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The patch below adds binutils support for the SHT_ARM_EXIDX, as defined by
the ARM EABI.
This commit is contained in:
Nick Clifton
parent
14127cc4f2
commit
40a18ebd3a
@ -1,3 +1,10 @@
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2004-10-01 Paul Brook <paul@codesourcery.com>
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* elf32-arm.h (elf32_arm_fake_sections,
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is_arm_elf_unwind_section_name, elf32_arm_section_from_shdr): New
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functions.
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(elf_backend_fake_sections, elf_backend_section_from_shdr): Define.
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2004-10-01 Alan Modra <amodra@bigpond.net.au>
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* elf-bfd.h (struct eh_cie_fde): Add need_relative and
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@ -4235,9 +4235,6 @@ elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela)
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}
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}
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static bfd_boolean elf32_arm_section_flags (flagword *, const Elf_Internal_Shdr *);
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static void elf32_arm_final_write_processing (bfd *, bfd_boolean);
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/* Set the right machine number for an Arm ELF file. */
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static bfd_boolean
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@ -4255,6 +4252,65 @@ elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED
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bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
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}
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/* Return TRUE if this is an unwinding table entry. */
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static bfd_boolean
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is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name)
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{
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size_t len1, len2;
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len1 = sizeof (ELF_STRING_ARM_unwind) - 1;
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len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1;
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return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0
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|| strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0);
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}
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/* Set the type and flags for an ARM section. We do this by
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the section name, which is a hack, but ought to work. */
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static bfd_boolean
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elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec)
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{
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const char * name;
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name = bfd_get_section_name (abfd, sec);
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if (is_arm_elf_unwind_section_name (abfd, name))
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{
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hdr->sh_type = SHT_ARM_EXIDX;
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hdr->sh_flags |= SHF_LINK_ORDER;
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}
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return TRUE;
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}
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/* Handle an ARM specific section when reading an object file.
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This is called when elf.c finds a section with an unknown type. */
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static bfd_boolean
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elf32_arm_section_from_shdr (bfd *abfd,
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Elf_Internal_Shdr * hdr,
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const char *name)
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{
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/* There ought to be a place to keep ELF backend specific flags, but
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at the moment there isn't one. We just keep track of the
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sections by their name, instead. Fortunately, the ABI gives
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names for all the ARM specific sections, so we will probably get
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away with this. */
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switch (hdr->sh_type)
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{
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case SHT_ARM_EXIDX:
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break;
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default:
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return FALSE;
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}
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if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
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return FALSE;
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return TRUE;
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}
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/* Called for each symbol. Builds a section map based on mapping symbols.
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Does not alter any of the symbols. */
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@ -4426,6 +4482,8 @@ elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec,
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#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
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#define elf_backend_object_p elf32_arm_object_p
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#define elf_backend_section_flags elf32_arm_section_flags
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#define elf_backend_fake_sections elf32_arm_fake_sections
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#define elf_backend_section_from_shdr elf32_arm_section_from_shdr
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#define elf_backend_final_write_processing elf32_arm_final_write_processing
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#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
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@ -1,3 +1,8 @@
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2004-10-01 Paul Brook <paul@codesourcery.com>
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* readelf.c (get_arm_section_type_name): New function.
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(get_section_type_name): Use it.
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2004-09-28 Nick Clifton <nickc@redhat.com>
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* nm.c: Reorder functions to eliminate most of the static function
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@ -2403,6 +2403,19 @@ get_ia64_section_type_name (unsigned int sh_type)
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return NULL;
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}
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static const char *
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get_arm_section_type_name (unsigned int sh_type)
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{
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switch (sh_type)
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{
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case SHT_ARM_EXIDX:
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return "ARM_EXIDX";
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default:
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break;
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}
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return NULL;
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}
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static const char *
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get_section_type_name (unsigned int sh_type)
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{
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@ -2453,6 +2466,9 @@ get_section_type_name (unsigned int sh_type)
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case EM_IA_64:
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result = get_ia64_section_type_name (sh_type);
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break;
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case EM_ARM:
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result = get_arm_section_type_name (sh_type);
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break;
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default:
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result = NULL;
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break;
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@ -1,3 +1,10 @@
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2004-10-01 Paul Brook <paul@codesourcery.com>
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* config/tc-arm.c (arm_elf_section_type): New function.
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(arm_elf_change_section): Set section link for exidx sections.
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* config/tc-arm.h (arm_elf_section_type): Add prototype.
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(md_elf_section_type): Define.
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2004-10-01 Bill Farmer <Bill@the-farmers.freeserve.co.uk>
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* config/tc-pdp11.c (md_apply_fix3): Change to sign of the SOB
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@ -1338,6 +1338,11 @@ arm_elf_change_section (void)
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{
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flagword flags;
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/* Link an unlinked unwind index table section to the .text section. */
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if (elf_section_type (now_seg) == SHT_ARM_EXIDX
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&& elf_linked_to_section (now_seg) == NULL)
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elf_linked_to_section (now_seg) = text_section;
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if (!SEG_NORMAL (now_seg))
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return;
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@ -1349,6 +1354,15 @@ arm_elf_change_section (void)
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mapstate = seg_info (now_seg)->tc_segment_info_data;
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}
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int
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arm_elf_section_type (const char * str, size_t len)
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{
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if (len == 5 && strncmp (str, "exidx", 5) == 0)
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return SHT_ARM_EXIDX;
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return -1;
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}
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#else
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#define mapping_state(a)
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#endif /* OBJ_ELF */
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@ -167,6 +167,7 @@ struct fix;
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# define DWARF2_LINE_MIN_INSN_LENGTH 2
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# define obj_frob_symbol(sym, punt) armelf_frob_symbol ((sym), & (punt))
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# define md_elf_section_change_hook() arm_elf_change_section ()
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# define md_elf_section_type(str, len) arm_elf_section_type (str, len)
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# define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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# define LOCAL_LABEL_PREFIX '.'
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# define TC_SEGMENT_INFO_TYPE enum mstate
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@ -209,3 +210,5 @@ extern void cons_fix_new_arm (fragS *, int, int, expressionS *);
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extern void arm_init_frag (struct frag *);
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extern void arm_handle_align (struct frag *);
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extern bfd_boolean arm_fix_adjustable (struct fix *);
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extern int arm_elf_section_type (const char *, size_t);
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@ -1,3 +1,10 @@
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2004-10-01 Paul Brook <paul@codesourcery.com>
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* arm.h (SHT_ARM_EXIDX): Define.
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(ELF_STRING_ARM_unwind, ELF_STRING_ARM_unwind,
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ELF_STRING_ARM_unwind_once, ELF_STRING_ARM_unwind_info_once):
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Define.
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2004-08-25 Dmitry Diky <diwil@spec.ru>
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* msp430.h: Add new relocs.
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@ -64,6 +64,9 @@
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#define STT_ARM_TFUNC STT_LOPROC /* A Thumb function. */
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#define STT_ARM_16BIT STT_HIPROC /* A Thumb label. */
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/* Additional section types. */
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#define SHT_ARM_EXIDX 0x70000001 /* Section holds ARM unwind info. */
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/* ARM-specific values for sh_flags. */
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#define SHF_ENTRYSECT 0x10000000 /* Section contains an entry point. */
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#define SHF_COMDEF 0x80000000 /* Section may be multiply defined in the input to a link step. */
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@ -157,5 +160,11 @@ END_RELOC_NUMBERS (R_ARM_max)
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/* The name of the note section used to identify arm variants. */
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#define ARM_NOTE_SECTION ".note.gnu.arm.ident"
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/* Special section names. */
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#define ELF_STRING_ARM_unwind ".ARM.exidx"
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#define ELF_STRING_ARM_unwind_info ".ARM.extab"
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#define ELF_STRING_ARM_unwind_once ".gnu.linkonce.armexidx."
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#define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab."
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#endif /* _ELF_ARM_H */
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@ -1,3 +1,7 @@
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2004-10-01 Paul Brook <paul@codesourcery.com>
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* emulparams/armelf.sh: Add unwinding table sections.
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2004-09-30 Filip Navara <navaraf@reactos.com>
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* emultempl/pe.em (gld_${EMULATION_NAME}_set_symbols): Generate
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@ -10,6 +10,11 @@ OTHER_TEXT_SECTIONS='*(.glue_7t) *(.glue_7)'
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OTHER_BSS_SYMBOLS='__bss_start__ = .;'
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OTHER_BSS_END_SYMBOLS='_bss_end__ = . ; __bss_end__ = . ; __end__ = . ;'
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OTHER_SECTIONS='.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }'
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OTHER_READONLY_SECTIONS="
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.ARM.extab ${RELOCATING-0} : { *(.ARM.extab${RELOCATING+* .gnu.linkonce.armextab.*}) }
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__exidx_start = .;
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.ARM.exidx ${RELOCATING-0} : { *(.ARM.exidx${RELOCATING+* .gnu.linkonce.armexidx.*}) }
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__exidx_end = .;"
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DATA_START_SYMBOLS='__data_start = . ;';
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