Apply patch from Richard Gorton <gorton@scrugs.lkg.dec.com> to implement
--emit-relocs switch to the linker to preserve relocs in an output executable
This commit is contained in:
Nick Clifton
parent
f4bd37dad4
commit
a712da2085
9 changed files with 60 additions and 14 deletions
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@ -1,3 +1,13 @@
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2000-05-17 S. Bharadwaj Yadavalli <sby@scrugs.lkg.dec.com>
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Rick Gorton <gorton@scrugs.lkg.dec.com>
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* elflink.h: Add emitrelocations support: when enabled, relocation
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information and relocation sections are put into final output
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executables. If the emitrelocations flag is set, do the following:
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(elf_bfd_final_link): Emit relocation sections.
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(elf_link_input_bfd): Compute relocation section contents.
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(elf_gc_sections): Don't clean relocation sections.
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2000-05-16 Catherine Moore <clm@cygnux.com>
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* som.c (som_decode_symclass): Recognize weak symbols.
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@ -1246,7 +1256,7 @@ Thu Feb 10 20:07:50 GMT 2000 Toshiyasu Morita (toshi.morita@sega.com)
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2000-02-08 Mark Elbrecht <snowball3@bigfoot.com>
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* coff-go32.c: Update comment. Update copyright.
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2000-01-27 Thomas de Lellis <tdel@windriver.com>
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* syms.c (bfd_decode_symclass)
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@ -2603,8 +2613,8 @@ Mon Jul 19 14:03:44 1999 Mark P. Mitchell <mark@codesourcery.com>
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* coffcode.h (CREATE_BIG_COFF_TARGET_VEC): New macro.
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(CREATE_LITTLE_COFF_TARGET_VEC): New macro.
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* aix386-core.c: Initialise new field of bfd_target structure.
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* aout-adobe.c: Initialise new field of bfd_target structure.
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* aix386-core.c: Initialise new field of bfd_target structure.
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* aout-adobe.c: Initialise new field of bfd_target structure.
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* aout-arm.c: Initialise new field of bfd_target structure.
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* aout-target.h: Initialise new field of bfd_target structure.
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* aout-tic30.c: Initialise new field of bfd_target structure.
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@ -357,7 +357,6 @@ elf_link_add_archive_symbols (abfd, info)
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}
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/* We need to include this archive member. */
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element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
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if (element == (bfd *) NULL)
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goto error_return;
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@ -4104,7 +4103,7 @@ elf_bfd_final_link (abfd, info)
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the linker has decided to not include. */
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sec->linker_mark = true;
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if (info->relocateable)
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if (info->relocateable || info->emitrelocations)
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o->reloc_count += sec->reloc_count;
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if (sec->_raw_size > max_contents_size)
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@ -4172,7 +4171,7 @@ elf_bfd_final_link (abfd, info)
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/* Figure out how many relocations we will have in each section.
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Just using RELOC_COUNT isn't good enough since that doesn't
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maintain a separate value for REL vs. RELA relocations. */
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if (info->relocateable)
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if (info->relocateable || info->emitrelocations)
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for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
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for (o = sub->sections; o != NULL; o = o->next)
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{
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@ -4280,7 +4279,7 @@ elf_bfd_final_link (abfd, info)
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/* Start writing out the symbol table. The first symbol is always a
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dummy symbol. */
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if (info->strip != strip_all || info->relocateable)
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if (info->strip != strip_all || info->relocateable || info->emitrelocations)
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{
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elfsym.st_value = 0;
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elfsym.st_size = 0;
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@ -4313,7 +4312,7 @@ elf_bfd_final_link (abfd, info)
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symbols have no names. We store the index of each one in the
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index field of the section, so that we can find it again when
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outputting relocs. */
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if (info->strip != strip_all || info->relocateable)
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if (info->strip != strip_all || info->relocateable || info->emitrelocations)
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{
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elfsym.st_size = 0;
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elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
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@ -4324,7 +4323,7 @@ elf_bfd_final_link (abfd, info)
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if (o != NULL)
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o->target_index = bfd_get_symcount (abfd);
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elfsym.st_shndx = i;
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if (info->relocateable || o == NULL)
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if (info->relocateable || info->emitrelocations || o == NULL)
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elfsym.st_value = 0;
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else
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elfsym.st_value = o->vma;
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@ -5492,7 +5491,7 @@ elf_link_input_bfd (finfo, input_bfd)
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finfo->sections))
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return false;
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if (finfo->info->relocateable)
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if (finfo->info->relocateable || finfo->info->emitrelocations)
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{
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Elf_Internal_Rela *irela;
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Elf_Internal_Rela *irelaend;
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@ -1,3 +1,8 @@
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2000-05-17 S. Bharadwaj Yadavalli <sby@scrugs.lkg.dec.com>
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Rick Gorton <gorton@scrugs.lkg.dec.com>
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* bfdlink.h (struct bfd_link_info): Add emitrelocations flag.
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2000-05-08 Alan Modra <alan@linuxcare.com.au>
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* dis-asm.h (print_insn_tic54x): Declare.
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@ -269,7 +274,7 @@ Mon Feb 1 21:05:46 1999 Catherine Moore <clm@cygnus.com>
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* dis-asm.h (print_insn_i386_att): Declare.
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(print_insn_i386_intel): Declare.
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998-12-30 Michael Meissner <meissner@cygnus.com>
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1998-12-30 Michael Meissner <meissner@cygnus.com>
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* dis-asm.h (INIT_DISASSEMBLE_INFO_NO_ARCH): Cast STREAM and
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FPRINTF_FUNC to avoid compiler warnings.
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@ -299,8 +304,7 @@ Tue Dec 8 00:30:31 1998 Elena Zannoni <ezannoni@kwikemart.cygnus.com>
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(demangling_styles): add new edg_demangling style
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(EDG_DEMANGLING_STYLE_STRING): new macro
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(EDG_DEMANGLING): new macro
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* demangle.h (DMGL_HP): new macro, for HP/aCC compiler.
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(DMGL_HP): new macro, for HP/aCC compiler.
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(DMGL_STYLE_MASK): modify to include new HP's style.
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(demangling_styles): add new hp_demangling value.
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(HP_DEMANGLING_STYLE_STRING): new macro.
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@ -179,6 +179,8 @@ struct bfd_link_info
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const struct bfd_link_callbacks *callbacks;
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/* true if BFD should generate a relocateable object file. */
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boolean relocateable;
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/* true if BFD should generate relocation information in the final executable. */
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boolean emitrelocations;
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/* true if BFD should generate a "task linked" object file,
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similar to relocatable but also with globals converted to statics. */
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boolean task_link;
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@ -1,3 +1,12 @@
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2000-05-17 S. Bharadwaj Yadavalli <sby@scrugs.lkg.dec.com>
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Rick Gorton <gorton@scrugs.lkg.dec.com>
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Add support for '-q' == '--emit-relocs' switch.
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* ldmain.c (main): Default to false.
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* lexsup.c (parse_args): Turn on emitrelocations flag if set.
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* NEWS: Describe the emitrelocations switch.
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* ld.texinfo: Describe the emitrelocations switch.
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2000-05-16 Charles Wilson <cwilson@ece.gatech.edu>
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* ld/emultempl/pe.em (_open_dynamic_archive): New function: Search
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6
ld/NEWS
6
ld/NEWS
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@ -2,6 +2,12 @@
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Changes in version 2.10:
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* Added ability to emit full relocation information in linked executables,
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enabled by --emit-relocs. Some post-linkage optimization tools need
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this information in order to be able to correctly identify and perform
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symbol relative addressing in the event of changes in section contents
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(instructions being added or deleted, extending data sections, etc.)
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* Added AT> to the linker script language to allow load-time allocation of
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sections into regions.
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@ -588,6 +588,16 @@ If @var{level} is a numeric values greater than zero @code{ld} optimizes
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the output. This might take significantly longer and therefore probably
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should only be enabled for the final binary.
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@kindex -q
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@kindex --emit-relocs
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@cindex retain relocations in final executable
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@item -q
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@itemx --emit-relocs
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Leave relocation sections and contents in fully linked exececutables.
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Post link analysis and optimization tools may need this information in
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order to perform correct modifications of executables. This results
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in larger executables.
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@cindex partial link
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@cindex relocatable output
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@kindex -r
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@ -214,6 +214,7 @@ main (argc, argv)
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link_info.callbacks = &link_callbacks;
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link_info.relocateable = false;
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link_info.emitrelocations = false;
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link_info.shared = false;
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link_info.symbolic = false;
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link_info.static_link = false;
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@ -1150,7 +1151,7 @@ undefined_symbol (info, name, abfd, section, address, fatal)
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bfd *abfd;
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asection *section;
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bfd_vma address;
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boolean fatal;
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boolean fatal ATTRIBUTE_UNUSED;
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{
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static char *error_name;
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static unsigned int error_count;
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@ -205,6 +205,8 @@ static const struct ld_option ld_options[] =
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'\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH },
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{ {"relocateable", no_argument, NULL, 'r'},
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'r', NULL, N_("Generate relocateable output"), TWO_DASHES },
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{ {"emit-relocs", no_argument, NULL, 'q'},
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'q', NULL, "Generate relocations in final output", TWO_DASHES },
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{ {NULL, no_argument, NULL, '\0'},
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'i', NULL, NULL, ONE_DASH },
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{ {"just-symbols", required_argument, NULL, 'R'},
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@ -717,6 +719,9 @@ parse_args (argc, argv)
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lang_add_output_format (optarg, (char *) NULL, (char *) NULL, 0);
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break;
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case 'i':
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case 'q':
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link_info.emitrelocations = true;
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break;
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case 'r':
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link_info.relocateable = true;
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config.build_constructors = false;
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