diff options
Diffstat (limited to 'src/tests/update3.c')
| -rw-r--r-- | src/tests/update3.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/src/tests/update3.c b/src/tests/update3.c new file mode 100644 index 00000000..d760687a --- /dev/null +++ b/src/tests/update3.c @@ -0,0 +1,205 @@ +/* Test program for elf_update function. + Copyright (C) 2000, 2002, 2005 Red Hat, Inc. + This file is part of elfutils. + Written by Ulrich Drepper <drepper@redhat.com>, 2000. + + This file 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. + + elfutils 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, see <http://www.gnu.org/licenses/>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <errno.h> +#include <fcntl.h> +#include <libelf.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include ELFUTILS_HEADER(ebl) + + +int +main (int argc, char *argv[] __attribute__ ((unused))) +{ + const char *fname = "xxx_update3"; + int fd; + Elf *elf; + Elf32_Ehdr *ehdr; + Elf32_Phdr *phdr; + Elf_Scn *scn; + Elf32_Shdr *shdr; + Elf_Data *data; + struct Ebl_Strtab *shst; + struct Ebl_Strent *shstrtabse; + int i; + + fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666); + if (fd == -1) + { + printf ("cannot open `%s': %s\n", fname, strerror (errno)); + exit (1); + } + + elf_version (EV_CURRENT); + + elf_fill (0x42); + + elf = elf_begin (fd, ELF_C_WRITE, NULL); + if (elf == NULL) + { + printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); + exit (1); + } + + /* Create an ELF header. */ + ehdr = elf32_newehdr (elf); + if (ehdr == NULL) + { + printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); + exit (1); + } + + /* Print the ELF header values. */ + if (argc > 1) + { + for (i = 0; i < EI_NIDENT; ++i) + printf (" %02x", ehdr->e_ident[i]); + printf ("\ +\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" + "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" + "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", + ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, + ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, + ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, + ehdr->e_shnum, ehdr->e_shstrndx); + } + + ehdr->e_ident[0] = 42; + ehdr->e_ident[4] = 1; + ehdr->e_ident[5] = 1; + ehdr->e_ident[6] = 2; + ehdr->e_type = ET_EXEC; + ehdr->e_version = 1; + ehdr->e_ehsize = 1; + elf_flagehdr (elf, ELF_C_SET, ELF_F_DIRTY); + + /* Create the program header. */ + phdr = elf32_newphdr (elf, 1); + if (phdr == NULL) + { + printf ("cannot create program header: %s\n", elf_errmsg (-1)); + exit (1); + } + + phdr[0].p_type = PT_PHDR; + elf_flagphdr (elf, ELF_C_SET, ELF_F_DIRTY); + + shst = ebl_strtabinit (true); + + scn = elf_newscn (elf); + if (scn == NULL) + { + printf ("cannot create SHSTRTAB section: %s\n", elf_errmsg (-1)); + exit (1); + } + shdr = elf32_getshdr (scn); + if (shdr == NULL) + { + printf ("cannot get header for SHSTRTAB section: %s\n", elf_errmsg (-1)); + exit (1); + } + + shstrtabse = ebl_strtabadd (shst, ".shstrtab", 0); + + shdr->sh_type = SHT_STRTAB; + shdr->sh_flags = 0; + shdr->sh_addr = 0; + shdr->sh_link = SHN_UNDEF; + shdr->sh_info = SHN_UNDEF; + shdr->sh_addralign = 1; + shdr->sh_entsize = 0; + + /* We have to store the section index in the ELF header. */ + ehdr->e_shstrndx = elf_ndxscn (scn); + + data = elf_newdata (scn); + if (data == NULL) + { + printf ("cannot create data SHSTRTAB section: %s\n", elf_errmsg (-1)); + exit (1); + } + + /* No more sections, finalize the section header string table. */ + ebl_strtabfinalize (shst, data); + + shdr->sh_name = ebl_strtaboffset (shstrtabse); + + /* Let the library compute the internal structure information. */ + if (elf_update (elf, ELF_C_NULL) < 0) + { + printf ("failure in elf_update(NULL): %s\n", elf_errmsg (-1)); + exit (1); + } + + ehdr = elf32_getehdr (elf); + + phdr[0].p_offset = ehdr->e_phoff; + phdr[0].p_offset = ehdr->e_phoff; + phdr[0].p_vaddr = ehdr->e_phoff; + phdr[0].p_paddr = ehdr->e_phoff; + phdr[0].p_flags = PF_R | PF_X; + phdr[0].p_filesz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT); + phdr[0].p_memsz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT); + phdr[0].p_align = sizeof (Elf32_Word); + + /* Write out the file. */ + if (elf_update (elf, ELF_C_WRITE) < 0) + { + printf ("failure in elf_update(WRITE): %s\n", elf_errmsg (-1)); + exit (1); + } + + /* We don't need the string table anymore. */ + ebl_strtabfree (shst); + + /* And the data allocated in the .shstrtab section. */ + free (data->d_buf); + + /* Print the ELF header values. */ + if (argc > 1) + { + for (i = 0; i < EI_NIDENT; ++i) + printf (" %02x", ehdr->e_ident[i]); + printf ("\ +\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" + "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" + "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", + ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, + ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, + ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, + ehdr->e_shnum, ehdr->e_shstrndx); + } + + if (elf_end (elf) != 0) + { + printf ("failure in elf_end: %s\n", elf_errmsg (-1)); + exit (1); + } + + unlink (fname); + + return 0; +} |