diff options
Diffstat (limited to 'binutils-2.25/bfd/nlm32-ppc.c')
| -rw-r--r-- | binutils-2.25/bfd/nlm32-ppc.c | 987 |
1 files changed, 987 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/nlm32-ppc.c b/binutils-2.25/bfd/nlm32-ppc.c new file mode 100644 index 00000000..ef5bfa98 --- /dev/null +++ b/binutils-2.25/bfd/nlm32-ppc.c @@ -0,0 +1,987 @@ +/* Support for 32-bit PowerPC NLM (NetWare Loadable Module) + Copyright 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004, 2005, + 2007, 2012 Free Software Foundation, Inc. + + 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. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" + +/* The format of a PowerPC NLM changed. Define OLDFORMAT to get the + old format. */ + +#define ARCH_SIZE 32 + +#include "nlm/ppc-ext.h" +#define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header + +#include "libnlm.h" + +#ifdef OLDFORMAT + +/* The prefix header is only used in the old format. */ + +/* PowerPC 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_powerpc_backend_object_p (bfd *abfd) +{ + struct nlm32_powerpc_external_prefix_header s; + + if (bfd_bread (& s, (bfd_size_type) sizeof s, abfd) != sizeof s) + return FALSE; + + if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0 + || H_GET_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION) + return FALSE; + + return TRUE; +} + +/* Write out the prefix. */ + +static bfd_boolean +nlm_powerpc_write_prefix (bfd *abfd) +{ + struct nlm32_powerpc_external_prefix_header s; + + memset (&s, 0, sizeof s); + memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature); + H_PUT_32 (abfd, NLM32_POWERPC_HEADER_VERSION, s.headerVersion); + H_PUT_32 (abfd, 0, s.origins); + + /* FIXME: What should we do about the date? */ + + if (bfd_bwrite (& s, (bfd_size_type) sizeof s, abfd) != sizeof s) + return FALSE; + + return TRUE; +} + +/* This reloc handling is only applicable to the old format. */ + +/* How to process the various reloc types. PowerPC NLMs use XCOFF + reloc types, and I have just copied the XCOFF reloc table here. */ + +static reloc_howto_type nlm_powerpc_howto_table[] = +{ + /* Standard 32 bit relocation. */ + HOWTO (0, /* 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. */ + "R_POS", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* 32 bit relocation, but store negative value. */ + HOWTO (1, /* 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. */ + "R_NEG", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* 32 bit PC relative relocation. */ + HOWTO (2, /* 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. */ + "R_REL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* 16 bit TOC relative relocation. */ + HOWTO (3, /* Type. */ + 0, /* Rightshift. */ + 1, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_TOC", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* I don't really know what this is. */ + HOWTO (4, /* Type. */ + 1, /* 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. */ + "R_RTB", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* External TOC relative symbol. */ + HOWTO (5, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_GL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Local TOC relative symbol. */ + HOWTO (6, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_TCL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + { 7 }, + + /* Non modifiable absolute branch. */ + HOWTO (8, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 26, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_BA", /* Name. */ + TRUE, /* Partial_inplace. */ + 0x3fffffc, /* Source mask. */ + 0x3fffffc, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + { 9 }, + + /* Non modifiable relative branch. */ + HOWTO (0xa, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 26, /* Bitsize. */ + TRUE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_BR", /* Name. */ + TRUE, /* Partial_inplace. */ + 0x3fffffc, /* Source mask. */ + 0x3fffffc, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + { 0xb }, + + /* Indirect load. */ + HOWTO (0xc, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_RL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Load address. */ + HOWTO (0xd, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_RLA", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + { 0xe }, + + /* Non-relocating reference. */ + HOWTO (0xf, /* 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. */ + "R_REF", /* Name. */ + FALSE, /* Partial_inplace. */ + 0, /* Source mask. */ + 0, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + { 0x10 }, + { 0x11 }, + + /* TOC relative indirect load. */ + HOWTO (0x12, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_TRL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* TOC relative load address. */ + HOWTO (0x13, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_TRLA", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable relative branch. */ + HOWTO (0x14, /* Type. */ + 1, /* 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. */ + "R_RRTBI", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable absolute branch. */ + HOWTO (0x15, /* Type. */ + 1, /* 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. */ + "R_RRTBA", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable call absolute indirect. */ + HOWTO (0x16, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_CAI", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable call relative. */ + HOWTO (0x17, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_REL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable branch absolute. */ + HOWTO (0x18, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_RBA", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable branch absolute. */ + HOWTO (0x19, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_RBAC", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable branch relative. */ + HOWTO (0x1a, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 26, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_signed, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_REL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE), /* PC rel offset. */ + + /* Modifiable branch absolute. */ + HOWTO (0x1b, /* Type. */ + 0, /* Rightshift. */ + 2, /* Size (0 = byte, 1 = short, 2 = long). */ + 16, /* Bitsize. */ + FALSE, /* PC relative. */ + 0, /* Bitpos. */ + complain_overflow_bitfield, /* Complain_on_overflow. */ + 0, /* Special_function. */ + "R_REL", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffff, /* Source mask. */ + 0xffff, /* Dest mask. */ + FALSE) /* PC rel offset. */ +}; + +#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \ + / sizeof nlm_powerpc_howto_table[0]) + +/* Read a PowerPC NLM reloc. */ + +static bfd_boolean +nlm_powerpc_read_reloc (bfd *abfd, + nlmNAME (symbol_type) *sym, + asection **secp, + arelent *rel) +{ + struct nlm32_powerpc_external_reloc ext; + bfd_vma l_vaddr; + unsigned long l_symndx; + int l_rtype; + int l_rsecnm; + asection *code_sec, *data_sec, *bss_sec; + + /* Read the reloc from the file. */ + if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) + return FALSE; + + /* Swap in the fields. */ + l_vaddr = H_GET_32 (abfd, ext.l_vaddr); + l_symndx = H_GET_32 (abfd, ext.l_symndx); + l_rtype = H_GET_16 (abfd, ext.l_rtype); + l_rsecnm = H_GET_16 (abfd, ext.l_rsecnm); + + /* Get the sections now, for convenience. */ + code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); + + /* Work out the arelent fields. */ + if (sym != NULL) + /* This is an import. sym_ptr_ptr is filled in by + nlm_canonicalize_reloc. */ + rel->sym_ptr_ptr = NULL; + else + { + asection *sec; + + if (l_symndx == 0) + sec = code_sec; + else if (l_symndx == 1) + sec = data_sec; + else if (l_symndx == 2) + sec = bss_sec; + else + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + rel->sym_ptr_ptr = sec->symbol_ptr_ptr; + } + + rel->addend = 0; + + BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT); + + rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff); + + BFD_ASSERT (rel->howto->name != NULL + && ((l_rtype & 0x8000) != 0 + ? (rel->howto->complain_on_overflow + == complain_overflow_signed) + : (rel->howto->complain_on_overflow + == complain_overflow_bitfield)) + && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1); + + if (l_rsecnm == 0) + *secp = code_sec; + else if (l_rsecnm == 1) + { + *secp = data_sec; + l_vaddr -= code_sec->size; + } + else + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + rel->address = l_vaddr; + + return TRUE; +} + +#else /* not OLDFORMAT */ + +/* There is only one type of reloc in a PowerPC NLM. */ + +static reloc_howto_type nlm_powerpc_howto = + HOWTO (0, /* 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. */ + "32", /* Name. */ + TRUE, /* Partial_inplace. */ + 0xffffffff, /* Source mask. */ + 0xffffffff, /* Dest mask. */ + FALSE); /* PC rel_offset. */ + +/* Read a PowerPC NLM reloc. */ + +static bfd_boolean +nlm_powerpc_read_reloc (bfd *abfd, + nlmNAME (symbol_type) *sym, + asection **secp, + arelent *rel) +{ + bfd_byte temp[4]; + bfd_vma val; + const char *name; + + if (bfd_bread (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) + return FALSE; + + val = bfd_get_32 (abfd, temp); + + /* The value is a word offset into either the code or data segment. + This is the location which needs to be adjusted. + + The high bit is 0 if the value is an offset into the data + segment, or 1 if the value is an offset into the text segment. + + If this is a relocation fixup rather than an imported symbol (the + sym argument is NULL), then the second most significant bit is 0 + if the address of the data segment should be added to the + location addressed by the value, or 1 if the address of the text + segment should be added. + + If this is an imported symbol, the second most significant bit is + not used and must be 0. */ + + if ((val & NLM_HIBIT) == 0) + name = NLM_INITIALIZED_DATA_NAME; + else + { + name = NLM_CODE_NAME; + val &=~ NLM_HIBIT; + } + *secp = bfd_get_section_by_name (abfd, name); + + if (sym == NULL) + { + if ((val & (NLM_HIBIT >> 1)) == 0) + name = NLM_INITIALIZED_DATA_NAME; + else + { + name = NLM_CODE_NAME; + val &=~ (NLM_HIBIT >> 1); + } + rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr; + } + + rel->howto = & nlm_powerpc_howto; + rel->address = val << 2; + rel->addend = 0; + + return TRUE; +} + +#endif /* not OLDFORMAT */ + +/* Mangle PowerPC NLM relocs for output. */ + +static bfd_boolean +nlm_powerpc_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 a PowerPC NLM import record */ + +static bfd_boolean +nlm_powerpc_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; + + 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); + nlm_relocs = bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)); + if (nlm_relocs == NULL) + return FALSE; + sym -> relocs = nlm_relocs; + sym -> rcnt = 0; + while (sym -> rcnt < rcount) + { + asection *section; + + if (! nlm_powerpc_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc)) + return FALSE; + nlm_relocs -> section = section; + nlm_relocs++; + sym -> rcnt++; + } + return TRUE; +} + +#ifndef OLDFORMAT + +/* Write a PowerPC NLM reloc. */ + +static bfd_boolean +nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel) +{ + asymbol *sym; + bfd_vma val; + bfd_byte temp[4]; + + /* PowerPC NetWare only supports one kind of reloc. */ + if (rel->addend != 0 + || rel->howto == NULL + || rel->howto->rightshift != 0 + || rel->howto->size != 2 + || rel->howto->bitsize != 32 + || rel->howto->bitpos != 0 + || rel->howto->pc_relative + || (rel->howto->src_mask != 0xffffffff && rel->addend != 0) + || rel->howto->dst_mask != 0xffffffff) + { + bfd_set_error (bfd_error_invalid_operation); + return FALSE; + } + + sym = *rel->sym_ptr_ptr; + + /* The value we write out is the offset into the appropriate + segment, rightshifted by two. This offset is the section vma, + adjusted by the vma of the lowest section in that segment, plus + the address of the relocation. */ + val = bfd_get_section_vma (abfd, sec) + rel->address; + if ((val & 3) != 0) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + val >>= 2; + + /* The high bit is 0 if the reloc is in the data section, or 1 if + the reloc is in the code section. */ + if (bfd_get_section_flags (abfd, sec) & SEC_DATA) + val -= nlm_get_data_low (abfd); + else + { + val -= nlm_get_text_low (abfd); + val |= NLM_HIBIT; + } + + if (! bfd_is_und_section (bfd_get_section (sym))) + { + /* This is an internal relocation fixup. The second most + significant bit is 0 if this is a reloc against the data + segment, or 1 if it is a reloc against the text segment. */ + if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE) + val |= NLM_HIBIT >> 1; + } + + bfd_put_32 (abfd, val, temp); + if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) + return FALSE; + + return TRUE; +} + +#else /* OLDFORMAT */ + +/* This is used for the reloc handling in the old format. */ + +/* Write a PowerPC NLM reloc. */ + +static bfd_boolean +nlm_powerpc_write_reloc (bfd *abfd, + asection *sec, + arelent *rel, + int indx) +{ + struct nlm32_powerpc_external_reloc ext; + asection *code_sec, *data_sec, *bss_sec; + asymbol *sym; + asection *symsec; + unsigned long l_symndx; + int l_rtype; + int l_rsecnm; + reloc_howto_type *howto; + bfd_size_type address; + + /* Get the sections now, for convenience. */ + code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); + + sym = *rel->sym_ptr_ptr; + symsec = bfd_get_section (sym); + if (indx != -1) + { + BFD_ASSERT (bfd_is_und_section (symsec)); + l_symndx = indx + 3; + } + else + { + if (symsec == code_sec) + l_symndx = 0; + else if (symsec == data_sec) + l_symndx = 1; + else if (symsec == bss_sec) + l_symndx = 2; + else + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + } + + H_PUT_32 (abfd, l_symndx, ext.l_symndx); + + for (howto = nlm_powerpc_howto_table; + howto < nlm_powerpc_howto_table + HOWTO_COUNT; + howto++) + { + if (howto->rightshift == rel->howto->rightshift + && howto->size == rel->howto->size + && howto->bitsize == rel->howto->bitsize + && howto->pc_relative == rel->howto->pc_relative + && howto->bitpos == rel->howto->bitpos + && (howto->partial_inplace == rel->howto->partial_inplace + || (! rel->howto->partial_inplace + && rel->addend == 0)) + && (howto->src_mask == rel->howto->src_mask + || (rel->howto->src_mask == 0 + && rel->addend == 0)) + && howto->dst_mask == rel->howto->dst_mask + && howto->pcrel_offset == rel->howto->pcrel_offset) + break; + } + if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + l_rtype = howto->type; + if (howto->complain_on_overflow == complain_overflow_signed) + l_rtype |= 0x8000; + l_rtype |= (howto->bitsize - 1) << 8; + H_PUT_16 (abfd, l_rtype, ext.l_rtype); + + address = rel->address; + + if (sec == code_sec) + l_rsecnm = 0; + else if (sec == data_sec) + { + l_rsecnm = 1; + address += code_sec->size; + } + else + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + H_PUT_16 (abfd, l_rsecnm, ext.l_rsecnm); + H_PUT_32 (abfd, address, ext.l_vaddr); + + if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) + return FALSE; + + return TRUE; +} + +/* Write a PowerPC NLM import. */ + +static bfd_boolean +nlm_powerpc_write_import (bfd * abfd, asection * sec, arelent * rel) +{ + return nlm_powerpc_write_reloc (abfd, sec, rel, -1); +} + +#endif /* OLDFORMAT */ + +/* Write a PowerPC NLM external symbol. This routine keeps a static + count of the symbol index. FIXME: I don't know if this is + necessary, and the index never gets reset. */ + +static bfd_boolean +nlm_powerpc_write_external (bfd *abfd, + bfd_size_type count, + asymbol *sym, + struct reloc_and_sec *relocs) +{ + unsigned int i; + bfd_byte len; + unsigned char temp[NLM_TARGET_LONG_SIZE]; +#ifdef OLDFORMAT + static int indx; +#endif + + 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, temp); + if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) + return FALSE; + + for (i = 0; i < count; i++) + { +#ifndef OLDFORMAT + if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel)) + return FALSE; +#else + if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec, + relocs[i].rel, indx)) + return FALSE; +#endif + } + +#ifdef OLDFORMAT + ++indx; +#endif + + return TRUE; +} + +#ifndef OLDFORMAT + +/* PowerPC Netware uses a word offset, not a byte offset, for public + symbols. */ + +/* Set the section for a public symbol. */ + +static bfd_boolean +nlm_powerpc_set_public_section (bfd *abfd, nlmNAME (symbol_type) *sym) +{ + if (sym->symbol.value & NLM_HIBIT) + { + sym->symbol.value &= ~NLM_HIBIT; + sym->symbol.flags |= BSF_FUNCTION; + sym->symbol.section = + bfd_get_section_by_name (abfd, NLM_CODE_NAME); + } + else + sym->symbol.section = + bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + + sym->symbol.value <<= 2; + + return TRUE; +} + +/* Get the offset to write out for a public symbol. */ + +static bfd_vma +nlm_powerpc_get_public_offset (bfd *abfd, asymbol *sym) +{ + bfd_vma offset; + asection *sec; + + offset = bfd_asymbol_value (sym); + sec = bfd_get_section (sym); + if (sec->flags & SEC_CODE) + { + offset -= nlm_get_text_low (abfd); + offset |= NLM_HIBIT; + } + else if (sec->flags & (SEC_DATA | SEC_ALLOC)) + { + /* SEC_ALLOC is for the .bss section. */ + offset -= nlm_get_data_low (abfd); + } + else + { + /* We can't handle an exported symbol that is not in the code or + data segment. */ + bfd_set_error (bfd_error_invalid_operation); + /* FIXME: No way to return error. */ + abort (); + } + + return offset; +} + +#endif /* ! defined (OLDFORMAT) */ + +#include "nlmswap.h" + +static const struct nlm_backend_data nlm32_powerpc_backend = +{ + "NetWare PowerPC Module \032", + sizeof (Nlm32_powerpc_External_Fixed_Header), +#ifndef OLDFORMAT + 0, /* Optional_prefix_size. */ +#else + sizeof (struct nlm32_powerpc_external_prefix_header), +#endif + bfd_arch_powerpc, + 0, + FALSE, +#ifndef OLDFORMAT + 0, /* Backend_object_p. */ + 0, /* Write_prefix. */ +#else + nlm_powerpc_backend_object_p, + nlm_powerpc_write_prefix, +#endif + nlm_powerpc_read_reloc, + nlm_powerpc_mangle_relocs, + nlm_powerpc_read_import, + nlm_powerpc_write_import, +#ifndef OLDFORMAT + nlm_powerpc_set_public_section, + nlm_powerpc_get_public_offset, +#else + 0, /* Set_public_section. */ + 0, /* Get_public_offset. */ +#endif + nlm_swap_fixed_header_in, + nlm_swap_fixed_header_out, + nlm_powerpc_write_external, + 0, /* Write_export. */ +}; + +#define TARGET_BIG_NAME "nlm32-powerpc" +#define TARGET_BIG_SYM nlmNAME (powerpc_vec) +#define TARGET_BACKEND_DATA & nlm32_powerpc_backend + +#include "nlm-target.h" |