Rewrote i386 setjmp in assembly.

Thu Aug 31 13:23:35 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* sysdeps/unix/i386/brk.S [PIC]: Set __curbrk through the GOT.

	Rewrote i386 setjmp code in assembly, so as to avoid fighting
	with the compiler for the register values.
	* sysdeps/i386/setjmp.S, sysdeps/i386/__longjmp.S: New files.
	* sysdeps/i386/setjmp.c, sysdeps/i386/__longjmp.c: Files removed.
	* sysdeps/i386/jmp_buf.h [! _ASM] (__jmp_buf): Define as array of ints.
	[__USE_MISC || _ASM] (JB_*): New macros, for indices therein.
	(_JMPBUF_UNWINDS): Use JB_SP.

1 files changed, 0 insertions, 66 deletions

diff --git a/sysdeps/i386/__longjmp.c b/sysdeps/i386/__longjmp.c
deleted file mode 100644
index 65d6ec18ec..0000000000
--- a/sysdeps/i386/__longjmp.c
+++ /dev/null
@@ -1,66 +0,0 @@
-/* Copyright (C) 1991, 1992, 1994, 1995 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., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
-
-#ifndef	__GNUC__
-  #error This file uses GNU C extensions; you must compile with GCC.
-#endif
-
-/* Put these global register declarations first, because we get an error if
-   they come after any function definition, including inlines which might
-   be in some header.  */
-
-#define REGS \
-  REG (bx);\
-  REG (si);\
-  REG (di);\
-  REG (bp);\
-  REG (sp)
-
-#define REG(xx) register long int xx asm (#xx)
-REGS;
-#undef	REG
-
-#include <ansidecl.h>
-#include <errno.h>
-#include <setjmp.h>
-#include <stdlib.h>
-
-/* Jump to the position specified by ENV, causing the
-   setjmp call there to return VAL, or 1 if VAL is 0.  */
-void
-DEFUN(__longjmp, (env, val),
-      __jmp_buf env AND int val)
-{
-  /* We specify explicit registers because, when not optimizing,
-     the compiler will generate code that uses the frame pointer
-     after it's been munged.  */
-
-  register CONST __typeof (env[0]) *e asm ("cx");
-  register int v asm ("ax");
-
-  e = env;
-  v = val == 0 ? 1 : val;
-
-#define	REG(xx)	xx = (long int) e->__##xx
-  REGS;
-
-  asm volatile ("jmp %*%0" : : "g" (e->__pc), "a" (v));
-
-  /* NOTREACHED */
-  abort ();
-}