diff options
Diffstat (limited to 'binutils-2.25/bfd/nlm32-alpha.c')
| -rw-r--r-- | binutils-2.25/bfd/nlm32-alpha.c | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/nlm32-alpha.c b/binutils-2.25/bfd/nlm32-alpha.c new file mode 100644 index 00000000..33bb5b31 --- /dev/null +++ b/binutils-2.25/bfd/nlm32-alpha.c @@ -0,0 +1,860 @@ +/* Support for 32-bit Alpha NLM (NetWare Loadable Module) + Copyright 1993, 1994, 2000, 2001, 2002, 2003, 2004, 2005, 2007 + Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + + 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. */ + + +/* This file describes the 32 bit Alpha NLM format. You might think + that an Alpha chip would use a 64 bit format, but, for some reason, + it doesn't. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" + +#define ARCH_SIZE 32 + +#include "nlm/alpha-ext.h" +#define Nlm_External_Fixed_Header Nlm32_alpha_External_Fixed_Header + +#include "libnlm.h" + +/* Alpha NLM's have a prefix header before the standard NLM. This + function reads it in, verifies the version, and seeks the bfd to + the location before the regular NLM header. */ + +static bfd_boolean +nlm_alpha_backend_object_p (bfd *abfd) +{ + struct nlm32_alpha_external_prefix_header s; + file_ptr size; + + if (bfd_bread (&s, (bfd_size_type) sizeof s, abfd) != sizeof s) + return FALSE; + + if (H_GET_32 (abfd, s.magic) != NLM32_ALPHA_MAGIC) + return FALSE; + + /* FIXME: Should we check the format number? */ + + /* Skip to the end of the header. */ + size = H_GET_32 (abfd, s.size); + if (bfd_seek (abfd, size, SEEK_SET) != 0) + return FALSE; + + return TRUE; +} + +/* Write out the prefix. */ + +static bfd_boolean +nlm_alpha_write_prefix (bfd *abfd) +{ + struct nlm32_alpha_external_prefix_header s; + + memset (&s, 0, sizeof s); + H_PUT_32 (abfd, NLM32_ALPHA_MAGIC, s.magic); + H_PUT_32 (abfd, 2, s.format); + H_PUT_32 (abfd, sizeof s, s.size); + if (bfd_bwrite (&s, (bfd_size_type) sizeof s, abfd) != sizeof s) + return FALSE; + return TRUE; +} + +#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) + +/* How to process the various reloc types. */ + +static reloc_howto_type nlm32_alpha_howto_table[] = +{ + /* Reloc type 0 is ignored by itself. However, it appears after a + GPDISP reloc to identify the location where the low order 16 bits + of the gp register are loaded. */ + HOWTO (ALPHA_R_IGNORE, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 8, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "IGNORE", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* A 32 bit reference to a symbol. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "REFLONG", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* A 64 bit reference to a symbol. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "REFQUAD", /* Name. */ + TRUE, /* Partial_inplace. */ + ONES (64), /* Source mask. */ + ONES (64), /* Dest 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 (ALPHA_R_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. */ + 0, /* Special_function. */ + "GPREL32", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Used for an instruction that refers to memory off the GP + register. The offset is 16 bits of the 32 bit instruction. This + reloc always seems to be against the .lita section. */ + HOWTO (ALPHA_R_LITERAL, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "LITERAL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* This reloc only appears immediately following a LITERAL reloc. + It identifies a use of the literal. It seems that the linker can + use this to eliminate a portion of the .lita section. 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 (ALPHA_R_LITUSE, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 32, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "LITUSE", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest 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 next reloc + will be an IGNORE reloc which identifies the location of the lda + instruction which loads the lower 16 bits. The symbol index of + the GPDISP instruction appears to actually be the number of bytes + between the ldah and lda instructions. This gives two different + ways to determine where the lda instruction is; I don't know why + both are used. 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. */ + HOWTO (ALPHA_R_GPDISP, /* Type. */ + 16, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + TRUE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "GPDISP", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + TRUE), /* PCrel_offset. */ + + /* A 21 bit branch. The native assembler generates these for + branches within the text segment, and also fills in the PC + relative offset in the instruction. It seems to me that this + reloc, unlike the others, is not partial_inplace. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "BRADDR", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0x1fffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* A hint for a jump to a register. */ + HOWTO (ALPHA_R_HINT, /* Type. */ + 2, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 14, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "HINT", /* Name. */ + TRUE, /* Partial_inplace. */ + 0x3fff, /* Source mask. */ + 0x3fff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* 16 bit PC relative offset. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "SREL16", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* 32 bit PC relative offset. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "SREL32", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* A 64 bit PC relative offset. */ + HOWTO (ALPHA_R_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. */ + 0, /* Special_function. */ + "SREL64", /* Name. */ + TRUE, /* Partial_inplace. */ + ONES (64), /* Source mask. */ + ONES (64), /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Push a value on the reloc evaluation stack. */ + HOWTO (ALPHA_R_OP_PUSH, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "OP_PUSH", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Store the value from the stack at the given address. Store it in + a bitfield of size r_size starting at bit position r_offset. */ + HOWTO (ALPHA_R_OP_STORE, /* Type. */ + 0, /* Rightshift. */ + 4, /* Size (0 = byte, 1 = short, 2 = long). */ + 64, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "OP_STORE", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + ONES (64), /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Subtract the reloc address from the value on the top of the + relocation stack. */ + HOWTO (ALPHA_R_OP_PSUB, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "OP_PSUB", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Shift the value on the top of the relocation stack right by the + given value. */ + HOWTO (ALPHA_R_OP_PRSHIFT, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "OP_PRSHIFT", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE), /* PCrel_offset. */ + + /* Adjust the GP value for a new range in the object file. */ + HOWTO (ALPHA_R_GPVALUE, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "GPVALUE", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE) /* PCrel_offset. */ +}; + +static reloc_howto_type nlm32_alpha_nw_howto = + HOWTO (ALPHA_R_NW_RELOC, /* Type. */ + 0, /* Rightshift. */ + 0, /* Size (0 = byte, 1 = short, 2 = long). */ + 0, /* Bitsize. */ + FALSE, /* PC_relative. */ + 0, /* Bitpos. */ + complain_overflow_dont, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "NW_RELOC", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE); /* PCrel_offset. */ + +/* Read an Alpha NLM reloc. This routine keeps some static data which + it uses when handling local relocs. This only works correctly + because all the local relocs are read at once. */ + +static bfd_boolean +nlm_alpha_read_reloc (bfd *abfd, + nlmNAME (symbol_type) *sym, + asection **secp, + arelent *rel) +{ + static bfd_vma gp_value; + static bfd_vma lita_address; + struct nlm32_alpha_external_reloc ext; + bfd_vma r_vaddr; + long r_symndx; + int r_type, r_extern, r_offset, r_size; + asection *code_sec, *data_sec; + + /* Read the reloc from the file. */ + if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) + return FALSE; + + /* Swap in the reloc information. */ + r_vaddr = H_GET_64 (abfd, ext.r_vaddr); + r_symndx = H_GET_32 (abfd, ext.r_symndx); + + BFD_ASSERT (bfd_little_endian (abfd)); + + r_type = ((ext.r_bits[0] & RELOC_BITS0_TYPE_LITTLE) + >> RELOC_BITS0_TYPE_SH_LITTLE); + r_extern = (ext.r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; + r_offset = ((ext.r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) + >> RELOC_BITS1_OFFSET_SH_LITTLE); + /* Ignore the reserved bits. */ + r_size = ((ext.r_bits[3] & RELOC_BITS3_SIZE_LITTLE) + >> RELOC_BITS3_SIZE_SH_LITTLE); + + /* Fill in the BFD arelent structure. */ + code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + if (r_extern) + { + /* External relocations are only used for imports. */ + BFD_ASSERT (sym != NULL); + /* We don't need to set sym_ptr_ptr for this case. It is set in + nlm_canonicalize_reloc. */ + rel->sym_ptr_ptr = NULL; + rel->addend = 0; + } + else + { + /* Internal relocations are only used for local relocation + fixups. If they are not NW_RELOC or GPDISP or IGNORE, they + must be against .text or .data. */ + BFD_ASSERT (r_type == ALPHA_R_NW_RELOC || sym == NULL); + if (r_type == ALPHA_R_NW_RELOC + || r_type == ALPHA_R_GPDISP + || r_type == ALPHA_R_IGNORE) + { + rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + rel->addend = 0; + } + else if (r_symndx == ALPHA_RELOC_SECTION_TEXT) + { + rel->sym_ptr_ptr = code_sec->symbol_ptr_ptr; + BFD_ASSERT (bfd_get_section_vma (abfd, code_sec) == 0); + rel->addend = 0; + } + else if (r_symndx == ALPHA_RELOC_SECTION_DATA) + { + rel->sym_ptr_ptr = data_sec->symbol_ptr_ptr; + rel->addend = - bfd_get_section_vma (abfd, data_sec); + } + else + { + BFD_ASSERT (0); + rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + rel->addend = 0; + } + } + + /* We use the address to determine whether the reloc is in the .text + or .data section. R_NW_RELOC relocs don't really have a section, + so we put them in .text. */ + if (r_type == ALPHA_R_NW_RELOC + || r_vaddr < code_sec->size) + { + *secp = code_sec; + rel->address = r_vaddr; + } + else + { + *secp = data_sec; + rel->address = r_vaddr - code_sec->size; + } + + /* We must adjust the addend based on the type. */ + BFD_ASSERT ((r_type >= 0 && r_type <= ALPHA_R_GPVALUE) + || r_type == ALPHA_R_NW_RELOC); + + switch (r_type) + { + case ALPHA_R_BRADDR: + case ALPHA_R_SREL16: + case ALPHA_R_SREL32: + case ALPHA_R_SREL64: + /* The PC relative relocs do not seem to use the section VMA as + a negative addend. */ + rel->addend = 0; + break; + + case ALPHA_R_GPREL32: + /* Copy the gp value for this object file into the addend, to + ensure that we are not confused by the linker. */ + if (! r_extern) + rel->addend += gp_value; + break; + + case ALPHA_R_LITERAL: + BFD_ASSERT (! r_extern); + rel->addend += lita_address; + break; + + case ALPHA_R_LITUSE: + case ALPHA_R_GPDISP: + /* The LITUSE and GPDISP relocs do not use a symbol, or an + addend, but they do use a special code. Put this code in the + addend field. */ + rel->addend = r_symndx; + rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + break; + + case ALPHA_R_OP_STORE: + /* The STORE reloc needs the size and offset fields. We store + them in the addend. */ + BFD_ASSERT (r_offset < 256 && r_size < 256); + rel->addend = (r_offset << 8) + r_size; + break; + + case ALPHA_R_OP_PUSH: + case ALPHA_R_OP_PSUB: + case ALPHA_R_OP_PRSHIFT: + /* The PUSH, PSUB and PRSHIFT relocs do not actually use an + address. I believe that the address supplied is really an + addend. */ + rel->addend = r_vaddr; + break; + + case ALPHA_R_GPVALUE: + /* Record the new gp value. */ + gp_value += r_symndx; + rel->addend = gp_value; + break; + + case ALPHA_R_IGNORE: + /* If the type is ALPHA_R_IGNORE, make sure this is a reference + to the absolute section so that the reloc is ignored. For + some reason the address of this reloc type is not adjusted by + the section vma. We record the gp value for this object file + here, for convenience when doing the GPDISP relocation. */ + rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + rel->address = r_vaddr; + rel->addend = gp_value; + break; + + case ALPHA_R_NW_RELOC: + /* If this is SETGP, we set the addend to 0. Otherwise we set + the addend to the size of the .lita section (this is + r_symndx) plus 1. We have already set the address of the + reloc to r_vaddr. */ + if (r_size == ALPHA_R_NW_RELOC_SETGP) + { + gp_value = r_vaddr; + rel->addend = 0; + } + else if (r_size == ALPHA_R_NW_RELOC_LITA) + { + lita_address = r_vaddr; + rel->addend = r_symndx + 1; + } + else + BFD_ASSERT (0); + rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + break; + + default: + break; + } + + if (r_type == ALPHA_R_NW_RELOC) + rel->howto = &nlm32_alpha_nw_howto; + else + rel->howto = &nlm32_alpha_howto_table[r_type]; + + return TRUE; +} + +/* Mangle Alpha NLM relocs for output. */ + +static bfd_boolean +nlm_alpha_mangle_relocs (bfd *abfd ATTRIBUTE_UNUSED, + asection *sec ATTRIBUTE_UNUSED, + const void * data ATTRIBUTE_UNUSED, + bfd_vma offset ATTRIBUTE_UNUSED, + bfd_size_type count ATTRIBUTE_UNUSED) +{ + return TRUE; +} + +/* Read an ALPHA NLM import record. */ + +static bfd_boolean +nlm_alpha_read_import (bfd *abfd, nlmNAME (symbol_type) * sym) +{ + struct nlm_relent *nlm_relocs; /* Relocation records for symbol. */ + bfd_size_type rcount; /* Number of relocs. */ + bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* Temporary 32-bit value. */ + unsigned char symlength; /* Length of symbol name. */ + char *name; + bfd_size_type amt; + + if (bfd_bread (& symlength, (bfd_size_type) sizeof (symlength), abfd) + != sizeof (symlength)) + return FALSE; + sym -> symbol.the_bfd = abfd; + name = bfd_alloc (abfd, (bfd_size_type) symlength + 1); + if (name == NULL) + return FALSE; + if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength) + return FALSE; + name[symlength] = '\0'; + sym -> symbol.name = name; + sym -> symbol.flags = 0; + sym -> symbol.value = 0; + sym -> symbol.section = bfd_und_section_ptr; + if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) + != sizeof (temp)) + return FALSE; + rcount = H_GET_32 (abfd, temp); + amt = rcount * sizeof (struct nlm_relent); + nlm_relocs = bfd_alloc (abfd, amt); + if (!nlm_relocs) + return FALSE; + sym -> relocs = nlm_relocs; + sym -> rcnt = 0; + while (sym -> rcnt < rcount) + { + asection *section; + + if (! nlm_alpha_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc)) + return FALSE; + nlm_relocs -> section = section; + nlm_relocs++; + sym -> rcnt++; + } + + return TRUE; +} + +/* Write an Alpha NLM reloc. */ + +static bfd_boolean +nlm_alpha_write_import (bfd * abfd, asection * sec, arelent * rel) +{ + asymbol *sym; + bfd_vma r_vaddr; + long r_symndx; + int r_type, r_extern, r_offset, r_size; + struct nlm32_alpha_external_reloc ext; + + sym = *rel->sym_ptr_ptr; + + /* Get values for the relocation fields. */ + r_type = rel->howto->type; + if (r_type != ALPHA_R_NW_RELOC) + { + r_vaddr = bfd_get_section_vma (abfd, sec) + rel->address; + if ((sec->flags & SEC_CODE) == 0) + r_vaddr += bfd_get_section_by_name (abfd, NLM_CODE_NAME) -> size; + if (bfd_is_und_section (bfd_get_section (sym))) + { + r_extern = 1; + r_symndx = 0; + } + else + { + r_extern = 0; + if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE) + r_symndx = ALPHA_RELOC_SECTION_TEXT; + else + r_symndx = ALPHA_RELOC_SECTION_DATA; + } + r_offset = 0; + r_size = 0; + + switch (r_type) + { + case ALPHA_R_LITUSE: + case ALPHA_R_GPDISP: + r_symndx = rel->addend; + break; + + case ALPHA_R_OP_STORE: + r_size = rel->addend & 0xff; + r_offset = (rel->addend >> 8) & 0xff; + break; + + case ALPHA_R_OP_PUSH: + case ALPHA_R_OP_PSUB: + case ALPHA_R_OP_PRSHIFT: + r_vaddr = rel->addend; + break; + + case ALPHA_R_IGNORE: + r_vaddr = rel->address; + break; + + default: + break; + } + } + else + { + /* r_type == ALPHA_R_NW_RELOC. */ + r_vaddr = rel->address; + if (rel->addend == 0) + { + r_symndx = 0; + r_size = ALPHA_R_NW_RELOC_SETGP; + } + else + { + r_symndx = rel->addend - 1; + r_size = ALPHA_R_NW_RELOC_LITA; + } + r_extern = 0; + r_offset = 0; + } + + /* Swap out the relocation fields. */ + H_PUT_64 (abfd, r_vaddr, ext.r_vaddr); + H_PUT_32 (abfd, r_symndx, ext.r_symndx); + + BFD_ASSERT (bfd_little_endian (abfd)); + + ext.r_bits[0] = ((r_type << RELOC_BITS0_TYPE_SH_LITTLE) + & RELOC_BITS0_TYPE_LITTLE); + ext.r_bits[1] = ((r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) + | ((r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) + & RELOC_BITS1_OFFSET_LITTLE)); + ext.r_bits[2] = 0; + ext.r_bits[3] = ((r_size << RELOC_BITS3_SIZE_SH_LITTLE) + & RELOC_BITS3_SIZE_LITTLE); + + /* Write out the relocation. */ + if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) + return FALSE; + + return TRUE; +} + +/* Alpha NetWare does not use the high bit to determine whether a + public symbol is in the code segment or the data segment. Instead, + it just uses the address. The set_public_section and + get_public_offset routines override the default code which uses the + high bit. */ + +/* Set the section for a public symbol. */ + +static bfd_boolean +nlm_alpha_set_public_section (bfd * abfd, nlmNAME (symbol_type) * sym) +{ + asection *code_sec, *data_sec; + + code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + if (sym->symbol.value < code_sec->size) + { + sym->symbol.section = code_sec; + sym->symbol.flags |= BSF_FUNCTION; + } + else + { + sym->symbol.section = data_sec; + sym->symbol.value -= code_sec->size; + /* The data segment had better be aligned. */ + BFD_ASSERT ((code_sec->size & 0xf) == 0); + } + return TRUE; +} + +/* Get the offset to write out for a public symbol. */ + +static bfd_vma +nlm_alpha_get_public_offset (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) +{ + return bfd_asymbol_value (sym); +} + +/* Write an Alpha NLM external symbol. */ + +static bfd_boolean +nlm_alpha_write_external (bfd *abfd, + bfd_size_type count, + asymbol *sym, + struct reloc_and_sec *relocs) +{ + bfd_size_type i; + bfd_byte len; + unsigned char temp[NLM_TARGET_LONG_SIZE]; + arelent r; + + len = strlen (sym->name); + if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd) + != sizeof (bfd_byte)) + || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len) + return FALSE; + + bfd_put_32 (abfd, count + 2, temp); + if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) + return FALSE; + + /* The first two relocs for each external symbol are the .lita + address and the GP value. */ + r.sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; + r.howto = &nlm32_alpha_nw_howto; + + r.address = nlm_alpha_backend_data (abfd)->lita_address; + r.addend = nlm_alpha_backend_data (abfd)->lita_size + 1; + if (! nlm_alpha_write_import (abfd, NULL, &r)) + return FALSE; + + r.address = nlm_alpha_backend_data (abfd)->gp; + r.addend = 0; + if (! nlm_alpha_write_import (abfd, NULL, &r)) + return FALSE; + + for (i = 0; i < count; i++) + if (! nlm_alpha_write_import (abfd, relocs[i].sec, relocs[i].rel)) + return FALSE; + + return TRUE; +} + +#include "nlmswap.h" + +static const struct nlm_backend_data nlm32_alpha_backend = +{ + "NetWare Alpha Module \032", + sizeof (Nlm32_alpha_External_Fixed_Header), + sizeof (struct nlm32_alpha_external_prefix_header), + bfd_arch_alpha, + 0, + TRUE, /* No uninitialized data permitted by Alpha NetWare. */ + nlm_alpha_backend_object_p, + nlm_alpha_write_prefix, + nlm_alpha_read_reloc, + nlm_alpha_mangle_relocs, + nlm_alpha_read_import, + nlm_alpha_write_import, + nlm_alpha_set_public_section, + nlm_alpha_get_public_offset, + nlm_swap_fixed_header_in, + nlm_swap_fixed_header_out, + nlm_alpha_write_external, + 0, /* Write_export. */ +}; + +#define TARGET_LITTLE_NAME "nlm32-alpha" +#define TARGET_LITTLE_SYM nlmNAME (alpha_vec) +#define TARGET_BACKEND_DATA & nlm32_alpha_backend + +#include "nlm-target.h" |