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-rw-r--r--sysdeps/libm-ieee754/s_scalbn.c24
-rw-r--r--sysdeps/sparc/__longjmp.S63
-rw-r--r--sysdeps/sparc/setjmp.S14
-rw-r--r--sysdeps/unix/sysv/linux/i386/fpu_control.h2
-rw-r--r--sysdeps/unix/sysv/linux/sigsuspend.c33
-rw-r--r--sysdeps/unix/sysv/linux/syscalls.list2
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 01:47:38 +0000