/* Supporting functions for C exception handling.
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2009 Free Software Foundation, Inc.
Contributed by Aldy Hernandez <aldy@quesejoda.com>.
Shamelessly stolen from the Java front end.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
#include "tconfig.h"
#include "tsystem.h"
parse_lsda_header (struct _Unwind_Context *context, const unsigned char *p,
lsda_header_info *info)
{
- _Unwind_Word tmp;
+ _uleb128_t tmp;
unsigned char lpstart_encoding;
info->Start = (context ? _Unwind_GetRegionStart (context) : 0);
return p;
}
+#ifdef __ARM_EABI_UNWINDER__
+/* ARM EABI personality routines must also unwind the stack. */
+#define CONTINUE_UNWINDING \
+ do \
+ { \
+ if (__gnu_unwind_frame (ue_header, context) != _URC_OK) \
+ return _URC_FAILURE; \
+ return _URC_CONTINUE_UNWIND; \
+ } \
+ while (0)
+#else
+#define CONTINUE_UNWINDING return _URC_CONTINUE_UNWIND
+#endif
+
#ifdef __USING_SJLJ_EXCEPTIONS__
#define PERSONALITY_FUNCTION __gcc_personality_sj0
#define __builtin_eh_return_data_regno(x) x
#else
#define PERSONALITY_FUNCTION __gcc_personality_v0
#endif
-#define PERSONALITY_FUNCTION __gcc_personality_v0
+#ifdef __ARM_EABI_UNWINDER__
+_Unwind_Reason_Code
+PERSONALITY_FUNCTION (_Unwind_State, struct _Unwind_Exception *,
+ struct _Unwind_Context *);
+
+_Unwind_Reason_Code
+PERSONALITY_FUNCTION (_Unwind_State state,
+ struct _Unwind_Exception * ue_header,
+ struct _Unwind_Context * context)
+#else
_Unwind_Reason_Code
PERSONALITY_FUNCTION (int, _Unwind_Action, _Unwind_Exception_Class,
struct _Unwind_Exception *, struct _Unwind_Context *);
_Unwind_Exception_Class exception_class ATTRIBUTE_UNUSED,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
+#endif
{
lsda_header_info info;
- const unsigned char *language_specific_data, *p, *action_record;
+ const unsigned char *language_specific_data, *p;
_Unwind_Ptr landing_pad, ip;
-
+ int ip_before_insn = 0;
+
+#ifdef __ARM_EABI_UNWINDER__
+ if ((state & _US_ACTION_MASK) != _US_UNWIND_FRAME_STARTING)
+ CONTINUE_UNWINDING;
+
+ /* The dwarf unwinder assumes the context structure holds things like the
+ function and LSDA pointers. The ARM implementation caches these in
+ the exception header (UCB). To avoid rewriting everything we make the
+ virtual IP register point at the UCB. */
+ ip = (_Unwind_Ptr) ue_header;
+ _Unwind_SetGR (context, 12, ip);
+#else
if (version != 1)
return _URC_FATAL_PHASE1_ERROR;
/* Currently we only support cleanups for C. */
if ((actions & _UA_CLEANUP_PHASE) == 0)
- return _URC_CONTINUE_UNWIND;
+ CONTINUE_UNWINDING;
+#endif
language_specific_data = (const unsigned char *)
_Unwind_GetLanguageSpecificData (context);
/* If no LSDA, then there are no handlers or cleanups. */
if (! language_specific_data)
- return _URC_CONTINUE_UNWIND;
+ CONTINUE_UNWINDING;
/* Parse the LSDA header. */
p = parse_lsda_header (context, language_specific_data, &info);
- ip = _Unwind_GetIP (context) - 1;
+#ifdef HAVE_GETIPINFO
+ ip = _Unwind_GetIPInfo (context, &ip_before_insn);
+#else
+ ip = _Unwind_GetIP (context);
+#endif
+ if (! ip_before_insn)
+ --ip;
landing_pad = 0;
#ifdef __USING_SJLJ_EXCEPTIONS__
return _URC_CONTINUE_UNWIND;
else
{
- _Unwind_Word cs_lp, cs_action;
+ _uleb128_t cs_lp, cs_action;
do
{
p = read_uleb128 (p, &cs_lp);
/* Can never have null landing pad for sjlj -- that would have
been indicated by a -1 call site index. */
- landing_pad = cs_lp + 1;
- if (cs_action)
- action_record = info.action_table + cs_action - 1;
+ landing_pad = (_Unwind_Ptr)cs_lp + 1;
goto found_something;
}
#else
while (p < info.action_table)
{
_Unwind_Ptr cs_start, cs_len, cs_lp;
- _Unwind_Word cs_action;
+ _uleb128_t cs_action;
/* Note that all call-site encodings are "absolute" displacements. */
p = read_encoded_value (0, info.call_site_encoding, p, &cs_start);
{
if (cs_lp)
landing_pad = info.LPStart + cs_lp;
- if (cs_action)
- action_record = info.action_table + cs_action - 1;
goto found_something;
}
}
-
#endif
/* IP is not in table. No associated cleanups. */
/* ??? This is where C++ calls std::terminate to catch throw
from a destructor. */
- return _URC_CONTINUE_UNWIND;
+ CONTINUE_UNWINDING;
found_something:
if (landing_pad == 0)
{
/* IP is present, but has a null landing pad.
No handler to be run. */
- return _URC_CONTINUE_UNWIND;
+ CONTINUE_UNWINDING;
}
_Unwind_SetGR (context, __builtin_eh_return_data_regno (0),
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