Tue Mar 12 04:42:01 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>

	* sysdeps/sparc/jmp_buf.h: Rewritten; use array of ints, not struct.
	* sysdeps/sparc/setjmp.S: Rewritten; store %fp value as well.
	* sysdeps/sparc/__longjmp.S: Rewritten; unwind frames one by one with
	`restore' until the target frame is hit.

Sun Mar 10 20:29:40 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/sigsuspend.c: New file.
	* sysdeps/unix/sysv/linux/syscalls.list: Remove sigsuspend, add
	s_sigsuspend.

Thu Mar  7 21:30:58 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makerules (+make-deps, sed-remove-objpfx): Quote periods on the
	left side of sed substitutions.

Sun Mar 10 16:58:10 1996  Ulrich Drepper  <drepper@gnu.ai.mit.edu>

	* stdio-common/printf_fp.c (hack_digit): __mpn_normal_size
	is not available anymore.  Do it ourselves.

	* sysdeps/unix/sysv/linux/i386/fpu_control.h (_FPU_SETCW):
	Correct GCC `asm' syntax.

	* stdio-common/Makefile (tests): Add tst-ungetc.
	* stdio-common/tst-ungetc.c: New test from drepper.
	* stdio-common/tstscanf.c (main): New %[ test case from drepper.

	* sysdeps/libm-ieee754/s_scalbn.c (scalbn): Rename to __scalbn;
	somehow this was missed, though the weak alias is already there.

6 files changed, 91 insertions, 47 deletions

diff --git a/sysdeps/libm-ieee754/s_scalbn.c b/sysdeps/libm-ieee754/s_scalbn.c
index 835f00ea77..6efaec07ac 100644
--- a/sysdeps/libm-ieee754/s_scalbn.c
+++ b/sysdeps/libm-ieee754/s_scalbn.c
@@ -5,7 +5,7 @@
  *
  * Developed at SunPro, a Sun Microsystems, Inc. business.
  * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice 
+ * software is freely granted, provided that this notice
  * is preserved.
  * ====================================================
  */
@@ -14,10 +14,10 @@
 static char rcsid[] = "$NetBSD: s_scalbn.c,v 1.8 1995/05/10 20:48:08 jtc Exp $";
 #endif
 
-/* 
+/*
  * scalbn (double x, int n)
- * scalbn(x,n) returns x* 2**n  computed by  exponent  
- * manipulation rather than by actually performing an 
+ * scalbn(x,n) returns x* 2**n  computed by  exponent
+ * manipulation rather than by actually performing an
  * exponentiation or a multiplication.
  */
 
@@ -35,9 +35,9 @@ huge   = 1.0e+300,
 tiny   = 1.0e-300;
 
 #ifdef __STDC__
-	double scalbn (double x, int n)
+	double __scalbn (double x, int n)
 #else
-	double scalbn (x,n)
+	double __scalbn (x,n)
 	double x; int n;
 #endif
 {
@@ -46,20 +46,20 @@ tiny   = 1.0e-300;
         k = (hx&0x7ff00000)>>20;		/* extract exponent */
         if (k==0) {				/* 0 or subnormal x */
             if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */
-	    x *= two54; 
+	    x *= two54;
 	    GET_HIGH_WORD(hx,x);
-	    k = ((hx&0x7ff00000)>>20) - 54; 
+	    k = ((hx&0x7ff00000)>>20) - 54;
             if (n< -50000) return tiny*x; 	/*underflow*/
 	    }
         if (k==0x7ff) return x+x;		/* NaN or Inf */
-        k = k+n; 
-        if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */
+        k = k+n;
+        if (k >  0x7fe) return huge*__copysign(huge,x); /* overflow  */
         if (k > 0) 				/* normal result */
 	    {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;}
         if (k <= -54)
             if (n > 50000) 	/* in case integer overflow in n+k */
-		return huge*copysign(huge,x);	/*overflow*/
-	    else return tiny*copysign(tiny,x); 	/*underflow*/
+		return huge*__copysign(huge,x);	/*overflow*/
+	    else return tiny*__copysign(tiny,x); 	/*underflow*/
         k += 54;				/* subnormal result */
 	SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20));
         return x*twom54;
diff --git a/sysdeps/sparc/__longjmp.S b/sysdeps/sparc/__longjmp.S
index adff06e349..38bc7bbac8 100644
--- a/sysdeps/sparc/__longjmp.S
+++ b/sysdeps/sparc/__longjmp.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1993, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -17,31 +17,42 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
 #include <sysdep.h>
-#ifdef __svr4__
-#include <sys/trap.h>
-#else
-#include <machine/trap.h>
-#endif
 
-/* NOTE: This code depends on the definition of `__jmp_buf' in <jmp_buf.h>.  */
+#include <jmp_buf.h>
+#define ENV(reg) [%g1 + (reg * 4)]
 
 ENTRY (__longjmp)
-	/* Do a "flush register windows trap".  The trap handler in the
-	   kernel writes all the register windows to their stack slots, and
-	   marks them all as invalid (needing to be sucked up from the
-	   stack when used).  This ensures that all information needed to
-	   unwind to these callers is in memory, not in the register
-	   windows.  */
-	ta ST_FLUSH_WINDOWS
-	ld [%o0], %o7		/* Return PC.  */
-	ld [%o0 + 4], %fp	/* Saved SP.  */
-	sub %fp, 64, %sp	/* Allocate a register save area.  */
-
-	/* if (%o1 == 0) %o1 = 1; */
-	tst %o1
-	be,a Ldone
-	mov 1, %o1
-
-Ldone:	retl
-	/* On the way out, put the return value in %o0.  */
-	restore %o1, 0, %o0
+	/* Store our arguments in global registers so we can still
+	   use them while unwinding frames and their register windows.  */
+	mov %o0, %g1		/* ENV in %g1 */
+     	orcc %o1, %g0, %g6	/* VAL in %g6 */
+     	be,a 0f			/* Branch if zero; else skip delay slot.  */
+	 mov 1, %g6		/* Delay slot only hit if zero: VAL = 1.  */
+0:
+
+	/* Cache target FP in register %g7.  */
+	ld ENV (JB_FP), %g7
+
+	/* Now we will loop, unwinding the register windows up the stack
+	   until the restored %fp value matches the target value in %g7.  */
+
+loop:	cmp %fp, %g7		/* Have we reached the target frame? */
+	bl,a loop		/* Loop while current fp is below target.  */
+	 restore		/* Unwind register window in delay slot.  */
+	be,a found		/* Better have hit it exactly.  */
+	 ld ENV (JB_SP), %o0	/* Delay slot: extract target SP.  */
+
+bogus:	/* Get here only if the jmp_buf or stack is clobbered.  */
+	call C_SYMBOL_NAME (abort)
+	nop
+	unimp 0
+
+found:	/* We have unwound register windows so %fp matches the target.  */
+	cmp %o0, %sp		/* Check jmp_buf SP vs register window.  */
+	bge,a sp_ok		/* Saved must not be deeper than register.  */
+	 mov %o0, %sp		/* OK, install new SP.  */
+	b,a bogus		/* Bogus, we lose.  */
+
+sp_ok:	ld ENV (JB_PC), %o0	/* Extract target return PC.  */
+	jmp %o0 + 8		/* Return there.  */
+	 mov %g6, %o0		/* Delay slot: set return value.  */
diff --git a/sysdeps/sparc/setjmp.S b/sysdeps/sparc/setjmp.S
index 3c9c18d00d..2cf92cddd7 100644
--- a/sysdeps/sparc/setjmp.S
+++ b/sysdeps/sparc/setjmp.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -17,15 +17,15 @@ not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
 #include <sysdep.h>
-
-/* NOTE: This code depends on the definition of `__jmp_buf' in <jmp_buf.h>.  */
+#include <jmp_buf.h>
 
 ENTRY (__sigsetjmp)
-	/* Save our return PC and SP (second store in the jmp delay slot).  */
-	st %o7, [%o0]
-	/* Save the signal mask if requested.  We do this as a tail-call
+	/* Save our SP and FP; in the delay slot of the jump, save our
+	   return PC.  Save the signal mask if requested with a tail-call
 	   for simplicity; it always returns zero.  */
 	sethi %hi(C_SYMBOL_NAME (__sigjmp_save)), %g1
+	st %sp, [%o0 + (JB_SP*4)]
 	or %lo(C_SYMBOL_NAME (__sigjmp_save)), %g1, %g1
+	st %fp, [%o0 + (JB_FP*4)]
 	jmp %g1
-	st %sp, [%o0 + 4]
+	 st %o7, [%o0 + (JB_PC*4)]
diff --git a/sysdeps/unix/sysv/linux/i386/fpu_control.h b/sysdeps/unix/sysv/linux/i386/fpu_control.h
index ed56d83943..8c04c1ea11 100644
--- a/sysdeps/unix/sysv/linux/i386/fpu_control.h
+++ b/sysdeps/unix/sysv/linux/i386/fpu_control.h
@@ -89,7 +89,7 @@ typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__HI__)));
 
 /* Macros for accessing the hardware control word.  */
 #define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (cw))
-#define _FPU_SETCW(cw) __asm__ ("fldcw %0" : "m" (cw))
+#define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (cw))
 
 /* Default control word set at startup.  */
 extern fpu_control_t __fpu_control;
diff --git a/sysdeps/unix/sysv/linux/sigsuspend.c b/sysdeps/unix/sysv/linux/sigsuspend.c
new file mode 100644
index 0000000000..53510b9648
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sigsuspend.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <signal.h>
+#include <stddef.h>
+#include <unistd.h>
+
+extern int __syscall_sigsuspend (int, unsigned long, unsigned long);
+
+/* Change the set of blocked signals to SET,
+   wait until a signal arrives, and restore the set of blocked signals.  */
+int
+DEFUN(sigsuspend, (set), CONST sigset_t *set)
+{
+  return __syscall_sigsuspend (0, 0, *set);
+}
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index 9601f0651e..7d199bdd2d 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -18,10 +18,10 @@ munlockall	-	munlockall	0	__munlockall	munlockall
 pipe		-	pipe		1	__pipe	pipe
 reboot		-	reboot		3	reboot
 s_ptrace	ptrace	ptrace		4	__syscall_ptrace
+s_sigsuspend	sigsuspend sigsuspend	3	__syscall_sigsuspend
 setpgid		-	setpgid		2	setpgid
 sigpending	-	sigpending	1	sigpending
 sigprocmask	-	sigprocmask	3	__sigprocmask	sigprocmask
-sigsuspend	-	sigsuspend	1	sigsuspend
 stty		-	stty		2	stty
 umount		-	umount		1	__umount	umount
 wait4		-	wait4		4	__wait4		wait4