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-rw-r--r--src/tests/alldts.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/src/tests/alldts.c b/src/tests/alldts.c
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+/* Create an ELF file with all the DT_* flags set.
+ Copyright (C) 2011 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Marek Polacek <mpolacek@redhat.com>, 2011.
+
+ 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 ELFUTILS_HEADER(ebl)
+#include <elf.h>
+#include <gelf.h>
+#include <fcntl.h>
+#include <libelf.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+int
+main (void)
+{
+ static const char fname[] = "testfile-alldts";
+ struct Ebl_Strtab *shst;
+ struct Ebl_Strent *dynscn;
+ struct Ebl_Strent *shstrtabse;
+ const Elf32_Sword dtflags[] =
+ {
+ DT_NULL, DT_NEEDED, DT_PLTRELSZ, DT_PLTGOT,
+ DT_HASH, DT_STRTAB, DT_SYMTAB, DT_RELA,
+ DT_RELASZ, DT_RELAENT, DT_STRSZ, DT_SYMENT,
+ DT_INIT, DT_FINI, DT_SONAME, DT_RPATH,
+ DT_SYMBOLIC, DT_REL, DT_RELSZ, DT_RELENT,
+ DT_PLTREL, DT_DEBUG, DT_TEXTREL, DT_JMPREL,
+ DT_BIND_NOW, DT_INIT_ARRAY, DT_FINI_ARRAY,
+ DT_INIT_ARRAYSZ, DT_FINI_ARRAYSZ, DT_RUNPATH,
+ DT_FLAGS, DT_ENCODING, DT_PREINIT_ARRAY,
+ DT_PREINIT_ARRAYSZ, DT_VERSYM, DT_GNU_PRELINKED,
+ DT_GNU_CONFLICTSZ, DT_GNU_LIBLISTSZ, DT_CHECKSUM,
+ DT_PLTPADSZ, DT_MOVEENT, DT_MOVESZ, DT_FEATURE_1,
+ DT_POSFLAG_1, DT_SYMINSZ, DT_SYMINENT, DT_GNU_HASH,
+ DT_TLSDESC_PLT, DT_TLSDESC_GOT, DT_GNU_CONFLICT,
+ DT_GNU_LIBLIST, DT_CONFIG, DT_DEPAUDIT, DT_AUDIT,
+ DT_PLTPAD, DT_MOVETAB, DT_SYMINFO, DT_RELACOUNT,
+ DT_RELCOUNT, DT_FLAGS_1, DT_VERDEF, DT_VERDEFNUM,
+ DT_VERNEED, DT_VERNEEDNUM, DT_AUXILIARY, DT_FILTER
+ };
+ const int ndtflags = sizeof (dtflags) / sizeof (dtflags[0]);
+
+ /* We use no threads here which can interfere with handling a stream. */
+ (void) __fsetlocking (stdout, FSETLOCKING_BYCALLER);
+
+ /* Open the file. */
+ int fd = open64 (fname, O_RDWR | O_CREAT | O_TRUNC, 0666);
+ if (fd == -1)
+ {
+ printf ("cannot open `%s': %m\n", fname);
+ return 1;
+ }
+
+ /* Tell the library which version are we expecting. */
+ elf_version (EV_CURRENT);
+
+ /* Create an ELF descriptor. */
+ Elf *elf = elf_begin (fd, ELF_C_WRITE, NULL);
+ if (elf == NULL)
+ {
+ printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ /* Create an ELF header. */
+ Elf32_Ehdr *ehdr = elf32_newehdr (elf);
+ if (ehdr == NULL)
+ {
+ printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ ehdr->e_ident[0] = 42;
+ ehdr->e_ident[5] = 1;
+ ehdr->e_ident[6] = 2;
+ ehdr->e_type = ET_EXEC;
+ ehdr->e_machine = EM_386;
+ ehdr->e_version = 1;
+ ehdr->e_ehsize = 1;
+ ehdr->e_shnum = 3;
+
+ elf_flagehdr (elf, ELF_C_SET, ELF_F_DIRTY);
+
+ /* Create the program headers. */
+ Elf32_Phdr *phdr = elf32_newphdr (elf, 2);
+ if (phdr == NULL)
+ {
+ printf ("cannot create program headers: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ phdr[0].p_type = PT_PHDR;
+ phdr[1].p_type = PT_DYNAMIC;
+
+ elf_flagphdr (elf, ELF_C_SET, ELF_F_DIRTY);
+ shst = ebl_strtabinit (true);
+
+ /* Create the .dynamic section. */
+ Elf_Scn *scn = elf_newscn (elf);
+ if (scn == NULL)
+ {
+ printf ("cannot create DYNAMIC section: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ Elf32_Shdr *shdr = elf32_getshdr (scn);
+ if (shdr == NULL)
+ {
+ printf ("cannot get header for DYNAMIC section: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ dynscn = ebl_strtabadd (shst, ".dynamic", 0);
+
+ /* We'll need to know the section offset. But this will be set up
+ by elf_update later, so for now just store the address. */
+ const Elf32_Off *const dynscn_offset = &shdr->sh_offset;
+ shdr->sh_type = SHT_DYNAMIC;
+ shdr->sh_flags = SHF_ALLOC | SHF_WRITE;
+ shdr->sh_link = SHN_UNDEF;
+ shdr->sh_info = SHN_UNDEF;
+ /* This section will start here. */
+ shdr->sh_addr = 0x1a0;
+
+ /* Create new section data. */
+ Elf_Data *data = elf_newdata (scn);
+ if (data == NULL)
+ {
+ printf ("cannot create data for DYNAMIC section: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ /* Allocate memory for all the .dynamic entries. */
+ Elf32_Dyn *dyn = malloc (ndtflags * sizeof (Elf32_Dyn));
+ if (dyn == NULL)
+ {
+ printf ("malloc failed: %m\n");
+ return 1;
+ }
+
+ /* Now write all the DT_* flags. */
+ for (int i = 0; i < ndtflags; ++i)
+ {
+ dyn[i].d_tag = dtflags[i];
+ dyn[i].d_un.d_val = 0xdeadbeef;
+ }
+
+ /* Set the pointer to allocated memory. */
+ data->d_buf = dyn;
+ data->d_type = ELF_T_DYN;
+ data->d_version = EV_CURRENT;
+ data->d_size = ndtflags * sizeof (Elf32_Dyn);
+ data->d_align = 0x8;
+
+ /* Create .shstrtab section. */
+ scn = elf_newscn (elf);
+ if (scn == NULL)
+ {
+ printf ("cannot create SHSTRTAB section: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ shdr = elf32_getshdr (scn);
+ if (shdr == NULL)
+ {
+ printf ("cannot get header for SHSTRTAB section: %s\n", elf_errmsg (-1));
+ return 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_entsize = 1;
+
+ /* 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));
+ return 1;
+ }
+
+ /* No more sections, finalize the section header string table. */
+ ebl_strtabfinalize (shst, data);
+
+ elf32_getshdr (elf_getscn (elf, 1))->sh_name = ebl_strtaboffset (dynscn);
+ 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));
+ return 1;
+ }
+
+ ehdr = elf32_getehdr (elf);
+
+ 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);
+
+ phdr[1].p_flags = PF_W | PF_R;
+ phdr[1].p_offset = *dynscn_offset;
+ /* Set up the start of this segment to equal start address of the
+ .dynamic section. */
+ phdr[1].p_vaddr = 0x1a0;
+ phdr[1].p_paddr = 0x1a0;
+ phdr[1].p_align = 2 * sizeof (Elf32_Word);
+ phdr[1].p_filesz = ndtflags * sizeof (Elf32_Dyn);
+ phdr[1].p_memsz = ndtflags * sizeof (Elf32_Dyn);
+
+ /* Write out the file. */
+ if (elf_update (elf, ELF_C_WRITE) < 0)
+ {
+ printf ("failure in elf_update(WRITE): %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ /* We don't need the string table anymore. */
+ ebl_strtabfree (shst);
+
+ /* And the data allocated in the .shstrtab section. */
+ free (data->d_buf);
+
+ /* All done. */
+ if (elf_end (elf) != 0)
+ {
+ printf ("failure in elf_end: %s\n", elf_errmsg (-1));
+ return 1;
+ }
+
+ return 0;
+}
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