mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-25 20:43:42 +01:00
101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2003 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
#include "unwind-internal.h"
|
|
|
|
PROTECTED _Unwind_Reason_Code
|
|
_Unwind_RaiseException (struct _Unwind_Exception *exception_object)
|
|
{
|
|
unsigned long exception_class = exception_object->exception_class;
|
|
_Unwind_Personality_Fn personality;
|
|
struct _Unwind_Context context;
|
|
_Unwind_Reason_Code reason;
|
|
unw_proc_info_t pi;
|
|
unw_context_t uc;
|
|
unw_word_t ip;
|
|
int ret;
|
|
|
|
debug (1, "%s(exception_object=%p)\n", __FUNCTION__, exception_object);
|
|
|
|
if (_Unwind_InitContext (&context, &uc) < 0)
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
|
|
/* Phase 1 (search phase) */
|
|
|
|
while (1)
|
|
{
|
|
if ((ret = unw_step (&context.cursor)) <= 0)
|
|
{
|
|
if (ret == 0)
|
|
{
|
|
debug (1, "%s: no handler found\n", __FUNCTION__);
|
|
return _URC_END_OF_STACK;
|
|
}
|
|
else
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
}
|
|
|
|
if (unw_get_proc_info (&context.cursor, &pi) < 0)
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
|
|
personality = (_Unwind_Personality_Fn) pi.handler;
|
|
if (personality)
|
|
{
|
|
reason = (*personality) (_U_VERSION, _UA_SEARCH_PHASE,
|
|
exception_class, exception_object,
|
|
&context);
|
|
if (reason != _URC_CONTINUE_UNWIND)
|
|
{
|
|
if (reason == _URC_HANDLER_FOUND)
|
|
break;
|
|
else
|
|
{
|
|
debug (1, "%s: personality returned %d\n",
|
|
__FUNCTION__, reason);
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Exceptions are associated with IP-ranges. If a given exception
|
|
is handled at a particular IP, it will _always_ be handled at
|
|
that IP. If this weren't true, we'd have to track the tuple
|
|
(IP,SP,BSP) to uniquely identify the stack frame that's handling
|
|
the exception. */
|
|
if (unw_get_reg (&context.cursor, UNW_REG_IP, &ip) < 0)
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
exception_object->private_1 = 0; /* clear "stop" pointer */
|
|
exception_object->private_2 = ip; /* save frame marker */
|
|
|
|
debug (1, "%s: found handler for IP=%lx; entering cleanup phase\n",
|
|
__FUNCTION__, ip);
|
|
|
|
/* Reset the cursor to the first frame: */
|
|
if (unw_init_local (&context.cursor, &uc) < 0)
|
|
return _URC_FATAL_PHASE1_ERROR;
|
|
|
|
return _Unwind_Phase2 (exception_object, &context);
|
|
}
|