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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <string.h>
#include <dlfcn.h>
#include <stdio.h>
#include <debug.h>
#include "_rtld.h"
#include "_elf.h"
#include "_inline_gen.h"
#include "msg.h"
static Dl_amd64_unwindinfo *
getunwind_core(Lm_list *lml, void *pc, Dl_amd64_unwindinfo *unwindinfo)
{
Rt_map *lmp;
/*
* Validate the version information.
*/
if (unwindinfo == NULL) {
eprintf(lml, ERR_FATAL, MSG_INTL(MSG_ARG_ILLVAL));
return (0);
}
if ((unwindinfo->dlui_version < DLUI_VERS_1) ||
(unwindinfo->dlui_version > DLUI_VERS_CURRENT)) {
eprintf(lml, ERR_FATAL, MSG_INTL(MSG_UNW_BADVERS),
unwindinfo->dlui_version, DLUI_VERS_CURRENT);
return (0);
}
/*
* Clean out the structure.
*/
unwindinfo->dlui_flags = 0;
unwindinfo->dlui_objname = 0;
unwindinfo->dlui_unwindstart = 0;
unwindinfo->dlui_unwindend = 0;
unwindinfo->dlui_segstart = 0;
unwindinfo->dlui_segend = 0;
/*
* Identify the link-map associated with the exception "pc". Note,
* the "pc" might not correspond to a link-map (as can happen with a
* "pc" fabricated by a debugger such as dbx). In this case, the
* unwind data buffer will be filled with flags set to indicate an
* unknown caller.
*/
lmp = _caller(pc, CL_NONE);
if (lmp) {
mmapobj_result_t *mpp;
/*
* Determine the associated segment.
*/
if ((mpp = find_segment(pc, lmp)) == NULL)
return (0);
unwindinfo->dlui_objname = (char *)PATHNAME(lmp);
unwindinfo->dlui_segstart = mpp->mr_addr;
unwindinfo->dlui_segend = mpp->mr_addr + mpp->mr_msize;
if (PTUNWIND(lmp) && (mpp->mr_addr)) {
uintptr_t base;
if (FLAGS(lmp) & FLG_RT_FIXED)
base = 0;
else
base = ADDR(lmp);
unwindinfo->dlui_unwindstart =
(void *)(PTUNWIND(lmp)->p_vaddr + base);
unwindinfo->dlui_unwindend =
(void *)(PTUNWIND(lmp)->p_vaddr +
PTUNWIND(lmp)->p_memsz + base);
} else if (mpp->mr_addr)
unwindinfo->dlui_flags |= DLUI_FLG_NOUNWIND;
else
unwindinfo->dlui_flags |=
DLUI_FLG_NOUNWIND | DLUI_FLG_NOOBJ;
} else {
/*
* No object found.
*/
unwindinfo->dlui_flags = DLUI_FLG_NOOBJ | DLUI_FLG_NOUNWIND;
}
return (unwindinfo);
}
#pragma weak _dlamd64getunwind = dlamd64getunwind
Dl_amd64_unwindinfo *
dlamd64getunwind(void *pc, Dl_amd64_unwindinfo *unwindinfo)
{
Rt_map *lmp;
Lm_list *lml;
int entry = enter(0);
lmp = _caller(caller(), CL_EXECDEF);
lml = LIST(lmp);
unwindinfo = getunwind_core(lml, pc, unwindinfo);
if (entry)
leave(lml, 0);
return (unwindinfo);
}
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