| Current Path : /usr/src/lib/libdwarf/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/lib/libdwarf/dwarf_attrval.c |
/*-
* Copyright (c) 2007 John Birrell (jb@freebsd.org)
* 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.
*
* $FreeBSD: release/9.1.0/lib/libdwarf/dwarf_attrval.c 179187 2008-05-22 02:14:23Z jb $
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "_libdwarf.h"
Dwarf_AttrValue
dwarf_attrval_find(Dwarf_Die die, Dwarf_Half attr)
{
Dwarf_AttrValue av;
STAILQ_FOREACH(av, &die->die_attrval, av_next) {
if (av->av_attrib == attr)
break;
}
return av;
}
int
dwarf_attrval_add(Dwarf_Die die, Dwarf_AttrValue avref, Dwarf_AttrValue *avp, Dwarf_Error *error)
{
Dwarf_AttrValue av;
int ret = DWARF_E_NONE;
if ((av = malloc(sizeof(struct _Dwarf_AttrValue))) == NULL) {
DWARF_SET_ERROR(error, DWARF_E_MEMORY);
return DWARF_E_MEMORY;
}
memcpy(av, avref, sizeof(struct _Dwarf_AttrValue));
/* Add the attribute value to the list in the die. */
STAILQ_INSERT_TAIL(&die->die_attrval, av, av_next);
/* Save a pointer to the attribute name if this is one. */
if (av->av_attrib == DW_AT_name)
switch (av->av_form) {
case DW_FORM_strp:
die->die_name = av->u[1].s;
break;
case DW_FORM_string:
die->die_name = av->u[0].s;
break;
default:
break;
}
if (avp != NULL)
*avp = av;
return ret;
}
int
dwarf_attrval_flag(Dwarf_Die die, uint64_t attr, Dwarf_Bool *valp, Dwarf_Error *err)
{
Dwarf_AttrValue av;
int ret = DWARF_E_NONE;
if (err == NULL)
return DWARF_E_ERROR;
if (die == NULL || valp == NULL) {
DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
return DWARF_E_ARGUMENT;
}
*valp = 0;
if ((av = dwarf_attrval_find(die, attr)) == NULL) {
DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
ret = DWARF_E_NO_ENTRY;
} else {
switch (av->av_form) {
case DW_FORM_flag:
*valp = (Dwarf_Bool) av->u[0].u64;
break;
default:
printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
__func__,__LINE__,get_form_desc(av->av_form),
(u_long) av->av_form);
DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
ret = DWARF_E_BAD_FORM;
}
}
return ret;
}
int
dwarf_attrval_string(Dwarf_Die die, uint64_t attr, const char **strp, Dwarf_Error *err)
{
Dwarf_AttrValue av;
int ret = DWARF_E_NONE;
if (err == NULL)
return DWARF_E_ERROR;
if (die == NULL || strp == NULL) {
DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
return DWARF_E_ARGUMENT;
}
*strp = NULL;
if (attr == DW_AT_name)
*strp = die->die_name;
else if ((av = dwarf_attrval_find(die, attr)) == NULL) {
DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
ret = DWARF_E_NO_ENTRY;
} else {
switch (av->av_form) {
case DW_FORM_strp:
*strp = av->u[1].s;
break;
case DW_FORM_string:
*strp = av->u[0].s;
break;
default:
printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
__func__,__LINE__,get_form_desc(av->av_form),
(u_long) av->av_form);
DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
ret = DWARF_E_BAD_FORM;
}
}
return ret;
}
int
dwarf_attrval_signed(Dwarf_Die die, uint64_t attr, Dwarf_Signed *valp, Dwarf_Error *err)
{
Dwarf_AttrValue av;
int ret = DWARF_E_NONE;
if (err == NULL)
return DWARF_E_ERROR;
if (die == NULL || valp == NULL) {
DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
return DWARF_E_ARGUMENT;
}
*valp = 0;
if ((av = dwarf_attrval_find(die, attr)) == NULL) {
DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
ret = DWARF_E_NO_ENTRY;
} else {
switch (av->av_form) {
case DW_FORM_data1:
case DW_FORM_sdata:
*valp = av->u[0].s64;
break;
default:
printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
__func__,__LINE__,get_form_desc(av->av_form),
(u_long) av->av_form);
DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
ret = DWARF_E_BAD_FORM;
}
}
return ret;
}
int
dwarf_attrval_unsigned(Dwarf_Die die, uint64_t attr, Dwarf_Unsigned *valp, Dwarf_Error *err)
{
Dwarf_AttrValue av;
int ret = DWARF_E_NONE;
if (err == NULL)
return DWARF_E_ERROR;
if (die == NULL || valp == NULL) {
DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
return DWARF_E_ARGUMENT;
}
*valp = 0;
if ((av = dwarf_attrval_find(die, attr)) == NULL && attr != DW_AT_type) {
DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
ret = DWARF_E_NO_ENTRY;
} else if (av == NULL && (av = dwarf_attrval_find(die,
DW_AT_abstract_origin)) != NULL) {
Dwarf_Die die1;
Dwarf_Unsigned val;
switch (av->av_form) {
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
val = av->u[0].u64;
if ((die1 = dwarf_die_find(die, val)) == NULL ||
(av = dwarf_attrval_find(die1, attr)) == NULL) {
DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
ret = DWARF_E_NO_ENTRY;
}
break;
default:
printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
__func__,__LINE__,get_form_desc(av->av_form),
(u_long) av->av_form);
DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
ret = DWARF_E_BAD_FORM;
}
}
if (ret == DWARF_E_NONE) {
switch (av->av_form) {
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
*valp = av->u[0].u64;
break;
default:
printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
__func__,__LINE__,get_form_desc(av->av_form),
(u_long) av->av_form);
DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
ret = DWARF_E_BAD_FORM;
}
}
return ret;
}