You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
2.6 KiB
100 lines
2.6 KiB
/* Create descriptor from file descriptor for processing file.
|
|
Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
|
|
This file is part of elfutils.
|
|
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <errno.h>
|
|
#include <stddef.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <libdwP.h>
|
|
|
|
|
|
Dwarf *
|
|
dwarf_begin (int fd, Dwarf_Cmd cmd)
|
|
{
|
|
Elf *elf;
|
|
Elf_Cmd elfcmd;
|
|
Dwarf *result = NULL;
|
|
|
|
switch (cmd)
|
|
{
|
|
case DWARF_C_READ:
|
|
elfcmd = ELF_C_READ_MMAP;
|
|
break;
|
|
case DWARF_C_WRITE:
|
|
elfcmd = ELF_C_WRITE;
|
|
break;
|
|
case DWARF_C_RDWR:
|
|
elfcmd = ELF_C_RDWR;
|
|
break;
|
|
default:
|
|
/* No valid mode. */
|
|
__libdw_seterrno (DWARF_E_INVALID_CMD);
|
|
return NULL;
|
|
}
|
|
|
|
/* We have to call `elf_version' here since the user might have not
|
|
done it or initialized libelf with a different version. This
|
|
would break libdwarf since we are using the ELF data structures
|
|
in a certain way. */
|
|
elf_version (EV_CURRENT);
|
|
|
|
/* Get an ELF descriptor. */
|
|
elf = elf_begin (fd, elfcmd, NULL);
|
|
if (elf == NULL)
|
|
{
|
|
/* Test why the `elf_begin" call failed. */
|
|
struct stat st;
|
|
|
|
if (fstat (fd, &st) == 0 && ! S_ISREG (st.st_mode))
|
|
__libdw_seterrno (DWARF_E_NO_REGFILE);
|
|
else if (errno == EBADF)
|
|
__libdw_seterrno (DWARF_E_INVALID_FILE);
|
|
else
|
|
__libdw_seterrno (DWARF_E_IO_ERROR);
|
|
}
|
|
else
|
|
{
|
|
/* Do the real work now that we have an ELF descriptor. */
|
|
result = INTUSE(dwarf_begin_elf) (elf, cmd, NULL);
|
|
|
|
/* If this failed, free the resources. */
|
|
if (result == NULL)
|
|
elf_end (elf);
|
|
else
|
|
result->free_elf = true;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
INTDEF(dwarf_begin)
|