summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/i386/longjmp.c
diff options
context:
space:
mode:
authorManuel Novoa III <mjn3@codepoet.org>2001-03-20 15:32:43 +0000
committerManuel Novoa III <mjn3@codepoet.org>2001-03-20 15:32:43 +0000
commitb49e8dfc28b83d925f7eb9e741656e822a8bd31c (patch)
treec20707f97ebd1b93ffc73de14f470c05a7033d98 /libc/sysdeps/linux/i386/longjmp.c
parent5e9139d3ad4edb9e5dcf08c8c5e610aab75364ff (diff)
Fix longjmp on i386. Also adds siglongjmp.
Diffstat (limited to 'libc/sysdeps/linux/i386/longjmp.c')
-rw-r--r--libc/sysdeps/linux/i386/longjmp.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/longjmp.c b/libc/sysdeps/linux/i386/longjmp.c
new file mode 100644
index 000000000..97a37e350
--- /dev/null
+++ b/libc/sysdeps/linux/i386/longjmp.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1991, 92, 94, 95, 97, 98 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 <stddef.h>
+#include <setjmp.h>
+#include <signal.h>
+
+
+extern void _longjmp_unwind (jmp_buf env, int val);
+extern void __longjmp(__jmp_buf __env, int __val)
+ __attribute__ ((__noreturn__));
+
+/* Set the signal mask to the one specified in ENV, and jump
+ to the position specified in ENV, causing the setjmp
+ call there to return VAL, or 1 if VAL is 0. */
+void
+__uClibc_siglongjmp (sigjmp_buf env, int val)
+{
+#if 0
+ /* Perform any cleanups needed by the frames being unwound. */
+ _longjmp_unwind (env, val);
+#endif
+
+ if (env[0].__mask_was_saved)
+ /* Restore the saved signal mask. */
+ (void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
+ (sigset_t *) NULL);
+
+ /* Call the machine-dependent function to restore machine state. */
+ __longjmp (env[0].__jmpbuf, val ?: 1);
+}
+
+__asm__(".weak longjmp; longjmp = __uClibc_siglongjmp");
+__asm__(".weak _longjmp; _longjmp = __uClibc_siglongjmp");
+__asm__(".weak siglongjmp; siglongjmp = __uClibc_siglongjmp");
+__asm__(".weak __sigprocmask; __sigprocmask = sigprocmask");