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9783e04a64
check the result for NULL. Most set bfd_error to no_memory and return in that case; a few are harder to fix, and are marked with "FIXME <return type>". * elf32-hppa.c (hppa_elf_build_arg_reloc_stub hppa_elf_build_long_branch_stub): Check bfd_make_empty_symbol return. * linker.c (_bfd_generic_link_output_symbols _bfd_generic_link_write_global_symbol): Ditto * section.c (bfd_make_section_anyway): Ditto. * tekhex.c (find_chunk tekhex_mkobject): Check bfd_alloc. (first_phase): Ditto. FIXME void (tekhex_make_empty_symbol): Check bfd_zalloc. * sunos.c (sunos_read_dynamic_info): Check bfd_zalloc. (MY(read_dynamic_symbols) MY(read_dynamic_relocs)): Check bfd_alloc. * stringhash.c (_bfd_stringtab_hash_newfunc): Check bfd_hash_allocate. * srec.c: Indent. (fillup_symbols): Check bfd_alloc. FIXME void (srec_mkobject srec_get_section_contents srec_set_section_contents): Check bfd_alloc. (srec_make_empty_symbol): Check bfd_zalloc. * som.c (hppa_som_gen_reloc_type): Check bfd_alloc_by_size_t. (make_unique_section): Check bfd_alloc. (som_new_section_hook): Check bfd_zalloc. (bfd_som_attach_aux_hdr): Ditto. FIXME void * rs6000-core.c (rs6000coff_core_p): Check bfd_zalloc. * osf-core.c (osf_core_make_empty_symbol): Check bfd_zalloc. (osf_core_core_file_p): Check bfd_alloc. * oasys.c (oasys_slurp_symbol_table oasys_archive_p oasys_mkobject oasys_object_p oasys_new_section_hook oasys_set_section_contents): Check bfd_alloc. (oasys_slurp_section_data): Check bfd_zalloc and bfd_alloc. (oasys_make_empty_symbol): Check bfd_zalloc. * nlmcode.h (nlm_make_empty_symbol): Check bfd_zalloc. (nlm_slurp_symbol_table): Check bfd_zalloc and bfd_alloc. * nlm32-sparc.c (nlm_sparc_read_import): Check bfd_alloc. * nlm32-i386.c (nlm_i386_read_import): Check bfd_alloc. * nlm32-alpha.c (nlm_alpha_read_import): Check bfd_alloc. * linker.c (_bfd_link_hash_newfunc (generic_link_hash_newfunc (archive_hash_newfunc (_bfd_generic_link_add_one_symbol): Check bfd_hash_allocate. (_bfd_generic_final_link (_bfd_generic_link_output_symbols (default_indirect_link_order): Check bfd_alloc. (bfd_new_link_order): Check bfd_alloc_by_size_t. * irix-core.c (irix_core_make_empty_symbol): Check bfd_zalloc. * ieee.c: Indent. (read_id get_symbol get_section_entry ieee_archive_p ieee_object_p ieee_slurp_section_data ieee_new_section_hook): Check bfd_alloc. (do_one): Check bfd_alloc. Return a boolean. (ieee_slurp_section_data): Check it. (init_for_output): Check bfd_alloc. Return a boolean. (ieee_set_section_contents): Check it. (do_with_relocs): Check bfd_alloc. Return a boolean. (ieee_bfd_debug_info_accumulate): Ditto. FIXME void. (ieee_mkobject): Check bfd_zalloc. (ieee_make_empty_symbol): Check bfd_zmalloc. * hpux-core.c (hpux_core_make_empty_symbol): Check bfd_zalloc. * hppabsd-core.c (hppabsd_core_make_empty_symbol): Check bfd_zalloc. (hppabsd_core_core_file_p): Check bfd_zalloc. * hp300hpux.c (MY(slurp_symbol_table)): Check bfd_alloc. * elfcode.h (elf_new_section_hook): Check bfd_alloc. (bfd_section_from_phdr): Ditto. (write_relocs): Ditto. FIXME void (elf_map_symbols assign_section_numbers map_program_segments): Ditto. Return a boolean. (swap_out_syms): Ditto. Check elf_map_symbols. (elf_slurp_symbol_table): Check bfd_zalloc. (elf_slurp_reloca_table): Check bfd_alloc. (elf_slurp_reloc_table): Ditto. (elf_compute_section_file_positions): Check assign_section_numbers. (assign_file_positions_except_relocs): Return a boolean. Check map_program_segments. (elf_compute_section_file_positions): Check it. * elf32-mips.c (mips_elf_final_link): Check bfd_alloc. * elf32-hppa.c (hppa_elf_stub_branch_reloc): Check bfd_zmalloc and realloc. (hppa_elf_stub_reloc): Ditto. (hppa_elf_build_arg_reloc_stub): Check bfd_zalloc. (hppa_elf_build_long_branch_stub): Ditto. (elf32_hppa_backend_symbol_table_processing): Ditto. * ecoff.c (ecoff_set_symbol_info): Check bfd_alloc. Return a boolean. (ecoff_slurp_symbol_table): Check it. (ecoff_slurp_armap): Check bfd_alloc. (ecoff_write_armap): Check bfd_zalloc. (ecoff_link_hash_newfunc): Check bfd_hash_allocate and _bfd_link_hash_newfunc. (ecoff_link_add_externals): Check bfd_alloc. * ctor.c (bfd_constructor_entry): Check bfd_alloc. * coffgen.c (coff_real_object_p): Check bfd_alloc. (coff_renumber_symbols): Check bfd_alloc_by_size_t. Return a boolean. (coff_write_symbol): Check bfd_alloc. FIXME int (coff_write_linenumbers): Check bfd_alloc. Return a boolean. (coff_section_symbol): Check bfd_alloc_by_size_t. (coff_get_normalized_symtab): Check bfd_alloc. (coff_bfd_make_debug_symbol): Check bfd_zalloc. * libcoff-in.h: Change decls of coff_renumber_symbols, coff_write_linenumbers. * libcoff.h: Rebuilt. * coffcode.h (coff_write_object_contents): Check coff_renumber_symbols, coff_write_linenumbers. * coffcode.h: Indent. (coff_add_missing_symbols): Check bfd_alloc_by_size_t. Return a boolean. (coff_write_object_contents): Check it. * coff-alpha.c (alpha_relocate_section): Check bfd_alloc. * coff-mips.c (mips_relocate_section): Ditto. * archive.c (bfd_slurp_bsd_armap_f2): Check bfd_alloc value. (do_slurp_bsd_armap): Ditto. (compute_and_write_armap): Check bfd_realloc value. * aoutx.h (translate_from_native_sym_flags): Check bfd_alloc return value. Return boolean value. (NAME(aout,make_empty_symbol)): Check bfd_zalloc return value. (NAME(aout,slurp_symbol_table)): Check bf_alloc and bfd_zalloc return value. (add_to_stringtab): Ditto. FIXME void (aout_link_hash_newfunc): Check bfd_hash_allocate return value. (aout_link_add_symbols): Check bfd_alloc value. (translate_symbol_table): Check translate_from_native_sym_flags. * hp300hpux.c (MY(slurp_symbol_table)): Ditto. * aoutx.h (aout_link_hash_newfunc): Check _bfd_link_hash_newfunc. * opncls.c (bfd_zalloc bfd_realloc): Check result of bfd_alloc. * opncls.c (obstack_chunk_alloc): Define as malloc, not bfd_xmalloc_by_size_t. (_bfd_new_bfd): Check obstack_begin for 0 return. * ieee.c (obstack_chunk_alloc): Define as malloc, not bfd_xmalloc_by_size_t. (ieee_archive_p): Check obstack_begin for 0 return and obstack_finish for NULL return. * hash.c (obstack_chunk_alloc): Define as malloc, not bfd_xmalloc_by_size_t. (bfd_hash_table_init_n): Check obstack_begin for 0 return and obstack_finish for NULL return. (bfd_hash_lookup): Check obstack_alloc for NULL return. * ecofflink.c (obstack_chunk_alloc): Define as malloc, not bfd_xmalloc_by_size_t. bfd_ecoff_debug_accumulate bfd_ecoff_debug_accumulate_other): Check obstack_alloc. (add_file_shuffle add_memory_shuffle): Check obstack_alloc for NULL return. Return boolean, not void. (bfd_ecoff_debug_init): Check obstack_begin for 0 return. (bfd_ecoff_debug_accumulate): Check add_file_shuffle and add_memory_shuffle return. (string_hash_newfunc): Check bfd_hash_allocate and bfd_hash_newfunc. (bfd_ecoff_debug_accumulate): Check bfd_alloc. (ecoff_add_string): Check add_memory_shuffle return. * libbfd-in.h (xmalloc, bfd_xmalloc, bfd_xmalloc_by_size_t): Remove decls. * libbfd.h: Rebuilt.
477 lines
13 KiB
C
477 lines
13 KiB
C
/* Support for 32-bit i386 NLM (NetWare Loadable Module)
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Copyright (C) 1993 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#define ARCH_SIZE 32
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#include "nlm/i386-ext.h"
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#define Nlm_External_Fixed_Header Nlm32_i386_External_Fixed_Header
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#include "libnlm.h"
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static boolean nlm_i386_read_reloc
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PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
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static boolean nlm_i386_write_import
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PARAMS ((bfd *, asection *, arelent *));
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static boolean nlm_i386_mangle_relocs
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PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
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static boolean nlm_i386_read_import
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PARAMS ((bfd *, nlmNAME(symbol_type) *));
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static boolean nlm_i386_write_external
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PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
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/* Adjust the reloc location by an absolute value. */
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static reloc_howto_type nlm_i386_abs_howto =
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HOWTO (0, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false); /* pcrel_offset */
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/* Adjust the reloc location by a PC relative displacement. */
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static reloc_howto_type nlm_i386_pcrel_howto =
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HOWTO (1, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"DISP32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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true); /* pcrel_offset */
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/* Read a NetWare i386 reloc. */
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static boolean
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nlm_i386_read_reloc (abfd, sym, secp, rel)
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bfd *abfd;
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nlmNAME(symbol_type) *sym;
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asection **secp;
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arelent *rel;
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{
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bfd_byte temp[4];
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bfd_vma val;
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const char *name;
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if (bfd_read (temp, sizeof (temp), 1, abfd) != sizeof (temp))
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{
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bfd_error = system_call_error;
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return false;
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}
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val = bfd_get_32 (abfd, temp);
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/* The value is an offset into either the code or data segment.
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This is the location which needs to be adjusted.
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If this is a relocation fixup rather than an imported symbol (the
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sym argument is NULL) then the high bit is 0 if the location
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needs to be adjusted by the address of the data segment, or 1 if
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the location needs to be adjusted by the address of the code
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segment. If this is an imported symbol, then the high bit is 0
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if the location is 0 if the location should be adjusted by the
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offset to the symbol, or 1 if the location should adjusted by the
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absolute value of the symbol.
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The second most significant bit is 0 if the value is an offset
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into the data segment, or 1 if the value is an offset into the
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code segment.
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All this translates fairly easily into a BFD reloc. */
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if (sym == NULL)
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{
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if ((val & NLM_HIBIT) == 0)
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name = NLM_INITIALIZED_DATA_NAME;
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else
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{
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name = NLM_CODE_NAME;
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val &=~ NLM_HIBIT;
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}
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rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
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rel->howto = &nlm_i386_abs_howto;
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}
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else
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{
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/* In this case we do not need to set the sym_ptr_ptr field. */
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rel->sym_ptr_ptr = NULL;
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if ((val & NLM_HIBIT) == 0)
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rel->howto = &nlm_i386_pcrel_howto;
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else
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{
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rel->howto = &nlm_i386_abs_howto;
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val &=~ NLM_HIBIT;
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}
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}
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if ((val & (NLM_HIBIT >> 1)) == 0)
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*secp = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
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else
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{
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*secp = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
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val &=~ (NLM_HIBIT >> 1);
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}
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rel->address = val;
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rel->addend = 0;
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return true;
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}
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/* Write a NetWare i386 reloc. */
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static boolean
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nlm_i386_write_import (abfd, sec, rel)
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bfd *abfd;
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asection *sec;
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arelent *rel;
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{
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asymbol *sym;
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bfd_vma val;
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bfd_byte temp[4];
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/* NetWare only supports two kinds of relocs. We should check
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special_function here, as well, but at the moment coff-i386
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relocs uses a special_function which does not affect what we do
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here. */
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if (rel->addend != 0
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|| rel->howto == NULL
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|| rel->howto->rightshift != 0
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|| rel->howto->size != 2
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|| rel->howto->bitsize != 32
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|| rel->howto->bitpos != 0
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|| rel->howto->src_mask != 0xffffffff
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|| rel->howto->dst_mask != 0xffffffff)
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{
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bfd_error = invalid_operation;
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return false;
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}
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sym = *rel->sym_ptr_ptr;
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/* The value we write out is the offset into the appropriate
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segment. This offset is the section vma, adjusted by the vma of
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the lowest section in that segment, plus the address of the
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relocation. */
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val = bfd_get_section_vma (abfd, sec) + rel->address;
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/* The second most significant bit is 0 if the value is an offset
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into the data segment, or 1 if the value is an offset into the
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code segment. */
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if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
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{
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val -= nlm_get_text_low (abfd);
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val |= NLM_HIBIT >> 1;
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}
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else
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val -= nlm_get_data_low (abfd);
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if (bfd_get_section (sym) != &bfd_und_section)
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{
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/* NetWare only supports absolute internal relocs. */
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if (rel->howto->pc_relative)
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{
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bfd_error = invalid_operation;
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return false;
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}
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/* The high bit is 1 if the reloc is against the code section, 0
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if against the data section. */
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if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
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val |= NLM_HIBIT;
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}
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else
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{
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/* The high bit is 1 if this is an absolute reloc, 0 if it is PC
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relative. */
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if (! rel->howto->pc_relative)
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val |= NLM_HIBIT;
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else
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{
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/* PC relative relocs on NetWare must be pcrel_offset. */
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if (! rel->howto->pcrel_offset)
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{
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bfd_error = invalid_operation;
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return false;
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}
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}
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}
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bfd_put_32 (abfd, val, temp);
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if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp))
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{
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bfd_error = system_call_error;
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return false;
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}
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return true;
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}
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/* I want to be able to use objcopy to turn a i386 a.out or COFF file
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into a NetWare i386 module. That means that the relocs from the
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source file have to be mapped into relocs that apply to the target
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file. This function is called by nlm_set_section_contents to give
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it a chance to rework the relocs.
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This is actually a fairly general concept. However, this is not a
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general implementation. */
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static boolean
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nlm_i386_mangle_relocs (abfd, sec, data, offset, count)
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bfd *abfd;
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asection *sec;
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PTR data;
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bfd_vma offset;
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bfd_size_type count;
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{
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arelent **rel_ptr_ptr, **rel_end;
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rel_ptr_ptr = sec->orelocation;
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rel_end = rel_ptr_ptr + sec->reloc_count;
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for (; rel_ptr_ptr < rel_end; rel_ptr_ptr++)
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{
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arelent *rel;
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asymbol *sym;
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bfd_vma addend;
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rel = *rel_ptr_ptr;
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sym = *rel->sym_ptr_ptr;
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/* Note that no serious harm will ensue if we fail to change a
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reloc. We will wind up failing in nlm_i386_write_import. */
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/* Make sure this reloc is within the data we have. We only 4
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byte relocs here, so we insist on having 4 bytes. */
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if (rel->address < offset
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|| rel->address + 4 > offset + count)
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continue;
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/* NetWare doesn't support reloc addends, so we get rid of them
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here by simply adding them into the object data. We handle
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the symbol value, if any, the same way. */
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addend = rel->addend + sym->value;
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/* The value of a symbol is the offset into the section. If the
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symbol is in the .bss segment, we need to include the size of
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the data segment in the offset as well. Fortunately, we know
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that at this point the size of the data section is in the NLM
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header. */
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if (((bfd_get_section_flags (abfd, bfd_get_section (sym))
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& SEC_LOAD) == 0)
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&& ((bfd_get_section_flags (abfd, bfd_get_section (sym))
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& SEC_ALLOC) != 0))
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addend += nlm_fixed_header (abfd)->dataImageSize;
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if (addend != 0
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&& rel->howto != NULL
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&& rel->howto->rightshift == 0
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&& rel->howto->size == 2
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&& rel->howto->bitsize == 32
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&& rel->howto->bitpos == 0
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&& rel->howto->src_mask == 0xffffffff
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&& rel->howto->dst_mask == 0xffffffff)
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{
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bfd_vma val;
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val = bfd_get_32 (abfd, (bfd_byte *) data + rel->address - offset);
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val += addend;
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bfd_put_32 (abfd, val, (bfd_byte *) data + rel->address - offset);
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rel->addend = 0;
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}
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/* NetWare uses a reloc with pcrel_offset set. We adjust
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pc_relative relocs accordingly. We are going to change the
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howto field, so we can only do this if the current one is
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compatible. We should check special_function here, but at
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the moment coff-i386 uses a special_function which does not
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affect what we are doing here. */
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if (rel->howto != NULL
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&& rel->howto->pc_relative
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&& ! rel->howto->pcrel_offset
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&& rel->howto->rightshift == 0
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&& rel->howto->size == 2
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&& rel->howto->bitsize == 32
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&& rel->howto->bitpos == 0
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&& rel->howto->src_mask == 0xffffffff
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&& rel->howto->dst_mask == 0xffffffff)
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{
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bfd_vma val;
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/* When pcrel_offset is not set, it means that the negative
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of the address of the memory location is stored in the
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memory location. We must add it back in. */
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val = bfd_get_32 (abfd, (bfd_byte *) data + rel->address - offset);
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val += rel->address;
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bfd_put_32 (abfd, val, (bfd_byte *) data + rel->address - offset);
|
|
|
|
rel->howto = &nlm_i386_pcrel_howto;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Read a NetWare i386 import record */
|
|
static boolean
|
|
nlm_i386_read_import (abfd, sym)
|
|
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 */
|
|
|
|
if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
|
|
!= sizeof (symlength))
|
|
{
|
|
bfd_error = system_call_error;
|
|
return (false);
|
|
}
|
|
sym -> symbol.the_bfd = abfd;
|
|
sym -> symbol.name = bfd_alloc (abfd, symlength + 1);
|
|
if (!sym -> symbol.name)
|
|
{
|
|
bfd_error = no_memory;
|
|
return false;
|
|
}
|
|
if (bfd_read ((PTR) sym -> symbol.name, symlength, 1, abfd)
|
|
!= symlength)
|
|
{
|
|
bfd_error = system_call_error;
|
|
return (false);
|
|
}
|
|
sym -> symbol.flags = 0;
|
|
sym -> symbol.value = 0;
|
|
sym -> symbol.section = &bfd_und_section;
|
|
if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
|
|
{
|
|
bfd_error = system_call_error;
|
|
return (false);
|
|
}
|
|
rcount = bfd_h_get_32 (abfd, temp);
|
|
nlm_relocs = ((struct nlm_relent *)
|
|
bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
|
|
if (!nlm_relocs)
|
|
{
|
|
bfd_error = no_memory;
|
|
return false;
|
|
}
|
|
sym -> relocs = nlm_relocs;
|
|
sym -> rcnt = 0;
|
|
while (sym -> rcnt < rcount)
|
|
{
|
|
asection *section;
|
|
|
|
if (nlm_i386_read_reloc (abfd, sym, §ion,
|
|
&nlm_relocs -> reloc)
|
|
== false)
|
|
return false;
|
|
nlm_relocs -> section = section;
|
|
nlm_relocs++;
|
|
sym -> rcnt++;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Write out an external reference. */
|
|
|
|
static boolean
|
|
nlm_i386_write_external (abfd, count, sym, relocs)
|
|
bfd *abfd;
|
|
bfd_size_type count;
|
|
asymbol *sym;
|
|
struct reloc_and_sec *relocs;
|
|
{
|
|
int i;
|
|
bfd_byte len;
|
|
unsigned char temp[NLM_TARGET_LONG_SIZE];
|
|
|
|
len = strlen (sym->name);
|
|
if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte))
|
|
|| bfd_write (sym->name, len, 1, abfd) != len)
|
|
{
|
|
bfd_error = system_call_error;
|
|
return false;
|
|
}
|
|
|
|
bfd_put_32 (abfd, count, temp);
|
|
if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp))
|
|
{
|
|
bfd_error = system_call_error;
|
|
return false;
|
|
}
|
|
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
if (nlm_i386_write_import (abfd, relocs[i].sec,
|
|
relocs[i].rel) == false)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#include "nlmswap.h"
|
|
|
|
static const struct nlm_backend_data nlm32_i386_backend =
|
|
{
|
|
"NetWare Loadable Module\032",
|
|
sizeof (Nlm32_i386_External_Fixed_Header),
|
|
0, /* optional_prefix_size */
|
|
bfd_arch_i386,
|
|
0,
|
|
false,
|
|
0, /* backend_object_p */
|
|
0, /* write_prefix_func */
|
|
nlm_i386_read_reloc,
|
|
nlm_i386_mangle_relocs,
|
|
nlm_i386_read_import,
|
|
nlm_i386_write_import,
|
|
0, /* set_public_section */
|
|
0, /* get_public_offset */
|
|
nlm_swap_fixed_header_in,
|
|
nlm_swap_fixed_header_out,
|
|
nlm_i386_write_external,
|
|
0, /* write_export */
|
|
};
|
|
|
|
#define TARGET_LITTLE_NAME "nlm32-i386"
|
|
#define TARGET_LITTLE_SYM nlmNAME(i386_vec)
|
|
#define TARGET_BACKEND_DATA &nlm32_i386_backend
|
|
|
|
#include "nlm-target.h"
|