Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libelf/gelf_getphdr.c b/libelf/gelf_getphdr.c
new file mode 100644
index 0000000..c719e4b
--- /dev/null
+++ b/libelf/gelf_getphdr.c
@@ -0,0 +1,135 @@
+/* Return program header table entry.
+ Copyright (C) 1998-2010, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+ This file is free software; you can redistribute it and/or modify
+ it under the terms of either
+
+ * the GNU Lesser General Public License as published by the Free
+ Software Foundation; either version 3 of the License, or (at
+ your option) any later version
+
+ or
+
+ * the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at
+ your option) any later version
+
+ or both in parallel, as here.
+
+ 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 copies of the GNU General Public License and
+ the GNU Lesser General Public License along with this program. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gelf.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "libelfP.h"
+
+
+GElf_Phdr *
+gelf_getphdr (Elf *elf, int ndx, GElf_Phdr *dst)
+{
+ GElf_Phdr *result = NULL;
+
+ if (elf == NULL)
+ return NULL;
+
+ if (unlikely (elf->kind != ELF_K_ELF))
+ {
+ __libelf_seterrno (ELF_E_INVALID_HANDLE);
+ return NULL;
+ }
+
+ if (dst == NULL)
+ {
+ __libelf_seterrno (ELF_E_INVALID_OPERAND);
+ return NULL;
+ }
+
+ rwlock_rdlock (elf->lock);
+
+ if (elf->class == ELFCLASS32)
+ {
+ /* Copy the elements one-by-one. */
+ Elf32_Phdr *phdr = elf->state.elf32.phdr;
+
+ if (phdr == NULL)
+ {
+ rwlock_unlock (elf->lock);
+ phdr = INTUSE(elf32_getphdr) (elf);
+ if (phdr == NULL)
+ /* The error number is already set. */
+ return NULL;
+ rwlock_rdlock (elf->lock);
+ }
+
+ /* Test whether the index is ok. */
+ size_t phnum;
+ if (__elf_getphdrnum_chk_rdlock (elf, &phnum) != 0
+ || (size_t) ndx >= phnum)
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ goto out;
+ }
+
+ /* We know the result now. */
+ result = dst;
+
+ /* Now correct the pointer to point to the correct element. */
+ phdr += ndx;
+
+#define COPY(Name) result->Name = phdr->Name
+ COPY (p_type);
+ COPY (p_offset);
+ COPY (p_vaddr);
+ COPY (p_paddr);
+ COPY (p_filesz);
+ COPY (p_memsz);
+ COPY (p_flags);
+ COPY (p_align);
+ }
+ else
+ {
+ /* Copy the elements one-by-one. */
+ Elf64_Phdr *phdr = elf->state.elf64.phdr;
+
+ if (phdr == NULL)
+ {
+ rwlock_unlock (elf->lock);
+ phdr = INTUSE(elf64_getphdr) (elf);
+ if (phdr == NULL)
+ /* The error number is already set. */
+ return NULL;
+ rwlock_rdlock (elf->lock);
+ }
+
+ /* Test whether the index is ok. */
+ size_t phnum;
+ if (__elf_getphdrnum_chk_rdlock (elf, &phnum) != 0
+ || (size_t) ndx >= phnum)
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ goto out;
+ }
+
+ /* We only have to copy the data. */
+ result = memcpy (dst, phdr + ndx, sizeof (GElf_Phdr));
+ }
+
+ out:
+ rwlock_unlock (elf->lock);
+
+ return result;
+}