-/* DWARF2 exception handling and frame unwind runtime interface routines.
- Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+/* SJLJ exception handling and frame unwind runtime interface routines.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006
+ Free Software Foundation, Inc.
This file is part of GCC.
the Free Software Foundation; either version 2, or (at your option)
any later version.
+ In addition to the permissions in the GNU General Public License, the
+ Free Software Foundation gives you unlimited permission to link the
+ compiled version of this file into combinations with other programs,
+ and to distribute those combinations without any restriction coming
+ from the use of this file. (The General Public License restrictions
+ do apply in other respects; for example, they cover modification of
+ the file, and distribution when not linked into a combined
+ executable.)
+
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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. */
+ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#include "tconfig.h"
#include "tsystem.h"
+#include "coretypes.h"
+#include "tm.h"
#include "unwind.h"
#include "gthr.h"
-#if USING_SJLJ_EXCEPTIONS
+#ifdef __USING_SJLJ_EXCEPTIONS__
#ifdef DONT_USE_BUILTIN_SETJMP
+#ifndef inhibit_libc
#include <setjmp.h>
#else
-#define setjmp __builtin_setjmp
+typedef void *jmp_buf[JMP_BUF_SIZE];
+extern void longjmp(jmp_buf, int) __attribute__((noreturn));
+#endif
+#else
#define longjmp __builtin_longjmp
#endif
+/* The setjmp side is dealt with in the except.c file. */
+#undef setjmp
+#define setjmp setjmp_should_not_be_used_in_this_file
+
+
/* This structure is allocated on the stack of the target function.
This must match the definition created in except.c:init_eh. */
struct SjLj_Function_Context
#ifdef DONT_USE_BUILTIN_SETJMP
/* We don't know what sort of alignment requirements the system
jmp_buf has. We over estimated in except.c, and now we have
- to match that here just in case the system *didn't* have more
+ to match that here just in case the system *didn't* have more
restrictive requirements. */
jmp_buf jbuf __attribute__((aligned));
#else
struct SjLj_Function_Context *fc;
};
-typedef struct
+typedef struct
{
_Unwind_Personality_Fn personality;
} _Unwind_FrameState;
static int use_fc_key = -1;
static void
-fc_key_dtor (void *ptr)
-{
- __gthread_key_dtor (fc_key, ptr);
-}
-
-static void
fc_key_init (void)
{
- use_fc_key = __gthread_key_create (&fc_key, fc_key_dtor) == 0;
+ use_fc_key = __gthread_key_create (&fc_key, 0) == 0;
}
static void
return context->fc->data[index];
}
+/* Get the value of the CFA as saved in CONTEXT. */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context __attribute__((unused)))
+{
+ /* ??? Ideally __builtin_setjmp places the CFA in the jmpbuf. */
+
+#ifndef DONT_USE_BUILTIN_SETJMP
+ /* This is a crude imitation of the CFA: the saved stack pointer.
+ This is roughly the CFA of the frame before CONTEXT. When using the
+ DWARF-2 unwinder _Unwind_GetCFA returns the CFA of the frame described
+ by CONTEXT instead; but for DWARF-2 the cleanups associated with
+ CONTEXT have already been run, and for SJLJ they have not yet been. */
+ if (context->fc != NULL)
+ return (_Unwind_Word) context->fc->jbuf[2];
+#endif
+
+ /* Otherwise we're out of luck for now. */
+ return (_Unwind_Word) 0;
+}
+
void
_Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val)
{
return context->fc->call_site + 1;
}
+_Unwind_Ptr
+_Unwind_GetIPInfo (struct _Unwind_Context *context, int *ip_before_insn)
+{
+ *ip_before_insn = 0;
+ if (context->fc != NULL)
+ return context->fc->call_site + 1;
+ else
+ return 0;
+}
+
/* Set the return landing pad index in CONTEXT. */
void
}
_Unwind_Ptr
-_Unwind_GetRegionStart (struct _Unwind_Context *context)
+_Unwind_GetRegionStart (struct _Unwind_Context *context __attribute__((unused)) )
{
return 0;
}
+void *
+_Unwind_FindEnclosingFunction (void *pc __attribute__((unused)))
+{
+ return NULL;
+}
+
#ifndef __ia64__
_Unwind_Ptr
-_Unwind_GetDataRelBase (struct _Unwind_Context *context)
+_Unwind_GetDataRelBase (struct _Unwind_Context *context __attribute__((unused)) )
{
return 0;
}
_Unwind_Ptr
-_Unwind_GetTextRelBase (struct _Unwind_Context *context)
+_Unwind_GetTextRelBase (struct _Unwind_Context *context __attribute__((unused)) )
{
return 0;
}
context->fc = context->fc->prev;
}
-static inline void
+static void
+uw_advance_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
+{
+ _Unwind_SjLj_Unregister (context->fc);
+ uw_update_context (context, fs);
+}
+
+static inline void
uw_init_context (struct _Unwind_Context *context)
{
context->fc = _Unwind_SjLj_GetContext ();
}
-/* ??? There appear to be bugs in integrate.c wrt __builtin_longjmp and
- virtual-stack-vars. An inline version of this segfaults on Sparc. */
-#define uw_install_context(CURRENT, TARGET) \
- do { \
- _Unwind_SjLj_SetContext ((TARGET)->fc); \
- longjmp ((TARGET)->fc->jbuf, 1); \
- } while (0)
-
+static void __attribute__((noreturn))
+uw_install_context (struct _Unwind_Context *current __attribute__((unused)),
+ struct _Unwind_Context *target)
+{
+ _Unwind_SjLj_SetContext (target->fc);
+ longjmp (target->fc->jbuf, 1);
+}
static inline _Unwind_Ptr
uw_identify_context (struct _Unwind_Context *context)
#define _Unwind_RaiseException _Unwind_SjLj_RaiseException
#define _Unwind_ForcedUnwind _Unwind_SjLj_ForcedUnwind
#define _Unwind_Resume _Unwind_SjLj_Resume
+#define _Unwind_Resume_or_Rethrow _Unwind_SjLj_Resume_or_Rethrow
#include "unwind.inc"
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