freebsd-dev/contrib/elftoolchain/libdwarf/dwarf_init.c

164 lines
4.1 KiB
C

/*-
* Copyright (c) 2007 John Birrell (jb@freebsd.org)
* Copyright (c) 2009 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "_libdwarf.h"
ELFTC_VCSID("$Id: dwarf_init.c 2073 2011-10-27 03:30:47Z jkoshy $");
int
dwarf_elf_init(Elf *elf, int mode, Dwarf_Handler errhand, Dwarf_Ptr errarg,
Dwarf_Debug *ret_dbg, Dwarf_Error *error)
{
Dwarf_Debug dbg;
int ret;
if (elf == NULL || ret_dbg == NULL) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (mode != DW_DLC_READ) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (_dwarf_alloc(&dbg, mode, error) != DW_DLE_NONE)
return (DW_DLV_ERROR);
if (_dwarf_elf_init(dbg, elf, error) != DW_DLE_NONE) {
free(dbg);
return (DW_DLV_ERROR);
}
if ((ret = _dwarf_init(dbg, 0, errhand, errarg, error)) !=
DW_DLE_NONE) {
_dwarf_elf_deinit(dbg);
free(dbg);
if (ret == DW_DLE_DEBUG_INFO_NULL)
return (DW_DLV_NO_ENTRY);
else
return (DW_DLV_ERROR);
}
*ret_dbg = dbg;
return (DW_DLV_OK);
}
int
dwarf_get_elf(Dwarf_Debug dbg, Elf **elf, Dwarf_Error *error)
{
Dwarf_Elf_Object *e;
if (dbg == NULL || elf == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
e = dbg->dbg_iface->object;
*elf = e->eo_elf;
return (DW_DLV_OK);
}
int
dwarf_init(int fd, int mode, Dwarf_Handler errhand, Dwarf_Ptr errarg,
Dwarf_Debug *ret_dbg, Dwarf_Error *error)
{
Dwarf_Debug dbg;
Elf *elf;
int ret;
if (fd < 0 || ret_dbg == NULL) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (mode != DW_DLC_READ) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (elf_version(EV_CURRENT) == EV_NONE) {
DWARF_SET_ELF_ERROR(NULL, error);
return (DW_DLV_ERROR);
}
if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
DWARF_SET_ELF_ERROR(NULL, error);
return (DW_DLV_ERROR);
}
if (_dwarf_alloc(&dbg, mode, error) != DW_DLE_NONE)
return (DW_DLV_ERROR);
if (_dwarf_elf_init(dbg, elf, error) != DW_DLE_NONE) {
free(dbg);
return (DW_DLV_ERROR);
}
if ((ret = _dwarf_init(dbg, 0, errhand, errarg, error)) !=
DW_DLE_NONE) {
_dwarf_elf_deinit(dbg);
free(dbg);
if (ret == DW_DLE_DEBUG_INFO_NULL)
return (DW_DLV_NO_ENTRY);
else
return (DW_DLV_ERROR);
}
*ret_dbg = dbg;
return (DW_DLV_OK);
}
int
dwarf_object_init(Dwarf_Obj_Access_Interface *iface, Dwarf_Handler errhand,
Dwarf_Ptr errarg, Dwarf_Debug *ret_dbg, Dwarf_Error *error)
{
Dwarf_Debug dbg;
if (iface == NULL || ret_dbg == NULL) {
DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (_dwarf_alloc(&dbg, DW_DLC_READ, error) != DW_DLE_NONE)
return (DW_DLV_ERROR);
dbg->dbg_iface = iface;
if (_dwarf_init(dbg, 0, errhand, errarg, error) != DW_DLE_NONE) {
free(dbg);
return (DW_DLV_ERROR);
}
*ret_dbg = dbg;
return (DW_DLV_OK);
}