diff options
Diffstat (limited to 'newlib/libc/sys/linux/machine/i386/sigaction.c')
| -rw-r--r-- | newlib/libc/sys/linux/machine/i386/sigaction.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/newlib/libc/sys/linux/machine/i386/sigaction.c b/newlib/libc/sys/linux/machine/i386/sigaction.c deleted file mode 100644 index 6edcb0ae7..000000000 --- a/newlib/libc/sys/linux/machine/i386/sigaction.c +++ /dev/null @@ -1,114 +0,0 @@ -/* POSIX.1 `sigaction' call for Linux/i386. - Copyright (C) 1991, 95, 96, 97, 98, 99, 2000 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stddef.h> -#include <signal.h> -#include <string.h> - -#include <machine/syscall.h> - -/* The difference here is that the sigaction structure used in the - kernel is not the same as we use in the libc. Therefore we must - translate it here. */ -#include <kernel_sigaction.h> - -/* We do not globally define the SA_RESTORER flag so do it here. */ -#define SA_RESTORER 0x04000000 - -#define __NR___rt_sigaction __NR_rt_sigaction - -static _syscall4(int,__rt_sigaction,int,sig,const struct kernel_sigaction *,act, - struct kernel_sigaction *,oact,size_t,size) - -static void restore_rt (void) asm ("__restore_rt"); -static void restore (void) asm ("__restore"); - -/* If ACT is not NULL, change the action for SIG to *ACT. - If OACT is not NULL, put the old action for SIG in *OACT. */ -int -__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact) -{ - int result; - struct kernel_sigaction kact, koact; - - if (act) - { - kact.k_sa_handler = act->sa_handler; - memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); - kact.sa_flags = act->sa_flags | SA_RESTORER; - - kact.sa_restorer = ((act->sa_flags & SA_SIGINFO) - ? &restore_rt : &restore); - } - - /* XXX The size argument hopefully will have to be changed to the - real size of the user-level sigset_t. */ - result = __rt_sigaction(sig, act ? (&kact) : NULL, - oact ? (&koact) : NULL, _NSIG / 8); - - if (oact && result >= 0) - { - oact->sa_handler = koact.k_sa_handler; - memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); - oact->sa_flags = koact.sa_flags; - oact->sa_restorer = koact.sa_restorer; - } - return result; -} - -weak_alias (__libc_sigaction, __sigaction) -weak_alias (__libc_sigaction, sigaction) - -/* NOTE: Please think twice before making any changes to the bits of - code below. GDB needs some intimate knowledge about it to - recognize them as signal trampolines, and make backtraces through - signal handlers work right. Important are both the names - (__restore and __restore_rt) and the exact instruction sequence. - If you ever feel the need to make any changes, please notify the - appropriate GDB maintainer. */ - -#define RESTORE(name, syscall) RESTORE2 (name, syscall) -#define RESTORE2(name, syscall) \ -asm \ - ( \ - ".text\n" \ - " .align 16\n" \ - "__" #name ":\n" \ - " movl $" #syscall ", %eax\n" \ - " int $0x80" \ - ); - -/* The return code for realtime-signals. */ -RESTORE (restore_rt, __NR_rt_sigreturn) - -/* For the boring old signals. */ -# undef RESTORE2 -# define RESTORE2(name, syscall) \ -asm \ - ( \ - ".text\n" \ - " .align 8\n" \ - "__" #name ":\n" \ - " popl %eax\n" \ - " movl $" #syscall ", %eax\n" \ - " int $0x80" \ - ); - -RESTORE (restore, __NR_sigreturn) |