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.
2025-01-18 12:16:13 +08:00 · 1996-03-12 09:50:46 +00:00 · 1996-03-12 09:50:46 +00:00 · 1177c8babf
commit 1177c8babf
parent dd0e4e0c8b
12 changed files with 180 additions and 51 deletions
--- a/33
+++ b/33
@ -1,5 +1,38 @@
+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.
+
 Tue Mar 12 03:15:02 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

+	* 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.
+
 	* sysdeps/unix/sysv/linux/i386/fpu_control.h (_FPU_DEFAULT): Change
 	default to double precision, all interrupts masked; fdlibm requires.

--- a/7
+++ b/7
@ -276,13 +276,14 @@ S-CPPFLAGS = $(asm-CPPFLAGS)
 define +make-deps
 -@rm -f $@
 $(+mkdep) $< $(CPPFLAGS) $($(<:$*.%=%)-CPPFLAGS) | \
-sed -e 's,$*\.o,$(foreach o,$(object-suffixes),$(@:.d=$o)) $@,' \
+sed -e 's,$(subst .,\.,$*)\.o,$(foreach o,$(object-suffixes),$(@:.d=$o)) $@,' \
 $(sed-remove-objpfx) > $(@:.d=.T)
 mv -f $(@:.d=.T) $@
 endef
 ifneq (,$(objpfx))
-sed-remove-objpfx = -e 's@ $(subst @,\@,$(objpfx))@ $$(objpfx)@g' \
-		    -e 's@^$(subst @,\@,$(objpfx))@$$(objpfx)@g'
+sed-remove-objpfx = -e 's@ $(subst .,\., \
+				     $(subst @,\@,$(objpfx)))@ $$(objpfx)@g' \
+		    -e 's@^$(subst .,\.,$(subst @,\@,$(objpfx)))@$$(objpfx)@g'
 endif

 # Figure out the source filenames in this directory.
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@ -37,7 +37,7 @@ aux	:= errlist siglist
 distribute := _itoa.h printf-parse.h

 tests := tst-printf tstscanf test_rdwr test-popen tstgetln test-fseek \
-	 temptest tst-fileno test-fwrite \
+	 temptest tst-fileno test-fwrite tst-ungetc \
 	 xbug errnobug \
 	 bug1 bug2 bug3 bug4 bug5 bug6 bug7 bug8 bug9 bug10 bug11 \
 	 tfformat tiformat tstdiomisc \
--- a/stdio-common/printf_fp.c
+++ b/stdio-common/printf_fp.c
@ -208,7 +208,9 @@ __printf_fp (FILE *fp,
 	      tmp[fracsize - scalesize] = hi;
 	      hi = tmp[0];

-	      fracsize = __mpn_normal_size (frac, scalesize);
+	      fracsize = scalesize;
+	      while (fracsize != 0 && frac[fracsize - 1] == 0)
+		--fracsize;
 	      if (fracsize == 0)
 		{
 		  /* We're not prepared for an mpn variable with zero
--- a/stdio-common/tst-ungetc.c
+++ b/stdio-common/tst-ungetc.c
@ -0,0 +1,42 @@
+/* Test for ungetc bugs.  */
+
+#include <stdio.h>
+
+#define assert(x) \
+  if (!(x)) \
+    { \
+      fputs ("test failed: " #x "\n", stderr); \
+      retval = 1; \
+      goto the_end; \
+    }
+
+int
+main (int argc, char *argv[])
+{
+  char *name;
+  FILE *fp = NULL;
+  int retval = 0;
+  int c;
+
+  name = tmpnam (NULL);
+  fp = fopen (name, "w");
+  assert (fp != NULL)
+  fputs ("bl", fp);
+  fclose (fp);
+  fp = NULL;
+
+  fp = fopen (name, "r");
+  assert (fp != NULL)
+  assert (getc (fp) != EOF);
+  assert ((c = getc (fp)) != EOF);
+  assert (getc (fp) == EOF);
+  assert (ungetc (c, fp) == c);
+  assert (feof (fp) == 0);
+
+the_end:
+  if (fp != NULL)
+    fclose (fp);
+  unlink (name);
+
+  return retval;
+}
--- a/stdio-common/tstscanf.c
+++ b/stdio-common/tstscanf.c
@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 1992, 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
@ -36,6 +36,13 @@ DEFUN(main, (argc, argv), int argc AND char **argv)
  if (sscanf ("0", "%d", &x) != 1)
    exit (EXIT_FAILURE);

+  sscanf ("conversion] Zero flag Ze]ro#\n", "%*[^]] %[^#]\n", buf);
+  if (strcmp (buf, "] Zero flag Ze]ro") != 0)
+    {
+      fputs ("test failed!", stderr);
+      return 1;
+    }
+
  if (argc == 2 && !strcmp (argv[1], "-opipe"))
    {
      out = popen ("/bin/cat", "w");
--- a/sysdeps/libm-ieee754/s_scalbn.c
+++ b/sysdeps/libm-ieee754/s_scalbn.c
@ -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
 {
@ -53,13 +53,13 @@ tiny   = 1.0e-300;
 	    }
        if (k==0x7ff) return x+x;		/* NaN or Inf */
        k = k+n;
-        if (k >  0x7fe) return huge*copysign(huge,x); /* overflow  */
+        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;
--- 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.  */
+	/* 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:

-	/* if (%o1 == 0) %o1 = 1; */
-	tst %o1
-	be,a Ldone
-	mov 1, %o1
+	/* Cache target FP in register %g7.  */
+	ld ENV (JB_FP), %g7

-Ldone:	retl
-	/* On the way out, put the return value in %o0.  */
-	restore %o1, 0, %o0
+	/* 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.  */
--- 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)]
--- 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;
--- a/sysdeps/unix/sysv/linux/sigsuspend.c
+++ 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);
+}
--- 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