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authorIgor Pashev <pashev.igor@gmail.com>2012-09-04 18:09:07 +0400
committerIgor Pashev <pashev.igor@gmail.com>2012-09-04 18:09:07 +0400
commitea8b1f90d46279d7814a0c7f6b6742d3fab034f7 (patch)
treed626f0ab0d0016423d9ac76473ec928c231b91a5 /lib/32.newphdr.c
downloadlibelf-upstream.tar.gz
Imported Upstream version 0.8.13upstream
Diffstat (limited to 'lib/32.newphdr.c')
-rw-r--r--lib/32.newphdr.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/lib/32.newphdr.c b/lib/32.newphdr.c
new file mode 100644
index 0000000..91c63df
--- /dev/null
+++ b/lib/32.newphdr.c
@@ -0,0 +1,118 @@
+/*
+ * 32.newphdr.c - implementation of the elf{32,64}_newphdr(3) functions.
+ * Copyright (C) 1995 - 2006 Michael Riepe
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <private.h>
+
+#ifndef lint
+static const char rcsid[] = "@(#) $Id: 32.newphdr.c,v 1.16 2008/05/23 08:15:34 michael Exp $";
+#endif /* lint */
+
+static char*
+_elf_newphdr(Elf *elf, size_t count, unsigned cls) {
+ size_t extcount = 0;
+ Elf_Scn *scn = NULL;
+ char *phdr = NULL;
+ size_t size;
+
+ if (!elf) {
+ return NULL;
+ }
+ elf_assert(elf->e_magic == ELF_MAGIC);
+ if (!elf->e_ehdr && !elf->e_readable) {
+ seterr(ERROR_NOEHDR);
+ }
+ else if (elf->e_kind != ELF_K_ELF) {
+ seterr(ERROR_NOTELF);
+ }
+ else if (elf->e_class != cls) {
+ seterr(ERROR_CLASSMISMATCH);
+ }
+ else if (elf->e_ehdr || _elf_cook(elf)) {
+ size = _msize(cls, _elf_version, ELF_T_PHDR);
+ elf_assert(size);
+ if (!(scn = _elf_first_scn(elf))) {
+ return NULL;
+ }
+ if (count) {
+ if (!(phdr = (char*)malloc(count * size))) {
+ seterr(ERROR_MEM_PHDR);
+ return NULL;
+ }
+ memset(phdr, 0, count * size);
+ }
+ elf_assert(elf->e_ehdr);
+ elf->e_phnum = count;
+ if (count >= PN_XNUM) {
+ /*
+ * get NULL section (create it if necessary)
+ */
+ extcount = count;
+ count = PN_XNUM;
+ }
+ if (cls == ELFCLASS32) {
+ ((Elf32_Ehdr*)elf->e_ehdr)->e_phnum = count;
+ scn->s_shdr32.sh_info = extcount;
+ }
+#if __LIBELF64
+ else if (cls == ELFCLASS64) {
+ ((Elf64_Ehdr*)elf->e_ehdr)->e_phnum = count;
+ scn->s_shdr64.sh_info = extcount;
+ }
+#endif /* __LIBELF64 */
+ else {
+ seterr(ERROR_UNIMPLEMENTED);
+ if (phdr) {
+ free(phdr);
+ }
+ return NULL;
+ }
+ if (elf->e_phdr) {
+ free(elf->e_phdr);
+ }
+ elf->e_phdr = phdr;
+ elf->e_phdr_flags |= ELF_F_DIRTY;
+ elf->e_ehdr_flags |= ELF_F_DIRTY;
+ scn->s_scn_flags |= ELF_F_DIRTY;
+ return phdr;
+ }
+ return NULL;
+}
+
+Elf32_Phdr*
+elf32_newphdr(Elf *elf, size_t count) {
+ return (Elf32_Phdr*)_elf_newphdr(elf, count, ELFCLASS32);
+}
+
+#if __LIBELF64
+
+Elf64_Phdr*
+elf64_newphdr(Elf *elf, size_t count) {
+ return (Elf64_Phdr*)_elf_newphdr(elf, count, ELFCLASS64);
+}
+
+unsigned long
+gelf_newphdr(Elf *elf, size_t phnum) {
+ if (!valid_class(elf->e_class)) {
+ seterr(ERROR_UNKNOWN_CLASS);
+ return 0;
+ }
+ return (unsigned long)_elf_newphdr(elf, phnum, elf->e_class);
+}
+
+#endif /* __LIBELF64 */