diff options
Diffstat (limited to 'contrib/gdb/bfd/elf.c')
| -rw-r--r-- | contrib/gdb/bfd/elf.c | 3318 |
1 files changed, 0 insertions, 3318 deletions
diff --git a/contrib/gdb/bfd/elf.c b/contrib/gdb/bfd/elf.c deleted file mode 100644 index 981d3ee230915..0000000000000 --- a/contrib/gdb/bfd/elf.c +++ /dev/null @@ -1,3318 +0,0 @@ -/* ELF executable support for BFD. - Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc. - -This file is part of BFD, the Binary File Descriptor library. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -/* - -SECTION - ELF backends - - BFD support for ELF formats is being worked on. - Currently, the best supported back ends are for sparc and i386 - (running svr4 or Solaris 2). - - Documentation of the internals of the support code still needs - to be written. The code is changing quickly enough that we - haven't bothered yet. - */ - -#include "bfd.h" -#include "sysdep.h" -#include "bfdlink.h" -#include "libbfd.h" -#define ARCH_SIZE 0 -#include "elf-bfd.h" - -static INLINE struct elf_segment_map *make_mapping - PARAMS ((bfd *, asection **, unsigned int, unsigned int, boolean)); -static int elf_sort_sections PARAMS ((const PTR, const PTR)); -static boolean assign_file_positions_for_segments PARAMS ((bfd *)); -static boolean assign_file_positions_except_relocs PARAMS ((bfd *)); -static boolean prep_headers PARAMS ((bfd *)); -static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **)); -static boolean copy_private_bfd_data PARAMS ((bfd *, bfd *)); - -/* Standard ELF hash function. Do not change this function; you will - cause invalid hash tables to be generated. (Well, you would if this - were being used yet.) */ -unsigned long -bfd_elf_hash (name) - CONST unsigned char *name; -{ - unsigned long h = 0; - unsigned long g; - int ch; - - while ((ch = *name++) != '\0') - { - h = (h << 4) + ch; - if ((g = (h & 0xf0000000)) != 0) - { - h ^= g >> 24; - h &= ~g; - } - } - return h; -} - -/* Read a specified number of bytes at a specified offset in an ELF - file, into a newly allocated buffer, and return a pointer to the - buffer. */ - -static char * -elf_read (abfd, offset, size) - bfd * abfd; - long offset; - unsigned int size; -{ - char *buf; - - if ((buf = bfd_alloc (abfd, size)) == NULL) - return NULL; - if (bfd_seek (abfd, offset, SEEK_SET) == -1) - return NULL; - if (bfd_read ((PTR) buf, size, 1, abfd) != size) - { - if (bfd_get_error () != bfd_error_system_call) - bfd_set_error (bfd_error_file_truncated); - return NULL; - } - return buf; -} - -boolean -elf_mkobject (abfd) - bfd * abfd; -{ - /* this just does initialization */ - /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */ - elf_tdata (abfd) = (struct elf_obj_tdata *) - bfd_zalloc (abfd, sizeof (struct elf_obj_tdata)); - if (elf_tdata (abfd) == 0) - return false; - /* since everything is done at close time, do we need any - initialization? */ - - return true; -} - -char * -bfd_elf_get_str_section (abfd, shindex) - bfd * abfd; - unsigned int shindex; -{ - Elf_Internal_Shdr **i_shdrp; - char *shstrtab = NULL; - unsigned int offset; - unsigned int shstrtabsize; - - i_shdrp = elf_elfsections (abfd); - if (i_shdrp == 0 || i_shdrp[shindex] == 0) - return 0; - - shstrtab = (char *) i_shdrp[shindex]->contents; - if (shstrtab == NULL) - { - /* No cached one, attempt to read, and cache what we read. */ - offset = i_shdrp[shindex]->sh_offset; - shstrtabsize = i_shdrp[shindex]->sh_size; - shstrtab = elf_read (abfd, offset, shstrtabsize); - i_shdrp[shindex]->contents = (PTR) shstrtab; - } - return shstrtab; -} - -char * -bfd_elf_string_from_elf_section (abfd, shindex, strindex) - bfd * abfd; - unsigned int shindex; - unsigned int strindex; -{ - Elf_Internal_Shdr *hdr; - - if (strindex == 0) - return ""; - - hdr = elf_elfsections (abfd)[shindex]; - - if (hdr->contents == NULL - && bfd_elf_get_str_section (abfd, shindex) == NULL) - return NULL; - - return ((char *) hdr->contents) + strindex; -} - -/* Make a BFD section from an ELF section. We store a pointer to the - BFD section in the bfd_section field of the header. */ - -boolean -_bfd_elf_make_section_from_shdr (abfd, hdr, name) - bfd *abfd; - Elf_Internal_Shdr *hdr; - const char *name; -{ - asection *newsect; - flagword flags; - - if (hdr->bfd_section != NULL) - { - BFD_ASSERT (strcmp (name, - bfd_get_section_name (abfd, hdr->bfd_section)) == 0); - return true; - } - - newsect = bfd_make_section_anyway (abfd, name); - if (newsect == NULL) - return false; - - newsect->filepos = hdr->sh_offset; - - if (! bfd_set_section_vma (abfd, newsect, hdr->sh_addr) - || ! bfd_set_section_size (abfd, newsect, hdr->sh_size) - || ! bfd_set_section_alignment (abfd, newsect, - bfd_log2 (hdr->sh_addralign))) - return false; - - flags = SEC_NO_FLAGS; - if (hdr->sh_type != SHT_NOBITS) - flags |= SEC_HAS_CONTENTS; - if ((hdr->sh_flags & SHF_ALLOC) != 0) - { - flags |= SEC_ALLOC; - if (hdr->sh_type != SHT_NOBITS) - flags |= SEC_LOAD; - } - if ((hdr->sh_flags & SHF_WRITE) == 0) - flags |= SEC_READONLY; - if ((hdr->sh_flags & SHF_EXECINSTR) != 0) - flags |= SEC_CODE; - else if ((flags & SEC_LOAD) != 0) - flags |= SEC_DATA; - - /* The debugging sections appear to be recognized only by name, not - any sort of flag. */ - if (strncmp (name, ".debug", sizeof ".debug" - 1) == 0 - || strncmp (name, ".line", sizeof ".line" - 1) == 0 - || strncmp (name, ".stab", sizeof ".stab" - 1) == 0) - flags |= SEC_DEBUGGING; - - if (! bfd_set_section_flags (abfd, newsect, flags)) - return false; - - if ((flags & SEC_ALLOC) != 0) - { - Elf_Internal_Phdr *phdr; - unsigned int i; - - /* Look through the phdrs to see if we need to adjust the lma. */ - phdr = elf_tdata (abfd)->phdr; - for (i = 0; i < elf_elfheader (abfd)->e_phnum; i++, phdr++) - { - if (phdr->p_type == PT_LOAD - && phdr->p_paddr != 0 - && phdr->p_vaddr != phdr->p_paddr - && phdr->p_vaddr <= hdr->sh_addr - && phdr->p_vaddr + phdr->p_memsz >= hdr->sh_addr + hdr->sh_size) - { - newsect->lma += phdr->p_paddr - phdr->p_vaddr; - break; - } - } - } - - hdr->bfd_section = newsect; - elf_section_data (newsect)->this_hdr = *hdr; - - return true; -} - -/* -INTERNAL_FUNCTION - bfd_elf_find_section - -SYNOPSIS - struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name); - -DESCRIPTION - Helper functions for GDB to locate the string tables. - Since BFD hides string tables from callers, GDB needs to use an - internal hook to find them. Sun's .stabstr, in particular, - isn't even pointed to by the .stab section, so ordinary - mechanisms wouldn't work to find it, even if we had some. -*/ - -struct elf_internal_shdr * -bfd_elf_find_section (abfd, name) - bfd * abfd; - char *name; -{ - Elf_Internal_Shdr **i_shdrp; - char *shstrtab; - unsigned int max; - unsigned int i; - - i_shdrp = elf_elfsections (abfd); - if (i_shdrp != NULL) - { - shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx); - if (shstrtab != NULL) - { - max = elf_elfheader (abfd)->e_shnum; - for (i = 1; i < max; i++) - if (!strcmp (&shstrtab[i_shdrp[i]->sh_name], name)) - return i_shdrp[i]; - } - } - return 0; -} - -const char *const bfd_elf_section_type_names[] = { - "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB", - "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE", - "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM", -}; - -/* ELF relocs are against symbols. If we are producing relocateable - output, and the reloc is against an external symbol, and nothing - has given us any additional addend, the resulting reloc will also - be against the same symbol. In such a case, we don't want to - change anything about the way the reloc is handled, since it will - all be done at final link time. Rather than put special case code - into bfd_perform_relocation, all the reloc types use this howto - function. It just short circuits the reloc if producing - relocateable output against an external symbol. */ - -/*ARGSUSED*/ -bfd_reloc_status_type -bfd_elf_generic_reloc (abfd, - reloc_entry, - symbol, - data, - input_section, - output_bfd, - error_message) - bfd *abfd; - arelent *reloc_entry; - asymbol *symbol; - PTR data; - asection *input_section; - bfd *output_bfd; - char **error_message; -{ - if (output_bfd != (bfd *) NULL - && (symbol->flags & BSF_SECTION_SYM) == 0 - && (! reloc_entry->howto->partial_inplace - || reloc_entry->addend == 0)) - { - reloc_entry->address += input_section->output_offset; - return bfd_reloc_ok; - } - - return bfd_reloc_continue; -} - -/* Print out the program headers. */ - -boolean -_bfd_elf_print_private_bfd_data (abfd, farg) - bfd *abfd; - PTR farg; -{ - FILE *f = (FILE *) farg; - Elf_Internal_Phdr *p; - asection *s; - bfd_byte *dynbuf = NULL; - - p = elf_tdata (abfd)->phdr; - if (p != NULL) - { - unsigned int i, c; - - fprintf (f, "\nProgram Header:\n"); - c = elf_elfheader (abfd)->e_phnum; - for (i = 0; i < c; i++, p++) - { - const char *s; - char buf[20]; - - switch (p->p_type) - { - case PT_NULL: s = "NULL"; break; - case PT_LOAD: s = "LOAD"; break; - case PT_DYNAMIC: s = "DYNAMIC"; break; - case PT_INTERP: s = "INTERP"; break; - case PT_NOTE: s = "NOTE"; break; - case PT_SHLIB: s = "SHLIB"; break; - case PT_PHDR: s = "PHDR"; break; - default: sprintf (buf, "0x%lx", p->p_type); s = buf; break; - } - fprintf (f, "%8s off 0x", s); - fprintf_vma (f, p->p_offset); - fprintf (f, " vaddr 0x"); - fprintf_vma (f, p->p_vaddr); - fprintf (f, " paddr 0x"); - fprintf_vma (f, p->p_paddr); - fprintf (f, " align 2**%u\n", bfd_log2 (p->p_align)); - fprintf (f, " filesz 0x"); - fprintf_vma (f, p->p_filesz); - fprintf (f, " memsz 0x"); - fprintf_vma (f, p->p_memsz); - fprintf (f, " flags %c%c%c", - (p->p_flags & PF_R) != 0 ? 'r' : '-', - (p->p_flags & PF_W) != 0 ? 'w' : '-', - (p->p_flags & PF_X) != 0 ? 'x' : '-'); - if ((p->p_flags &~ (PF_R | PF_W | PF_X)) != 0) - fprintf (f, " %lx", p->p_flags &~ (PF_R | PF_W | PF_X)); - fprintf (f, "\n"); - } - } - - s = bfd_get_section_by_name (abfd, ".dynamic"); - if (s != NULL) - { - int elfsec; - unsigned long link; - bfd_byte *extdyn, *extdynend; - size_t extdynsize; - void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); - - fprintf (f, "\nDynamic Section:\n"); - - dynbuf = (bfd_byte *) bfd_malloc (s->_raw_size); - if (dynbuf == NULL) - goto error_return; - if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, (file_ptr) 0, - s->_raw_size)) - goto error_return; - - elfsec = _bfd_elf_section_from_bfd_section (abfd, s); - if (elfsec == -1) - goto error_return; - link = elf_elfsections (abfd)[elfsec]->sh_link; - - extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; - swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; - - extdyn = dynbuf; - extdynend = extdyn + s->_raw_size; - for (; extdyn < extdynend; extdyn += extdynsize) - { - Elf_Internal_Dyn dyn; - const char *name; - char ab[20]; - boolean stringp; - - (*swap_dyn_in) (abfd, (PTR) extdyn, &dyn); - - if (dyn.d_tag == DT_NULL) - break; - - stringp = false; - switch (dyn.d_tag) - { - default: - sprintf (ab, "0x%lx", (unsigned long) dyn.d_tag); - name = ab; - break; - - case DT_NEEDED: name = "NEEDED"; stringp = true; break; - case DT_PLTRELSZ: name = "PLTRELSZ"; break; - case DT_PLTGOT: name = "PLTGOT"; break; - case DT_HASH: name = "HASH"; break; - case DT_STRTAB: name = "STRTAB"; break; - case DT_SYMTAB: name = "SYMTAB"; break; - case DT_RELA: name = "RELA"; break; - case DT_RELASZ: name = "RELASZ"; break; - case DT_RELAENT: name = "RELAENT"; break; - case DT_STRSZ: name = "STRSZ"; break; - case DT_SYMENT: name = "SYMENT"; break; - case DT_INIT: name = "INIT"; break; - case DT_FINI: name = "FINI"; break; - case DT_SONAME: name = "SONAME"; stringp = true; break; - case DT_RPATH: name = "RPATH"; stringp = true; break; - case DT_SYMBOLIC: name = "SYMBOLIC"; break; - case DT_REL: name = "REL"; break; - case DT_RELSZ: name = "RELSZ"; break; - case DT_RELENT: name = "RELENT"; break; - case DT_PLTREL: name = "PLTREL"; break; - case DT_DEBUG: name = "DEBUG"; break; - case DT_TEXTREL: name = "TEXTREL"; break; - case DT_JMPREL: name = "JMPREL"; break; - } - - fprintf (f, " %-11s ", name); - if (! stringp) - fprintf (f, "0x%lx", (unsigned long) dyn.d_un.d_val); - else - { - const char *string; - - string = bfd_elf_string_from_elf_section (abfd, link, - dyn.d_un.d_val); - if (string == NULL) - goto error_return; - fprintf (f, "%s", string); - } - fprintf (f, "\n"); - } - - free (dynbuf); - dynbuf = NULL; - } - - return true; - - error_return: - if (dynbuf != NULL) - free (dynbuf); - return false; -} - -/* Display ELF-specific fields of a symbol. */ -void -bfd_elf_print_symbol (ignore_abfd, filep, symbol, how) - bfd *ignore_abfd; - PTR filep; - asymbol *symbol; - 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", section_name); - /* Print the "other" value for a symbol. For common symbols, - we've already printed the size; now print the alignment. - For other symbols, we have no specified alignment, and - we've printed the address; now print the size. */ - fprintf_vma (file, - (bfd_is_com_section (symbol->section) - ? ((elf_symbol_type *) symbol)->internal_elf_sym.st_value - : ((elf_symbol_type *) symbol)->internal_elf_sym.st_size)); - fprintf (file, " %s", symbol->name); - } - break; - } -} - -/* Create an entry in an ELF linker hash table. */ - -struct bfd_hash_entry * -_bfd_elf_link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; -{ - struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; - - /* Allocate the structure if it has not already been allocated by a - subclass. */ - if (ret == (struct elf_link_hash_entry *) NULL) - ret = ((struct elf_link_hash_entry *) - bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry))); - if (ret == (struct elf_link_hash_entry *) NULL) - return (struct bfd_hash_entry *) ret; - - /* Call the allocation method of the superclass. */ - ret = ((struct elf_link_hash_entry *) - _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, - table, string)); - if (ret != (struct elf_link_hash_entry *) NULL) - { - /* Set local fields. */ - ret->indx = -1; - ret->size = 0; - ret->dynindx = -1; - ret->dynstr_index = 0; - ret->weakdef = NULL; - ret->got_offset = (bfd_vma) -1; - ret->plt_offset = (bfd_vma) -1; - ret->linker_section_pointer = (elf_linker_section_pointers_t *)0; - ret->type = STT_NOTYPE; - /* Assume that we have been called by a non-ELF symbol reader. - This flag is then reset by the code which reads an ELF input - file. This ensures that a symbol created by a non-ELF symbol - reader will have the flag set correctly. */ - ret->elf_link_hash_flags = ELF_LINK_NON_ELF; - } - - return (struct bfd_hash_entry *) ret; -} - -/* Initialize an ELF linker hash table. */ - -boolean -_bfd_elf_link_hash_table_init (table, abfd, newfunc) - struct elf_link_hash_table *table; - bfd *abfd; - struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *, - struct bfd_hash_table *, - const char *)); -{ - table->dynamic_sections_created = false; - table->dynobj = NULL; - /* The first dynamic symbol is a dummy. */ - table->dynsymcount = 1; - table->dynstr = NULL; - table->bucketcount = 0; - table->needed = NULL; - return _bfd_link_hash_table_init (&table->root, abfd, newfunc); -} - -/* Create an ELF linker hash table. */ - -struct bfd_link_hash_table * -_bfd_elf_link_hash_table_create (abfd) - bfd *abfd; -{ - struct elf_link_hash_table *ret; - - ret = ((struct elf_link_hash_table *) - bfd_alloc (abfd, sizeof (struct elf_link_hash_table))); - if (ret == (struct elf_link_hash_table *) NULL) - return NULL; - - if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc)) - { - bfd_release (abfd, ret); - return NULL; - } - - return &ret->root; -} - -/* This is a hook for the ELF emulation code in the generic linker to - tell the backend linker what file name to use for the DT_NEEDED - entry for a dynamic object. The generic linker passes name as an - empty string to indicate that no DT_NEEDED entry should be made. */ - -void -bfd_elf_set_dt_needed_name (abfd, name) - bfd *abfd; - const char *name; -{ - if (bfd_get_flavour (abfd) == bfd_target_elf_flavour - && bfd_get_format (abfd) == bfd_object) - elf_dt_name (abfd) = name; -} - -/* Get the list of DT_NEEDED entries for a link. This is a hook for - the ELF emulation code. */ - -struct bfd_link_needed_list * -bfd_elf_get_needed_list (abfd, info) - bfd *abfd; - struct bfd_link_info *info; -{ - if (info->hash->creator->flavour != bfd_target_elf_flavour) - return NULL; - return elf_hash_table (info)->needed; -} - -/* Get the name actually used for a dynamic object for a link. This - is the SONAME entry if there is one. Otherwise, it is the string - passed to bfd_elf_set_dt_needed_name, or it is the filename. */ - -const char * -bfd_elf_get_dt_soname (abfd) - bfd *abfd; -{ - if (bfd_get_flavour (abfd) == bfd_target_elf_flavour - && bfd_get_format (abfd) == bfd_object) - return elf_dt_name (abfd); - return NULL; -} - -/* Allocate an ELF string table--force the first byte to be zero. */ - -struct bfd_strtab_hash * -_bfd_elf_stringtab_init () -{ - struct bfd_strtab_hash *ret; - - ret = _bfd_stringtab_init (); - if (ret != NULL) - { - bfd_size_type loc; - - loc = _bfd_stringtab_add (ret, "", true, false); - BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1); - if (loc == (bfd_size_type) -1) - { - _bfd_stringtab_free (ret); - ret = NULL; - } - } - return ret; -} - -/* ELF .o/exec file reading */ - -/* Create a new bfd section from an ELF section header. */ - -boolean -bfd_section_from_shdr (abfd, shindex) - bfd *abfd; - unsigned int shindex; -{ - Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex]; - Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd); - struct elf_backend_data *bed = get_elf_backend_data (abfd); - char *name; - - name = elf_string_from_elf_strtab (abfd, hdr->sh_name); - - switch (hdr->sh_type) - { - case SHT_NULL: - /* Inactive section. Throw it away. */ - return true; - - case SHT_PROGBITS: /* Normal section with contents. */ - case SHT_DYNAMIC: /* Dynamic linking information. */ - case SHT_NOBITS: /* .bss section. */ - case SHT_HASH: /* .hash section. */ - case SHT_NOTE: /* .note section. */ - return _bfd_elf_make_section_from_shdr (abfd, hdr, name); - - case SHT_SYMTAB: /* A symbol table */ - if (elf_onesymtab (abfd) == shindex) - return true; - - BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); - BFD_ASSERT (elf_onesymtab (abfd) == 0); - elf_onesymtab (abfd) = shindex; - elf_tdata (abfd)->symtab_hdr = *hdr; - elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->symtab_hdr; - abfd->flags |= HAS_SYMS; - - /* Sometimes a shared object will map in the symbol table. If - SHF_ALLOC is set, and this is a shared object, then we also - treat this section as a BFD section. We can not base the - decision purely on SHF_ALLOC, because that flag is sometimes - set in a relocateable object file, which would confuse the - linker. */ - if ((hdr->sh_flags & SHF_ALLOC) != 0 - && (abfd->flags & DYNAMIC) != 0 - && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) - return false; - - return true; - - case SHT_DYNSYM: /* A dynamic symbol table */ - if (elf_dynsymtab (abfd) == shindex) - return true; - - BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym); - BFD_ASSERT (elf_dynsymtab (abfd) == 0); - elf_dynsymtab (abfd) = shindex; - elf_tdata (abfd)->dynsymtab_hdr = *hdr; - elf_elfsections (abfd)[shindex] = hdr = &elf_tdata (abfd)->dynsymtab_hdr; - abfd->flags |= HAS_SYMS; - - /* Besides being a symbol table, we also treat this as a regular - section, so that objcopy can handle it. */ - return _bfd_elf_make_section_from_shdr (abfd, hdr, name); - - case SHT_STRTAB: /* A string table */ - if (hdr->bfd_section != NULL) - return true; - if (ehdr->e_shstrndx == shindex) - { - elf_tdata (abfd)->shstrtab_hdr = *hdr; - elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr; - return true; - } - { - unsigned int i; - - for (i = 1; i < ehdr->e_shnum; i++) - { - Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i]; - if (hdr2->sh_link == shindex) - { - if (! bfd_section_from_shdr (abfd, i)) - return false; - if (elf_onesymtab (abfd) == i) - { - elf_tdata (abfd)->strtab_hdr = *hdr; - elf_elfsections (abfd)[shindex] = - &elf_tdata (abfd)->strtab_hdr; - return true; - } - if (elf_dynsymtab (abfd) == i) - { - elf_tdata (abfd)->dynstrtab_hdr = *hdr; - elf_elfsections (abfd)[shindex] = hdr = - &elf_tdata (abfd)->dynstrtab_hdr; - /* We also treat this as a regular section, so - that objcopy can handle it. */ - break; - } -#if 0 /* Not handling other string tables specially right now. */ - hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */ - /* We have a strtab for some random other section. */ - newsect = (asection *) hdr2->bfd_section; - if (!newsect) - break; - hdr->bfd_section = newsect; - hdr2 = &elf_section_data (newsect)->str_hdr; - *hdr2 = *hdr; - elf_elfsections (abfd)[shindex] = hdr2; -#endif - } - } - } - - return _bfd_elf_make_section_from_shdr (abfd, hdr, name); - - case SHT_REL: - case SHT_RELA: - /* *These* do a lot of work -- but build no sections! */ - { - asection *target_sect; - Elf_Internal_Shdr *hdr2; - int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; - - /* For some incomprehensible reason Oracle distributes - libraries for Solaris in which some of the objects have - bogus sh_link fields. It would be nice if we could just - reject them, but, unfortunately, some people need to use - them. We scan through the section headers; if we find only - one suitable symbol table, we clobber the sh_link to point - to it. I hope this doesn't break anything. */ - if (elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_SYMTAB - && elf_elfsections (abfd)[hdr->sh_link]->sh_type != SHT_DYNSYM) - { - int scan; - int found; - - found = 0; - for (scan = 1; scan < ehdr->e_shnum; scan++) - { - if (elf_elfsections (abfd)[scan]->sh_type == SHT_SYMTAB - || elf_elfsections (abfd)[scan]->sh_type == SHT_DYNSYM) - { - if (found != 0) - { - found = 0; - break; - } - found = scan; - } - } - if (found != 0) - hdr->sh_link = found; - } - - /* Get the symbol table. */ - if (elf_elfsections (abfd)[hdr->sh_link]->sh_type == SHT_SYMTAB - && ! bfd_section_from_shdr (abfd, hdr->sh_link)) - return false; - - /* If this reloc section does not use the main symbol table we - don't treat it as a reloc section. BFD can't adequately - represent such a section, so at least for now, we don't - try. We just present it as a normal section. */ - if (hdr->sh_link != elf_onesymtab (abfd)) - return _bfd_elf_make_section_from_shdr (abfd, hdr, name); - - /* Don't allow REL relocations on a machine that uses RELA and - vice versa. */ - /* @@ Actually, the generic ABI does suggest that both might be - used in one file. But the four ABI Processor Supplements I - have access to right now all specify that only one is used on - each of those architectures. It's conceivable that, e.g., a - bunch of absolute 32-bit relocs might be more compact in REL - form even on a RELA machine... */ - BFD_ASSERT (use_rela_p - ? (hdr->sh_type == SHT_RELA - && hdr->sh_entsize == bed->s->sizeof_rela) - : (hdr->sh_type == SHT_REL - && hdr->sh_entsize == bed->s->sizeof_rel)); - - if (! bfd_section_from_shdr (abfd, hdr->sh_info)) - return false; - target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info); - if (target_sect == NULL) - return false; - - hdr2 = &elf_section_data (target_sect)->rel_hdr; - *hdr2 = *hdr; - elf_elfsections (abfd)[shindex] = hdr2; - target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize; - target_sect->flags |= SEC_RELOC; - target_sect->relocation = NULL; - target_sect->rel_filepos = hdr->sh_offset; - abfd->flags |= HAS_RELOC; - return true; - } - break; - - case SHT_SHLIB: - return true; - - default: - /* Check for any processor-specific section types. */ - { - if (bed->elf_backend_section_from_shdr) - (*bed->elf_backend_section_from_shdr) (abfd, hdr, name); - } - break; - } - - return true; -} - -/* Given an ELF section number, retrieve the corresponding BFD - section. */ - -asection * -bfd_section_from_elf_index (abfd, index) - bfd *abfd; - unsigned int index; -{ - BFD_ASSERT (index > 0 && index < SHN_LORESERVE); - if (index >= elf_elfheader (abfd)->e_shnum) - return NULL; - return elf_elfsections (abfd)[index]->bfd_section; -} - -boolean -_bfd_elf_new_section_hook (abfd, sec) - bfd *abfd; - asection *sec; -{ - struct bfd_elf_section_data *sdata; - - sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata)); - if (!sdata) - return false; - sec->used_by_bfd = (PTR) sdata; - memset (sdata, 0, sizeof (*sdata)); - return true; -} - -/* Create a new bfd section from an ELF program header. - - Since program segments have no names, we generate a synthetic name - of the form segment<NUM>, where NUM is generally the index in the - program header table. For segments that are split (see below) we - generate the names segment<NUM>a and segment<NUM>b. - - Note that some program segments may have a file size that is different than - (less than) the memory size. All this means is that at execution the - system must allocate the amount of memory specified by the memory size, - but only initialize it with the first "file size" bytes read from the - file. This would occur for example, with program segments consisting - of combined data+bss. - - To handle the above situation, this routine generates TWO bfd sections - for the single program segment. The first has the length specified by - the file size of the segment, and the second has the length specified - by the difference between the two sizes. In effect, the segment is split - into it's initialized and uninitialized parts. - - */ - -boolean -bfd_section_from_phdr (abfd, hdr, index) - bfd *abfd; - Elf_Internal_Phdr *hdr; - int index; -{ - asection *newsect; - char *name; - char namebuf[64]; - int split; - - split = ((hdr->p_memsz > 0) && - (hdr->p_filesz > 0) && - (hdr->p_memsz > hdr->p_filesz)); - sprintf (namebuf, split ? "segment%da" : "segment%d", index); - name = bfd_alloc (abfd, strlen (namebuf) + 1); - if (!name) - return false; - strcpy (name, namebuf); - newsect = bfd_make_section (abfd, name); - if (newsect == NULL) - return false; - newsect->vma = hdr->p_vaddr; - newsect->lma = hdr->p_paddr; - 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) - return false; - strcpy (name, namebuf); - newsect = bfd_make_section (abfd, name); - if (newsect == NULL) - return false; - newsect->vma = hdr->p_vaddr + hdr->p_filesz; - newsect->lma = hdr->p_paddr + hdr->p_filesz; - newsect->_raw_size = hdr->p_memsz - hdr->p_filesz; - if (hdr->p_type == PT_LOAD) - { - newsect->flags |= SEC_ALLOC; - if (hdr->p_flags & PF_X) - newsect->flags |= SEC_CODE; - } - if (!(hdr->p_flags & PF_W)) - newsect->flags |= SEC_READONLY; - } - - return true; -} - -/* Set up an ELF internal section header for a section. */ - -/*ARGSUSED*/ -static void -elf_fake_sections (abfd, asect, failedptrarg) - bfd *abfd; - asection *asect; - PTR failedptrarg; -{ - struct elf_backend_data *bed = get_elf_backend_data (abfd); - boolean *failedptr = (boolean *) failedptrarg; - Elf_Internal_Shdr *this_hdr; - - if (*failedptr) - { - /* We already failed; just get out of the bfd_map_over_sections - loop. */ - return; - } - - this_hdr = &elf_section_data (asect)->this_hdr; - - this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd), - asect->name, - true, false); - if (this_hdr->sh_name == (unsigned long) -1) - { - *failedptr = true; - return; - } - - this_hdr->sh_flags = 0; - - if ((asect->flags & SEC_ALLOC) != 0) - this_hdr->sh_addr = asect->vma; - else - this_hdr->sh_addr = 0; - - this_hdr->sh_offset = 0; - this_hdr->sh_size = asect->_raw_size; - this_hdr->sh_link = 0; - this_hdr->sh_addralign = 1 << asect->alignment_power; - /* The sh_entsize and sh_info fields may have been set already by - copy_private_section_data. */ - - this_hdr->bfd_section = asect; - this_hdr->contents = NULL; - - /* FIXME: This should not be based on section names. */ - if (strcmp (asect->name, ".dynstr") == 0) - this_hdr->sh_type = SHT_STRTAB; - else if (strcmp (asect->name, ".hash") == 0) - { - this_hdr->sh_type = SHT_HASH; - this_hdr->sh_entsize = bed->s->arch_size / 8; - } - else if (strcmp (asect->name, ".dynsym") == 0) - { - this_hdr->sh_type = SHT_DYNSYM; - this_hdr->sh_entsize = bed->s->sizeof_sym; - } - else if (strcmp (asect->name, ".dynamic") == 0) - { - this_hdr->sh_type = SHT_DYNAMIC; - this_hdr->sh_entsize = bed->s->sizeof_dyn; - } - else if (strncmp (asect->name, ".rela", 5) == 0 - && get_elf_backend_data (abfd)->use_rela_p) - { - this_hdr->sh_type = SHT_RELA; - this_hdr->sh_entsize = bed->s->sizeof_rela; - } - else if (strncmp (asect->name, ".rel", 4) == 0 - && ! get_elf_backend_data (abfd)->use_rela_p) - { - this_hdr->sh_type = SHT_REL; - this_hdr->sh_entsize = bed->s->sizeof_rel; - } - else if (strcmp (asect->name, ".note") == 0) - this_hdr->sh_type = SHT_NOTE; - else if (strncmp (asect->name, ".stab", 5) == 0 - && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0) - this_hdr->sh_type = SHT_STRTAB; - else if ((asect->flags & SEC_ALLOC) != 0 - && (asect->flags & SEC_LOAD) != 0) - this_hdr->sh_type = SHT_PROGBITS; - else if ((asect->flags & SEC_ALLOC) != 0 - && ((asect->flags & SEC_LOAD) == 0)) - this_hdr->sh_type = SHT_NOBITS; - else - { - /* Who knows? */ - this_hdr->sh_type = SHT_PROGBITS; - } - - if ((asect->flags & SEC_ALLOC) != 0) - this_hdr->sh_flags |= SHF_ALLOC; - if ((asect->flags & SEC_READONLY) == 0) - this_hdr->sh_flags |= SHF_WRITE; - if ((asect->flags & SEC_CODE) != 0) - this_hdr->sh_flags |= SHF_EXECINSTR; - - /* 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); - } - - /* If the section has relocs, set up a section header for the - SHT_REL[A] section. */ - if ((asect->flags & SEC_RELOC) != 0) - { - Elf_Internal_Shdr *rela_hdr; - int use_rela_p = get_elf_backend_data (abfd)->use_rela_p; - char *name; - - rela_hdr = &elf_section_data (asect)->rel_hdr; - name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name)); - if (name == NULL) - { - *failedptr = true; - return; - } - sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name); - rela_hdr->sh_name = - (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name, - true, false); - if (rela_hdr->sh_name == (unsigned int) -1) - { - *failedptr = true; - return; - } - rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL; - rela_hdr->sh_entsize = (use_rela_p - ? bed->s->sizeof_rela - : bed->s->sizeof_rel); - rela_hdr->sh_addralign = bed->s->file_align; - rela_hdr->sh_flags = 0; - rela_hdr->sh_addr = 0; - rela_hdr->sh_size = 0; - rela_hdr->sh_offset = 0; - } -} - -/* 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. */ - -static boolean -assign_section_numbers (abfd) - bfd *abfd; -{ - struct elf_obj_tdata *t = elf_tdata (abfd); - asection *sec; - unsigned int section_number; - Elf_Internal_Shdr **i_shdrp; - struct elf_backend_data *bed = get_elf_backend_data (abfd); - - section_number = 1; - - for (sec = abfd->sections; sec; sec = sec->next) - { - struct bfd_elf_section_data *d = elf_section_data (sec); - - d->this_idx = section_number++; - if ((sec->flags & SEC_RELOC) == 0) - d->rel_idx = 0; - else - d->rel_idx = section_number++; - } - - t->shstrtab_section = section_number++; - elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section; - t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); - - if (abfd->symcount > 0) - { - t->symtab_section = section_number++; - t->strtab_section = section_number++; - } - - elf_elfheader (abfd)->e_shnum = section_number; - - /* Set up the list of section header pointers, in agreement with the - indices. */ - i_shdrp = ((Elf_Internal_Shdr **) - bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *))); - if (i_shdrp == NULL) - return false; - - i_shdrp[0] = ((Elf_Internal_Shdr *) - bfd_alloc (abfd, sizeof (Elf_Internal_Shdr))); - if (i_shdrp[0] == NULL) - { - bfd_release (abfd, i_shdrp); - return false; - } - memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr)); - - elf_elfsections (abfd) = i_shdrp; - - i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr; - if (abfd->symcount > 0) - { - i_shdrp[t->symtab_section] = &t->symtab_hdr; - i_shdrp[t->strtab_section] = &t->strtab_hdr; - t->symtab_hdr.sh_link = t->strtab_section; - } - for (sec = abfd->sections; sec; sec = sec->next) - { - struct bfd_elf_section_data *d = elf_section_data (sec); - asection *s; - const char *name; - - i_shdrp[d->this_idx] = &d->this_hdr; - if (d->rel_idx != 0) - i_shdrp[d->rel_idx] = &d->rel_hdr; - - /* Fill in the sh_link and sh_info fields while we're at it. */ - - /* sh_link of a reloc section is the section index of the symbol - table. sh_info is the section index of the section to which - the relocation entries apply. */ - if (d->rel_idx != 0) - { - d->rel_hdr.sh_link = t->symtab_section; - d->rel_hdr.sh_info = d->this_idx; - } - - switch (d->this_hdr.sh_type) - { - case SHT_REL: - case SHT_RELA: - /* A reloc section which we are treating as a normal BFD - section. sh_link is the section index of the symbol - table. sh_info is the section index of the section to - which the relocation entries apply. We assume that an - allocated reloc section uses the dynamic symbol table. - FIXME: How can we be sure? */ - s = bfd_get_section_by_name (abfd, ".dynsym"); - if (s != NULL) - d->this_hdr.sh_link = elf_section_data (s)->this_idx; - - /* We look up the section the relocs apply to by name. */ - name = sec->name; - if (d->this_hdr.sh_type == SHT_REL) - name += 4; - else - name += 5; - s = bfd_get_section_by_name (abfd, name); - if (s != NULL) - d->this_hdr.sh_info = elf_section_data (s)->this_idx; - break; - - case SHT_STRTAB: - /* We assume that a section named .stab*str is a stabs - string section. We look for a section with the same name - but without the trailing ``str'', and set its sh_link - field to point to this section. */ - if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0 - && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0) - { - size_t len; - char *alc; - - len = strlen (sec->name); - alc = (char *) bfd_malloc (len - 2); - if (alc == NULL) - return false; - strncpy (alc, sec->name, len - 3); - alc[len - 3] = '\0'; - s = bfd_get_section_by_name (abfd, alc); - free (alc); - if (s != NULL) - { - elf_section_data (s)->this_hdr.sh_link = d->this_idx; - - /* This is a .stab section. */ - elf_section_data (s)->this_hdr.sh_entsize = - 4 + 2 * (bed->s->arch_size / 8); - } - } - break; - - case SHT_DYNAMIC: - case SHT_DYNSYM: - /* sh_link is the section header index of the string table - used for the dynamic entries or symbol table. */ - s = bfd_get_section_by_name (abfd, ".dynstr"); - if (s != NULL) - d->this_hdr.sh_link = elf_section_data (s)->this_idx; - break; - - case SHT_HASH: - /* sh_link is the section header index of the symbol table - this hash table is for. */ - s = bfd_get_section_by_name (abfd, ".dynsym"); - if (s != NULL) - d->this_hdr.sh_link = elf_section_data (s)->this_idx; - break; - } - } - - return true; -} - -/* Map symbol from it's internal number to the external number, moving - all local symbols to be at the head of the list. */ - -static INLINE int -sym_is_global (abfd, sym) - bfd *abfd; - asymbol *sym; -{ - /* If the backend has a special mapping, use it. */ - if (get_elf_backend_data (abfd)->elf_backend_sym_is_global) - return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global) - (abfd, sym)); - - return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0 - || bfd_is_und_section (bfd_get_section (sym)) - || bfd_is_com_section (bfd_get_section (sym))); -} - -static boolean -elf_map_symbols (abfd) - bfd *abfd; -{ - int symcount = bfd_get_symcount (abfd); - asymbol **syms = bfd_get_outsymbols (abfd); - asymbol **sect_syms; - int num_locals = 0; - int num_globals = 0; - int num_locals2 = 0; - int num_globals2 = 0; - int max_index = 0; - int num_sections = 0; - int idx; - asection *asect; - asymbol **new_syms; - -#ifdef DEBUG - fprintf (stderr, "elf_map_symbols\n"); - fflush (stderr); -#endif - - /* Add a section symbol for each BFD section. FIXME: Is this really - necessary? */ - for (asect = abfd->sections; asect; asect = asect->next) - { - if (max_index < asect->index) - max_index = asect->index; - } - - max_index++; - sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *)); - if (sect_syms == NULL) - return false; - elf_section_syms (abfd) = sect_syms; - - for (idx = 0; idx < symcount; idx++) - { - if ((syms[idx]->flags & BSF_SECTION_SYM) != 0 - && (syms[idx]->value + syms[idx]->section->vma) == 0) - { - asection *sec; - - sec = syms[idx]->section; - if (sec->owner != NULL) - { - if (sec->owner != abfd) - { - if (sec->output_offset != 0) - continue; - sec = sec->output_section; - BFD_ASSERT (sec->owner == abfd); - } - sect_syms[sec->index] = syms[idx]; - } - } - } - - for (asect = abfd->sections; asect; asect = asect->next) - { - asymbol *sym; - - if (sect_syms[asect->index] != NULL) - continue; - - sym = bfd_make_empty_symbol (abfd); - if (sym == NULL) - return false; - sym->the_bfd = abfd; - sym->name = asect->name; - sym->value = 0; - /* Set the flags to 0 to indicate that this one was newly added. */ - sym->flags = 0; - sym->section = asect; - sect_syms[asect->index] = sym; - num_sections++; -#ifdef DEBUG - fprintf (stderr, - "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n", - asect->name, (long) asect->vma, asect->index, (long) asect); -#endif - } - - /* Classify all of the symbols. */ - for (idx = 0; idx < symcount; idx++) - { - if (!sym_is_global (abfd, syms[idx])) - num_locals++; - else - num_globals++; - } - for (asect = abfd->sections; asect; asect = asect->next) - { - if (sect_syms[asect->index] != NULL - && sect_syms[asect->index]->flags == 0) - { - sect_syms[asect->index]->flags = BSF_SECTION_SYM; - if (!sym_is_global (abfd, sect_syms[asect->index])) - num_locals++; - else - num_globals++; - sect_syms[asect->index]->flags = 0; - } - } - - /* Now sort the symbols so the local symbols are first. */ - new_syms = ((asymbol **) - bfd_alloc (abfd, - (num_locals + num_globals) * sizeof (asymbol *))); - if (new_syms == NULL) - return false; - - for (idx = 0; idx < symcount; idx++) - { - asymbol *sym = syms[idx]; - int i; - - if (!sym_is_global (abfd, sym)) - i = num_locals2++; - else - i = num_locals + num_globals2++; - new_syms[i] = sym; - sym->udata.i = i + 1; - } - for (asect = abfd->sections; asect; asect = asect->next) - { - if (sect_syms[asect->index] != NULL - && sect_syms[asect->index]->flags == 0) - { - asymbol *sym = sect_syms[asect->index]; - int i; - - sym->flags = BSF_SECTION_SYM; - if (!sym_is_global (abfd, sym)) - i = num_locals2++; - else - i = num_locals + num_globals2++; - new_syms[i] = sym; - sym->udata.i = i + 1; - } - } - - bfd_set_symtab (abfd, new_syms, num_locals + num_globals); - - elf_num_locals (abfd) = num_locals; - elf_num_globals (abfd) = num_globals; - return true; -} - -/* Align to the maximum file alignment that could be required for any - ELF data structure. */ - -static INLINE file_ptr align_file_position PARAMS ((file_ptr, int)); -static INLINE file_ptr -align_file_position (off, align) - file_ptr off; - int align; -{ - return (off + align - 1) & ~(align - 1); -} - -/* Assign a file position to a section, optionally aligning to the - required section alignment. */ - -INLINE file_ptr -_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align) - Elf_Internal_Shdr *i_shdrp; - file_ptr offset; - boolean align; -{ - if (align) - { - unsigned int al; - - al = i_shdrp->sh_addralign; - if (al > 1) - offset = BFD_ALIGN (offset, al); - } - i_shdrp->sh_offset = offset; - if (i_shdrp->bfd_section != NULL) - i_shdrp->bfd_section->filepos = offset; - if (i_shdrp->sh_type != SHT_NOBITS) - offset += i_shdrp->sh_size; - return offset; -} - -/* Compute the file positions we are going to put the sections at, and - otherwise prepare to begin writing out the ELF file. If LINK_INFO - is not NULL, this is being called by the ELF backend linker. */ - -boolean -_bfd_elf_compute_section_file_positions (abfd, link_info) - bfd *abfd; - struct bfd_link_info *link_info; -{ - struct elf_backend_data *bed = get_elf_backend_data (abfd); - boolean failed; - struct bfd_strtab_hash *strtab; - Elf_Internal_Shdr *shstrtab_hdr; - - if (abfd->output_has_begun) - return true; - - /* Do any elf backend specific processing first. */ - if (bed->elf_backend_begin_write_processing) - (*bed->elf_backend_begin_write_processing) (abfd, link_info); - - if (! prep_headers (abfd)) - return false; - - failed = false; - bfd_map_over_sections (abfd, elf_fake_sections, &failed); - if (failed) - return false; - - if (!assign_section_numbers (abfd)) - return false; - - /* The backend linker builds symbol table information itself. */ - if (link_info == NULL && abfd->symcount > 0) - { - if (! swap_out_syms (abfd, &strtab)) - return false; - } - - shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr; - /* sh_name was set in prep_headers. */ - shstrtab_hdr->sh_type = SHT_STRTAB; - shstrtab_hdr->sh_flags = 0; - shstrtab_hdr->sh_addr = 0; - shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd)); - shstrtab_hdr->sh_entsize = 0; - shstrtab_hdr->sh_link = 0; - shstrtab_hdr->sh_info = 0; - /* sh_offset is set in assign_file_positions_except_relocs. */ - shstrtab_hdr->sh_addralign = 1; - - if (!assign_file_positions_except_relocs (abfd)) - return false; - - if (link_info == NULL && abfd->symcount > 0) - { - file_ptr off; - Elf_Internal_Shdr *hdr; - - off = elf_tdata (abfd)->next_file_pos; - - hdr = &elf_tdata (abfd)->symtab_hdr; - off = _bfd_elf_assign_file_position_for_section (hdr, off, true); - - hdr = &elf_tdata (abfd)->strtab_hdr; - off = _bfd_elf_assign_file_position_for_section (hdr, off, true); - - elf_tdata (abfd)->next_file_pos = off; - - /* Now that we know where the .strtab section goes, write it - out. */ - if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) != 0 - || ! _bfd_stringtab_emit (abfd, strtab)) - return false; - _bfd_stringtab_free (strtab); - } - - abfd->output_has_begun = true; - - return true; -} - -/* Create a mapping from a set of sections to a program segment. */ - -static INLINE struct elf_segment_map * -make_mapping (abfd, sections, from, to, phdr) - bfd *abfd; - asection **sections; - unsigned int from; - unsigned int to; - boolean phdr; -{ - struct elf_segment_map *m; - unsigned int i; - asection **hdrpp; - - m = ((struct elf_segment_map *) - bfd_zalloc (abfd, - (sizeof (struct elf_segment_map) - + (to - from - 1) * sizeof (asection *)))); - if (m == NULL) - return NULL; - m->next = NULL; - m->p_type = PT_LOAD; - for (i = from, hdrpp = sections + from; i < to; i++, hdrpp++) - m->sections[i - from] = *hdrpp; - m->count = to - from; - - if (from == 0 && phdr) - { - /* Include the headers in the first PT_LOAD segment. */ - m->includes_filehdr = 1; - m->includes_phdrs = 1; - } - - return m; -} - -/* Set up a mapping from BFD sections to program segments. */ - -static boolean -map_sections_to_segments (abfd) - bfd *abfd; -{ - asection **sections = NULL; - asection *s; - unsigned int i; - unsigned int count; - struct elf_segment_map *mfirst; - struct elf_segment_map **pm; - struct elf_segment_map *m; - asection *last_hdr; - unsigned int phdr_index; - bfd_vma maxpagesize; - asection **hdrpp; - boolean phdr_in_section = true; - boolean writable; - asection *dynsec; - - if (elf_tdata (abfd)->segment_map != NULL) - return true; - - if (bfd_count_sections (abfd) == 0) - return true; - - /* Select the allocated sections, and sort them. */ - - sections = (asection **) bfd_malloc (bfd_count_sections (abfd) - * sizeof (asection *)); - if (sections == NULL) - goto error_return; - - i = 0; - for (s = abfd->sections; s != NULL; s = s->next) - { - if ((s->flags & SEC_ALLOC) != 0) - { - sections[i] = s; - ++i; - } - } - BFD_ASSERT (i <= bfd_count_sections (abfd)); - count = i; - - qsort (sections, (size_t) count, sizeof (asection *), elf_sort_sections); - - /* Build the mapping. */ - - mfirst = NULL; - pm = &mfirst; - - /* If we have a .interp section, then create a PT_PHDR segment for - the program headers and a PT_INTERP segment for the .interp - section. */ - s = bfd_get_section_by_name (abfd, ".interp"); - if (s != NULL && (s->flags & SEC_LOAD) != 0) - { - m = ((struct elf_segment_map *) - bfd_zalloc (abfd, sizeof (struct elf_segment_map))); - if (m == NULL) - goto error_return; - m->next = NULL; - m->p_type = PT_PHDR; - /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */ - m->p_flags = PF_R | PF_X; - m->p_flags_valid = 1; - m->includes_phdrs = 1; - - *pm = m; - pm = &m->next; - - m = ((struct elf_segment_map *) - bfd_zalloc (abfd, sizeof (struct elf_segment_map))); - if (m == NULL) - goto error_return; - m->next = NULL; - m->p_type = PT_INTERP; - m->count = 1; - m->sections[0] = s; - - *pm = m; - pm = &m->next; - } - - /* Look through the sections. We put sections in the same program - segment when the start of the second section can be placed within - a few bytes of the end of the first section. */ - last_hdr = NULL; - phdr_index = 0; - maxpagesize = get_elf_backend_data (abfd)->maxpagesize; - writable = false; - dynsec = bfd_get_section_by_name (abfd, ".dynamic"); - if (dynsec != NULL - && (dynsec->flags & SEC_LOAD) == 0) - dynsec = NULL; - - /* Deal with -Ttext or something similar such that the - first section is not adjacent to the program headers. */ - if (count - && ((sections[0]->lma % maxpagesize) < - (elf_tdata (abfd)->program_header_size % maxpagesize))) - phdr_in_section = false; - - for (i = 0, hdrpp = sections; i < count; i++, hdrpp++) - { - asection *hdr; - - hdr = *hdrpp; - - /* See if this section and the last one will fit in the same - segment. Don't put a loadable section after a non-loadable - section. If we are building a dynamic executable, don't put - a writable section in a read only segment (we don't do this - for a non-dynamic executable because some people prefer to - have only one program segment; anybody can use PHDRS in their - linker script to control what happens anyhow). */ - if (last_hdr == NULL - || ((BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize) - >= hdr->lma) - && ((last_hdr->flags & SEC_LOAD) != 0 - || (hdr->flags & SEC_LOAD) == 0) - && (dynsec == NULL - || writable - || (hdr->flags & SEC_READONLY) != 0))) - { - last_hdr = hdr; - continue; - } - - /* This section won't fit in the program segment. We must - create a new program header holding all the sections from - phdr_index until hdr. */ - - m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section); - if (m == NULL) - goto error_return; - - *pm = m; - pm = &m->next; - - if ((hdr->flags & SEC_READONLY) == 0) - writable = true; - - last_hdr = hdr; - phdr_index = i; - phdr_in_section = false; - } - - /* Create a final PT_LOAD program segment. */ - if (last_hdr != NULL) - { - m = make_mapping (abfd, sections, phdr_index, i, phdr_in_section); - if (m == NULL) - goto error_return; - - *pm = m; - pm = &m->next; - } - - /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */ - if (dynsec != NULL) - { - m = ((struct elf_segment_map *) - bfd_zalloc (abfd, sizeof (struct elf_segment_map))); - if (m == NULL) - goto error_return; - m->next = NULL; - m->p_type = PT_DYNAMIC; - m->count = 1; - m->sections[0] = dynsec; - - *pm = m; - pm = &m->next; - } - - free (sections); - sections = NULL; - - elf_tdata (abfd)->segment_map = mfirst; - return true; - - error_return: - if (sections != NULL) - free (sections); - return false; -} - -/* Sort sections by VMA. */ - -static int -elf_sort_sections (arg1, arg2) - const PTR arg1; - const PTR arg2; -{ - const asection *sec1 = *(const asection **) arg1; - const asection *sec2 = *(const asection **) arg2; - - if (sec1->vma < sec2->vma) - return -1; - else if (sec1->vma > sec2->vma) - return 1; - - /* Put !SEC_LOAD sections after SEC_LOAD ones. */ - -#define TOEND(x) (((x)->flags & SEC_LOAD) == 0) - - if (TOEND (sec1)) - if (TOEND (sec2)) - return sec1->target_index - sec2->target_index; - else - return 1; - - if (TOEND (sec2)) - return -1; - -#undef TOEND - - /* Sort by size, to put zero sized sections before others at the - same address. */ - - if (sec1->_raw_size < sec2->_raw_size) - return -1; - if (sec1->_raw_size > sec2->_raw_size) - return 1; - - return sec1->target_index - sec2->target_index; -} - -/* Assign file positions to the sections based on the mapping from - sections to segments. This function also sets up some fields in - the file header, and writes out the program headers. */ - -static boolean -assign_file_positions_for_segments (abfd) - bfd *abfd; -{ - const struct elf_backend_data *bed = get_elf_backend_data (abfd); - unsigned int count; - struct elf_segment_map *m; - unsigned int alloc; - Elf_Internal_Phdr *phdrs; - file_ptr off; - bfd_vma filehdr_vaddr, filehdr_paddr; - bfd_vma phdrs_vaddr, phdrs_paddr; - Elf_Internal_Phdr *p; - - if (elf_tdata (abfd)->segment_map == NULL) - { - if (! map_sections_to_segments (abfd)) - return false; - } - - if (bed->elf_backend_modify_segment_map) - { - if (! (*bed->elf_backend_modify_segment_map) (abfd)) - return false; - } - - count = 0; - for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) - ++count; - - elf_elfheader (abfd)->e_phoff = bed->s->sizeof_ehdr; - elf_elfheader (abfd)->e_phentsize = bed->s->sizeof_phdr; - elf_elfheader (abfd)->e_phnum = count; - - if (count == 0) - return true; - - /* If we already counted the number of program segments, make sure - that we allocated enough space. This happens when SIZEOF_HEADERS - is used in a linker script. */ - alloc = elf_tdata (abfd)->program_header_size / bed->s->sizeof_phdr; - if (alloc != 0 && count > alloc) - { - ((*_bfd_error_handler) - ("%s: Not enough room for program headers (allocated %u, need %u)", - bfd_get_filename (abfd), alloc, count)); - bfd_set_error (bfd_error_bad_value); - return false; - } - - if (alloc == 0) - alloc = count; - - phdrs = ((Elf_Internal_Phdr *) - bfd_alloc (abfd, alloc * sizeof (Elf_Internal_Phdr))); - if (phdrs == NULL) - return false; - - off = bed->s->sizeof_ehdr; - off += alloc * bed->s->sizeof_phdr; - - filehdr_vaddr = 0; - filehdr_paddr = 0; - phdrs_vaddr = 0; - phdrs_paddr = 0; - for (m = elf_tdata (abfd)->segment_map, p = phdrs; - m != NULL; - m = m->next, p++) - { - unsigned int i; - asection **secpp; - - /* If elf_segment_map is not from map_sections_to_segments, the - sections may not be correctly ordered. */ - if (m->count > 0) - qsort (m->sections, (size_t) m->count, sizeof (asection *), - elf_sort_sections); - - p->p_type = m->p_type; - - if (m->p_flags_valid) - p->p_flags = m->p_flags; - else - p->p_flags = 0; - - if (p->p_type == PT_LOAD - && m->count > 0 - && (m->sections[0]->flags & SEC_LOAD) != 0) - off += (m->sections[0]->vma - off) % bed->maxpagesize; - - if (m->count == 0) - p->p_vaddr = 0; - else - p->p_vaddr = m->sections[0]->vma; - - if (m->p_paddr_valid) - p->p_paddr = m->p_paddr; - else if (m->count == 0) - p->p_paddr = 0; - else - p->p_paddr = m->sections[0]->lma; - - if (p->p_type == PT_LOAD) - p->p_align = bed->maxpagesize; - else if (m->count == 0) - p->p_align = bed->s->file_align; - else - p->p_align = 0; - - p->p_offset = 0; - p->p_filesz = 0; - p->p_memsz = 0; - - if (m->includes_filehdr) - { - if (! m->p_flags_valid) - p->p_flags |= PF_R; - p->p_offset = 0; - p->p_filesz = bed->s->sizeof_ehdr; - p->p_memsz = bed->s->sizeof_ehdr; - if (m->count > 0) - { - BFD_ASSERT (p->p_type == PT_LOAD); - p->p_vaddr -= off; - if (! m->p_paddr_valid) - p->p_paddr -= off; - } - if (p->p_type == PT_LOAD) - { - filehdr_vaddr = p->p_vaddr; - filehdr_paddr = p->p_paddr; - } - } - - if (m->includes_phdrs) - { - if (! m->p_flags_valid) - p->p_flags |= PF_R; - if (m->includes_filehdr) - { - if (p->p_type == PT_LOAD) - { - phdrs_vaddr = p->p_vaddr + bed->s->sizeof_ehdr; - phdrs_paddr = p->p_paddr + bed->s->sizeof_ehdr; - } - } - else - { - p->p_offset = bed->s->sizeof_ehdr; - if (m->count > 0) - { - BFD_ASSERT (p->p_type == PT_LOAD); - p->p_vaddr -= off - p->p_offset; - if (! m->p_paddr_valid) - p->p_paddr -= off - p->p_offset; - } - if (p->p_type == PT_LOAD) - { - phdrs_vaddr = p->p_vaddr; - phdrs_paddr = p->p_paddr; - } - } - p->p_filesz += alloc * bed->s->sizeof_phdr; - p->p_memsz += alloc * bed->s->sizeof_phdr; - } - - if (p->p_type == PT_LOAD) - { - if (! m->includes_filehdr && ! m->includes_phdrs) - p->p_offset = off; - else - { - file_ptr adjust; - - adjust = off - (p->p_offset + p->p_filesz); - p->p_filesz += adjust; - p->p_memsz += adjust; - } - } - - for (i = 0, secpp = m->sections; i < m->count; i++, secpp++) - { - asection *sec; - flagword flags; - bfd_size_type align; - - sec = *secpp; - flags = sec->flags; - - if (p->p_type == PT_LOAD) - { - bfd_vma adjust; - - /* The section VMA must equal the file position modulo - the page size. */ - if ((flags & SEC_ALLOC) != 0) - { - adjust = (sec->vma - off) % bed->maxpagesize; - if (adjust != 0) - { - if (i == 0) - abort (); - p->p_memsz += adjust; - off += adjust; - if ((flags & SEC_LOAD) != 0) - p->p_filesz += adjust; - } - } - - sec->filepos = off; - - if ((flags & SEC_LOAD) != 0) - off += sec->_raw_size; - } - - p->p_memsz += sec->_raw_size; - - if ((flags & SEC_LOAD) != 0) - p->p_filesz += sec->_raw_size; - - align = 1 << bfd_get_section_alignment (abfd, sec); - if (align > p->p_align) - p->p_align = align; - - if (! m->p_flags_valid) - { - p->p_flags |= PF_R; - if ((flags & SEC_CODE) != 0) - p->p_flags |= PF_X; - if ((flags & SEC_READONLY) == 0) - p->p_flags |= PF_W; - } - } - } - - /* Now that we have set the section file positions, we can set up - the file positions for the non PT_LOAD segments. */ - for (m = elf_tdata (abfd)->segment_map, p = phdrs; - m != NULL; - m = m->next, p++) - { - if (p->p_type != PT_LOAD && m->count > 0) - { - BFD_ASSERT (! m->includes_filehdr && ! m->includes_phdrs); - p->p_offset = m->sections[0]->filepos; - } - if (m->count == 0) - { - if (m->includes_filehdr) - { - p->p_vaddr = filehdr_vaddr; - if (! m->p_paddr_valid) - p->p_paddr = filehdr_paddr; - } - else if (m->includes_phdrs) - { - p->p_vaddr = phdrs_vaddr; - if (! m->p_paddr_valid) - p->p_paddr = phdrs_paddr; - } - } - } - - /* Clear out any program headers we allocated but did not use. */ - for (; count < alloc; count++, p++) - { - memset (p, 0, sizeof *p); - p->p_type = PT_NULL; - } - - elf_tdata (abfd)->phdr = phdrs; - - elf_tdata (abfd)->next_file_pos = off; - - /* Write out the program headers. */ - if (bfd_seek (abfd, bed->s->sizeof_ehdr, SEEK_SET) != 0 - || bed->s->write_out_phdrs (abfd, phdrs, alloc) != 0) - return false; - - return true; -} - -/* Get the size of the program header. - - If this is called by the linker before any of the section VMA's are set, it - can't calculate the correct value for a strange memory layout. This only - happens when SIZEOF_HEADERS is used in a linker script. In this case, - SORTED_HDRS is NULL and we assume the normal scenario of one text and one - data segment (exclusive of .interp and .dynamic). - - ??? User written scripts must either not use SIZEOF_HEADERS, or assume there - will be two segments. */ - -static bfd_size_type -get_program_header_size (abfd) - bfd *abfd; -{ - size_t segs; - asection *s; - struct elf_backend_data *bed = get_elf_backend_data (abfd); - - /* We can't return a different result each time we're called. */ - if (elf_tdata (abfd)->program_header_size != 0) - return elf_tdata (abfd)->program_header_size; - - if (elf_tdata (abfd)->segment_map != NULL) - { - struct elf_segment_map *m; - - segs = 0; - for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) - ++segs; - elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; - return elf_tdata (abfd)->program_header_size; - } - - /* Assume we will need exactly two PT_LOAD segments: one for text - and one for data. */ - segs = 2; - - s = bfd_get_section_by_name (abfd, ".interp"); - if (s != NULL && (s->flags & SEC_LOAD) != 0) - { - /* If we have a loadable interpreter section, we need a - PT_INTERP segment. In this case, assume we also need a - PT_PHDR segment, although that may not be true for all - targets. */ - segs += 2; - } - - if (bfd_get_section_by_name (abfd, ".dynamic") != NULL) - { - /* We need a PT_DYNAMIC segment. */ - ++segs; - } - - /* Let the backend count up any program headers it might need. */ - if (bed->elf_backend_additional_program_headers) - { - int a; - - a = (*bed->elf_backend_additional_program_headers) (abfd); - if (a == -1) - abort (); - segs += a; - } - - elf_tdata (abfd)->program_header_size = segs * bed->s->sizeof_phdr; - return elf_tdata (abfd)->program_header_size; -} - -/* Work out the file positions of all the sections. This is called by - _bfd_elf_compute_section_file_positions. All the section sizes and - VMAs must be known before this is called. - - We do not consider reloc sections at this point, unless they form - part of the loadable image. Reloc sections are assigned file - positions in assign_file_positions_for_relocs, which is called by - write_object_contents and final_link. - - We also don't set the positions of the .symtab and .strtab here. */ - -static boolean -assign_file_positions_except_relocs (abfd) - bfd *abfd; -{ - struct elf_obj_tdata * const tdata = elf_tdata (abfd); - Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd); - Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd); - file_ptr off; - struct elf_backend_data *bed = get_elf_backend_data (abfd); - - if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0) - { - Elf_Internal_Shdr **hdrpp; - unsigned int i; - - /* Start after the ELF header. */ - off = i_ehdrp->e_ehsize; - - /* We are not creating an executable, which means that we are - not creating a program header, and that the actual order of - the sections in the file is unimportant. */ - for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) - { - Elf_Internal_Shdr *hdr; - - hdr = *hdrpp; - if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA) - { - hdr->sh_offset = -1; - continue; - } - if (i == tdata->symtab_section - || i == tdata->strtab_section) - { - hdr->sh_offset = -1; - continue; - } - - off = _bfd_elf_assign_file_position_for_section (hdr, off, true); - } - } - else - { - unsigned int i; - Elf_Internal_Shdr **hdrpp; - - /* Assign file positions for the loaded sections based on the - assignment of sections to segments. */ - if (! assign_file_positions_for_segments (abfd)) - return false; - - /* Assign file positions for the other sections. */ - - off = elf_tdata (abfd)->next_file_pos; - for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++) - { - Elf_Internal_Shdr *hdr; - - hdr = *hdrpp; - if (hdr->bfd_section != NULL - && hdr->bfd_section->filepos != 0) - hdr->sh_offset = hdr->bfd_section->filepos; - else if ((hdr->sh_flags & SHF_ALLOC) != 0) - { - ((*_bfd_error_handler) - ("%s: warning: allocated section `%s' not in segment", - bfd_get_filename (abfd), - (hdr->bfd_section == NULL - ? "*unknown*" - : hdr->bfd_section->name))); - off += (hdr->sh_addr - off) % bed->maxpagesize; - off = _bfd_elf_assign_file_position_for_section (hdr, off, - false); - } - else if (hdr->sh_type == SHT_REL - || hdr->sh_type == SHT_RELA - || hdr == i_shdrpp[tdata->symtab_section] - || hdr == i_shdrpp[tdata->strtab_section]) - hdr->sh_offset = -1; - else - off = _bfd_elf_assign_file_position_for_section (hdr, off, true); - } - } - - /* Place the section headers. */ - off = align_file_position (off, bed->s->file_align); - i_ehdrp->e_shoff = off; - off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize; - - elf_tdata (abfd)->next_file_pos = off; - - return true; -} - -static boolean -prep_headers (abfd) - bfd *abfd; -{ - Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */ - Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */ - Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */ - int count; - struct bfd_strtab_hash *shstrtab; - struct elf_backend_data *bed = get_elf_backend_data (abfd); - - i_ehdrp = elf_elfheader (abfd); - i_shdrp = elf_elfsections (abfd); - - shstrtab = _bfd_elf_stringtab_init (); - if (shstrtab == NULL) - return false; - - elf_shstrtab (abfd) = shstrtab; - - i_ehdrp->e_ident[EI_MAG0] = ELFMAG0; - i_ehdrp->e_ident[EI_MAG1] = ELFMAG1; - i_ehdrp->e_ident[EI_MAG2] = ELFMAG2; - i_ehdrp->e_ident[EI_MAG3] = ELFMAG3; - - i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass; - i_ehdrp->e_ident[EI_DATA] = - bfd_big_endian (abfd) ? ELFDATA2MSB : ELFDATA2LSB; - i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current; - - for (count = EI_PAD; count < EI_NIDENT; count++) - i_ehdrp->e_ident[count] = 0; - - if ((abfd->flags & DYNAMIC) != 0) - i_ehdrp->e_type = ET_DYN; - else if ((abfd->flags & EXEC_P) != 0) - i_ehdrp->e_type = ET_EXEC; - else - i_ehdrp->e_type = ET_REL; - - switch (bfd_get_arch (abfd)) - { - case bfd_arch_unknown: - i_ehdrp->e_machine = EM_NONE; - break; - case bfd_arch_sparc: - if (bed->s->arch_size == 64) - i_ehdrp->e_machine = EM_SPARC64; - else - i_ehdrp->e_machine = EM_SPARC; - break; - case bfd_arch_i386: - i_ehdrp->e_machine = EM_386; - break; - case bfd_arch_m68k: - i_ehdrp->e_machine = EM_68K; - break; - case bfd_arch_m88k: - i_ehdrp->e_machine = EM_88K; - break; - case bfd_arch_i860: - i_ehdrp->e_machine = EM_860; - break; - case bfd_arch_mips: /* MIPS Rxxxx */ - i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */ - break; - case bfd_arch_hppa: - i_ehdrp->e_machine = EM_PARISC; - break; - case bfd_arch_powerpc: - i_ehdrp->e_machine = EM_PPC; - break; - /* also note that EM_M32, AT&T WE32100 is unknown to bfd */ - default: - i_ehdrp->e_machine = EM_NONE; - } - i_ehdrp->e_version = bed->s->ev_current; - i_ehdrp->e_ehsize = bed->s->sizeof_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 = bed->s->sizeof_shdr; - - /* if we're building an executable, we'll need a program header table */ - if (abfd->flags & EXEC_P) - { - /* it all happens later */ -#if 0 - i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr); - - /* elf_build_phdrs() returns a (NULL-terminated) array of - Elf_Internal_Phdrs */ - i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum); - i_ehdrp->e_phoff = outbase; - outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum; -#endif - } - else - { - i_ehdrp->e_phentsize = 0; - i_phdrp = 0; - i_ehdrp->e_phoff = 0; - } - - elf_tdata (abfd)->symtab_hdr.sh_name = - (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false); - elf_tdata (abfd)->strtab_hdr.sh_name = - (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false); - elf_tdata (abfd)->shstrtab_hdr.sh_name = - (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false); - if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 - || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1 - || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1) - return false; - - return true; -} - -/* Assign file positions for all the reloc sections which are not part - of the loadable file image. */ - -void -_bfd_elf_assign_file_positions_for_relocs (abfd) - bfd *abfd; -{ - file_ptr off; - unsigned int i; - Elf_Internal_Shdr **shdrpp; - - off = elf_tdata (abfd)->next_file_pos; - - for (i = 1, shdrpp = elf_elfsections (abfd) + 1; - i < elf_elfheader (abfd)->e_shnum; - i++, shdrpp++) - { - Elf_Internal_Shdr *shdrp; - - shdrp = *shdrpp; - if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA) - && shdrp->sh_offset == -1) - off = _bfd_elf_assign_file_position_for_section (shdrp, off, true); - } - - elf_tdata (abfd)->next_file_pos = off; -} - -boolean -_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; - boolean failed; - unsigned int count; - - if (! abfd->output_has_begun - && ! _bfd_elf_compute_section_file_positions (abfd, - (struct bfd_link_info *) NULL)) - return false; - - i_shdrp = elf_elfsections (abfd); - i_ehdrp = elf_elfheader (abfd); - - failed = false; - bfd_map_over_sections (abfd, bed->s->write_relocs, &failed); - if (failed) - return false; - _bfd_elf_assign_file_positions_for_relocs (abfd); - - /* After writing the headers, we need to write the sections too... */ - for (count = 1; count < i_ehdrp->e_shnum; count++) - { - if (bed->elf_backend_section_processing) - (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]); - if (i_shdrp[count]->contents) - { - if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0 - || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size, - 1, abfd) - != i_shdrp[count]->sh_size)) - return false; - } - } - - /* Write out the section header names. */ - if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0 - || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd))) - return false; - - if (bed->elf_backend_final_write_processing) - (*bed->elf_backend_final_write_processing) (abfd, - elf_tdata (abfd)->linker); - - return bed->s->write_shdrs_and_ehdr (abfd); -} - -/* given a section, search the header to find them... */ -int -_bfd_elf_section_from_bfd_section (abfd, asect) - bfd *abfd; - struct sec *asect; -{ - struct elf_backend_data *bed = get_elf_backend_data (abfd); - Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd); - int index; - Elf_Internal_Shdr *hdr; - int maxindex = elf_elfheader (abfd)->e_shnum; - - for (index = 0; index < maxindex; index++) - { - hdr = i_shdrp[index]; - if (hdr->bfd_section == asect) - return index; - } - - if (bed->elf_backend_section_from_bfd_section) - { - for (index = 0; index < maxindex; index++) - { - int retval; - - hdr = i_shdrp[index]; - retval = index; - if ((*bed->elf_backend_section_from_bfd_section) - (abfd, hdr, asect, &retval)) - return retval; - } - } - - if (bfd_is_abs_section (asect)) - return SHN_ABS; - if (bfd_is_com_section (asect)) - return SHN_COMMON; - if (bfd_is_und_section (asect)) - return SHN_UNDEF; - - return -1; -} - -/* Given a BFD symbol, return the index in the ELF symbol table, or -1 - on error. */ - -int -_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr) - bfd *abfd; - struct symbol_cache_entry **asym_ptr_ptr; -{ - struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr; - int idx; - flagword flags = asym_ptr->flags; - - /* When gas creates relocations against local labels, it creates its - own symbol for the section, but does put the symbol into the - symbol chain, so udata is 0. When the linker is generating - relocatable output, this section symbol may be for one of the - input sections rather than the output section. */ - if (asym_ptr->udata.i == 0 - && (flags & BSF_SECTION_SYM) - && asym_ptr->section) - { - int indx; - - if (asym_ptr->section->output_section != NULL) - indx = asym_ptr->section->output_section->index; - else - indx = asym_ptr->section->index; - if (elf_section_syms (abfd)[indx]) - asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i; - } - - idx = asym_ptr->udata.i; - - if (idx == 0) - { - /* This case can occur when using --strip-symbol on a symbol - which is used in a relocation entry. */ - (*_bfd_error_handler) - ("%s: symbol `%s' required but not present", - bfd_get_filename (abfd), bfd_asymbol_name (asym_ptr)); - bfd_set_error (bfd_error_no_symbols); - return -1; - } - -#if DEBUG & 4 - { - fprintf (stderr, - "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n", - (long) asym_ptr, asym_ptr->name, idx, flags, - elf_symbol_flags (flags)); - fflush (stderr); - } -#endif - - return idx; -} - -/* Copy private BFD data. This copies any program header information. */ - -static boolean -copy_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - Elf_Internal_Ehdr *iehdr; - struct elf_segment_map *mfirst; - struct elf_segment_map **pm; - Elf_Internal_Phdr *p; - unsigned int i, c; - - if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour - || bfd_get_flavour (obfd) != bfd_target_elf_flavour) - return true; - - if (elf_tdata (ibfd)->phdr == NULL) - return true; - - iehdr = elf_elfheader (ibfd); - - mfirst = NULL; - pm = &mfirst; - - c = elf_elfheader (ibfd)->e_phnum; - for (i = 0, p = elf_tdata (ibfd)->phdr; i < c; i++, p++) - { - unsigned int csecs; - asection *s; - struct elf_segment_map *m; - unsigned int isec; - - csecs = 0; - - /* The complicated case when p_vaddr is 0 is to handle the - Solaris linker, which generates a PT_INTERP section with - p_vaddr and p_memsz set to 0. */ - for (s = ibfd->sections; s != NULL; s = s->next) - if (((s->vma >= p->p_vaddr - && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz - || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz)) - || (p->p_vaddr == 0 - && p->p_filesz > 0 - && (s->flags & SEC_HAS_CONTENTS) != 0 - && (bfd_vma) s->filepos >= p->p_offset - && ((bfd_vma) s->filepos + s->_raw_size - <= p->p_offset + p->p_filesz))) - && (s->flags & SEC_ALLOC) != 0 - && s->output_section != NULL) - ++csecs; - - m = ((struct elf_segment_map *) - bfd_alloc (obfd, - (sizeof (struct elf_segment_map) - + (csecs - 1) * sizeof (asection *)))); - if (m == NULL) - return false; - - m->next = NULL; - m->p_type = p->p_type; - m->p_flags = p->p_flags; - m->p_flags_valid = 1; - m->p_paddr = p->p_paddr; - m->p_paddr_valid = 1; - - m->includes_filehdr = (p->p_offset == 0 - && p->p_filesz >= iehdr->e_ehsize); - - m->includes_phdrs = (p->p_offset <= (bfd_vma) iehdr->e_phoff - && (p->p_offset + p->p_filesz - >= ((bfd_vma) iehdr->e_phoff - + iehdr->e_phnum * iehdr->e_phentsize))); - - isec = 0; - for (s = ibfd->sections; s != NULL; s = s->next) - { - if (((s->vma >= p->p_vaddr - && (s->vma + s->_raw_size <= p->p_vaddr + p->p_memsz - || s->vma + s->_raw_size <= p->p_vaddr + p->p_filesz)) - || (p->p_vaddr == 0 - && p->p_filesz > 0 - && (s->flags & SEC_HAS_CONTENTS) != 0 - && (bfd_vma) s->filepos >= p->p_offset - && ((bfd_vma) s->filepos + s->_raw_size - <= p->p_offset + p->p_filesz))) - && (s->flags & SEC_ALLOC) != 0 - && s->output_section != NULL) - { - m->sections[isec] = s->output_section; - ++isec; - } - } - BFD_ASSERT (isec == csecs); - m->count = csecs; - - *pm = m; - pm = &m->next; - } - - elf_tdata (obfd)->segment_map = mfirst; - - return true; -} - -/* Copy private section information. This copies over the entsize - field, and sometimes the info field. */ - -boolean -_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec) - bfd *ibfd; - asection *isec; - bfd *obfd; - asection *osec; -{ - Elf_Internal_Shdr *ihdr, *ohdr; - - if (ibfd->xvec->flavour != bfd_target_elf_flavour - || obfd->xvec->flavour != bfd_target_elf_flavour) - return true; - - /* Copy over private BFD data if it has not already been copied. - This must be done here, rather than in the copy_private_bfd_data - entry point, because the latter is called after the section - contents have been set, which means that the program headers have - already been worked out. */ - if (elf_tdata (obfd)->segment_map == NULL - && elf_tdata (ibfd)->phdr != NULL) - { - asection *s; - - /* Only set up the segments when all the sections have been set - up. */ - for (s = ibfd->sections; s != NULL; s = s->next) - if (s->output_section == NULL) - break; - if (s == NULL) - { - if (! copy_private_bfd_data (ibfd, obfd)) - return false; - } - } - - ihdr = &elf_section_data (isec)->this_hdr; - ohdr = &elf_section_data (osec)->this_hdr; - - ohdr->sh_entsize = ihdr->sh_entsize; - - if (ihdr->sh_type == SHT_SYMTAB - || ihdr->sh_type == SHT_DYNSYM) - ohdr->sh_info = ihdr->sh_info; - - return true; -} - -/* Copy private symbol information. If this symbol is in a section - which we did not map into a BFD section, try to map the section - index correctly. We use special macro definitions for the mapped - section indices; these definitions are interpreted by the - swap_out_syms function. */ - -#define MAP_ONESYMTAB (SHN_LORESERVE - 1) -#define MAP_DYNSYMTAB (SHN_LORESERVE - 2) -#define MAP_STRTAB (SHN_LORESERVE - 3) -#define MAP_SHSTRTAB (SHN_LORESERVE - 4) - -boolean -_bfd_elf_copy_private_symbol_data (ibfd, isymarg, obfd, osymarg) - bfd *ibfd; - asymbol *isymarg; - bfd *obfd; - asymbol *osymarg; -{ - elf_symbol_type *isym, *osym; - - isym = elf_symbol_from (ibfd, isymarg); - osym = elf_symbol_from (obfd, osymarg); - - if (isym != NULL - && osym != NULL - && bfd_is_abs_section (isym->symbol.section)) - { - unsigned int shndx; - - shndx = isym->internal_elf_sym.st_shndx; - if (shndx == elf_onesymtab (ibfd)) - shndx = MAP_ONESYMTAB; - else if (shndx == elf_dynsymtab (ibfd)) - shndx = MAP_DYNSYMTAB; - else if (shndx == elf_tdata (ibfd)->strtab_section) - shndx = MAP_STRTAB; - else if (shndx == elf_tdata (ibfd)->shstrtab_section) - shndx = MAP_SHSTRTAB; - osym->internal_elf_sym.st_shndx = shndx; - } - - return true; -} - -/* Swap out the symbols. */ - -static boolean -swap_out_syms (abfd, sttp) - bfd *abfd; - struct bfd_strtab_hash **sttp; -{ - struct elf_backend_data *bed = get_elf_backend_data (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 bfd_strtab_hash *stt; - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Shdr *symstrtab_hdr; - char *outbound_syms; - int idx; - - stt = _bfd_elf_stringtab_init (); - if (stt == NULL) - return false; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - symtab_hdr->sh_type = SHT_SYMTAB; - symtab_hdr->sh_entsize = bed->s->sizeof_sym; - symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1); - symtab_hdr->sh_info = elf_num_locals (abfd) + 1; - symtab_hdr->sh_addralign = bed->s->file_align; - - symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; - symstrtab_hdr->sh_type = SHT_STRTAB; - - outbound_syms = bfd_alloc (abfd, - (1 + symcount) * bed->s->sizeof_sym); - if (outbound_syms == NULL) - return false; - symtab_hdr->contents = (PTR) outbound_syms; - - /* now generate the data (for "contents") */ - { - /* Fill in zeroth symbol and swap it out. */ - Elf_Internal_Sym sym; - sym.st_name = 0; - sym.st_value = 0; - sym.st_size = 0; - sym.st_info = 0; - sym.st_other = 0; - sym.st_shndx = SHN_UNDEF; - bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); - outbound_syms += bed->s->sizeof_sym; - } - for (idx = 0; idx < symcount; idx++) - { - Elf_Internal_Sym sym; - bfd_vma value = syms[idx]->value; - elf_symbol_type *type_ptr; - flagword flags = syms[idx]->flags; - int type; - - if (flags & BSF_SECTION_SYM) - /* Section symbols have no names. */ - sym.st_name = 0; - else - { - sym.st_name = (unsigned long) _bfd_stringtab_add (stt, - syms[idx]->name, - true, false); - if (sym.st_name == (unsigned long) -1) - return false; - } - - type_ptr = elf_symbol_from (abfd, syms[idx]); - - if (bfd_is_com_section (syms[idx]->section)) - { - /* ELF common symbols put the alignment into the `value' field, - and the size into the `size' field. This is backwards from - how BFD handles it, so reverse it here. */ - sym.st_size = value; - if (type_ptr == NULL - || type_ptr->internal_elf_sym.st_value == 0) - sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value)); - else - sym.st_value = type_ptr->internal_elf_sym.st_value; - sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd, - syms[idx]->section); - } - else - { - asection *sec = syms[idx]->section; - int shndx; - - if (sec->output_section) - { - value += sec->output_offset; - sec = sec->output_section; - } - value += sec->vma; - sym.st_value = value; - sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0; - - if (bfd_is_abs_section (sec) - && type_ptr != NULL - && type_ptr->internal_elf_sym.st_shndx != 0) - { - /* This symbol is in a real ELF section which we did - not create as a BFD section. Undo the mapping done - by copy_private_symbol_data. */ - shndx = type_ptr->internal_elf_sym.st_shndx; - switch (shndx) - { - case MAP_ONESYMTAB: - shndx = elf_onesymtab (abfd); - break; - case MAP_DYNSYMTAB: - shndx = elf_dynsymtab (abfd); - break; - case MAP_STRTAB: - shndx = elf_tdata (abfd)->strtab_section; - break; - case MAP_SHSTRTAB: - shndx = elf_tdata (abfd)->shstrtab_section; - break; - default: - break; - } - } - else - { - shndx = _bfd_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); - shndx = _bfd_elf_section_from_bfd_section (abfd, sec2); - BFD_ASSERT (shndx != -1); - } - } - - sym.st_shndx = shndx; - } - - if ((flags & BSF_FUNCTION) != 0) - type = STT_FUNC; - else if ((flags & BSF_OBJECT) != 0) - type = STT_OBJECT; - else - type = STT_NOTYPE; - - if (bfd_is_com_section (syms[idx]->section)) - sym.st_info = ELF_ST_INFO (STB_GLOBAL, type); - else if (bfd_is_und_section (syms[idx]->section)) - sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK) - ? STB_WEAK - : STB_GLOBAL), - type); - else if (flags & BSF_SECTION_SYM) - sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); - else if (flags & BSF_FILE) - sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); - else - { - int bind = STB_LOCAL; - - if (flags & BSF_LOCAL) - bind = STB_LOCAL; - else if (flags & BSF_WEAK) - bind = STB_WEAK; - else if (flags & BSF_GLOBAL) - bind = STB_GLOBAL; - - sym.st_info = ELF_ST_INFO (bind, type); - } - - sym.st_other = 0; - bed->s->swap_symbol_out (abfd, &sym, (PTR) outbound_syms); - outbound_syms += bed->s->sizeof_sym; - } - - *sttp = stt; - symstrtab_hdr->sh_size = _bfd_stringtab_size (stt); - symstrtab_hdr->sh_type = SHT_STRTAB; - - symstrtab_hdr->sh_flags = 0; - symstrtab_hdr->sh_addr = 0; - symstrtab_hdr->sh_entsize = 0; - symstrtab_hdr->sh_link = 0; - symstrtab_hdr->sh_info = 0; - symstrtab_hdr->sh_addralign = 1; - } - - return true; -} - -/* Return the number of bytes required to hold the symtab vector. - - Note that we base it on the count plus 1, since we will null terminate - the vector allocated based on this size. However, the ELF symbol table - always has a dummy entry as symbol #0, so it ends up even. */ - -long -_bfd_elf_get_symtab_upper_bound (abfd) - bfd *abfd; -{ - long symcount; - long symtab_size; - Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr; - - symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; - symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); - - return symtab_size; -} - -long -_bfd_elf_get_dynamic_symtab_upper_bound (abfd) - bfd *abfd; -{ - long symcount; - long symtab_size; - Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr; - - if (elf_dynsymtab (abfd) == 0) - { - bfd_set_error (bfd_error_invalid_operation); - return -1; - } - - symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; - symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *)); - - return symtab_size; -} - -long -_bfd_elf_get_reloc_upper_bound (abfd, asect) - bfd *abfd; - sec_ptr asect; -{ - return (asect->reloc_count + 1) * sizeof (arelent *); -} - -/* Canonicalize the relocs. */ - -long -_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols) - bfd *abfd; - sec_ptr section; - arelent **relptr; - asymbol **symbols; -{ - arelent *tblptr; - unsigned int i; - - if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, section, symbols)) - return -1; - - tblptr = section->relocation; - for (i = 0; i < section->reloc_count; i++) - *relptr++ = tblptr++; - - *relptr = NULL; - - return section->reloc_count; -} - -long -_bfd_elf_get_symtab (abfd, alocation) - bfd *abfd; - asymbol **alocation; -{ - long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false); - - if (symcount >= 0) - bfd_get_symcount (abfd) = symcount; - return symcount; -} - -long -_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation) - bfd *abfd; - asymbol **alocation; -{ - return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true); -} - -asymbol * -_bfd_elf_make_empty_symbol (abfd) - bfd *abfd; -{ - elf_symbol_type *newsym; - - newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type)); - if (!newsym) - return NULL; - else - { - newsym->symbol.the_bfd = abfd; - return &newsym->symbol; - } -} - -void -_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret) - bfd *ignore_abfd; - asymbol *symbol; - symbol_info *ret; -{ - bfd_symbol_info (symbol, ret); -} - -alent * -_bfd_elf_get_lineno (ignore_abfd, symbol) - bfd *ignore_abfd; - asymbol *symbol; -{ - abort (); - return NULL; -} - -boolean -_bfd_elf_set_arch_mach (abfd, arch, machine) - bfd *abfd; - enum bfd_architecture arch; - unsigned long machine; -{ - /* If this isn't the right architecture for this backend, and this - isn't the generic backend, fail. */ - if (arch != get_elf_backend_data (abfd)->arch - && arch != bfd_arch_unknown - && get_elf_backend_data (abfd)->arch != bfd_arch_unknown) - return false; - - return bfd_default_set_arch_mach (abfd, arch, machine); -} - -/* Find the nearest line to a particular section and offset, for error - reporting. */ - -boolean -_bfd_elf_find_nearest_line (abfd, - section, - symbols, - offset, - filename_ptr, - functionname_ptr, - line_ptr) - bfd *abfd; - asection *section; - asymbol **symbols; - bfd_vma offset; - CONST char **filename_ptr; - CONST char **functionname_ptr; - unsigned int *line_ptr; -{ - boolean found; - const char *filename; - asymbol *func; - bfd_vma low_func; - asymbol **p; - - if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, - &found, filename_ptr, - functionname_ptr, line_ptr, - &elf_tdata (abfd)->line_info)) - return false; - if (found) - return true; - - if (symbols == NULL) - return false; - - filename = NULL; - func = NULL; - low_func = 0; - - for (p = symbols; *p != NULL; p++) - { - elf_symbol_type *q; - - q = (elf_symbol_type *) *p; - - if (bfd_get_section (&q->symbol) != section) - continue; - - switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) - { - default: - break; - case STT_FILE: - filename = bfd_asymbol_name (&q->symbol); - break; - case STT_FUNC: - if (q->symbol.section == section - && q->symbol.value >= low_func - && q->symbol.value <= offset) - { - func = (asymbol *) q; - low_func = q->symbol.value; - } - break; - } - } - - if (func == NULL) - return false; - - *filename_ptr = filename; - *functionname_ptr = bfd_asymbol_name (func); - *line_ptr = 0; - return true; -} - -int -_bfd_elf_sizeof_headers (abfd, reloc) - bfd *abfd; - boolean reloc; -{ - int ret; - - ret = get_elf_backend_data (abfd)->s->sizeof_ehdr; - if (! reloc) - ret += get_program_header_size (abfd); - return ret; -} - -boolean -_bfd_elf_set_section_contents (abfd, section, location, offset, count) - bfd *abfd; - sec_ptr section; - PTR location; - file_ptr offset; - bfd_size_type count; -{ - Elf_Internal_Shdr *hdr; - - if (! abfd->output_has_begun - && ! _bfd_elf_compute_section_file_positions (abfd, - (struct bfd_link_info *) NULL)) - return false; - - hdr = &elf_section_data (section)->this_hdr; - - if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1) - return false; - if (bfd_write (location, 1, count, abfd) != count) - return false; - - return true; -} - -void -_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd; - arelent *cache_ptr; - Elf_Internal_Rela *dst; -{ - abort (); -} - -#if 0 -void -_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst) - bfd *abfd; - arelent *cache_ptr; - Elf_Internal_Rel *dst; -{ - abort (); -} -#endif |