freebsd-skq/contrib/elftoolchain/libdwarf/dwarf_cu.c
emaste 46be049bf4 Update elftoolchain to upstream rev 3130
This brings a number of fixes to elfcopy/strip and DWARF4 improvements.

Sponsored by:	The FreeBSD Foundation
2014-12-24 03:13:16 +00:00

162 lines
4.7 KiB
C

/*-
* Copyright (c) 2007 John Birrell (jb@freebsd.org)
* Copyright (c) 2014 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_cu.c 3041 2014-05-18 15:11:03Z kaiwang27 $");
int
dwarf_next_cu_header_c(Dwarf_Debug dbg, Dwarf_Bool is_info,
Dwarf_Unsigned *cu_length, Dwarf_Half *cu_version,
Dwarf_Off *cu_abbrev_offset, Dwarf_Half *cu_pointer_size,
Dwarf_Half *cu_offset_size, Dwarf_Half *cu_extension_size,
Dwarf_Sig8 *type_signature, Dwarf_Unsigned *type_offset,
Dwarf_Unsigned *cu_next_offset, Dwarf_Error *error)
{
Dwarf_CU cu;
int ret;
if (dbg == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (is_info) {
if (dbg->dbg_cu_current == NULL)
ret = _dwarf_info_first_cu(dbg, error);
else
ret = _dwarf_info_next_cu(dbg, error);
} else {
if (dbg->dbg_tu_current == NULL)
ret = _dwarf_info_first_tu(dbg, error);
else
ret = _dwarf_info_next_tu(dbg, error);
}
if (ret == DW_DLE_NO_ENTRY) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
} else if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
if (is_info) {
if (dbg->dbg_cu_current == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
cu = dbg->dbg_cu_current;
} else {
if (dbg->dbg_tu_current == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
cu = dbg->dbg_tu_current;
}
if (cu_length)
*cu_length = cu->cu_length;
if (cu_version)
*cu_version = cu->cu_version;
if (cu_abbrev_offset)
*cu_abbrev_offset = (Dwarf_Off) cu->cu_abbrev_offset;
if (cu_pointer_size)
*cu_pointer_size = cu->cu_pointer_size;
if (cu_offset_size) {
if (cu->cu_length_size == 4)
*cu_offset_size = 4;
else
*cu_offset_size = 8;
}
if (cu_extension_size) {
if (cu->cu_length_size == 4)
*cu_extension_size = 0;
else
*cu_extension_size = 4;
}
if (cu_next_offset)
*cu_next_offset = cu->cu_next_offset;
if (!is_info) {
if (type_signature)
*type_signature = cu->cu_type_sig;
if (type_offset)
*type_offset = cu->cu_type_offset;
}
return (DW_DLV_OK);
}
int
dwarf_next_cu_header_b(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
Dwarf_Half *cu_pointer_size, Dwarf_Half *cu_offset_size,
Dwarf_Half *cu_extension_size, Dwarf_Unsigned *cu_next_offset,
Dwarf_Error *error)
{
return (dwarf_next_cu_header_c(dbg, 1, cu_length, cu_version,
cu_abbrev_offset, cu_pointer_size, cu_offset_size,
cu_extension_size, NULL, NULL, cu_next_offset, error));
}
int
dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset,
Dwarf_Error *error)
{
return (dwarf_next_cu_header_b(dbg, cu_length, cu_version,
cu_abbrev_offset, cu_pointer_size, NULL, NULL, cu_next_offset,
error));
}
int
dwarf_next_types_section(Dwarf_Debug dbg, Dwarf_Error *error)
{
/* Free resource allocated for current .debug_types section. */
_dwarf_type_unit_cleanup(dbg);
dbg->dbg_types_loaded = 0;
dbg->dbg_types_off = 0;
/* Reset type unit pointer. */
dbg->dbg_tu_current = NULL;
/* Search for the next .debug_types section. */
dbg->dbg_types_sec = _dwarf_find_next_types_section(dbg,
dbg->dbg_types_sec);
if (dbg->dbg_types_sec == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
return (DW_DLV_OK);
}