| /* 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. */ |
| |
| #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_type = -1; |
| static int output_elf_type = -1; |
| static int input_elf_osabi = -1; |
| static int output_elf_osabi = -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 class, machine, type, status, osabi; |
| |
| 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; |
| } |
| |
| /* Return if e_machine is the same as output_elf_machine. */ |
| if (output_elf_machine == elf_header.e_machine) |
| return 1; |
| |
| class = elf_header.e_ident[EI_CLASS]; |
| |
| /* Skip if class doesn't match. */ |
| if (input_elf_class != -1 && class != input_elf_class) |
| { |
| non_fatal |
| (_("%s: Unmatched EI_CLASS: %d is not %d\n"), |
| file_name, class, input_elf_class); |
| return 0; |
| } |
| |
| machine = elf_header.e_machine; |
| |
| /* Skip if e_machine doesn't match. */ |
| if (input_elf_machine != -1 && machine != input_elf_machine) |
| { |
| non_fatal |
| (_("%s: Unmatched e_machine: %d is not %d\n"), |
| file_name, machine, input_elf_machine); |
| return 0; |
| } |
| |
| type = elf_header.e_type; |
| |
| /* Skip if e_type doesn't match. */ |
| if (input_elf_type != -1 && type != input_elf_type) |
| { |
| non_fatal |
| (_("%s: Unmatched e_type: %d is not %d\n"), |
| file_name, type, input_elf_type); |
| return 0; |
| } |
| |
| osabi = elf_header.e_ident[EI_OSABI]; |
| |
| /* Skip if OSABI doesn't match. */ |
| if (input_elf_osabi != -1 && osabi != input_elf_osabi) |
| { |
| non_fatal |
| (_("%s: Unmatched EI_OSABI: %d is not %d\n"), |
| file_name, osabi, input_elf_osabi); |
| return 0; |
| } |
| |
| /* Update e_machine, e_type and EI_OSABI. */ |
| switch (class) |
| { |
| default: |
| /* We should never get here. */ |
| abort (); |
| break; |
| case ELFCLASS32: |
| if (output_elf_machine != -1) |
| BYTE_PUT (ehdr32.e_machine, output_elf_machine); |
| if (output_elf_type != -1) |
| BYTE_PUT (ehdr32.e_type, output_elf_type); |
| if (output_elf_osabi != -1) |
| ehdr32.e_ident[EI_OSABI] = output_elf_osabi; |
| status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1; |
| break; |
| case ELFCLASS64: |
| if (output_elf_machine != -1) |
| BYTE_PUT (ehdr64.e_machine, output_elf_machine); |
| if (output_elf_type != -1) |
| BYTE_PUT (ehdr64.e_type, output_elf_type); |
| if (output_elf_osabi != -1) |
| ehdr64.e_ident[EI_OSABI] = output_elf_osabi; |
| 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; |
| 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; |
| } |
| |
| 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; |
| } |
| |
| static const struct |
| { |
| int osabi; |
| const char *name; |
| } |
| osabis[] = |
| { |
| { ELFOSABI_NONE, "none" }, |
| { ELFOSABI_HPUX, "HPUX" }, |
| { ELFOSABI_NETBSD, "NetBSD" }, |
| { ELFOSABI_LINUX, "Linux" }, |
| { ELFOSABI_HURD, "Hurd" }, |
| { ELFOSABI_SOLARIS, "Solaris" }, |
| { ELFOSABI_AIX, "AIX" }, |
| { ELFOSABI_IRIX, "Irix" }, |
| { ELFOSABI_FREEBSD, "FreeBSD" }, |
| { ELFOSABI_TRU64, "TRU64" }, |
| { ELFOSABI_MODESTO, "Modesto" }, |
| { ELFOSABI_OPENBSD, "OpenBSD" }, |
| { ELFOSABI_OPENVMS, "OpenVMS" }, |
| { ELFOSABI_NSK, "NSK" }, |
| { ELFOSABI_AROS, "AROS" }, |
| { ELFOSABI_FENIXOS, "FenixOS" } |
| }; |
| |
| /* Return ELFOSABI_XXX for an OSABI string, OSABI. */ |
| |
| static int |
| elf_osabi (const char *osabi) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE (osabis); i++) |
| if (strcasecmp (osabi, osabis[i].name) == 0) |
| return osabis[i].osabi; |
| |
| non_fatal (_("Unknown OSABI: %s\n"), osabi); |
| |
| return -1; |
| } |
| |
| /* 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; |
| } |
| } |
| |
| /* Return ET_XXX for a type string, TYPE. */ |
| |
| static int |
| elf_type (const char *type) |
| { |
| if (strcasecmp (type, "rel") == 0) |
| return ET_REL; |
| if (strcasecmp (type, "exec") == 0) |
| return ET_EXEC; |
| if (strcasecmp (type, "dyn") == 0) |
| return ET_DYN; |
| if (strcasecmp (type, "none") == 0) |
| return ET_NONE; |
| |
| non_fatal (_("Unknown type: %s\n"), type); |
| |
| return -1; |
| } |
| |
| enum command_line_switch |
| { |
| OPTION_INPUT_MACH = 150, |
| OPTION_OUTPUT_MACH, |
| OPTION_INPUT_TYPE, |
| OPTION_OUTPUT_TYPE, |
| OPTION_INPUT_OSABI, |
| OPTION_OUTPUT_OSABI |
| }; |
| |
| static struct option options[] = |
| { |
| {"input-mach", required_argument, 0, OPTION_INPUT_MACH}, |
| {"output-mach", required_argument, 0, OPTION_OUTPUT_MACH}, |
| {"input-type", required_argument, 0, OPTION_INPUT_TYPE}, |
| {"output-type", required_argument, 0, OPTION_OUTPUT_TYPE}, |
| {"input-osabi", required_argument, 0, OPTION_INPUT_OSABI}, |
| {"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI}, |
| {"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)> 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\ |
| --input-type <type> Set input file type to <type>\n\ |
| --output-type <type> Set output file type to <type>\n\ |
| --input-osabi <osabi> Set input OSABI to <osabi>\n\ |
| --output-osabi <osabi> Set output OSABI to <osabi>\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 OPTION_INPUT_TYPE: |
| input_elf_type = elf_type (optarg); |
| if (input_elf_type < 0) |
| return 1; |
| break; |
| |
| case OPTION_OUTPUT_TYPE: |
| output_elf_type = elf_type (optarg); |
| if (output_elf_type < 0) |
| return 1; |
| break; |
| |
| case OPTION_INPUT_OSABI: |
| input_elf_osabi = elf_osabi (optarg); |
| if (input_elf_osabi < 0) |
| return 1; |
| break; |
| |
| case OPTION_OUTPUT_OSABI: |
| output_elf_osabi = elf_osabi (optarg); |
| if (output_elf_osabi < 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 |
| && output_elf_type == -1 |
| && output_elf_osabi == -1)) |
| usage (stderr, 1); |
| |
| status = 0; |
| while (optind < argc) |
| status |= process_file (argv[optind++]); |
| |
| return status; |
| } |