From b49e8dfc28b83d925f7eb9e741656e822a8bd31c Mon Sep 17 00:00:00 2001 From: Manuel Novoa III Date: Tue, 20 Mar 2001 15:32:43 +0000 Subject: Fix longjmp on i386. Also adds siglongjmp. --- libc/sysdeps/linux/i386/longjmp.c | 51 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 libc/sysdeps/linux/i386/longjmp.c (limited to 'libc/sysdeps/linux/i386/longjmp.c') 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 +#include +#include + + +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"); -- cgit v1.2.3