminate the + address load. */ + + /* If the symbol is marked NOPV, we are being told the function never + needs its procedure value. */ + if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV) + return symval; + + /* If the symbol is marked STD_GP, we are being told the function does + a normal ldgp in the first two words. */ + else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD) + ; + + /* Otherwise, we may be able to identify a GP load in the first two + words, which we can then skip. */ + else + { + Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp; + bfd_vma ofs; + + /* Load the relocations from the section that the target symbol is in. */ + if (info->sec == info->tsec) + { + tsec_relocs = info->relocs; + tsec_relend = info->relend; + tsec_free = NULL; + } + else + { + tsec_relocs = (_bfd_elf_link_read_relocs + (info->abfd, info->tsec, NULL, + (Elf_Internal_Rela *) NULL, + info->link_info->keep_memory)); + if (tsec_relocs == NULL) + return 0; + tsec_relend = tsec_relocs + info->tsec->reloc_count; + tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs); + } + + /* Recover the symbol's offset within the section. */ + ofs = (symval - info->tsec->output_section->vma + - info->tsec->output_offset); + + /* Look for a GPDISP reloc. */ + gpdisp = (elf64_alpha_find_reloc_at_ofs + (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP)); + + if (!gpdisp || gpdisp->r_addend != 4) + { + if (tsec_free) + free (tsec_free); + return 0; + } + if (tsec_free) + free (tsec_free); + } + + /* We've now determined that we can skip an initial gp load. Verify + that the call and the target use the same gp. */ + if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec + || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj) + return 0; + + return symval + 8; +} + +static bfd_boolean +elf64_alpha_relax_with_lituse (struct alpha_relax_info *info, + bfd_vma symval, Elf_Internal_Rela *irel) +{ + Elf_Internal_Rela *urel, *irelend = info->relend; + int flags, count, i; + bfd_signed_vma disp; + bfd_boolean fits16; + bfd_boolean fits32; + bfd_boolean lit_reused = FALSE; + bfd_boolean all_optimized = TRUE; + unsigned int lit_insn; + + lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset); + if (lit_insn >> 26 != OP_LDQ) + { + ((*_bfd_error_handler) + ("%B: %A+0x%lx: warning: LITERAL relocation against unexpected insn", + info->abfd, info->sec, + (unsigned long) irel->r_offset)); + return TRUE; + } + + /* Can't relax dynamic symbols. */ + if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info)) + return TRUE; + + /* Summarize how this particular LITERAL is used. */ + for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count) + { + if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE) + break; + if (urel->r_addend <= 6) + flags |= 1 << urel->r_addend; + } + + /* A little preparation for the loop... */ + disp = symval - info->gp; + + for (urel = irel+1, i = 0; i < count; ++i, ++urel) + { + unsigned int insn; + int insn_disp; + bfd_signed_vma xdisp; + + insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset); + + switch (urel->r_addend) + { + case LITUSE_ALPHA_ADDR: + default: + /* This type is really just a placeholder to note that all + uses cannot be optimized, but to still allow some. */ + all_optimized = FALSE; + break; + + case LITUSE_ALPHA_BASE: + /* We can always optimize 16-bit displacements. */ + + /* Extract the displacement from the instruction, sign-extending + it if necessary, then test whether it is within 16 or 32 bits + displacement from GP. */ + insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000; + + xdisp = disp + insn_disp; + fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000); + fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000 + && xdisp < 0x7fff8000); + + if (fits16) + { + /* Take the op code and dest from this insn, take the base + register from the literal insn. Leave the offset alone. */ + insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000); + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPREL16); + urel->r_addend = irel->r_addend; + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + info->changed_contents = TRUE; + } + + /* If all mem+byte, we can optimize 32-bit mem displacements. */ + else if (fits32 && !(flags & ~6)) + { + /* FIXME: sanity check that lit insn Ra is mem insn Rb. */ + + irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPRELHIGH); + lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000); + bfd_put_32 (info->abfd, (bfd_vma) lit_insn, + info->contents + irel->r_offset); + lit_reused = TRUE; + info->changed_contents = TRUE; + + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_GPRELLOW); + urel->r_addend = irel->r_addend; + info->changed_relocs = TRUE; + } + else + all_optimized = FALSE; + break; + + case LITUSE_ALPHA_BYTOFF: + /* We can always optimize byte instructions. */ + + /* FIXME: sanity check the insn for byte op. Check that the + literal dest reg is indeed Rb in the byte insn. */ + + insn &= ~ (unsigned) 0x001ff000; + insn |= ((symval & 7) << 13) | 0x1000; + + urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + urel->r_addend = 0; + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + info->changed_contents = TRUE; + break; + + case LITUSE_ALPHA_JSR: + case LITUSE_ALPHA_TLSGD: + case LITUSE_ALPHA_TLSLDM: + case LITUSE_ALPHA_JSRDIRECT: + { + bfd_vma optdest, org; + bfd_signed_vma odisp; + + /* For undefined weak symbols, we're mostly interested in getting + rid of the got entry whenever possible, so optimize this to a + use of the zero register. */ + if (info->h && info->h->root.root.type == bfd_link_hash_undefweak) + { + insn |= 31 << 16; + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + + info->changed_contents = TRUE; + break; + } + + /* If not zero, place to jump without needing pv. */ + optdest = elf64_alpha_relax_opt_call (info, symval); + org = (info->sec->output_section->vma + + info->sec->output_offset + + urel->r_offset + 4); + odisp = (optdest ? optdest : symval) - org; + + if (odisp >= -0x400000 && odisp < 0x400000) + { + Elf_Internal_Rela *xrel; + + /* Preserve branch prediction call stack when possible. */ + if ((insn & INSN_JSR_MASK) == INSN_JSR) + insn = (OP_BSR << 26) | (insn & 0x03e00000); + else + insn = (OP_BR << 26) | (insn & 0x03e00000); + + urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), + R_ALPHA_BRADDR); + urel->r_addend = irel->r_addend; + + if (optdest) + urel->r_addend += optdest - symval; + else + all_optimized = FALSE; + + bfd_put_32 (info->abfd, (bfd_vma) insn, + info->contents + urel->r_offset); + + /* Kill any HINT reloc that might exist for this insn. */ + xrel = (elf64_alpha_find_reloc_at_ofs + (info->relocs, info->relend, urel->r_offset, + R_ALPHA_HINT)); + if (xrel) + xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + } + else + all_optimized = FALSE; + + /* Even if the target is not in range for a direct branch, + if we share a GP, we can eliminate the gp reload. */ + if (optdest) + { + Elf_Internal_Rela *gpdisp + = (elf64_alpha_find_reloc_at_ofs + (info->relocs, irelend, urel->r_offset + 4, + R_ALPHA_GPDISP)); + if (gpdisp) + { + bfd_byte *p_ldah = info->contents + gpdisp->r_offset; + bfd_byte *p_lda = p_ldah + gpdisp->r_addend; + unsigned int ldah = bfd_get_32 (info->abfd, p_ldah); + unsigned int lda = bfd_get_32 (info->abfd, p_lda); + + /* Verify that the instruction is "ldah $29,0($26)". + Consider a function that ends in a noreturn call, + and that the next function begins with an ldgp, + and that by accident there is no padding between. + In that case the insn would use $27 as the base. */ + if (ldah == 0x27ba0000 && lda == 0x23bd0000) + { + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda); + + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + } + } + } + } + break; + } + } + + /* If all cases were optimized, we can reduce the use count on this + got entry by one, possibly eliminating it. */ + if (all_optimized) + { + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (R_ALPHA_LITERAL); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* If the literal instruction is no longer needed (it may have been + reused. We can eliminate it. */ + /* ??? For now, I don't want to deal with compacting the section, + so just nop it out. */ + if (!lit_reused) + { + irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + info->changed_relocs = TRUE; + + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, + info->contents + irel->r_offset); + info->changed_contents = TRUE; + } + + return TRUE; + } + else + return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL); +} + +static bfd_boolean +elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval, + Elf_Internal_Rela *irel, bfd_boolean is_gd) +{ + bfd_byte *pos[5]; + unsigned int insn, tlsgd_reg; + Elf_Internal_Rela *gpdisp, *hint; + bfd_boolean dynamic, use_gottprel; + unsigned long new_symndx; + + dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info); + + /* If a TLS symbol is accessed using IE at least once, there is no point + to use dynamic model for it. */ + if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE)) + ; + + /* If the symbol is local, and we've already committed to DF_STATIC_TLS, + then we might as well relax to IE. */ + else if (info->link_info->shared && !dynamic + && (info->link_info->flags & DF_STATIC_TLS)) + ; + + /* Otherwise we must be building an executable to do anything. */ + else if (info->link_info->shared) + return TRUE; + + /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and + the matching LITUSE_TLS relocations. */ + if (irel + 2 >= info->relend) + return TRUE; + if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL + || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE + || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM)) + return TRUE; + + /* There must be a GPDISP relocation positioned immediately after the + LITUSE relocation. */ + gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, + irel[2].r_offset + 4, R_ALPHA_GPDISP); + if (!gpdisp) + return TRUE; + + pos[0] = info->contents + irel[0].r_offset; + pos[1] = info->contents + irel[1].r_offset; + pos[2] = info->contents + irel[2].r_offset; + pos[3] = info->contents + gpdisp->r_offset; + pos[4] = pos[3] + gpdisp->r_addend; + + /* Beware of the compiler hoisting part of the sequence out a loop + and adjusting the destination register for the TLSGD insn. If this + happens, there will be a move into $16 before the JSR insn, so only + transformations of the first insn pair should use this register. */ + tlsgd_reg = bfd_get_32 (info->abfd, pos[0]); + tlsgd_reg = (tlsgd_reg >> 21) & 31; + + /* Generally, the positions are not allowed to be out of order, lest the + modified insn sequence have different register lifetimes. We can make + an exception when pos 1 is adjacent to pos 0. */ + if (pos[1] + 4 == pos[0]) + { + bfd_byte *tmp = pos[0]; + pos[0] = pos[1]; + pos[1] = tmp; + } + if (pos[1] >= pos[2] || pos[2] >= pos[3]) + return TRUE; + + /* Reduce the use count on the LITERAL relocation. Do this before we + smash the symndx when we adjust the relocations below. */ + { + struct alpha_elf_got_entry *lit_gotent; + struct alpha_elf_link_hash_entry *lit_h; + unsigned long indx; + + BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info); + indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info; + lit_h = alpha_elf_sym_hashes (info->abfd)[indx]; + + while (lit_h->root.root.type == bfd_link_hash_indirect + || lit_h->root.root.type == bfd_link_hash_warning) + lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link; + + for (lit_gotent = lit_h->got_entries; lit_gotent ; + lit_gotent = lit_gotent->next) + if (lit_gotent->gotobj == info->gotobj + && lit_gotent->reloc_type == R_ALPHA_LITERAL + && lit_gotent->addend == irel[1].r_addend) + break; + BFD_ASSERT (lit_gotent); + + if (--lit_gotent->use_count == 0) + { + int sz = alpha_got_entry_size (R_ALPHA_LITERAL); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + } + } + + /* Change + + lda $16,x($gp) !tlsgd!1 + ldq $27,__tls_get_addr($gp) !literal!1 + jsr $26,($27),__tls_get_addr !lituse_tlsgd!1 + ldah $29,0($26) !gpdisp!2 + lda $29,0($29) !gpdisp!2 + to + ldq $16,x($gp) !gottprel + unop + call_pal rduniq + addq $16,$0,$0 + unop + or the first pair to + lda $16,x($gp) !tprel + unop + or + ldah $16,x($gp) !tprelhi + lda $16,x($16) !tprello + + as appropriate. */ + + use_gottprel = FALSE; + new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF; + + /* Some compilers warn about a Boolean-looking expression being + used in a switch. The explicit cast silences them. */ + switch ((int) (!dynamic && !info->link_info->shared)) + { + case 1: + { + bfd_vma tp_base; + bfd_signed_vma disp; + + BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL); + tp_base = alpha_get_tprel_base (info->link_info); + disp = symval - tp_base; + + if (disp >= -0x8000 && disp < 0x8000) + { + insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16); + irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + break; + } + else if (disp >= -(bfd_signed_vma) 0x80000000 + && disp < (bfd_signed_vma) 0x7fff8000 + && pos[0] + 4 == pos[1]) + { + insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI); + irel[1].r_offset = pos[1] - info->contents; + irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO); + break; + } + } + /* FALLTHRU */ + + default: + use_gottprel = TRUE; + + insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]); + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]); + + irel[0].r_offset = pos[0] - info->contents; + irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL); + irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + break; + } + + bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]); + + insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0); + bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]); + + bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]); + + irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend, + irel[2].r_offset, R_ALPHA_HINT); + if (hint) + hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE); + + info->changed_contents = TRUE; + info->changed_relocs = TRUE; + + /* Reduce the use count on the TLSGD/TLSLDM relocation. */ + if (--info->gotent->use_count == 0) + { + int sz = alpha_got_entry_size (info->gotent->reloc_type); + alpha_elf_tdata (info->gotobj)->total_got_size -= sz; + if (!info->h) + alpha_elf_tdata (info->gotobj)->local_got_size -= sz; + } + + /* If we've switched to a GOTTPREL relocation, increment the reference + count on that got entry. */ + if (use_gottprel) + { + struct alpha_elf_got_entry *tprel_gotent; + + for (tprel_gotent = *info->first_gotent; tprel_gotent ; + tprel_gotent = tprel_gotent->next) + if (tprel_gotent->gotobj == info->gotobj + && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL + && tprel_gotent->addend == irel->r_addend) + break; + if (tprel_gotent) + tprel_gotent->use_count++; + else + { + if (info->gotent->use_count == 0) + tprel_gotent = info->gotent; + else + { + tprel_gotent = (struct alpha_elf_got_entry *) + bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry)); + if (!tprel_gotent) + return FALSE; + + tprel_gotent->next = *info->first_gotent; + *info->first_gotent = tprel_gotent; + + tprel_gotent->gotobj = info->gotobj; + tprel_gotent->addend = irel->r_addend; + tprel_gotent->got_offset = -1; + tprel_gotent->reloc_done = 0; + tprel_gotent->reloc_xlated = 0; + } + + tprel_gotent->use_count = 1; + tprel_gotent->reloc_type = R_ALPHA_GOTTPREL; + } + } + + return TRUE; +} + +static bfd_boolean +elf64_alpha_relax_section (bfd *abfd, asection *sec, + struct bfd_link_info *link_info, bfd_boolean *again) +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *internal_relocs; + Elf_Internal_Rela *irel, *irelend; + Elf_Internal_Sym *isymbuf = NULL; + struct alpha_elf_got_entry **local_got_entries; + struct alpha_relax_info info; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (link_info); + if (htab == NULL) + return FALSE; + + /* There's nothing to change, yet. */ + *again = FALSE; + + if (link_info->relocatable + || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + != (SEC_CODE | SEC_RELOC | SEC_ALLOC)) + || sec->reloc_count == 0) + return TRUE; + + BFD_ASSERT (is_alpha_elf (abfd)); + + /* Make sure our GOT and PLT tables are up-to-date. */ + if (htab->relax_trip != link_info->relax_trip) + { + htab->relax_trip = link_info->relax_trip; + + /* This should never fail after the initial round, since the only + error is GOT overflow, and relaxation only shrinks the table. */ + if (!elf64_alpha_size_got_sections (link_info)) + abort (); + if (elf_hash_table (link_info)->dynamic_sections_created) + { + elf64_alpha_size_plt_section (link_info); + elf64_alpha_size_rela_got_section (link_info); + } + } + + symtab_hdr = &elf_symtab_hdr (abfd); + local_got_entries = alpha_elf_tdata(abfd)->local_got_entries; + + /* Load the relocations for this section. */ + internal_relocs = (_bfd_elf_link_read_relocs + (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, + link_info->keep_memory)); + if (internal_relocs == NULL) + return FALSE; + + memset(&info, 0, sizeof (info)); + info.abfd = abfd; + info.sec = sec; + info.link_info = link_info; + info.symtab_hdr = symtab_hdr; + info.relocs = internal_relocs; + info.relend = irelend = internal_relocs + sec->reloc_count; + + /* Find the GP for this object. Do not store the result back via + _bfd_set_gp_value, since this could change again before final. */ + info.gotobj = alpha_elf_tdata (abfd)->gotobj; + if (info.gotobj) + { + asection *sgot = alpha_elf_tdata (info.gotobj)->got; + info.gp = (sgot->output_section->vma + + sgot->output_offset + + 0x8000); + } + + /* Get the section contents. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + info.contents = elf_section_data (sec)->this_hdr.contents; + else + { + if (!bfd_malloc_and_get_section (abfd, sec, &info.contents)) + goto error_return; + } + + for (irel = internal_relocs; irel < irelend; irel++) + { + bfd_vma symval; + struct alpha_elf_got_entry *gotent; + unsigned long r_type = ELF64_R_TYPE (irel->r_info); + unsigned long r_symndx = ELF64_R_SYM (irel->r_info); + + /* Early exit for unhandled or unrelaxable relocations. */ + switch (r_type) + { + case R_ALPHA_LITERAL: + case R_ALPHA_GPRELHIGH: + case R_ALPHA_GPRELLOW: + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + case R_ALPHA_TLSGD: + break; + + case R_ALPHA_TLSLDM: + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the STN_UNDEF (0) symbol so that they all match. */ + r_symndx = STN_UNDEF; + break; + + default: + continue; + } + + /* Get the value of the symbol referred to by the reloc. */ + if (r_symndx < symtab_hdr->sh_info) + { + /* A local symbol. */ + Elf_Internal_Sym *isym; + + /* Read this BFD's local symbols. */ + if (isymbuf == NULL) + { + isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; + if (isymbuf == NULL) + isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, + symtab_hdr->sh_info, 0, + NULL, NULL, NULL); + if (isymbuf == NULL) + goto error_return; + } + + isym = isymbuf + r_symndx; + + /* Given the symbol for a TLSLDM reloc is ignored, this also + means forcing the symbol value to the tp base. */ + if (r_type == R_ALPHA_TLSLDM) + { + info.tsec = bfd_abs_section_ptr; + symval = alpha_get_tprel_base (info.link_info); + } + else + { + symval = isym->st_value; + if (isym->st_shndx == SHN_UNDEF) + continue; + else if (isym->st_shndx == SHN_ABS) + info.tsec = bfd_abs_section_ptr; + else if (isym->st_shndx == SHN_COMMON) + info.tsec = bfd_com_section_ptr; + else + info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); + } + + info.h = NULL; + info.other = isym->st_other; + if (local_got_entries) + info.first_gotent = &local_got_entries[r_symndx]; + else + { + info.first_gotent = &info.gotent; + info.gotent = NULL; + } + } + else + { + unsigned long indx; + struct alpha_elf_link_hash_entry *h; + + indx = r_symndx - symtab_hdr->sh_info; + h = alpha_elf_sym_hashes (abfd)[indx]; + BFD_ASSERT (h != NULL); + + while (h->root.root.type == bfd_link_hash_indirect + || h->root.root.type == bfd_link_hash_warning) + h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link; + + /* If the symbol is undefined, we can't do anything with it. */ + if (h->root.root.type == bfd_link_hash_undefined) + continue; + + /* If the symbol isn't defined in the current module, + again we can't do anything. */ + if (h->root.root.type == bfd_link_hash_undefweak) + { + info.tsec = bfd_abs_section_ptr; + symval = 0; + } + else if (!h->root.def_regular) + { + /* Except for TLSGD relocs, which can sometimes be + relaxed to GOTTPREL relocs. */ + if (r_type != R_ALPHA_TLSGD) + continue; + info.tsec = bfd_abs_section_ptr; + symval = 0; + } + else + { + info.tsec = h->root.root.u.def.section; + symval = h->root.root.u.def.value; + } + + info.h = h; + info.other = h->root.other; + info.first_gotent = &h->got_entries; + } + + /* Search for the got entry to be used by this relocation. */ + for (gotent = *info.first_gotent; gotent ; gotent = gotent->next) + if (gotent->gotobj == info.gotobj + && gotent->reloc_type == r_type + && gotent->addend == irel->r_addend) + break; + info.gotent = gotent; + + symval += info.tsec->output_section->vma + info.tsec->output_offset; + symval += irel->r_addend; + + switch (r_type) + { + case R_ALPHA_LITERAL: + BFD_ASSERT(info.gotent != NULL); + + /* If there exist LITUSE relocations immediately following, this + opens up all sorts of interesting optimizations, because we + now know every location that this address load is used. */ + if (irel+1 < irelend + && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE) + { + if (!elf64_alpha_relax_with_lituse (&info, symval, irel)) + goto error_return; + } + else + { + if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) + goto error_return; + } + break; + + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + BFD_ASSERT(info.gotent != NULL); + if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type)) + goto error_return; + break; + + case R_ALPHA_TLSGD: + case R_ALPHA_TLSLDM: + BFD_ASSERT(info.gotent != NULL); + if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel, + r_type == R_ALPHA_TLSGD)) + goto error_return; + break; + } + } + + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + { + if (!link_info->keep_memory) + free (isymbuf); + else + { + /* Cache the symbols for elf_link_input_bfd. */ + symtab_hdr->contents = (unsigned char *) isymbuf; + } + } + + if (info.contents != NULL + && elf_section_data (sec)->this_hdr.contents != info.contents) + { + if (!info.changed_contents && !link_info->keep_memory) + free (info.contents); + else + { + /* Cache the section contents for elf_link_input_bfd. */ + elf_section_data (sec)->this_hdr.contents = info.contents; + } + } + + if (elf_section_data (sec)->relocs != internal_relocs) + { + if (!info.changed_relocs) + free (internal_relocs); + else + elf_section_data (sec)->relocs = internal_relocs; + } + + *again = info.changed_contents || info.changed_relocs; + + return TRUE; + + error_return: + if (isymbuf != NULL + && symtab_hdr->contents != (unsigned char *) isymbuf) + free (isymbuf); + if (info.contents != NULL + && elf_section_data (sec)->this_hdr.contents != info.contents) + free (info.contents); + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + return FALSE; +} + +/* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET) + into the next available slot in SREL. */ + +static void +elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info, + asection *sec, asection *srel, bfd_vma offset, + long dynindx, long rtype, bfd_vma addend) +{ + Elf_Internal_Rela outrel; + bfd_byte *loc; + + BFD_ASSERT (srel != NULL); + + outrel.r_info = ELF64_R_INFO (dynindx, rtype); + outrel.r_addend = addend; + + offset = _bfd_elf_section_offset (abfd, info, sec, offset); + if ((offset | 1) != (bfd_vma) -1) + outrel.r_offset = sec->output_section->vma + sec->output_offset + offset; + else + memset (&outrel, 0, sizeof (outrel)); + + loc = srel->contents; + loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (abfd, &outrel, loc); + BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size); +} + +/* Relocate an Alpha ELF section for a relocatable link. + + We don't have to change anything unless the reloc is against a section + symbol, in which case we have to adjust according to where the section + symbol winds up in the output section. */ + +static bfd_boolean +elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + bfd *input_bfd, asection *input_section, + bfd_byte *contents ATTRIBUTE_UNUSED, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) +{ + unsigned long symtab_hdr_sh_info; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + struct elf_link_hash_entry **sym_hashes; + bfd_boolean ret_val = TRUE; + + symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info; + sym_hashes = elf_sym_hashes (input_bfd); + + relend = relocs + input_section->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + Elf_Internal_Sym *sym; + asection *sec; + unsigned long r_type; + + r_type = ELF64_R_TYPE (rel->r_info); + if (r_type >= R_ALPHA_max) + { + (*_bfd_error_handler) + (_("%B: unknown relocation type %d"), + input_bfd, (int) r_type); + bfd_set_error (bfd_error_bad_value); + ret_val = FALSE; + continue; + } + + /* The symbol associated with GPDISP and LITUSE is + immaterial. Only the addend is significant. */ + if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE) + continue; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr_sh_info) + { + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + } + else + { + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr_sh_info]; + + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + continue; + + sym = NULL; + sec = h->root.u.def.section; + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, + elf64_alpha_howto_table + r_type, 0, + contents); + + if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) + rel->r_addend += sec->output_offset; + } + + return ret_val; +} + +/* Relocate an Alpha ELF section. */ + +static bfd_boolean +elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info, + bfd *input_bfd, asection *input_section, + bfd_byte *contents, Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + asection *sgot, *srel, *srelgot; + bfd *dynobj, *gotobj; + bfd_vma gp, tp_base, dtp_base; + struct alpha_elf_got_entry **local_got_entries; + bfd_boolean ret_val; + + BFD_ASSERT (is_alpha_elf (input_bfd)); + + /* Handle relocatable links with a smaller loop. */ + if (info->relocatable) + return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, + input_section, contents, relocs, + local_syms, local_sections); + + /* This is a final link. */ + + ret_val = TRUE; + + symtab_hdr = &elf_symtab_hdr (input_bfd); + + dynobj = elf_hash_table (info)->dynobj; + if (dynobj) + srelgot = bfd_get_linker_section (dynobj, ".rela.got"); + else + srelgot = NULL; + + if (input_section->flags & SEC_ALLOC) + { + const char *section_name; + section_name = (bfd_elf_string_from_elf_section + (input_bfd, elf_elfheader(input_bfd)->e_shstrndx, + _bfd_elf_single_rel_hdr (input_section)->sh_name)); + BFD_ASSERT(section_name != NULL); + srel = bfd_get_linker_section (dynobj, section_name); + } + else + srel = NULL; + + /* Find the gp value for this input bfd. */ + gotobj = alpha_elf_tdata (input_bfd)->gotobj; + if (gotobj) + { + sgot = alpha_elf_tdata (gotobj)->got; + gp = _bfd_get_gp_value (gotobj); + if (gp == 0) + { + gp = (sgot->output_section->vma + + sgot->output_offset + + 0x8000); + _bfd_set_gp_value (gotobj, gp); + } + } + else + { + sgot = NULL; + gp = 0; + } + + local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries; + + if (elf_hash_table (info)->tls_sec != NULL) + { + dtp_base = alpha_get_dtprel_base (info); + tp_base = alpha_get_tprel_base (info); + } + else + dtp_base = tp_base = 0; + + relend = relocs + input_section->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + struct alpha_elf_link_hash_entry *h = NULL; + struct alpha_elf_got_entry *gotent; + bfd_reloc_status_type r; + reloc_howto_type *howto; + unsigned long r_symndx; + Elf_Internal_Sym *sym = NULL; + asection *sec = NULL; + bfd_vma value; + bfd_vma addend; + bfd_boolean dynamic_symbol_p; + bfd_boolean unresolved_reloc = FALSE; + bfd_boolean undef_weak_ref = FALSE; + unsigned long r_type; + + r_type = ELF64_R_TYPE(rel->r_info); + if (r_type >= R_ALPHA_max) + { + (*_bfd_error_handler) + (_("%B: unknown relocation type %d"), + input_bfd, (int) r_type); + bfd_set_error (bfd_error_bad_value); + ret_val = FALSE; + continue; + } + + howto = elf64_alpha_howto_table + r_type; + r_symndx = ELF64_R_SYM(rel->r_info); + + /* The symbol for a TLSLDM reloc is ignored. Collapse the + reloc to the STN_UNDEF (0) symbol so that they all match. */ + if (r_type == R_ALPHA_TLSLDM) + r_symndx = STN_UNDEF; + + if (r_symndx < symtab_hdr->sh_info) + { + asection *msec; + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + msec = sec; + value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); + + /* If this is a tp-relative relocation against sym STN_UNDEF (0), + this is hackery from relax_section. Force the value to + be the tls module base. */ + if (r_symndx == STN_UNDEF + && (r_type == R_ALPHA_TLSLDM + || r_type == R_ALPHA_GOTTPREL + || r_type == R_ALPHA_TPREL64 + || r_type == R_ALPHA_TPRELHI + || r_type == R_ALPHA_TPRELLO + || r_type == R_ALPHA_TPREL16)) + value = dtp_base; + + if (local_got_entries) + gotent = local_got_entries[r_symndx]; + else + gotent = NULL; + + /* Need to adjust local GOT entries' addends for SEC_MERGE + unless it has been done already. */ + if ((sec->flags & SEC_MERGE) + && ELF_ST_TYPE (sym->st_info) == STT_SECTION + && sec->sec_info_type == SEC_INFO_TYPE_MERGE + && gotent + && !gotent->reloc_xlated) + { + struct alpha_elf_got_entry *ent; + + for (ent = gotent; ent; ent = ent->next) + { + ent->reloc_xlated = 1; + if (ent->use_count == 0) + continue; + msec = sec; + ent->addend = + _bfd_merged_section_offset (output_bfd, &msec, + elf_section_data (sec)-> + sec_info, + sym->st_value + ent->addend); + ent->addend -= sym->st_value; + ent->addend += msec->output_section->vma + + msec->output_offset + - sec->output_section->vma + - sec->output_offset; + } + } + + dynamic_symbol_p = FALSE; + } + else + { + bfd_boolean warned; + struct elf_link_hash_entry *hh; + struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + hh, sec, value, + unresolved_reloc, warned); + + if (warned) + continue; + + if (value == 0 + && ! unresolved_reloc + && hh->root.type == bfd_link_hash_undefweak) + undef_weak_ref = TRUE; + + h = (struct alpha_elf_link_hash_entry *) hh; + dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info); + gotent = h->got_entries; + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + addend = rel->r_addend; + value += addend; + + /* Search for the proper got entry. */ + for (; gotent ; gotent = gotent->next) + if (gotent->gotobj == gotobj + && gotent->reloc_type == r_type + && gotent->addend == addend) + break; + + switch (r_type) + { + case R_ALPHA_GPDISP: + { + bfd_byte *p_ldah, *p_lda; + + BFD_ASSERT(gp != 0); + + value = (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + p_ldah = contents + rel->r_offset; + p_lda = p_ldah + rel->r_addend; + + r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value, + p_ldah, p_lda); + } + break; + + case R_ALPHA_LITERAL: + BFD_ASSERT(sgot != NULL); + BFD_ASSERT(gp != 0); + BFD_ASSERT(gotent != NULL); + BFD_ASSERT(gotent->use_count >= 1); + + if (!gotent->reloc_done) + { + gotent->reloc_done = 1; + + bfd_put_64 (output_bfd, value, + sgot->contents + gotent->got_offset); + + /* If the symbol has been forced local, output a + RELATIVE reloc, otherwise it will be handled in + finish_dynamic_symbol. */ + if (info->shared && !dynamic_symbol_p && !undef_weak_ref) + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, + gotent->got_offset, 0, + R_ALPHA_RELATIVE, value); + } + + value = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + value -= gp; + goto default_reloc; + + case R_ALPHA_GPREL32: + case R_ALPHA_GPREL16: + case R_ALPHA_GPRELLOW: + if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: gp-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + BFD_ASSERT(gp != 0); + value -= gp; + goto default_reloc; + + case R_ALPHA_GPRELHIGH: + if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: gp-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + BFD_ASSERT(gp != 0); + value -= gp; + value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); + goto default_reloc; + + case R_ALPHA_HINT: + /* A call to a dynamic symbol is definitely out of range of + the 16-bit displacement. Don't bother writing anything. */ + if (dynamic_symbol_p) + { + r = bfd_reloc_ok; + break; + } + /* The regular PC-relative stuff measures from the start of + the instruction rather than the end. */ + value -= 4; + goto default_reloc; + + case R_ALPHA_BRADDR: + if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: pc-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + /* The regular PC-relative stuff measures from the start of + the instruction rather than the end. */ + value -= 4; + goto default_reloc; + + case R_ALPHA_BRSGP: + { + int other; + const char *name; + + /* The regular PC-relative stuff measures from the start of + the instruction rather than the end. */ + value -= 4; + + /* The source and destination gp must be the same. Note that + the source will always have an assigned gp, since we forced + one in check_relocs, but that the destination may not, as + it might not have had any relocations at all. Also take + care not to crash if H is an undefined symbol. */ + if (h != NULL && sec != NULL + && alpha_elf_tdata (sec->owner)->gotobj + && gotobj != alpha_elf_tdata (sec->owner)->gotobj) + { + (*_bfd_error_handler) + (_("%B: change in gp: BRSGP %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + + /* The symbol should be marked either NOPV or STD_GPLOAD. */ + if (h != NULL) + other = h->root.other; + else + other = sym->st_other; + switch (other & STO_ALPHA_STD_GPLOAD) + { + case STO_ALPHA_NOPV: + break; + case STO_ALPHA_STD_GPLOAD: + value += 8; + break; + default: + if (h != NULL) + name = h->root.root.root.string; + else + { + name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name)); + if (name == NULL) + name = _("<unknown>"); + else if (name[0] == 0) + name = bfd_section_name (input_bfd, sec); + } + (*_bfd_error_handler) + (_("%B: !samegp reloc against symbol without .prologue: %s"), + input_bfd, name); + ret_val = FALSE; + break; + } + + goto default_reloc; + } + + case R_ALPHA_REFLONG: + case R_ALPHA_REFQUAD: + case R_ALPHA_DTPREL64: + case R_ALPHA_TPREL64: + { + long dynindx, dyntype = r_type; + bfd_vma dynaddend; + + /* Careful here to remember RELATIVE relocations for global + variables for symbolic shared objects. */ + + if (dynamic_symbol_p) + { + BFD_ASSERT(h->root.dynindx != -1); + dynindx = h->root.dynindx; + dynaddend = addend; + addend = 0, value = 0; + } + else if (r_type == R_ALPHA_DTPREL64) + { + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + value -= dtp_base; + goto default_reloc; + } + else if (r_type == R_ALPHA_TPREL64) + { + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + if (!info->shared || info->pie) + { + value -= tp_base; + goto default_reloc; + } + dynindx = 0; + dynaddend = value - dtp_base; + } + else if (info->shared + && r_symndx != STN_UNDEF + && (input_section->flags & SEC_ALLOC) + && !undef_weak_ref + && !(unresolved_reloc + && (_bfd_elf_section_offset (output_bfd, info, + input_section, + rel->r_offset) + == (bfd_vma) -1))) + { + if (r_type == R_ALPHA_REFLONG) + { + (*_bfd_error_handler) + (_("%B: unhandled dynamic relocation against %s"), + input_bfd, + h->root.root.root.string); + ret_val = FALSE; + } + dynindx = 0; + dyntype = R_ALPHA_RELATIVE; + dynaddend = value; + } + else + goto default_reloc; + + if (input_section->flags & SEC_ALLOC) + elf64_alpha_emit_dynrel (output_bfd, info, input_section, + srel, rel->r_offset, dynindx, + dyntype, dynaddend); + } + goto default_reloc; + + case R_ALPHA_SREL16: + case R_ALPHA_SREL32: + case R_ALPHA_SREL64: + if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: pc-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + else if ((info->shared || info->pie) && undef_weak_ref) + { + (*_bfd_error_handler) + (_("%B: pc-relative relocation against undefined weak symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + + + /* ??? .eh_frame references to discarded sections will be smashed + to relocations against SHN_UNDEF. The .eh_frame format allows + NULL to be encoded as 0 in any format, so this works here. */ + if (r_symndx == STN_UNDEF + || (unresolved_reloc + && _bfd_elf_section_offset (output_bfd, info, + input_section, + rel->r_offset) == (bfd_vma) -1)) + howto = (elf64_alpha_howto_table + + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG)); + goto default_reloc; + + case R_ALPHA_TLSLDM: + /* Ignore the symbol for the relocation. The result is always + the current module. */ + dynamic_symbol_p = 0; + /* FALLTHRU */ + + case R_ALPHA_TLSGD: + if (!gotent->reloc_done) + { + gotent->reloc_done = 1; + + /* Note that the module index for the main program is 1. */ + bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p, + sgot->contents + gotent->got_offset); + + /* If the symbol has been forced local, output a + DTPMOD64 reloc, otherwise it will be handled in + finish_dynamic_symbol. */ + if (info->shared && !dynamic_symbol_p) + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, + gotent->got_offset, 0, + R_ALPHA_DTPMOD64, 0); + + if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM) + value = 0; + else + { + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + value -= dtp_base; + } + bfd_put_64 (output_bfd, value, + sgot->contents + gotent->got_offset + 8); + } + + value = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + value -= gp; + goto default_reloc; + + case R_ALPHA_DTPRELHI: + case R_ALPHA_DTPRELLO: + case R_ALPHA_DTPREL16: + if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: dtp-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + value -= dtp_base; + if (r_type == R_ALPHA_DTPRELHI) + value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); + goto default_reloc; + + case R_ALPHA_TPRELHI: + case R_ALPHA_TPRELLO: + case R_ALPHA_TPREL16: + if (info->shared && !info->pie) + { + (*_bfd_error_handler) + (_("%B: TLS local exec code cannot be linked into shared objects"), + input_bfd); + ret_val = FALSE; + } + else if (dynamic_symbol_p) + { + (*_bfd_error_handler) + (_("%B: tp-relative relocation against dynamic symbol %s"), + input_bfd, h->root.root.root.string); + ret_val = FALSE; + } + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + value -= tp_base; + if (r_type == R_ALPHA_TPRELHI) + value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1); + goto default_reloc; + + case R_ALPHA_GOTDTPREL: + case R_ALPHA_GOTTPREL: + BFD_ASSERT(sgot != NULL); + BFD_ASSERT(gp != 0); + BFD_ASSERT(gotent != NULL); + BFD_ASSERT(gotent->use_count >= 1); + + if (!gotent->reloc_done) + { + gotent->reloc_done = 1; + + if (dynamic_symbol_p) + value = 0; + else + { + BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); + if (r_type == R_ALPHA_GOTDTPREL) + value -= dtp_base; + else if (!info->shared) + value -= tp_base; + else + { + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot, + gotent->got_offset, 0, + R_ALPHA_TPREL64, + value - dtp_base); + value = 0; + } + } + bfd_put_64 (output_bfd, value, + sgot->contents + gotent->got_offset); + } + + value = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + value -= gp; + goto default_reloc; + + default: + default_reloc: + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, 0); + break; + } + + switch (r) + { + case bfd_reloc_ok: + break; + + case bfd_reloc_overflow: + { + const char *name; + + /* Don't warn if the overflow is due to pc relative reloc + against discarded section. Section optimization code should + handle it. */ + + if (r_symndx < symtab_hdr->sh_info + && sec != NULL && howto->pc_relative + && discarded_section (sec)) + break; + + if (h != NULL) + name = NULL; + else + { + name = (bfd_elf_string_from_elf_section + (input_bfd, symtab_hdr->sh_link, sym->st_name)); + if (name == NULL) + return FALSE; + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + if (! ((*info->callbacks->reloc_overflow) + (info, (h ? &h->root.root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, + rel->r_offset))) + ret_val = FALSE; + } + break; + + default: + case bfd_reloc_outofrange: + abort (); + } + } + + return ret_val; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h; + bfd *dynobj = elf_hash_table(info)->dynobj; + + if (h->needs_plt) + { + /* Fill in the .plt entry for this symbol. */ + asection *splt, *sgot, *srel; + Elf_Internal_Rela outrel; + bfd_byte *loc; + bfd_vma got_addr, plt_addr; + bfd_vma plt_index; + struct alpha_elf_got_entry *gotent; + + BFD_ASSERT (h->dynindx != -1); + + splt = bfd_get_linker_section (dynobj, ".plt"); + BFD_ASSERT (splt != NULL); + srel = bfd_get_linker_section (dynobj, ".rela.plt"); + BFD_ASSERT (srel != NULL); + + for (gotent = ah->got_entries; gotent ; gotent = gotent->next) + if (gotent->reloc_type == R_ALPHA_LITERAL + && gotent->use_count > 0) + { + unsigned int insn; + int disp; + + sgot = alpha_elf_tdata (gotent->gotobj)->got; + BFD_ASSERT (sgot != NULL); + + BFD_ASSERT (gotent->got_offset != -1); + BFD_ASSERT (gotent->plt_offset != -1); + + got_addr = (sgot->output_section->vma + + sgot->output_offset + + gotent->got_offset); + plt_addr = (splt->output_section->vma + + splt->output_offset + + gotent->plt_offset); + + plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; + + /* Fill in the entry in the procedure linkage table. */ + if (elf64_alpha_use_secureplt) + { + disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4); + insn = INSN_AD (INSN_BR, 31, disp); + bfd_put_32 (output_bfd, insn, + splt->contents + gotent->plt_offset); + + plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE) + / NEW_PLT_ENTRY_SIZE); + } + else + { + disp = -(gotent->plt_offset + 4); + insn = INSN_AD (INSN_BR, 28, disp); + bfd_put_32 (output_bfd, insn, + splt->contents + gotent->plt_offset); + bfd_put_32 (output_bfd, INSN_UNOP, + splt->contents + gotent->plt_offset + 4); + bfd_put_32 (output_bfd, INSN_UNOP, + splt->contents + gotent->plt_offset + 8); + + plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE) + / OLD_PLT_ENTRY_SIZE); + } + + /* Fill in the entry in the .rela.plt section. */ + outrel.r_offset = got_addr; + outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT); + outrel.r_addend = 0; + + loc = srel->contents + plt_index * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + + /* Fill in the entry in the .got. */ + bfd_put_64 (output_bfd, plt_addr, + sgot->contents + gotent->got_offset); + } + } + else if (alpha_elf_dynamic_symbol_p (h, info)) + { + /* Fill in the dynamic relocations for this symbol's .got entries. */ + asection *srel; + struct alpha_elf_got_entry *gotent; + + srel = bfd_get_linker_section (dynobj, ".rela.got"); + BFD_ASSERT (srel != NULL); + + for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries; + gotent != NULL; + gotent = gotent->next) + { + asection *sgot; + long r_type; + + if (gotent->use_count == 0) + continue; + + sgot = alpha_elf_tdata (gotent->gotobj)->got; + + r_type = gotent->reloc_type; + switch (r_type) + { + case R_ALPHA_LITERAL: + r_type = R_ALPHA_GLOB_DAT; + break; + case R_ALPHA_TLSGD: + r_type = R_ALPHA_DTPMOD64; + break; + case R_ALPHA_GOTDTPREL: + r_type = R_ALPHA_DTPREL64; + break; + case R_ALPHA_GOTTPREL: + r_type = R_ALPHA_TPREL64; + break; + case R_ALPHA_TLSLDM: + default: + abort (); + } + + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, + gotent->got_offset, h->dynindx, + r_type, gotent->addend); + + if (gotent->reloc_type == R_ALPHA_TLSGD) + elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel, + gotent->got_offset + 8, h->dynindx, + R_ALPHA_DTPREL64, gotent->addend); + } + } + + /* Mark some specially defined symbols as absolute. */ + if (h == elf_hash_table (info)->hdynamic + || h == elf_hash_table (info)->hgot + || h == elf_hash_table (info)->hplt) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +elf64_alpha_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + bfd *dynobj; + asection *sdyn; + + dynobj = elf_hash_table (info)->dynobj; + sdyn = bfd_get_linker_section (dynobj, ".dynamic"); + + if (elf_hash_table (info)->dynamic_sections_created) + { + asection *splt, *sgotplt, *srelaplt; + Elf64_External_Dyn *dyncon, *dynconend; + bfd_vma plt_vma, gotplt_vma; + + splt = bfd_get_linker_section (dynobj, ".plt"); + srelaplt = bfd_get_linker_section (output_bfd, ".rela.plt"); + BFD_ASSERT (splt != NULL && sdyn != NULL); + + plt_vma = splt->output_section->vma + splt->output_offset; + + gotplt_vma = 0; + if (elf64_alpha_use_secureplt) + { + sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); + BFD_ASSERT (sgotplt != NULL); + if (sgotplt->size > 0) + gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset; + } + + dyncon = (Elf64_External_Dyn *) sdyn->contents; + dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + + bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + case DT_PLTGOT: + dyn.d_un.d_ptr + = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma; + break; + case DT_PLTRELSZ: + dyn.d_un.d_val = srelaplt ? srelaplt->size : 0; + break; + case DT_JMPREL: + dyn.d_un.d_ptr = srelaplt ? srelaplt->vma : 0; + break; + + case DT_RELASZ: + /* My interpretation of the TIS v1.1 ELF document indicates + that RELASZ should not include JMPREL. This is not what + the rest of the BFD does. It is, however, what the + glibc ld.so wants. Do this fixup here until we found + out who is right. */ + if (srelaplt) + dyn.d_un.d_val -= srelaplt->size; + break; + } + + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + + /* Initialize the plt header. */ + if (splt->size > 0) + { + unsigned int insn; + int ofs; + + if (elf64_alpha_use_secureplt) + { + ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE); + + insn = INSN_ABC (INSN_SUBQ, 27, 28, 25); + bfd_put_32 (output_bfd, insn, splt->contents); + + insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16); + bfd_put_32 (output_bfd, insn, splt->contents + 4); + + insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25); + bfd_put_32 (output_bfd, insn, splt->contents + 8); + + insn = INSN_ABO (INSN_LDA, 28, 28, ofs); + bfd_put_32 (output_bfd, insn, splt->contents + 12); + + insn = INSN_ABO (INSN_LDQ, 27, 28, 0); + bfd_put_32 (output_bfd, insn, splt->contents + 16); + + insn = INSN_ABC (INSN_ADDQ, 25, 25, 25); + bfd_put_32 (output_bfd, insn, splt->contents + 20); + + insn = INSN_ABO (INSN_LDQ, 28, 28, 8); + bfd_put_32 (output_bfd, insn, splt->contents + 24); + + insn = INSN_AB (INSN_JMP, 31, 27); + bfd_put_32 (output_bfd, insn, splt->contents + 28); + + insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE); + bfd_put_32 (output_bfd, insn, splt->contents + 32); + } + else + { + insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */ + bfd_put_32 (output_bfd, insn, splt->contents); + + insn = INSN_ABO (INSN_LDQ, 27, 27, 12); + bfd_put_32 (output_bfd, insn, splt->contents + 4); + + insn = INSN_UNOP; + bfd_put_32 (output_bfd, insn, splt->contents + 8); + + insn = INSN_AB (INSN_JMP, 27, 27); + bfd_put_32 (output_bfd, insn, splt->contents + 12); + + /* The next two words will be filled in by ld.so. */ + bfd_put_64 (output_bfd, 0, splt->contents + 16); + bfd_put_64 (output_bfd, 0, splt->contents + 24); + } + + elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0; + } + } + + return TRUE; +} + +/* We need to use a special link routine to handle the .mdebug section. + We need to merge all instances of these sections together, not write + them all out sequentially. */ + +static bfd_boolean +elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info) +{ + asection *o; + struct bfd_link_order *p; + asection *mdebug_sec; + struct ecoff_debug_info debug; + const struct ecoff_debug_swap *swap + = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap; + HDRR *symhdr = &debug.symbolic_header; + void * mdebug_handle = NULL; + struct alpha_elf_link_hash_table * htab; + + htab = alpha_elf_hash_table (info); + if (htab == NULL) + return FALSE; + + /* Go through the sections and collect the mdebug information. */ + mdebug_sec = NULL; + for (o = abfd->sections; o != (asection *) NULL; o = o->next) + { + if (strcmp (o->name, ".mdebug") == 0) + { + struct extsym_info einfo; + + /* We have found the .mdebug section in the output file. + Look through all the link_orders comprising it and merge + the information together. */ + symhdr->magic = swap->sym_magic; + /* FIXME: What should the version stamp be? */ + symhdr->vstamp = 0; + symhdr->ilineMax = 0; + symhdr->cbLine = 0; + symhdr->idnMax = 0; + symhdr->ipdMax = 0; + symhdr->isymMax = 0; + symhdr->ioptMax = 0; + symhdr->iauxMax = 0; + symhdr->issMax = 0; + symhdr->issExtMax = 0; + symhdr->ifdMax = 0; + symhdr->crfd = 0; + symhdr->iextMax = 0; + + /* We accumulate the debugging information itself in the + debug_info structure. */ + debug.line = NULL; + debug.external_dnr = NULL; + debug.external_pdr = NULL; + debug.external_sym = NULL; + debug.external_opt = NULL; + debug.external_aux = NULL; + debug.ss = NULL; + debug.ssext = debug.ssext_end = NULL; + debug.external_fdr = NULL; + debug.external_rfd = NULL; + debug.external_ext = debug.external_ext_end = NULL; + + mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info); + if (mdebug_handle == NULL) + return FALSE; + + if (1) + { + asection *s; + EXTR esym; + bfd_vma last = 0; + unsigned int i; + static const char * const name[] = + { + ".text", ".init", ".fini", ".data", + ".rodata", ".sdata", ".sbss", ".bss" + }; + static const int sc[] = { scText, scInit, scFini, scData, + scRData, scSData, scSBss, scBss }; + + esym.jmptbl = 0; + esym.cobol_main = 0; + esym.weakext = 0; + esym.reserved = 0; + esym.ifd = ifdNil; + esym.asym.iss = issNil; + esym.asym.st = stLocal; + esym.asym.reserved = 0; + esym.asym.index = indexNil; + for (i = 0; i < 8; i++) + { + esym.asym.sc = sc[i]; + s = bfd_get_section_by_name (abfd, name[i]); + if (s != NULL) + { + esym.asym.value = s->vma; + last = s->vma + s->size; + } + else + esym.asym.value = last; + + if (! bfd_ecoff_debug_one_external (abfd, &debug, swap, + name[i], &esym)) + return FALSE; + } + } + + for (p = o->map_head.link_order; + p != (struct bfd_link_order *) NULL; + p = p->next) + { + asection *input_section; + bfd *input_bfd; + const struct ecoff_debug_swap *input_swap; + struct ecoff_debug_info input_debug; + char *eraw_src; + char *eraw_end; + + if (p->type != bfd_indirect_link_order) + { + if (p->type == bfd_data_link_order) + continue; + abort (); + } + + input_section = p->u.indirect.section; + input_bfd = input_section->owner; + + if (! is_alpha_elf (input_bfd)) + /* I don't know what a non ALPHA ELF bfd would be + doing with a .mdebug section, but I don't really + want to deal with it. */ + continue; + + input_swap = (get_elf_backend_data (input_bfd) + ->elf_backend_ecoff_debug_swap); + + BFD_ASSERT (p->size == input_section->size); + + /* The ECOFF linking code expects that we have already + read in the debugging information and set up an + ecoff_debug_info structure, so we do that now. */ + if (!elf64_alpha_read_ecoff_info (input_bfd, input_section, + &input_debug)) + return FALSE; + + if (! (bfd_ecoff_debug_accumulate + (mdebug_handle, abfd, &debug, swap, input_bfd, + &input_debug, input_swap, info))) + return FALSE; + + /* Loop through the external symbols. For each one with + interesting information, try to find the symbol in + the linker global hash table and save the information + for the output external symbols. */ + eraw_src = (char *) input_debug.external_ext; + eraw_end = (eraw_src + + (input_debug.symbolic_header.iextMax + * input_swap->external_ext_size)); + for (; + eraw_src < eraw_end; + eraw_src += input_swap->external_ext_size) + { + EXTR ext; + const char *name; + struct alpha_elf_link_hash_entry *h; + + (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext); + if (ext.asym.sc == scNil + || ext.asym.sc == scUndefined + || ext.asym.sc == scSUndefined) + continue; + + name = input_debug.ssext + ext.asym.iss; + h = alpha_elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); + if (h == NULL || h->esym.ifd != -2) + continue; + + if (ext.ifd != -1) + { + BFD_ASSERT (ext.ifd + < input_debug.symbolic_header.ifdMax); + ext.ifd = input_debug.ifdmap[ext.ifd]; + } + + h->esym = ext; + } + + /* Free up the information we just read. */ + free (input_debug.line); + free (input_debug.external_dnr); + free (input_debug.external_pdr); + free (input_debug.external_sym); + free (input_debug.external_opt); + free (input_debug.external_aux); + free (input_debug.ss); + free (input_debug.ssext); + free (input_debug.external_fdr); + free (input_debug.external_rfd); + free (input_debug.external_ext); + + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &=~ SEC_HAS_CONTENTS; + } + + /* Build the external symbol information. */ + einfo.abfd = abfd; + einfo.info = info; + einfo.debug = &debug; + einfo.swap = swap; + einfo.failed = FALSE; + elf_link_hash_traverse (elf_hash_table (info), + elf64_alpha_output_extsym, + &einfo); + if (einfo.failed) + return FALSE; + + /* Set the size of the .mdebug section. */ + o->size = bfd_ecoff_debug_size (abfd, &debug, swap); + + /* Skip this section later on (I don't think this currently + matters, but someday it might). */ + o->map_head.link_order = (struct bfd_link_order *) NULL; + + mdebug_sec = o; + } + } + + /* Invoke the regular ELF backend linker to do all the work. */ + if (! bfd_elf_final_link (abfd, info)) + return FALSE; + + /* Now write out the computed sections. */ + + /* The .got subsections... */ + { + bfd *i, *dynobj = elf_hash_table(info)->dynobj; + for (i = htab->got_list; + i != NULL; + i = alpha_elf_tdata(i)->got_link_next) + { + asection *sgot; + + /* elf_bfd_final_link already did everything in dynobj. */ + if (i == dynobj) + continue; + + sgot = alpha_elf_tdata(i)->got; + if (! bfd_set_section_contents (abfd, sgot->output_section, + sgot->contents, + (file_ptr) sgot->output_offset, + sgot->size)) + return FALSE; + } + } + + if (mdebug_sec != (asection *) NULL) + { + BFD_ASSERT (abfd->output_has_begun); + if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug, + swap, info, + mdebug_sec->filepos)) + return FALSE; + + bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info); + } + + return TRUE; +} + +static enum elf_reloc_type_class +elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, + const asection *rel_sec ATTRIBUTE_UNUSED, + const Elf_Internal_Rela *rela) +{ + switch ((int) ELF64_R_TYPE (rela->r_info)) + { + case R_ALPHA_RELATIVE: + return reloc_class_relative; + case R_ALPHA_JMP_SLOT: + return reloc_class_plt; + case R_ALPHA_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} + +static const struct bfd_elf_special_section elf64_alpha_special_sections[] = +{ + { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, + { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL }, + { NULL, 0, 0, 0, 0 } +}; + +/* ECOFF swapping routines. These are used when dealing with the + .mdebug section, which is in the ECOFF debugging format. Copied + from elf32-mips.c. */ +static const struct ecoff_debug_swap +elf64_alpha_ecoff_debug_swap = +{ + /* Symbol table magic number. */ + magicSym2, + /* Alignment of debugging information. E.g., 4. */ + 8, + /* Sizes of external symbolic information. */ + sizeof (struct hdr_ext), + sizeof (struct dnr_ext), + sizeof (struct pdr_ext), + sizeof (struct sym_ext), + sizeof (struct opt_ext), + sizeof (struct fdr_ext), + sizeof (struct rfd_ext), + sizeof (struct ext_ext), + /* Functions to swap in external symbolic data. */ + ecoff_swap_hdr_in, + ecoff_swap_dnr_in, + ecoff_swap_pdr_in, + ecoff_swap_sym_in, + ecoff_swap_opt_in, + ecoff_swap_fdr_in, + ecoff_swap_rfd_in, + ecoff_swap_ext_in, + _bfd_ecoff_swap_tir_in, + _bfd_ecoff_swap_rndx_in, + /* Functions to swap out external symbolic data. */ + ecoff_swap_hdr_out, + ecoff_swap_dnr_out, + ecoff_swap_pdr_out, + ecoff_swap_sym_out, + ecoff_swap_opt_out, + ecoff_swap_fdr_out, + ecoff_swap_rfd_out, + ecoff_swap_ext_out, + _bfd_ecoff_swap_tir_out, + _bfd_ecoff_swap_rndx_out, + /* Function to read in symbolic data. */ + elf64_alpha_read_ecoff_info +}; + +/* Use a non-standard hash bucket size of 8. */ + +static const struct elf_size_info alpha_elf_size_info = +{ + sizeof (Elf64_External_Ehdr), + sizeof (Elf64_External_Phdr), + sizeof (Elf64_External_Shdr), + sizeof (Elf64_External_Rel), + sizeof (Elf64_External_Rela), + sizeof (Elf64_External_Sym), + sizeof (Elf64_External_Dyn), + sizeof (Elf_External_Note), + 8, + 1, + 64, 3, + ELFCLASS64, EV_CURRENT, + bfd_elf64_write_out_phdrs, + bfd_elf64_write_shdrs_and_ehdr, + bfd_elf64_checksum_contents, + bfd_elf64_write_relocs, + bfd_elf64_swap_symbol_in, + bfd_elf64_swap_symbol_out, + bfd_elf64_slurp_reloc_table, + bfd_elf64_slurp_symbol_table, + bfd_elf64_swap_dyn_in, + bfd_elf64_swap_dyn_out, + bfd_elf64_swap_reloc_in, + bfd_elf64_swap_reloc_out, + bfd_elf64_swap_reloca_in, + bfd_elf64_swap_reloca_out +}; + +#define TARGET_LITTLE_SYM bfd_elf64_alpha_vec +#define TARGET_LITTLE_NAME "elf64-alpha" +#define ELF_ARCH bfd_arch_alpha +#define ELF_TARGET_ID ALPHA_ELF_DATA +#define ELF_MACHINE_CODE EM_ALPHA +#define ELF_MAXPAGESIZE 0x10000 +#define ELF_COMMONPAGESIZE 0x2000 + +#define bfd_elf64_bfd_link_hash_table_create \ + elf64_alpha_bfd_link_hash_table_create + +#define bfd_elf64_bfd_reloc_type_lookup \ + elf64_alpha_bfd_reloc_type_lookup +#define bfd_elf64_bfd_reloc_name_lookup \ + elf64_alpha_bfd_reloc_name_lookup +#define elf_info_to_howto \ + elf64_alpha_info_to_howto + +#define bfd_elf64_mkobject \ + elf64_alpha_mkobject +#define elf_backend_object_p \ + elf64_alpha_object_p + +#define elf_backend_section_from_shdr \ + elf64_alpha_section_from_shdr +#define elf_backend_section_flags \ + elf64_alpha_section_flags +#define elf_backend_fake_sections \ + elf64_alpha_fake_sections + +#define bfd_elf64_bfd_is_local_label_name \ + elf64_alpha_is_local_label_name +#define bfd_elf64_find_nearest_line \ + elf64_alpha_find_nearest_line +#define bfd_elf64_bfd_relax_section \ + elf64_alpha_relax_section + +#define elf_backend_add_symbol_hook \ + elf64_alpha_add_symbol_hook +#define elf_backend_relocs_compatible \ + _bfd_elf_relocs_compatible +#define elf_backend_check_relocs \ + elf64_alpha_check_relocs +#define elf_backend_create_dynamic_sections \ + elf64_alpha_create_dynamic_sections +#define elf_backend_adjust_dynamic_symbol \ + elf64_alpha_adjust_dynamic_symbol +#define elf_backend_merge_symbol_attribute \ + elf64_alpha_merge_symbol_attribute +#define elf_backend_copy_indirect_symbol \ + elf64_alpha_copy_indirect_symbol +#define elf_backend_always_size_sections \ + elf64_alpha_always_size_sections +#define elf_backend_size_dynamic_sections \ + elf64_alpha_size_dynamic_sections +#define elf_backend_omit_section_dynsym \ + ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) +#define elf_backend_relocate_section \ + elf64_alpha_relocate_section +#define elf_backend_finish_dynamic_symbol \ + elf64_alpha_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + elf64_alpha_finish_dynamic_sections +#define bfd_elf64_bfd_final_link \ + elf64_alpha_final_link +#define elf_backend_reloc_type_class \ + elf64_alpha_reloc_type_class + +#define elf_backend_can_gc_sections 1 +#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook +#define elf_backend_gc_sweep_hook elf64_alpha_gc_sweep_hook + +#define elf_backend_ecoff_debug_swap \ + &elf64_alpha_ecoff_debug_swap + +#define elf_backend_size_info \ + alpha_elf_size_info + +#define elf_backend_special_sections \ + elf64_alpha_special_sections + +/* A few constants that determine how the .plt section is set up. */ +#define elf_backend_want_got_plt 0 +#define elf_backend_plt_readonly 0 +#define elf_backend_want_plt_sym 1 +#define elf_backend_got_header_size 0 + +#include "elf64-target.h" + +/* FreeBSD support. */ + +#undef TARGET_LITTLE_SYM +#define TARGET_LITTLE_SYM bfd_elf64_alpha_freebsd_vec +#undef TARGET_LITTLE_NAME +#define TARGET_LITTLE_NAME "elf64-alpha-freebsd" +#undef ELF_OSABI +#define ELF_OSABI ELFOSABI_FREEBSD + +/* The kernel recognizes executables as valid only if they carry a + "FreeBSD" label in the ELF header. So we put this label on all + executables and (for simplicity) also all other object files. */ + +static void +elf64_alpha_fbsd_post_process_headers (bfd * abfd, + struct bfd_link_info * link_info ATTRIBUTE_UNUSED) +{ + Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ + + i_ehdrp = elf_elfheader (abfd); + + /* Put an ABI label supported by FreeBSD >= 4.1. */ + i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; +#ifdef OLD_FREEBSD_ABI_LABEL + /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ + memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); +#endif +} + +#undef elf_backend_post_process_headers +#define elf_backend_post_process_headers \ + elf64_alpha_fbsd_post_process_headers + +#undef elf64_bed +#define elf64_bed elf64_alpha_fbsd_bed + +#include "elf64-target.h" |