/* ELF executable support for BFD.
- Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support, from information published
in "UNIX System V Release 4, Programmers Guide: ANSI C and
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Problems and other issues to resolve.
it's cast in stone.
*/
-#include <string.h> /* For strrchr and friends */
#include "bfd.h"
#include "sysdep.h"
+#include "libiberty.h"
#include "bfdlink.h"
#include "libbfd.h"
-#include "libelf.h"
+#include "elf-bfd.h"
/* Renaming structures, typedefs, macros and functions to be size-specific. */
#define Elf_External_Ehdr NAME(Elf,External_Ehdr)
#define elf_swap_reloca_out NAME(bfd_elf,swap_reloca_out)
#define elf_swap_symbol_in NAME(bfd_elf,swap_symbol_in)
#define elf_swap_symbol_out NAME(bfd_elf,swap_symbol_out)
+#define elf_swap_phdr_in NAME(bfd_elf,swap_phdr_in)
+#define elf_swap_phdr_out NAME(bfd_elf,swap_phdr_out)
#define elf_swap_dyn_in NAME(bfd_elf,swap_dyn_in)
#define elf_swap_dyn_out NAME(bfd_elf,swap_dyn_out)
#define elf_get_reloc_upper_bound NAME(bfd_elf,get_reloc_upper_bound)
#define elf_canonicalize_reloc NAME(bfd_elf,canonicalize_reloc)
+#define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table)
#define elf_get_symtab NAME(bfd_elf,get_symtab)
#define elf_canonicalize_dynamic_symtab \
NAME(bfd_elf,canonicalize_dynamic_symtab)
#define elf_set_section_contents NAME(bfd_elf,set_section_contents)
#define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
#define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
-#define elf_new_section_hook NAME(bfd_elf,new_section_hook)
-#define write_relocs NAME(bfd_elf,_write_relocs)
#define elf_find_section NAME(bfd_elf,find_section)
#define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols)
#define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry)
+#define elf_write_shdrs_and_ehdr NAME(bfd_elf,write_shdrs_and_ehdr)
+#define elf_write_out_phdrs NAME(bfd_elf,write_out_phdrs)
+#define elf_write_relocs NAME(bfd_elf,write_relocs)
+#define elf_slurp_reloc_table NAME(bfd_elf,slurp_reloc_table)
#define elf_link_create_dynamic_sections \
NAME(bfd_elf,link_create_dynamic_sections)
-#define elf_link_record_dynamic_symbol \
- NAME(bfd_elf,link_record_dynamic_symbol)
+#define elf_bfd_discard_info NAME(bfd_elf,discard_info)
+#define elf_reloc_symbol_deleted_p NAME(_bfd_elf,reloc_symbol_deleted_p)
+#define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
#define elf_bfd_final_link NAME(bfd_elf,bfd_final_link)
+#define elf_create_pointer_linker_section NAME(bfd_elf,create_pointer_linker_section)
+#define elf_finish_pointer_linker_section NAME(bfd_elf,finish_pointer_linker_section)
+#define elf_gc_sections NAME(_bfd_elf,gc_sections)
+#define elf_gc_common_finalize_got_offsets \
+ NAME(_bfd_elf,gc_common_finalize_got_offsets)
+#define elf_gc_common_final_link NAME(_bfd_elf,gc_common_final_link)
+#define elf_gc_record_vtinherit NAME(_bfd_elf,gc_record_vtinherit)
+#define elf_gc_record_vtentry NAME(_bfd_elf,gc_record_vtentry)
+#define elf_link_record_local_dynamic_symbol \
+ NAME(_bfd_elf,link_record_local_dynamic_symbol)
#if ARCH_SIZE == 64
#define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
#define LOG_FILE_ALIGN 2
#endif
-/* Forward declarations of static functions */
+/* Static functions */
-static struct bfd_strtab_hash *elf_stringtab_init PARAMS ((void));
-static asection *section_from_elf_index PARAMS ((bfd *, unsigned int));
+static void elf_swap_ehdr_in
+ PARAMS ((bfd *, const Elf_External_Ehdr *, Elf_Internal_Ehdr *));
+static void elf_swap_ehdr_out
+ PARAMS ((bfd *, const Elf_Internal_Ehdr *, Elf_External_Ehdr *));
+static void elf_swap_shdr_in
+ PARAMS ((bfd *, const Elf_External_Shdr *, Elf_Internal_Shdr *));
+static void elf_swap_shdr_out
+ PARAMS ((bfd *, const Elf_Internal_Shdr *, Elf_External_Shdr *));
-static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *));
+#define elf_stringtab_init _bfd_elf_stringtab_init
-static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean));
+#define section_from_elf_index bfd_section_from_elf_index
-static boolean elf_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **));
+static bfd_boolean elf_slurp_reloc_table_from_section
+ PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, bfd_size_type,
+ arelent *, asymbol **, bfd_boolean));
-static int elf_symbol_from_bfd_symbol PARAMS ((bfd *,
- struct symbol_cache_entry **));
-
-static boolean elf_compute_section_file_positions
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean prep_headers PARAMS ((bfd *));
-static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
-static boolean assign_section_numbers PARAMS ((bfd *));
-static file_ptr align_file_position PARAMS ((file_ptr));
-static file_ptr assign_file_position_for_section
- PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean));
-static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean));
-static void assign_file_positions_for_relocs PARAMS ((bfd *));
-static bfd_size_type get_program_header_size PARAMS ((bfd *));
-static file_ptr map_program_segments
- PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, bfd_size_type));
-
-static boolean elf_map_symbols PARAMS ((bfd *));
-static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
-
-static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
+static bfd_boolean elf_file_p PARAMS ((Elf_External_Ehdr *));
#ifdef DEBUG
static void elf_debug_section PARAMS ((int, Elf_Internal_Shdr *));
static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
+static char *elf_symbol_flags PARAMS ((flagword));
#endif
-
-#define elf_string_from_elf_strtab(abfd,strindex) \
- elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
\f
/* Structure swapping routines */
/* Should perhaps use put_offset, put_word, etc. For now, the two versions
can be handled by explicitly specifying 32 bits or "the long type". */
#if ARCH_SIZE == 64
-#define put_word bfd_h_put_64
-#define get_word bfd_h_get_64
+#define H_PUT_WORD H_PUT_64
+#define H_PUT_SIGNED_WORD H_PUT_S64
+#define H_GET_WORD H_GET_64
+#define H_GET_SIGNED_WORD H_GET_S64
#endif
#if ARCH_SIZE == 32
-#define put_word bfd_h_put_32
-#define get_word bfd_h_get_32
+#define H_PUT_WORD H_PUT_32
+#define H_PUT_SIGNED_WORD H_PUT_S32
+#define H_GET_WORD H_GET_32
+#define H_GET_SIGNED_WORD H_GET_S32
#endif
/* Translate an ELF symbol in external format into an ELF symbol in internal
- format. */
+ format. */
void
-elf_swap_symbol_in (abfd, src, dst)
+elf_swap_symbol_in (abfd, psrc, pshn, dst)
bfd *abfd;
- Elf_External_Sym *src;
+ const PTR psrc;
+ const PTR pshn;
Elf_Internal_Sym *dst;
{
- dst->st_name = bfd_h_get_32 (abfd, (bfd_byte *) src->st_name);
- dst->st_value = get_word (abfd, (bfd_byte *) src->st_value);
- dst->st_size = get_word (abfd, (bfd_byte *) src->st_size);
- dst->st_info = bfd_h_get_8 (abfd, (bfd_byte *) src->st_info);
- dst->st_other = bfd_h_get_8 (abfd, (bfd_byte *) src->st_other);
- dst->st_shndx = bfd_h_get_16 (abfd, (bfd_byte *) src->st_shndx);
+ const Elf_External_Sym *src = (const Elf_External_Sym *) psrc;
+ const Elf_External_Sym_Shndx *shndx = (const Elf_External_Sym_Shndx *) pshn;
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
+ dst->st_name = H_GET_32 (abfd, src->st_name);
+ if (signed_vma)
+ dst->st_value = H_GET_SIGNED_WORD (abfd, src->st_value);
+ else
+ dst->st_value = H_GET_WORD (abfd, src->st_value);
+ dst->st_size = H_GET_WORD (abfd, src->st_size);
+ dst->st_info = H_GET_8 (abfd, src->st_info);
+ dst->st_other = H_GET_8 (abfd, src->st_other);
+ dst->st_shndx = H_GET_16 (abfd, src->st_shndx);
+ if (dst->st_shndx == SHN_XINDEX)
+ {
+ if (shndx == NULL)
+ abort ();
+ dst->st_shndx = H_GET_32 (abfd, shndx->est_shndx);
+ }
}
/* Translate an ELF symbol in internal format into an ELF symbol in external
- format. */
+ format. */
void
-elf_swap_symbol_out (abfd, src, dst)
+elf_swap_symbol_out (abfd, src, cdst, shndx)
bfd *abfd;
- Elf_Internal_Sym *src;
- Elf_External_Sym *dst;
-{
- bfd_h_put_32 (abfd, src->st_name, dst->st_name);
- put_word (abfd, src->st_value, dst->st_value);
- put_word (abfd, src->st_size, dst->st_size);
- bfd_h_put_8 (abfd, src->st_info, dst->st_info);
- bfd_h_put_8 (abfd, src->st_other, dst->st_other);
- bfd_h_put_16 (abfd, src->st_shndx, dst->st_shndx);
+ const Elf_Internal_Sym *src;
+ PTR cdst;
+ PTR shndx;
+{
+ unsigned int tmp;
+ Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
+ H_PUT_32 (abfd, src->st_name, dst->st_name);
+ H_PUT_WORD (abfd, src->st_value, dst->st_value);
+ H_PUT_WORD (abfd, src->st_size, dst->st_size);
+ H_PUT_8 (abfd, src->st_info, dst->st_info);
+ H_PUT_8 (abfd, src->st_other, dst->st_other);
+ tmp = src->st_shndx;
+ if (tmp > SHN_HIRESERVE)
+ {
+ if (shndx == NULL)
+ abort ();
+ H_PUT_32 (abfd, tmp, shndx);
+ tmp = SHN_XINDEX;
+ }
+ H_PUT_16 (abfd, tmp, dst->st_shndx);
}
-
/* Translate an ELF file header in external format into an ELF file header in
- internal format. */
+ internal format. */
static void
elf_swap_ehdr_in (abfd, src, dst)
bfd *abfd;
- Elf_External_Ehdr *src;
+ const Elf_External_Ehdr *src;
Elf_Internal_Ehdr *dst;
{
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
- dst->e_type = bfd_h_get_16 (abfd, (bfd_byte *) src->e_type);
- dst->e_machine = bfd_h_get_16 (abfd, (bfd_byte *) src->e_machine);
- dst->e_version = bfd_h_get_32 (abfd, (bfd_byte *) src->e_version);
- dst->e_entry = get_word (abfd, (bfd_byte *) src->e_entry);
- dst->e_phoff = get_word (abfd, (bfd_byte *) src->e_phoff);
- dst->e_shoff = get_word (abfd, (bfd_byte *) src->e_shoff);
- dst->e_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->e_flags);
- dst->e_ehsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_ehsize);
- dst->e_phentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phentsize);
- dst->e_phnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_phnum);
- dst->e_shentsize = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shentsize);
- dst->e_shnum = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shnum);
- dst->e_shstrndx = bfd_h_get_16 (abfd, (bfd_byte *) src->e_shstrndx);
+ dst->e_type = H_GET_16 (abfd, src->e_type);
+ dst->e_machine = H_GET_16 (abfd, src->e_machine);
+ dst->e_version = H_GET_32 (abfd, src->e_version);
+ if (signed_vma)
+ dst->e_entry = H_GET_SIGNED_WORD (abfd, src->e_entry);
+ else
+ dst->e_entry = H_GET_WORD (abfd, src->e_entry);
+ dst->e_phoff = H_GET_WORD (abfd, src->e_phoff);
+ dst->e_shoff = H_GET_WORD (abfd, src->e_shoff);
+ dst->e_flags = H_GET_32 (abfd, src->e_flags);
+ dst->e_ehsize = H_GET_16 (abfd, src->e_ehsize);
+ dst->e_phentsize = H_GET_16 (abfd, src->e_phentsize);
+ dst->e_phnum = H_GET_16 (abfd, src->e_phnum);
+ dst->e_shentsize = H_GET_16 (abfd, src->e_shentsize);
+ dst->e_shnum = H_GET_16 (abfd, src->e_shnum);
+ dst->e_shstrndx = H_GET_16 (abfd, src->e_shstrndx);
}
/* Translate an ELF file header in internal format into an ELF file header in
- external format. */
+ external format. */
static void
elf_swap_ehdr_out (abfd, src, dst)
bfd *abfd;
- Elf_Internal_Ehdr *src;
+ const Elf_Internal_Ehdr *src;
Elf_External_Ehdr *dst;
{
+ unsigned int tmp;
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
memcpy (dst->e_ident, src->e_ident, EI_NIDENT);
- /* note that all elements of dst are *arrays of unsigned char* already... */
- bfd_h_put_16 (abfd, src->e_type, dst->e_type);
- bfd_h_put_16 (abfd, src->e_machine, dst->e_machine);
- bfd_h_put_32 (abfd, src->e_version, dst->e_version);
- put_word (abfd, src->e_entry, dst->e_entry);
- put_word (abfd, src->e_phoff, dst->e_phoff);
- put_word (abfd, src->e_shoff, dst->e_shoff);
- bfd_h_put_32 (abfd, src->e_flags, dst->e_flags);
- bfd_h_put_16 (abfd, src->e_ehsize, dst->e_ehsize);
- bfd_h_put_16 (abfd, src->e_phentsize, dst->e_phentsize);
- bfd_h_put_16 (abfd, src->e_phnum, dst->e_phnum);
- bfd_h_put_16 (abfd, src->e_shentsize, dst->e_shentsize);
- bfd_h_put_16 (abfd, src->e_shnum, dst->e_shnum);
- bfd_h_put_16 (abfd, src->e_shstrndx, dst->e_shstrndx);
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ H_PUT_16 (abfd, src->e_type, dst->e_type);
+ H_PUT_16 (abfd, src->e_machine, dst->e_machine);
+ H_PUT_32 (abfd, src->e_version, dst->e_version);
+ if (signed_vma)
+ H_PUT_SIGNED_WORD (abfd, src->e_entry, dst->e_entry);
+ else
+ H_PUT_WORD (abfd, src->e_entry, dst->e_entry);
+ H_PUT_WORD (abfd, src->e_phoff, dst->e_phoff);
+ H_PUT_WORD (abfd, src->e_shoff, dst->e_shoff);
+ H_PUT_32 (abfd, src->e_flags, dst->e_flags);
+ H_PUT_16 (abfd, src->e_ehsize, dst->e_ehsize);
+ H_PUT_16 (abfd, src->e_phentsize, dst->e_phentsize);
+ H_PUT_16 (abfd, src->e_phnum, dst->e_phnum);
+ H_PUT_16 (abfd, src->e_shentsize, dst->e_shentsize);
+ tmp = src->e_shnum;
+ if (tmp >= SHN_LORESERVE)
+ tmp = SHN_UNDEF;
+ H_PUT_16 (abfd, tmp, dst->e_shnum);
+ tmp = src->e_shstrndx;
+ if (tmp >= SHN_LORESERVE)
+ tmp = SHN_XINDEX;
+ H_PUT_16 (abfd, tmp, dst->e_shstrndx);
}
-
/* Translate an ELF section header table entry in external format into an
- ELF section header table entry in internal format. */
+ ELF section header table entry in internal format. */
static void
elf_swap_shdr_in (abfd, src, dst)
bfd *abfd;
- Elf_External_Shdr *src;
+ const Elf_External_Shdr *src;
Elf_Internal_Shdr *dst;
{
- dst->sh_name = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_name);
- dst->sh_type = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_type);
- dst->sh_flags = get_word (abfd, (bfd_byte *) src->sh_flags);
- dst->sh_addr = get_word (abfd, (bfd_byte *) src->sh_addr);
- dst->sh_offset = get_word (abfd, (bfd_byte *) src->sh_offset);
- dst->sh_size = get_word (abfd, (bfd_byte *) src->sh_size);
- dst->sh_link = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_link);
- dst->sh_info = bfd_h_get_32 (abfd, (bfd_byte *) src->sh_info);
- dst->sh_addralign = get_word (abfd, (bfd_byte *) src->sh_addralign);
- dst->sh_entsize = get_word (abfd, (bfd_byte *) src->sh_entsize);
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
+ dst->sh_name = H_GET_32 (abfd, src->sh_name);
+ dst->sh_type = H_GET_32 (abfd, src->sh_type);
+ dst->sh_flags = H_GET_WORD (abfd, src->sh_flags);
+ if (signed_vma)
+ dst->sh_addr = H_GET_SIGNED_WORD (abfd, src->sh_addr);
+ else
+ dst->sh_addr = H_GET_WORD (abfd, src->sh_addr);
+ dst->sh_offset = H_GET_WORD (abfd, src->sh_offset);
+ dst->sh_size = H_GET_WORD (abfd, src->sh_size);
+ dst->sh_link = H_GET_32 (abfd, src->sh_link);
+ dst->sh_info = H_GET_32 (abfd, src->sh_info);
+ dst->sh_addralign = H_GET_WORD (abfd, src->sh_addralign);
+ dst->sh_entsize = H_GET_WORD (abfd, src->sh_entsize);
dst->bfd_section = NULL;
dst->contents = NULL;
}
/* Translate an ELF section header table entry in internal format into an
- ELF section header table entry in external format. */
+ ELF section header table entry in external format. */
static void
elf_swap_shdr_out (abfd, src, dst)
bfd *abfd;
- Elf_Internal_Shdr *src;
+ const Elf_Internal_Shdr *src;
Elf_External_Shdr *dst;
{
- /* note that all elements of dst are *arrays of unsigned char* already... */
- bfd_h_put_32 (abfd, src->sh_name, dst->sh_name);
- bfd_h_put_32 (abfd, src->sh_type, dst->sh_type);
- put_word (abfd, src->sh_flags, dst->sh_flags);
- put_word (abfd, src->sh_addr, dst->sh_addr);
- put_word (abfd, src->sh_offset, dst->sh_offset);
- put_word (abfd, src->sh_size, dst->sh_size);
- bfd_h_put_32 (abfd, src->sh_link, dst->sh_link);
- bfd_h_put_32 (abfd, src->sh_info, dst->sh_info);
- put_word (abfd, src->sh_addralign, dst->sh_addralign);
- put_word (abfd, src->sh_entsize, dst->sh_entsize);
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ H_PUT_32 (abfd, src->sh_name, dst->sh_name);
+ H_PUT_32 (abfd, src->sh_type, dst->sh_type);
+ H_PUT_WORD (abfd, src->sh_flags, dst->sh_flags);
+ H_PUT_WORD (abfd, src->sh_addr, dst->sh_addr);
+ H_PUT_WORD (abfd, src->sh_offset, dst->sh_offset);
+ H_PUT_WORD (abfd, src->sh_size, dst->sh_size);
+ H_PUT_32 (abfd, src->sh_link, dst->sh_link);
+ H_PUT_32 (abfd, src->sh_info, dst->sh_info);
+ H_PUT_WORD (abfd, src->sh_addralign, dst->sh_addralign);
+ H_PUT_WORD (abfd, src->sh_entsize, dst->sh_entsize);
}
-
/* Translate an ELF program header table entry in external format into an
- ELF program header table entry in internal format. */
+ ELF program header table entry in internal format. */
-static void
+void
elf_swap_phdr_in (abfd, src, dst)
bfd *abfd;
- Elf_External_Phdr *src;
+ const Elf_External_Phdr *src;
Elf_Internal_Phdr *dst;
{
- dst->p_type = bfd_h_get_32 (abfd, (bfd_byte *) src->p_type);
- dst->p_flags = bfd_h_get_32 (abfd, (bfd_byte *) src->p_flags);
- dst->p_offset = get_word (abfd, (bfd_byte *) src->p_offset);
- dst->p_vaddr = get_word (abfd, (bfd_byte *) src->p_vaddr);
- dst->p_paddr = get_word (abfd, (bfd_byte *) src->p_paddr);
- dst->p_filesz = get_word (abfd, (bfd_byte *) src->p_filesz);
- dst->p_memsz = get_word (abfd, (bfd_byte *) src->p_memsz);
- dst->p_align = get_word (abfd, (bfd_byte *) src->p_align);
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
+
+ dst->p_type = H_GET_32 (abfd, src->p_type);
+ dst->p_flags = H_GET_32 (abfd, src->p_flags);
+ dst->p_offset = H_GET_WORD (abfd, src->p_offset);
+ if (signed_vma)
+ {
+ dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
+ dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
+ }
+ else
+ {
+ dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
+ dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
+ }
+ dst->p_filesz = H_GET_WORD (abfd, src->p_filesz);
+ dst->p_memsz = H_GET_WORD (abfd, src->p_memsz);
+ dst->p_align = H_GET_WORD (abfd, src->p_align);
}
-static void
+void
elf_swap_phdr_out (abfd, src, dst)
bfd *abfd;
- Elf_Internal_Phdr *src;
+ const Elf_Internal_Phdr *src;
Elf_External_Phdr *dst;
{
- /* note that all elements of dst are *arrays of unsigned char* already... */
- bfd_h_put_32 (abfd, src->p_type, dst->p_type);
- put_word (abfd, src->p_offset, dst->p_offset);
- put_word (abfd, src->p_vaddr, dst->p_vaddr);
- put_word (abfd, src->p_paddr, dst->p_paddr);
- put_word (abfd, src->p_filesz, dst->p_filesz);
- put_word (abfd, src->p_memsz, dst->p_memsz);
- bfd_h_put_32 (abfd, src->p_flags, dst->p_flags);
- put_word (abfd, src->p_align, dst->p_align);
+ /* note that all elements of dst are *arrays of unsigned char* already... */
+ H_PUT_32 (abfd, src->p_type, dst->p_type);
+ H_PUT_WORD (abfd, src->p_offset, dst->p_offset);
+ H_PUT_WORD (abfd, src->p_vaddr, dst->p_vaddr);
+ H_PUT_WORD (abfd, src->p_paddr, dst->p_paddr);
+ H_PUT_WORD (abfd, src->p_filesz, dst->p_filesz);
+ H_PUT_WORD (abfd, src->p_memsz, dst->p_memsz);
+ H_PUT_32 (abfd, src->p_flags, dst->p_flags);
+ H_PUT_WORD (abfd, src->p_align, dst->p_align);
}
-/* Translate an ELF reloc from external format to internal format. */
-INLINE void
-elf_swap_reloc_in (abfd, src, dst)
+/* Translate an ELF reloc from external format to internal format. */
+void
+elf_swap_reloc_in (abfd, s, dst)
bfd *abfd;
- Elf_External_Rel *src;
- Elf_Internal_Rel *dst;
+ const bfd_byte *s;
+ Elf_Internal_Rela *dst;
{
- dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset);
- dst->r_info = get_word (abfd, (bfd_byte *) src->r_info);
+ const Elf_External_Rel *src = (const Elf_External_Rel *) s;
+ dst->r_offset = H_GET_WORD (abfd, src->r_offset);
+ dst->r_info = H_GET_WORD (abfd, src->r_info);
+ dst->r_addend = 0;
}
-INLINE void
-elf_swap_reloca_in (abfd, src, dst)
+void
+elf_swap_reloca_in (abfd, s, dst)
bfd *abfd;
- Elf_External_Rela *src;
+ const bfd_byte *s;
Elf_Internal_Rela *dst;
{
- dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset);
- dst->r_info = get_word (abfd, (bfd_byte *) src->r_info);
- dst->r_addend = get_word (abfd, (bfd_byte *) src->r_addend);
+ const Elf_External_Rela *src = (const Elf_External_Rela *) s;
+ dst->r_offset = H_GET_WORD (abfd, src->r_offset);
+ dst->r_info = H_GET_WORD (abfd, src->r_info);
+ dst->r_addend = H_GET_SIGNED_WORD (abfd, src->r_addend);
}
-/* Translate an ELF reloc from internal format to external format. */
-INLINE void
-elf_swap_reloc_out (abfd, src, dst)
+/* Translate an ELF reloc from internal format to external format. */
+void
+elf_swap_reloc_out (abfd, src, d)
bfd *abfd;
- Elf_Internal_Rel *src;
- Elf_External_Rel *dst;
+ const Elf_Internal_Rela *src;
+ bfd_byte *d;
{
- put_word (abfd, src->r_offset, dst->r_offset);
- put_word (abfd, src->r_info, dst->r_info);
+ Elf_External_Rel *dst = (Elf_External_Rel *) d;
+ H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
+ H_PUT_WORD (abfd, src->r_info, dst->r_info);
}
-INLINE void
-elf_swap_reloca_out (abfd, src, dst)
+void
+elf_swap_reloca_out (abfd, src, d)
bfd *abfd;
- Elf_Internal_Rela *src;
- Elf_External_Rela *dst;
+ const Elf_Internal_Rela *src;
+ bfd_byte *d;
{
- put_word (abfd, src->r_offset, dst->r_offset);
- put_word (abfd, src->r_info, dst->r_info);
- put_word (abfd, src->r_addend, dst->r_addend);
+ Elf_External_Rela *dst = (Elf_External_Rela *) d;
+ H_PUT_WORD (abfd, src->r_offset, dst->r_offset);
+ H_PUT_WORD (abfd, src->r_info, dst->r_info);
+ H_PUT_SIGNED_WORD (abfd, src->r_addend, dst->r_addend);
}
INLINE void
-elf_swap_dyn_in (abfd, src, dst)
+elf_swap_dyn_in (abfd, p, dst)
bfd *abfd;
- const Elf_External_Dyn *src;
+ const PTR p;
Elf_Internal_Dyn *dst;
{
- dst->d_tag = get_word (abfd, src->d_tag);
- dst->d_un.d_val = get_word (abfd, src->d_un.d_val);
+ const Elf_External_Dyn *src = (const Elf_External_Dyn *) p;
+
+ dst->d_tag = H_GET_WORD (abfd, src->d_tag);
+ dst->d_un.d_val = H_GET_WORD (abfd, src->d_un.d_val);
}
INLINE void
-elf_swap_dyn_out (abfd, src, dst)
+elf_swap_dyn_out (abfd, src, p)
bfd *abfd;
const Elf_Internal_Dyn *src;
- Elf_External_Dyn *dst;
-{
- put_word (abfd, src->d_tag, dst->d_tag);
- put_word (abfd, src->d_un.d_val, dst->d_un.d_val);
-}
-\f
-/* Allocate an ELF string table--force the first byte to be zero. */
-
-static struct bfd_strtab_hash *
-elf_stringtab_init ()
+ PTR p;
{
- struct bfd_strtab_hash *ret;
-
- ret = _bfd_stringtab_init ();
- if (ret != NULL)
- {
- bfd_size_type loc;
+ Elf_External_Dyn *dst = (Elf_External_Dyn *) p;
- loc = _bfd_stringtab_add (ret, "", true, false);
- BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
- if (loc == (bfd_size_type) -1)
- {
- _bfd_stringtab_free (ret);
- ret = NULL;
- }
- }
- return ret;
+ H_PUT_WORD (abfd, src->d_tag, dst->d_tag);
+ H_PUT_WORD (abfd, src->d_un.d_val, dst->d_un.d_val);
}
\f
/* ELF .o/exec file reading */
-/* Create a new bfd section from an ELF section header. */
-
-static boolean
-bfd_section_from_shdr (abfd, shindex)
- bfd *abfd;
- unsigned int shindex;
-{
- Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
- Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
- char *name;
-
- name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
-
- switch (hdr->sh_type)
- {
- case SHT_NULL:
- /* Inactive section. Throw it away. */
- return true;
-
- case SHT_PROGBITS: /* Normal section with contents. */
- case SHT_DYNAMIC: /* Dynamic linking information. */
- case SHT_NOBITS: /* .bss section. */
- case SHT_HASH: /* .hash section. */
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_SYMTAB: /* A symbol table */
- if (elf_onesymtab (abfd) == shindex)
- return true;
-
- BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
- BFD_ASSERT (elf_onesymtab (abfd) == 0);
- elf_onesymtab (abfd) = shindex;
- elf_tdata (abfd)->symtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr;
- abfd->flags |= HAS_SYMS;
-
- /* Sometimes a shared object will map in the symbol table. If
- SHF_ALLOC is set, and this is a shared object, then we also
- treat this section as a BFD section. We can not base the
- decision purely on SHF_ALLOC, because that flag is sometimes
- set in a relocateable object file, which would confuse the
- linker. */
- if ((hdr->sh_flags & SHF_ALLOC) != 0
- && (abfd->flags & DYNAMIC) != 0
- && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
-
- return true;
-
- case SHT_DYNSYM: /* A dynamic symbol table */
- if (elf_dynsymtab (abfd) == shindex)
- return true;
-
- BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
- BFD_ASSERT (elf_dynsymtab (abfd) == 0);
- elf_dynsymtab (abfd) = shindex;
- elf_tdata (abfd)->dynsymtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr;
- abfd->flags |= HAS_SYMS;
-
- /* Besides being a symbol table, we also treat this as a regular
- section, so that objcopy can handle it. */
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_STRTAB: /* A string table */
- if (hdr->bfd_section != NULL)
- return true;
- if (ehdr->e_shstrndx == shindex)
- {
- elf_tdata (abfd)->shstrtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
- return true;
- }
- {
- unsigned int i;
-
- for (i = 1; i < ehdr->e_shnum; i++)
- {
- Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
- if (hdr2->sh_link == shindex)
- {
- if (! bfd_section_from_shdr (abfd, i))
- return false;
- if (elf_onesymtab (abfd) == i)
- {
- elf_tdata (abfd)->strtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] =
- &elf_tdata (abfd)->strtab_hdr;
- return true;
- }
- if (elf_dynsymtab (abfd) == i)
- {
- elf_tdata (abfd)->dynstrtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] =
- &elf_tdata (abfd)->dynstrtab_hdr;
- /* We also treat this as a regular section, so
- that objcopy can handle it. */
- break;
- }
-#if 0 /* Not handling other string tables specially right now. */
- hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
- /* We have a strtab for some random other section. */
- newsect = (asection *) hdr2->bfd_section;
- if (!newsect)
- break;
- hdr->bfd_section = newsect;
- hdr2 = &elf_section_data (newsect)->str_hdr;
- *hdr2 = *hdr;
- elf_elfsections (abfd)[shindex] = hdr2;
-#endif
- }
- }
- }
-
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_REL:
- case SHT_RELA:
- /* *These* do a lot of work -- but build no sections! */
- {
- asection *target_sect;
- Elf_Internal_Shdr *hdr2;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- /* Get the symbol table. */
- if (! bfd_section_from_shdr (abfd, hdr->sh_link))
- return false;
-
- /* If this reloc section does not use the main symbol table we
- don't treat it as a reloc section. BFD can't adequately
- represent such a section, so at least for now, we don't
- try. We just present it as a normal section. */
- if (hdr->sh_link != elf_onesymtab (abfd))
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- /* Don't allow REL relocations on a machine that uses RELA and
- vice versa. */
- /* @@ Actually, the generic ABI does suggest that both might be
- used in one file. But the four ABI Processor Supplements I
- have access to right now all specify that only one is used on
- each of those architectures. It's conceivable that, e.g., a
- bunch of absolute 32-bit relocs might be more compact in REL
- form even on a RELA machine... */
- BFD_ASSERT (use_rela_p
- ? (hdr->sh_type == SHT_RELA
- && hdr->sh_entsize == sizeof (Elf_External_Rela))
- : (hdr->sh_type == SHT_REL
- && hdr->sh_entsize == sizeof (Elf_External_Rel)));
-
- if (! bfd_section_from_shdr (abfd, hdr->sh_info))
- return false;
- target_sect = section_from_elf_index (abfd, hdr->sh_info);
- if (target_sect == NULL)
- return false;
-
- hdr2 = &elf_section_data (target_sect)->rel_hdr;
- *hdr2 = *hdr;
- elf_elfsections (abfd)[shindex] = hdr2;
- target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
- target_sect->flags |= SEC_RELOC;
- target_sect->relocation = NULL;
- target_sect->rel_filepos = hdr->sh_offset;
- abfd->flags |= HAS_RELOC;
- return true;
- }
- break;
-
- case SHT_NOTE:
-#if 0
- fprintf (stderr, "Note Sections not yet supported.\n");
- BFD_FAIL ();
-#endif
- break;
-
- case SHT_SHLIB:
-#if 0
- fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n");
-#endif
- return true;
-
- default:
- /* Check for any processor-specific section types. */
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (bed->elf_backend_section_from_shdr)
- (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
- }
- break;
- }
-
- return true;
-}
-
-boolean
-elf_new_section_hook (abfd, sec)
- bfd *abfd
- ;
- asection *sec;
-{
- struct bfd_elf_section_data *sdata;
-
- sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
- if (!sdata)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- sec->used_by_bfd = (PTR) sdata;
- memset (sdata, 0, sizeof (*sdata));
- return true;
-}
-
-/* Create a new bfd section from an ELF program header.
-
- Since program segments have no names, we generate a synthetic name
- of the form segment<NUM>, where NUM is generally the index in the
- program header table. For segments that are split (see below) we
- generate the names segment<NUM>a and segment<NUM>b.
-
- Note that some program segments may have a file size that is different than
- (less than) the memory size. All this means is that at execution the
- system must allocate the amount of memory specified by the memory size,
- but only initialize it with the first "file size" bytes read from the
- file. This would occur for example, with program segments consisting
- of combined data+bss.
-
- To handle the above situation, this routine generates TWO bfd sections
- for the single program segment. The first has the length specified by
- the file size of the segment, and the second has the length specified
- by the difference between the two sizes. In effect, the segment is split
- into it's initialized and uninitialized parts.
-
- */
-
-static boolean
-bfd_section_from_phdr (abfd, hdr, index)
- bfd *abfd;
- Elf_Internal_Phdr *hdr;
- int index;
-{
- asection *newsect;
- char *name;
- char namebuf[64];
- int split;
-
- split = ((hdr->p_memsz > 0) &&
- (hdr->p_filesz > 0) &&
- (hdr->p_memsz > hdr->p_filesz));
- sprintf (namebuf, split ? "segment%da" : "segment%d", index);
- name = bfd_alloc (abfd, strlen (namebuf) + 1);
- if (!name)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strcpy (name, namebuf);
- newsect = bfd_make_section (abfd, name);
- if (newsect == NULL)
- return false;
- newsect->vma = hdr->p_vaddr;
- newsect->_raw_size = hdr->p_filesz;
- newsect->filepos = hdr->p_offset;
- newsect->flags |= SEC_HAS_CONTENTS;
- if (hdr->p_type == PT_LOAD)
- {
- newsect->flags |= SEC_ALLOC;
- newsect->flags |= SEC_LOAD;
- if (hdr->p_flags & PF_X)
- {
- /* FIXME: all we known is that it has execute PERMISSION,
- may be data. */
- newsect->flags |= SEC_CODE;
- }
- }
- if (!(hdr->p_flags & PF_W))
- {
- newsect->flags |= SEC_READONLY;
- }
-
- if (split)
- {
- sprintf (namebuf, "segment%db", index);
- name = bfd_alloc (abfd, strlen (namebuf) + 1);
- if (!name)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strcpy (name, namebuf);
- newsect = bfd_make_section (abfd, name);
- if (newsect == NULL)
- return false;
- newsect->vma = hdr->p_vaddr + hdr->p_filesz;
- newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
- if (hdr->p_type == PT_LOAD)
- {
- newsect->flags |= SEC_ALLOC;
- if (hdr->p_flags & PF_X)
- newsect->flags |= SEC_CODE;
- }
- if (!(hdr->p_flags & PF_W))
- newsect->flags |= SEC_READONLY;
- }
-
- return true;
-}
-
/* Begin processing a given object.
First we validate the file by reading in the ELF header and checking
the magic number. */
-static INLINE boolean
+static INLINE bfd_boolean
elf_file_p (x_ehdrp)
Elf_External_Ehdr *x_ehdrp;
{
Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
Elf_External_Shdr x_shdr; /* Section header table entry, external form */
- Elf_Internal_Shdr *i_shdrp = NULL; /* Section header table, internal form */
+ Elf_Internal_Shdr i_shdr;
+ Elf_Internal_Shdr *i_shdrp; /* Section header table, internal form */
unsigned int shindex;
char *shstrtab; /* Internal copy of section header stringtab */
struct elf_backend_data *ebd;
- struct elf_obj_tdata *preserved_tdata = elf_tdata (abfd);
- struct elf_obj_tdata *new_tdata = NULL;
+ struct bfd_preserve preserve;
+ asection *s;
+ bfd_size_type amt;
+
+ preserve.marker = NULL;
/* Read in the ELF header in external format. */
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ if (bfd_bread ((PTR) & x_ehdr, (bfd_size_type) sizeof (x_ehdr), abfd)
+ != sizeof (x_ehdr))
{
if (bfd_get_error () != bfd_error_system_call)
goto got_wrong_format_error;
make use of. The magic number must match, the address size ('class')
and byte-swapping must match our XVEC entry, and it must have a
section header table (FIXME: See comments re sections at top of this
- file). */
+ file). */
- if ((elf_file_p (&x_ehdr) == false) ||
- (x_ehdr.e_ident[EI_VERSION] != EV_CURRENT) ||
- (x_ehdr.e_ident[EI_CLASS] != ELFCLASS))
+ if (! elf_file_p (&x_ehdr)
+ || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
+ || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
goto got_wrong_format_error;
/* Check that file's byte order matches xvec's */
switch (x_ehdr.e_ident[EI_DATA])
{
case ELFDATA2MSB: /* Big-endian */
- if (!abfd->xvec->header_byteorder_big_p)
+ if (! bfd_header_big_endian (abfd))
goto got_wrong_format_error;
break;
case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->header_byteorder_big_p)
+ if (! bfd_header_little_endian (abfd))
goto got_wrong_format_error;
break;
case ELFDATANONE: /* No data encoding specified */
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
the tdata pointer in the bfd. */
- new_tdata = ((struct elf_obj_tdata *)
- bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)));
- if (new_tdata == NULL)
- goto got_no_memory_error;
- elf_tdata (abfd) = new_tdata;
+ amt = sizeof (struct elf_obj_tdata);
+ preserve.marker = bfd_zalloc (abfd, amt);
+ if (preserve.marker == NULL)
+ goto got_no_match;
+ if (!bfd_preserve_save (abfd, &preserve))
+ goto got_no_match;
+
+ elf_tdata (abfd) = preserve.marker;
/* Now that we know the byte order, swap in the rest of the header */
i_ehdrp = elf_elfheader (abfd);
elf_debug_file (i_ehdrp);
#endif
- /* If there is no section header table, we're hosed. */
- if (i_ehdrp->e_shoff == 0)
+ /* Reject ET_CORE (header indicates core file, not object file) */
+ if (i_ehdrp->e_type == ET_CORE)
+ goto got_wrong_format_error;
+
+ /* If this is a relocatable file and there is no section header
+ table, then we're hosed. */
+ if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_type == ET_REL)
goto got_wrong_format_error;
/* As a simple sanity check, verify that the what BFD thinks is the
size of each section header table entry actually matches the size
- recorded in the file. */
- if (i_ehdrp->e_shentsize != sizeof (x_shdr))
+ recorded in the file, but only if there are any sections. */
+ if (i_ehdrp->e_shentsize != sizeof (x_shdr) && i_ehdrp->e_shnum != 0)
+ goto got_wrong_format_error;
+
+ /* Further sanity check. */
+ if (i_ehdrp->e_shoff == 0 && i_ehdrp->e_shnum != 0)
goto got_wrong_format_error;
ebd = get_elf_backend_data (abfd);
/* Check that the ELF e_machine field matches what this particular
BFD format expects. */
- if (ebd->elf_machine_code != i_ehdrp->e_machine)
+ if (ebd->elf_machine_code != i_ehdrp->e_machine
+ && (ebd->elf_machine_alt1 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt1)
+ && (ebd->elf_machine_alt2 == 0
+ || i_ehdrp->e_machine != ebd->elf_machine_alt2))
{
const bfd_target * const *target_ptr;
if ((*target_ptr)->flavour != bfd_target_elf_flavour)
continue;
back = (struct elf_backend_data *) (*target_ptr)->backend_data;
- if (back->elf_machine_code == i_ehdrp->e_machine)
+ if (back->elf_machine_code == i_ehdrp->e_machine
+ || (back->elf_machine_alt1 != 0
+ && back->elf_machine_alt1 == i_ehdrp->e_machine)
+ || (back->elf_machine_alt2 != 0
+ && back->elf_machine_alt2 == i_ehdrp->e_machine))
{
/* target_ptr is an ELF backend which matches this
object file, so reject the generic ELF target. */
abfd->flags |= D_PAGED;
if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
- goto got_no_match;
+ {
+ /* It's OK if this fails for the generic target. */
+ if (ebd->elf_machine_code != EM_NONE)
+ goto got_no_match;
+ }
+
+ /* Remember the entry point specified in the ELF file header. */
+ bfd_set_start_address (abfd, i_ehdrp->e_entry);
+
+ if (i_ehdrp->e_shoff != 0)
+ {
+ /* Seek to the section header table in the file. */
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0)
+ goto got_no_match;
- /* Remember the entry point specified in the ELF file header. */
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ /* Read the first section header at index 0, and convert to internal
+ form. */
+ if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
+ != sizeof (x_shdr))
+ goto got_no_match;
+ elf_swap_shdr_in (abfd, &x_shdr, &i_shdr);
+
+ /* If the section count is zero, the actual count is in the first
+ section header. */
+ if (i_ehdrp->e_shnum == SHN_UNDEF)
+ i_ehdrp->e_shnum = i_shdr.sh_size;
+
+ /* And similarly for the string table index. */
+ if (i_ehdrp->e_shstrndx == SHN_XINDEX)
+ i_ehdrp->e_shstrndx = i_shdr.sh_link;
+ }
/* Allocate space for a copy of the section header table in
- internal form, seek to the section header table in the file,
- read it in, and convert it to internal form. */
- i_shdrp = ((Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (*i_shdrp) * i_ehdrp->e_shnum));
- elf_elfsections (abfd) = ((Elf_Internal_Shdr **)
- bfd_alloc (abfd,
- sizeof (i_shdrp) * i_ehdrp->e_shnum));
- if (!i_shdrp || !elf_elfsections (abfd))
- goto got_no_memory_error;
- if (bfd_seek (abfd, i_ehdrp->e_shoff, SEEK_SET) != 0)
- goto got_no_match;
- for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
+ internal form. */
+ if (i_ehdrp->e_shnum != 0)
{
- if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr))
+ Elf_Internal_Shdr *shdrp;
+ unsigned int num_sec;
+
+ amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
+ i_shdrp = (Elf_Internal_Shdr *) bfd_alloc (abfd, amt);
+ if (!i_shdrp)
+ goto got_no_match;
+ num_sec = i_ehdrp->e_shnum;
+ if (num_sec > SHN_LORESERVE)
+ num_sec += SHN_HIRESERVE + 1 - SHN_LORESERVE;
+ elf_numsections (abfd) = num_sec;
+ amt = sizeof (i_shdrp) * num_sec;
+ elf_elfsections (abfd) = (Elf_Internal_Shdr **) bfd_alloc (abfd, amt);
+ if (!elf_elfsections (abfd))
goto got_no_match;
- elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
- elf_elfsections (abfd)[shindex] = i_shdrp + shindex;
+
+ memcpy (i_shdrp, &i_shdr, sizeof (*i_shdrp));
+ shdrp = i_shdrp;
+ shindex = 0;
+ if (num_sec > SHN_LORESERVE)
+ {
+ for ( ; shindex < SHN_LORESERVE; shindex++)
+ elf_elfsections (abfd)[shindex] = shdrp++;
+ for ( ; shindex < SHN_HIRESERVE + 1; shindex++)
+ elf_elfsections (abfd)[shindex] = i_shdrp;
+ }
+ for ( ; shindex < num_sec; shindex++)
+ elf_elfsections (abfd)[shindex] = shdrp++;
+
+ /* Read in the rest of the section header table and convert it
+ to internal form. */
+ for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+ {
+ if (bfd_bread ((PTR) & x_shdr, (bfd_size_type) sizeof x_shdr, abfd)
+ != sizeof (x_shdr))
+ goto got_no_match;
+ elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
+
+ /* If the section is loaded, but not page aligned, clear
+ D_PAGED. */
+ if (i_shdrp[shindex].sh_size != 0
+ && (i_shdrp[shindex].sh_flags & SHF_ALLOC) != 0
+ && i_shdrp[shindex].sh_type != SHT_NOBITS
+ && (((i_shdrp[shindex].sh_addr - i_shdrp[shindex].sh_offset)
+ % ebd->maxpagesize)
+ != 0))
+ abfd->flags &= ~D_PAGED;
+ }
}
- if (i_ehdrp->e_shstrndx)
+
+ if (i_ehdrp->e_shstrndx && i_ehdrp->e_shoff)
{
if (! bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx))
goto got_no_match;
}
+ /* Read in the program headers. */
+ if (i_ehdrp->e_phnum == 0)
+ elf_tdata (abfd)->phdr = NULL;
+ else
+ {
+ Elf_Internal_Phdr *i_phdr;
+ unsigned int i;
+
+ amt = i_ehdrp->e_phnum * sizeof (Elf_Internal_Phdr);
+ elf_tdata (abfd)->phdr = (Elf_Internal_Phdr *) bfd_alloc (abfd, amt);
+ if (elf_tdata (abfd)->phdr == NULL)
+ goto got_no_match;
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_phoff, SEEK_SET) != 0)
+ goto got_no_match;
+ i_phdr = elf_tdata (abfd)->phdr;
+ for (i = 0; i < i_ehdrp->e_phnum; i++, i_phdr++)
+ {
+ Elf_External_Phdr x_phdr;
+
+ if (bfd_bread ((PTR) &x_phdr, (bfd_size_type) sizeof x_phdr, abfd)
+ != sizeof x_phdr)
+ goto got_no_match;
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
+ }
+ }
+
/* Read in the string table containing the names of the sections. We
- will need the base pointer to this table later. */
+ will need the base pointer to this table later. */
/* We read this inline now, so that we don't have to go through
bfd_section_from_shdr with it (since this particular strtab is
used to find all of the ELF section names.) */
- shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
- if (!shstrtab)
- goto got_no_match;
-
- /* Once all of the section headers have been read and converted, we
- can start processing them. Note that the first section header is
- a dummy placeholder entry, so we ignore it. */
-
- for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+ if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff)
{
- if (! bfd_section_from_shdr (abfd, shindex))
+ unsigned int num_sec;
+
+ shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
+ if (!shstrtab)
goto got_no_match;
+
+ /* Once all of the section headers have been read and converted, we
+ can start processing them. Note that the first section header is
+ a dummy placeholder entry, so we ignore it. */
+ num_sec = elf_numsections (abfd);
+ for (shindex = 1; shindex < num_sec; shindex++)
+ {
+ if (! bfd_section_from_shdr (abfd, shindex))
+ goto got_no_match;
+ if (shindex == SHN_LORESERVE - 1)
+ shindex += SHN_HIRESERVE + 1 - SHN_LORESERVE;
+ }
}
/* Let the backend double check the format and override global
information. */
if (ebd->elf_backend_object_p)
{
- if ((*ebd->elf_backend_object_p) (abfd) == false)
+ if (! (*ebd->elf_backend_object_p) (abfd))
goto got_wrong_format_error;
}
- return (abfd->xvec);
+ /* If we have created any reloc sections that are associated with
+ debugging sections, mark the reloc sections as debugging as well. */
+ for (s = abfd->sections; s != NULL; s = s->next)
+ {
+ if ((elf_section_data (s)->this_hdr.sh_type == SHT_REL
+ || elf_section_data (s)->this_hdr.sh_type == SHT_RELA)
+ && elf_section_data (s)->this_hdr.sh_info > 0)
+ {
+ unsigned long targ_index;
+ asection *targ_sec;
+
+ targ_index = elf_section_data (s)->this_hdr.sh_info;
+ targ_sec = bfd_section_from_elf_index (abfd, targ_index);
+ if (targ_sec != NULL
+ && (targ_sec->flags & SEC_DEBUGGING) != 0)
+ s->flags |= SEC_DEBUGGING;
+ }
+ }
+
+ bfd_preserve_finish (abfd, &preserve);
+ return abfd->xvec;
-got_wrong_format_error:
+ got_wrong_format_error:
+ /* There is way too much undoing of half-known state here. The caller,
+ bfd_check_format_matches, really shouldn't iterate on live bfd's to
+ check match/no-match like it does. We have to rely on that a call to
+ bfd_default_set_arch_mach with the previously known mach, undoes what
+ was done by the first bfd_default_set_arch_mach (with mach 0) here.
+ For this to work, only elf-data and the mach may be changed by the
+ target-specific elf_backend_object_p function. Note that saving the
+ whole bfd here and restoring it would be even worse; the first thing
+ you notice is that the cached bfd file position gets out of sync. */
bfd_set_error (bfd_error_wrong_format);
- goto got_no_match;
-got_no_memory_error:
- bfd_set_error (bfd_error_no_memory);
- goto got_no_match;
-got_no_match:
- if (new_tdata != NULL
- && new_tdata->elf_sect_ptr != NULL)
- bfd_release (abfd, new_tdata->elf_sect_ptr);
- if (i_shdrp != NULL)
- bfd_release (abfd, i_shdrp);
- if (new_tdata != NULL)
- bfd_release (abfd, new_tdata);
- elf_tdata (abfd) = preserved_tdata;
- return (NULL);
+
+ got_no_match:
+ if (preserve.marker != NULL)
+ bfd_preserve_restore (abfd, &preserve);
+ return NULL;
}
\f
-
/* ELF .o/exec file writing */
-/* Takes a bfd and a symbol, returns a pointer to the elf specific area
- of the symbol if there is one. */
-static INLINE elf_symbol_type *
-elf_symbol_from (ignore_abfd, symbol)
- bfd *ignore_abfd;
- asymbol *symbol;
-{
- if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
- return 0;
-
- if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL)
- return 0;
-
- return (elf_symbol_type *) symbol;
-}
+/* Write out the relocs. */
void
-write_relocs (abfd, sec, xxx)
+elf_write_relocs (abfd, sec, data)
bfd *abfd;
asection *sec;
- PTR xxx;
+ PTR data;
{
+ bfd_boolean *failedp = (bfd_boolean *) data;
Elf_Internal_Shdr *rela_hdr;
- Elf_External_Rela *outbound_relocas;
- Elf_External_Rel *outbound_relocs;
- int idx;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- asymbol *last_sym = 0;
- int last_sym_idx = 9999999; /* should always be written before use */
+ bfd_vma addr_offset;
+ void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
+ size_t extsize;
+ bfd_byte *dst_rela;
+ unsigned int idx;
+ asymbol *last_sym;
+ int last_sym_idx;
+
+ /* If we have already failed, don't do anything. */
+ if (*failedp)
+ return;
if ((sec->flags & SEC_RELOC) == 0)
return;
rela_hdr = &elf_section_data (sec)->rel_hdr;
rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
- rela_hdr->contents = (void *) bfd_alloc (abfd, rela_hdr->sh_size);
- if (!rela_hdr->contents)
+ rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
+ if (rela_hdr->contents == NULL)
{
- bfd_set_error (bfd_error_no_memory);
- abort (); /* FIXME */
+ *failedp = TRUE;
+ return;
}
- /* orelocation has the data, reloc_count has the count... */
- if (use_rela_p)
+ /* Figure out whether the relocations are RELA or REL relocations. */
+ if (rela_hdr->sh_type == SHT_RELA)
+ {
+ swap_out = elf_swap_reloca_out;
+ extsize = sizeof (Elf_External_Rela);
+ }
+ else if (rela_hdr->sh_type == SHT_REL)
{
- outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
+ swap_out = elf_swap_reloc_out;
+ extsize = sizeof (Elf_External_Rel);
+ }
+ else
+ /* Every relocation section should be either an SHT_RELA or an
+ SHT_REL section. */
+ abort ();
- for (idx = 0; idx < sec->reloc_count; idx++)
- {
- Elf_Internal_Rela dst_rela;
- Elf_External_Rela *src_rela;
- arelent *ptr;
- asymbol *sym;
- int n;
-
- ptr = sec->orelocation[idx];
- src_rela = outbound_relocas + idx;
- if (!(abfd->flags & EXEC_P))
- dst_rela.r_offset = ptr->address - sec->vma;
- else
- dst_rela.r_offset = ptr->address;
+ /* The address of an ELF reloc is section relative for an object
+ file, and absolute for an executable file or shared library.
+ The address of a BFD reloc is always section relative. */
+ addr_offset = 0;
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ addr_offset = sec->vma;
- sym = *ptr->sym_ptr_ptr;
- if (sym == last_sym)
- n = last_sym_idx;
- else
- {
- last_sym = sym;
- last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
- }
- dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
+ /* orelocation has the data, reloc_count has the count... */
+ last_sym = 0;
+ last_sym_idx = 0;
+ dst_rela = rela_hdr->contents;
- dst_rela.r_addend = ptr->addend;
- elf_swap_reloca_out (abfd, &dst_rela, src_rela);
- }
- }
- else
- /* REL relocations */
+ for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize)
{
- outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
-
- for (idx = 0; idx < sec->reloc_count; idx++)
+ Elf_Internal_Rela src_rela;
+ arelent *ptr;
+ asymbol *sym;
+ int n;
+
+ ptr = sec->orelocation[idx];
+ sym = *ptr->sym_ptr_ptr;
+ if (sym == last_sym)
+ n = last_sym_idx;
+ else if (bfd_is_abs_section (sym->section) && sym->value == 0)
+ n = STN_UNDEF;
+ else
{
- Elf_Internal_Rel dst_rel;
- Elf_External_Rel *src_rel;
- arelent *ptr;
- int n;
- asymbol *sym;
-
- ptr = sec->orelocation[idx];
- sym = *ptr->sym_ptr_ptr;
- src_rel = outbound_relocs + idx;
- if (!(abfd->flags & EXEC_P))
- dst_rel.r_offset = ptr->address - sec->vma;
- else
- dst_rel.r_offset = ptr->address;
-
- if (sym == last_sym)
- n = last_sym_idx;
- else
+ last_sym = sym;
+ n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
+ if (n < 0)
{
- last_sym = sym;
- last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
+ *failedp = TRUE;
+ return;
}
- dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
+ last_sym_idx = n;
+ }
- elf_swap_reloc_out (abfd, &dst_rel, src_rel);
+ if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
+ && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
+ && ! _bfd_elf_validate_reloc (abfd, ptr))
+ {
+ *failedp = TRUE;
+ return;
}
+
+ src_rela.r_offset = ptr->address + addr_offset;
+ src_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
+ src_rela.r_addend = ptr->addend;
+ (*swap_out) (abfd, &src_rela, dst_rela);
}
}
-/* Set up an ELF internal section header for a section. */
+/* Write out the program headers. */
-/*ARGSUSED*/
-static void
-elf_fake_sections (abfd, asect, failedptrarg)
+int
+elf_write_out_phdrs (abfd, phdr, count)
bfd *abfd;
- asection *asect;
- PTR failedptrarg;
+ const Elf_Internal_Phdr *phdr;
+ unsigned int count;
{
- boolean *failedptr = (boolean *) failedptrarg;
- Elf_Internal_Shdr *this_hdr;
-
- if (*failedptr)
+ while (count--)
{
- /* We already failed; just get out of the bfd_map_over_sections
- loop. */
- return;
+ Elf_External_Phdr extphdr;
+ elf_swap_phdr_out (abfd, phdr, &extphdr);
+ if (bfd_bwrite (&extphdr, (bfd_size_type) sizeof (Elf_External_Phdr),
+ abfd) != sizeof (Elf_External_Phdr))
+ return -1;
+ phdr++;
}
+ return 0;
+}
- this_hdr = &elf_section_data (asect)->this_hdr;
-
- this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
- asect->name,
- true, false);
- if (this_hdr->sh_name == (unsigned long) -1)
- {
- *failedptr = true;
- return;
- }
+/* Write out the section headers and the ELF file header. */
- this_hdr->sh_flags = 0;
- if ((asect->flags & SEC_ALLOC) != 0)
- this_hdr->sh_addr = asect->vma;
- else
- this_hdr->sh_addr = 0;
- this_hdr->sh_offset = 0;
- this_hdr->sh_size = asect->_raw_size;
- this_hdr->sh_link = 0;
- this_hdr->sh_info = 0;
- this_hdr->sh_addralign = 1 << asect->alignment_power;
- this_hdr->sh_entsize = 0;
-
- this_hdr->bfd_section = asect;
- this_hdr->contents = NULL;
-
- /* FIXME: This should not be based on section names. */
- if (strcmp (asect->name, ".dynstr") == 0)
- this_hdr->sh_type = SHT_STRTAB;
- else if (strcmp (asect->name, ".hash") == 0)
- {
- this_hdr->sh_type = SHT_HASH;
- this_hdr->sh_entsize = ARCH_SIZE / 8;
- }
- else if (strcmp (asect->name, ".dynsym") == 0)
- {
- this_hdr->sh_type = SHT_DYNSYM;
- this_hdr->sh_entsize = sizeof (Elf_External_Sym);
- }
- else if (strcmp (asect->name, ".dynamic") == 0)
- {
- this_hdr->sh_type = SHT_DYNAMIC;
- this_hdr->sh_entsize = sizeof (Elf_External_Dyn);
- }
- else if (strncmp (asect->name, ".rela", 5) == 0
- && get_elf_backend_data (abfd)->use_rela_p)
- {
- this_hdr->sh_type = SHT_RELA;
- this_hdr->sh_entsize = sizeof (Elf_External_Rela);
- }
- else if (strncmp (asect->name, ".rel", 4) == 0
- && ! get_elf_backend_data (abfd)->use_rela_p)
- {
- this_hdr->sh_type = SHT_REL;
- this_hdr->sh_entsize = sizeof (Elf_External_Rel);
- }
- else if (strcmp (asect->name, ".note") == 0)
- this_hdr->sh_type = SHT_NOTE;
- else if (strncmp (asect->name, ".stab", 5) == 0
- && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
- this_hdr->sh_type = SHT_STRTAB;
- else if ((asect->flags & SEC_ALLOC) != 0
- && (asect->flags & SEC_LOAD) != 0)
- this_hdr->sh_type = SHT_PROGBITS;
- else if ((asect->flags & SEC_ALLOC) != 0
- && ((asect->flags & SEC_LOAD) == 0))
- {
- BFD_ASSERT (strcmp (asect->name, ".bss") == 0
- || strcmp (asect->name, ".sbss") == 0);
- this_hdr->sh_type = SHT_NOBITS;
- }
- else
- {
- /* Who knows? */
- this_hdr->sh_type = SHT_PROGBITS;
- }
+bfd_boolean
+elf_write_shdrs_and_ehdr (abfd)
+ bfd *abfd;
+{
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Shdr *x_shdrp; /* Section header table, external form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ unsigned int count;
+ bfd_size_type amt;
- if ((asect->flags & SEC_ALLOC) != 0)
- this_hdr->sh_flags |= SHF_ALLOC;
- if ((asect->flags & SEC_READONLY) == 0)
- this_hdr->sh_flags |= SHF_WRITE;
- if ((asect->flags & SEC_CODE) != 0)
- this_hdr->sh_flags |= SHF_EXECINSTR;
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
- /* Check for processor-specific section types. */
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ /* swap the header before spitting it out... */
- if (bed->elf_backend_fake_sections)
- (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
- }
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
+#endif
+ elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
+ amt = sizeof (x_ehdr);
+ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
+ || bfd_bwrite ((PTR) & x_ehdr, amt, abfd) != amt)
+ return FALSE;
+
+ /* Some fields in the first section header handle overflow of ehdr
+ fields. */
+ if (i_ehdrp->e_shnum >= SHN_LORESERVE)
+ i_shdrp[0]->sh_size = i_ehdrp->e_shnum;
+ if (i_ehdrp->e_shstrndx >= SHN_LORESERVE)
+ i_shdrp[0]->sh_link = i_ehdrp->e_shstrndx;
+
+ /* at this point we've concocted all the ELF sections... */
+ amt = i_ehdrp->e_shnum;
+ amt *= sizeof (*x_shdrp);
+ x_shdrp = (Elf_External_Shdr *) bfd_alloc (abfd, amt);
+ if (!x_shdrp)
+ return FALSE;
- /* If the section has relocs, set up a section header for the
- SHT_REL[A] section. */
- if ((asect->flags & SEC_RELOC) != 0)
+ for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
{
- Elf_Internal_Shdr *rela_hdr;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- char *name;
+#if DEBUG & 2
+ elf_debug_section (count, *i_shdrp);
+#endif
+ elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
- rela_hdr = &elf_section_data (asect)->rel_hdr;
- name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
- if (name == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- *failedptr = true;
- return;
- }
- sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
- rela_hdr->sh_name =
- (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
- true, false);
- if (rela_hdr->sh_name == (unsigned int) -1)
- {
- *failedptr = true;
- return;
- }
- rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
- rela_hdr->sh_entsize = (use_rela_p
- ? sizeof (Elf_External_Rela)
- : sizeof (Elf_External_Rel));
- rela_hdr->sh_addralign = FILE_ALIGN;
- rela_hdr->sh_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_size = 0;
- rela_hdr->sh_offset = 0;
+ if (count == SHN_LORESERVE - 1)
+ i_shdrp += SHN_HIRESERVE + 1 - SHN_LORESERVE;
}
-}
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
+ || bfd_bwrite ((PTR) x_shdrp, amt, abfd) != amt)
+ return FALSE;
+
+ /* need to dump the string table too... */
-/* Assign all ELF section numbers. The dummy first section is handled here
- too. The link/info pointers for the standard section types are filled
- in here too, while we're at it. */
+ return TRUE;
+}
-static boolean
-assign_section_numbers (abfd)
+long
+elf_slurp_symbol_table (abfd, symptrs, dynamic)
bfd *abfd;
+ asymbol **symptrs; /* Buffer for generated bfd symbols */
+ bfd_boolean dynamic;
{
- struct elf_obj_tdata *t = elf_tdata (abfd);
- asection *sec;
- unsigned int section_number;
- Elf_Internal_Shdr **i_shdrp;
-
- section_number = 1;
-
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- struct bfd_elf_section_data *d = elf_section_data (sec);
-
- d->this_idx = section_number++;
- if ((sec->flags & SEC_RELOC) == 0)
- d->rel_idx = 0;
- else
- d->rel_idx = section_number++;
- }
-
- t->shstrtab_section = section_number++;
- elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
- t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
-
- if (abfd->symcount > 0)
- {
- t->symtab_section = section_number++;
- t->strtab_section = section_number++;
- }
-
- elf_elfheader (abfd)->e_shnum = section_number;
-
- /* Set up the list of section header pointers, in agreement with the
- indices. */
- i_shdrp = ((Elf_Internal_Shdr **)
- bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
- if (i_shdrp == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- i_shdrp[0] = ((Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
- if (i_shdrp[0] == NULL)
- {
- bfd_release (abfd, i_shdrp);
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
-
- elf_elfsections (abfd) = i_shdrp;
-
- i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
- if (abfd->symcount > 0)
- {
- i_shdrp[t->symtab_section] = &t->symtab_hdr;
- i_shdrp[t->strtab_section] = &t->strtab_hdr;
- t->symtab_hdr.sh_link = t->strtab_section;
- }
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- struct bfd_elf_section_data *d = elf_section_data (sec);
- asection *s;
- const char *name;
-
- i_shdrp[d->this_idx] = &d->this_hdr;
- if (d->rel_idx != 0)
- i_shdrp[d->rel_idx] = &d->rel_hdr;
-
- /* Fill in the sh_link and sh_info fields while we're at it. */
-
- /* sh_link of a reloc section is the section index of the symbol
- table. sh_info is the section index of the section to which
- the relocation entries apply. */
- if (d->rel_idx != 0)
- {
- d->rel_hdr.sh_link = t->symtab_section;
- d->rel_hdr.sh_info = d->this_idx;
- }
-
- switch (d->this_hdr.sh_type)
- {
- case SHT_REL:
- case SHT_RELA:
- /* A reloc section which we are treating as a normal BFD
- section. sh_link is the section index of the symbol
- table. sh_info is the section index of the section to
- which the relocation entries apply. We assume that an
- allocated reloc section uses the dynamic symbol table.
- FIXME: How can we be sure? */
- s = bfd_get_section_by_name (abfd, ".dynsym");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
-
- /* We look up the section the relocs apply to by name. */
- name = sec->name;
- if (d->this_hdr.sh_type == SHT_REL)
- name += 4;
- else
- name += 5;
- s = bfd_get_section_by_name (abfd, name);
- if (s != NULL)
- d->this_hdr.sh_info = elf_section_data (s)->this_idx;
- break;
-
- case SHT_STRTAB:
- /* We assume that a section named .stab*str is a stabs
- string section. We look for a section with the same name
- but without the trailing ``str'', and set its sh_link
- field to point to this section. */
- if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
- && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
- {
- size_t len;
- char *alc;
-
- len = strlen (sec->name);
- alc = (char *) malloc (len - 2);
- if (alc == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strncpy (alc, sec->name, len - 3);
- alc[len - 3] = '\0';
- s = bfd_get_section_by_name (abfd, alc);
- free (alc);
- if (s != NULL)
- {
- elf_section_data (s)->this_hdr.sh_link = d->this_idx;
-
- /* This is a .stab section. */
- elf_section_data (s)->this_hdr.sh_entsize =
- 4 + 2 * (ARCH_SIZE / 8);
- }
- }
- break;
-
- case SHT_DYNAMIC:
- case SHT_DYNSYM:
- /* sh_link is the section header index of the string table
- used for the dynamic entries or symbol table. */
- s = bfd_get_section_by_name (abfd, ".dynstr");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
- break;
-
- case SHT_HASH:
- /* sh_link is the section header index of the symbol table
- this hash table is for. */
- s = bfd_get_section_by_name (abfd, ".dynsym");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
- break;
- }
- }
-
- return true;
-}
-
-/* Map symbol from it's internal number to the external number, moving
- all local symbols to be at the head of the list. */
-
-static INLINE int
-sym_is_global (abfd, sym)
- bfd *abfd;
- asymbol *sym;
-{
- /* If the backend has a special mapping, use it. */
- if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
- return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
- (abfd, sym));
-
- if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
- {
- if (sym->flags & BSF_LOCAL)
- abort ();
- return 1;
- }
- if (sym->section == 0)
- {
- /* Is this valid? */
- abort ();
-
- return 1;
- }
- if (bfd_is_und_section (sym->section))
- return 1;
- if (bfd_is_com_section (sym->section))
- return 1;
- if (sym->flags & (BSF_LOCAL | BSF_SECTION_SYM | BSF_FILE))
- return 0;
- return 0;
-}
-
-static boolean
-elf_map_symbols (abfd)
- bfd *abfd;
-{
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- asymbol **sect_syms;
- int num_locals = 0;
- int num_globals = 0;
- int num_locals2 = 0;
- int num_globals2 = 0;
- int max_index = 0;
- int num_sections = 0;
- int idx;
- asection *asect;
- asymbol **new_syms;
-
-#ifdef DEBUG
- fprintf (stderr, "elf_map_symbols\n");
- fflush (stderr);
-#endif
-
- /* Add a section symbol for each BFD section. FIXME: Is this really
- necessary? */
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (max_index < asect->index)
- max_index = asect->index;
- }
-
- max_index++;
- sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
- if (sect_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- elf_section_syms (abfd) = sect_syms;
-
- for (idx = 0; idx < symcount; idx++)
- {
- if ((syms[idx]->flags & BSF_SECTION_SYM) != 0)
- {
- asection *sec;
-
- sec = syms[idx]->section;
- if (sec->owner != NULL)
- {
- if (sec->owner != abfd)
- {
- sec = sec->output_section;
- BFD_ASSERT (sec->owner == abfd);
- }
- sect_syms[sec->index] = syms[idx];
- }
- }
- }
-
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- asymbol *sym;
-
- if (sect_syms[asect->index] != NULL)
- continue;
-
- sym = bfd_make_empty_symbol (abfd);
- if (sym == NULL)
- return false;
- sym->the_bfd = abfd;
- sym->name = asect->name;
- sym->value = asect->vma;
- /* Set the flags to 0 to indicate that this one was newly added. */
- sym->flags = 0;
- sym->section = asect;
- sect_syms[asect->index] = sym;
- num_sections++;
-#ifdef DEBUG
- fprintf (stderr,
- "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
- asect->name, (long) asect->vma, asect->index, (long) asect);
-#endif
- }
-
- /* Classify all of the symbols. */
- for (idx = 0; idx < symcount; idx++)
- {
- if (!sym_is_global (abfd, syms[idx]))
- num_locals++;
- else
- num_globals++;
- }
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (sect_syms[asect->index] != NULL
- && sect_syms[asect->index]->flags == 0)
- {
- sect_syms[asect->index]->flags = BSF_SECTION_SYM;
- if (!sym_is_global (abfd, sect_syms[asect->index]))
- num_locals++;
- else
- num_globals++;
- sect_syms[asect->index]->flags = 0;
- }
- }
-
- /* Now sort the symbols so the local symbols are first. */
- new_syms = ((asymbol **)
- bfd_alloc (abfd,
- (num_locals + num_globals) * sizeof (asymbol *)));
- if (new_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (idx = 0; idx < symcount; idx++)
- {
- asymbol *sym = syms[idx];
- int i;
-
- if (!sym_is_global (abfd, sym))
- i = num_locals2++;
- else
- i = num_locals + num_globals2++;
- new_syms[i] = sym;
- sym->udata.i = i + 1;
- }
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (sect_syms[asect->index] != NULL
- && sect_syms[asect->index]->flags == 0)
- {
- asymbol *sym = sect_syms[asect->index];
- int i;
-
- sym->flags = BSF_SECTION_SYM;
- if (!sym_is_global (abfd, sym))
- i = num_locals2++;
- else
- i = num_locals + num_globals2++;
- new_syms[i] = sym;
- sym->udata.i = i + 1;
- }
- }
-
- bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
-
- elf_num_locals (abfd) = num_locals;
- elf_num_globals (abfd) = num_globals;
- return true;
-}
-
-/* Compute the file positions we are going to put the sections at, and
- otherwise prepare to begin writing out the ELF file. If LINK_INFO
- is not NULL, this is being called by the ELF backend linker. */
-
-static boolean
-elf_compute_section_file_positions (abfd, link_info)
- bfd *abfd;
- struct bfd_link_info *link_info;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- boolean failed;
- struct bfd_strtab_hash *strtab;
- Elf_Internal_Shdr *shstrtab_hdr;
-
- if (abfd->output_has_begun)
- return true;
-
- /* Do any elf backend specific processing first. */
- if (bed->elf_backend_begin_write_processing)
- (*bed->elf_backend_begin_write_processing) (abfd, link_info);
-
- if (! prep_headers (abfd))
- return false;
-
- failed = false;
- bfd_map_over_sections (abfd, elf_fake_sections, &failed);
- if (failed)
- return false;
-
- if (!assign_section_numbers (abfd))
- return false;
-
- /* The backend linker builds symbol table information itself. */
- if (link_info == NULL)
- {
- if (! swap_out_syms (abfd, &strtab))
- return false;
- }
-
- shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
- /* sh_name was set in prep_headers. */
- shstrtab_hdr->sh_type = SHT_STRTAB;
- shstrtab_hdr->sh_flags = 0;
- shstrtab_hdr->sh_addr = 0;
- shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
- shstrtab_hdr->sh_entsize = 0;
- shstrtab_hdr->sh_link = 0;
- shstrtab_hdr->sh_info = 0;
- /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */
- shstrtab_hdr->sh_addralign = 1;
-
- if (!assign_file_positions_except_relocs (abfd,
- link_info == NULL ? true : false))
- return false;
-
- if (link_info == NULL)
- {
- /* Now that we know where the .strtab section goes, write it
- out. */
- if ((bfd_seek (abfd, elf_tdata (abfd)->strtab_hdr.sh_offset, SEEK_SET)
- != 0)
- || ! _bfd_stringtab_emit (abfd, strtab))
- return false;
- _bfd_stringtab_free (strtab);
- }
-
- abfd->output_has_begun = true;
-
- return true;
-}
-
-
-/* Align to the maximum file alignment that could be required for any
- ELF data structure. */
-
-static INLINE file_ptr
-align_file_position (off)
- file_ptr off;
-{
- return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
-}
-
-/* Assign a file position to a section, optionally aligning to the
- required section alignment. */
-
-static INLINE file_ptr
-assign_file_position_for_section (i_shdrp, offset, align)
- Elf_Internal_Shdr *i_shdrp;
- file_ptr offset;
- boolean align;
-{
- if (align)
- {
- unsigned int al;
-
- al = i_shdrp->sh_addralign;
- if (al > 1)
- offset = BFD_ALIGN (offset, al);
- }
- i_shdrp->sh_offset = offset;
- if (i_shdrp->bfd_section != NULL)
- i_shdrp->bfd_section->filepos = offset;
- if (i_shdrp->sh_type != SHT_NOBITS)
- offset += i_shdrp->sh_size;
- return offset;
-}
-
-/* Get the size of the program header. This is called by the linker
- before any of the section VMA's are set, so it can't calculate the
- correct value for a strange memory layout. */
-
-static bfd_size_type
-get_program_header_size (abfd)
- bfd *abfd;
-{
- size_t segs;
- asection *s;
-
- /* Assume we will need exactly two PT_LOAD segments: one for text
- and one for data. */
- segs = 2;
-
- s = bfd_get_section_by_name (abfd, ".interp");
- if (s != NULL && (s->flags & SEC_LOAD) != 0)
- {
- /* If we have a loadable interpreter section, we need a
- PT_INTERP segment. In this case, assume we also need a
- PT_PHDR segment, although that may not be true for all
- targets. */
- segs += 2;
- }
-
- if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
- {
- /* We need a PT_DYNAMIC segment. */
- ++segs;
- }
-
- return segs * sizeof (Elf_External_Phdr);
-}
-
-/* Create the program header. OFF is the file offset where the
- program header should be written. FIRST is the first loadable ELF
- section. PHDR_SIZE is the size of the program header as returned
- by get_program_header_size. */
-
-static file_ptr
-map_program_segments (abfd, off, first, phdr_size)
- bfd *abfd;
- file_ptr off;
- Elf_Internal_Shdr *first;
- bfd_size_type phdr_size;
-{
- Elf_Internal_Phdr phdrs[10];
- unsigned int phdr_count;
- Elf_Internal_Phdr *phdr;
- int phdr_size_adjust;
- unsigned int i;
- Elf_Internal_Shdr **hdrpp;
- asection *sinterp, *sdyn;
- unsigned int last_type;
- Elf_Internal_Ehdr *i_ehdrp;
-
- BFD_ASSERT ((abfd->flags & (EXEC_P | DYNAMIC)) != 0);
- BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr)
- <= sizeof phdrs / sizeof (phdrs[0]));
-
- phdr_count = 0;
- phdr = phdrs;
-
- phdr_size_adjust = 0;
-
- /* If we have a loadable .interp section, we must create a PT_INTERP
- segment which must precede all PT_LOAD segments. We assume that
- we must also create a PT_PHDR segment, although that may not be
- true for all targets. */
- sinterp = bfd_get_section_by_name (abfd, ".interp");
- if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0)
- {
- BFD_ASSERT (first != NULL);
-
- phdr->p_type = PT_PHDR;
-
- phdr->p_offset = off;
-
- /* Account for any adjustment made because of the alignment of
- the first loadable section. */
- phdr_size_adjust = (first->sh_offset - phdr_size) - off;
- BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128);
-
- /* The program header precedes all loadable sections. This lets
- us compute its loadable address. This depends on the linker
- script. */
- phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust);
-
- phdr->p_paddr = 0;
- phdr->p_filesz = phdr_size;
- phdr->p_memsz = phdr_size;
-
- /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
- phdr->p_flags = PF_R | PF_X;
-
- phdr->p_align = FILE_ALIGN;
- BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0);
-
- /* Include the ELF header in the first loadable segment. */
- phdr_size_adjust += off;
-
- ++phdr_count;
- ++phdr;
-
- phdr->p_type = PT_INTERP;
- phdr->p_offset = sinterp->filepos;
- phdr->p_vaddr = sinterp->vma;
- phdr->p_paddr = 0;
- phdr->p_filesz = sinterp->_raw_size;
- phdr->p_memsz = sinterp->_raw_size;
- phdr->p_flags = PF_R;
- phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp);
-
- ++phdr_count;
- ++phdr;
- }
-
- /* Look through the sections to see how they will be divided into
- program segments. The sections must be arranged in order by
- sh_addr for this to work correctly. */
- phdr->p_type = PT_NULL;
- last_type = SHT_PROGBITS;
- for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
- i < elf_elfheader (abfd)->e_shnum;
- i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
-
- /* Ignore any section which will not be part of the process
- image. */
- if ((hdr->sh_flags & SHF_ALLOC) == 0)
- continue;
-
- /* If this section fits in the segment we are constructing, add
- it in. */
- if (phdr->p_type != PT_NULL
- && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz)
- == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz))
- && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
- {
- bfd_size_type adjust;
-
- adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz);
- phdr->p_memsz += hdr->sh_size + adjust;
- if (hdr->sh_type != SHT_NOBITS)
- phdr->p_filesz += hdr->sh_size + adjust;
- if ((hdr->sh_flags & SHF_WRITE) != 0)
- phdr->p_flags |= PF_W;
- if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
- phdr->p_flags |= PF_X;
- last_type = hdr->sh_type;
- continue;
- }
-
- /* If we have a segment, move to the next one. */
- if (phdr->p_type != PT_NULL)
- {
- ++phdr;
- ++phdr_count;
- }
-
- /* Start a new segment. */
- phdr->p_type = PT_LOAD;
- phdr->p_offset = hdr->sh_offset;
- phdr->p_vaddr = hdr->sh_addr;
- phdr->p_paddr = 0;
- if (hdr->sh_type == SHT_NOBITS)
- phdr->p_filesz = 0;
- else
- phdr->p_filesz = hdr->sh_size;
- phdr->p_memsz = hdr->sh_size;
- phdr->p_flags = PF_R;
- if ((hdr->sh_flags & SHF_WRITE) != 0)
- phdr->p_flags |= PF_W;
- if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
- phdr->p_flags |= PF_X;
- phdr->p_align = get_elf_backend_data (abfd)->maxpagesize;
-
- if (hdr == first
- && sinterp != NULL
- && (sinterp->flags & SEC_LOAD) != 0)
- {
- phdr->p_offset -= phdr_size + phdr_size_adjust;
- phdr->p_vaddr -= phdr_size + phdr_size_adjust;
- phdr->p_filesz += phdr_size + phdr_size_adjust;
- phdr->p_memsz += phdr_size + phdr_size_adjust;
- }
-
- last_type = hdr->sh_type;
- }
-
- if (phdr->p_type != PT_NULL)
- {
- ++phdr;
- ++phdr_count;
- }
-
- /* If we have a .dynamic section, create a PT_DYNAMIC segment. */
- sdyn = bfd_get_section_by_name (abfd, ".dynamic");
- if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0)
- {
- phdr->p_type = PT_DYNAMIC;
- phdr->p_offset = sdyn->filepos;
- phdr->p_vaddr = sdyn->vma;
- phdr->p_paddr = 0;
- phdr->p_filesz = sdyn->_raw_size;
- phdr->p_memsz = sdyn->_raw_size;
- phdr->p_flags = PF_R;
- if ((sdyn->flags & SEC_READONLY) == 0)
- phdr->p_flags |= PF_W;
- if ((sdyn->flags & SEC_CODE) != 0)
- phdr->p_flags |= PF_X;
- phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn);
-
- ++phdr;
- ++phdr_count;
- }
-
- /* Make sure the return value from get_program_header_size matches
- what we computed here. Actually, it's OK if we allocated too
- much space in the program header. */
- if (phdr_count > phdr_size / sizeof (Elf_External_Phdr))
- abort ();
-
- /* Set up program header information. */
- i_ehdrp = elf_elfheader (abfd);
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
- i_ehdrp->e_phoff = off;
- i_ehdrp->e_phnum = phdr_count;
-
- /* Save the program headers away. I don't think anybody uses this
- information right now. */
- elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *)
- bfd_alloc (abfd,
- (phdr_count
- * sizeof (Elf_Internal_Phdr))));
- if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return (file_ptr) -1;
- }
- memcpy (elf_tdata (abfd)->phdr, phdrs,
- phdr_count * sizeof (Elf_Internal_Phdr));
-
- /* Write out the program headers. */
- if (bfd_seek (abfd, off, SEEK_SET) != 0)
- return (file_ptr) -1;
-
- for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++)
- {
- Elf_External_Phdr extphdr;
-
- elf_swap_phdr_out (abfd, phdr, &extphdr);
- if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd)
- != sizeof (Elf_External_Phdr))
- return (file_ptr) -1;
- }
-
- return off + phdr_count * sizeof (Elf_External_Phdr);
-}
-
-/* Work out the file positions of all the sections. This is called by
- elf_compute_section_file_positions. All the section sizes and VMAs
- must be known before this is called.
-
- We do not consider reloc sections at this point, unless they form
- part of the loadable image. Reloc sections are assigned file
- positions in assign_file_positions_for_relocs, which is called by
- write_object_contents and final_link.
-
- If DOSYMS is false, we do not assign file positions for the symbol
- table or the string table. */
-
-static boolean
-assign_file_positions_except_relocs (abfd, dosyms)
- bfd *abfd;
- boolean dosyms;
-{
- struct elf_obj_tdata * const tdata = elf_tdata (abfd);
- Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
- Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
- file_ptr off;
-
- /* Start after the ELF header. */
- off = i_ehdrp->e_ehsize;
-
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- {
- Elf_Internal_Shdr **hdrpp;
- unsigned int i;
-
- /* We are not creating an executable, which means that we are
- not creating a program header, and that the actual order of
- the sections in the file is unimportant. */
- for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
- if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
- {
- hdr->sh_offset = -1;
- continue;
- }
- if (! dosyms
- && (i == tdata->symtab_section
- || i == tdata->strtab_section))
- {
- hdr->sh_offset = -1;
- continue;
- }
-
- off = assign_file_position_for_section (hdr, off, true);
- }
- }
- else
- {
- file_ptr phdr_off;
- bfd_size_type phdr_size;
- bfd_vma maxpagesize;
- Elf_Internal_Shdr **hdrpp;
- unsigned int i;
- Elf_Internal_Shdr *first;
- file_ptr phdr_map;
-
- /* We are creating an executable. We must create a program
- header. We can't actually create the program header until we
- have set the file positions for the sections, but we can
- figure out how big it is going to be. */
- off = align_file_position (off);
- phdr_size = get_program_header_size (abfd);
- if (phdr_size == (file_ptr) -1)
- return false;
- phdr_off = off;
- off += phdr_size;
-
- maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
- if (maxpagesize == 0)
- maxpagesize = 1;
-
- /* FIXME: We might want to sort the sections on the sh_addr
- field here. For now, we just assume that the linker will
- create the sections in an appropriate order. */
-
- /* Assign file positions in two passes. In the first pass, we
- assign a file position to every section which forms part of
- the executable image. */
- first = NULL;
- for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
- if ((hdr->sh_flags & SHF_ALLOC) == 0)
- continue;
-
- if (first == NULL)
- first = hdr;
-
- /* The section VMA must equal the file position modulo the
- page size. This is required by the program header. */
- off += (hdr->sh_addr - off) % maxpagesize;
-
- off = assign_file_position_for_section (hdr, off, false);
- }
-
- /* Assign file positions to all the sections which do not form
- part of the loadable image, except for the relocs. */
- for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
- if ((hdr->sh_flags & SHF_ALLOC) != 0)
- continue;
- if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
- {
- hdr->sh_offset = -1;
- continue;
- }
- if (! dosyms
- && (i == tdata->symtab_section
- || i == tdata->strtab_section))
- {
- hdr->sh_offset = -1;
- continue;
- }
-
- off = assign_file_position_for_section (hdr, off, true);
- }
-
- phdr_map = map_program_segments (abfd, phdr_off, first, phdr_size);
- if (phdr_map == (file_ptr) -1)
- return false;
- BFD_ASSERT (phdr_map <= phdr_off + phdr_size);
- }
-
- /* Place the section headers. */
- off = align_file_position (off);
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
-
- elf_tdata (abfd)->next_file_pos = off;
-
- return true;
-}
-
-static boolean
-prep_headers (abfd)
- bfd *abfd;
-{
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
- Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
- int count;
- struct bfd_strtab_hash *shstrtab;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- shstrtab = elf_stringtab_init ();
- if (shstrtab == NULL)
- return false;
-
- elf_shstrtab (abfd) = shstrtab;
-
- i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
- i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
- i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
- i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
-
- i_ehdrp->e_ident[EI_CLASS] = ELFCLASS;
- i_ehdrp->e_ident[EI_DATA] =
- abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
- i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT;
-
- for (count = EI_PAD; count < EI_NIDENT; count++)
- i_ehdrp->e_ident[count] = 0;
-
- if ((abfd->flags & DYNAMIC) != 0)
- i_ehdrp->e_type = ET_DYN;
- else if ((abfd->flags & EXEC_P) != 0)
- i_ehdrp->e_type = ET_EXEC;
- else
- i_ehdrp->e_type = ET_REL;
-
- switch (bfd_get_arch (abfd))
- {
- case bfd_arch_unknown:
- i_ehdrp->e_machine = EM_NONE;
- break;
- case bfd_arch_sparc:
-#if ARCH_SIZE == 64
- i_ehdrp->e_machine = EM_SPARC64;
-#else
- i_ehdrp->e_machine = EM_SPARC;
-#endif
- break;
- case bfd_arch_i386:
- i_ehdrp->e_machine = EM_386;
- break;
- case bfd_arch_m68k:
- i_ehdrp->e_machine = EM_68K;
- break;
- case bfd_arch_m88k:
- i_ehdrp->e_machine = EM_88K;
- break;
- case bfd_arch_i860:
- i_ehdrp->e_machine = EM_860;
- break;
- case bfd_arch_mips: /* MIPS Rxxxx */
- i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
- break;
- case bfd_arch_hppa:
- i_ehdrp->e_machine = EM_PARISC;
- break;
- case bfd_arch_powerpc:
- i_ehdrp->e_machine = EM_CYGNUS_POWERPC;
- break;
- /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
- default:
- i_ehdrp->e_machine = EM_NONE;
- }
- i_ehdrp->e_version = EV_CURRENT;
- i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr);
-
- /* no program header, for now. */
- i_ehdrp->e_phoff = 0;
- i_ehdrp->e_phentsize = 0;
- i_ehdrp->e_phnum = 0;
-
- /* each bfd section is section header entry */
- i_ehdrp->e_entry = bfd_get_start_address (abfd);
- i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr);
-
- /* if we're building an executable, we'll need a program header table */
- if (abfd->flags & EXEC_P)
- {
- /* it all happens later */
-#if 0
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
-
- /* elf_build_phdrs() returns a (NULL-terminated) array of
- Elf_Internal_Phdrs */
- i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
- i_ehdrp->e_phoff = outbase;
- outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
-#endif
- }
- else
- {
- i_ehdrp->e_phentsize = 0;
- i_phdrp = 0;
- i_ehdrp->e_phoff = 0;
- }
-
- elf_tdata (abfd)->symtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
- elf_tdata (abfd)->strtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
- elf_tdata (abfd)->shstrtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
- if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
- || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
- || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
- return false;
-
- return true;
-}
-
-static boolean
-swap_out_syms (abfd, sttp)
- bfd *abfd;
- struct bfd_strtab_hash **sttp;
-{
- if (!elf_map_symbols (abfd))
- return false;
-
- /* Dump out the symtabs. */
- {
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- struct bfd_strtab_hash *stt;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- Elf_External_Sym *outbound_syms;
- int idx;
-
- stt = elf_stringtab_init ();
- if (stt == NULL)
- return false;
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
- symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
- symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
- symtab_hdr->sh_addralign = FILE_ALIGN;
-
- symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
- symstrtab_hdr->sh_type = SHT_STRTAB;
-
- outbound_syms = ((Elf_External_Sym *)
- bfd_alloc (abfd,
- (1 + symcount) * sizeof (Elf_External_Sym)));
- if (outbound_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- symtab_hdr->contents = (PTR) outbound_syms;
-
- /* now generate the data (for "contents") */
- {
- /* Fill in zeroth symbol and swap it out. */
- Elf_Internal_Sym sym;
- sym.st_name = 0;
- sym.st_value = 0;
- sym.st_size = 0;
- sym.st_info = 0;
- sym.st_other = 0;
- sym.st_shndx = SHN_UNDEF;
- elf_swap_symbol_out (abfd, &sym, outbound_syms);
- ++outbound_syms;
- }
- for (idx = 0; idx < symcount; idx++)
- {
- Elf_Internal_Sym sym;
- bfd_vma value = syms[idx]->value;
- elf_symbol_type *type_ptr;
-
- if (syms[idx]->flags & BSF_SECTION_SYM)
- /* Section symbols have no names. */
- sym.st_name = 0;
- else
- {
- sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
- syms[idx]->name,
- true, false);
- if (sym.st_name == (unsigned long) -1)
- return false;
- }
-
- type_ptr = elf_symbol_from (abfd, syms[idx]);
-
- if (bfd_is_com_section (syms[idx]->section))
- {
- /* ELF common symbols put the alignment into the `value' field,
- and the size into the `size' field. This is backwards from
- how BFD handles it, so reverse it here. */
- sym.st_size = value;
- if (type_ptr == NULL
- || type_ptr->internal_elf_sym.st_value == 0)
- sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
- else
- sym.st_value = type_ptr->internal_elf_sym.st_value;
- sym.st_shndx = elf_section_from_bfd_section (abfd,
- syms[idx]->section);
- }
- else
- {
- asection *sec = syms[idx]->section;
- int shndx;
-
- if (sec->output_section)
- {
- value += sec->output_offset;
- sec = sec->output_section;
- }
- value += sec->vma;
- sym.st_value = value;
- sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
- sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec);
- if (shndx == -1)
- {
- asection *sec2;
- /* Writing this would be a hell of a lot easier if we had
- some decent documentation on bfd, and knew what to expect
- of the library, and what to demand of applications. For
- example, it appears that `objcopy' might not set the
- section of a symbol to be a section that is actually in
- the output file. */
- sec2 = bfd_get_section_by_name (abfd, sec->name);
- BFD_ASSERT (sec2 != 0);
- sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2);
- BFD_ASSERT (shndx != -1);
- }
- }
-
- if (bfd_is_com_section (syms[idx]->section))
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
- else if (bfd_is_und_section (syms[idx]->section))
- sym.st_info = ELF_ST_INFO (STB_GLOBAL,
- ((syms[idx]->flags & BSF_FUNCTION)
- ? STT_FUNC
- : STT_NOTYPE));
- else if (syms[idx]->flags & BSF_SECTION_SYM)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- else if (syms[idx]->flags & BSF_FILE)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- else
- {
- int bind = STB_LOCAL;
- int type = STT_OBJECT;
- unsigned int flags = syms[idx]->flags;
-
- if (flags & BSF_LOCAL)
- bind = STB_LOCAL;
- else if (flags & BSF_WEAK)
- bind = STB_WEAK;
- else if (flags & BSF_GLOBAL)
- bind = STB_GLOBAL;
-
- if (flags & BSF_FUNCTION)
- type = STT_FUNC;
-
- sym.st_info = ELF_ST_INFO (bind, type);
- }
-
- sym.st_other = 0;
- elf_swap_symbol_out (abfd, &sym, outbound_syms);
- ++outbound_syms;
- }
-
- *sttp = stt;
- symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
- symstrtab_hdr->sh_type = SHT_STRTAB;
-
- symstrtab_hdr->sh_flags = 0;
- symstrtab_hdr->sh_addr = 0;
- symstrtab_hdr->sh_entsize = 0;
- symstrtab_hdr->sh_link = 0;
- symstrtab_hdr->sh_info = 0;
- symstrtab_hdr->sh_addralign = 1;
- }
-
- return true;
-}
-
-static boolean
-write_shdrs_and_ehdr (abfd)
- bfd *abfd;
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Shdr *x_shdrp; /* Section header table, external form */
- Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
- unsigned int count;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- /* swap the header before spitting it out... */
-
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
- elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
- if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
- || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd)
- != sizeof (x_ehdr)))
- return false;
-
- /* at this point we've concocted all the ELF sections... */
- x_shdrp = (Elf_External_Shdr *)
- bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
- if (!x_shdrp)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (count = 0; count < i_ehdrp->e_shnum; count++)
- {
-#if DEBUG & 2
- elf_debug_section (count, i_shdrp[count]);
-#endif
- elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
- }
- if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
- || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd)
- != sizeof (*x_shdrp) * i_ehdrp->e_shnum))
- return false;
-
- /* need to dump the string table too... */
-
- return true;
-}
-
-/* Assign file positions for all the reloc sections which are not part
- of the loadable file image. */
-
-static void
-assign_file_positions_for_relocs (abfd)
- bfd *abfd;
-{
- file_ptr off;
- unsigned int i;
- Elf_Internal_Shdr **shdrpp;
-
- off = elf_tdata (abfd)->next_file_pos;
-
- for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
- i < elf_elfheader (abfd)->e_shnum;
- i++, shdrpp++)
- {
- Elf_Internal_Shdr *shdrp;
-
- shdrp = *shdrpp;
- if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
- && shdrp->sh_offset == -1)
- off = assign_file_position_for_section (shdrp, off, true);
- }
-
- elf_tdata (abfd)->next_file_pos = off;
-}
-
-boolean
-NAME(bfd_elf,write_object_contents) (abfd)
- bfd *abfd;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- Elf_Internal_Ehdr *i_ehdrp;
- Elf_Internal_Shdr **i_shdrp;
- unsigned int count;
-
- if (! abfd->output_has_begun
- && ! elf_compute_section_file_positions (abfd,
- (struct bfd_link_info *) NULL))
- return false;
-
- i_shdrp = elf_elfsections (abfd);
- i_ehdrp = elf_elfheader (abfd);
-
- bfd_map_over_sections (abfd, write_relocs, (PTR) 0);
- assign_file_positions_for_relocs (abfd);
-
- /* After writing the headers, we need to write the sections too... */
- for (count = 1; count < i_ehdrp->e_shnum; count++)
- {
- if (bed->elf_backend_section_processing)
- (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
- if (i_shdrp[count]->contents)
- {
- if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
- || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
- 1, abfd)
- != i_shdrp[count]->sh_size))
- return false;
- }
- }
-
- /* Write out the section header names. */
- if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
- return false;
-
- if (bed->elf_backend_final_write_processing)
- (*bed->elf_backend_final_write_processing) (abfd,
- elf_tdata (abfd)->linker);
-
- return write_shdrs_and_ehdr (abfd);
-}
-
-/* Given an ELF section number, retrieve the corresponding BFD
- section. */
-
-static asection *
-section_from_elf_index (abfd, index)
- bfd *abfd;
- unsigned int index;
-{
- BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
- if (index >= elf_elfheader (abfd)->e_shnum)
- return NULL;
- return elf_elfsections (abfd)[index]->bfd_section;
-}
-
-/* given a section, search the header to find them... */
-static int
-elf_section_from_bfd_section (abfd, asect)
- bfd *abfd;
- struct sec *asect;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
- int index;
- Elf_Internal_Shdr *hdr;
- int maxindex = elf_elfheader (abfd)->e_shnum;
-
- if (bfd_is_abs_section (asect))
- return SHN_ABS;
- if (bfd_is_com_section (asect))
- return SHN_COMMON;
- if (bfd_is_und_section (asect))
- return SHN_UNDEF;
-
- for (index = 0; index < maxindex; index++)
- {
- hdr = i_shdrp[index];
- if (hdr->bfd_section == asect)
- return index;
- }
-
- if (bed->elf_backend_section_from_bfd_section)
- {
- for (index = 0; index < maxindex; index++)
- {
- int retval;
-
- hdr = i_shdrp[index];
- retval = index;
- if ((*bed->elf_backend_section_from_bfd_section)
- (abfd, hdr, asect, &retval))
- return retval;
- }
- }
-
- return -1;
-}
-
-/* given a symbol, return the bfd index for that symbol. */
-static int
-elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
- bfd *abfd;
- struct symbol_cache_entry **asym_ptr_ptr;
-{
- struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr;
- int idx;
- flagword flags = asym_ptr->flags;
-
- /* When gas creates relocations against local labels, it creates its
- own symbol for the section, but does put the symbol into the
- symbol chain, so udata is 0. When the linker is generating
- relocatable output, this section symbol may be for one of the
- input sections rather than the output section. */
- if (asym_ptr->udata.i == 0
- && (flags & BSF_SECTION_SYM)
- && asym_ptr->section)
- {
- int indx;
-
- if (asym_ptr->section->output_section != NULL)
- indx = asym_ptr->section->output_section->index;
- else
- indx = asym_ptr->section->index;
- if (elf_section_syms (abfd)[indx])
- asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
- }
-
- idx = asym_ptr->udata.i;
- if (idx == 0)
- abort ();
-
-#if DEBUG & 4
- {
-
- fprintf (stderr,
- "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx %s\n",
- (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags));
- fflush (stderr);
- }
-#endif
-
- return idx;
-}
-
-static long
-elf_slurp_symbol_table (abfd, symptrs, dynamic)
- bfd *abfd;
- asymbol **symptrs; /* Buffer for generated bfd symbols */
- boolean dynamic;
-{
- Elf_Internal_Shdr *hdr;
- long symcount; /* Number of external ELF symbols */
- elf_symbol_type *sym; /* Pointer to current bfd symbol */
- elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
- Elf_Internal_Sym i_sym;
- Elf_External_Sym *x_symp = NULL;
-
- /* Read each raw ELF symbol, converting from external ELF form to
- internal ELF form, and then using the information to create a
- canonical bfd symbol table entry.
-
- Note that we allocate the initial bfd canonical symbol buffer
- based on a one-to-one mapping of the ELF symbols to canonical
- symbols. We actually use all the ELF symbols, so there will be no
- space left over at the end. When we have all the symbols, we
- build the caller's pointer vector. */
-
- if (dynamic)
- hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- else
- hdr = &elf_tdata (abfd)->symtab_hdr;
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
- return -1;
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- if (symcount == 0)
- sym = symbase = NULL;
- else
- {
- long i;
-
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
- return -1;
-
- symbase = ((elf_symbol_type *)
- bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
- if (symbase == (elf_symbol_type *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return -1;
- }
- sym = symbase;
-
- /* Temporarily allocate room for the raw ELF symbols. */
- x_symp = ((Elf_External_Sym *)
- malloc (symcount * sizeof (Elf_External_Sym)));
- if (x_symp == NULL && symcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
- != symcount * sizeof (Elf_External_Sym))
- goto error_return;
- /* Skip first symbol, which is a null dummy. */
- for (i = 1; i < symcount; i++)
- {
- elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
- memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
-#ifdef ELF_KEEP_EXTSYM
- memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
-#endif
- sym->symbol.the_bfd = abfd;
-
- sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
- i_sym.st_name);
-
- sym->symbol.value = i_sym.st_value;
-
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE)
- {
- sym->symbol.section = section_from_elf_index (abfd,
- i_sym.st_shndx);
- if (sym->symbol.section == NULL)
- {
- /* This symbol is in a section for which we did not
- create a BFD section. Just use bfd_abs_section,
- although it is wrong. FIXME. */
- sym->symbol.section = bfd_abs_section_ptr;
- }
- }
- else if (i_sym.st_shndx == SHN_ABS)
- {
- sym->symbol.section = bfd_abs_section_ptr;
- }
- else if (i_sym.st_shndx == SHN_COMMON)
- {
- sym->symbol.section = bfd_com_section_ptr;
- /* Elf puts the alignment into the `value' field, and
- the size into the `size' field. BFD wants to see the
- size in the value field, and doesn't care (at the
- moment) about the alignment. */
- sym->symbol.value = i_sym.st_size;
- }
- else if (i_sym.st_shndx == SHN_UNDEF)
- {
- sym->symbol.section = bfd_und_section_ptr;
- }
- else
- sym->symbol.section = bfd_abs_section_ptr;
-
- sym->symbol.value -= sym->symbol.section->vma;
-
- switch (ELF_ST_BIND (i_sym.st_info))
- {
- case STB_LOCAL:
- sym->symbol.flags |= BSF_LOCAL;
- break;
- case STB_GLOBAL:
- sym->symbol.flags |= BSF_GLOBAL;
- break;
- case STB_WEAK:
- sym->symbol.flags |= BSF_WEAK;
- break;
- }
-
- switch (ELF_ST_TYPE (i_sym.st_info))
- {
- case STT_SECTION:
- sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
- break;
- case STT_FILE:
- sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
- break;
- case STT_FUNC:
- sym->symbol.flags |= BSF_FUNCTION;
- break;
- }
-
- if (dynamic)
- sym->symbol.flags |= BSF_DYNAMIC;
-
- /* Do some backend-specific processing on this symbol. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_processing)
- (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
- }
-
- sym++;
- }
- }
-
- /* Do some backend-specific processing on this symbol table. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_table_processing)
- (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
- }
-
- /* We rely on the zalloc to clear out the final symbol entry. */
-
- symcount = sym - symbase;
-
- /* Fill in the user's symbol pointer vector if needed. */
- if (symptrs)
- {
- long l = symcount;
-
- sym = symbase;
- while (l-- > 0)
- {
- *symptrs++ = &sym->symbol;
- sym++;
- }
- *symptrs = 0; /* Final null pointer */
- }
-
- if (x_symp != NULL)
- free (x_symp);
- return symcount;
-error_return:
- if (x_symp != NULL)
- free (x_symp);
- return -1;
-}
-
-/* Return the number of bytes required to hold the symtab vector.
-
- Note that we base it on the count plus 1, since we will null terminate
- the vector allocated based on this size. However, the ELF symbol table
- always has a dummy entry as symbol #0, so it ends up even. */
-
-long
-elf_get_symtab_upper_bound (abfd)
- bfd *abfd;
-{
- long symcount;
- long symtab_size;
- Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
-
- return symtab_size;
-}
-
-long
-elf_get_dynamic_symtab_upper_bound (abfd)
- bfd *abfd;
-{
- long symcount;
- long symtab_size;
- Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
-
- if (elf_dynsymtab (abfd) == 0)
- {
- bfd_set_error (bfd_error_invalid_operation);
- return -1;
- }
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
-
- return symtab_size;
-}
-
-long
-elf_get_reloc_upper_bound (abfd, asect)
- bfd *abfd;
- sec_ptr asect;
-{
- return (asect->reloc_count + 1) * sizeof (arelent *);
-}
-
-/* Read in and swap the external relocs. */
-
-static boolean
-elf_slurp_reloc_table (abfd, asect, symbols)
- bfd *abfd;
- asection *asect;
- asymbol **symbols;
-{
- struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
- struct bfd_elf_section_data * const d = elf_section_data (asect);
- PTR allocated = NULL;
- bfd_byte *native_relocs;
- arelent *relents;
- arelent *relent;
- unsigned int i;
- int entsize;
-
- if (asect->relocation != NULL
- || (asect->flags & SEC_RELOC) == 0
- || asect->reloc_count == 0)
- return true;
-
- BFD_ASSERT (asect->rel_filepos == d->rel_hdr.sh_offset
- && (asect->reloc_count
- == d->rel_hdr.sh_size / d->rel_hdr.sh_entsize));
-
- allocated = (PTR) malloc (d->rel_hdr.sh_size);
- if (allocated == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0
- || (bfd_read (allocated, 1, d->rel_hdr.sh_size, abfd)
- != d->rel_hdr.sh_size))
- goto error_return;
-
- native_relocs = (bfd_byte *) allocated;
-
- relents = ((arelent *)
- bfd_alloc (abfd, asect->reloc_count * sizeof (arelent)));
- if (relents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- entsize = d->rel_hdr.sh_entsize;
- BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
- || entsize == sizeof (Elf_External_Rela));
-
- for (i = 0, relent = relents;
- i < asect->reloc_count;
- i++, relent++, native_relocs += entsize)
- {
- Elf_Internal_Rela rela;
- Elf_Internal_Rel rel;
-
- if (entsize == sizeof (Elf_External_Rela))
- elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
- else
- {
- elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
- rela.r_offset = rel.r_offset;
- rela.r_info = rel.r_info;
- rela.r_addend = 0;
- }
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a BFD reloc is always section relative. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- relent->address = rela.r_offset;
- else
- relent->address = rela.r_offset - asect->vma;
-
- if (ELF_R_SYM (rela.r_info) == 0)
- relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- else
- {
- asymbol **ps, *s;
-
- ps = symbols + ELF_R_SYM (rela.r_info) - 1;
- s = *ps;
-
- /* Canonicalize ELF section symbols. FIXME: Why? */
- if ((s->flags & BSF_SECTION_SYM) == 0)
- relent->sym_ptr_ptr = ps;
- else
- relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
- }
-
- relent->addend = rela.r_addend;
-
- if (entsize == sizeof (Elf_External_Rela))
- (*ebd->elf_info_to_howto) (abfd, relent, &rela);
- else
- (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
- }
-
- asect->relocation = relents;
-
- if (allocated != NULL)
- free (allocated);
-
- return true;
-
- error_return:
- if (allocated != NULL)
- free (allocated);
- return false;
-}
-
-#ifdef DEBUG
-static void
-elf_debug_section (num, hdr)
- int num;
- Elf_Internal_Shdr *hdr;
-{
- fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
- hdr->bfd_section != NULL ? hfd->bfd_section->name : "",
- (long) hdr);
- fprintf (stderr,
- "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
- (long) hdr->sh_name,
- (long) hdr->sh_type,
- (long) hdr->sh_flags);
- fprintf (stderr,
- "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
- (long) hdr->sh_addr,
- (long) hdr->sh_offset,
- (long) hdr->sh_size);
- fprintf (stderr,
- "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
- (long) hdr->sh_link,
- (long) hdr->sh_info,
- (long) hdr->sh_addralign);
- fprintf (stderr, "sh_entsize = %ld\n",
- (long) hdr->sh_entsize);
- fflush (stderr);
-}
-
-static void
-elf_debug_file (ehdrp)
- Elf_Internal_Ehdr *ehdrp;
-{
- fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
- fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
- fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
- fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
- fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
- fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
- fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
-}
-#endif
-
-/* Canonicalize the relocs. */
-
-long
-elf_canonicalize_reloc (abfd, section, relptr, symbols)
- bfd *abfd;
- sec_ptr section;
- arelent **relptr;
- asymbol **symbols;
-{
- arelent *tblptr;
- unsigned int i;
-
- if (! elf_slurp_reloc_table (abfd, section, symbols))
- return -1;
-
- tblptr = section->relocation;
- for (i = 0; i < section->reloc_count; i++)
- *relptr++ = tblptr++;
-
- *relptr = NULL;
-
- return section->reloc_count;
-}
-
-long
-elf_get_symtab (abfd, alocation)
- bfd *abfd;
- asymbol **alocation;
-{
- long symcount = elf_slurp_symbol_table (abfd, alocation, false);
-
- if (symcount >= 0)
- bfd_get_symcount (abfd) = symcount;
- return symcount;
-}
-
-long
-elf_canonicalize_dynamic_symtab (abfd, alocation)
- bfd *abfd;
- asymbol **alocation;
-{
- return elf_slurp_symbol_table (abfd, alocation, true);
-}
-
-asymbol *
-elf_make_empty_symbol (abfd)
- bfd *abfd;
-{
- elf_symbol_type *newsym;
-
- newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
- if (!newsym)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- else
- {
- newsym->symbol.the_bfd = abfd;
- return &newsym->symbol;
- }
-}
-
-void
-elf_get_symbol_info (ignore_abfd, symbol, ret)
- bfd *ignore_abfd;
- asymbol *symbol;
- symbol_info *ret;
-{
- bfd_symbol_info (symbol, ret);
-}
-
-alent *
-elf_get_lineno (ignore_abfd, symbol)
- bfd *ignore_abfd;
- asymbol *symbol;
-{
- fprintf (stderr, "elf_get_lineno unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
- return NULL;
-}
-
-boolean
-elf_set_arch_mach (abfd, arch, machine)
- bfd *abfd;
- enum bfd_architecture arch;
- unsigned long machine;
-{
- /* If this isn't the right architecture for this backend, and this
- isn't the generic backend, fail. */
- if (arch != get_elf_backend_data (abfd)->arch
- && arch != bfd_arch_unknown
- && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
- return false;
-
- return bfd_default_set_arch_mach (abfd, arch, machine);
-}
-
-boolean
-elf_find_nearest_line (abfd,
- section,
- symbols,
- offset,
- filename_ptr,
- functionname_ptr,
- line_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- CONST char **filename_ptr;
- CONST char **functionname_ptr;
- unsigned int *line_ptr;
-{
- return false;
-}
-
-int
-elf_sizeof_headers (abfd, reloc)
- bfd *abfd;
- boolean reloc;
-{
- int ret;
-
- ret = sizeof (Elf_External_Ehdr);
- if (! reloc)
- ret += get_program_header_size (abfd);
- return ret;
-}
-
-boolean
-elf_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
-{
- Elf_Internal_Shdr *hdr;
-
- if (! abfd->output_has_begun
- && ! elf_compute_section_file_positions (abfd,
- (struct bfd_link_info *) NULL))
- return false;
-
- hdr = &elf_section_data (section)->this_hdr;
-
- if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
- return false;
- if (bfd_write (location, 1, count, abfd) != count)
- return false;
-
- return true;
-}
-
-void
-elf_no_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
-{
- fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
-}
-
-void
-elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf_Internal_Rel *dst;
-{
- fprintf (stderr, "elf REL relocation support for target machine unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
-}
-\f
-
-/* Core file support */
-
-#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
-#include <sys/procfs.h>
-#else
-#define bfd_prstatus(abfd, descdata, descsz, filepos) true
-#define bfd_fpregset(abfd, descdata, descsz, filepos) true
-#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true
-#endif
-
-#ifdef HAVE_PROCFS
-
-static boolean
-bfd_prstatus (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- asection *newsect;
- prstatus_t *status = (prstatus_t *) 0;
-
- if (descsz == sizeof (prstatus_t))
- {
- newsect = bfd_make_section (abfd, ".reg");
- if (newsect == NULL)
- return false;
- newsect->_raw_size = sizeof (status->pr_reg);
- newsect->filepos = filepos + (long) &status->pr_reg;
- newsect->flags = SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
- {
- memcpy (core_prstatus (abfd), descdata, descsz);
- }
- }
- return true;
-}
-
-/* Stash a copy of the prpsinfo structure away for future use. */
-
-static boolean
-bfd_prpsinfo (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- if (descsz == sizeof (prpsinfo_t))
- {
- if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- memcpy (core_prpsinfo (abfd), descdata, descsz);
- }
- return true;
-}
-
-static boolean
-bfd_fpregset (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- asection *newsect;
-
- newsect = bfd_make_section (abfd, ".reg2");
- if (newsect == NULL)
- return false;
- newsect->_raw_size = descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- return true;
-}
-
-#endif /* HAVE_PROCFS */
-
-/* Return a pointer to the args (including the command name) that were
- seen by the program that generated the core dump. Note that for
- some reason, a spurious space is tacked onto the end of the args
- in some (at least one anyway) implementations, so strip it off if
- it exists. */
-
-char *
-elf_core_file_failing_command (abfd)
- bfd *abfd;
-{
-#ifdef HAVE_PROCFS
- if (core_prpsinfo (abfd))
- {
- prpsinfo_t *p = core_prpsinfo (abfd);
- char *scan = p->pr_psargs;
- while (*scan++)
- {;
- }
- scan -= 2;
- if ((scan > p->pr_psargs) && (*scan == ' '))
- {
- *scan = '\000';
- }
- return p->pr_psargs;
- }
-#endif
- return NULL;
-}
-
-/* Return the number of the signal that caused the core dump. Presumably,
- since we have a core file, we got a signal of some kind, so don't bother
- checking the other process status fields, just return the signal number.
- */
-
-int
-elf_core_file_failing_signal (abfd)
- bfd *abfd;
-{
-#ifdef HAVE_PROCFS
- if (core_prstatus (abfd))
- {
- return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
- }
-#endif
- return -1;
-}
-
-/* Check to see if the core file could reasonably be expected to have
- come for the current executable file. Note that by default we return
- true unless we find something that indicates that there might be a
- problem.
- */
-
-boolean
-elf_core_file_matches_executable_p (core_bfd, exec_bfd)
- bfd *core_bfd;
- bfd *exec_bfd;
-{
-#ifdef HAVE_PROCFS
- char *corename;
- char *execname;
-#endif
-
- /* First, xvecs must match since both are ELF files for the same target. */
-
- if (core_bfd->xvec != exec_bfd->xvec)
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
-
-#ifdef HAVE_PROCFS
-
- /* If no prpsinfo, just return true. Otherwise, grab the last component
- of the exec'd pathname from the prpsinfo. */
-
- if (core_prpsinfo (core_bfd))
- {
- corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname);
- }
- else
- {
- return true;
- }
-
- /* Find the last component of the executable pathname. */
-
- if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
- {
- execname++;
- }
- else
- {
- execname = (char *) exec_bfd->filename;
- }
-
- /* See if they match */
-
- return strcmp (execname, corename) ? false : true;
-
-#else
-
- return true;
-
-#endif /* HAVE_PROCFS */
-}
-
-/* ELF core files contain a segment of type PT_NOTE, that holds much of
- the information that would normally be available from the /proc interface
- for the process, at the time the process dumped core. Currently this
- includes copies of the prstatus, prpsinfo, and fpregset structures.
-
- Since these structures are potentially machine dependent in size and
- ordering, bfd provides two levels of support for them. The first level,
- available on all machines since it does not require that the host
- have /proc support or the relevant include files, is to create a bfd
- section for each of the prstatus, prpsinfo, and fpregset structures,
- without any interpretation of their contents. With just this support,
- the bfd client will have to interpret the structures itself. Even with
- /proc support, it might want these full structures for it's own reasons.
-
- In the second level of support, where HAVE_PROCFS is defined, bfd will
- pick apart the structures to gather some additional information that
- clients may want, such as the general register set, the name of the
- exec'ed file and its arguments, the signal (if any) that caused the
- core dump, etc.
-
- */
-
-static boolean
-elf_corefile_note (abfd, hdr)
- bfd *abfd;
- Elf_Internal_Phdr *hdr;
-{
- Elf_External_Note *x_note_p; /* Elf note, external form */
- Elf_Internal_Note i_note; /* Elf note, internal form */
- char *buf = NULL; /* Entire note segment contents */
- char *namedata; /* Name portion of the note */
- char *descdata; /* Descriptor portion of the note */
- char *sectname; /* Name to use for new section */
- long filepos; /* File offset to descriptor data */
- asection *newsect;
-
- if (hdr->p_filesz > 0
- && (buf = (char *) malloc (hdr->p_filesz)) != NULL
- && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1
- && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz)
- {
- x_note_p = (Elf_External_Note *) buf;
- while ((char *) x_note_p < (buf + hdr->p_filesz))
- {
- i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
- i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
- i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
- namedata = x_note_p->name;
- descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
- filepos = hdr->p_offset + (descdata - buf);
- switch (i_note.type)
- {
- case NT_PRSTATUS:
- /* process descdata as prstatus info */
- if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".prstatus";
- break;
- case NT_FPREGSET:
- /* process descdata as fpregset info */
- if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".fpregset";
- break;
- case NT_PRPSINFO:
- /* process descdata as prpsinfo */
- if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".prpsinfo";
- break;
- default:
- /* Unknown descriptor, just ignore it. */
- sectname = NULL;
- break;
- }
- if (sectname != NULL)
- {
- newsect = bfd_make_section (abfd, sectname);
- if (newsect == NULL)
- return false;
- newsect->_raw_size = i_note.descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- }
- x_note_p = (Elf_External_Note *)
- (descdata + BFD_ALIGN (i_note.descsz, 4));
- }
- }
- if (buf != NULL)
- {
- free (buf);
- }
- else if (hdr->p_filesz > 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- return true;
-
-}
-
-/* Core files are simply standard ELF formatted files that partition
- the file using the execution view of the file (program header table)
- rather than the linking view. In fact, there is no section header
- table in a core file.
-
- The process status information (including the contents of the general
- register set) and the floating point register set are stored in a
- segment of type PT_NOTE. We handcraft a couple of extra bfd sections
- that allow standard bfd access to the general registers (.reg) and the
- floating point registers (.reg2).
-
- */
-
-const bfd_target *
-elf_core_file_p (abfd)
- bfd *abfd;
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Phdr x_phdr; /* Program header table entry, external form */
- Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
- unsigned int phindex;
- struct elf_backend_data *ebd;
-
- /* Read in the ELF header in external format. */
-
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- program header table (FIXME: See comments re segments at top of this
- file). */
-
- if (elf_file_p (&x_ehdr) == false)
- {
- wrong:
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* FIXME, Check EI_VERSION here ! */
-
- {
-#if ARCH_SIZE == 32
- int desired_address_size = ELFCLASS32;
-#endif
-#if ARCH_SIZE == 64
- int desired_address_size = ELFCLASS64;
-#endif
-
- if (x_ehdr.e_ident[EI_CLASS] != desired_address_size)
- goto wrong;
- }
-
- /* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA])
- {
- case ELFDATA2MSB: /* Big-endian */
- if (abfd->xvec->byteorder_big_p == false)
- goto wrong;
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->byteorder_big_p == true)
- goto wrong;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
- }
-
- /* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. */
-
- elf_tdata (abfd) =
- (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
- if (elf_tdata (abfd) == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
-
- /* FIXME, `wrong' returns from this point onward, leak memory. */
-
- /* Now that we know the byte order, swap in the rest of the header */
- i_ehdrp = elf_elfheader (abfd);
- elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
-
- ebd = get_elf_backend_data (abfd);
-
- /* Check that the ELF e_machine field matches what this particular
- BFD format expects. */
- if (ebd->elf_machine_code != i_ehdrp->e_machine)
- {
- const bfd_target * const *target_ptr;
-
- if (ebd->elf_machine_code != EM_NONE)
- goto wrong;
-
- /* This is the generic ELF target. Let it match any ELF target
- for which we do not have a specific backend. */
- for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
- {
- struct elf_backend_data *back;
-
- if ((*target_ptr)->flavour != bfd_target_elf_flavour)
- continue;
- back = (struct elf_backend_data *) (*target_ptr)->backend_data;
- if (back->elf_machine_code == i_ehdrp->e_machine)
- {
- /* target_ptr is an ELF backend which matches this
- object file, so reject the generic ELF target. */
- goto wrong;
- }
- }
- }
-
- /* If there is no program header, or the type is not a core file, then
- we are hosed. */
- if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
- goto wrong;
-
- /* Allocate space for a copy of the program header table in
- internal form, seek to the program header table in the file,
- read it in, and convert it to internal form. As a simple sanity
- check, verify that the what BFD thinks is the size of each program
- header table entry actually matches the size recorded in the file. */
-
- if (i_ehdrp->e_phentsize != sizeof (x_phdr))
- goto wrong;
- i_phdrp = (Elf_Internal_Phdr *)
- bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
- if (!i_phdrp)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
- return NULL;
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
- {
- if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
- != sizeof (x_phdr))
- return NULL;
- elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
- }
-
- /* Once all of the program headers have been read and converted, we
- can start processing them. */
-
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
- {
- bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
- if ((i_phdrp + phindex)->p_type == PT_NOTE)
- {
- if (! elf_corefile_note (abfd, i_phdrp + phindex))
- return NULL;
- }
- }
-
- /* Remember the entry point specified in the ELF file header. */
-
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
-
- return abfd->xvec;
-}
-\f
-/* ELF linker code. */
-
-static boolean elf_link_add_object_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_link_add_archive_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static Elf_Internal_Rela *elf_link_read_relocs
- PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
-static boolean elf_adjust_dynamic_symbol
- PARAMS ((struct elf_link_hash_entry *, PTR));
-
-/* Given an ELF BFD, add symbols to the global hash table as
- appropriate. */
-
-boolean
-elf_bfd_link_add_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- switch (bfd_get_format (abfd))
- {
- case bfd_object:
- return elf_link_add_object_symbols (abfd, info);
- case bfd_archive:
- return elf_link_add_archive_symbols (abfd, info);
- default:
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
-}
-
-/* Add symbols from an ELF archive file to the linker hash table. We
- don't use _bfd_generic_link_add_archive_symbols because of a
- problem which arises on UnixWare. The UnixWare libc.so is an
- archive which includes an entry libc.so.1 which defines a bunch of
- symbols. The libc.so archive also includes a number of other
- object files, which also define symbols, some of which are the same
- as those defined in libc.so.1. Correct linking requires that we
- consider each object file in turn, and include it if it defines any
- symbols we need. _bfd_generic_link_add_archive_symbols does not do
- this; it looks through the list of undefined symbols, and includes
- any object file which defines them. When this algorithm is used on
- UnixWare, it winds up pulling in libc.so.1 early and defining a
- bunch of symbols. This means that some of the other objects in the
- archive are not included in the link, which is incorrect since they
- precede libc.so.1 in the archive.
-
- Fortunately, ELF archive handling is simpler than that done by
- _bfd_generic_link_add_archive_symbols, which has to allow for a.out
- oddities. In ELF, if we find a symbol in the archive map, and the
- symbol is currently undefined, we know that we must pull in that
- object file.
-
- Unfortunately, we do have to make multiple passes over the symbol
- table until nothing further is resolved. */
-
-static boolean
-elf_link_add_archive_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- symindex c;
- boolean *defined = NULL;
- boolean *included = NULL;
- carsym *symdefs;
- boolean loop;
-
- if (! bfd_has_map (abfd))
- {
- /* An empty archive is a special case. */
- if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL)
- return true;
- bfd_set_error (bfd_error_no_symbols);
- return false;
- }
-
- /* Keep track of all symbols we know to be already defined, and all
- files we know to be already included. This is to speed up the
- second and subsequent passes. */
- c = bfd_ardata (abfd)->symdef_count;
- if (c == 0)
- return true;
- defined = (boolean *) malloc (c * sizeof (boolean));
- included = (boolean *) malloc (c * sizeof (boolean));
- if (defined == (boolean *) NULL || included == (boolean *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- memset (defined, 0, c * sizeof (boolean));
- memset (included, 0, c * sizeof (boolean));
-
- symdefs = bfd_ardata (abfd)->symdefs;
-
- do
- {
- file_ptr last;
- symindex i;
- carsym *symdef;
- carsym *symdefend;
-
- loop = false;
- last = -1;
-
- symdef = symdefs;
- symdefend = symdef + c;
- for (i = 0; symdef < symdefend; symdef++, i++)
- {
- struct elf_link_hash_entry *h;
- bfd *element;
- struct bfd_link_hash_entry *undefs_tail;
- symindex mark;
-
- if (defined[i] || included[i])
- continue;
- if (symdef->file_offset == last)
- {
- included[i] = true;
- continue;
- }
-
- h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
- false, false, false);
- if (h == (struct elf_link_hash_entry *) NULL)
- continue;
- if (h->root.type != bfd_link_hash_undefined)
- {
- defined[i] = true;
- continue;
- }
-
- /* We need to include this archive member. */
-
- element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
- if (element == (bfd *) NULL)
- goto error_return;
-
- if (! bfd_check_format (element, bfd_object))
- goto error_return;
-
- /* Doublecheck that we have not included this object
- already--it should be impossible, but there may be
- something wrong with the archive. */
- if (element->archive_pass != 0)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- element->archive_pass = 1;
-
- undefs_tail = info->hash->undefs_tail;
-
- if (! (*info->callbacks->add_archive_element) (info, element,
- symdef->name))
- goto error_return;
- if (! elf_link_add_object_symbols (element, info))
- goto error_return;
-
- /* If there are any new undefined symbols, we need to make
- another pass through the archive in order to see whether
- they can be defined. FIXME: This isn't perfect, because
- common symbols wind up on undefs_tail and because an
- undefined symbol which is defined later on in this pass
- does not require another pass. This isn't a bug, but it
- does make the code less efficient than it could be. */
- if (undefs_tail != info->hash->undefs_tail)
- loop = true;
-
- /* Look backward to mark all symbols from this object file
- which we have already seen in this pass. */
- mark = i;
- do
- {
- included[mark] = true;
- if (mark == 0)
- break;
- --mark;
- }
- while (symdefs[mark].file_offset == symdef->file_offset);
-
- /* We mark subsequent symbols from this object file as we go
- on through the loop. */
- last = symdef->file_offset;
- }
- }
- while (loop);
-
- free (defined);
- free (included);
-
- return true;
-
- error_return:
- if (defined != (boolean *) NULL)
- free (defined);
- if (included != (boolean *) NULL)
- free (included);
- return false;
-}
-
-/* Record a new dynamic symbol. We record the dynamic symbols as we
- read the input files, since we need to have a list of all of them
- before we can determine the final sizes of the output sections.
- Note that we may actually call this function even though we are not
- going to output any dynamic symbols; in some cases we know that a
- symbol should be in the dynamic symbol table, but only if there is
- one. */
-
-boolean
-elf_link_record_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
-{
- if (h->dynindx == -1)
- {
- struct bfd_strtab_hash *dynstr;
-
- h->dynindx = elf_hash_table (info)->dynsymcount;
- ++elf_hash_table (info)->dynsymcount;
-
- dynstr = elf_hash_table (info)->dynstr;
- if (dynstr == NULL)
- {
- /* Create a strtab to hold the dynamic symbol names. */
- elf_hash_table (info)->dynstr = dynstr = elf_stringtab_init ();
- if (dynstr == NULL)
- return false;
- }
-
- h->dynstr_index = ((unsigned long)
- _bfd_stringtab_add (dynstr, h->root.root.string,
- true, false));
- if (h->dynstr_index == (unsigned long) -1)
- return false;
- }
-
- return true;
-}
-
-/* Add symbols from an ELF object file to the linker hash table. */
-
-static boolean
-elf_link_add_object_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
- const Elf_Internal_Sym *,
- const char **, flagword *,
- asection **, bfd_vma *));
- boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *,
- asection *, const Elf_Internal_Rela *));
- boolean collect;
- Elf_Internal_Shdr *hdr;
- size_t symcount;
- size_t extsymcount;
- size_t extsymoff;
- Elf_External_Sym *buf = NULL;
- struct elf_link_hash_entry **sym_hash;
- boolean dynamic;
- Elf_External_Dyn *dynbuf = NULL;
- struct elf_link_hash_entry *weaks;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
-
- add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook;
- collect = get_elf_backend_data (abfd)->collect;
-
- /* A stripped shared library might only have a dynamic symbol table,
- not a regular symbol table. In that case we can still go ahead
- and link using the dynamic symbol table. */
- if (elf_onesymtab (abfd) == 0
- && elf_dynsymtab (abfd) != 0)
- {
- elf_onesymtab (abfd) = elf_dynsymtab (abfd);
- elf_tdata (abfd)->symtab_hdr = elf_tdata (abfd)->dynsymtab_hdr;
- }
-
- hdr = &elf_tdata (abfd)->symtab_hdr;
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- /* The sh_info field of the symtab header tells us where the
- external symbols start. We don't care about the local symbols at
- this point. */
- if (elf_bad_symtab (abfd))
- {
- extsymcount = symcount;
- extsymoff = 0;
- }
- else
- {
- extsymcount = symcount - hdr->sh_info;
- extsymoff = hdr->sh_info;
- }
-
- buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym));
- if (buf == NULL && extsymcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* We store a pointer to the hash table entry for each external
- symbol. */
- sym_hash = ((struct elf_link_hash_entry **)
- bfd_alloc (abfd,
- extsymcount * sizeof (struct elf_link_hash_entry *)));
- if (sym_hash == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- elf_sym_hashes (abfd) = sym_hash;
-
- if (elf_elfheader (abfd)->e_type != ET_DYN)
- {
- dynamic = false;
-
- /* If we are creating a shared library, create all the dynamic
- sections immediately. We need to attach them to something,
- so we attach them to this BFD, provided it is the right
- format. FIXME: If there are no input BFD's of the same
- format as the output, we can't make a shared library. */
- if (info->shared
- && ! elf_hash_table (info)->dynamic_sections_created
- && abfd->xvec == info->hash->creator)
- {
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
- }
- }
- else
- {
- asection *s;
- const char *name;
- bfd_size_type strindex;
-
- dynamic = true;
-
- /* You can't use -r against a dynamic object. Also, there's no
- hope of using a dynamic object which does not exactly match
- the format of the output file. */
- if (info->relocateable
- || info->hash->creator != abfd->xvec)
- {
- bfd_set_error (bfd_error_invalid_operation);
- goto error_return;
- }
-
- /* Find the name to use in a DT_NEEDED entry that refers to this
- object. If the object has a DT_SONAME entry, we use it.
- Otherwise, if the generic linker stuck something in
- elf_dt_needed_name, we use that. Otherwise, we just use the
- file name. */
- name = bfd_get_filename (abfd);
- if (elf_dt_needed_name (abfd) != NULL)
- name = elf_dt_needed_name (abfd);
- s = bfd_get_section_by_name (abfd, ".dynamic");
- if (s != NULL)
- {
- Elf_External_Dyn *extdyn;
- Elf_External_Dyn *extdynend;
-
- dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size);
- if (dynbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
- (file_ptr) 0, s->_raw_size))
- goto error_return;
-
- extdyn = dynbuf;
- extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
- for (; extdyn < extdynend; extdyn++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (abfd, extdyn, &dyn);
- if (dyn.d_tag == DT_SONAME)
- {
- int elfsec;
- unsigned long link;
-
- elfsec = elf_section_from_bfd_section (abfd, s);
- if (elfsec == -1)
- goto error_return;
- link = elf_elfsections (abfd)[elfsec]->sh_link;
- name = elf_string_from_elf_section (abfd, link,
- dyn.d_un.d_val);
- if (name == NULL)
- goto error_return;
-
- break;
- }
- }
-
- free (dynbuf);
- dynbuf = NULL;
- }
-
- /* We do not want to include any of the sections in a dynamic
- object in the output file. We hack by simply clobbering the
- list of sections in the BFD. This could be handled more
- cleanly by, say, a new section flag; the existing
- SEC_NEVER_LOAD flag is not the one we want, because that one
- still implies that the section takes up space in the output
- file. */
- abfd->sections = NULL;
-
- /* If this is the first dynamic object found in the link, create
- the special sections required for dynamic linking. */
- if (! elf_hash_table (info)->dynamic_sections_created)
- {
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
- }
-
- /* Add a DT_NEEDED entry for this dynamic object. */
- strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name,
- true, false);
- if (strindex == (bfd_size_type) -1)
- goto error_return;
- if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex))
- goto error_return;
- }
-
- if (bfd_seek (abfd,
- hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym),
- SEEK_SET) != 0
- || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd)
- != extsymcount * sizeof (Elf_External_Sym)))
- goto error_return;
-
- weaks = NULL;
-
- esymend = buf + extsymcount;
- for (esym = buf; esym < esymend; esym++, sym_hash++)
- {
- Elf_Internal_Sym sym;
- int bind;
- bfd_vma value;
- asection *sec;
- flagword flags;
- const char *name;
- struct elf_link_hash_entry *h = NULL;
- boolean definition;
-
- elf_swap_symbol_in (abfd, esym, &sym);
-
- flags = BSF_NO_FLAGS;
- sec = NULL;
- value = sym.st_value;
- *sym_hash = NULL;
-
- bind = ELF_ST_BIND (sym.st_info);
- if (bind == STB_LOCAL)
- {
- /* This should be impossible, since ELF requires that all
- global symbols follow all local symbols, and that sh_info
- point to the first global symbol. Unfortunatealy, Irix 5
- screws this up. */
- continue;
- }
- else if (bind == STB_GLOBAL)
- flags = BSF_GLOBAL;
- else if (bind == STB_WEAK)
- flags = BSF_WEAK;
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- if (sym.st_shndx == SHN_UNDEF)
- sec = bfd_und_section_ptr;
- else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE)
- {
- sec = section_from_elf_index (abfd, sym.st_shndx);
- if (sec != NULL)
- value -= sec->vma;
- else
- sec = bfd_abs_section_ptr;
- }
- else if (sym.st_shndx == SHN_ABS)
- sec = bfd_abs_section_ptr;
- else if (sym.st_shndx == SHN_COMMON)
- {
- sec = bfd_com_section_ptr;
- /* What ELF calls the size we call the value. What ELF
- calls the value we call the alignment. */
- value = sym.st_size;
- }
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
- if (name == (const char *) NULL)
- goto error_return;
-
- if (add_symbol_hook)
- {
- if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
- &value))
- goto error_return;
-
- /* The hook function sets the name to NULL if this symbol
- should be skipped for some reason. */
- if (name == (const char *) NULL)
- continue;
- }
-
- /* Sanity check that all possibilities were handled. */
- if (flags == BSF_NO_FLAGS || sec == (asection *) NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
-
- if (bfd_is_und_section (sec)
- || bfd_is_com_section (sec))
- definition = false;
- else
- definition = true;
-
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- /* We need to look up the symbol now in order to get some of
- the dynamic object handling right. We pass the hash
- table entry in to _bfd_generic_link_add_one_symbol so
- that it does not have to look it up again. */
- h = elf_link_hash_lookup (elf_hash_table (info), name,
- true, false, false);
- if (h == NULL)
- goto error_return;
- *sym_hash = h;
-
- /* If we are looking at a dynamic object, and this is a
- definition, we need to see if it has already been defined
- by some other object. If it has, we want to use the
- existing definition, and we do not want to report a
- multiple symbol definition error; we do this by
- clobbering sec to be bfd_und_section_ptr. */
- if (dynamic && definition)
- {
- if (h->root.type == bfd_link_hash_defined)
- sec = bfd_und_section_ptr;
- }
-
- /* Similarly, if we are not looking at a dynamic object, and
- we have a definition, we want to override any definition
- we may have from a dynamic object. Symbols from regular
- files always take precedence over symbols from dynamic
- objects, even if they are defined after the dynamic
- object in the link. */
- if (! dynamic
- && definition
- && h->root.type == bfd_link_hash_defined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (bfd_get_flavour (h->root.u.def.section->owner)
- == bfd_target_elf_flavour)
- && (elf_elfheader (h->root.u.def.section->owner)->e_type
- == ET_DYN))
- {
- /* Change the hash table entry to undefined, and let
- _bfd_generic_link_add_one_symbol do the right thing
- with the new definition. */
- h->root.type = bfd_link_hash_undefined;
- h->root.u.undef.abfd = h->root.u.def.section->owner;
- h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEFINED_WEAK;
- }
-
- /* If this is a weak definition which we are going to use,
- and the symbol is currently undefined, record that the
- definition is weak. */
- if (definition
- && (flags & BSF_WEAK) != 0
- && ! bfd_is_und_section (sec)
- && (h->root.type == bfd_link_hash_new
- || h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_weak))
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEFINED_WEAK;
- }
-
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, name, flags, sec, value, (const char *) NULL,
- false, collect, (struct bfd_link_hash_entry **) sym_hash)))
- goto error_return;
-
- if (dynamic
- && definition
- && (flags & BSF_WEAK) != 0
- && ELF_ST_TYPE (sym.st_info) != STT_FUNC
- && (*sym_hash)->weakdef == NULL)
- {
- /* Keep a list of all weak defined non function symbols from
- a dynamic object, using the weakdef field. Later in this
- function we will set the weakdef field to the correct
- value. We only put non-function symbols from dynamic
- objects on this list, because that happens to be the only
- time we need to know the normal symbol corresponding to a
- weak symbol, and the information is time consuming to
- figure out. If the weakdef field is not already NULL,
- then this symbol was already defined by some previous
- dynamic object, and we will be using that previous
- definition anyhow. */
-
- (*sym_hash)->weakdef = weaks;
- weaks = *sym_hash;
- }
-
- /* Get the alignment of a common symbol. */
- if (sym.st_shndx == SHN_COMMON
- && h->root.type == bfd_link_hash_common)
- h->root.u.c.alignment_power = bfd_log2 (sym.st_value);
-
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- int old_flags;
- boolean dynsym;
- int new_flag;
-
- /* Remember the symbol size and type. */
- if (sym.st_size != 0)
- {
- /* FIXME: We should probably somehow give a warning if
- the symbol size changes. */
- h->size = sym.st_size;
- }
- if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE)
- {
- /* FIXME: We should probably somehow give a warning if
- the symbol type changes. */
- h->type = ELF_ST_TYPE (sym.st_info);
- }
-
- /* Set a flag in the hash table entry indicating the type of
- reference or definition we just found. Keep a count of
- the number of dynamic symbols we find. A dynamic symbol
- is one which is referenced or defined by both a regular
- object and a shared object, or one which is referenced or
- defined by more than one shared object. */
- old_flags = h->elf_link_hash_flags;
- dynsym = false;
- if (! dynamic)
- {
- if (! definition)
- new_flag = ELF_LINK_HASH_REF_REGULAR;
- else
- new_flag = ELF_LINK_HASH_DEF_REGULAR;
- if (info->shared
- || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
- dynsym = true;
- }
- else
- {
- if (! definition)
- new_flag = ELF_LINK_HASH_REF_DYNAMIC;
- else
- new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
- if ((old_flags & new_flag) != 0
- || (old_flags & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR)) != 0)
- dynsym = true;
- }
-
- h->elf_link_hash_flags |= new_flag;
- if (dynsym && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- }
- }
- }
-
- /* Now set the weakdefs field correctly for all the weak defined
- symbols we found. The only way to do this is to search all the
- symbols. Since we only need the information for non functions in
- dynamic objects, that's the only time we actually put anything on
- the list WEAKS. We need this information so that if a regular
- object refers to a symbol defined weakly in a dynamic object, the
- real symbol in the dynamic object is also put in the dynamic
- symbols; we also must arrange for both symbols to point to the
- same memory location. We could handle the general case of symbol
- aliasing, but a general symbol alias can only be generated in
- assembler code, handling it correctly would be very time
- consuming, and other ELF linkers don't handle general aliasing
- either. */
- while (weaks != NULL)
- {
- struct elf_link_hash_entry *hlook;
- asection *slook;
- bfd_vma vlook;
- struct elf_link_hash_entry **hpp;
- struct elf_link_hash_entry **hppend;
-
- hlook = weaks;
- weaks = hlook->weakdef;
- hlook->weakdef = NULL;
-
- BFD_ASSERT (hlook->root.type == bfd_link_hash_defined);
- slook = hlook->root.u.def.section;
- vlook = hlook->root.u.def.value;
-
- hpp = elf_sym_hashes (abfd);
- hppend = hpp + extsymcount;
- for (; hpp < hppend; hpp++)
- {
- struct elf_link_hash_entry *h;
-
- h = *hpp;
- if (h != hlook
- && h->root.type == bfd_link_hash_defined
- && h->root.u.def.section == slook
- && h->root.u.def.value == vlook)
- {
- hlook->weakdef = h;
-
- /* If the weak definition is in the list of dynamic
- symbols, make sure the real definition is put there
- as well. */
- if (hlook->dynindx != -1
- && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- }
-
- break;
- }
- }
- }
-
- if (buf != NULL)
- {
- free (buf);
- buf = NULL;
- }
-
- /* If this object is the same format as the output object, and it is
- not a shared library, then let the backend look through the
- relocs.
-
- This is required to build global offset table entries and to
- arrange for dynamic relocs. It is not required for the
- particular common case of linking non PIC code, even when linking
- against shared libraries, but unfortunately there is no way of
- knowing whether an object file has been compiled PIC or not.
- Looking through the relocs is not particularly time consuming.
- The problem is that we must either (1) keep the relocs in memory,
- which causes the linker to require additional runtime memory or
- (2) read the relocs twice from the input file, which wastes time.
- This would be a good case for using mmap.
-
- I have no idea how to handle linking PIC code into a file of a
- different format. It probably can't be done. */
- check_relocs = get_elf_backend_data (abfd)->check_relocs;
- if (! dynamic
- && abfd->xvec == info->hash->creator
- && check_relocs != NULL)
- {
- asection *o;
-
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- Elf_Internal_Rela *internal_relocs;
- boolean ok;
-
- if ((o->flags & SEC_RELOC) == 0
- || o->reloc_count == 0)
- continue;
-
- /* I believe we can ignore the relocs for any section which
- does not form part of the final process image, such as a
- debugging section. */
- if ((o->flags & SEC_ALLOC) == 0)
- continue;
-
- internal_relocs = elf_link_read_relocs (abfd, o, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->keep_memory);
- if (internal_relocs == NULL)
- goto error_return;
-
- ok = (*check_relocs) (abfd, info, o, internal_relocs);
-
- if (! info->keep_memory)
- free (internal_relocs);
-
- if (! ok)
- goto error_return;
- }
- }
-
- return true;
-
- error_return:
- if (buf != NULL)
- free (buf);
- if (dynbuf != NULL)
- free (dynbuf);
- return false;
-}
-
-/* Create some sections which will be filled in with dynamic linking
- information. ABFD is an input file which requires dynamic sections
- to be created. The dynamic sections take up virtual memory space
- when the final executable is run, so we need to create them before
- addresses are assigned to the output sections. We work out the
- actual contents and size of these sections later. */
-
-boolean
-elf_link_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
- struct elf_backend_data *bed;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- return true;
-
- /* Make sure that all dynamic sections use the same input BFD. */
- if (elf_hash_table (info)->dynobj == NULL)
- elf_hash_table (info)->dynobj = abfd;
- else
- abfd = elf_hash_table (info)->dynobj;
-
- /* Note that we set the SEC_IN_MEMORY flag for all of these
- sections. */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- /* A dynamically linked executable has a .interp section, but a
- shared library does not. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".interp");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
- }
+ Elf_Internal_Shdr *hdr;
+ Elf_Internal_Shdr *verhdr;
+ unsigned long symcount; /* Number of external ELF symbols */
+ elf_symbol_type *sym; /* Pointer to current bfd symbol */
+ elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ Elf_Internal_Sym *isymbuf = NULL;
+ Elf_External_Versym *xver;
+ Elf_External_Versym *xverbuf = NULL;
+ struct elf_backend_data *ebd;
+ bfd_size_type amt;
- s = bfd_make_section (abfd, ".dynsym");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
+ /* Read each raw ELF symbol, converting from external ELF form to
+ internal ELF form, and then using the information to create a
+ canonical bfd symbol table entry.
- s = bfd_make_section (abfd, ".dynstr");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
+ Note that we allocate the initial bfd canonical symbol buffer
+ based on a one-to-one mapping of the ELF symbols to canonical
+ symbols. We actually use all the ELF symbols, so there will be no
+ space left over at the end. When we have all the symbols, we
+ build the caller's pointer vector. */
- /* Create a strtab to hold the dynamic symbol names. */
- if (elf_hash_table (info)->dynstr == NULL)
+ if (! dynamic)
{
- elf_hash_table (info)->dynstr = elf_stringtab_init ();
- if (elf_hash_table (info)->dynstr == NULL)
- return false;
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ verhdr = NULL;
}
-
- s = bfd_make_section (abfd, ".dynamic");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- /* The special symbol _DYNAMIC is always set to the start of the
- .dynamic section. This call occurs before we have processed the
- symbols for any dynamic object, so we don't have to worry about
- overriding a dynamic definition. We could set _DYNAMIC in a
- linker script, but we only want to define it if we are, in fact,
- creating a .dynamic section. We don't want to define it if there
- is no .dynamic section, since on some ELF platforms the start up
- code examines it to decide how to initialize the process. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! elf_link_record_dynamic_symbol (info, h))
- return false;
-
- s = bfd_make_section (abfd, ".hash");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- /* Let the backend create the rest of the sections. This lets the
- backend set the right flags. The backend will normally create
- the .got and .plt sections. */
- bed = get_elf_backend_data (abfd);
- if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info))
- return false;
-
- elf_hash_table (info)->dynamic_sections_created = true;
-
- return true;
-}
-
-/* Add an entry to the .dynamic table. */
-
-boolean
-elf_add_dynamic_entry (info, tag, val)
- struct bfd_link_info *info;
- bfd_vma tag;
- bfd_vma val;
-{
- Elf_Internal_Dyn dyn;
- bfd *dynobj;
- asection *s;
- size_t newsize;
- bfd_byte *newcontents;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- s = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (s != NULL);
-
- newsize = s->_raw_size + sizeof (Elf_External_Dyn);
- if (s->contents == NULL)
- newcontents = (bfd_byte *) malloc (newsize);
else
- newcontents = (bfd_byte *) realloc (s->contents, newsize);
- if (newcontents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- dyn.d_tag = tag;
- dyn.d_un.d_val = val;
- elf_swap_dyn_out (dynobj, &dyn,
- (Elf_External_Dyn *) (newcontents + s->_raw_size));
-
- s->_raw_size = newsize;
- s->contents = newcontents;
-
- return true;
-}
-
-/* Read and swap the relocs for a section. They may have been cached.
- If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
- they are used as buffers to read into. They are known to be large
- enough. If the INTERNAL_RELOCS relocs argument is NULL, the return
- value is allocated using either malloc or bfd_alloc, according to
- the KEEP_MEMORY argument. */
-
-static Elf_Internal_Rela *
-elf_link_read_relocs (abfd, o, external_relocs, internal_relocs, keep_memory)
- bfd *abfd;
- asection *o;
- PTR external_relocs;
- Elf_Internal_Rela *internal_relocs;
- boolean keep_memory;
-{
- Elf_Internal_Shdr *rel_hdr;
- PTR alloc1 = NULL;
- Elf_Internal_Rela *alloc2 = NULL;
-
- if (elf_section_data (o)->relocs != NULL)
- return elf_section_data (o)->relocs;
-
- if (o->reloc_count == 0)
- return NULL;
-
- rel_hdr = &elf_section_data (o)->rel_hdr;
-
- if (internal_relocs == NULL)
{
- size_t size;
-
- size = o->reloc_count * sizeof (Elf_Internal_Rela);
- if (keep_memory)
- internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
+ hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+ if (elf_dynversym (abfd) == 0)
+ verhdr = NULL;
else
- internal_relocs = alloc2 = (Elf_Internal_Rela *) malloc (size);
- if (internal_relocs == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- }
-
- if (external_relocs == NULL)
- {
- alloc1 = (PTR) malloc (rel_hdr->sh_size);
- if (alloc1 == NULL)
+ verhdr = &elf_tdata (abfd)->dynversym_hdr;
+ if ((elf_tdata (abfd)->dynverdef_section != 0
+ && elf_tdata (abfd)->verdef == NULL)
+ || (elf_tdata (abfd)->dynverref_section != 0
+ && elf_tdata (abfd)->verref == NULL))
{
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
+ if (! _bfd_elf_slurp_version_tables (abfd))
+ return -1;
}
- external_relocs = alloc1;
}
- if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0)
- || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd)
- != rel_hdr->sh_size))
- goto error_return;
-
- /* Swap in the relocs. For convenience, we always produce an
- Elf_Internal_Rela array; if the relocs are Rel, we set the addend
- to 0. */
- if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- Elf_External_Rel *erelend;
- Elf_Internal_Rela *irela;
-
- erel = (Elf_External_Rel *) external_relocs;
- erelend = erel + o->reloc_count;
- irela = internal_relocs;
- for (; erel < erelend; erel++, irela++)
- {
- Elf_Internal_Rel irel;
-
- elf_swap_reloc_in (abfd, erel, &irel);
- irela->r_offset = irel.r_offset;
- irela->r_info = irel.r_info;
- irela->r_addend = 0;
- }
- }
+ ebd = get_elf_backend_data (abfd);
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+ if (symcount == 0)
+ sym = symbase = NULL;
else
{
- Elf_External_Rela *erela;
- Elf_External_Rela *erelaend;
- Elf_Internal_Rela *irela;
-
- BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) external_relocs;
- erelaend = erela + o->reloc_count;
- irela = internal_relocs;
- for (; erela < erelaend; erela++, irela++)
- elf_swap_reloca_in (abfd, erela, irela);
- }
-
- /* Cache the results for next time, if we can. */
- if (keep_memory)
- elf_section_data (o)->relocs = internal_relocs;
-
- if (alloc1 != NULL)
- free (alloc1);
-
- /* Don't free alloc2, since if it was allocated we are passing it
- back (under the name of internal_relocs). */
-
- return internal_relocs;
-
- error_return:
- if (alloc1 != NULL)
- free (alloc1);
- if (alloc2 != NULL)
- free (alloc2);
- return NULL;
-}
-
-/* Record an assignment to a symbol made by a linker script. We need
- this in case some dynamic object refers to this symbol. */
-
-/*ARGSUSED*/
-boolean
-NAME(bfd_elf,record_link_assignment) (output_bfd, info, name)
- bfd *output_bfd;
- struct bfd_link_info *info;
- const char *name;
-{
- struct elf_link_hash_entry *h;
-
- h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false);
- if (h == NULL)
- return false;
-
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0
- || info->shared)
- && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- return false;
-
- /* If this is a weak defined symbol, and we know a corresponding
- real symbol from the same dynamic object, make sure the real
- symbol is also made into a dynamic symbol. */
- if (h->weakdef != NULL
- && h->weakdef->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h->weakdef))
- return false;
- }
- }
-
- return true;
-}
-
-/* Array used to determine the number of hash table buckets to use
- based on the number of symbols there are. If there are fewer than
- 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
- fewer than 37 we use 17 buckets, and so forth. We never use more
- than 521 buckets. */
-
-static const size_t elf_buckets[] =
-{
- 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0
-};
-
-/* Set up the sizes and contents of the ELF dynamic sections. This is
- called by the ELF linker emulation before_allocation routine. We
- must set the sizes of the sections before the linker sets the
- addresses of the various sections. */
-
-boolean
-NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, info,
- sinterpptr)
- bfd *output_bfd;
- const char *soname;
- const char *rpath;
- struct bfd_link_info *info;
- asection **sinterpptr;
-{
- bfd *dynobj;
- asection *s;
- Elf_Internal_Sym isym;
- size_t i;
- size_t bucketcount;
- struct elf_backend_data *bed;
-
- *sinterpptr = NULL;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- /* If there were no dynamic objects in the link, there is nothing to
- do here. */
- if (dynobj == NULL)
- return true;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- bfd_size_type strsize;
-
- *sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (*sinterpptr != NULL || info->shared);
-
- if (soname != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, soname,
- true, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, DT_SONAME, indx))
- return false;
- }
-
- if (rpath != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath,
- true, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, DT_RPATH, indx))
- return false;
- }
-
- /* Find all symbols which were defined in a dynamic object and make
- the backend pick a reasonable value for them. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_adjust_dynamic_symbol,
- (PTR) info);
-
- /* Add some entries to the .dynamic section. We fill in some of the
- values later, in elf_bfd_final_link, but we must add the entries
- now so that we know the final size of the .dynamic section. */
- if (bfd_get_section_by_name (output_bfd, ".init") != NULL)
- {
- if (! elf_add_dynamic_entry (info, DT_INIT, 0))
- return false;
- }
- if (bfd_get_section_by_name (output_bfd, ".fini") != NULL)
- {
- if (! elf_add_dynamic_entry (info, DT_FINI, 0))
- return false;
- }
- strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
- if (! elf_add_dynamic_entry (info, DT_HASH, 0)
- || ! elf_add_dynamic_entry (info, DT_STRTAB, 0)
- || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0)
- || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize)
- || ! elf_add_dynamic_entry (info, DT_SYMENT,
- sizeof (Elf_External_Sym)))
- return false;
- }
-
- /* The backend must work out the sizes of all the other dynamic
- sections. */
- bed = get_elf_backend_data (output_bfd);
- if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
- return false;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- size_t dynsymcount;
-
- /* Set the size of the .dynsym and .hash sections. We counted
- the number of dynamic symbols in elf_link_add_object_symbols.
- We will build the contents of .dynsym and .hash when we build
- the final symbol table, because until then we do not know the
- correct value to give the symbols. We built the .dynstr
- section as we went along in elf_link_add_object_symbols. */
- dynsymcount = elf_hash_table (info)->dynsymcount;
- s = bfd_get_section_by_name (dynobj, ".dynsym");
- BFD_ASSERT (s != NULL);
- s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+ isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return -1;
- /* The first entry in .dynsym is a dummy symbol. */
- isym.st_value = 0;
- isym.st_size = 0;
- isym.st_name = 0;
- isym.st_info = 0;
- isym.st_other = 0;
- isym.st_shndx = 0;
- elf_swap_symbol_out (output_bfd, &isym,
- (Elf_External_Sym *) s->contents);
-
- for (i = 0; elf_buckets[i] != 0; i++)
- {
- bucketcount = elf_buckets[i];
- if (dynsymcount < elf_buckets[i + 1])
- break;
- }
+ amt = symcount;
+ amt *= sizeof (elf_symbol_type);
+ symbase = (elf_symbol_type *) bfd_zalloc (abfd, amt);
+ if (symbase == (elf_symbol_type *) NULL)
+ goto error_return;
- s = bfd_get_section_by_name (dynobj, ".hash");
- BFD_ASSERT (s != NULL);
- s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL)
+ /* Read the raw ELF version symbol information. */
+ if (verhdr != NULL
+ && verhdr->sh_size / sizeof (Elf_External_Versym) != symcount)
{
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- memset (s->contents, 0, s->_raw_size);
-
- put_word (output_bfd, bucketcount, s->contents);
- put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8));
-
- elf_hash_table (info)->bucketcount = bucketcount;
-
- s = bfd_get_section_by_name (dynobj, ".dynstr");
- BFD_ASSERT (s != NULL);
- s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
-
- if (! elf_add_dynamic_entry (info, DT_NULL, 0))
- return false;
- }
-
- return true;
-}
+ (*_bfd_error_handler)
+ (_("%s: version count (%ld) does not match symbol count (%ld)"),
+ abfd->filename,
+ (long) (verhdr->sh_size / sizeof (Elf_External_Versym)),
+ symcount);
-/* Make the backend pick a good value for a dynamic symbol. This is
- called via elf_link_hash_traverse, and also calls itself
- recursively. */
-
-static boolean
-elf_adjust_dynamic_symbol (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct bfd_link_info *info = (struct bfd_link_info *) data;
- bfd *dynobj;
- struct elf_backend_data *bed;
-
- /* If this symbol does not require a PLT entry, and it is not
- defined by a dynamic object, or is not referenced by a regular
- object, ignore it. FIXME: Do we need to worry about symbols
- which are defined by one dynamic object and referenced by another
- one? */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0))
- return true;
-
- /* If we've already adjusted this symbol, don't do it again. This
- can happen via a recursive call. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
- return true;
-
- /* Don't look at this symbol again. Note that we must set this
- after checking the above conditions, because we may look at a
- symbol once, decide not to do anything, and then get called
- recursively later after REF_REGULAR is set below. */
- h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
-
- /* If this is a weak definition, and we know a real definition, and
- the real symbol is not itself defined by a regular object file,
- then get a good value for the real definition. We handle the
- real symbol first, for the convenience of the backend routine.
-
- Note that there is a confusing case here. If the real definition
- is defined by a regular object file, we don't get the real symbol
- from the dynamic object, but we do get the weak symbol. If the
- processor backend uses a COPY reloc, then if some routine in the
- dynamic object changes the real symbol, we will not see that
- change in the corresponding weak symbol. This is the way other
- ELF linkers work as well, and seems to be a result of the shared
- library model.
-
- I will clarify this issue. Most SVR4 shared libraries define the
- variable _timezone and define timezone as a weak synonym. The
- tzset call changes _timezone. If you write
- extern int timezone;
- int _timezone = 5;
- int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
- you might expect that, since timezone is a synonym for _timezone,
- the same number will print both times. However, if the processor
- backend uses a COPY reloc, then actually timezone will be copied
- into your process image, and, since you define _timezone
- yourself, _timezone will not. Thus timezone and _timezone will
- wind up at different memory locations. The tzset call will set
- _timezone, leaving timezone unchanged. */
-
- if (h->weakdef != NULL)
- {
- struct elf_link_hash_entry *weakdef;
-
- BFD_ASSERT (h->root.type == bfd_link_hash_defined);
- weakdef = h->weakdef;
- BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined);
- BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
- if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- {
- /* This symbol is defined by a regular object file, so we
- will not do anything special. Clear weakdef for the
- convenience of the processor backend. */
- h->weakdef = NULL;
- }
- else
- {
- /* There is an implicit reference by a regular object file
- via the weak symbol. */
- weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
- if (! elf_adjust_dynamic_symbol (weakdef, (PTR) info))
- return false;
+ /* Slurp in the symbols without the version information,
+ since that is more helpful than just quitting. */
+ verhdr = NULL;
}
- }
-
- dynobj = elf_hash_table (info)->dynobj;
- bed = get_elf_backend_data (dynobj);
- if (! (*bed->elf_backend_adjust_dynamic_symbol) (info, h))
- {
- /* FIXME: No way to return error. */
- abort ();
- }
-
- return true;
-}
-\f
-/* Final phase of ELF linker. */
-
-/* A structure we use to avoid passing large numbers of arguments. */
-
-struct elf_final_link_info
-{
- /* General link information. */
- struct bfd_link_info *info;
- /* Output BFD. */
- bfd *output_bfd;
- /* Symbol string table. */
- struct bfd_strtab_hash *symstrtab;
- /* .dynsym section. */
- asection *dynsym_sec;
- /* .hash section. */
- asection *hash_sec;
- /* Buffer large enough to hold contents of any section. */
- bfd_byte *contents;
- /* Buffer large enough to hold external relocs of any section. */
- PTR external_relocs;
- /* Buffer large enough to hold internal relocs of any section. */
- Elf_Internal_Rela *internal_relocs;
- /* Buffer large enough to hold external local symbols of any input
- BFD. */
- Elf_External_Sym *external_syms;
- /* Buffer large enough to hold internal local symbols of any input
- BFD. */
- Elf_Internal_Sym *internal_syms;
- /* Array large enough to hold a symbol index for each local symbol
- of any input BFD. */
- long *indices;
- /* Array large enough to hold a section pointer for each local
- symbol of any input BFD. */
- asection **sections;
- /* Buffer to hold swapped out symbols. */
- Elf_External_Sym *symbuf;
- /* Number of swapped out symbols in buffer. */
- size_t symbuf_count;
- /* Number of symbols which fit in symbuf. */
- size_t symbuf_size;
-};
-
-static boolean elf_link_output_sym
- PARAMS ((struct elf_final_link_info *, const char *,
- Elf_Internal_Sym *, asection *));
-static boolean elf_link_flush_output_syms
- PARAMS ((struct elf_final_link_info *));
-static boolean elf_link_output_extsym
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_input_bfd
- PARAMS ((struct elf_final_link_info *, bfd *));
-static boolean elf_reloc_link_order
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- struct bfd_link_order *));
-
-/* Do the final step of an ELF link. */
-
-boolean
-elf_bfd_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- bfd *dynobj;
- struct elf_final_link_info finfo;
- register asection *o;
- register struct bfd_link_order *p;
- register bfd *sub;
- size_t max_contents_size;
- size_t max_external_reloc_size;
- size_t max_internal_reloc_count;
- size_t max_sym_count;
- file_ptr off;
- Elf_Internal_Sym elfsym;
- unsigned int i;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- if (info->shared)
- abfd->flags |= DYNAMIC;
-
- dynamic = elf_hash_table (info)->dynamic_sections_created;
- dynobj = elf_hash_table (info)->dynobj;
-
- finfo.info = info;
- finfo.output_bfd = abfd;
- finfo.symstrtab = elf_stringtab_init ();
- if (finfo.symstrtab == NULL)
- return false;
- if (! dynamic)
- {
- finfo.dynsym_sec = NULL;
- finfo.hash_sec = NULL;
- }
- else
- {
- finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
- finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
- if (finfo.dynsym_sec == NULL
- || finfo.hash_sec == NULL)
- abort ();
- }
- finfo.contents = NULL;
- finfo.external_relocs = NULL;
- finfo.internal_relocs = NULL;
- finfo.external_syms = NULL;
- finfo.internal_syms = NULL;
- finfo.indices = NULL;
- finfo.sections = NULL;
- finfo.symbuf = NULL;
- finfo.symbuf_count = 0;
-
- /* Count up the number of relocations we will output for each output
- section, so that we know the sizes of the reloc sections. We
- also figure out some maximum sizes. */
- max_contents_size = 0;
- max_external_reloc_size = 0;
- max_internal_reloc_count = 0;
- max_sym_count = 0;
- for (o = abfd->sections; o != (asection *) NULL; o = o->next)
- {
- o->reloc_count = 0;
-
- for (p = o->link_order_head; p != NULL; p = p->next)
+ if (verhdr != NULL)
{
- if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- ++o->reloc_count;
- else if (p->type == bfd_indirect_link_order)
- {
- asection *sec;
-
- sec = p->u.indirect.section;
-
- if (info->relocateable)
- o->reloc_count += sec->reloc_count;
-
- if (sec->_raw_size > max_contents_size)
- max_contents_size = sec->_raw_size;
- if (sec->_cooked_size > max_contents_size)
- max_contents_size = sec->_cooked_size;
+ if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
+ goto error_return;
- /* We are interested in just local symbols, not all
- symbols. */
- if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour)
- {
- size_t sym_count;
-
- if (elf_bad_symtab (sec->owner))
- sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
- / sizeof (Elf_External_Sym));
- else
- sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
-
- if (sym_count > max_sym_count)
- max_sym_count = sym_count;
-
- if ((sec->flags & SEC_RELOC) != 0)
- {
- size_t ext_size;
-
- ext_size = elf_section_data (sec)->rel_hdr.sh_size;
- if (ext_size > max_external_reloc_size)
- max_external_reloc_size = ext_size;
- if (sec->reloc_count > max_internal_reloc_count)
- max_internal_reloc_count = sec->reloc_count;
- }
- }
- }
- }
+ xverbuf = (Elf_External_Versym *) bfd_malloc (verhdr->sh_size);
+ if (xverbuf == NULL && verhdr->sh_size != 0)
+ goto error_return;
- if (o->reloc_count > 0)
- o->flags |= SEC_RELOC;
- else
- {
- /* Explicitly clear the SEC_RELOC flag. The linker tends to
- set it (this is probably a bug) and if it is set
- assign_section_numbers will create a reloc section. */
- o->flags &=~ SEC_RELOC;
+ if (bfd_bread ((PTR) xverbuf, verhdr->sh_size, abfd)
+ != verhdr->sh_size)
+ goto error_return;
}
- /* If the SEC_ALLOC flag is not set, force the section VMA to
- zero. This is done in elf_fake_sections as well, but forcing
- the VMA to 0 here will ensure that relocs against these
- sections are handled correctly. */
- if ((o->flags & SEC_ALLOC) == 0)
- o->vma = 0;
- }
-
- /* Figure out the file positions for everything but the symbol table
- and the relocs. We set symcount to force assign_section_numbers
- to create a symbol table. */
- abfd->symcount = info->strip == strip_all ? 0 : 1;
- BFD_ASSERT (! abfd->output_has_begun);
- if (! elf_compute_section_file_positions (abfd, info))
- goto error_return;
-
- /* That created the reloc sections. Set their sizes, and assign
- them file positions, and allocate some buffers. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0)
+ /* Skip first symbol, which is a null dummy. */
+ xver = xverbuf;
+ if (xver != NULL)
+ ++xver;
+ isymend = isymbuf + symcount;
+ for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
{
- Elf_Internal_Shdr *rel_hdr;
- register struct elf_link_hash_entry **p, **pend;
-
- rel_hdr = &elf_section_data (o)->rel_hdr;
+ memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
+ sym->symbol.the_bfd = abfd;
- rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count;
+ sym->symbol.name = bfd_elf_string_from_elf_section (abfd,
+ hdr->sh_link,
+ isym->st_name);
- /* The contents field must last into write_object_contents,
- so we allocate it with bfd_alloc rather than malloc. */
- rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
- if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ sym->symbol.value = isym->st_value;
- p = ((struct elf_link_hash_entry **)
- malloc (o->reloc_count
- * sizeof (struct elf_link_hash_entry *)));
- if (p == NULL && o->reloc_count != 0)
+ if (isym->st_shndx == SHN_UNDEF)
{
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
+ sym->symbol.section = bfd_und_section_ptr;
}
- elf_section_data (o)->rel_hashes = p;
- pend = p + o->reloc_count;
- for (; p < pend; p++)
- *p = NULL;
-
- /* Use the reloc_count field as an index when outputting the
- relocs. */
- o->reloc_count = 0;
- }
- }
-
- assign_file_positions_for_relocs (abfd);
-
- /* We have now assigned file positions for all the sections except
- .symtab and .strtab. We start the .symtab section at the current
- file position, and write directly to it. We build the .strtab
- section in memory. When we add .dynsym support, we will build
- that in memory as well (.dynsym is smaller than .symtab). */
- abfd->symcount = 0;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- /* sh_name is set in prep_headers. */
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_flags = 0;
- symtab_hdr->sh_addr = 0;
- symtab_hdr->sh_size = 0;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
- /* sh_link is set in assign_section_numbers. */
- /* sh_info is set below. */
- /* sh_offset is set just below. */
- symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */
-
- off = elf_tdata (abfd)->next_file_pos;
- off = assign_file_position_for_section (symtab_hdr, off, true);
-
- /* Note that at this point elf_tdata (abfd)->next_file_pos is
- incorrect. We do not yet know the size of the .symtab section.
- We correct next_file_pos below, after we do know the size. */
-
- /* Allocate a buffer to hold swapped out symbols. This is to avoid
- continuously seeking to the right position in the file. */
- if (! info->keep_memory || max_sym_count < 20)
- finfo.symbuf_size = 20;
- else
- finfo.symbuf_size = max_sym_count;
- finfo.symbuf = ((Elf_External_Sym *)
- malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
- if (finfo.symbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* Start writing out the symbol table. The first symbol is always a
- dummy symbol. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = 0;
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_UNDEF;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, bfd_und_section_ptr))
- goto error_return;
-
-#if 0
- /* Some standard ELF linkers do this, but we don't because it causes
- bootstrap comparison failures. */
- /* Output a file symbol for the output file as the second symbol.
- We output this even if we are discarding local symbols, although
- I'm not sure if this is correct. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_ABS;
- if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd),
- &elfsym, bfd_abs_section_ptr))
- goto error_return;
-#endif
-
- /* Output a symbol for each section. We output these even if we are
- discarding local symbols, since they are used for relocs. These
- symbols have no names. We store the index of each one in the
- index field of the section, so that we can find it again when
- outputting relocs. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- elfsym.st_other = 0;
- for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
- {
- o = section_from_elf_index (abfd, i);
- if (o != NULL)
- o->target_index = abfd->symcount;
- elfsym.st_shndx = i;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, o))
- goto error_return;
- }
-
- /* Allocate some memory to hold information read in from the input
- files. */
- finfo.contents = (bfd_byte *) malloc (max_contents_size);
- finfo.external_relocs = (PTR) malloc (max_external_reloc_size);
- finfo.internal_relocs = ((Elf_Internal_Rela *)
- malloc (max_internal_reloc_count
- * sizeof (Elf_Internal_Rela)));
- finfo.external_syms = ((Elf_External_Sym *)
- malloc (max_sym_count * sizeof (Elf_External_Sym)));
- finfo.internal_syms = ((Elf_Internal_Sym *)
- malloc (max_sym_count * sizeof (Elf_Internal_Sym)));
- finfo.indices = (long *) malloc (max_sym_count * sizeof (long));
- finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *));
- if ((finfo.contents == NULL && max_contents_size != 0)
- || (finfo.external_relocs == NULL && max_external_reloc_size != 0)
- || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
- || (finfo.external_syms == NULL && max_sym_count != 0)
- || (finfo.internal_syms == NULL && max_sym_count != 0)
- || (finfo.indices == NULL && max_sym_count != 0)
- || (finfo.sections == NULL && max_sym_count != 0))
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* Since ELF permits relocations to be against local symbols, we
- must have the local symbols available when we do the relocations.
- Since we would rather only read the local symbols once, and we
- would rather not keep them in memory, we handle all the
- relocations for a single input file at the same time.
-
- Unfortunately, there is no way to know the total number of local
- symbols until we have seen all of them, and the local symbol
- indices precede the global symbol indices. This means that when
- we are generating relocateable output, and we see a reloc against
- a global symbol, we can not know the symbol index until we have
- finished examining all the local symbols to see which ones we are
- going to output. To deal with this, we keep the relocations in
- memory, and don't output them until the end of the link. This is
- an unfortunate waste of memory, but I don't see a good way around
- it. Fortunately, it only happens when performing a relocateable
- link, which is not the common case. FIXME: If keep_memory is set
- we could write the relocs out and then read them again; I don't
- know how bad the memory loss will be. */
-
- for (sub = info->input_bfds; sub != NULL; sub = sub->next)
- sub->output_has_begun = false;
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->link_order_head; p != NULL; p = p->next)
- {
- if (p->type == bfd_indirect_link_order
- && (bfd_get_flavour (p->u.indirect.section->owner)
- == bfd_target_elf_flavour))
+ else if (isym->st_shndx < SHN_LORESERVE
+ || isym->st_shndx > SHN_HIRESERVE)
{
- sub = p->u.indirect.section->owner;
- if (! sub->output_has_begun)
+ sym->symbol.section = section_from_elf_index (abfd,
+ isym->st_shndx);
+ if (sym->symbol.section == NULL)
{
- if (! elf_link_input_bfd (&finfo, sub))
- goto error_return;
- sub->output_has_begun = true;
+ /* This symbol is in a section for which we did not
+ create a BFD section. Just use bfd_abs_section,
+ although it is wrong. FIXME. */
+ sym->symbol.section = bfd_abs_section_ptr;
}
}
- else if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
+ else if (isym->st_shndx == SHN_ABS)
{
- if (! elf_reloc_link_order (abfd, info, o, p))
- goto error_return;
- }
- else
- {
- if (! _bfd_default_link_order (abfd, info, o, p))
- goto error_return;
- }
- }
- }
-
- /* That wrote out all the local symbols. Finish up the symbol table
- with the global symbols. */
-
- /* The sh_info field records the index of the first non local
- symbol. */
- symtab_hdr->sh_info = abfd->symcount;
- if (dynamic)
- elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1;
-
- /* We get the global symbols from the hash table. */
- elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
- (PTR) &finfo);
-
- /* Flush all symbols to the file. */
- if (! elf_link_flush_output_syms (&finfo))
- return false;
-
- /* Now we know the size of the symtab section. */
- off += symtab_hdr->sh_size;
-
- /* Finish up and write out the symbol string table (.strtab)
- section. */
- symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
- /* sh_name was set in prep_headers. */
- symstrtab_hdr->sh_type = SHT_STRTAB;
- symstrtab_hdr->sh_flags = 0;
- symstrtab_hdr->sh_addr = 0;
- symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
- symstrtab_hdr->sh_entsize = 0;
- symstrtab_hdr->sh_link = 0;
- symstrtab_hdr->sh_info = 0;
- /* sh_offset is set just below. */
- symstrtab_hdr->sh_addralign = 1;
-
- off = assign_file_position_for_section (symstrtab_hdr, off, true);
- elf_tdata (abfd)->next_file_pos = off;
-
- if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
- return false;
-
- /* Adjust the relocs to have the correct symbol indices. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- struct elf_link_hash_entry **rel_hash;
- Elf_Internal_Shdr *rel_hdr;
-
- if ((o->flags & SEC_RELOC) == 0)
- continue;
-
- rel_hash = elf_section_data (o)->rel_hashes;
- rel_hdr = &elf_section_data (o)->rel_hdr;
- for (i = 0; i < o->reloc_count; i++, rel_hash++)
- {
- if (*rel_hash == NULL)
- continue;
-
- BFD_ASSERT ((*rel_hash)->indx >= 0);
-
- if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- Elf_Internal_Rel irel;
-
- erel = (Elf_External_Rel *) rel_hdr->contents + i;
- elf_swap_reloc_in (abfd, erel, &irel);
- irel.r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irel.r_info));
- elf_swap_reloc_out (abfd, &irel, erel);
+ sym->symbol.section = bfd_abs_section_ptr;
}
- else
+ else if (isym->st_shndx == SHN_COMMON)
{
- Elf_External_Rela *erela;
- Elf_Internal_Rela irela;
-
- BFD_ASSERT (rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) rel_hdr->contents + i;
- elf_swap_reloca_in (abfd, erela, &irela);
- irela.r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irela.r_info));
- elf_swap_reloca_out (abfd, &irela, erela);
- }
- }
-
- /* Set the reloc_count field to 0 to prevent write_relocs from
- trying to swap the relocs out itself. */
- o->reloc_count = 0;
- }
-
- /* If we are linking against a dynamic object, or generating a
- shared library, finish up the dynamic linking information. */
- if (dynamic)
- {
- Elf_External_Dyn *dyncon, *dynconend;
-
- /* Fix up .dynamic entries. */
- o = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (o != NULL);
-
- dyncon = (Elf_External_Dyn *) o->contents;
- dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- const char *name;
- unsigned int type;
+ sym->symbol.section = bfd_com_section_ptr;
+ /* Elf puts the alignment into the `value' field, and
+ the size into the `size' field. BFD wants to see the
+ size in the value field, and doesn't care (at the
+ moment) about the alignment. */
+ sym->symbol.value = isym->st_size;
+ }
+ else
+ sym->symbol.section = bfd_abs_section_ptr;
- elf_swap_dyn_in (dynobj, dyncon, &dyn);
+ /* If this is a relocateable file, then the symbol value is
+ already section relative. */
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ sym->symbol.value -= sym->symbol.section->vma;
- switch (dyn.d_tag)
+ switch (ELF_ST_BIND (isym->st_info))
{
- default:
+ case STB_LOCAL:
+ sym->symbol.flags |= BSF_LOCAL;
break;
-
- case DT_INIT:
- name = ".init";
- goto get_vma;
- case DT_FINI:
- name = ".fini";
- goto get_vma;
- case DT_HASH:
- name = ".hash";
- goto get_vma;
- case DT_STRTAB:
- name = ".dynstr";
- goto get_vma;
- case DT_SYMTAB:
- name = ".dynsym";
- get_vma:
- o = bfd_get_section_by_name (abfd, name);
- BFD_ASSERT (o != NULL);
- dyn.d_un.d_ptr = o->vma;
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ case STB_GLOBAL:
+ if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
+ sym->symbol.flags |= BSF_GLOBAL;
break;
-
- case DT_REL:
- case DT_RELA:
- case DT_RELSZ:
- case DT_RELASZ:
- if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
- type = SHT_REL;
- else
- type = SHT_RELA;
- dyn.d_un.d_val = 0;
- for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = elf_elfsections (abfd)[i];
- if (hdr->sh_type == type
- && (hdr->sh_flags & SHF_ALLOC) != 0)
- {
- if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
- dyn.d_un.d_val += hdr->sh_size;
- else
- {
- if (dyn.d_un.d_val == 0
- || hdr->sh_addr < dyn.d_un.d_val)
- dyn.d_un.d_val = hdr->sh_addr;
- }
- }
- }
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ case STB_WEAK:
+ sym->symbol.flags |= BSF_WEAK;
break;
}
- }
- }
-
- /* If we have created any dynamic sections, then output them. */
- if (dynobj != NULL)
- {
- if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
- goto error_return;
- for (o = dynobj->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_HAS_CONTENTS) == 0
- || o->_raw_size == 0)
- continue;
- if ((o->flags & SEC_IN_MEMORY) == 0)
- {
- /* At this point, we are only interested in sections
- created by elf_link_create_dynamic_sections. FIXME:
- This test is fragile. */
- continue;
- }
- if ((elf_section_data (o->output_section)->this_hdr.sh_type
- != SHT_STRTAB)
- || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
+ switch (ELF_ST_TYPE (isym->st_info))
{
- if (! bfd_set_section_contents (abfd, o->output_section,
- o->contents, o->output_offset,
- o->_raw_size))
- goto error_return;
- }
- else
- {
- file_ptr off;
-
- /* The contents of the .dynstr section are actually in a
- stringtab. */
- off = elf_section_data (o->output_section)->this_hdr.sh_offset;
- if (bfd_seek (abfd, off, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd,
- elf_hash_table (info)->dynstr))
- goto error_return;
+ case STT_SECTION:
+ sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
+ break;
+ case STT_FILE:
+ sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
+ break;
+ case STT_FUNC:
+ sym->symbol.flags |= BSF_FUNCTION;
+ break;
+ case STT_OBJECT:
+ sym->symbol.flags |= BSF_OBJECT;
+ break;
}
- }
- }
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
- }
+ if (dynamic)
+ sym->symbol.flags |= BSF_DYNAMIC;
- elf_tdata (abfd)->linker = true;
+ if (xver != NULL)
+ {
+ Elf_Internal_Versym iversym;
- return true;
+ _bfd_elf_swap_versym_in (abfd, xver, &iversym);
+ sym->version = iversym.vs_vers;
+ xver++;
+ }
- error_return:
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
+ /* Do some backend-specific processing on this symbol. */
+ if (ebd->elf_backend_symbol_processing)
+ (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
+ }
}
- return false;
-}
+ /* Do some backend-specific processing on this symbol table. */
+ if (ebd->elf_backend_symbol_table_processing)
+ (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
-/* Add a symbol to the output symbol table. */
+ /* We rely on the zalloc to clear out the final symbol entry. */
-static boolean
-elf_link_output_sym (finfo, name, elfsym, input_sec)
- struct elf_final_link_info *finfo;
- const char *name;
- Elf_Internal_Sym *elfsym;
- asection *input_sec;
-{
- boolean (*output_symbol_hook) PARAMS ((bfd *,
- struct bfd_link_info *info,
- const char *,
- Elf_Internal_Sym *,
- asection *));
-
- output_symbol_hook = get_elf_backend_data (finfo->output_bfd)->
- elf_backend_link_output_symbol_hook;
- if (output_symbol_hook != NULL)
- {
- if (! ((*output_symbol_hook)
- (finfo->output_bfd, finfo->info, name, elfsym, input_sec)))
- return false;
- }
+ symcount = sym - symbase;
- if (name == (const char *) NULL || *name == '\0')
- elfsym->st_name = 0;
- else
+ /* Fill in the user's symbol pointer vector if needed. */
+ if (symptrs)
{
- elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
- name, true,
- false);
- if (elfsym->st_name == (unsigned long) -1)
- return false;
- }
+ long l = symcount;
- if (finfo->symbuf_count >= finfo->symbuf_size)
- {
- if (! elf_link_flush_output_syms (finfo))
- return false;
+ sym = symbase;
+ while (l-- > 0)
+ {
+ *symptrs++ = &sym->symbol;
+ sym++;
+ }
+ *symptrs = 0; /* Final null pointer */
}
- elf_swap_symbol_out (finfo->output_bfd, elfsym,
- finfo->symbuf + finfo->symbuf_count);
- ++finfo->symbuf_count;
-
- ++finfo->output_bfd->symcount;
+ if (xverbuf != NULL)
+ free (xverbuf);
+ if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ return symcount;
- return true;
+error_return:
+ if (xverbuf != NULL)
+ free (xverbuf);
+ if (isymbuf != NULL && hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ return -1;
}
-/* Flush the output symbols to the file. */
+/* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
+ them. */
-static boolean
-elf_link_flush_output_syms (finfo)
- struct elf_final_link_info *finfo;
+static bfd_boolean
+elf_slurp_reloc_table_from_section (abfd, asect, rel_hdr, reloc_count,
+ relents, symbols, dynamic)
+ bfd *abfd;
+ asection *asect;
+ Elf_Internal_Shdr *rel_hdr;
+ bfd_size_type reloc_count;
+ arelent *relents;
+ asymbol **symbols;
+ bfd_boolean dynamic;
{
- Elf_Internal_Shdr *symtab;
-
- symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr;
-
- if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size,
- SEEK_SET) != 0
- || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count,
- sizeof (Elf_External_Sym), finfo->output_bfd)
- != finfo->symbuf_count * sizeof (Elf_External_Sym)))
- return false;
+ struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
+ PTR allocated = NULL;
+ bfd_byte *native_relocs;
+ arelent *relent;
+ unsigned int i;
+ int entsize;
+ unsigned int symcount;
- symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym);
+ allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
+ if (allocated == NULL)
+ goto error_return;
- finfo->symbuf_count = 0;
+ if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
+ || (bfd_bread (allocated, rel_hdr->sh_size, abfd)
+ != rel_hdr->sh_size))
+ goto error_return;
- return true;
-}
+ native_relocs = (bfd_byte *) allocated;
-/* Add an external symbol to the symbol table. This is called from
- the hash table traversal routine. */
+ entsize = rel_hdr->sh_entsize;
+ BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
+ || entsize == sizeof (Elf_External_Rela));
-static boolean
-elf_link_output_extsym (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_final_link_info *finfo = (struct elf_final_link_info *) data;
- boolean strip;
- Elf_Internal_Sym sym;
- asection *input_sec;
-
- /* We don't want to output symbols that have never been mentioned by
- a regular file, or that we have been told to strip. However, if
- h->indx is set to -2, the symbol is used by a reloc and we must
- output it. */
- if (h->indx == -2)
- strip = false;
- else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- strip = true;
- else if (finfo->info->strip == strip_all
- || (finfo->info->strip == strip_some
- && bfd_hash_lookup (finfo->info->keep_hash,
- h->root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
-
- /* If we're stripping it, and it's not a dynamic symbol, there's
- nothing else to do. */
- if (strip && h->dynindx == -1)
- return true;
-
- sym.st_value = 0;
- sym.st_size = h->size;
- sym.st_other = 0;
- if (h->root.type == bfd_link_hash_weak
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEFINED_WEAK) != 0)
- sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
+ if (dynamic)
+ symcount = bfd_get_dynamic_symcount (abfd);
else
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
+ symcount = bfd_get_symcount (abfd);
- switch (h->root.type)
+ for (i = 0, relent = relents;
+ i < reloc_count;
+ i++, relent++, native_relocs += entsize)
{
- default:
- case bfd_link_hash_new:
- abort ();
- return false;
-
- case bfd_link_hash_undefined:
- input_sec = bfd_und_section_ptr;
- sym.st_shndx = SHN_UNDEF;
- break;
-
- case bfd_link_hash_weak:
- input_sec = bfd_und_section_ptr;
- sym.st_shndx = SHN_UNDEF;
- break;
-
- case bfd_link_hash_defined:
- {
- input_sec = h->root.u.def.section;
- if (input_sec->output_section != NULL)
- {
- sym.st_shndx =
- elf_section_from_bfd_section (finfo->output_bfd,
- input_sec->output_section);
- if (sym.st_shndx == (unsigned short) -1)
- {
- /* FIXME: No way to handle errors. */
- abort ();
- }
-
- /* ELF symbols in relocateable files are section relative,
- but in nonrelocateable files they are virtual
- addresses. */
- sym.st_value = h->root.u.def.value + input_sec->output_offset;
- if (! finfo->info->relocateable)
- sym.st_value += input_sec->output_section->vma;
- }
- else
- {
- BFD_ASSERT (bfd_get_flavour (input_sec->owner)
- == bfd_target_elf_flavour
- && elf_elfheader (input_sec->owner)->e_type == ET_DYN);
- sym.st_shndx = SHN_UNDEF;
- input_sec = bfd_und_section_ptr;
- }
- }
- break;
+ Elf_Internal_Rela rela;
- case bfd_link_hash_common:
- input_sec = bfd_com_section_ptr;
- sym.st_shndx = SHN_COMMON;
- sym.st_value = 1 << h->root.u.c.alignment_power;
- break;
+ if (entsize == sizeof (Elf_External_Rela))
+ elf_swap_reloca_in (abfd, native_relocs, &rela);
+ else
+ elf_swap_reloc_in (abfd, native_relocs, &rela);
- case bfd_link_hash_indirect:
- case bfd_link_hash_warning:
- /* I have no idea how these should be handled. */
- return true;
- }
+ /* The address of an ELF reloc is section relative for an object
+ file, and absolute for an executable file or shared library.
+ The address of a normal BFD reloc is always section relative,
+ and the address of a dynamic reloc is absolute.. */
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
+ relent->address = rela.r_offset;
+ else
+ relent->address = rela.r_offset - asect->vma;
- /* If this symbol should be put in the .dynsym section, then put it
- there now. We have already know the symbol index. We also fill
- in the entry in the .hash section. */
- if (h->dynindx != -1
- && elf_hash_table (finfo->info)->dynamic_sections_created)
- {
- struct elf_backend_data *bed;
- size_t bucketcount;
- size_t bucket;
- bfd_byte *bucketpos;
- bfd_vma chain;
-
- sym.st_name = h->dynstr_index;
-
- /* Give the processor backend a chance to tweak the symbol
- value, and also to finish up anything that needs to be done
- for this symbol. */
- bed = get_elf_backend_data (finfo->output_bfd);
- if (! ((*bed->elf_backend_finish_dynamic_symbol)
- (finfo->output_bfd, finfo->info, h, &sym)))
+ if (ELF_R_SYM (rela.r_info) == 0)
+ relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ else if (ELF_R_SYM (rela.r_info) > symcount)
{
- /* FIXME: No way to return error. */
- abort ();
+ (*_bfd_error_handler)
+ (_("%s(%s): relocation %d has invalid symbol index %ld"),
+ abfd->filename, asect->name, i, ELF_R_SYM (rela.r_info));
+ relent->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
}
+ else
+ {
+ asymbol **ps, *s;
- elf_swap_symbol_out (finfo->output_bfd, &sym,
- ((Elf_External_Sym *) finfo->dynsym_sec->contents
- + h->dynindx));
-
- bucketcount = elf_hash_table (finfo->info)->bucketcount;
- bucket = (bfd_elf_hash ((const unsigned char *) h->root.root.string)
- % bucketcount);
- bucketpos = ((bfd_byte *) finfo->hash_sec->contents
- + (bucket + 2) * (ARCH_SIZE / 8));
- chain = get_word (finfo->output_bfd, bucketpos);
- put_word (finfo->output_bfd, h->dynindx, bucketpos);
- put_word (finfo->output_bfd, chain,
- ((bfd_byte *) finfo->hash_sec->contents
- + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8)));
- }
+ ps = symbols + ELF_R_SYM (rela.r_info) - 1;
+ s = *ps;
- /* If we're stripping it, then it was just a dynamic symbol, and
- there's nothing else to do. */
- if (strip)
- return true;
+ /* Canonicalize ELF section symbols. FIXME: Why? */
+ if ((s->flags & BSF_SECTION_SYM) == 0)
+ relent->sym_ptr_ptr = ps;
+ else
+ relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
+ }
- h->indx = finfo->output_bfd->symcount;
+ relent->addend = rela.r_addend;
- if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec))
- {
- /* FIXME: No way to return error. */
- abort ();
+ if (entsize == sizeof (Elf_External_Rela))
+ (*ebd->elf_info_to_howto) (abfd, relent, &rela);
+ else
+ (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela);
}
- return true;
+ if (allocated != NULL)
+ free (allocated);
+
+ return TRUE;
+
+ error_return:
+ if (allocated != NULL)
+ free (allocated);
+ return FALSE;
}
-/* Link an input file into the linker output file. This function
- handles all the sections and relocations of the input file at once.
- This is so that we only have to read the local symbols once, and
- don't have to keep them in memory. */
+/* Read in and swap the external relocs. */
-static boolean
-elf_link_input_bfd (finfo, input_bfd)
- struct elf_final_link_info *finfo;
- bfd *input_bfd;
+bfd_boolean
+elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
+ bfd *abfd;
+ asection *asect;
+ asymbol **symbols;
+ bfd_boolean dynamic;
{
- boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
- bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *,
- Elf_Internal_Sym *, asection **));
- bfd *output_bfd;
- Elf_Internal_Shdr *symtab_hdr;
- size_t locsymcount;
- size_t extsymoff;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
- Elf_Internal_Sym *isym;
- long *pindex;
- asection **ppsection;
- asection *o;
-
- output_bfd = finfo->output_bfd;
- relocate_section =
- get_elf_backend_data (output_bfd)->elf_backend_relocate_section;
-
- /* If this is a dynamic object, we don't want to do anything here:
- we don't want the local symbols, and we don't want the section
- contents. */
- if (elf_elfheader (input_bfd)->e_type == ET_DYN)
- return true;
-
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- if (elf_bad_symtab (input_bfd))
- {
- locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- extsymoff = 0;
- }
- else
- {
- locsymcount = symtab_hdr->sh_info;
- extsymoff = symtab_hdr->sh_info;
- }
+ struct bfd_elf_section_data * const d = elf_section_data (asect);
+ Elf_Internal_Shdr *rel_hdr;
+ Elf_Internal_Shdr *rel_hdr2;
+ bfd_size_type reloc_count;
+ bfd_size_type reloc_count2;
+ arelent *relents;
+ bfd_size_type amt;
+
+ if (asect->relocation != NULL)
+ return TRUE;
- /* Read the local symbols. */
- if (locsymcount > 0
- && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym),
- locsymcount, input_bfd)
- != locsymcount * sizeof (Elf_External_Sym))))
- return false;
-
- /* Swap in the local symbols and write out the ones which we know
- are going into the output file. */
- esym = finfo->external_syms;
- esymend = esym + locsymcount;
- isym = finfo->internal_syms;
- pindex = finfo->indices;
- ppsection = finfo->sections;
- for (; esym < esymend; esym++, isym++, pindex++, ppsection++)
+ if (! dynamic)
{
- asection *isec;
- const char *name;
- Elf_Internal_Sym osym;
+ if ((asect->flags & SEC_RELOC) == 0
+ || asect->reloc_count == 0)
+ return TRUE;
- elf_swap_symbol_in (input_bfd, esym, isym);
- *pindex = -1;
+ rel_hdr = &d->rel_hdr;
+ reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
+ rel_hdr2 = d->rel_hdr2;
+ reloc_count2 = (rel_hdr2 ? NUM_SHDR_ENTRIES (rel_hdr2) : 0);
- if (elf_bad_symtab (input_bfd))
- {
- if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
- {
- *ppsection = NULL;
- continue;
- }
- }
+ BFD_ASSERT (asect->reloc_count == reloc_count + reloc_count2);
+ BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
+ || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
- if (isym->st_shndx == SHN_UNDEF)
- isec = bfd_und_section_ptr;
- else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE)
- isec = section_from_elf_index (input_bfd, isym->st_shndx);
- else if (isym->st_shndx == SHN_ABS)
- isec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- isec = bfd_com_section_ptr;
- else
- {
- /* Who knows? */
- isec = NULL;
- }
+ }
+ else
+ {
+ /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
+ case because relocations against this section may use the
+ dynamic symbol table, and in that case bfd_section_from_shdr
+ in elf.c does not update the RELOC_COUNT. */
+ if (asect->_raw_size == 0)
+ return TRUE;
- *ppsection = isec;
-
- /* Don't output the first, undefined, symbol. */
- if (esym == finfo->external_syms)
- continue;
-
- /* If we are stripping all symbols, we don't want to output this
- one. */
- if (finfo->info->strip == strip_all)
- continue;
-
- /* We never output section symbols. Instead, we use the section
- symbol of the corresponding section in the output file. */
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- continue;
-
- /* If we are discarding all local symbols, we don't want to
- output this one. If we are generating a relocateable output
- file, then some of the local symbols may be required by
- relocs; we output them below as we discover that they are
- needed. */
- if (finfo->info->discard == discard_all)
- continue;
-
- /* Get the name of the symbol. */
- name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
- isym->st_name);
- if (name == NULL)
- return false;
-
- /* See if we are discarding symbols with this name. */
- if ((finfo->info->strip == strip_some
- && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
- == NULL))
- || (finfo->info->discard == discard_l
- && strncmp (name, finfo->info->lprefix,
- finfo->info->lprefix_len) == 0))
- continue;
-
- /* If we get here, we are going to output this symbol. */
-
- osym = *isym;
-
- /* Adjust the section index for the output file. */
- osym.st_shndx = elf_section_from_bfd_section (output_bfd,
- isec->output_section);
- if (osym.st_shndx == (unsigned short) -1)
- return false;
-
- *pindex = output_bfd->symcount;
-
- /* ELF symbols in relocateable files are section relative, but
- in executable files they are virtual addresses. Note that
- this code assumes that all ELF sections have an associated
- BFD section with a reasonable value for output_offset; below
- we assume that they also have a reasonable value for
- output_section. Any special sections must be set up to meet
- these requirements. */
- osym.st_value += isec->output_offset;
- if (! finfo->info->relocateable)
- osym.st_value += isec->output_section->vma;
-
- if (! elf_link_output_sym (finfo, name, &osym, isec))
- return false;
+ rel_hdr = &d->this_hdr;
+ reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
+ rel_hdr2 = NULL;
+ reloc_count2 = 0;
}
- /* Relocate the contents of each section. */
- for (o = input_bfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_HAS_CONTENTS) == 0)
- continue;
+ amt = (reloc_count + reloc_count2) * sizeof (arelent);
+ relents = (arelent *) bfd_alloc (abfd, amt);
+ if (relents == NULL)
+ return FALSE;
- if ((o->flags & SEC_IN_MEMORY) != 0
- && input_bfd == elf_hash_table (finfo->info)->dynobj)
- {
- /* Section was created by elf_link_create_dynamic_sections.
- FIXME: This test is fragile. */
- continue;
- }
+ if (!elf_slurp_reloc_table_from_section (abfd, asect,
+ rel_hdr, reloc_count,
+ relents,
+ symbols, dynamic))
+ return FALSE;
- /* Read the contents of the section. */
- if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
- (file_ptr) 0, o->_raw_size))
- return false;
+ if (rel_hdr2
+ && !elf_slurp_reloc_table_from_section (abfd, asect,
+ rel_hdr2, reloc_count2,
+ relents + reloc_count,
+ symbols, dynamic))
+ return FALSE;
- if ((o->flags & SEC_RELOC) != 0)
- {
- Elf_Internal_Rela *internal_relocs;
-
- /* Get the swapped relocs. */
- internal_relocs = elf_link_read_relocs (input_bfd, o,
- finfo->external_relocs,
- finfo->internal_relocs,
- false);
- if (internal_relocs == NULL
- && o->reloc_count > 0)
- return false;
-
- /* Relocate the section by invoking a back end routine.
-
- The back end routine is responsible for adjusting the
- section contents as necessary, and (if using Rela relocs
- and generating a relocateable output file) adjusting the
- reloc addend as necessary.
-
- The back end routine does not have to worry about setting
- the reloc address or the reloc symbol index.
-
- The back end routine is given a pointer to the swapped in
- internal symbols, and can access the hash table entries
- for the external symbols via elf_sym_hashes (input_bfd).
-
- When generating relocateable output, the back end routine
- must handle STB_LOCAL/STT_SECTION symbols specially. The
- output symbol is going to be a section symbol
- corresponding to the output section, which will require
- the addend to be adjusted. */
-
- if (! (*relocate_section) (output_bfd, finfo->info,
- input_bfd, o,
- finfo->contents,
- internal_relocs,
- finfo->internal_syms,
- finfo->sections))
- return false;
-
- if (finfo->info->relocateable)
- {
- Elf_Internal_Rela *irela;
- Elf_Internal_Rela *irelaend;
- struct elf_link_hash_entry **rel_hash;
- Elf_Internal_Shdr *input_rel_hdr;
- Elf_Internal_Shdr *output_rel_hdr;
-
- /* Adjust the reloc addresses and symbol indices. */
-
- irela = internal_relocs;
- irelaend = irela + o->reloc_count;
- rel_hash = (elf_section_data (o->output_section)->rel_hashes
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, rel_hash++)
- {
- long r_symndx;
- Elf_Internal_Sym *isym;
- asection *sec;
-
- irela->r_offset += o->output_offset;
-
- r_symndx = ELF_R_SYM (irela->r_info);
-
- if (r_symndx == 0)
- continue;
-
- if (r_symndx >= locsymcount
- || (elf_bad_symtab (input_bfd)
- && finfo->sections[r_symndx] == NULL))
- {
- long indx;
-
- /* This is a reloc against a global symbol. We
- have not yet output all the local symbols, so
- we do not know the symbol index of any global
- symbol. We set the rel_hash entry for this
- reloc to point to the global hash table entry
- for this symbol. The symbol index is then
- set at the end of elf_bfd_final_link. */
- indx = r_symndx - extsymoff;
- *rel_hash = elf_sym_hashes (input_bfd)[indx];
-
- /* Setting the index to -2 tells
- elf_link_output_extsym that this symbol is
- used by a reloc. */
- BFD_ASSERT ((*rel_hash)->indx < 0);
- (*rel_hash)->indx = -2;
-
- continue;
- }
-
- /* This is a reloc against a local symbol. */
-
- *rel_hash = NULL;
- isym = finfo->internal_syms + r_symndx;
- sec = finfo->sections[r_symndx];
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- {
- /* I suppose the backend ought to fill in the
- section of any STT_SECTION symbol against a
- processor specific section. */
- if (sec != NULL && bfd_is_abs_section (sec))
- r_symndx = 0;
- else if (sec == NULL || sec->owner == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- {
- r_symndx = sec->output_section->target_index;
- if (r_symndx == 0)
- abort ();
- }
- }
- else
- {
- if (finfo->indices[r_symndx] == -1)
- {
- unsigned long link;
- const char *name;
- asection *osec;
-
- if (finfo->info->strip == strip_all)
- {
- /* You can't do ld -r -s. */
- bfd_set_error (bfd_error_invalid_operation);
- return false;
- }
-
- /* This symbol was skipped earlier, but
- since it is needed by a reloc, we
- must output it now. */
- link = symtab_hdr->sh_link;
- name = elf_string_from_elf_section (input_bfd,
- link,
- isym->st_name);
- if (name == NULL)
- return false;
+ asect->relocation = relents;
+ return TRUE;
+}
- osec = sec->output_section;
- isym->st_shndx =
- elf_section_from_bfd_section (output_bfd,
- osec);
- if (isym->st_shndx == (unsigned short) -1)
- return false;
+#ifdef DEBUG
+static void
+elf_debug_section (num, hdr)
+ int num;
+ Elf_Internal_Shdr *hdr;
+{
+ fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
+ hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
+ (long) hdr);
+ fprintf (stderr,
+ "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
+ (long) hdr->sh_name,
+ (long) hdr->sh_type,
+ (long) hdr->sh_flags);
+ fprintf (stderr,
+ "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
+ (long) hdr->sh_addr,
+ (long) hdr->sh_offset,
+ (long) hdr->sh_size);
+ fprintf (stderr,
+ "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
+ (long) hdr->sh_link,
+ (long) hdr->sh_info,
+ (long) hdr->sh_addralign);
+ fprintf (stderr, "sh_entsize = %ld\n",
+ (long) hdr->sh_entsize);
+ fflush (stderr);
+}
- isym->st_value += sec->output_offset;
- if (! finfo->info->relocateable)
- isym->st_value += osec->vma;
+static void
+elf_debug_file (ehdrp)
+ Elf_Internal_Ehdr *ehdrp;
+{
+ fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
+ fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
+ fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
+ fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
+ fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
+ fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
+ fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
+}
- finfo->indices[r_symndx] = output_bfd->symcount;
+static char *
+elf_symbol_flags (flags)
+ flagword flags;
+{
+ static char buffer[1024];
- if (! elf_link_output_sym (finfo, name, isym, sec))
- return false;
- }
+ buffer[0] = '\0';
+ if (flags & BSF_LOCAL)
+ strcat (buffer, " local");
- r_symndx = finfo->indices[r_symndx];
- }
+ if (flags & BSF_GLOBAL)
+ strcat (buffer, " global");
- irela->r_info = ELF_R_INFO (r_symndx,
- ELF_R_TYPE (irela->r_info));
- }
+ if (flags & BSF_DEBUGGING)
+ strcat (buffer, " debug");
- /* Swap out the relocs. */
- input_rel_hdr = &elf_section_data (o)->rel_hdr;
- output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr;
- BFD_ASSERT (output_rel_hdr->sh_entsize
- == input_rel_hdr->sh_entsize);
- irela = internal_relocs;
- irelaend = irela + o->reloc_count;
- if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
-
- erel = ((Elf_External_Rel *) output_rel_hdr->contents
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, erel++)
- {
- Elf_Internal_Rel irel;
-
- irel.r_offset = irela->r_offset;
- irel.r_info = irela->r_info;
- BFD_ASSERT (irela->r_addend == 0);
- elf_swap_reloc_out (output_bfd, &irel, erel);
- }
- }
- else
- {
- Elf_External_Rela *erela;
-
- BFD_ASSERT (input_rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela));
- erela = ((Elf_External_Rela *) output_rel_hdr->contents
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, erela++)
- elf_swap_reloca_out (output_bfd, irela, erela);
- }
+ if (flags & BSF_FUNCTION)
+ strcat (buffer, " function");
- o->output_section->reloc_count += o->reloc_count;
- }
- }
+ if (flags & BSF_KEEP)
+ strcat (buffer, " keep");
- /* Write out the modified section contents. */
- if (! bfd_set_section_contents (output_bfd, o->output_section,
- finfo->contents, o->output_offset,
- (o->_cooked_size != 0
- ? o->_cooked_size
- : o->_raw_size)))
- return false;
- }
+ if (flags & BSF_KEEP_G)
+ strcat (buffer, " keep_g");
- return true;
-}
+ if (flags & BSF_WEAK)
+ strcat (buffer, " weak");
-/* Generate a reloc when linking an ELF file. This is a reloc
- requested by the linker, and does come from any input file. This
- is used to build constructor and destructor tables when linking
- with -Ur. */
-
-static boolean
-elf_reloc_link_order (output_bfd, info, output_section, link_order)
- bfd *output_bfd;
- struct bfd_link_info *info;
- asection *output_section;
- struct bfd_link_order *link_order;
-{
- const reloc_howto_type *howto;
- long indx;
- bfd_vma offset;
- struct elf_link_hash_entry **rel_hash_ptr;
- Elf_Internal_Shdr *rel_hdr;
+ if (flags & BSF_SECTION_SYM)
+ strcat (buffer, " section-sym");
- howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
- if (howto == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
+ if (flags & BSF_OLD_COMMON)
+ strcat (buffer, " old-common");
- /* If this is an inplace reloc, we must write the addend into the
- object file. */
- if (howto->partial_inplace
- && link_order->u.reloc.p->addend != 0)
- {
- bfd_size_type size;
- bfd_reloc_status_type rstat;
- bfd_byte *buf;
- boolean ok;
-
- size = bfd_get_reloc_size (howto);
- buf = (bfd_byte *) bfd_zmalloc (size);
- if (buf == (bfd_byte *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- rstat = _bfd_relocate_contents (howto, output_bfd,
- link_order->u.reloc.p->addend, buf);
- switch (rstat)
- {
- case bfd_reloc_ok:
- break;
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
- if (! ((*info->callbacks->reloc_overflow)
- (info,
- (link_order->type == bfd_section_reloc_link_order
- ? bfd_section_name (output_bfd,
- link_order->u.reloc.p->u.section)
- : link_order->u.reloc.p->u.name),
- howto->name, link_order->u.reloc.p->addend,
- (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
- {
- free (buf);
- return false;
- }
- break;
- }
- ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
- (file_ptr) link_order->offset, size);
- free (buf);
- if (! ok)
- return false;
- }
+ if (flags & BSF_NOT_AT_END)
+ strcat (buffer, " not-at-end");
- /* Figure out the symbol index. */
- rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
- + output_section->reloc_count);
- if (link_order->type == bfd_section_reloc_link_order)
- {
- indx = link_order->u.reloc.p->u.section->target_index;
- if (indx == 0)
- abort ();
- *rel_hash_ptr = NULL;
- }
- else
- {
- struct elf_link_hash_entry *h;
+ if (flags & BSF_CONSTRUCTOR)
+ strcat (buffer, " constructor");
- h = elf_link_hash_lookup (elf_hash_table (info),
- link_order->u.reloc.p->u.name,
- false, false, true);
- if (h != NULL)
- {
- /* Setting the index to -2 tells elf_link_output_extsym that
- this symbol is used by a reloc. */
- h->indx = -2;
- *rel_hash_ptr = h;
- indx = 0;
- }
- else
- {
- if (! ((*info->callbacks->unattached_reloc)
- (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
- (asection *) NULL, (bfd_vma) 0)))
- return false;
- indx = 0;
- }
- }
+ if (flags & BSF_WARNING)
+ strcat (buffer, " warning");
- /* The address of a reloc is relative to the section in a
- relocateable file, and is a virtual address in an executable
- file. */
- offset = link_order->offset;
- if (! info->relocateable)
- offset += output_section->vma;
+ if (flags & BSF_INDIRECT)
+ strcat (buffer, " indirect");
- rel_hdr = &elf_section_data (output_section)->rel_hdr;
+ if (flags & BSF_FILE)
+ strcat (buffer, " file");
- if (rel_hdr->sh_type == SHT_REL)
- {
- Elf_Internal_Rel irel;
- Elf_External_Rel *erel;
-
- irel.r_offset = offset;
- irel.r_info = ELF_R_INFO (indx, howto->type);
- erel = ((Elf_External_Rel *) rel_hdr->contents
- + output_section->reloc_count);
- elf_swap_reloc_out (output_bfd, &irel, erel);
- }
- else
- {
- Elf_Internal_Rela irela;
- Elf_External_Rela *erela;
-
- irela.r_offset = offset;
- irela.r_info = ELF_R_INFO (indx, howto->type);
- irela.r_addend = link_order->u.reloc.p->addend;
- erela = ((Elf_External_Rela *) rel_hdr->contents
- + output_section->reloc_count);
- elf_swap_reloca_out (output_bfd, &irela, erela);
- }
+ if (flags & DYNAMIC)
+ strcat (buffer, " dynamic");
- ++output_section->reloc_count;
+ if (flags & ~(BSF_LOCAL
+ | BSF_GLOBAL
+ | BSF_DEBUGGING
+ | BSF_FUNCTION
+ | BSF_KEEP
+ | BSF_KEEP_G
+ | BSF_WEAK
+ | BSF_SECTION_SYM
+ | BSF_OLD_COMMON
+ | BSF_NOT_AT_END
+ | BSF_CONSTRUCTOR
+ | BSF_WARNING
+ | BSF_INDIRECT
+ | BSF_FILE
+ | BSF_DYNAMIC))
+ strcat (buffer, " unknown-bits");
- return true;
+ return buffer;
}
+#endif
+\f
+#include "elfcore.h"
+#include "elflink.h"
+\f
+/* Size-dependent data and functions. */
+const struct elf_size_info NAME(_bfd_elf,size_info) = {
+ sizeof (Elf_External_Ehdr),
+ sizeof (Elf_External_Phdr),
+ sizeof (Elf_External_Shdr),
+ sizeof (Elf_External_Rel),
+ sizeof (Elf_External_Rela),
+ sizeof (Elf_External_Sym),
+ sizeof (Elf_External_Dyn),
+ sizeof (Elf_External_Note),
+ 4,
+ 1,
+ ARCH_SIZE, FILE_ALIGN,
+ ELFCLASS, EV_CURRENT,
+ elf_write_out_phdrs,
+ elf_write_shdrs_and_ehdr,
+ elf_write_relocs,
+ elf_swap_symbol_in,
+ elf_swap_symbol_out,
+ elf_slurp_reloc_table,
+ elf_slurp_symbol_table,
+ elf_swap_dyn_in,
+ elf_swap_dyn_out,
+ elf_swap_reloc_in,
+ elf_swap_reloc_out,
+ elf_swap_reloca_in,
+ elf_swap_reloca_out
+};
projects / deliverable / binutils-gdb.git / blobdiff