* sysdeps/alpha/dl-machine.h (TRAMPOLINE_TEMPLATE): Move declaration of the trampoline function into the macro. * sysdeps/unix/sysv/linux/alpha/clone.S: Fix ldgp for PROF. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Revert last change; kernel 2.1.82 has this fixed. * sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: New file. * sysdeps/unix/sysv/linux/alpha/sys/ucontext.h: New file.

1998-01-26  Richard Henderson  <rth@cygnus.com>

	* sysdeps/alpha/dl-machine.h (TRAMPOLINE_TEMPLATE): Move declaration
	of the trampoline function into the macro.
	* sysdeps/unix/sysv/linux/alpha/clone.S: Fix ldgp for PROF.
	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Revert last change;
	kernel 2.1.82 has this fixed.

	* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: New file.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h: New file.

4 files changed, 120 insertions, 3 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/clone.S b/sysdeps/unix/sysv/linux/alpha/clone.S
index 3f097fe068..930e379296 100644
--- a/sysdeps/unix/sysv/linux/alpha/clone.S
+++ b/sysdeps/unix/sysv/linux/alpha/clone.S
@@ -28,14 +28,16 @@
 
         .text
 ENTRY(__clone)
-	.frame	sp,0,ra,0
 #ifdef PROF
+	ldgp	gp,0(pv)
 	.set noat
 	lda	AT, _mcount
 	jsr	AT, (AT), _mcount
 	.set at
-#endif
 	.prologue 1
+#else
+	.prologue 0
+#endif
 
 	/* Sanity check arguments.  */
 	ldiq	v0,EINVAL
diff --git a/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
new file mode 100644
index 0000000000..bcb2be0e28
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/rt_sigaction.S
@@ -0,0 +1,75 @@
+/* Copyright (C) 1998  Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson <rth@cygnus.com>, 1998
+
+   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 <sysdep.h>
+	
+/* On Alpha we desparately want to avoid having to issue an imb.  Ordinarily
+   the kernel would have to issue one after setting up the signal return
+   stack, but the Linux rt_sigaction syscall is prepared to accept a pointer
+   to the sigreturn syscall, instead of inlining it on the stack. 
+	
+   This just about halves signal delivery time.  */
+	
+   
+	.text
+ENTRY(__syscall_rt_sigaction)
+	.frame	sp,0,ra,0
+#ifdef PROF
+	ldgp	gp,0(pv)
+	.set noat
+	lda	AT, _mcount
+	jsr	AT, (AT), _mcount
+	.set at
+#endif
+	.prologue 1
+	
+	beq	a1, 0f
+	ldl	t0, 8(a1)
+	lda	a4, sigreturn-__syscall_rt_sigaction(pv)
+	lda	t1, rt_sigreturn-__syscall_rt_sigaction(pv)
+	and	t0, 0x00000040, t0			# SA_SIGINFO
+	cmovne	t0, t1, a4
+0:	ldi	v0,__NR_sigaction
+	callsys    
+	bne	a3,1f
+	ret
+	
+1:	br	gp,2f
+2:	ldgp	gp,0(gp)
+	jmp	__syscall_error
+
+END(__syscall_rt_sigaction)
+
+	.align	5
+	.ent	sigreturn
+sigreturn:
+	.prologue 0
+	mov	sp,a0
+	ldi	v0,__NR_sigreturn
+	callsys
+	.end	sigreturn
+
+	.align	4
+	.ent	rt_sigreturn
+rt_sigreturn:
+	.prologue 0
+	mov	sp,a0
+	ldi	v0,__NR_rt_sigreturn
+	callsys
+	.end	rt_sigreturn
diff --git a/sysdeps/unix/sysv/linux/alpha/sys/ucontext.h b/sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
new file mode 100644
index 0000000000..349dd1e2a2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
@@ -0,0 +1,41 @@
+/* Copyright (C) 1998 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.  */
+
+#ifndef _SYS_UCONTEXT_H
+#define _SYS_UCONTEXT_H	1
+
+#include <features.h>
+#include <signal.h>
+
+#include <bits/sigcontext.h>
+
+/* A machine context is exactly a sigcontext.  */
+typedef struct sigcontext mcontext_t;
+
+/* Userlevel context.  */
+typedef struct ucontext
+  {
+    unsigned long int uc_flags;
+    struct ucontext *uc_links;
+    unsigned long __uc_osf_sigmask;
+    stack_t uc_stack;
+    mcontext_t uc_mcontext;
+    __sigset_t uc_sigmask;
+  } ucontext_t;
+
+#endif /* sys/ucontext.h */
diff --git a/sysdeps/unix/sysv/linux/alpha/syscalls.list b/sysdeps/unix/sysv/linux/alpha/syscalls.list
index 9b676185e2..17c55f0991 100644
--- a/sysdeps/unix/sysv/linux/alpha/syscalls.list
+++ b/sysdeps/unix/sysv/linux/alpha/syscalls.list
@@ -16,7 +16,6 @@ semget		-	semget		3	__semget	semget
 semctl		-	semctl		4	__semctl	semctl
 
 osf_sigprocmask	-	osf_sigprocmask	2	__osf_sigprocmask
-s_sigaction	sigaction osf_sigaction	3	__syscall_sigaction
 
 getpeername	-	getpeername	3	__getpeername	getpeername
 getpriority	-	getpriority	2	__getpriority	getpriority