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- /* 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;
- table->hgot = NULL;
- table->stab_info = 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;
-
- /* 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);
-
- 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;
-
- if ((target_sect->flags & SEC_RELOC) == 0
- || target_sect->reloc_count == 0)
- hdr2 = &elf_section_data (target_sect)->rel_hdr;
- else
- {
- BFD_ASSERT (elf_section_data (target_sect)->rel_hdr2 == NULL);
- hdr2 = (Elf_Internal_Shdr *) bfd_alloc (abfd, sizeof (*hdr2));
- elf_section_data (target_sect)->rel_hdr2 = hdr2;
- }
- *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
- || asect->user_set_vma)
- 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. This is an
- approximation, since at this point we don't know exactly how many
- program headers we will need. */
- if (count > 0)
- {
- bfd_size_type phdr_size;
-
- phdr_size = elf_tdata (abfd)->program_header_size;
- if (phdr_size == 0)
- phdr_size = get_elf_backend_data (abfd)->s->sizeof_phdr;
- if (sections[0]->lma % maxpagesize < phdr_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, unless they're on
- the same page anyhow (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
- || (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size,
- maxpagesize)
- > hdr->lma))))
-
- {
- if ((hdr->flags & SEC_READONLY) == 0)
- writable = true;
- 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;
- else
- writable = false;
-
- 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;
- case bfd_arch_alpha:
- i_ehdrp->e_machine = EM_ALPHA;
- 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;
- asymbol **asym_ptr_ptr;
- {
- asymbol *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
-
- /* Try to convert a non-ELF reloc into an ELF one. */
-
- boolean
- _bfd_elf_validate_reloc (abfd, areloc)
- bfd *abfd;
- arelent *areloc;
- {
- /* Check whether we really have an ELF howto. */
-
- if ((*areloc->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec)
- {
- bfd_reloc_code_real_type code;
- reloc_howto_type *howto;
-
- /* Alien reloc: Try to determine its type to replace it with an
- equivalent ELF reloc. */
-
- if (areloc->howto->pc_relative)
- {
- switch (areloc->howto->bitsize)
- {
- case 8:
- code = BFD_RELOC_8_PCREL;
- break;
- case 12:
- code = BFD_RELOC_12_PCREL;
- break;
- case 16:
- code = BFD_RELOC_16_PCREL;
- break;
- case 24:
- code = BFD_RELOC_24_PCREL;
- break;
- case 32:
- code = BFD_RELOC_32_PCREL;
- break;
- case 64:
- code = BFD_RELOC_64_PCREL;
- break;
- default:
- goto fail;
- }
-
- howto = bfd_reloc_type_lookup (abfd, code);
-
- if (areloc->howto->pcrel_offset != howto->pcrel_offset)
- {
- if (howto->pcrel_offset)
- areloc->addend += areloc->address;
- else
- areloc->addend -= areloc->address; /* addend is unsigned!! */
- }
- }
- else
- {
- switch (areloc->howto->bitsize)
- {
- case 8:
- code = BFD_RELOC_8;
- break;
- case 14:
- code = BFD_RELOC_14;
- break;
- case 16:
- code = BFD_RELOC_16;
- break;
- case 26:
- code = BFD_RELOC_26;
- break;
- case 32:
- code = BFD_RELOC_32;
- break;
- case 64:
- code = BFD_RELOC_64;
- break;
- default:
- goto fail;
- }
-
- howto = bfd_reloc_type_lookup (abfd, code);
- }
-
- if (howto)
- areloc->howto = howto;
- else
- goto fail;
- }
-
- return true;
-
- fail:
- (*_bfd_error_handler)
- ("%s: unsupported relocation type %s",
- bfd_get_filename (abfd), areloc->howto->name);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
-