# This shell script emits a C file. -*- C -*-
-# Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
-# 2004, 2005, 2007, 2008
-# Free Software Foundation, Inc.
+# Copyright (C) 1991-2015 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
#include "ldctor.h"
#include "elf/arm.h"
-static char *thumb_entry_symbol = NULL;
-static bfd *bfd_for_interwork;
+static char * thumb_entry_symbol = NULL;
static int byteswap_code = 0;
static int target1_is_rel = 0${TARGET1_IS_REL};
-static char *target2_type = "${TARGET2_TYPE}";
+static char * target2_type = "${TARGET2_TYPE}";
static int fix_v4bx = 0;
static int use_blx = 0;
static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
+static int fix_cortex_a8 = -1;
static int no_enum_size_warning = 0;
static int no_wchar_size_warning = 0;
static int pic_veneer = 0;
+static int merge_exidx_entries = -1;
+static int fix_arm1176 = 1;
static void
gld${EMULATION_NAME}_before_parse (void)
#ifndef TARGET_ /* I.e., if not generic. */
ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
#endif /* not TARGET_ */
- config.dynamic_link = ${DYNAMIC_LINK-TRUE};
+ input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
-}
-
-static void
-arm_elf_after_open (void)
-{
- {
- LANG_FOR_EACH_INPUT_STATEMENT (is)
- {
- bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info);
- }
- }
-
- /* Call the standard elf routine. */
- gld${EMULATION_NAME}_after_open ();
-}
-
-static void
-arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement)
-{
- if (statement->header.type == lang_input_section_enum)
- {
- asection *i = statement->input_section.section;
-
- if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
- && (i->flags & SEC_EXCLUDE) == 0)
- {
- asection *output_section = i->output_section;
-
- ASSERT (output_section->owner == link_info.output_bfd);
-
- /* Don't attach the interworking stubs to a dynamic object, to
- an empty section, etc. */
- if ((output_section->flags & SEC_HAS_CONTENTS) != 0
- && (i->flags & SEC_NEVER_LOAD) == 0
- && ! (i->owner->flags & DYNAMIC))
- bfd_for_interwork = i->owner;
- }
- }
+ config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
}
static void
arm_elf_before_allocation (void)
{
- if (link_info.input_bfds != NULL)
- {
- /* The interworking bfd must be the last one in the link. */
- bfd_for_interwork = NULL;
-
- lang_for_each_statement (arm_elf_set_bfd_for_interworking);
-
- /* If bfd_for_interwork is NULL, then there are no loadable sections
- with real contents to be linked, so we are not going to have to
- create any interworking stubs, so it is OK not to call
- bfd_elf32_arm_get_bfd_for_interworking. */
- if (bfd_for_interwork != NULL)
- bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info);
- }
-
bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
/* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary
due to architecture version. */
bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info);
+ /* Auto-select Cortex-A8 erratum fix if it wasn't explicitly specified. */
+ bfd_elf32_arm_set_cortex_a8_fix (link_info.output_bfd, &link_info);
+
/* We should be able to set the size of the interworking stub section. We
can't do it until later if we have dynamic sections, though. */
- if (! elf_hash_table (&link_info)->dynamic_sections_created)
+ if (elf_hash_table (&link_info)->dynobj == NULL)
{
/* Here we rummage through the found bfds to collect glue information. */
LANG_FOR_EACH_INPUT_STATEMENT (is)
/* xgettext:c-format */
einfo (_("Errors encountered processing file %s"), is->filename);
}
+
+ /* We have seen it all. Allocate it, and carry on. */
+ bfd_elf32_arm_allocate_interworking_sections (& link_info);
}
/* Call the standard elf routine. */
gld${EMULATION_NAME}_before_allocation ();
-
- /* We have seen it all. Allocate it, and carry on. */
- bfd_elf32_arm_allocate_interworking_sections (& link_info);
-}
-
-static void
-arm_elf_after_allocation (void)
-{
- /* Call the standard elf routine. */
- after_allocation_default ();
-
- {
- LANG_FOR_EACH_INPUT_STATEMENT (is)
- {
- /* Figure out where VFP11 erratum veneers (and the labels returning
- from same) have been placed. */
- bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
- }
- }
}
/* Fake input file for stubs. */
if (l->input_section.section == info->input_section)
{
/* We've found our section. Insert the stub immediately
- before its associated input section. */
- *lp = info->add.head;
- *(info->add.tail) = l;
+ after its associated input section. */
+ *(info->add.tail) = l->header.next;
+ l->header.next = info->add.head;
return TRUE;
}
break;
/* Call-back for elf32_arm_size_stubs. */
/* Create a new stub section, and arrange for it to be linked
- immediately before INPUT_SECTION. */
+ immediately after INPUT_SECTION. */
static asection *
-elf32_arm_add_stub_section (const char *stub_sec_name,
- asection *input_section)
+elf32_arm_add_stub_section (const char * stub_sec_name,
+ asection * input_section,
+ unsigned int alignment_power)
{
asection *stub_sec;
flagword flags;
asection *output_section;
- const char *secname;
lang_output_section_statement_type *os;
struct hook_stub_info info;
if (stub_sec == NULL)
goto err_ret;
- bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);
+ bfd_set_section_alignment (stub_file->the_bfd, stub_sec, alignment_power);
output_section = input_section->output_section;
- secname = bfd_get_section_name (output_section->owner, output_section);
- os = lang_output_section_find (secname);
+ os = lang_output_section_get (output_section);
info.input_section = input_section;
lang_list_init (&info.add);
- lang_add_section (&info.add, stub_sec, os);
+ lang_add_section (&info.add, stub_sec, NULL, os);
if (info.add.head == NULL)
goto err_ret;
{
asection *i = statement->input_section.section;
- if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
+ if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
&& (i->flags & SEC_EXCLUDE) == 0
&& i->output_section != NULL
&& i->output_section->owner == link_info.output_bfd)
}
}
+static int
+compare_output_sec_vma (const void *a, const void *b)
+{
+ asection *asec = *(asection **) a, *bsec = *(asection **) b;
+ asection *aout = asec->output_section, *bout = bsec->output_section;
+ bfd_vma avma, bvma;
+
+ /* If there's no output section for some reason, compare equal. */
+ if (!aout || !bout)
+ return 0;
+
+ avma = aout->vma + asec->output_offset;
+ bvma = bout->vma + bsec->output_offset;
+
+ if (avma > bvma)
+ return 1;
+ else if (avma < bvma)
+ return -1;
+
+ return 0;
+}
+
static void
-gld${EMULATION_NAME}_finish (void)
+gld${EMULATION_NAME}_after_allocation (void)
{
- struct bfd_link_hash_entry * h;
+ int ret;
+
+ if (!link_info.relocatable)
+ {
+ /* Build a sorted list of input text sections, then use that to process
+ the unwind table index. */
+ unsigned int list_size = 10;
+ asection **sec_list = (asection **)
+ xmalloc (list_size * sizeof (asection *));
+ unsigned int sec_count = 0;
+
+ LANG_FOR_EACH_INPUT_STATEMENT (is)
+ {
+ bfd *abfd = is->the_bfd;
+ asection *sec;
+
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ continue;
+
+ for (sec = abfd->sections; sec != NULL; sec = sec->next)
+ {
+ asection *out_sec = sec->output_section;
+
+ if (out_sec
+ && elf_section_data (sec)
+ && elf_section_type (sec) == SHT_PROGBITS
+ && (elf_section_flags (sec) & SHF_EXECINSTR) != 0
+ && (sec->flags & SEC_EXCLUDE) == 0
+ && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
+ && out_sec != bfd_abs_section_ptr)
+ {
+ if (sec_count == list_size)
+ {
+ list_size *= 2;
+ sec_list = (asection **)
+ xrealloc (sec_list, list_size * sizeof (asection *));
+ }
+
+ sec_list[sec_count++] = sec;
+ }
+ }
+ }
+
+ qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
+
+ if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info,
+ merge_exidx_entries))
+ need_laying_out = 1;
+
+ free (sec_list);
+ }
/* bfd_elf32_discard_info just plays with debugging sections,
ie. doesn't affect any code, so we can delay resizing the
sections. It's likely we'll resize everything in the process of
adding stubs. */
- if (bfd_elf_discard_info (link_info.output_bfd, & link_info))
+ ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
+ if (ret < 0)
+ {
+ einfo ("%X%P: .eh_frame/.stab edit: %E\n");
+ return;
+ }
+ else if (ret > 0)
need_laying_out = 1;
/* If generating a relocatable output file, then we don't
have to examine the relocs. */
if (stub_file != NULL && !link_info.relocatable)
{
- int ret = elf32_arm_setup_section_lists (link_info.output_bfd, & link_info);
-
+ ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info);
if (ret != 0)
{
if (ret < 0)
if (need_laying_out != -1)
gld${EMULATION_NAME}_map_segments (need_laying_out);
+}
+
+static void
+gld${EMULATION_NAME}_finish (void)
+{
+ struct bfd_link_hash_entry * h;
+
+ {
+ LANG_FOR_EACH_INPUT_STATEMENT (is)
+ {
+ /* Figure out where VFP11 erratum veneers (and the labels returning
+ from same) have been placed. */
+ bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
+ }
+ }
if (! link_info.relocatable)
{
h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
FALSE, FALSE, TRUE);
eh = (struct elf_link_hash_entry *)h;
- if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC)
+ if (!h || eh->target_internal != ST_BRANCH_TO_THUMB)
return;
}
target2_type, fix_v4bx, use_blx,
vfp11_denorm_fix, no_enum_size_warning,
no_wchar_size_warning,
- pic_veneer);
+ pic_veneer, fix_cortex_a8,
+ fix_arm1176);
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
einfo ("%X%P: can not create BFD %E\n");
return;
}
-
+
stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
ldlang_add_file (stub_file);
+
+ /* Also use the stub file for stubs placed in a single output section. */
+ bfd_elf32_arm_add_glue_sections_to_bfd (stub_file->the_bfd, &link_info);
+ bfd_elf32_arm_get_bfd_for_interworking (stub_file->the_bfd, &link_info);
}
/* Avoid processing the fake stub_file in vercheck, stat_needed and
#define OPTION_NO_ENUM_SIZE_WARNING 309
#define OPTION_PIC_VENEER 310
#define OPTION_FIX_V4BX_INTERWORKING 311
-#define OPTION_STUBGROUP_SIZE 312
+#define OPTION_STUBGROUP_SIZE 312
#define OPTION_NO_WCHAR_SIZE_WARNING 313
+#define OPTION_FIX_CORTEX_A8 314
+#define OPTION_NO_FIX_CORTEX_A8 315
+#define OPTION_NO_MERGE_EXIDX_ENTRIES 316
+#define OPTION_FIX_ARM1176 317
+#define OPTION_NO_FIX_ARM1176 318
+#define OPTION_LONG_PLT 319
'
PARSE_AND_LIST_SHORTOPTS=p
{ "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
{ "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
+ { "fix-cortex-a8", no_argument, NULL, OPTION_FIX_CORTEX_A8 },
+ { "no-fix-cortex-a8", no_argument, NULL, OPTION_NO_FIX_CORTEX_A8 },
+ { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
+ { "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 },
+ { "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 },
+ { "long-plt", no_argument, NULL, OPTION_LONG_PLT },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n"));
fprintf (file, _(" --be8 Output BE8 format image\n"));
- fprintf (file, _(" --target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
- fprintf (file, _(" --target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
+ fprintf (file, _(" --target1-rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
+ fprintf (file, _(" --target1-abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n"));
fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n"));
fprintf (file, _(" --fix-v4bx-interworking Rewrite BX rn branch to ARMv4 interworking veneer\n"));
fprintf (file, _(" --use-blx Enable use of BLX instructions\n"));
fprintf (file, _(" --vfp11-denorm-fix Specify how to fix VFP11 denorm erratum\n"));
- fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible"
+ fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n"
" enum sizes\n"));
- fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible"
+ fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible\n"
" wchar_t sizes\n"));
fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n"));
+ fprintf (file, _(" --long-plt Generate long .plt entries\n"
+ " to handle large .plt/.got displacements\n"));
fprintf (file, _("\
- --stub-group-size=N Maximum size of a group of input sections that can be\n\
- handled by one stub section. A negative value\n\
- locates all stubs before their branches (with a\n\
- group size of -N), while a positive value allows\n\
- two groups of input sections, one before, and one\n\
- after each stub section. Values of +/-1 indicate\n\
- the linker should choose suitable defaults.\n"
- ));
+ --stub-group-size=N Maximum size of a group of input sections that\n\
+ can be handled by one stub section. A negative\n\
+ value locates all stubs after their branches\n\
+ (with a group size of -N), while a positive\n\
+ value allows two groups of input sections, one\n\
+ before, and one after each stub section.\n\
+ Values of +/-1 indicate the linker should\n\
+ choose suitable defaults.\n"));
+ fprintf (file, _(" --[no-]fix-cortex-a8 Disable/enable Cortex-A8 Thumb-2 branch erratum fix\n"));
+ fprintf (file, _(" --no-merge-exidx-entries Disable merging exidx entries\n"));
+ fprintf (file, _(" --[no-]fix-arm1176 Disable/enable ARM1176 BLX immediate erratum fix\n"));
'
PARSE_AND_LIST_ARGS_CASES='
einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
}
break;
+
+ case OPTION_FIX_CORTEX_A8:
+ fix_cortex_a8 = 1;
+ break;
+
+ case OPTION_NO_FIX_CORTEX_A8:
+ fix_cortex_a8 = 0;
+ break;
+
+ case OPTION_NO_MERGE_EXIDX_ENTRIES:
+ merge_exidx_entries = 0;
+ break;
+
+ case OPTION_FIX_ARM1176:
+ fix_arm1176 = 1;
+ break;
+
+ case OPTION_NO_FIX_ARM1176:
+ fix_arm1176 = 0;
+ break;
+
+ case OPTION_LONG_PLT:
+ bfd_elf32_arm_use_long_plt ();
+ break;
'
-# We have our own after_open and before_allocation functions, but they call
+# We have our own before_allocation etc. functions, but they call
# the standard routines, so give them a different name.
-LDEMUL_AFTER_OPEN=arm_elf_after_open
LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
-LDEMUL_AFTER_ALLOCATION=arm_elf_after_allocation
+LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
# Replace the elf before_parse function with our own.
projects / deliverable / binutils-gdb.git / blobdiff