Thu Oct 26 00:11:13 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

	* sysdeps/unix/sysv/linux/i386/sigaction.c: New file.

	* sysdeps/unix/sysv/linux/i386/xstat.S: Don't use JUMPTARGET macro
	on syscall_error.  For PIC, it is a local label;
	for non-PIC, JUMPTARGET expands to the unadorned name anyway.
	* sysdeps/unix/sysv/linux/i386/xmknod.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/syscall.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/socket.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/sbrk.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/mmap.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/brk.S: Likewise.

1 files changed, 86 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/sigaction.c b/sysdeps/unix/sysv/linux/i386/sigaction.c
new file mode 100644
index 0000000000..6986290da5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/sigaction.c
@@ -0,0 +1,86 @@
+/* POSIX.1 `sigaction' call for Linux/i386.
+Copyright (C) 1991, 1995 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.  */
+
+#include <sysdep.h>
+#include <errno.h>
+#include <stddef.h>
+#include <signal.h>
+
+
+/* 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
+__sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
+{
+  struct sigaction newact;
+  int result;
+
+  if (new)
+    {
+      newact = *new;
+      new = &newact;
+      new->sa_restorer = ((new->sa_flags & SA_NOMASK)
+			  ? &&restore_nomask : &&restore);
+    }
+
+  asm volatile ("pushl %%ebx\n"
+		"movl %1, %%ebx\n"
+		"int $0x80\n"
+		"popl %%ebx"
+		: "=a" (result)
+		: "0" (SYS_ify (sigaction)), "g" (sig), "c" (new), "d" (old));
+
+  if (result < 0)
+    {
+      errno = -result;
+      return -1;
+    }
+  return 0;
+
+ restore:
+  asm (
+#ifdef	PIC
+       "	pushl %ebx\n"
+       "	call 0f\n"
+       "0:	popl %ebx\n"
+       "	addl $_GLOBAL_OFFSET_TABLE_+[.-0b],%ebx\n"
+       "	addl $8, %%esp\n"
+       "	call __sigsetmask@PLT\n"
+       "	addl $8, %%esp\n"
+       "	popl %ebx\n"
+#else
+       "	addl $4, %%esp\n"
+       "	call __sigsetmask\n"
+       "	addl $4, %%esp\n"
+#endif
+       "popl %eax\n"
+       "popl %ecx\n"
+       "popl %edx\n"
+       "popf\n"
+       "ret");
+ restore_nomask:
+  asm ("addl $4, %esp\n"
+       "popl %eax\n"
+       "popl %ecx\n"
+       "popl %edx\n"
+       "popf\n"
+       "ret");
+}
+
+weak_alias (__sigaction, sigaction)