Remove pre-Solaris 11/SPARC unwinding support

	* config/sparc/sol2-unwind.h [__arch64__] (sparc64_is_sighandler):
	Remove Solaris 9 and 10 support.
	(sparc_is_sighandler): Likewise.

From-SVN: r271715

libgcc/ChangeLog

+2019-05-28  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* config/sparc/sol2-unwind.h [__arch64__] (sparc64_is_sighandler):
+	Remove Solaris 9 and 10 support.
+	(sparc_is_sighandler): Likewise.
+
 2019-05-26  John David Anglin  <danglin@gcc.gnu.org>
 
 	* config/pa/linux-unwind.h (pa32_fallback_frame_state): Add cast.

libgcc/config/sparc/sol2-unwind.h

@@ -67,51 +67,7 @@ sparc64_is_sighandler (unsigned int *pc, void *cfa, int *nframes)
 	   libc.so.1:
 
 	   <call_user_handler+864>:     mov  %i1, %o1
-	   <call_user_handler+868>:     call __sighndlr
-
-	   This is the same setup as for Solaris 10, see below.  */
-	*nframes = 3;
-
-      else if (cuh_pattern == 0xd25fa7ef)
-	{
-	  /* This matches the call_user_handler pattern in Solaris 10
-	     libc.so.1:
-
-	     <call_user_handler+988>:     ldx  [ %fp + 0x7ef ], %o1
-	     <call_user_handler+992>:     call __sighndlr
-
-	     There are 2 cases so we look for the return address of the
-	     caller's caller frame in order to do more pattern matching.  */
-	  unsigned long sah_address = *(unsigned long *)(cfa + 176 + 15*8);
-
-          if (sah_address && *(unsigned int *)(sah_address - 4) == 0x92100019)
-	    /* We need to move up three frames:
-
-		<signal handler>	<-- context->cfa
-		__sighndlr
-		call_user_handler
-		sigacthandler
-		<kernel>  */
-	    *nframes = 3;
-	  else
-	    /* The sigacthandler frame isn't present in the chain.
-	       We need to move up two frames:
-
-		<signal handler>	<-- context->cfa
-		__sighndlr
-		call_user_handler
-		<kernel>  */
-	    *nframes = 2;
-	}
-
-      else if (cuh_pattern == 0x9410001a || cuh_pattern == 0x9410001b)
-	/* This matches the call_user_handler pattern in Solaris 9
-	   libthread.so.1:
-
-	   <call_user_handler+600>:     mov  %i2, %o2
-	   <call_user_handler+604>:     call  __sighndlr
-
-	   This is the same setup as for Solaris 10, see above.  */
+	   <call_user_handler+868>:     call __sighndlr  */
 	*nframes = 3;
 
       return 1;
@@ -184,51 +140,7 @@ sparc_is_sighandler (unsigned int *pc, void *cfa, int *nframes)
 	   libc.so.1:
 
 	   <call_user_handler+876>:     mov  %i1, %o1
-	   <call_user_handler+880>:     call __sighndlr
-
-	   This is the same setup as for Solaris 10, see below.  */
-	*nframes = 3;
-
-      else if (cuh_pattern == 0xd407a04c)
-	{
-	  /* This matches the call_user_handler pattern in Solaris 10
-	     libc.so.1:
-
-	     <call_user_handler+948>:     ld  [ %fp + 0x4c ], %o2
-	     <call_user_handler+952>:     call __sighndlr
-
-	     There are 2 cases so we look for the return address of the
-	     caller's caller frame in order to do more pattern matching.  */
-	  unsigned int sah_address = *(unsigned int *)(cfa + 96 + 15*4);
-
-          if (sah_address && *(unsigned int *)(sah_address - 4) == 0x92100019)
-	    /* We need to move up three frames:
-
-		<signal handler>	<-- context->cfa
-		__sighndlr
-		call_user_handler
-		sigacthandler
-		<kernel>  */
-	    *nframes = 3;
-	  else
-	    /* The sigacthandler frame isn't present in the chain.
-	       We need to move up two frames:
-
-		<signal handler>	<-- context->cfa
-		__sighndlr
-		call_user_handler
-		<kernel>  */
-	    *nframes = 2;
-	}
-
-      else if (cuh_pattern == 0x9410001a || cuh_pattern == 0x9410001b)
-	/* This matches the call_user_handler pattern in Solaris 9
-	   libthread.so.1:
-
-	   <call_user_handler+560>:      mov  %i2, %o2
-	   <call_user_handler+564>:      call  __sighndlr
-
-	   This is the same setup as for Solaris 10, see above.  */
+	   <call_user_handler+880>:     call __sighndlr  */
 	*nframes = 3;
 
       return 1;