-/* DWARF2 exception handling and frame unwind runtime interface routines.
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
+/* SJLJ exception handling and frame unwind runtime interface routines.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006,
+ 2009 Free Software Foundation, Inc.
This file is part of GCC.
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)
+ the Free 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
or 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"
+#include "coretypes.h"
+#include "tm.h"
#include "unwind.h"
#include "gthr.h"
extern void longjmp(jmp_buf, int) __attribute__((noreturn));
#endif
#else
-#define setjmp __builtin_setjmp
#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 __gthread_key_t fc_key;
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
return 0;
}
+void *
+_Unwind_FindEnclosingFunction (void *pc __attribute__((unused)))
+{
+ return NULL;
+}
+
#ifndef __ia64__
_Unwind_Ptr
_Unwind_GetDataRelBase (struct _Unwind_Context *context __attribute__((unused)) )
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"
projects / msp430-gcc.git / blobdiff