tm.texi (MD_UNWIND_SUPPORT): Document.

	* doc/tm.texi (MD_UNWIND_SUPPORT): Document.
	(MD_FALLBACK_FRAME_STATE_FOR): Update.
	* unwind-dw2.c (MD_UNWIND_SUPPORT): #include if defined.
	(uw_frame_state_for): Adjust MD_FALLBACK_FRAME_STATE_FOR invocation.
	(MD_FROB_UPDATE_CONTEXT): Remove default.
	(uw_update_context_1): Instead #ifdef invocation.
	* config/ia64/unwind-ia64.c (MD_UNWIND_SUPPORT): #include if defined.
	(uw_frame_state_for): Adjust MD_FALLBACK_FRAME_STATE_FOR invocation.
	* config/alpha/gnu.h (MD_FALLBACK_FRAME_STATE_FOR): Don't undef.
	(MD_UNWIND_SUPPORT): Undefine this instead.
	* config/i386/gnu.h: Likewise.
	* config/alpha/linux-unwind.h: New file, macro converted to
	function, extracted from..
	* config/alpha/linux.h (MD_FALLBACK_FRAME_STATE_FOR): ..this.
	(MD_UNWIND_SUPPORT): Define.
	* config/alpha/vms-unwind.h, config/alpha/vms.h: Likewise.
	* config/i386/linux-unwind.h, config/i386/linux.h,
	config/i386/linux64.h: Likewise.
	* config/ia64/linux-unwind.h, config/ia64/linux.h: Likewise.
	MD_HANDLE_UNWABI too.
	* config/mips/linux-unwind.h, config/mips/linux.h: Likewise.
	* config/pa/linux-unwind.h, config/pa/pa32-linux.h: Likewise.
	* config/rs6000/darwin-unwind.h, config/rs6000/darwin.h: Likewise.
	* config/s390/linux-unwind.h, config/s390/linux.h: Likewise.
	* config/sparc/linux-unwind.h, config/sparc/linux.h,
	config/sparc/linux64.h: Likewise.
	* config/sh/linux-unwind.h, config/sh/linux.h: Likewise, but merge
	SH_FALLBACK_FRAME_FLOAT_STATE into sh_fallback_frame_state.
	* config/rs6000/linux-unwind.h, config/rs6000/linux.h,
	config/rs6000/linux64.h: Likewise.  Split out get_sigcontext
	function.  Use ARG_POINTER_REGNUM for 32-bit temp reg too.

From-SVN: r87167

1 files changed, 1 insertions, 83 deletions

diff --git a/gcc/config/rs6000/linux.h b/gcc/config/rs6000/linux.h
index 83aef83..0f4d046 100644
--- a/gcc/config/rs6000/linux.h
+++ b/gcc/config/rs6000/linux.h
@@ -98,88 +98,6 @@
 
 #define TARGET_HAS_F_SETLKW
 
-/* Do code reading to identify a signal frame, and set the frame
-   state data appropriately.  See unwind-dw2.c for the structs.  */
-
-#ifdef IN_LIBGCC2
-#include <signal.h>
-
-/* During the 2.5 kernel series the kernel ucontext was changed, but
-   the new layout is compatible with the old one, so we just define
-   and use the old one here for simplicity and compatibility.  */
-
-struct kernel_old_ucontext {
-  unsigned long     uc_flags;
-  struct ucontext  *uc_link;
-  stack_t           uc_stack;
-  struct sigcontext_struct uc_mcontext;
-  sigset_t          uc_sigmask;
-};
-
-enum { SIGNAL_FRAMESIZE = 64 };
-#endif
-
-#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)		\
-  do {									\
-    unsigned char *pc_ = (CONTEXT)->ra;					\
-    struct sigcontext *sc_;						\
-    long new_cfa_;							\
-    int i_;								\
-									\
-    /* li r0, 0x7777; sc  (sigreturn old)  */				\
-    /* li r0, 0x0077; sc  (sigreturn new)  */				\
-    /* li r0, 0x6666; sc  (rt_sigreturn old)  */			\
-    /* li r0, 0x00AC; sc  (rt_sigreturn new)  */			\
-    if (*(unsigned int *) (pc_+4) != 0x44000002)			\
-      break;								\
-    if (*(unsigned int *) (pc_+0) == 0x38007777				\
-	|| *(unsigned int *) (pc_+0) == 0x38000077)			\
-      {									\
-	struct sigframe {						\
-	  char gap[SIGNAL_FRAMESIZE];					\
-	  struct sigcontext sigctx;					\
-	} *rt_ = (CONTEXT)->cfa;					\
-	sc_ = &rt_->sigctx;						\
-      }									\
-    else if (*(unsigned int *) (pc_+0) == 0x38006666			\
-	     || *(unsigned int *) (pc_+0) == 0x380000AC)		\
-      {									\
-	struct rt_sigframe {						\
-	  char gap[SIGNAL_FRAMESIZE];					\
-	  unsigned long _unused[2];					\
-	  struct siginfo *pinfo;					\
-	  void *puc;							\
-	  struct siginfo info;						\
-	  struct kernel_old_ucontext uc;				\
-	} *rt_ = (CONTEXT)->cfa;					\
-	sc_ = &rt_->uc.uc_mcontext;					\
-      }									\
-    else								\
-      break;								\
-    									\
-    new_cfa_ = sc_->regs->gpr[STACK_POINTER_REGNUM];			\
-    (FS)->cfa_how = CFA_REG_OFFSET;					\
-    (FS)->cfa_reg = STACK_POINTER_REGNUM;				\
-    (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;		\
-    									\
-    for (i_ = 0; i_ < 32; i_++)						\
-      if (i_ != STACK_POINTER_REGNUM)					\
-	{	    							\
-	  (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;			\
-	  (FS)->regs.reg[i_].loc.offset 				\
-	    = (long)&(sc_->regs->gpr[i_]) - new_cfa_;			\
-	}								\
-									\
-    (FS)->regs.reg[LINK_REGISTER_REGNUM].how = REG_SAVED_OFFSET;	\
-    (FS)->regs.reg[LINK_REGISTER_REGNUM].loc.offset 			\
-      = (long)&(sc_->regs->link) - new_cfa_;				\
-									\
-    (FS)->regs.reg[CR0_REGNO].how = REG_SAVED_OFFSET;			\
-    (FS)->regs.reg[CR0_REGNO].loc.offset 				\
-      = (long)&(sc_->regs->nip) - new_cfa_;				\
-    (FS)->retaddr_column = CR0_REGNO;					\
-    goto SUCCESS;							\
-  } while (0)
-
+#define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
 
 #define OS_MISSING_POWERPC64 1