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2010-04-27 Jakub Jelinek <jakub@redhat.com>
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* unwind-dw2.c (_Unwind_DebugHook): Add used attribute.
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2009-05-27 Tom Tromey <tromey@redhat.com>
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* unwind-dw2.c (_Unwind_DebugHook): New function.
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(uw_install_context): Call _Unwind_DebugHook.
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--- gcc/unwind-dw2.c (revision 147933)
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+++ gcc/unwind-dw2.c (revision 147934)
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@@ -1473,18 +1473,32 @@ uw_init_context_1 (struct _Unwind_Contex
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context->ra = __builtin_extract_return_addr (outer_ra);
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}
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+static void _Unwind_DebugHook (void *, void *)
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+ __attribute__ ((__noinline__, __used__));
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+
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+/* This function is called during unwinding. It is intended as a hook
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+ for a debugger to intercept exceptions. CFA is the CFA of the
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+ target frame. HANDLER is the PC to which control will be
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+ transferred. */
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+static void
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+_Unwind_DebugHook (void *cfa __attribute__ ((__unused__)),
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+ void *handler __attribute__ ((__unused__)))
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+{
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+ asm ("");
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+}
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/* Install TARGET into CURRENT so that we can return to it. This is a
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macro because __builtin_eh_return must be invoked in the context of
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our caller. */
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-#define uw_install_context(CURRENT, TARGET) \
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- do \
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- { \
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- long offset = uw_install_context_1 ((CURRENT), (TARGET)); \
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- void *handler = __builtin_frob_return_addr ((TARGET)->ra); \
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- __builtin_eh_return (offset, handler); \
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- } \
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+#define uw_install_context(CURRENT, TARGET) \
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+ do \
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+ { \
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+ long offset = uw_install_context_1 ((CURRENT), (TARGET)); \
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+ void *handler = __builtin_frob_return_addr ((TARGET)->ra); \
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+ _Unwind_DebugHook ((TARGET)->cfa, handler); \
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+ __builtin_eh_return (offset, handler); \
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+ } \
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while (0)
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static long
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