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Diffstat (limited to 'libsigsegv/src/leave-setcontext.c')
-rw-r--r-- | libsigsegv/src/leave-setcontext.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/libsigsegv/src/leave-setcontext.c b/libsigsegv/src/leave-setcontext.c deleted file mode 100644 index e383cf96..00000000 --- a/libsigsegv/src/leave-setcontext.c +++ /dev/null @@ -1,38 +0,0 @@ -/* Leaving a signal handler executing on the alternate stack. - Copyright (C) 2002 Bruno Haible <bruno@clisp.org> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -#include <signal.h> -#include <ucontext.h> - -void -sigsegv_reset_onstack_flag (void) -{ - ucontext_t uc; - - if (getcontext (&uc) >= 0) - /* getcontext returns twice. We are interested in the returned context - only the first time, i.e. when the SS_ONSTACK bit is set. */ - if (uc.uc_stack.ss_flags & SS_ONSTACK) - { - uc.uc_stack.ss_flags &= ~SS_ONSTACK; - /* Note that setcontext() does not refill uc. Therefore if - setcontext() keeps SS_ONSTACK set in the kernel, either - setcontext() will return -1 or getcontext() will return a - second time, with the SS_ONSTACK bit being cleared. */ - setcontext (&uc); - } -} |