dwarf2-signal.h (SIGNAL_HANDLER): Name siginfo_t pointer arg.

2002-04-19  David S. Miller  <davem@redhat.com>

	* include/dwarf2-signal.h (SIGNAL_HANDLER): Name siginfo_t pointer
	arg.
	(MAKE_THROW_FRAME): Define for 32-bit and 64-bit sparc.
	(INIT_SEGV, INIT_FPE): Use direct __libc_sigaction installation
	on Sparc too.
	* include/sparc-signal.h (FLUSH_REGISTER_WINDOWS): Define properly
	for 64-bit sparc.
	(MAKE_THROW_FRAME): Use long for sp/retaddr so 64-bit works.
	* sysdeps/sparc/locks.h: New file.
	* configure.in (SIGNAL_HANDLER): Set to include/sparc-signal.h
	on all sparc Solaris configurations.  Set to
	include/dwarf2-signal.h on sparc Linux.
	* configure: Regenerate
	* configure.host (can_unwind_signal): sparc*-linux* can do it now.

From-SVN: r52575

1 files changed, 51 insertions, 4 deletions

diff --git a/libjava/include/dwarf2-signal.h b/libjava/include/dwarf2-signal.h
index cde0fa9..0828705 100644
--- a/libjava/include/dwarf2-signal.h
+++ b/libjava/include/dwarf2-signal.h
@@ -21,7 +21,7 @@ details.  */
 #undef HANDLE_FPE
 
 #define SIGNAL_HANDLER(_name)	\
-static void _Jv_##_name (int, siginfo_t *, void *_p)
+static void _Jv_##_name (int, siginfo_t *_sip, void *_p)
 
 class java::lang::Throwable;
 
@@ -58,6 +58,53 @@ do									\
   _sc->sc_ip++;								\
 }									\
 while (0)
+#elif defined(__sparc__)
+/* We could do the unwind of the signal frame quickly by hand here like
+   sparc-signal.h does under Solaris, but that makes debugging unwind
+   failures almost impossible.  */
+#if !defined(__arch64__)
+#define MAKE_THROW_FRAME(_exception)					\
+do									\
+{									\
+  /* Sparc-32 leaves PC pointing at a faulting instruction		\
+   always.  So we adjust the saved PC to point to the following		\
+   instruction; this is what the handler in libgcc expects.  */		\
+  /* Note that we are lying to the unwinder here, which expects the	\
+   faulting pc, not pc+1.  But we claim the unwind information can't	\
+   be changed by such a ld or st instruction, so it doesn't matter. */	\
+  struct sig_regs {							\
+    unsigned int psr, pc, npc, y, u_regs[16];				\
+  } *regp;								\
+  unsigned int insn;							\
+  __asm__ __volatile__("ld [%%i7 + 8], %0" : "=r" (insn));		\
+  if (insn == 0x821020d8)						\
+    regp = (struct sig_regs *) _sip;					\
+  else									\
+    regp = (struct sig_regs *) (_sip + 1);				\
+  regp->pc = regp->npc;							\
+  regp->npc += 4;							\
+}									\
+while (0)
+#else
+#define MAKE_THROW_FRAME(_exception)					\
+do									\
+{									\
+  /* Sparc-64 leaves PC pointing at a faulting instruction		\
+   always.  So we adjust the saved PC to point to the following		\
+   instruction; this is what the handler in libgcc expects.  */		\
+  /* Note that we are lying to the unwinder here, which expects the	\
+   faulting pc, not pc+1.  But we claim the unwind information can't	\
+   be changed by such a ld or st instruction, so it doesn't matter. */	\
+  struct pt_regs {							\
+    unsigned long u_regs[16];						\
+    unsigned long tstate, tpc, tnpc;					\
+    unsigned int y, fprs;						\
+  } *regp = (struct pt_regs *) (_sip + 1);				\
+  regp->tpc = regp->tnpc;						\
+  regp->tnpc += 4;							\
+}									\
+while (0)
+#endif
 #else
 #define MAKE_THROW_FRAME(_exception)		\
 do						\
@@ -67,7 +114,7 @@ do						\
 while (0)
 #endif
 
-#ifndef __ia64__
+#if !(defined(__ia64__) || defined(__sparc__))
 #define INIT_SEGV						\
 do								\
   {								\
@@ -100,7 +147,7 @@ while (0)
  * go away once all systems have pthreads libraries that are
  * compiled with full unwind info.  */
 
-#else  /* __ia64__ */
+#else  /* __ia64__ || __sparc__ */
 
 // FIXME: We shouldn't be using libc_sigaction here, since it should
 // be glibc private.  But using syscall here would mean translating to
@@ -136,5 +183,5 @@ do								\
     __libc_sigaction (SIGFPE, &act, NULL);			\
   }								\
 while (0)  
-#endif /* __ia64__ */
+#endif /* __ia64__ || __sparc__ */
 #endif /* JAVA_SIGNAL_H */