Add support for target specific processing of ELF segments
This commit is contained in:
Nick Clifton
parent
ba3d4249ed
commit
20cfcaae7b
4 changed files with 82 additions and 17 deletions
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@ -1,3 +1,22 @@
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1999-11-26 Fred Fish <fnf@cygnus.com>
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* elf.c (elfcore_read_notes): Add prototype for static function.
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(_bfd_elf_make_section_from_phdr): Renamed from bfd_section_from_phdr.
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(bfd_section_from_phdr): Replacement function that calls
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_bfd_elf_make_section_from_phdr for generic segment types and
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backend fucntion pointed to by elf_backend_section_from_phdr for
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backend specific segment types.
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(_bfd_elfcore_section_from_phdr): Remove call to elfcore_read_notes,
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now called by _bfd_elf_make_section_from_phdr. Note that this func
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is now just a stub between the caller and bfd_section_from_phdr.
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* elf-bfd.h (struct elf_backend_data): Add new function pointer
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elf_backend_section_from_phdr.
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(elf_backend_section_from_phdr): Add prototype.
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* elfxx-target.h (elf_backend_section_from_phdr): Define default.
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(elfNN_bed): Add elf_backend_section_from_phdr.
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1999-11-25 Nick Clifton <nickc@cygnus.com>
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* coff-arm.c (bfd_arm_get_bfd_for_interworking): Add
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@ -388,6 +388,12 @@ struct elf_backend_data
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Elf32_Internal_Shdr *,
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char *));
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/* A function to handle unusual program segment types when creating BFD
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sections from ELF program segments. */
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boolean (*elf_backend_section_from_phdr) PARAMS ((bfd *,
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Elf32_Internal_Phdr *,
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int));
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/* A function to set up the ELF section header for a BFD section in
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preparation for writing it out. This is where the flags and type
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fields are set for unusual sections. */
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@ -945,6 +951,8 @@ extern boolean bfd_elf_mkcorefile PARAMS ((bfd *));
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extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
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extern boolean _bfd_elf_make_section_from_shdr
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PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
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extern boolean _bfd_elf_make_section_from_phdr
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PARAMS ((bfd *abfd, Elf_Internal_Phdr *hdr, int index, const char *typename));
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extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
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68
bfd/elf.c
68
bfd/elf.c
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@ -53,6 +53,7 @@ static boolean assign_section_numbers PARAMS ((bfd *));
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static INLINE int sym_is_global PARAMS ((bfd *, asymbol *));
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static boolean elf_map_symbols PARAMS ((bfd *));
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static bfd_size_type get_program_header_size PARAMS ((bfd *));
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static boolean elfcore_read_notes PARAMS ((bfd *, bfd_vma, bfd_vma));
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/* Swap version information in and out. The version information is
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currently size independent. If that ever changes, this code will
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@ -1387,31 +1388,20 @@ _bfd_elf_new_section_hook (abfd, sec)
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*/
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boolean
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bfd_section_from_phdr (abfd, hdr, index)
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_bfd_elf_make_section_from_phdr (abfd, hdr, index, typename)
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bfd *abfd;
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Elf_Internal_Phdr *hdr;
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int index;
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const char *typename;
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{
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asection *newsect;
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char *name;
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char *typename;
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char namebuf[64];
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int split;
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split = ((hdr->p_memsz > 0)
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&& (hdr->p_filesz > 0)
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&& (hdr->p_memsz > hdr->p_filesz));
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switch (hdr->p_type)
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{
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case PT_NULL: typename = "null"; break;
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case PT_LOAD: typename = "load"; break;
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case PT_DYNAMIC: typename = "dynamic"; break;
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case PT_INTERP: typename = "interp"; break;
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case PT_NOTE: typename = "note"; break;
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case PT_SHLIB: typename = "shlib"; break;
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case PT_PHDR: typename = "phdr"; break;
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default: typename = "segment"; break;
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}
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sprintf (namebuf, "%s%d%s", typename, index, split ? "a" : "");
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name = bfd_alloc (abfd, strlen (namebuf) + 1);
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if (!name)
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@ -1467,6 +1457,52 @@ bfd_section_from_phdr (abfd, hdr, index)
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return true;
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}
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boolean
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bfd_section_from_phdr (abfd, hdr, index)
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bfd *abfd;
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Elf_Internal_Phdr *hdr;
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int index;
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{
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struct elf_backend_data *bed;
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switch (hdr->p_type)
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{
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case PT_NULL:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "null");
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case PT_LOAD:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "load");
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case PT_DYNAMIC:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "dynamic");
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case PT_INTERP:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "interp");
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case PT_NOTE:
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if (! _bfd_elf_make_section_from_phdr (abfd, hdr, index, "note"))
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return false;
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if (! elfcore_read_notes (abfd, hdr->p_offset, hdr->p_filesz))
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return false;
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return true;
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case PT_SHLIB:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "shlib");
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case PT_PHDR:
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "phdr");
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default:
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/* Check for any processor-specific program segment types.
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If no handler for them, default to making "segment" sections. */
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bed = get_elf_backend_data (abfd);
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if (bed->elf_backend_section_from_phdr)
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return (*bed->elf_backend_section_from_phdr) (abfd, hdr, index);
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else
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return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "segment");
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}
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}
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/* Initialize REL_HDR, the section-header for new section, containing
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relocations against ASECT. If USE_RELA_P is true, we use RELA
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relocations; otherwise, we use REL relocations. */
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@ -5308,6 +5344,8 @@ elfcore_read_notes (abfd, offset, size)
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}
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/* FIXME: This function is now unnecessary. Callers can just call
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bfd_section_from_phdr directly. */
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boolean
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_bfd_elfcore_section_from_phdr (abfd, phdr, sec_num)
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@ -5318,10 +5356,6 @@ _bfd_elfcore_section_from_phdr (abfd, phdr, sec_num)
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if (! bfd_section_from_phdr (abfd, phdr, sec_num))
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return false;
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if (phdr->p_type == PT_NOTE
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&& ! elfcore_read_notes (abfd, phdr->p_offset, phdr->p_filesz))
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return false;
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return true;
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}
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@ -237,6 +237,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef elf_backend_section_from_shdr
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#define elf_backend_section_from_shdr 0
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#endif
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#ifndef elf_backend_section_from_phdr
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#define elf_backend_section_from_phdr 0
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#endif
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#ifndef elf_backend_fake_sections
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#define elf_backend_fake_sections 0
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#endif
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@ -358,6 +361,7 @@ static CONST struct elf_backend_data elfNN_bed =
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elf_backend_get_symbol_type,
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elf_backend_section_processing,
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elf_backend_section_from_shdr,
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elf_backend_section_from_phdr,
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elf_backend_fake_sections,
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elf_backend_section_from_bfd_section,
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elf_backend_add_symbol_hook,
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