/* 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, 2003, 2004, 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
/* Problems and other issues to resolve.
(1) BFD expects there to be some fixed number of "sections" in
- the object file. I.E. there is a "section_count" variable in the
+ the object file. I.E. there is a "section_count" variable in the
bfd structure which contains the number of sections. However, ELF
supports multiple "views" of a file. In particular, with current
implementations, executable files typically have two tables, a
(3) ELF section symbols are handled rather sloppily now. This should
be cleaned up, and ELF section symbols reconciled with BFD section
symbols.
+
+ (4) We need a published spec for 64-bit ELF. We've got some stuff here
+ that we're using for SPARC V9 64-bit chips, but don't assume that
+ 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_External_Phdr NAME(Elf,External_Phdr)
#define Elf_External_Rel NAME(Elf,External_Rel)
#define Elf_External_Rela NAME(Elf,External_Rela)
+#define Elf_External_Dyn NAME(Elf,External_Dyn)
#define elf_core_file_failing_command NAME(bfd_elf,core_file_failing_command)
#define elf_core_file_failing_signal NAME(bfd_elf,core_file_failing_signal)
-#define elf_core_file_matches_executable_p NAME(bfd_elf,core_file_matches_executable_p)
+#define elf_core_file_matches_executable_p \
+ NAME(bfd_elf,core_file_matches_executable_p)
#define elf_object_p NAME(bfd_elf,object_p)
#define elf_core_file_p NAME(bfd_elf,core_file_p)
#define elf_get_symtab_upper_bound NAME(bfd_elf,get_symtab_upper_bound)
+#define elf_get_dynamic_symtab_upper_bound \
+ NAME(bfd_elf,get_dynamic_symtab_upper_bound)
+#define elf_swap_reloc_in NAME(bfd_elf,swap_reloc_in)
+#define elf_swap_reloca_in NAME(bfd_elf,swap_reloca_in)
+#define elf_swap_reloc_out NAME(bfd_elf,swap_reloc_out)
+#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_get_symtab NAME(bfd_elf,get_symtab)
+#define elf_slurp_symbol_table NAME(bfd_elf,slurp_symbol_table)
+#define elf_canonicalize_symtab NAME(bfd_elf,canonicalize_symtab)
+#define elf_canonicalize_dynamic_symtab \
+ NAME(bfd_elf,canonicalize_dynamic_symtab)
+#define elf_get_synthetic_symtab \
+ NAME(bfd_elf,get_synthetic_symtab)
#define elf_make_empty_symbol NAME(bfd_elf,make_empty_symbol)
#define elf_get_symbol_info NAME(bfd_elf,get_symbol_info)
-#define elf_print_symbol NAME(bfd_elf,print_symbol)
#define elf_get_lineno NAME(bfd_elf,get_lineno)
#define elf_set_arch_mach NAME(bfd_elf,set_arch_mach)
#define elf_find_nearest_line NAME(bfd_elf,find_nearest_line)
#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_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)
#if ARCH_SIZE == 64
#define ELF_R_INFO(X,Y) ELF64_R_INFO(X,Y)
#define ELF_R_SYM(X) ELF64_R_SYM(X)
+#define ELF_R_TYPE(X) ELF64_R_TYPE(X)
#define ELFCLASS ELFCLASS64
#define FILE_ALIGN 8
+#define LOG_FILE_ALIGN 3
#endif
#if ARCH_SIZE == 32
#define ELF_R_INFO(X,Y) ELF32_R_INFO(X,Y)
#define ELF_R_SYM(X) ELF32_R_SYM(X)
+#define ELF_R_TYPE(X) ELF32_R_TYPE(X)
#define ELFCLASS ELFCLASS32
#define FILE_ALIGN 4
+#define LOG_FILE_ALIGN 2
#endif
-static int shstrtab_length_fixed;
-
-struct elf_sect_data {
- int reloc_sec;
- /* more? */
-};
-
-/* Forward declarations of static functions */
-
-static struct sec * section_from_elf_index PARAMS ((bfd *, unsigned int));
-
-static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *));
-
-static boolean elf_slurp_symbol_table PARAMS ((bfd *, asymbol **));
-
-static int elf_symbol_from_bfd_symbol PARAMS ((bfd *,
- struct symbol_cache_entry **));
-
-static boolean elf_map_symbols PARAMS ((bfd *));
-static boolean swap_out_syms PARAMS ((bfd *));
-
-#ifdef DEBUG
-static void elf_debug_section PARAMS ((char *, int, Elf_Internal_Shdr *));
-static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
+#if DEBUG & 2
+static void elf_debug_section (int, Elf_Internal_Shdr *);
+#endif
+#if DEBUG & 1
+static void elf_debug_file (Elf_Internal_Ehdr *);
#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. */
-static void
-DEFUN (elf_swap_symbol_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Sym * src AND
- 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);
+void
+elf_swap_symbol_in (bfd *abfd,
+ const void *psrc,
+ const void *pshn,
+ Elf_Internal_Sym *dst)
+{
+ const Elf_External_Sym *src = psrc;
+ const Elf_External_Sym_Shndx *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. */
-static void
-DEFUN (elf_swap_symbol_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Sym * src AND
- 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);
+void
+elf_swap_symbol_out (bfd *abfd,
+ const Elf_Internal_Sym *src,
+ void *cdst,
+ void *shndx)
+{
+ unsigned int tmp;
+ Elf_External_Sym *dst = 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
-DEFUN (elf_swap_ehdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Ehdr * src AND
- Elf_Internal_Ehdr * dst)
+elf_swap_ehdr_in (bfd *abfd,
+ 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
-DEFUN (elf_swap_ehdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Ehdr * src AND
- Elf_External_Ehdr * dst)
+elf_swap_ehdr_out (bfd *abfd,
+ 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
-DEFUN (elf_swap_shdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Shdr * src AND
- Elf_Internal_Shdr * dst)
+elf_swap_shdr_in (bfd *abfd,
+ 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);
- /* we haven't done any processing on it yet, so... */
- dst->rawdata = (void *) 0;
+ 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
-DEFUN (elf_swap_shdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Shdr * src AND
- 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);
+elf_swap_shdr_out (bfd *abfd,
+ const Elf_Internal_Shdr *src,
+ Elf_External_Shdr *dst)
+{
+ /* 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. */
-
-static void
-DEFUN (elf_swap_phdr_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Phdr * src AND
- 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);
-}
-
-static void
-DEFUN (elf_swap_phdr_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Phdr * src AND
- 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);
-}
-
-/* Translate an ELF reloc from external format to internal format. */
-static INLINE void
-DEFUN (elf_swap_reloc_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rel * src AND
- Elf_Internal_Rel * dst)
-{
- dst->r_offset = get_word (abfd, (bfd_byte *) src->r_offset);
- dst->r_info = get_word (abfd, (bfd_byte *) src->r_info);
-}
-
-static INLINE void
-DEFUN (elf_swap_reloca_in, (abfd, src, dst),
- bfd * abfd AND
- Elf_External_Rela * src AND
- 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);
-}
+ ELF program header table entry in internal format. */
-/* Translate an ELF reloc from internal format to external format. */
-static INLINE void
-DEFUN (elf_swap_reloc_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rel * src AND
- Elf_External_Rel * dst)
-{
- put_word (abfd, src->r_offset, dst->r_offset);
- put_word (abfd, src->r_info, dst->r_info);
-}
-
-static INLINE void
-DEFUN (elf_swap_reloca_out, (abfd, src, dst),
- bfd * abfd AND
- Elf_Internal_Rela * src AND
- Elf_External_Rela * dst)
-{
- 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);
-}
-
-\f
-
-/* String table creation/manipulation routines */
-
-static struct strtab *
-DEFUN (bfd_new_strtab, (abfd),
- bfd * abfd)
+void
+elf_swap_phdr_in (bfd *abfd,
+ const Elf_External_Phdr *src,
+ Elf_Internal_Phdr *dst)
{
- struct strtab *ss;
+ int signed_vma = get_elf_backend_data (abfd)->sign_extend_vma;
- ss = (struct strtab *) malloc (sizeof (struct strtab));
- if (!ss)
+ 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)
{
- bfd_set_error (bfd_error_no_memory);
- return NULL;
+ dst->p_vaddr = H_GET_SIGNED_WORD (abfd, src->p_vaddr);
+ dst->p_paddr = H_GET_SIGNED_WORD (abfd, src->p_paddr);
}
- ss->tab = malloc (1);
- if (!ss->tab)
+ else
{
- bfd_set_error (bfd_error_no_memory);
- return NULL;
+ dst->p_vaddr = H_GET_WORD (abfd, src->p_vaddr);
+ dst->p_paddr = H_GET_WORD (abfd, src->p_paddr);
}
- *ss->tab = 0;
- ss->nentries = 0;
- ss->length = 1;
-
- return ss;
+ 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 int
-DEFUN (bfd_add_to_strtab, (abfd, ss, str),
- bfd * abfd AND
- struct strtab *ss AND
- CONST char *str)
+void
+elf_swap_phdr_out (bfd *abfd,
+ const Elf_Internal_Phdr *src,
+ Elf_External_Phdr *dst)
+{
+ /* 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. */
+void
+elf_swap_reloc_in (bfd *abfd,
+ const bfd_byte *s,
+ Elf_Internal_Rela *dst)
{
- /* should search first, but for now: */
- /* include the trailing NUL */
- int ln = strlen (str) + 1;
-
- /* should this be using obstacks? */
- ss->tab = realloc (ss->tab, ss->length + ln);
-
- BFD_ASSERT (ss->tab != 0); /* FIXME */
- strcpy (ss->tab + ss->length, str);
- ss->nentries++;
- ss->length += ln;
-
- return ss->length - ln;
+ 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;
}
-static int
-DEFUN (bfd_add_2_to_strtab, (abfd, ss, str, str2),
- bfd * abfd AND
- struct strtab *ss AND
- char *str AND
- CONST char *str2)
+void
+elf_swap_reloca_in (bfd *abfd,
+ const bfd_byte *s,
+ Elf_Internal_Rela *dst)
{
- /* should search first, but for now: */
- /* include the trailing NUL */
- int ln = strlen (str) + strlen (str2) + 1;
-
- /* should this be using obstacks? */
- if (ss->length)
- ss->tab = realloc (ss->tab, ss->length + ln);
- else
- ss->tab = malloc (ln);
-
- BFD_ASSERT (ss->tab != 0); /* FIXME */
- strcpy (ss->tab + ss->length, str);
- strcpy (ss->tab + ss->length + strlen (str), str2);
- ss->nentries++;
- ss->length += ln;
-
- return ss->length - ln;
+ 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);
}
-\f
-/* ELF .o/exec file reading */
-
-/* Create a new bfd section from an ELF section header. */
-
-static boolean
-DEFUN (bfd_section_from_shdr, (abfd, shindex),
- bfd * abfd AND
- unsigned int shindex)
+/* Translate an ELF reloc from internal format to external format. */
+void
+elf_swap_reloc_out (bfd *abfd,
+ const Elf_Internal_Rela *src,
+ bfd_byte *d)
{
- Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
- Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
- asection *newsect;
- 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:
- case SHT_DYNAMIC:
- /* Bits that get saved. This one is real. */
- if (!hdr->rawdata)
- {
- newsect = bfd_make_section (abfd, name);
- if (newsect != NULL)
- {
- newsect->filepos = hdr->sh_offset; /* so we can read back the bits */
- newsect->flags |= SEC_HAS_CONTENTS;
- newsect->vma = hdr->sh_addr;
- newsect->_raw_size = hdr->sh_size;
- newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
-
- if (hdr->sh_flags & SHF_ALLOC)
- {
- newsect->flags |= SEC_ALLOC;
- newsect->flags |= SEC_LOAD;
- }
-
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
-
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
- else if (newsect->flags & SEC_ALLOC)
- newsect->flags |= SEC_DATA;
-
- /* The debugging sections appear to recognized only by
- name. */
- if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
- || strncmp (name, ".line", sizeof ".line" - 1) == 0
- || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
- newsect->flags |= SEC_DEBUGGING;
-
- hdr->rawdata = (void *) newsect;
- }
- else
- hdr->rawdata = (void *) bfd_get_section_by_name (abfd, name);
- }
- return true;
-
- case SHT_NOBITS:
- /* Bits that get saved. This one is real. */
- if (!hdr->rawdata)
- {
- newsect = bfd_make_section (abfd, name);
- if (newsect != NULL)
- {
- newsect->vma = hdr->sh_addr;
- newsect->_raw_size = hdr->sh_size;
- newsect->filepos = hdr->sh_offset; /* fake */
- newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
- if (hdr->sh_flags & SHF_ALLOC)
- newsect->flags |= SEC_ALLOC;
-
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
-
- /* FIXME: This section is empty. Does it really make
- sense to set SEC_CODE for it? */
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE; /* FIXME: may only contain SOME code */
-
- hdr->rawdata = (void *) newsect;
- }
- }
- return true;
-
- 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;
- return true;
-
- case SHT_STRTAB: /* A string table */
- if (hdr->rawdata)
- return true;
- if (ehdr->e_shstrndx == shindex)
- {
- elf_tdata(abfd)->shstrtab_hdr = *hdr;
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->shstrtab_hdr;
- hdr->rawdata = (PTR) &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)
- {
- bfd_section_from_shdr (abfd, i);
- if (elf_onesymtab (abfd) == i)
- {
- elf_tdata(abfd)->strtab_hdr = *hdr;
- elf_elfsections(abfd)[shindex] = &elf_tdata(abfd)->strtab_hdr;
- return true;
- }
-#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->rawdata;
- if (!newsect)
- break;
- hdr->rawdata = (PTR) newsect;
- hdr2 = &elf_section_data (newsect)->str_hdr;
- *hdr2 = *hdr;
- elf_elfsections(abfd)[shindex] = hdr2;
-#endif
- }
- }
- }
-
- newsect = bfd_make_section (abfd, name);
- if (newsect)
- {
- newsect->flags = SEC_HAS_CONTENTS;
- hdr->rawdata = (PTR) newsect;
- newsect->_raw_size = hdr->sh_size;
- newsect->alignment_power = bfd_log2 (hdr->sh_addralign);
- newsect->vma = hdr->sh_addr;
- newsect->filepos = hdr->sh_offset;
-
- if (hdr->sh_flags & SHF_ALLOC)
- newsect->flags |= SEC_ALLOC|SEC_LOAD;
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE;
- else if (newsect->flags & SEC_ALLOC)
- newsect->flags |= SEC_DATA;
-
- /* Check for debugging string tables. */
- if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0
- || strncmp (name, ".stab", sizeof ".stab" - 1) == 0)
- newsect->flags |= SEC_DEBUGGING;
- }
-
- return true;
-
- case SHT_REL:
- case SHT_RELA:
- /* *These* do a lot of work -- but build no sections!
- The spec says there can be multiple strtabs, but only one symtab,
- but there can be lots of REL* sections. */
- /* FIXME: The above statement is wrong! There are typically at least
- two symbol tables in a dynamically linked executable, ".dynsym"
- which is the dynamic linkage symbol table and ".symtab", which is
- the "traditional" symbol table. -fnf */
-
- {
- asection *target_sect;
- Elf_Internal_Shdr *hdr2;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- /* 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_REL)));
- BFD_ASSERT (!(!use_rela_p && (hdr->sh_type == SHT_RELA)));
- BFD_ASSERT (hdr->sh_entsize ==
- (use_rela_p
- ? sizeof (Elf_External_Rela)
- : sizeof (Elf_External_Rel)));
-
- bfd_section_from_shdr (abfd, hdr->sh_info); /* target */
- bfd_section_from_shdr (abfd, hdr->sh_link); /* symbol table */
- target_sect = section_from_elf_index (abfd, hdr->sh_info);
- if (target_sect == NULL
- || elf_section_data (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 = 0;
- target_sect->rel_filepos = hdr->sh_offset;
- abfd->flags |= HAS_RELOC;
- return true;
- }
- break;
-
- case SHT_HASH:
- case SHT_DYNSYM: /* could treat this like symtab... */
-#if 0
- fprintf (stderr, "Dynamic Linking sections not yet supported.\n");
- BFD_FAIL ();
-#endif
- 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;
+ 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);
}
-boolean
-DEFUN (elf_new_section_hook, (abfd, sec),
- bfd *abfd
- AND asection *sec)
+void
+elf_swap_reloca_out (bfd *abfd,
+ const Elf_Internal_Rela *src,
+ bfd_byte *d)
{
- 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;
+ 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);
}
-/* 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.
+void
+elf_swap_dyn_in (bfd *abfd,
+ const void *p,
+ Elf_Internal_Dyn *dst)
+{
+ const Elf_External_Dyn *src = 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);
+}
-static boolean
-DEFUN (bfd_section_from_phdr, (abfd, hdr, index),
- bfd * abfd AND
- Elf_Internal_Phdr * hdr AND
- int index)
+void
+elf_swap_dyn_out (bfd *abfd,
+ const Elf_Internal_Dyn *src,
+ void *p)
{
- 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);
- 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);
- 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;
- }
+ Elf_External_Dyn *dst = p;
- return true;
+ 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 */
/* Begin processing a given object.
First we validate the file by reading in the ELF header and checking
the magic number. */
-static INLINE boolean
-DEFUN (elf_file_p, (x_ehdrp), Elf_External_Ehdr * x_ehdrp)
+static inline bfd_boolean
+elf_file_p (Elf_External_Ehdr *x_ehdrp)
{
return ((x_ehdrp->e_ident[EI_MAG0] == ELFMAG0)
&& (x_ehdrp->e_ident[EI_MAG1] == ELFMAG1)
&& (x_ehdrp->e_ident[EI_MAG3] == ELFMAG3));
}
+/* Determines if a given section index is valid. */
+
+static inline bfd_boolean
+valid_section_index_p (unsigned index, unsigned num_sections)
+{
+ /* Note: We allow SHN_UNDEF as a valid section index. */
+ if (index < SHN_LORESERVE || index > SHN_HIRESERVE)
+ return index < num_sections;
+
+ /* We disallow the use of reserved indcies, except for those
+ with OS or Application specific meaning. The test make use
+ of the knowledge that:
+ SHN_LORESERVE == SHN_LOPROC
+ and
+ SHN_HIPROC == SHN_LOOS - 1 */
+ /* XXX - Should we allow SHN_XINDEX as a valid index here ? */
+ return (index >= SHN_LOPROC && index <= SHN_HIOS);
+}
+
/* Check to see if the file associated with ABFD matches the target vector
that ABFD points to.
Note that we may be called several times with the same ABFD, but different
target vectors, most of which will not match. We have to avoid leaving
any side effects in ABFD, or any data it points to (like tdata), if the
- file does not match the target vector.
+ file does not match the target vector. */
- FIXME: There is memory leak if we are called more than once with the same
- ABFD, and that bfd already has tdata allocated, since we allocate more tdata
- and the old tdata is orphaned. Since it's in the bfd obstack, there isn't
- much we can do about this except possibly rewrite the code. There are
- also other bfd_allocs that may be the source of memory leaks as well. */
-
-bfd_target *
-DEFUN (elf_object_p, (abfd), bfd * abfd)
+const bfd_target *
+elf_object_p (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_shdr; /* Section header table entry, external 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);
+ const struct elf_backend_data *ebd;
+ 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))
- goto got_system_call;
+ if (bfd_bread (&x_ehdr, sizeof (x_ehdr), abfd) != sizeof (x_ehdr))
+ {
+ if (bfd_get_error () != bfd_error_system_call)
+ goto got_wrong_format_error;
+ else
+ goto got_no_match;
+ }
/* 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
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 */
goto got_wrong_format_error;
}
+ if (!bfd_preserve_save (abfd, &preserve))
+ goto got_no_match;
+
/* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. FIXME: memory leak, see above. */
+ 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)
- goto got_no_memory_error;
+ if (! (*abfd->xvec->_bfd_set_format[bfd_object]) (abfd))
+ goto got_no_match;
+ preserve.marker = elf_tdata (abfd);
/* 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
+ /* As a simple sanity check, verify that 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))
{
- bfd_target **target_ptr;
+ const bfd_target * const *target_ptr;
if (ebd->elf_machine_code != EM_NONE)
goto got_wrong_format_error;
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;
+ const 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)
+ back = (const struct elf_backend_data *) (*target_ptr)->backend_data;
+ 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. */
}
}
-
- /* Set the flags and architecture before calling the backend so that
- it can override them. */
if (i_ehdrp->e_type == ET_EXEC)
abfd->flags |= EXEC_P;
else if (i_ehdrp->e_type == ET_DYN)
abfd->flags |= DYNAMIC;
- bfd_default_set_arch_mach (abfd, ebd->arch, 0);
+ if (i_ehdrp->e_phnum > 0)
+ abfd->flags |= D_PAGED;
- /* Remember the entry point specified in the ELF file header. */
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ if (! bfd_default_set_arch_mach (abfd, ebd->arch, 0))
+ {
+ /* It's OK if this fails for the generic target. */
+ if (ebd->elf_machine_code != EM_NONE)
+ goto got_no_match;
+ }
- /* Let the backend double check the format and override global
- information. */
- if (ebd->elf_backend_object_p)
+ if (i_ehdrp->e_shoff != 0)
{
- if ((*ebd->elf_backend_object_p) (abfd) == false)
+ bfd_signed_vma where = i_ehdrp->e_shoff;
+
+ if (where != (file_ptr) where)
goto got_wrong_format_error;
+
+ /* Seek to the section header table in the file. */
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+ goto got_no_match;
+
+ /* Read the first section header at index 0, and convert to internal
+ form. */
+ if (bfd_bread (&x_shdr, 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;
+ if (i_ehdrp->e_shnum != i_shdr.sh_size
+ || i_ehdrp->e_shnum == 0)
+ goto got_wrong_format_error;
+ }
+
+ /* And similarly for the string table index. */
+ if (i_ehdrp->e_shstrndx == SHN_XINDEX)
+ {
+ i_ehdrp->e_shstrndx = i_shdr.sh_link;
+ if (i_ehdrp->e_shstrndx != i_shdr.sh_link)
+ goto got_wrong_format_error;
+ }
+
+ /* Sanity check that we can read all of the section headers.
+ It ought to be good enough to just read the last one. */
+ if (i_ehdrp->e_shnum != 1)
+ {
+ /* Check that we don't have a totally silly number of sections. */
+ if (i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (x_shdr)
+ || i_ehdrp->e_shnum > (unsigned int) -1 / sizeof (i_shdr))
+ goto got_wrong_format_error;
+
+ where += (i_ehdrp->e_shnum - 1) * sizeof (x_shdr);
+ if (where != (file_ptr) where)
+ goto got_wrong_format_error;
+ if ((bfd_size_type) where <= i_ehdrp->e_shoff)
+ goto got_wrong_format_error;
+
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+ goto got_no_match;
+ if (bfd_bread (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
+ goto got_no_match;
+
+ /* Back to where we were. */
+ where = i_ehdrp->e_shoff + sizeof (x_shdr);
+ if (bfd_seek (abfd, (file_ptr) where, SEEK_SET) != 0)
+ goto got_no_match;
+ }
}
-
+
/* 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) == -1)
- goto got_system_call;
- for (shindex = 0; shindex < i_ehdrp->e_shnum; shindex++)
- {
- if (bfd_read ((PTR) & x_shdr, sizeof x_shdr, 1, abfd) != sizeof (x_shdr))
- goto got_system_call;
- elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
- elf_elfsections(abfd)[shindex] = i_shdrp + shindex;
-
- /* If this is a .dynamic section, mark the object file as being
- dynamically linked. */
- if (i_shdrp[shindex].sh_type == SHT_DYNAMIC)
- abfd->flags |= DYNAMIC;
+ internal form. */
+ if (i_ehdrp->e_shnum != 0)
+ {
+ Elf_Internal_Shdr *shdrp;
+ unsigned int num_sec;
+
+ amt = sizeof (*i_shdrp) * i_ehdrp->e_shnum;
+ i_shdrp = 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) = bfd_alloc (abfd, amt);
+ if (!elf_elfsections (abfd))
+ goto got_no_match;
+
+ 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 (&x_shdr, sizeof x_shdr, abfd) != sizeof (x_shdr))
+ goto got_no_match;
+ elf_swap_shdr_in (abfd, &x_shdr, i_shdrp + shindex);
+
+ /* Sanity check sh_link and sh_info. */
+ if (! valid_section_index_p (i_shdrp[shindex].sh_link, num_sec))
+ goto got_wrong_format_error;
+
+ if (((i_shdrp[shindex].sh_flags & SHF_INFO_LINK)
+ || i_shdrp[shindex].sh_type == SHT_RELA
+ || i_shdrp[shindex].sh_type == SHT_REL)
+ && ! valid_section_index_p (i_shdrp[shindex].sh_info, num_sec))
+ goto got_wrong_format_error;
+
+ /* 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->minpagesize)
+ != 0))
+ abfd->flags &= ~D_PAGED;
+ }
}
- if (i_ehdrp->e_shstrndx)
+
+ /* A further sanity check. */
+ if (i_ehdrp->e_shnum != 0)
{
- bfd_section_from_shdr (abfd, i_ehdrp->e_shstrndx);
+ if (! valid_section_index_p (i_ehdrp->e_shstrndx, elf_numsections (abfd)))
+ {
+ /* PR 2257:
+ We used to just goto got_wrong_format_error here
+ but there are binaries in existance for which this test
+ will prevent the binutils from working with them at all.
+ So we are kind, and reset the string index value to 0
+ so that at least some processing can be done. */
+ i_ehdrp->e_shstrndx = SHN_UNDEF;
+ _bfd_error_handler (_("warning: %s has a corrupt string table index - ignoring"), abfd->filename);
+ }
}
+ else if (i_ehdrp->e_shstrndx != SHN_UNDEF)
+ goto got_wrong_format_error;
+
+ /* 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 = 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;
- /* Read in the string table containing the names of the sections. We
- 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.) */
+ if (bfd_bread (&x_phdr, sizeof x_phdr, abfd) != sizeof x_phdr)
+ goto got_no_match;
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdr);
+ }
+ }
- shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
- if (!shstrtab)
- goto got_wrong_format_error;
+ if (i_ehdrp->e_shstrndx != 0 && i_ehdrp->e_shoff != 0)
+ {
+ unsigned int num_sec;
- /* 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.
+ /* 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;
+ }
- We also watch for the symbol table section and remember the file
- offset and section size for both the symbol table section and the
- associated string table section. */
+ /* Set up ELF sections for SHF_GROUP and SHF_LINK_ORDER. */
+ if (! _bfd_elf_setup_sections (abfd))
+ goto got_wrong_format_error;
+ }
- for (shindex = 1; shindex < i_ehdrp->e_shnum; shindex++)
+ /* Let the backend double check the format and override global
+ information. */
+ if (ebd->elf_backend_object_p)
{
- bfd_section_from_shdr (abfd, shindex);
+ if (! (*ebd->elf_backend_object_p) (abfd))
+ goto got_wrong_format_error;
}
- return (abfd->xvec);
+ /* Remember the entry point specified in the ELF file header. */
+ bfd_set_start_address (abfd, i_ehdrp->e_entry);
+
+ /* 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;
+ }
+ }
- /* If we are going to use goto's to avoid duplicating error setting
- and return(NULL) code, then this at least makes it more maintainable. */
+ bfd_preserve_finish (abfd, &preserve);
+ return abfd->xvec;
- got_system_call:
- bfd_set_error (bfd_error_system_call);
- goto got_no_match;
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:
- elf_tdata (abfd) = preserved_tdata;
- return (NULL);
+ 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 *
-DEFUN (elf_symbol_from, (ignore_abfd, symbol),
- bfd * ignore_abfd AND
- asymbol * symbol)
-{
- if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
- return 0;
+/* Write out the relocs. */
- if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL)
- return 0;
+void
+elf_write_relocs (bfd *abfd, asection *sec, void *data)
+{
+ bfd_boolean *failedp = data;
+ Elf_Internal_Shdr *rela_hdr;
+ bfd_vma addr_offset;
+ void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *);
+ size_t extsize;
+ bfd_byte *dst_rela;
+ unsigned int idx;
+ asymbol *last_sym;
+ int last_sym_idx;
- return (elf_symbol_type *) symbol;
-}
+ /* If we have already failed, don't do anything. */
+ if (*failedp)
+ return;
-/* Create ELF output from BFD sections.
+ if ((sec->flags & SEC_RELOC) == 0)
+ return;
- Essentially, just create the section header and forget about the program
- header for now. */
+ /* The linker backend writes the relocs out itself, and sets the
+ reloc_count field to zero to inhibit writing them here. Also,
+ sometimes the SEC_RELOC flag gets set even when there aren't any
+ relocs. */
+ if (sec->reloc_count == 0)
+ return;
-static void
-DEFUN (elf_make_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
-{
- /* most of what is in bfd_shdr_from_section goes in here... */
- /* and all of these sections generate at *least* one ELF section. */
- Elf_Internal_Shdr *this_hdr;
- this_hdr = &elf_section_data (asect)->this_hdr;
+ /* If we have opened an existing file for update, reloc_count may be
+ set even though we are not linking. In that case we have nothing
+ to do. */
+ if (sec->orelocation == NULL)
+ return;
- this_hdr->sh_addr = asect->vma;
- this_hdr->sh_size = asect->_raw_size;
- /* contents already set by elf_set_section_contents */
+ rela_hdr = &elf_section_data (sec)->rel_hdr;
- if (asect->flags & SEC_RELOC)
+ rela_hdr->sh_size = rela_hdr->sh_entsize * sec->reloc_count;
+ rela_hdr->contents = bfd_alloc (abfd, rela_hdr->sh_size);
+ if (rela_hdr->contents == NULL)
{
- /* emit a reloc section, and thus strtab and symtab... */
- Elf_Internal_Shdr *rela_hdr;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- rela_hdr = &elf_section_data (asect)->rel_hdr;
+ *failedp = TRUE;
+ return;
+ }
- /* orelocation has the data, reloc_count has the count... */
- if (use_rela_p)
- {
- rela_hdr->sh_type = SHT_RELA;
- rela_hdr->sh_entsize = sizeof (Elf_External_Rela);
- }
- else
- /* REL relocations */
- {
- rela_hdr->sh_type = SHT_REL;
- rela_hdr->sh_entsize = sizeof (Elf_External_Rel);
- }
- rela_hdr->sh_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_offset = 0;
-
- /* FIXME: Systems I've checked use an alignment of 4, but it is
- possible that some systems use a different alignment. */
- rela_hdr->sh_addralign = 4;
-
- rela_hdr->size = 0;
- }
- if (asect->flags & SEC_ALLOC)
- {
- this_hdr->sh_flags |= SHF_ALLOC;
- if (asect->flags & SEC_LOAD)
- {
- /* @@ Do something with sh_type? */
- }
- }
- else
- {
- /* If this section is not part of the program image during
- execution, leave the address fields at 0. */
- this_hdr->sh_addr = 0;
- asect->vma = 0;
- }
- if (!(asect->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
-
- if (asect->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
-}
-
-void
-write_relocs (abfd, sec, xxx)
- bfd *abfd;
- asection *sec;
- PTR xxx;
-{
- 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 */
-
- if ((sec->flags & SEC_RELOC) == 0)
- return;
- /* Flags are sometimes inconsistent. */
- if (sec->reloc_count == 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)
+ /* Figure out whether the relocations are RELA or REL relocations. */
+ if (rela_hdr->sh_type == SHT_RELA)
{
- bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
+ swap_out = elf_swap_reloca_out;
+ extsize = sizeof (Elf_External_Rela);
}
-
- /* orelocation has the data, reloc_count has the count... */
- if (use_rela_p)
+ else if (rela_hdr->sh_type == SHT_REL)
{
- outbound_relocas = (Elf_External_Rela *) rela_hdr->contents;
-
- 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;
-
- 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);
-
- dst_rela.r_addend = ptr->addend;
- elf_swap_reloca_out (abfd, &dst_rela, src_rela);
- }
+ swap_out = elf_swap_reloc_out;
+ extsize = sizeof (Elf_External_Rel);
}
else
- /* REL relocations */
- {
- outbound_relocs = (Elf_External_Rel *) rela_hdr->contents;
-
- for (idx = 0; idx < sec->reloc_count; idx++)
- {
- 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;
- last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
- }
- dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
-
- elf_swap_reloc_out (abfd, &dst_rel, src_rel);
- }
- }
-}
-
-static void
-fix_up_strtabs (abfd, asect, obj)
- bfd *abfd;
- asection *asect;
- PTR obj;
-{
- Elf_Internal_Shdr *this_hdr = &elf_section_data (asect)->this_hdr;
- int this_idx = elf_section_data(asect)->this_idx;
-
- /* @@ Check flags! */
- if (!strncmp (asect->name, ".stab", 5)
- && !strcmp ("str", asect->name + strlen (asect->name) - 3))
- {
- size_t len = strlen (asect->name) + 1;
- char *s = (char *) malloc (len);
- if (s == NULL)
- /* FIXME: Should deal more gracefully with errors. */
- abort ();
- strcpy (s, asect->name);
- s[len - 4] = 0;
- asect = bfd_get_section_by_name (abfd, s);
- free (s);
- if (!asect)
- abort ();
- elf_section_data(asect)->this_hdr.sh_link = this_idx;
- /* @@ Assuming 32 bits! */
- elf_section_data(asect)->this_hdr.sh_entsize = 0xc;
-
- this_hdr->sh_type = SHT_STRTAB;
- }
-}
-
-static void
-DEFUN (elf_fake_sections, (abfd, asect, obj),
- bfd * abfd AND
- asection * asect AND
- PTR obj)
-{
- /* most of what is in bfd_shdr_from_section goes in here... */
- /* and all of these sections generate at *least* one ELF section. */
-
- Elf_Internal_Shdr *this_hdr;
- this_hdr = &elf_section_data (asect)->this_hdr;
- this_hdr->sh_name =
- bfd_add_to_strtab (abfd, elf_shstrtab (abfd), asect->name);
- /* We need to log the type *now* so that elf_section_from_bfd_section
- can find us... have to set rawdata too. */
- this_hdr->rawdata = (void *) asect;
- this_hdr->sh_addralign = 1 << asect->alignment_power;
- if ((asect->flags & SEC_ALLOC) && (asect->flags & SEC_LOAD))
- this_hdr->sh_type = SHT_PROGBITS;
- else if ((asect->flags & SEC_ALLOC) && ((asect->flags & SEC_LOAD) == 0))
- {
- BFD_ASSERT (strcmp (asect->name, ".bss") == 0
- || strcmp (asect->name, ".sbss") == 0);
- this_hdr->sh_type = SHT_NOBITS;
- }
- /* FIXME I am not sure how to detect a .note section from the flags
- word of an `asection'. */
- else if (!strcmp (asect->name, ".note"))
- this_hdr->sh_type = SHT_NOTE;
- else
- this_hdr->sh_type = SHT_PROGBITS;
-
- this_hdr->sh_flags = 0;
- this_hdr->sh_addr = 0;
- this_hdr->sh_size = 0;
- this_hdr->sh_entsize = 0;
- this_hdr->sh_info = 0;
- this_hdr->sh_link = 0;
- this_hdr->sh_offset = 0;
- this_hdr->size = 0;
-
- /* Now, check for processor-specific section types. */
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (bed->elf_backend_fake_sections)
- (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
- }
-
- {
- /* Emit a strtab and symtab, and possibly a reloc section. */
- Elf_Internal_Shdr *rela_hdr;
-
- /* Note that only one symtab is used, so just remember it
- for now. */
-
- if (asect->flags & SEC_RELOC)
- {
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- rela_hdr = &elf_section_data (asect)->rel_hdr;
- rela_hdr->sh_name =
- bfd_add_2_to_strtab (abfd, elf_shstrtab (abfd),
- use_rela_p ? ".rela" : ".rel",
- asect->name);
- 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_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_size = 0;
- rela_hdr->sh_offset = 0;
-
- /* FIXME: Systems I've checked use an alignment of 4, but some
- systems may use a different alignment. */
- rela_hdr->sh_addralign = 4;
-
- rela_hdr->size = 0;
- }
- }
- if (asect->flags & SEC_ALLOC)
- {
- this_hdr->sh_flags |= SHF_ALLOC;
- if (asect->flags & SEC_LOAD)
- {
- /* @@ Do something with sh_type? */
- }
- }
- if (!(asect->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
- if (asect->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
-}
-
-/* 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 (sym->section == &bfd_und_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
-DEFUN (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;
- Elf_Sym_Extra *sym_extra;
- int idx;
- asection *asect;
-
-#ifdef DEBUG
- fprintf (stderr, "elf_map_symbols\n");
- fflush (stderr);
-#endif
-
- /* Add local symbols for each section for which there are relocs.
- FIXME: How can we tell which sections have relocs at this point?
- Will reloc_count always be accurate? Actually, I think most ELF
- targets create section symbols for all sections anyhow. */
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (max_index < asect->index)
- max_index = asect->index;
- }
-
- max_index++;
- elf_num_section_syms (abfd) = max_index;
- sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
- elf_section_syms (abfd) = sect_syms;
-
- if (sect_syms == 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- asymbol *sym = bfd_make_empty_symbol (abfd);
- if (!sym)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- sym->the_bfd = abfd;
- sym->name = asect->name;
- sym->value = asect->vma;
- sym->flags = BSF_SECTION_SYM;
- 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
- }
-
- if (num_sections)
- {
- if (syms)
- syms = (asymbol **) bfd_realloc (abfd, syms,
- ((symcount + num_sections + 1)
- * sizeof (asymbol *)));
- else
- syms = (asymbol **) bfd_alloc (abfd,
- (num_sections + 1) * sizeof (asymbol *));
- if (!syms)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (sect_syms[asect->index])
- syms[symcount++] = sect_syms[asect->index];
- }
-
- syms[symcount] = (asymbol *) 0;
- bfd_set_symtab (abfd, syms, symcount);
- }
-
- elf_sym_extra (abfd) = sym_extra
- = (Elf_Sym_Extra *) bfd_alloc (abfd, symcount * sizeof (Elf_Sym_Extra));
- if (!sym_extra)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- /* Identify and classify all of the symbols. */
- for (idx = 0; idx < symcount; idx++)
- {
- if (!sym_is_global (abfd, syms[idx]))
- num_locals++;
+ /* Every relocation section should be either an SHT_RELA or an
+ SHT_REL section. */
+ abort ();
+
+ /* 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;
+
+ /* orelocation has the data, reloc_count has the count... */
+ last_sym = 0;
+ last_sym_idx = 0;
+ dst_rela = rela_hdr->contents;
+
+ for (idx = 0; idx < sec->reloc_count; idx++, dst_rela += extsize)
+ {
+ 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
- num_globals++;
- }
-
- /* Now provide mapping information. Add +1 for skipping over the
- dummy symbol. */
- for (idx = 0; idx < symcount; idx++)
- {
- syms[idx]->udata = (PTR) &sym_extra[idx];
- if (!sym_is_global (abfd, syms[idx]))
- sym_extra[idx].elf_sym_num = 1 + num_locals2++;
- else
- sym_extra[idx].elf_sym_num = 1 + num_locals + num_globals2++;
- }
-
- elf_num_locals (abfd) = num_locals;
- elf_num_globals (abfd) = num_globals;
- return true;
-}
-
-static boolean assign_section_numbers ();
-static boolean assign_file_positions_except_relocs ();
-
-static boolean
-DEFUN (elf_compute_section_file_positions, (abfd), bfd * abfd)
-{
- bfd_map_over_sections (abfd, elf_fake_sections, 0);
-
- if (!assign_section_numbers (abfd))
- return false;
-
- bfd_map_over_sections (abfd, elf_make_sections, 0);
-
- bfd_map_over_sections (abfd, fix_up_strtabs, 0); /* .stab/.stabstr &c */
-
- if (swap_out_syms (abfd) == false)
- return false;
-
- if (!assign_file_positions_except_relocs (abfd))
- return false;
-
- return true;
-}
-
-static boolean
-DEFUN (elf_write_phdrs, (abfd, i_ehdrp, i_phdrp, phdr_cnt),
- bfd * abfd AND
- Elf_Internal_Ehdr * i_ehdrp AND
- Elf_Internal_Phdr * i_phdrp AND
- unsigned short phdr_cnt)
-{
- /* first program header entry goes after the file header */
- int outbase = i_ehdrp->e_phoff;
- unsigned int i;
- Elf_External_Phdr x_phdr;
-
- for (i = 0; i < phdr_cnt; i++)
- {
- elf_swap_phdr_out (abfd, i_phdrp + i, &x_phdr);
- bfd_seek (abfd, outbase, SEEK_SET);
- bfd_write ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd);
- outbase += sizeof (x_phdr);
- }
-
- return true;
-}
-
-static const Elf_Internal_Shdr null_shdr;
-
-/* 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. (Link pointers for .stab sections are
- not filled in here.) */
-static boolean
-assign_section_numbers (abfd)
- bfd *abfd;
-{
- struct elf_obj_tdata *t = elf_tdata (abfd);
- asection *sec;
- int section_number = 1;
- int i;
- Elf_Internal_Shdr **i_shdrp;
-
- t->shstrtab_hdr.sh_size = elf_shstrtab(abfd)->length;
- t->shstrtab_hdr.contents = (void *) elf_shstrtab(abfd)->tab;
- shstrtab_length_fixed = 1;
-
- t->shstrtab_section = section_number++;
- elf_elfheader(abfd)->e_shstrndx = t->shstrtab_section;
- if (abfd->symcount)
- {
- t->symtab_section = section_number++;
- t->strtab_section = section_number++;
- 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);
- d->this_idx = section_number++;
- if (sec->flags & SEC_RELOC)
- {
- d->rel_idx = section_number++;
- d->rel_hdr.sh_link = t->symtab_section;
- d->rel_hdr.sh_info = d->this_idx;
- }
- else
- d->rel_idx = 0;
- /* No handling for per-section string tables currently. */
- }
- 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)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- elf_elfsections(abfd) = i_shdrp;
- for (i = 0; i < section_number; i++)
- i_shdrp[i] = 0;
-
- i_shdrp[0] = (Elf_Internal_Shdr *) &null_shdr;
- i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
- if (abfd->symcount)
- {
- i_shdrp[t->symtab_section] = &t->symtab_hdr;
- i_shdrp[t->strtab_section] = &t->strtab_hdr;
- }
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- struct bfd_elf_section_data *d = elf_section_data (sec);
- i_shdrp[d->this_idx] = &d->this_hdr;
- if (d->rel_idx)
- i_shdrp[d->rel_idx] = &d->rel_hdr;
- }
- /* Make sure we got everything.... */
- for (i = 0; i < section_number; i++)
- if (i_shdrp[i] == 0)
- abort ();
- return true;
-}
-
-static INLINE file_ptr
-assign_file_position_for_section (i_shdrp, offset)
- Elf_Internal_Shdr *i_shdrp;
- file_ptr offset;
-{
- int align;
-
- if (i_shdrp->sh_addralign != 0)
- align = i_shdrp->sh_addralign;
- else
- align = 1;
- i_shdrp->sh_offset = offset = BFD_ALIGN (offset, align);
- if (i_shdrp->rawdata != NULL)
- ((asection *) i_shdrp->rawdata)->filepos = offset;
- if (i_shdrp->sh_type != SHT_NOBITS)
- offset += i_shdrp->sh_size;
- return offset;
-}
-
-static INLINE file_ptr
-align_file_position (off)
- file_ptr off;
-{
- return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
-}
-
-static INLINE file_ptr
-assign_file_positions_for_symtab_and_strtabs (abfd, off)
- bfd *abfd;
- file_ptr off;
-{
- struct elf_obj_tdata *t = elf_tdata (abfd);
-
- off = align_file_position (off);
- off = assign_file_position_for_section (&t->symtab_hdr, off);
- off = assign_file_position_for_section (&t->shstrtab_hdr, off);
- off = assign_file_position_for_section (&t->strtab_hdr, off);
- return off;
-}
-
-struct seg_info {
- bfd_vma low, mem_size;
- file_ptr file_size;
- int start_pos;
- int sh_flags;
- struct seg_info *next;
-};
-
-static boolean
-map_program_segments (abfd)
- bfd *abfd;
-{
- Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd);
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- Elf_Internal_Shdr *i_shdrp;
- Elf_Internal_Phdr *phdr;
- char *done = NULL;
- unsigned int i, n_left = 0;
- file_ptr lowest_offset = 0;
- struct seg_info *seg = NULL;
-
- done = (char *) malloc (i_ehdrp->e_shnum);
- if (done == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- memset (done, 0, i_ehdrp->e_shnum);
- for (i = 1; i < i_ehdrp->e_shnum; i++)
- {
- i_shdrp = i_shdrpp[i];
- /* If it's going to be mapped in, it's been assigned a position. */
- if (i_shdrp->sh_offset + 1 == 0)
- {
- /* Well, not really, but we won't process it here. */
- done[i] = 1;
- continue;
- }
- if (i_shdrp->sh_offset < lowest_offset
- || lowest_offset == 0)
- lowest_offset = i_shdrp->sh_offset;
- /* Only interested in PROGBITS or NOBITS for generating segments. */
- switch (i_shdrp->sh_type)
- {
- case SHT_PROGBITS:
- case SHT_NOBITS:
- break;
- default:
- done[i] = 1;
- }
- if (!done[i])
- n_left++;
- }
- while (n_left)
- {
- bfd_vma lowest_vma = -1, high;
- int low_sec = 0;
- int mem_size;
- int file_size = 0;
- struct seg_info *snew;
- struct seg_info **s_ptr;
-
- for (i = 1; i < i_ehdrp->e_shnum; i++)
- {
- i_shdrp = i_shdrpp[i];
- if (!done[i] && i_shdrp->sh_addr < lowest_vma)
- {
- lowest_vma = i_shdrp->sh_addr;
- low_sec = i;
- }
- }
- if (low_sec == 0)
- abort ();
- /* So now we know the lowest vma of any unassigned sections; start
- a segment there. */
- snew = (struct seg_info *) bfd_alloc (abfd, sizeof (struct seg_info));
- if (!snew)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- s_ptr = &seg;
- while (*s_ptr != (struct seg_info *) NULL)
- s_ptr = &(*s_ptr)->next;
- *s_ptr = snew;
- snew->next = NULL;
- snew->low = lowest_vma;
- i_shdrp = i_shdrpp[low_sec];
- snew->start_pos = i_shdrp->sh_offset;
- snew->sh_flags = i_shdrp->sh_flags;
- done[low_sec] = 1, n_left--;
- mem_size = i_shdrp->sh_size;
- high = lowest_vma + i_shdrp->sh_size;
-
- if (i_shdrp->sh_type == SHT_PROGBITS)
- file_size = i_shdrp->sh_size;
-
- for (i = 1; i < i_ehdrp->e_shnum; i++)
- {
- file_ptr f1;
-
- if (done[i])
- continue;
- i_shdrp = i_shdrpp[i];
- /* position of next byte on disk */
- f1 = snew->start_pos + file_size;
- if (i_shdrp->sh_type == SHT_PROGBITS)
- {
- if (i_shdrp->sh_offset - f1 != i_shdrp->sh_addr - high)
- continue;
- if (file_size != mem_size)
- break;
- }
- else /* sh_type == NOBITS */
- {
- /* If the section in question has no contents in the disk
- file, we really don't care where it supposedly starts.
- But we don't want to bother merging it into this segment
- if it doesn't start on this memory page. */
- bfd_vma page1, page2;
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
-
- /* page number in address space of current end of snew */
- page1 = (high - 1 + maxpagesize - 1) / maxpagesize;
- /* page number in address space of start of this section */
- page2 = (i_shdrp->sh_addr + maxpagesize - 1) / maxpagesize;
-
- if (page1 != page2)
- continue;
- }
- done[i] = 1, n_left--;
- if (i_shdrp->sh_type == SHT_PROGBITS)
- file_size = i_shdrp->sh_offset + i_shdrp->sh_size - snew->start_pos;
- mem_size = i_shdrp->sh_addr + i_shdrp->sh_size - snew->low;
- high = i_shdrp->sh_addr + i_shdrp->sh_size;
- i = 0;
- }
- snew->file_size = file_size;
- snew->mem_size = mem_size;
- }
- /* Now do something with the list of segments we've built up. */
- {
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
- struct seg_info *s;
- int n_segs = 0;
- int sz;
-
- for (s = seg; s; s = s->next)
- {
- n_segs++;
- }
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
- sz = sizeof (Elf_External_Phdr) * n_segs;
- if (align_file_position (i_ehdrp->e_ehsize) + sz <= lowest_offset)
- i_ehdrp->e_phoff = align_file_position (i_ehdrp->e_ehsize);
- else
- {
- i_ehdrp->e_phoff = align_file_position (elf_tdata (abfd)->next_file_pos);
- elf_tdata (abfd)->next_file_pos = i_ehdrp->e_phoff + sz;
- }
- phdr = (Elf_Internal_Phdr*) bfd_alloc (abfd,
- n_segs * sizeof (Elf_Internal_Phdr));
- if (!phdr)
- {
- bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
- }
- elf_tdata (abfd)->phdr = phdr;
- while (seg)
- {
- phdr->p_type = PT_LOAD; /* only type we really support so far */
- phdr->p_offset = seg->start_pos;
- phdr->p_vaddr = seg->low;
- phdr->p_paddr = 0;
- phdr->p_filesz = seg->file_size;
- phdr->p_memsz = seg->mem_size;
- phdr->p_flags = PF_R;
- phdr->p_align = maxpagesize; /* ? */
- if (seg->sh_flags & SHF_WRITE)
- /* SysVr4 ELF docs say "data segments normally have read, write,
- and execute permissions." */
- phdr->p_flags |= (PF_W | PF_X);
- if (seg->sh_flags & SHF_EXECINSTR)
- phdr->p_flags |= PF_X;
- phdr++;
- seg = seg->next;
- }
- i_ehdrp->e_phnum = n_segs;
- }
- elf_write_phdrs (abfd, i_ehdrp, elf_tdata (abfd)->phdr, i_ehdrp->e_phnum);
- if (done != NULL)
- free (done);
- return true;
- error_return:
- if (done != NULL)
- free (done);
- return false;
-}
-
-static boolean
-assign_file_positions_except_relocs (abfd)
- bfd *abfd;
-{
- /* For now, we ignore the possibility of having program segments, which
- may require some alignment in the file. That'll require padding, and
- some interesting calculations to optimize file space usage.
-
- Also, since the application may change the list of relocations for
- a given section, we don't figure them in here. We'll put them at the
- end of the file, at positions computed during bfd_close.
-
- The order, for now: <ehdr> <shdr> <sec1> <sec2> <sec3> ... <rel1> ...
- or: <ehdr> <phdr> <sec1> <sec2> ... <shdr> <rel1> ... */
-
- struct elf_obj_tdata *t = elf_tdata (abfd);
- file_ptr off;
- unsigned int i;
- Elf_Internal_Shdr **i_shdrpp = elf_elfsections (abfd);
- Elf_Internal_Shdr *i_shdrp;
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- int exec_p = (abfd->flags & EXEC_P) != 0;
- bfd_vma maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
-
- /* Everything starts after the ELF file header. */
- off = i_ehdrp->e_ehsize;
-
- if (!exec_p)
- {
- /* Section headers. */
- off = align_file_position (off);
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
- off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
- }
- for (i = 1; i < i_ehdrp->e_shnum; i++)
- {
- /* The symtab and strtab sections are placed by
- assign_file_positions_for_symtab_and_strtabs. */
- if (i == t->symtab_section
- || i == t->strtab_section
- || i == t->shstrtab_section)
- continue;
-
- i_shdrp = i_shdrpp[i];
- if (i_shdrp->sh_type == SHT_REL || i_shdrp->sh_type == SHT_RELA)
- {
- i_shdrp->sh_offset = -1;
- continue;
- }
- if (exec_p)
- {
- if (maxpagesize == 0)
- maxpagesize = 1; /* make the arithmetic work */
- /* This isn't necessarily going to give the best packing, if the
- segments require padding between them, but since that isn't
- usually the case, this'll do. */
- if ((i_shdrp->sh_flags & SHF_ALLOC) == 0)
- {
- i_shdrp->sh_offset = -1;
- continue;
- }
- /* Blindly assume that the segments are ordered optimally. With
- the default LD script, they will be. */
- if (i_shdrp->sh_type != SHT_NOBITS)
- {
- /* need big unsigned type */
- bfd_vma addtl_off;
- addtl_off = i_shdrp->sh_addr - off;
- addtl_off = addtl_off % maxpagesize;
- if (addtl_off)
- {
- off += addtl_off;
- }
- }
- }
- off = assign_file_position_for_section (i_shdrp, off);
-
- if (exec_p
- && i_shdrp->sh_type == SHT_NOBITS
- && (i == i_ehdrp->e_shnum
- || i_shdrpp[i + 1]->sh_type != SHT_NOBITS))
- {
- /* Skip to the next page to ensure that when the file is
- loaded the bss section is loaded with zeroes. I don't
- know if this is required on all platforms, but it
- shouldn't really hurt. */
- off = BFD_ALIGN (off, maxpagesize);
- }
-
- if (exec_p
- && get_elf_backend_data(abfd)->maxpagesize > 1
- && i_shdrp->sh_type == SHT_PROGBITS
- && (i_shdrp->sh_flags & SHF_ALLOC)
- && (i_shdrp->sh_offset - i_shdrp->sh_addr) % get_elf_backend_data (abfd)->maxpagesize != 0)
- abort ();
- }
- if (exec_p)
- {
- elf_tdata (abfd)->next_file_pos = off;
- if (!map_program_segments (abfd))
- return false;
- off = elf_tdata (abfd)->next_file_pos;
-
- /* Section headers. */
- off = align_file_position (off);
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
-
- off = assign_file_positions_for_symtab_and_strtabs (abfd, off);
-
- for (i = 1; i < i_ehdrp->e_shnum; i++)
- {
- i_shdrp = i_shdrpp[i];
- if (i_shdrp->sh_offset + 1 == 0
- && i_shdrp->sh_type != SHT_REL
- && i_shdrp->sh_type != SHT_RELA)
- off = assign_file_position_for_section (i_shdrp, off);
- }
- }
- 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 strtab *shstrtab;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- shstrtab = bfd_new_strtab (abfd);
- if (!shstrtab)
- 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;
-
- i_ehdrp->e_type = (abfd->flags & EXEC_P) ? ET_EXEC : ET_REL;
- switch (bfd_get_arch (abfd))
- {
- case bfd_arch_unknown:
- i_ehdrp->e_machine = EM_NONE;
- break;
- case bfd_arch_sparc:
- i_ehdrp->e_machine = EM_SPARC;
- /* start-sanitize-v9 */
-#if ARCH_SIZE == 64
- i_ehdrp->e_machine = EM_SPARC64;
-#endif
- /* end-sanitize-v9 */
- 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_HPPA;
- 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 = bfd_add_to_strtab (abfd, shstrtab,
- ".symtab");
- elf_tdata (abfd)->strtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
- ".strtab");
- elf_tdata (abfd)->shstrtab_hdr.sh_name = bfd_add_to_strtab (abfd, shstrtab,
- ".shstrtab");
- return true;
-}
-
-static boolean
-swap_out_syms (abfd)
- bfd *abfd;
-{
- if (!elf_map_symbols (abfd))
- return false;
-
- /* Dump out the symtabs. */
- {
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- struct strtab *stt = bfd_new_strtab (abfd);
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- Elf_External_Sym *outbound_syms;
- int idx;
-
- if (!stt)
- 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;
-
- /* FIXME: Systems I've checked use 4 byte alignment for .symtab,
- but it is possible that there are systems which use a different
- alignment. */
- symtab_hdr->sh_addralign = 4;
-
- /* see assert in elf_fake_sections that supports this: */
- 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)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- /* 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);
- }
- for (idx = 0; idx < symcount; idx++)
- {
- Elf_Internal_Sym sym;
- bfd_vma value = syms[idx]->value;
-
- if (syms[idx]->flags & BSF_SECTION_SYM)
- /* Section symbols have no names. */
- sym.st_name = 0;
- else
- sym.st_name = bfd_add_to_strtab (abfd, stt, syms[idx]->name);
-
- 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;
- /* Should retrieve this from somewhere... */
- sym.st_value = 16;
- sym.st_shndx = elf_section_from_bfd_section (abfd,
- syms[idx]->section);
- }
- else
- {
- asection *sec = syms[idx]->section;
- elf_symbol_type *type_ptr;
- int shndx;
-
- if (sec->output_section)
- {
- value += sec->output_offset;
- sec = sec->output_section;
- }
- value += sec->vma;
- sym.st_value = value;
- type_ptr = elf_symbol_from (abfd, syms[idx]);
- 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 (syms[idx]->section == &bfd_und_section)
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, 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
- + elf_sym_extra (abfd)[idx].elf_sym_num));
- }
-
- symtab_hdr->contents = (PTR) outbound_syms;
- symstrtab_hdr->contents = (PTR) stt->tab;
- symstrtab_hdr->sh_size = stt->length;
- 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;
- symstrtab_hdr->size = 0;
- }
-
- /* put the strtab out too... */
- {
- Elf_Internal_Shdr *this_hdr;
-
- this_hdr = &elf_tdata(abfd)->shstrtab_hdr;
- this_hdr->contents = (PTR) elf_shstrtab (abfd)->tab;
- this_hdr->sh_size = elf_shstrtab (abfd)->length;
- this_hdr->sh_type = SHT_STRTAB;
- this_hdr->sh_flags = 0;
- this_hdr->sh_addr = 0;
- this_hdr->sh_entsize = 0;
- this_hdr->sh_addralign = 1;
- this_hdr->size = 0;
- }
- 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;
- struct strtab *shstrtab;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
- shstrtab = elf_shstrtab (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);
- bfd_seek (abfd, (file_ptr) 0, SEEK_SET);
- bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd);
-
- /* 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 (shstrtab->tab + i_shdrp[count]->sh_name, count,
- i_shdrp[count]);
-#endif
- elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
- }
- bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET);
- bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd);
- /* need to dump the string table too... */
-
- return true;
-}
-
-static void
-assign_file_positions_for_relocs (abfd)
- bfd *abfd;
-{
- file_ptr off = elf_tdata(abfd)->next_file_pos;
- unsigned int i;
- Elf_Internal_Shdr **shdrpp = elf_elfsections (abfd);
- Elf_Internal_Shdr *shdrp;
- for (i = 1; i < elf_elfheader(abfd)->e_shnum; i++)
- {
- shdrp = shdrpp[i];
- if (shdrp->sh_type != SHT_REL && shdrp->sh_type != SHT_RELA)
- continue;
- off = align_file_position (off);
- off = assign_file_position_for_section (shdrp, off);
- }
- elf_tdata(abfd)->next_file_pos = off;
-}
-
-boolean
-DEFUN (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;
-
- /* We don't know how to write dynamic objects. Specifically, we
- don't know how to construct the program header. */
- if ((abfd->flags & DYNAMIC) != 0)
- {
- fprintf (stderr, "Writing ELF dynamic objects is not supported\n");
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
-
- if (abfd->output_has_begun == false)
- {
- if (prep_headers (abfd) == false)
- return false;
- if (elf_compute_section_file_positions (abfd) == false)
- return false;
- abfd->output_has_begun = true;
- }
-
- 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)
{
- bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET);
- bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, 1,
- abfd);
- }
- }
-
- if (bed->elf_backend_final_write_processing)
- (*bed->elf_backend_final_write_processing) (abfd);
-
- return write_shdrs_and_ehdr (abfd);
-}
-
-/* Given an index of a section, retrieve a pointer to it. Note
- that for our purposes, sections are indexed by {1, 2, ...} with
- 0 being an illegal index. */
-
-/* In the original, each ELF section went into exactly one BFD
- section. This doesn't really make sense, so we need a real mapping.
- The mapping has to hide in the Elf_Internal_Shdr since asection
- doesn't have anything like a tdata field... */
-
-static struct sec *
-DEFUN (section_from_elf_index, (abfd, index),
- bfd * abfd AND
- unsigned int index)
-{
- /* @@ Is bfd_com_section really correct in all the places it could
- be returned from this routine? */
-
- if (index == SHN_ABS)
- return &bfd_com_section; /* not abs? */
- if (index == SHN_COMMON)
- return &bfd_com_section;
-
- if (index > elf_elfheader (abfd)->e_shnum)
- return 0;
-
- {
- Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[index];
-
- switch (hdr->sh_type)
- {
- /* ELF sections that map to BFD sections */
- case SHT_PROGBITS:
- case SHT_NOBITS:
- if (!hdr->rawdata)
- bfd_section_from_shdr (abfd, index);
- return (struct sec *) hdr->rawdata;
-
- default:
- return (struct sec *) &bfd_abs_section;
- }
- }
-}
-
-/* given a section, search the header to find them... */
-static int
-DEFUN (elf_section_from_bfd_section, (abfd, asect),
- bfd * abfd AND
- struct sec *asect)
-{
- Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
- int index;
- Elf_Internal_Shdr *hdr;
- int maxindex = elf_elfheader (abfd)->e_shnum;
-
- if (asect == &bfd_abs_section)
- return SHN_ABS;
- if (asect == &bfd_com_section)
- return SHN_COMMON;
- if (asect == &bfd_und_section)
- return SHN_UNDEF;
-
- for (index = 0; index < maxindex; index++)
- {
- hdr = i_shdrp[index];
- switch (hdr->sh_type)
- {
- /* ELF sections that map to BFD sections */
- case SHT_PROGBITS:
- case SHT_NOBITS:
- case SHT_NOTE:
- if (hdr->rawdata)
- {
- if (((struct sec *) (hdr->rawdata)) == asect)
- return index;
- }
- break;
-
- case SHT_STRTAB:
- /* fix_up_strtabs will generate STRTAB sections with names
- of .stab*str. */
- if (!strncmp (asect->name, ".stab", 5)
- && !strcmp ("str", asect->name + strlen (asect->name) - 3))
- {
- if (hdr->rawdata)
- {
- if (((struct sec *) (hdr->rawdata)) == asect)
- return index;
- }
- break;
+ last_sym = sym;
+ n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
+ if (n < 0)
+ {
+ *failedp = TRUE;
+ return;
}
- /* FALL THROUGH */
- default:
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (bed->elf_backend_section_from_bfd_section)
- {
- int retval;
+ last_sym_idx = n;
+ }
- retval = index;
- if ((*bed->elf_backend_section_from_bfd_section)
- (abfd, hdr, asect, &retval))
- return retval;
- }
- }
- break;
+ 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);
}
- return -1;
}
-/* given a symbol, return the bfd index for that symbol. */
-static int
-DEFUN (elf_symbol_from_bfd_symbol, (abfd, asym_ptr_ptr),
- bfd * abfd AND
- struct symbol_cache_entry **asym_ptr_ptr)
+/* Write out the program headers. */
+
+int
+elf_write_out_phdrs (bfd *abfd,
+ const Elf_Internal_Phdr *phdr,
+ unsigned int count)
{
- 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 == (PTR) 0
- && (flags & BSF_SECTION_SYM)
- && asym_ptr->section)
+ while (count--)
{
- 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 = elf_section_syms (abfd)[indx]->udata;
+ Elf_External_Phdr extphdr;
+ elf_swap_phdr_out (abfd, phdr, &extphdr);
+ if (bfd_bwrite (&extphdr, sizeof (Elf_External_Phdr), abfd)
+ != sizeof (Elf_External_Phdr))
+ return -1;
+ phdr++;
}
+ return 0;
+}
- if (asym_ptr->udata)
- idx = ((Elf_Sym_Extra *)asym_ptr->udata)->elf_sym_num;
- else
- {
- abort ();
- }
+/* Write out the section headers and the ELF file header. */
+
+bfd_boolean
+elf_write_shdrs_and_ehdr (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 DEBUG & 4
- {
+ 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);
+ amt = sizeof (x_ehdr);
+ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
+ || bfd_bwrite (&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 = bfd_alloc (abfd, amt);
+ if (!x_shdrp)
+ return FALSE;
- 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);
- }
+ for (count = 0; count < i_ehdrp->e_shnum; i_shdrp++, count++)
+ {
+#if DEBUG & 2
+ elf_debug_section (count, *i_shdrp);
#endif
+ elf_swap_shdr_out (abfd, *i_shdrp, x_shdrp + count);
+
+ 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 (x_shdrp, amt, abfd) != amt)
+ return FALSE;
+
+ /* need to dump the string table too... */
- return idx;
+ return TRUE;
}
-static boolean
-DEFUN (elf_slurp_symbol_table, (abfd, symptrs),
- bfd * abfd AND
- asymbol ** symptrs) /* Buffer for generated bfd symbols */
+long
+elf_slurp_symbol_table (bfd *abfd, asymbol **symptrs, bfd_boolean dynamic)
{
- Elf_Internal_Shdr *hdr = &elf_tdata(abfd)->symtab_hdr;
- long symcount; /* Number of external ELF symbols */
+ 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 i_sym;
- Elf_External_Sym *x_symp = NULL;
-
- /* this is only valid because there is only one symtab... */
- /* FIXME: This is incorrect, there may also be a dynamic symbol
- table which is a subset of the full symbol table. We either need
- to be prepared to read both (and merge them) or ensure that we
- only read the full symbol table. Currently we only get called to
- read the full symbol table. -fnf */
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ Elf_Internal_Sym *isymbuf = NULL;
+ Elf_External_Versym *xver;
+ Elf_External_Versym *xverbuf = NULL;
+ const struct elf_backend_data *ebd;
+ bfd_size_type amt;
/* Read each raw ELF symbol, converting from external ELF form to
internal ELF form, and then using the information to create a
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. */
+ build the caller's pointer vector. */
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ if (! dynamic)
{
- bfd_set_error (bfd_error_system_call);
- return false;
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ verhdr = NULL;
+ }
+ else
+ {
+ hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+ if (elf_dynversym (abfd) == 0)
+ verhdr = NULL;
+ else
+ 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))
+ {
+ if (!_bfd_elf_slurp_version_tables (abfd, FALSE))
+ return -1;
+ }
}
+ ebd = get_elf_backend_data (abfd);
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)
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
+ isymbuf = bfd_elf_get_elf_syms (abfd, hdr, symcount, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return -1;
- symbase = ((elf_symbol_type *)
- bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
+ amt = symcount;
+ amt *= sizeof (elf_symbol_type);
+ symbase = bfd_zalloc (abfd, amt);
if (symbase == (elf_symbol_type *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- sym = symbase;
+ goto error_return;
- /* Temporarily allocate room for the raw ELF symbols. */
- x_symp = ((Elf_External_Sym *)
- malloc (symcount * sizeof (Elf_External_Sym)));
- if (x_symp == 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);
- goto error_return;
+ (*_bfd_error_handler)
+ (_("%s: version count (%ld) does not match symbol count (%ld)"),
+ abfd->filename,
+ (long) (verhdr->sh_size / sizeof (Elf_External_Versym)),
+ symcount);
+
+ /* Slurp in the symbols without the version information,
+ since that is more helpful than just quitting. */
+ verhdr = NULL;
}
- if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
- != symcount * sizeof (Elf_External_Sym))
+ if (verhdr != NULL)
{
- bfd_set_error (bfd_error_system_call);
- goto error_return;
+ if (bfd_seek (abfd, verhdr->sh_offset, SEEK_SET) != 0)
+ goto error_return;
+
+ xverbuf = bfd_malloc (verhdr->sh_size);
+ if (xverbuf == NULL && verhdr->sh_size != 0)
+ goto error_return;
+
+ if (bfd_bread (xverbuf, verhdr->sh_size, abfd) != verhdr->sh_size)
+ goto error_return;
}
+
/* Skip first symbol, which is a null dummy. */
- for (i = 1; i < symcount; i++)
+ xver = xverbuf;
+ if (xver != NULL)
+ ++xver;
+ isymend = isymbuf + symcount;
+ for (isym = isymbuf + 1, sym = symbase; isym < isymend; isym++, sym++)
{
- 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
+ memcpy (&sym->internal_elf_sym, isym, sizeof (Elf_Internal_Sym));
sym->symbol.the_bfd = abfd;
- sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
- i_sym.st_name);
+ sym->symbol.name = bfd_elf_sym_name (abfd, hdr, isym, NULL);
- sym->symbol.value = i_sym.st_value;
+ sym->symbol.value = isym->st_value;
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERV)
+ if (isym->st_shndx == SHN_UNDEF)
+ {
+ sym->symbol.section = bfd_und_section_ptr;
+ }
+ else if (isym->st_shndx < SHN_LORESERVE
+ || isym->st_shndx > SHN_HIRESERVE)
{
- sym->symbol.section = section_from_elf_index (abfd,
- i_sym.st_shndx);
+ sym->symbol.section = bfd_section_from_elf_index (abfd,
+ isym->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)
+ else if (isym->st_shndx == SHN_ABS)
{
- sym->symbol.section = &bfd_abs_section;
+ sym->symbol.section = bfd_abs_section_ptr;
}
- else if (i_sym.st_shndx == SHN_COMMON)
+ else if (isym->st_shndx == SHN_COMMON)
{
- sym->symbol.section = &bfd_com_section;
+ 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;
+ sym->symbol.value = isym->st_size;
}
else
- sym->symbol.section = &bfd_abs_section;
+ sym->symbol.section = bfd_abs_section_ptr;
- sym->symbol.value -= sym->symbol.section->vma;
+ /* If this is a relocatable file, then the symbol value is
+ already section relative. */
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
+ sym->symbol.value -= sym->symbol.section->vma;
- switch (ELF_ST_BIND (i_sym.st_info))
+ switch (ELF_ST_BIND (isym->st_info))
{
case STB_LOCAL:
sym->symbol.flags |= BSF_LOCAL;
break;
case STB_GLOBAL:
- sym->symbol.flags |= BSF_GLOBAL;
+ if (isym->st_shndx != SHN_UNDEF && isym->st_shndx != SHN_COMMON)
+ sym->symbol.flags |= BSF_GLOBAL;
break;
case STB_WEAK:
sym->symbol.flags |= BSF_WEAK;
break;
}
- switch (ELF_ST_TYPE (i_sym.st_info))
+ switch (ELF_ST_TYPE (isym->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;
- }
-
- /* 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. */
-
- bfd_get_symcount (abfd) = symcount = sym - symbase;
-
- /* Fill in the user's symbol pointer vector if needed. */
- if (symptrs)
- {
- sym = symbase;
- while (symcount-- > 0)
- {
- *symptrs++ = &sym->symbol;
- sym++;
- }
- *symptrs = 0; /* Final null pointer */
- }
-
- if (x_symp != NULL)
- free (x_symp);
- return true;
- error_return:
- if (x_symp != NULL)
- free (x_symp);
- return false;
-}
-
-/* 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. */
-
-unsigned int
-DEFUN (elf_get_symtab_upper_bound, (abfd), bfd * abfd)
-{
- unsigned int symcount;
- unsigned int symtab_size = 0;
-
- 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;
-}
-
-/*
- This function return the number of bytes required to store the
- relocation information associated with section <<sect>>
- attached to bfd <<abfd>>
-
-*/
-unsigned int
-elf_get_reloc_upper_bound (abfd, asect)
- bfd *abfd;
- sec_ptr asect;
-{
- if (asect->flags & SEC_RELOC)
- {
- /* either rel or rela */
- return elf_section_data(asect)->rel_hdr.sh_size;
- }
- else
- return 0;
-}
-
-static boolean
-DEFUN (elf_slurp_reloca_table, (abfd, asect, symbols),
- bfd * abfd AND
- sec_ptr asect AND
- asymbol ** symbols)
-{
- Elf_External_Rela *native_relocs;
- arelent *reloc_cache;
- arelent *cache_ptr;
-
- unsigned int idx;
-
- if (asect->relocation)
- return true;
- if (asect->reloc_count == 0)
- return true;
- if (asect->flags & SEC_CONSTRUCTOR)
- return true;
-
- bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
- native_relocs = (Elf_External_Rela *)
- bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rela));
- if (!native_relocs)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- bfd_read ((PTR) native_relocs,
- sizeof (Elf_External_Rela), asect->reloc_count, abfd);
-
- reloc_cache = (arelent *)
- bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
-
- if (!reloc_cache)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (idx = 0; idx < asect->reloc_count; idx++)
- {
- Elf_Internal_Rela dst;
- Elf_External_Rela *src;
-
- cache_ptr = reloc_cache + idx;
- src = native_relocs + idx;
- elf_swap_reloca_in (abfd, src, &dst);
-
-#ifdef RELOC_PROCESSING
- RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
-#else
- if (asect->flags & SEC_RELOC)
- {
- /* relocatable, so the offset is off of the section */
- cache_ptr->address = dst.r_offset + asect->vma;
- }
- else
- {
- /* non-relocatable, so the offset a virtual address */
- cache_ptr->address = dst.r_offset;
- }
-
- /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
- of zero points to the dummy symbol, which was not read into
- the symbol table SYMBOLS. */
- if (ELF_R_SYM (dst.r_info) == 0)
- cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
- else
- {
- asymbol *s;
-
- cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
-
- /* Translate any ELF section symbol into a BFD section
- symbol. */
- s = *(cache_ptr->sym_ptr_ptr);
- if (s->flags & BSF_SECTION_SYM)
- {
- cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr;
- s = *cache_ptr->sym_ptr_ptr;
- if (s->name == 0 || s->name[0] == 0)
- abort ();
- }
- }
- cache_ptr->addend = dst.r_addend;
-
- /* Fill in the cache_ptr->howto field from dst.r_type */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- (*ebd->elf_info_to_howto) (abfd, cache_ptr, &dst);
- }
-#endif
- }
-
- asect->relocation = reloc_cache;
- return true;
-}
-
-#ifdef DEBUG
-static void
-elf_debug_section (str, num, hdr)
- char *str;
- int num;
- Elf_Internal_Shdr *hdr;
-{
- fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num, str, (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);
- fprintf (stderr, "rawdata = 0x%.8lx\n", (long) hdr->rawdata);
- fprintf (stderr, "contents = 0x%.8lx\n", (long) hdr->contents);
- fprintf (stderr, "size = %ld\n", (long) hdr->size);
- 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
-
-static boolean
-DEFUN (elf_slurp_reloc_table, (abfd, asect, symbols),
- bfd * abfd AND
- sec_ptr asect AND
- asymbol ** symbols)
-{
- Elf_External_Rel *native_relocs;
- arelent *reloc_cache;
- arelent *cache_ptr;
- Elf_Internal_Shdr *data_hdr;
- bfd_vma data_off;
- unsigned long data_max;
- char buf[4]; /* FIXME -- might be elf64 */
-
- unsigned int idx;
-
- if (asect->relocation)
- return true;
- if (asect->reloc_count == 0)
- return true;
- if (asect->flags & SEC_CONSTRUCTOR)
- return true;
-
- bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
- native_relocs = (Elf_External_Rel *)
- bfd_alloc (abfd, asect->reloc_count * sizeof (Elf_External_Rel));
- if (!native_relocs)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- bfd_read ((PTR) native_relocs,
- sizeof (Elf_External_Rel), asect->reloc_count, abfd);
-
- reloc_cache = (arelent *)
- bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
-
- if (!reloc_cache)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- /* Get the offset of the start of the segment we are relocating to read in
- the implicit addend. */
- data_hdr = &elf_section_data(asect)->this_hdr;
- data_off = data_hdr->sh_offset;
- data_max = data_hdr->sh_size - sizeof (buf) + 1;
-
-#if DEBUG & 2
- elf_debug_section ("data section", -1, data_hdr);
-#endif
-
- for (idx = 0; idx < asect->reloc_count; idx++)
- {
-#ifdef RELOC_PROCESSING
- Elf_Internal_Rel dst;
- Elf_External_Rel *src;
-
- cache_ptr = reloc_cache + idx;
- src = native_relocs + idx;
- elf_swap_reloc_in (abfd, src, &dst);
-
- RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
-#else
- Elf_Internal_Rel dst;
- Elf_External_Rel *src;
-
- cache_ptr = reloc_cache + idx;
- src = native_relocs + idx;
-
- elf_swap_reloc_in (abfd, src, &dst);
-
- if (asect->flags & SEC_RELOC)
- {
- /* relocatable, so the offset is off of the section */
- cache_ptr->address = dst.r_offset + asect->vma;
- }
- else
- {
- /* non-relocatable, so the offset a virtual address */
- cache_ptr->address = dst.r_offset;
- }
-
- /* ELF_R_SYM(dst.r_info) is the symbol table offset. An offset
- of zero points to the dummy symbol, which was not read into
- the symbol table SYMBOLS. */
- if (ELF_R_SYM (dst.r_info) == 0)
- cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
- else
- {
- asymbol *s;
-
- cache_ptr->sym_ptr_ptr = symbols + ELF_R_SYM (dst.r_info) - 1;
-
- /* Translate any ELF section symbol into a BFD section
- symbol. */
- s = *(cache_ptr->sym_ptr_ptr);
- if (s->flags & BSF_SECTION_SYM)
- {
- cache_ptr->sym_ptr_ptr = s->section->symbol_ptr_ptr;
- s = *cache_ptr->sym_ptr_ptr;
- if (s->name == 0 || s->name[0] == 0)
- abort ();
- }
- }
- BFD_ASSERT (dst.r_offset <= data_max);
- cache_ptr->addend = 0;
-
- /* Fill in the cache_ptr->howto field from dst.r_type */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- (*ebd->elf_info_to_howto_rel) (abfd, cache_ptr, &dst);
- }
-#endif
- }
-
- asect->relocation = reloc_cache;
- return true;
-}
-
-unsigned int
-elf_canonicalize_reloc (abfd, section, relptr, symbols)
- bfd *abfd;
- sec_ptr section;
- arelent **relptr;
- asymbol **symbols;
-{
- arelent *tblptr = section->relocation;
- unsigned int count = 0;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- /* snarfed from coffcode.h */
- if (use_rela_p)
- elf_slurp_reloca_table (abfd, section, symbols);
- else
- elf_slurp_reloc_table (abfd, section, symbols);
-
- tblptr = section->relocation;
- if (!tblptr)
- return 0;
-
- for (; count++ < section->reloc_count;)
- *relptr++ = tblptr++;
-
- *relptr = 0;
- return section->reloc_count;
-}
-
-unsigned int
-DEFUN (elf_get_symtab, (abfd, alocation),
- bfd * abfd AND
- asymbol ** alocation)
-{
-
- if (!elf_slurp_symbol_table (abfd, alocation))
- return 0;
- else
- return bfd_get_symcount (abfd);
-}
-
-asymbol *
-DEFUN (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
-DEFUN (elf_get_symbol_info, (ignore_abfd, symbol, ret),
- bfd * ignore_abfd AND
- asymbol * symbol AND
- symbol_info * ret)
-{
- bfd_symbol_info (symbol, ret);
-}
+ break;
+ case STT_FUNC:
+ sym->symbol.flags |= BSF_FUNCTION;
+ break;
+ case STT_OBJECT:
+ sym->symbol.flags |= BSF_OBJECT;
+ break;
+ case STT_TLS:
+ sym->symbol.flags |= BSF_THREAD_LOCAL;
+ break;
+ }
-void
-DEFUN (elf_print_symbol, (ignore_abfd, filep, symbol, how),
- bfd * ignore_abfd AND
- PTR filep AND
- asymbol * symbol AND
- bfd_print_symbol_type how)
-{
- FILE *file = (FILE *) filep;
- switch (how)
- {
- case bfd_print_symbol_name:
- fprintf (file, "%s", symbol->name);
- break;
- case bfd_print_symbol_more:
- fprintf (file, "elf ");
- fprintf_vma (file, symbol->value);
- fprintf (file, " %lx", (long) symbol->flags);
- break;
- case bfd_print_symbol_all:
- {
- CONST char *section_name;
- section_name = symbol->section ? symbol->section->name : "(*none*)";
- bfd_print_symbol_vandf ((PTR) file, symbol);
- fprintf (file, " %s\t%s",
- section_name,
- symbol->name);
- }
- break;
- }
+ if (dynamic)
+ sym->symbol.flags |= BSF_DYNAMIC;
-}
+ if (xver != NULL)
+ {
+ Elf_Internal_Versym iversym;
-alent *
-DEFUN (elf_get_lineno, (ignore_abfd, symbol),
- bfd * ignore_abfd AND
- asymbol * symbol)
-{
- fprintf (stderr, "elf_get_lineno unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
- return NULL;
-}
+ _bfd_elf_swap_versym_in (abfd, xver, &iversym);
+ sym->version = iversym.vs_vers;
+ xver++;
+ }
-boolean
-DEFUN (elf_set_arch_mach, (abfd, arch, machine),
- bfd * abfd AND
- enum bfd_architecture arch AND
- unsigned long machine)
-{
- /* Allow any architecture to be supported by the elf backend */
- switch (arch)
- {
- case bfd_arch_unknown: /* EM_NONE */
- case bfd_arch_sparc: /* EM_SPARC */
- case bfd_arch_i386: /* EM_386 */
- case bfd_arch_m68k: /* EM_68K */
- case bfd_arch_m88k: /* EM_88K */
- case bfd_arch_i860: /* EM_860 */
- case bfd_arch_mips: /* EM_MIPS (MIPS R3000) */
- case bfd_arch_hppa: /* EM_HPPA (HP PA_RISC) */
- case bfd_arch_powerpc: /* EM_CYGNUS_POWERPC */
- return bfd_default_set_arch_mach (abfd, arch, machine);
- default:
- return false;
+ /* Do some backend-specific processing on this symbol. */
+ if (ebd->elf_backend_symbol_processing)
+ (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
+ }
}
-}
-boolean
-DEFUN (elf_find_nearest_line, (abfd,
- section,
- symbols,
- offset,
- filename_ptr,
- functionname_ptr,
- line_ptr),
- bfd * abfd AND
- asection * section AND
- asymbol ** symbols AND
- bfd_vma offset AND
- CONST char **filename_ptr AND
- CONST char **functionname_ptr AND
- unsigned int *line_ptr)
-{
- 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);
-int
-DEFUN (elf_sizeof_headers, (abfd, reloc),
- bfd * abfd AND
- boolean reloc)
-{
- fprintf (stderr, "elf_sizeof_headers unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
- return 0;
-}
+ /* We rely on the zalloc to clear out the final symbol entry. */
-boolean
-DEFUN (elf_set_section_contents, (abfd, section, location, offset, count),
- bfd * abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
-{
- Elf_Internal_Shdr *hdr;
+ symcount = sym - symbase;
- if (abfd->output_has_begun == false) /* set by bfd.c handler? */
+ /* Fill in the user's symbol pointer vector if needed. */
+ if (symptrs)
{
- /* do setup calculations (FIXME) */
- if (prep_headers (abfd) == false)
- return false;
- if (elf_compute_section_file_positions (abfd) == false)
- return false;
- abfd->output_has_begun = true;
- }
+ long l = symcount;
- hdr = &elf_section_data(section)->this_hdr;
+ sym = symbase;
+ while (l-- > 0)
+ {
+ *symptrs++ = &sym->symbol;
+ sym++;
+ }
+ *symptrs = 0; /* Final null pointer */
+ }
- if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
- return false;
- if (bfd_write (location, 1, count, abfd) != count)
- return false;
+ 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;
}
-void
-DEFUN (elf_no_info_to_howto, (abfd, cache_ptr, dst),
- bfd * abfd AND
- arelent * cache_ptr AND
- Elf_Internal_Rela * dst)
-{
- fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
-}
+/* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
+ them. */
-void
-DEFUN (elf_no_info_to_howto_rel, (abfd, cache_ptr, dst),
- bfd * abfd AND
- arelent * cache_ptr AND
- Elf_Internal_Rel * dst)
+static bfd_boolean
+elf_slurp_reloc_table_from_section (bfd *abfd,
+ asection *asect,
+ Elf_Internal_Shdr *rel_hdr,
+ bfd_size_type reloc_count,
+ arelent *relents,
+ asymbol **symbols,
+ bfd_boolean dynamic)
{
- 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) /* Define away */
-#define bfd_fpregset(abfd, descdata, descsz, filepos) /* Define away */
-#define bfd_prpsinfo(abfd, descdata, descsz, filepos) /* Define away */
-#endif
+ const struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
+ void *allocated = NULL;
+ bfd_byte *native_relocs;
+ arelent *relent;
+ unsigned int i;
+ int entsize;
+ unsigned int symcount;
-#ifdef HAVE_PROCFS
+ allocated = bfd_malloc (rel_hdr->sh_size);
+ if (allocated == NULL)
+ goto error_return;
-static void
-DEFUN (bfd_prstatus, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
-{
- asection *newsect;
- prstatus_t *status = (prstatus_t *) 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;
- if (descsz == sizeof (prstatus_t))
- {
- newsect = bfd_make_section (abfd, ".reg");
- newsect->_raw_size = sizeof (status->pr_reg);
- newsect->filepos = filepos + (long) &status->pr_reg;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
- {
- memcpy (core_prstatus (abfd), descdata, descsz);
- }
- }
-}
+ native_relocs = allocated;
-/* Stash a copy of the prpsinfo structure away for future use. */
+ entsize = rel_hdr->sh_entsize;
+ BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
+ || entsize == sizeof (Elf_External_Rela));
-static void
-DEFUN (bfd_prpsinfo, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
-{
- asection *newsect;
+ if (dynamic)
+ symcount = bfd_get_dynamic_symcount (abfd);
+ else
+ symcount = bfd_get_symcount (abfd);
- if (descsz == sizeof (prpsinfo_t))
+ for (i = 0, relent = relents;
+ i < reloc_count;
+ i++, relent++, native_relocs += entsize)
{
- if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) != NULL)
+ Elf_Internal_Rela rela;
+
+ if (entsize == sizeof (Elf_External_Rela))
+ elf_swap_reloca_in (abfd, native_relocs, &rela);
+ else
+ elf_swap_reloc_in (abfd, native_relocs, &rela);
+
+ /* 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 (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)
{
- memcpy (core_prpsinfo (abfd), descdata, descsz);
+ (*_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;
}
- }
-}
-
-static void
-DEFUN (bfd_fpregset, (abfd, descdata, descsz, filepos),
- bfd * abfd AND
- char *descdata AND
- int descsz AND
- long filepos)
-{
- asection *newsect;
+ else
+ {
+ asymbol **ps;
- newsect = bfd_make_section (abfd, ".reg2");
- newsect->_raw_size = descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
-}
+ ps = symbols + ELF_R_SYM (rela.r_info) - 1;
-#endif /* HAVE_PROCFS */
+ relent->sym_ptr_ptr = ps;
+ }
-/* 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. */
+ relent->addend = rela.r_addend;
-char *
-DEFUN (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;
+ if ((entsize == sizeof (Elf_External_Rela)
+ && ebd->elf_info_to_howto != NULL)
+ || ebd->elf_info_to_howto_rel == NULL)
+ (*ebd->elf_info_to_howto) (abfd, relent, &rela);
+ else
+ (*ebd->elf_info_to_howto_rel) (abfd, relent, &rela);
}
-#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.
- */
+ if (allocated != NULL)
+ free (allocated);
-int
-DEFUN (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;
+ return TRUE;
+
+ error_return:
+ if (allocated != NULL)
+ free (allocated);
+ return FALSE;
}
-/* 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.
- */
+/* Read in and swap the external relocs. */
-boolean
-DEFUN (elf_core_file_matches_executable_p, (core_bfd, exec_bfd),
- bfd * core_bfd AND
- bfd * exec_bfd)
+bfd_boolean
+elf_slurp_reloc_table (bfd *abfd,
+ asection *asect,
+ asymbol **symbols,
+ bfd_boolean dynamic)
{
-#ifdef HAVE_PROCFS
- char *corename;
- char *execname;
-#endif
+ 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;
- /* First, xvecs must match since both are ELF files for the same target. */
+ if (asect->relocation != NULL)
+ return TRUE;
- if (core_bfd->xvec != exec_bfd->xvec)
+ if (! dynamic)
{
- bfd_set_error (bfd_error_system_call);
- return false;
- }
+ if ((asect->flags & SEC_RELOC) == 0
+ || asect->reloc_count == 0)
+ return TRUE;
-#ifdef HAVE_PROCFS
+ 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 no prpsinfo, just return true. Otherwise, grab the last component
- of the exec'd pathname from the prpsinfo. */
+ 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 (core_prpsinfo (core_bfd))
- {
- corename = (((struct prpsinfo *) core_prpsinfo (core_bfd))->pr_fname);
}
else
{
- return true;
- }
-
- /* Find the last component of the executable pathname. */
+ /* 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->size == 0)
+ return TRUE;
- if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
- {
- execname++;
- }
- else
- {
- execname = (char *) exec_bfd->filename;
+ rel_hdr = &d->this_hdr;
+ reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
+ rel_hdr2 = NULL;
+ reloc_count2 = 0;
}
- /* See if they match */
+ amt = (reloc_count + reloc_count2) * sizeof (arelent);
+ relents = bfd_alloc (abfd, amt);
+ if (relents == NULL)
+ return FALSE;
- return strcmp (execname, corename) ? false : true;
+ if (!elf_slurp_reloc_table_from_section (abfd, asect,
+ rel_hdr, reloc_count,
+ relents,
+ symbols, dynamic))
+ return FALSE;
-#else
+ if (rel_hdr2
+ && !elf_slurp_reloc_table_from_section (abfd, asect,
+ rel_hdr2, reloc_count2,
+ relents + reloc_count,
+ symbols, dynamic))
+ return FALSE;
- return true;
-
-#endif /* HAVE_PROCFS */
+ asect->relocation = relents;
+ return TRUE;
}
-/* 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
-DEFUN (elf_corefile_note, (abfd, hdr),
- bfd * abfd AND
- Elf_Internal_Phdr * hdr)
+#if DEBUG & 2
+static void
+elf_debug_section (int num, Elf_Internal_Shdr *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 */
- bfd_prstatus (abfd, descdata, i_note.descsz, filepos);
- sectname = ".prstatus";
- break;
- case NT_FPREGSET:
- /* process descdata as fpregset info */
- bfd_fpregset (abfd, descdata, i_note.descsz, filepos);
- sectname = ".fpregset";
- break;
- case NT_PRPSINFO:
- /* process descdata as prpsinfo */
- bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos);
- sectname = ".prpsinfo";
- break;
- default:
- /* Unknown descriptor, just ignore it. */
- sectname = NULL;
- break;
- }
- if (sectname != NULL)
- {
- newsect = bfd_make_section (abfd, sectname);
- 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;
-
+ 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);
}
+#endif
-/* 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).
-
- */
-
-bfd_target *
-DEFUN (elf_core_file_p, (abfd), bfd * abfd)
+#if DEBUG & 1
+static void
+elf_debug_file (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
+\f
+/* Create a new BFD as if by bfd_openr. Rather than opening a file,
+ reconstruct an ELF file by reading the segments out of remote memory
+ based on the ELF file header at EHDR_VMA and the ELF program headers it
+ points to. If not null, *LOADBASEP is filled in with the difference
+ between the VMAs from which the segments were read, and the VMAs the
+ file headers (and hence BFD's idea of each section's VMA) put them at.
+
+ The function TARGET_READ_MEMORY is called to copy LEN bytes from the
+ remote memory at target address VMA into the local buffer at MYADDR; it
+ should return zero on success or an `errno' code on failure. TEMPL must
+ be a BFD for a target with the word size and byte order found in the
+ remote memory. */
+
+bfd *
+NAME(_bfd_elf,bfd_from_remote_memory)
+ (bfd *templ,
+ bfd_vma ehdr_vma,
+ bfd_vma *loadbasep,
+ int (*target_read_memory) (bfd_vma, bfd_byte *, int))
{
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;
+ Elf_Internal_Ehdr i_ehdr; /* Elf file header, internal form */
+ Elf_External_Phdr *x_phdrs;
+ Elf_Internal_Phdr *i_phdrs, *last_phdr;
+ bfd *nbfd;
+ struct bfd_in_memory *bim;
+ int contents_size;
+ bfd_byte *contents;
+ int err;
+ unsigned int i;
+ bfd_vma loadbase;
/* Read in the ELF header in external format. */
-
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ err = target_read_memory (ehdr_vma, (bfd_byte *) &x_ehdr, sizeof x_ehdr);
+ if (err)
{
bfd_set_error (bfd_error_system_call);
+ errno = err;
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). */
+ and byte-swapping must match our XVEC entry. */
- if (elf_file_p (&x_ehdr) == false)
+ if (! elf_file_p (&x_ehdr)
+ || x_ehdr.e_ident[EI_VERSION] != EV_CURRENT
+ || x_ehdr.e_ident[EI_CLASS] != ELFCLASS)
{
- 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. */
+ /* Check that file's byte order matches xvec's */
switch (x_ehdr.e_ident[EI_DATA])
{
case ELFDATA2MSB: /* Big-endian */
- if (abfd->xvec->byteorder_big_p == false)
- goto wrong;
+ if (! bfd_header_big_endian (templ))
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
break;
case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->byteorder_big_p == true)
- goto wrong;
+ if (! bfd_header_little_endian (templ))
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
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);
+ bfd_set_error (bfd_error_wrong_format);
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
+ elf_swap_ehdr_in (templ, &x_ehdr, &i_ehdr);
- ebd = get_elf_backend_data (abfd);
+ /* The file header tells where to find the program headers.
+ These are what we use to actually choose what to read. */
- /* Check that the ELF e_machine field matches what this particular
- BFD format expects. */
- if (ebd->elf_machine_code != i_ehdrp->e_machine)
+ if (i_ehdr.e_phentsize != sizeof (Elf_External_Phdr) || i_ehdr.e_phnum == 0)
{
- bfd_target **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;
- }
- }
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
}
- /* 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)
+ x_phdrs = bfd_malloc (i_ehdr.e_phnum * (sizeof *x_phdrs + sizeof *i_phdrs));
+ if (x_phdrs == NULL)
{
bfd_set_error (bfd_error_no_memory);
return NULL;
}
- if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+ err = target_read_memory (ehdr_vma + i_ehdr.e_phoff, (bfd_byte *) x_phdrs,
+ i_ehdr.e_phnum * sizeof x_phdrs[0]);
+ if (err)
{
+ free (x_phdrs);
bfd_set_error (bfd_error_system_call);
+ errno = err;
return NULL;
}
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+ i_phdrs = (Elf_Internal_Phdr *) &x_phdrs[i_ehdr.e_phnum];
+
+ contents_size = 0;
+ last_phdr = NULL;
+ loadbase = ehdr_vma;
+ for (i = 0; i < i_ehdr.e_phnum; ++i)
{
- if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
- != sizeof (x_phdr))
+ elf_swap_phdr_in (templ, &x_phdrs[i], &i_phdrs[i]);
+ /* IA-64 vDSO may have two mappings for one segment, where one mapping
+ is executable only, and one is read only. We must not use the
+ executable one. */
+ if (i_phdrs[i].p_type == PT_LOAD && (i_phdrs[i].p_flags & PF_R))
{
- bfd_set_error (bfd_error_system_call);
- return NULL;
+ bfd_vma segment_end;
+ segment_end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
+ + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
+ if (segment_end > (bfd_vma) contents_size)
+ contents_size = segment_end;
+
+ if ((i_phdrs[i].p_offset & -i_phdrs[i].p_align) == 0)
+ loadbase = ehdr_vma - (i_phdrs[i].p_vaddr & -i_phdrs[i].p_align);
+
+ last_phdr = &i_phdrs[i];
}
- elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+ }
+ if (last_phdr == NULL)
+ {
+ /* There were no PT_LOAD segments, so we don't have anything to read. */
+ free (x_phdrs);
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
}
- /* Once all of the program headers have been read and converted, we
- can start processing them. */
+ /* Trim the last segment so we don't bother with zeros in the last page
+ that are off the end of the file. However, if the extra bit in that
+ page includes the section headers, keep them. */
+ if ((bfd_vma) contents_size > last_phdr->p_offset + last_phdr->p_filesz
+ && (bfd_vma) contents_size >= (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ {
+ contents_size = last_phdr->p_offset + last_phdr->p_filesz;
+ if ((bfd_vma) contents_size < (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ contents_size = i_ehdr.e_shoff + i_ehdr.e_shnum * i_ehdr.e_shentsize;
+ }
+ else
+ contents_size = last_phdr->p_offset + last_phdr->p_filesz;
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+ /* Now we know the size of the whole image we want read in. */
+ contents = bfd_zmalloc (contents_size);
+ if (contents == NULL)
{
- bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
- if ((i_phdrp + phindex)->p_type == PT_NOTE)
- {
- elf_corefile_note (abfd, i_phdrp + phindex);
- }
+ free (x_phdrs);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ for (i = 0; i < i_ehdr.e_phnum; ++i)
+ /* IA-64 vDSO may have two mappings for one segment, where one mapping
+ is executable only, and one is read only. We must not use the
+ executable one. */
+ if (i_phdrs[i].p_type == PT_LOAD && (i_phdrs[i].p_flags & PF_R))
+ {
+ bfd_vma start = i_phdrs[i].p_offset & -i_phdrs[i].p_align;
+ bfd_vma end = (i_phdrs[i].p_offset + i_phdrs[i].p_filesz
+ + i_phdrs[i].p_align - 1) & -i_phdrs[i].p_align;
+ if (end > (bfd_vma) contents_size)
+ end = contents_size;
+ err = target_read_memory ((loadbase + i_phdrs[i].p_vaddr)
+ & -i_phdrs[i].p_align,
+ contents + start, end - start);
+ if (err)
+ {
+ free (x_phdrs);
+ free (contents);
+ bfd_set_error (bfd_error_system_call);
+ errno = err;
+ return NULL;
+ }
+ }
+ free (x_phdrs);
+
+ /* If the segments visible in memory didn't include the section headers,
+ then clear them from the file header. */
+ if ((bfd_vma) contents_size < (i_ehdr.e_shoff
+ + i_ehdr.e_shnum * i_ehdr.e_shentsize))
+ {
+ memset (&x_ehdr.e_shoff, 0, sizeof x_ehdr.e_shoff);
+ memset (&x_ehdr.e_shnum, 0, sizeof x_ehdr.e_shnum);
+ memset (&x_ehdr.e_shstrndx, 0, sizeof x_ehdr.e_shstrndx);
}
- /* Remember the entry point specified in the ELF file header. */
+ /* This will normally have been in the first PT_LOAD segment. But it
+ conceivably could be missing, and we might have just changed it. */
+ memcpy (contents, &x_ehdr, sizeof x_ehdr);
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+ /* Now we have a memory image of the ELF file contents. Make a BFD. */
+ bim = bfd_malloc (sizeof (struct bfd_in_memory));
+ if (bim == NULL)
+ {
+ free (contents);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ nbfd = _bfd_new_bfd ();
+ if (nbfd == NULL)
+ {
+ free (bim);
+ free (contents);
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ nbfd->filename = "<in-memory>";
+ nbfd->xvec = templ->xvec;
+ bim->size = contents_size;
+ bim->buffer = contents;
+ nbfd->iostream = bim;
+ nbfd->flags = BFD_IN_MEMORY;
+ nbfd->direction = read_direction;
+ nbfd->mtime = time (NULL);
+ nbfd->mtime_set = TRUE;
- return abfd->xvec;
+ if (loadbasep)
+ *loadbasep = loadbase;
+ return nbfd;
}
+\f
+#include "elfcore.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, LOG_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