Adjust for monotone.

1 files changed, 120 insertions, 0 deletions

diff --git a/libelf/gelf_update_phdr.c b/libelf/gelf_update_phdr.c
new file mode 100644
index 00000000..ddd4e1ee
--- /dev/null
+++ b/libelf/gelf_update_phdr.c
@@ -0,0 +1,120 @@
+/* Update program header program header table entry.
+   Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+   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, version 2.
+
+   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <gelf.h>
+#include <string.h>
+
+#include "libelfP.h"
+
+
+int
+gelf_update_phdr (Elf *elf, int ndx, GElf_Phdr *src)
+{
+  int result = 0;
+
+  if (elf == NULL)
+    return 0;
+
+  if (unlikely (elf->kind != ELF_K_ELF))
+    {
+      __libelf_seterrno (ELF_E_INVALID_HANDLE);
+      return 0;
+    }
+
+  rwlock_wrlock (elf->lock);
+
+  if (elf->class == ELFCLASS32)
+    {
+      Elf32_Phdr *phdr = elf->state.elf32.phdr;
+
+      /* We have to convert the data to the 32 bit format.  This might
+	 overflow some fields so we have to test for this case before
+	 copying.  */
+      if (unlikely (src->p_offset > 0xffffffffull)
+	  || unlikely (src->p_vaddr > 0xffffffffull)
+	  || unlikely (src->p_paddr > 0xffffffffull)
+	  || unlikely (src->p_filesz > 0xffffffffull)
+	  || unlikely (src->p_memsz > 0xffffffffull)
+	  || unlikely (src->p_align > 0xffffffffull))
+	{
+	  __libelf_seterrno (ELF_E_INVALID_DATA);
+	  goto out;
+	}
+
+      if (phdr == NULL)
+	{
+	  phdr = INTUSE(elf32_getphdr) (elf);
+	  if (phdr == NULL)
+	    /* The error number is already set.  */
+	    goto out;
+	}
+
+      /* Test whether the index is ok.  */
+      if (unlikely (ndx >= elf->state.elf32.ehdr->e_phnum))
+	{
+	  __libelf_seterrno (ELF_E_INVALID_INDEX);
+	  goto out;
+	}
+
+      /* Now correct the pointer to point to the correct element.  */
+      phdr += ndx;
+
+#define COPY(name) \
+      phdr->name = src->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
+    {
+      Elf64_Phdr *phdr = elf->state.elf64.phdr;
+
+      if (phdr == NULL)
+	{
+	  phdr = INTUSE(elf64_getphdr) (elf);
+	  if (phdr == NULL)
+	    /* The error number is already set.  */
+	    goto out;
+	}
+
+      /* Test whether the index is ok.  */
+      if (unlikely (ndx >= elf->state.elf64.ehdr->e_phnum))
+	{
+	  __libelf_seterrno (ELF_E_INVALID_INDEX);
+	  goto out;
+	}
+
+      /* Just copy the data.  */
+      memcpy (phdr + ndx, src, sizeof (Elf64_Phdr));
+    }
+
+  result = 1;
+
+ out:
+  rwlock_unlock (elf->lock);
+
+  return result;
+}