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-rw-r--r--sysdeps/i386/setjmp.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/i386/setjmp.c b/sysdeps/i386/setjmp.c
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+/* Copyright (C) 1991, 1992, 1994 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. */
+
+/* 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)
+
+#define REG(xx) register long int xx asm (#xx)
+REGS;
+#undef REG
+
+#include <errno.h>
+#include <setjmp.h>
+
+/* Save the current program position in ENV and return 0. */
+int
+__sigsetjmp (jmp_buf env, int savemask)
+{
+ /* Save the general registers. */
+#define REG(xx) env[0].__jmpbuf[0].__##xx = xx
+ REGS;
+#undef REG
+
+ /* Save the return PC. */
+ env[0].__jmpbuf[0].__pc = ((void **) &env)[-1];
+
+ /* Save caller's FP, not our own. */
+ env[0].__jmpbuf[0].__bp = ((void **) &env)[-2];
+
+ /* Save caller's SP, not our own. */
+ env[0].__jmpbuf[0].__sp = (void *) &env;
+
+ /* Save the signal mask if requested. */
+ return __sigjmp_save (env, savemask);
+}