--- /dev/null
+/* elfedit.c -- Update the ELF header of an ELF format file
+ Copyright 2010
+ Free Software Foundation, Inc.
+
+ This file is part of GNU Binutils.
+
+ 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 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., 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+\f
+#include "config.h"
+#include "sysdep.h"
+#include <assert.h>
+#include <sys/stat.h>
+
+#if __GNUC__ >= 2
+/* Define BFD64 here, even if our default architecture is 32 bit ELF
+ as this will allow us to read in and parse 64bit and 32bit ELF files.
+ Only do this if we believe that the compiler can support a 64 bit
+ data type. For now we only rely on GCC being able to do this. */
+#define BFD64
+#endif
+
+#include "bfd.h"
+#include "bucomm.h"
+
+#include "elf/common.h"
+#include "elf/external.h"
+#include "elf/internal.h"
+
+
+#include "aout/ar.h"
+
+#include "getopt.h"
+#include "libiberty.h"
+#include "safe-ctype.h"
+#include "filenames.h"
+
+char * program_name = "elfedit";
+static long archive_file_offset;
+static unsigned long archive_file_size;
+static Elf_Internal_Ehdr elf_header;
+static Elf32_External_Ehdr ehdr32;
+static Elf64_External_Ehdr ehdr64;
+static int input_elf_machine = -1;
+static int output_elf_machine = -1;
+static int input_elf_class = -1;
+
+#define streq(a,b) (strcmp ((a), (b)) == 0)
+#define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0)
+#define const_strneq(a,b) (strncmp ((a), (b), sizeof (b) - 1) == 0)
+
+void
+non_fatal (const char *message, ...)
+{
+ va_list args;
+
+ va_start (args, message);
+ fprintf (stderr, _("%s: Error: "), program_name);
+ vfprintf (stderr, message, args);
+ va_end (args);
+}
+
+#define BYTE_GET(field) byte_get (field, sizeof (field))
+#define BYTE_PUT(field, val) byte_put (field, val, sizeof (field))
+
+static bfd_vma (*byte_get) (unsigned char *, int);
+static void (*byte_put) (unsigned char *, bfd_vma, int);
+
+static bfd_vma
+byte_get_little_endian (unsigned char *field, int size)
+{
+ switch (size)
+ {
+ case 1:
+ return *field;
+
+ case 2:
+ return ((unsigned int) (field[0]))
+ | (((unsigned int) (field[1])) << 8);
+
+ case 4:
+ return ((unsigned long) (field[0]))
+ | (((unsigned long) (field[1])) << 8)
+ | (((unsigned long) (field[2])) << 16)
+ | (((unsigned long) (field[3])) << 24);
+
+ case 8:
+ if (sizeof (bfd_vma) == 8)
+ return ((bfd_vma) (field[0]))
+ | (((bfd_vma) (field[1])) << 8)
+ | (((bfd_vma) (field[2])) << 16)
+ | (((bfd_vma) (field[3])) << 24)
+ | (((bfd_vma) (field[4])) << 32)
+ | (((bfd_vma) (field[5])) << 40)
+ | (((bfd_vma) (field[6])) << 48)
+ | (((bfd_vma) (field[7])) << 56);
+ else if (sizeof (bfd_vma) == 4)
+ /* We want to extract data from an 8 byte wide field and
+ place it into a 4 byte wide field. Since this is a little
+ endian source we can just use the 4 byte extraction code. */
+ return ((unsigned long) (field[0]))
+ | (((unsigned long) (field[1])) << 8)
+ | (((unsigned long) (field[2])) << 16)
+ | (((unsigned long) (field[3])) << 24);
+
+ default:
+ non_fatal (_("Unhandled data length: %d\n"), size);
+ abort ();
+ }
+}
+
+static bfd_vma
+byte_get_big_endian (unsigned char *field, int size)
+{
+ switch (size)
+ {
+ case 1:
+ return *field;
+
+ case 2:
+ return ((unsigned int) (field[1])) | (((int) (field[0])) << 8);
+
+ case 4:
+ return ((unsigned long) (field[3]))
+ | (((unsigned long) (field[2])) << 8)
+ | (((unsigned long) (field[1])) << 16)
+ | (((unsigned long) (field[0])) << 24);
+
+ case 8:
+ if (sizeof (bfd_vma) == 8)
+ return ((bfd_vma) (field[7]))
+ | (((bfd_vma) (field[6])) << 8)
+ | (((bfd_vma) (field[5])) << 16)
+ | (((bfd_vma) (field[4])) << 24)
+ | (((bfd_vma) (field[3])) << 32)
+ | (((bfd_vma) (field[2])) << 40)
+ | (((bfd_vma) (field[1])) << 48)
+ | (((bfd_vma) (field[0])) << 56);
+ else if (sizeof (bfd_vma) == 4)
+ {
+ /* Although we are extracing data from an 8 byte wide field,
+ we are returning only 4 bytes of data. */
+ field += 4;
+ return ((unsigned long) (field[3]))
+ | (((unsigned long) (field[2])) << 8)
+ | (((unsigned long) (field[1])) << 16)
+ | (((unsigned long) (field[0])) << 24);
+ }
+
+ default:
+ non_fatal (_("Unhandled data length: %d\n"), size);
+ abort ();
+ }
+}
+
+static void
+byte_put_little_endian (unsigned char * field, bfd_vma value, int size)
+{
+ switch (size)
+ {
+ case 8:
+ field[7] = (((value >> 24) >> 24) >> 8) & 0xff;
+ field[6] = ((value >> 24) >> 24) & 0xff;
+ field[5] = ((value >> 24) >> 16) & 0xff;
+ field[4] = ((value >> 24) >> 8) & 0xff;
+ /* Fall through. */
+ case 4:
+ field[3] = (value >> 24) & 0xff;
+ field[2] = (value >> 16) & 0xff;
+ /* Fall through. */
+ case 2:
+ field[1] = (value >> 8) & 0xff;
+ /* Fall through. */
+ case 1:
+ field[0] = value & 0xff;
+ break;
+
+ default:
+ non_fatal (_("Unhandled data length: %d\n"), size);
+ abort ();
+ }
+}
+
+static void
+byte_put_big_endian (unsigned char * field, bfd_vma value, int size)
+{
+ switch (size)
+ {
+ case 8:
+ field[7] = value & 0xff;
+ field[6] = (value >> 8) & 0xff;
+ field[5] = (value >> 16) & 0xff;
+ field[4] = (value >> 24) & 0xff;
+ value >>= 16;
+ value >>= 16;
+ /* Fall through. */
+ case 4:
+ field[3] = value & 0xff;
+ field[2] = (value >> 8) & 0xff;
+ value >>= 16;
+ /* Fall through. */
+ case 2:
+ field[1] = value & 0xff;
+ value >>= 8;
+ /* Fall through. */
+ case 1:
+ field[0] = value & 0xff;
+ break;
+
+ default:
+ non_fatal (_("Unhandled data length: %d\n"), size);
+ abort ();
+ }
+}
+
+static int
+update_elf_header (const char *file_name, FILE *file)
+{
+ int status;
+
+ if (elf_header.e_ident[EI_MAG0] != ELFMAG0
+ || elf_header.e_ident[EI_MAG1] != ELFMAG1
+ || elf_header.e_ident[EI_MAG2] != ELFMAG2
+ || elf_header.e_ident[EI_MAG3] != ELFMAG3)
+ {
+ non_fatal
+ (_("%s: Not an ELF file - wrong magic bytes at the start\n"),
+ file_name);
+ return 0;
+ }
+
+ if (elf_header.e_ident[EI_VERSION] != EV_CURRENT)
+ {
+ non_fatal
+ (_("%s: Unsupported EI_VERSION: %d is not %d\n"),
+ file_name, elf_header.e_ident[EI_VERSION],
+ EV_CURRENT);
+ return 0;
+ }
+
+ /* Skip if class doesn't match. */
+ if (input_elf_class == -1)
+ input_elf_class = elf_header.e_ident[EI_CLASS];
+ else
+ if (elf_header.e_ident[EI_CLASS] != input_elf_class)
+ {
+ non_fatal
+ (_("%s: Unmatched EI_CLASS: %d is not %d\n"),
+ file_name, elf_header.e_ident[EI_CLASS],
+ input_elf_class);
+ return 0;
+ }
+
+ /* Return if e_machine is the same as output_elf_machine. */
+ if (output_elf_machine == elf_header.e_machine)
+ return 1;
+
+ /* Skip if e_machine doesn't match. */
+ if (input_elf_machine == -1)
+ input_elf_machine = elf_header.e_machine;
+ else if (elf_header.e_machine != input_elf_machine)
+ {
+ non_fatal
+ (_("%s: Unmatched e_machine: %d is not %d\n"),
+ file_name, elf_header.e_machine, input_elf_machine);
+ return 0;
+ }
+
+ /* Update e_machine. */
+ switch (input_elf_class)
+ {
+ default:
+ /* We should never get here. */
+ abort ();
+ break;
+ case ELFCLASS32:
+ BYTE_PUT (ehdr32.e_machine, output_elf_machine);
+ status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1;
+ break;
+ case ELFCLASS64:
+ BYTE_PUT (ehdr64.e_machine, output_elf_machine);
+ status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1;
+ break;
+ }
+
+ if (status != 1)
+ non_fatal (_("%s: Failed to update ELF header: %s\n"),
+ file_name, strerror (errno));
+
+ return status;
+}
+
+static int
+get_file_header (FILE * file)
+{
+ /* Read in the identity array. */
+ if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1)
+ return 0;
+
+ /* Determine how to read the rest of the header. */
+ switch (elf_header.e_ident[EI_DATA])
+ {
+ default: /* fall through */
+ case ELFDATANONE: /* fall through */
+ case ELFDATA2LSB:
+ byte_get = byte_get_little_endian;
+ byte_put = byte_put_little_endian;
+ break;
+ case ELFDATA2MSB:
+ byte_get = byte_get_big_endian;
+ byte_put = byte_put_big_endian;
+ break;
+ }
+
+ /* Read in the rest of the header. For now we only support 32 bit
+ and 64 bit ELF files. */
+ switch (elf_header.e_ident[EI_CLASS])
+ {
+ default:
+ non_fatal (_("Unsupported EI_CLASS: %d\n"),
+ elf_header.e_ident[EI_CLASS]);
+ return 0;
+
+ case ELFCLASS32:
+ if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT,
+ 1, file) != 1)
+ return 0;
+
+ elf_header.e_type = BYTE_GET (ehdr32.e_type);
+ elf_header.e_machine = BYTE_GET (ehdr32.e_machine);
+ elf_header.e_version = BYTE_GET (ehdr32.e_version);
+ elf_header.e_entry = BYTE_GET (ehdr32.e_entry);
+ elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff);
+ elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff);
+ elf_header.e_flags = BYTE_GET (ehdr32.e_flags);
+ elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize);
+ elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize);
+ elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum);
+ elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize);
+ elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum);
+ elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx);
+
+ memcpy (&ehdr32, &elf_header, EI_NIDENT);
+ break;
+
+ case ELFCLASS64:
+ /* If we have been compiled with sizeof (bfd_vma) == 4, then
+ we will not be able to cope with the 64bit data found in
+ 64 ELF files. Detect this now and abort before we start
+ overwriting things. */
+ if (sizeof (bfd_vma) < 8)
+ {
+ non_fatal (_("This executable has been built without support for a\n\
+64 bit data type and so it cannot process 64 bit ELF files.\n"));
+ return 0;
+ }
+
+ if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT,
+ 1, file) != 1)
+ return 0;
+
+ elf_header.e_type = BYTE_GET (ehdr64.e_type);
+ elf_header.e_machine = BYTE_GET (ehdr64.e_machine);
+ elf_header.e_version = BYTE_GET (ehdr64.e_version);
+ elf_header.e_entry = BYTE_GET (ehdr64.e_entry);
+ elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff);
+ elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff);
+ elf_header.e_flags = BYTE_GET (ehdr64.e_flags);
+ elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize);
+ elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize);
+ elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum);
+ elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize);
+ elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum);
+ elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx);
+
+ memcpy (&ehdr64, &elf_header, EI_NIDENT);
+ break;
+ }
+ return 1;
+}
+
+/* Process one ELF object file according to the command line options.
+ This file may actually be stored in an archive. The file is
+ positioned at the start of the ELF object. */
+
+static int
+process_object (const char *file_name, FILE *file)
+{
+ /* Rememeber where we are. */
+ long offset = ftell (file);
+
+ if (! get_file_header (file))
+ {
+ non_fatal (_("%s: Failed to read ELF header\n"), file_name);
+ return 1;
+ }
+
+ /* Go to the position of the ELF header. */
+ if (fseek (file, offset, SEEK_SET) != 0)
+ {
+ non_fatal (_("%s: Failed to seek to ELF header\n"), file_name);
+ }
+
+ if (! update_elf_header (file_name, file))
+ return 1;
+
+ return 0;
+}
+
+/* Return the path name for a proxy entry in a thin archive, adjusted relative
+ to the path name of the thin archive itself if necessary. Always returns
+ a pointer to malloc'ed memory. */
+
+static char *
+adjust_relative_path (const char *file_name, char * name, int name_len)
+{
+ char * member_file_name;
+ const char * base_name = lbasename (file_name);
+
+ /* This is a proxy entry for a thin archive member.
+ If the extended name table contains an absolute path
+ name, or if the archive is in the current directory,
+ use the path name as given. Otherwise, we need to
+ find the member relative to the directory where the
+ archive is located. */
+ if (IS_ABSOLUTE_PATH (name) || base_name == file_name)
+ {
+ member_file_name = malloc (name_len + 1);
+ if (member_file_name == NULL)
+ {
+ non_fatal (_("Out of memory\n"));
+ return NULL;
+ }
+ memcpy (member_file_name, name, name_len);
+ member_file_name[name_len] = '\0';
+ }
+ else
+ {
+ /* Concatenate the path components of the archive file name
+ to the relative path name from the extended name table. */
+ size_t prefix_len = base_name - file_name;
+ member_file_name = malloc (prefix_len + name_len + 1);
+ if (member_file_name == NULL)
+ {
+ non_fatal (_("Out of memory\n"));
+ return NULL;
+ }
+ memcpy (member_file_name, file_name, prefix_len);
+ memcpy (member_file_name + prefix_len, name, name_len);
+ member_file_name[prefix_len + name_len] = '\0';
+ }
+ return member_file_name;
+}
+
+/* Structure to hold information about an archive file. */
+
+struct archive_info
+{
+ char * file_name; /* Archive file name. */
+ FILE * file; /* Open file descriptor. */
+ unsigned long index_num; /* Number of symbols in table. */
+ unsigned long * index_array; /* The array of member offsets. */
+ char * sym_table; /* The symbol table. */
+ unsigned long sym_size; /* Size of the symbol table. */
+ char * longnames; /* The long file names table. */
+ unsigned long longnames_size; /* Size of the long file names table. */
+ unsigned long nested_member_origin; /* Origin in the nested archive of the current member. */
+ unsigned long next_arhdr_offset; /* Offset of the next archive header. */
+ bfd_boolean is_thin_archive; /* TRUE if this is a thin archive. */
+ struct ar_hdr arhdr; /* Current archive header. */
+};
+
+/* Read the symbol table and long-name table from an archive. */
+
+static int
+setup_archive (struct archive_info * arch, const char * file_name,
+ FILE * file, bfd_boolean is_thin_archive)
+{
+ size_t got;
+ unsigned long size;
+
+ arch->file_name = strdup (file_name);
+ arch->file = file;
+ arch->index_num = 0;
+ arch->index_array = NULL;
+ arch->sym_table = NULL;
+ arch->sym_size = 0;
+ arch->longnames = NULL;
+ arch->longnames_size = 0;
+ arch->nested_member_origin = 0;
+ arch->is_thin_archive = is_thin_archive;
+ arch->next_arhdr_offset = SARMAG;
+
+ /* Read the first archive member header. */
+ if (fseek (file, SARMAG, SEEK_SET) != 0)
+ {
+ non_fatal (_("%s: failed to seek to first archive header\n"),
+ file_name);
+ return 1;
+ }
+ got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file);
+ if (got != sizeof arch->arhdr)
+ {
+ if (got == 0)
+ return 0;
+
+ non_fatal (_("%s: failed to read archive header\n"), file_name);
+ return 1;
+ }
+
+ /* See if this is the archive symbol table. */
+ if (const_strneq (arch->arhdr.ar_name, "/ ")
+ || const_strneq (arch->arhdr.ar_name, "/SYM64/ "))
+ {
+ size = strtoul (arch->arhdr.ar_size, NULL, 10);
+ size = size + (size & 1);
+
+ arch->next_arhdr_offset += sizeof arch->arhdr + size;
+
+ if (fseek (file, size, SEEK_CUR) != 0)
+ {
+ non_fatal (_("%s: failed to skip archive symbol table\n"),
+ file_name);
+ return 1;
+ }
+
+ /* Read the next archive header. */
+ got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file);
+ if (got != sizeof arch->arhdr)
+ {
+ if (got == 0)
+ return 0;
+ non_fatal (_("%s: failed to read archive header following archive index\n"),
+ file_name);
+ return 1;
+ }
+ }
+
+ if (const_strneq (arch->arhdr.ar_name, "// "))
+ {
+ /* This is the archive string table holding long member names. */
+ arch->longnames_size = strtoul (arch->arhdr.ar_size, NULL, 10);
+ arch->next_arhdr_offset += sizeof arch->arhdr + arch->longnames_size;
+
+ arch->longnames = malloc (arch->longnames_size);
+ if (arch->longnames == NULL)
+ {
+ non_fatal (_("Out of memory reading long symbol names in archive\n"));
+ return 1;
+ }
+
+ if (fread (arch->longnames, arch->longnames_size, 1, file) != 1)
+ {
+ free (arch->longnames);
+ arch->longnames = NULL;
+ non_fatal (_("%s: failed to read long symbol name string table\n")
+ , file_name);
+ return 1;
+ }
+
+ if ((arch->longnames_size & 1) != 0)
+ getc (file);
+ }
+
+ return 0;
+}
+
+/* Release the memory used for the archive information. */
+
+static void
+release_archive (struct archive_info * arch)
+{
+ if (arch->file_name != NULL)
+ free (arch->file_name);
+ if (arch->index_array != NULL)
+ free (arch->index_array);
+ if (arch->sym_table != NULL)
+ free (arch->sym_table);
+ if (arch->longnames != NULL)
+ free (arch->longnames);
+}
+
+/* Open and setup a nested archive, if not already open. */
+
+static int
+setup_nested_archive (struct archive_info * nested_arch, char * member_file_name)
+{
+ FILE * member_file;
+
+ /* Have we already setup this archive? */
+ if (nested_arch->file_name != NULL
+ && streq (nested_arch->file_name, member_file_name))
+ return 0;
+
+ /* Close previous file and discard cached information. */
+ if (nested_arch->file != NULL)
+ fclose (nested_arch->file);
+ release_archive (nested_arch);
+
+ member_file = fopen (member_file_name, "r+b");
+ if (member_file == NULL)
+ return 1;
+ return setup_archive (nested_arch, member_file_name, member_file,
+ FALSE);
+}
+
+static char *
+get_archive_member_name_at (struct archive_info * arch,
+ unsigned long offset,
+ struct archive_info * nested_arch);
+
+/* Get the name of an archive member from the current archive header.
+ For simple names, this will modify the ar_name field of the current
+ archive header. For long names, it will return a pointer to the
+ longnames table. For nested archives, it will open the nested archive
+ and get the name recursively. NESTED_ARCH is a single-entry cache so
+ we don't keep rereading the same information from a nested archive. */
+
+static char *
+get_archive_member_name (struct archive_info * arch,
+ struct archive_info * nested_arch)
+{
+ unsigned long j, k;
+
+ if (arch->arhdr.ar_name[0] == '/')
+ {
+ /* We have a long name. */
+ char * endp;
+ char * member_file_name;
+ char * member_name;
+
+ arch->nested_member_origin = 0;
+ k = j = strtoul (arch->arhdr.ar_name + 1, &endp, 10);
+ if (arch->is_thin_archive && endp != NULL && * endp == ':')
+ arch->nested_member_origin = strtoul (endp + 1, NULL, 10);
+
+ while ((j < arch->longnames_size)
+ && (arch->longnames[j] != '\n')
+ && (arch->longnames[j] != '\0'))
+ j++;
+ if (arch->longnames[j-1] == '/')
+ j--;
+ arch->longnames[j] = '\0';
+
+ if (!arch->is_thin_archive || arch->nested_member_origin == 0)
+ return arch->longnames + k;
+
+ /* This is a proxy for a member of a nested archive.
+ Find the name of the member in that archive. */
+ member_file_name = adjust_relative_path (arch->file_name,
+ arch->longnames + k,
+ j - k);
+ if (member_file_name != NULL
+ && setup_nested_archive (nested_arch, member_file_name) == 0
+ && (member_name = get_archive_member_name_at (nested_arch,
+ arch->nested_member_origin,
+ NULL)) != NULL)
+ {
+ free (member_file_name);
+ return member_name;
+ }
+ free (member_file_name);
+
+ /* Last resort: just return the name of the nested archive. */
+ return arch->longnames + k;
+ }
+
+ /* We have a normal (short) name. */
+ j = 0;
+ while ((arch->arhdr.ar_name[j] != '/') && (j < 16))
+ j++;
+ arch->arhdr.ar_name[j] = '\0';
+ return arch->arhdr.ar_name;
+}
+
+/* Get the name of an archive member at a given OFFSET within an
+ archive ARCH. */
+
+static char *
+get_archive_member_name_at (struct archive_info * arch,
+ unsigned long offset,
+ struct archive_info * nested_arch)
+{
+ size_t got;
+
+ if (fseek (arch->file, offset, SEEK_SET) != 0)
+ {
+ non_fatal (_("%s: failed to seek to next file name\n"),
+ arch->file_name);
+ return NULL;
+ }
+ got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file);
+ if (got != sizeof arch->arhdr)
+ {
+ non_fatal (_("%s: failed to read archive header\n"),
+ arch->file_name);
+ return NULL;
+ }
+ if (memcmp (arch->arhdr.ar_fmag, ARFMAG, 2) != 0)
+ {
+ non_fatal (_("%s: did not find a valid archive header\n"),
+ arch->file_name);
+ return NULL;
+ }
+
+ return get_archive_member_name (arch, nested_arch);
+}
+
+/* Construct a string showing the name of the archive member, qualified
+ with the name of the containing archive file. For thin archives, we
+ use square brackets to denote the indirection. For nested archives,
+ we show the qualified name of the external member inside the square
+ brackets (e.g., "thin.a[normal.a(foo.o)]"). */
+
+static char *
+make_qualified_name (struct archive_info * arch,
+ struct archive_info * nested_arch,
+ char * member_name)
+{
+ size_t len;
+ char * name;
+
+ len = strlen (arch->file_name) + strlen (member_name) + 3;
+ if (arch->is_thin_archive && arch->nested_member_origin != 0)
+ len += strlen (nested_arch->file_name) + 2;
+
+ name = malloc (len);
+ if (name == NULL)
+ {
+ non_fatal (_("Out of memory\n"));
+ return NULL;
+ }
+
+ if (arch->is_thin_archive && arch->nested_member_origin != 0)
+ snprintf (name, len, "%s[%s(%s)]", arch->file_name, nested_arch->file_name, member_name);
+ else if (arch->is_thin_archive)
+ snprintf (name, len, "%s[%s]", arch->file_name, member_name);
+ else
+ snprintf (name, len, "%s(%s)", arch->file_name, member_name);
+
+ return name;
+}
+
+/* Process an ELF archive.
+ On entry the file is positioned just after the ARMAG string. */
+
+static int
+process_archive (const char * file_name, FILE * file,
+ bfd_boolean is_thin_archive)
+{
+ struct archive_info arch;
+ struct archive_info nested_arch;
+ size_t got;
+ size_t file_name_size;
+ int ret;
+
+ /* The ARCH structure is used to hold information about this archive. */
+ arch.file_name = NULL;
+ arch.file = NULL;
+ arch.index_array = NULL;
+ arch.sym_table = NULL;
+ arch.longnames = NULL;
+
+ /* The NESTED_ARCH structure is used as a single-item cache of information
+ about a nested archive (when members of a thin archive reside within
+ another regular archive file). */
+ nested_arch.file_name = NULL;
+ nested_arch.file = NULL;
+ nested_arch.index_array = NULL;
+ nested_arch.sym_table = NULL;
+ nested_arch.longnames = NULL;
+
+ if (setup_archive (&arch, file_name, file, is_thin_archive) != 0)
+ {
+ ret = 1;
+ goto out;
+ }
+
+ file_name_size = strlen (file_name);
+ ret = 0;
+
+ while (1)
+ {
+ char * name;
+ size_t namelen;
+ char * qualified_name;
+
+ /* Read the next archive header. */
+ if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0)
+ {
+ non_fatal (_("%s: failed to seek to next archive header\n"),
+ file_name);
+ return 1;
+ }
+ got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file);
+ if (got != sizeof arch.arhdr)
+ {
+ if (got == 0)
+ break;
+ non_fatal (_("%s: failed to read archive header\n"),
+ file_name);
+ ret = 1;
+ break;
+ }
+ if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0)
+ {
+ non_fatal (_("%s: did not find a valid archive header\n"),
+ arch.file_name);
+ ret = 1;
+ break;
+ }
+
+ arch.next_arhdr_offset += sizeof arch.arhdr;
+
+ archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10);
+ if (archive_file_size & 01)
+ ++archive_file_size;
+
+ name = get_archive_member_name (&arch, &nested_arch);
+ if (name == NULL)
+ {
+ non_fatal (_("%s: bad archive file name\n"), file_name);
+ ret = 1;
+ break;
+ }
+ namelen = strlen (name);
+
+ qualified_name = make_qualified_name (&arch, &nested_arch, name);
+ if (qualified_name == NULL)
+ {
+ non_fatal (_("%s: bad archive file name\n"), file_name);
+ ret = 1;
+ break;
+ }
+
+ if (is_thin_archive && arch.nested_member_origin == 0)
+ {
+ /* This is a proxy for an external member of a thin archive. */
+ FILE *member_file;
+ char *member_file_name = adjust_relative_path (file_name,
+ name, namelen);
+ if (member_file_name == NULL)
+ {
+ ret = 1;
+ break;
+ }
+
+ member_file = fopen (member_file_name, "r+b");
+ if (member_file == NULL)
+ {
+ non_fatal (_("Input file '%s' is not readable\n"),
+ member_file_name);
+ free (member_file_name);
+ ret = 1;
+ break;
+ }
+
+ archive_file_offset = arch.nested_member_origin;
+
+ ret |= process_object (qualified_name, member_file);
+
+ fclose (member_file);
+ free (member_file_name);
+ }
+ else if (is_thin_archive)
+ {
+ /* This is a proxy for a member of a nested archive. */
+ archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr;
+
+ /* The nested archive file will have been opened and setup by
+ get_archive_member_name. */
+ if (fseek (nested_arch.file, archive_file_offset,
+ SEEK_SET) != 0)
+ {
+ non_fatal (_("%s: failed to seek to archive member\n"),
+ nested_arch.file_name);
+ ret = 1;
+ break;
+ }
+
+ ret |= process_object (qualified_name, nested_arch.file);
+ }
+ else
+ {
+ archive_file_offset = arch.next_arhdr_offset;
+ arch.next_arhdr_offset += archive_file_size;
+
+ ret |= process_object (qualified_name, file);
+ }
+
+ free (qualified_name);
+ }
+
+ out:
+ if (nested_arch.file != NULL)
+ fclose (nested_arch.file);
+ release_archive (&nested_arch);
+ release_archive (&arch);
+
+ return ret;
+}
+
+static int
+check_file (const char *file_name, struct stat *statbuf_p)
+{
+ struct stat statbuf;
+
+ if (statbuf_p == NULL)
+ statbuf_p = &statbuf;
+
+ if (stat (file_name, statbuf_p) < 0)
+ {
+ if (errno == ENOENT)
+ non_fatal (_("'%s': No such file\n"), file_name);
+ else
+ non_fatal (_("Could not locate '%s'. System error message: %s\n"),
+ file_name, strerror (errno));
+ return 1;
+ }
+
+ if (! S_ISREG (statbuf_p->st_mode))
+ {
+ non_fatal (_("'%s' is not an ordinary file\n"), file_name);
+ return 1;
+ }
+
+ return 0;
+}
+
+static int
+process_file (const char *file_name)
+{
+ FILE * file;
+ char armag[SARMAG];
+ int ret;
+
+ if (check_file (file_name, NULL))
+ return 1;
+
+ file = fopen (file_name, "r+b");
+ if (file == NULL)
+ {
+ non_fatal (_("Input file '%s' is not readable\n"), file_name);
+ return 1;
+ }
+
+ if (fread (armag, SARMAG, 1, file) != 1)
+ {
+ non_fatal (_("%s: Failed to read file's magic number\n"),
+ file_name);
+ fclose (file);
+ return 1;
+ }
+
+ if (memcmp (armag, ARMAG, SARMAG) == 0)
+ ret = process_archive (file_name, file, FALSE);
+ else if (memcmp (armag, ARMAGT, SARMAG) == 0)
+ ret = process_archive (file_name, file, TRUE);
+ else
+ {
+ rewind (file);
+ archive_file_size = archive_file_offset = 0;
+ ret = process_object (file_name, file);
+ }
+
+ fclose (file);
+
+ return ret;
+}
+
+/* Return EM_XXX for a machine string, MACH. */
+
+static int
+elf_machine (const char *mach)
+{
+ if (strcasecmp (mach, "l1om") == 0)
+ return EM_L1OM;
+ if (strcasecmp (mach, "x86_64") == 0)
+ return EM_X86_64;
+ if (strcasecmp (mach, "x86-64") == 0)
+ return EM_X86_64;
+ if (strcasecmp (mach, "none") == 0)
+ return EM_NONE;
+
+ non_fatal (_("Unknown machine type: %s\n"), mach);
+
+ return -1;
+}
+
+/* Return ELF class for a machine type, MACH. */
+
+static int
+elf_class (int mach)
+{
+ switch (mach)
+ {
+ case EM_L1OM:
+ case EM_X86_64:
+ return ELFCLASS64;
+ case EM_NONE:
+ return ELFCLASSNONE;
+ default:
+ non_fatal (_("Unknown machine type: %d\n"), mach);
+ return -1;
+ }
+}
+
+enum command_line_switch
+ {
+ OPTION_INPUT_MACH = 150,
+ OPTION_OUTPUT_MACH
+ };
+
+static struct option options[] =
+{
+ {"input-mach", required_argument, 0, OPTION_INPUT_MACH},
+ {"output-mach", required_argument, 0, OPTION_OUTPUT_MACH},
+ {"version", no_argument, 0, 'v'},
+ {"help", no_argument, 0, 'h'},
+ {0, no_argument, 0, 0}
+};
+
+static void
+usage (FILE *stream, int exit_status)
+{
+ fprintf (stream, _("Usage: %s [option(s)] --output-mach <machine> elffile(s)\n"),
+ program_name);
+ fprintf (stream, _(" Update the ELF header of ELF files\n"));
+ fprintf (stream, _(" The options are:\n"));
+ fprintf (stream, _("\
+ --input-mach <machine> Set input machine type to <machine>\n\
+ --output-mach <machine> Set output machine type to <machine>\n\
+ -h --help Display this information\n\
+ -v --version Display the version number of %s\n\
+"),
+ program_name);
+ if (REPORT_BUGS_TO[0] && exit_status == 0)
+ fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
+ exit (exit_status);
+}
+
+int
+main (int argc, char ** argv)
+{
+ int c, status;
+
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+ setlocale (LC_MESSAGES, "");
+#endif
+#if defined (HAVE_SETLOCALE)
+ setlocale (LC_CTYPE, "");
+#endif
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
+
+ expandargv (&argc, &argv);
+
+ while ((c = getopt_long (argc, argv, "hv",
+ options, (int *) 0)) != EOF)
+ {
+ switch (c)
+ {
+ case OPTION_INPUT_MACH:
+ input_elf_machine = elf_machine (optarg);
+ if (input_elf_machine < 0)
+ return 1;
+ input_elf_class = elf_class (input_elf_machine);
+ if (input_elf_class < 0)
+ return 1;
+ break;
+
+ case OPTION_OUTPUT_MACH:
+ output_elf_machine = elf_machine (optarg);
+ if (output_elf_machine < 0)
+ return 1;
+ break;
+
+ case 'h':
+ usage (stdout, 0);
+
+ case 'v':
+ print_version (program_name);
+ break;
+
+ default:
+ usage (stderr, 1);
+ }
+ }
+
+ if (optind == argc || output_elf_machine == -1)
+ usage (stderr, 1);
+
+ status = 0;
+ while (optind < argc)
+ status |= process_file (argv[optind++]);
+
+ return status;
+}
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