diff options
Diffstat (limited to 'lto-plugin/lto-plugin-elf.c')
| -rw-r--r-- | lto-plugin/lto-plugin-elf.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/lto-plugin/lto-plugin-elf.c b/lto-plugin/lto-plugin-elf.c deleted file mode 100644 index afd79dac056..00000000000 --- a/lto-plugin/lto-plugin-elf.c +++ /dev/null @@ -1,157 +0,0 @@ -/* LTO plugin for gold. - Copyright (C) 2009, 2010 Free Software Foundation, Inc. - Contributed by Rafael Avila de Espindola (espindola@google.com). - -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 3, 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; see the file COPYING3. If not see -<http://www.gnu.org/licenses/>. */ - -#include <assert.h> -#include <string.h> -#include <stdio.h> -#include <libiberty.h> -#include <stdlib.h> -#include <inttypes.h> - -/* The presence of gelf.h is checked by the toplevel configure script. */ -#include <gelf.h> - -/* Common definitions that the object format dependent code needs. */ -#include "lto-plugin.h" - -/* Process all lto symtabs of file ELF. */ - -static int -process_symtab (Elf *elf, struct plugin_symtab *out) -{ - int found = 0; - Elf_Scn *section = 0; - GElf_Ehdr header; - GElf_Ehdr *t = gelf_getehdr (elf, &header); - if (t == NULL) - return 0; - assert (t == &header); - - while ((section = elf_nextscn(elf, section)) != 0) - { - GElf_Shdr shdr; - GElf_Shdr *tshdr = gelf_getshdr (section, &shdr); - Elf_Data *symtab; - const char *t; - assert (tshdr == &shdr); - t = elf_strptr (elf, header.e_shstrndx, shdr.sh_name); - assert (t != NULL); - if (strncmp (t, LTO_SECTION_PREFIX, strlen (LTO_SECTION_PREFIX)) == 0) - { - char *s = strrchr (t, '.'); - if (s) - sscanf (s, ".%x", &out->id); - symtab = elf_getdata (section, NULL); - translate (symtab->d_buf, symtab->d_buf + symtab->d_size, out); - found++; - } - } - return found; -} - -/* Callback used by gold to check if the plugin will claim FILE. Writes - the result in CLAIMED. */ - -enum ld_plugin_status -claim_file_handler (const struct ld_plugin_input_file *file, int *claimed) -{ - enum ld_plugin_status status; - Elf *elf; - struct plugin_file_info lto_file; - int n; - - memset (<o_file, 0, sizeof (struct plugin_file_info)); - - if (file->offset != 0) - { - char *objname; - Elf *archive; - off_t offset; - /* We pass the offset of the actual file, not the archive header. */ - int t = asprintf (&objname, "%s@0x%" PRIx64, file->name, - (int64_t) file->offset); - check (t >= 0, LDPL_FATAL, "asprintf failed"); - lto_file.name = objname; - - archive = elf_begin (file->fd, ELF_C_READ, NULL); - check (elf_kind (archive) == ELF_K_AR, LDPL_FATAL, - "Not an archive and offset not 0"); - - /* elf_rand expects the offset to point to the ar header, not the - object itself. Subtract the size of the ar header (60 bytes). - We don't uses sizeof (struct ar_hd) to avoid including ar.h */ - - offset = file->offset - 60; - check (offset == elf_rand (archive, offset), LDPL_FATAL, - "could not seek in archive"); - elf = elf_begin (file->fd, ELF_C_READ, archive); - check (elf != NULL, LDPL_FATAL, "could not find archive member"); - elf_end (archive); - } - else - { - lto_file.name = xstrdup (file->name); - elf = elf_begin (file->fd, ELF_C_READ, NULL); - } - lto_file.handle = file->handle; - - *claimed = 0; - - if (!elf) - goto err; - - n = process_symtab (elf, <o_file.symtab); - if (n == 0) - goto err; - - if (n > 1) - resolve_conflicts (<o_file.symtab, <o_file.conflicts); - - status = add_symbols (file->handle, lto_file.symtab.nsyms, - lto_file.symtab.syms); - check (status == LDPS_OK, LDPL_FATAL, "could not add symbols"); - - *claimed = 1; - num_claimed_files++; - claimed_files = - xrealloc (claimed_files, - num_claimed_files * sizeof (struct plugin_file_info)); - claimed_files[num_claimed_files - 1] = lto_file; - - goto cleanup; - - err: - free (lto_file.name); - - cleanup: - if (elf) - elf_end (elf); - - return LDPS_OK; -} - -/* Method called first thing at onload time to perform sanity checks. */ - -enum ld_plugin_status -onload_format_checks (struct ld_plugin_tv *tv) -{ - unsigned version = elf_version (EV_CURRENT); - check (version != EV_NONE, LDPL_FATAL, "invalid ELF version"); - return LDPS_OK; -} - |