[src/trunk]: src/lib/libc/arch/sparc SIGINFO __sigaction & trampoline code.

[pk <pk%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c338d7eff42e
branches:  trunk
changeset: 553200:c338d7eff42e
user:      pk <pk%NetBSD.org@localhost>
date:      Sun Oct 12 14:42:03 2003 +0000

description:
SIGINFO __sigaction & trampoline code.

diffstat:

 lib/libc/arch/sparc/Makefile.inc                 |   4 +-
 lib/libc/arch/sparc/sys/__sigaction14_sigtramp.c |  25 +++++++--
 lib/libc/arch/sparc/sys/__sigtramp2.S            |  59 ++++++++++++++++++++++++
 3 files changed, 80 insertions(+), 8 deletions(-)

diffs (128 lines):

diff -r 02ff5f15372f -r c338d7eff42e lib/libc/arch/sparc/Makefile.inc
--- a/lib/libc/arch/sparc/Makefile.inc  Sun Oct 12 14:36:19 2003 +0000
+++ b/lib/libc/arch/sparc/Makefile.inc  Sun Oct 12 14:42:03 2003 +0000
@@ -1,11 +1,11 @@
-#      $NetBSD: Makefile.inc,v 1.8 2002/10/27 18:45:11 chs Exp $
+#      $NetBSD: Makefile.inc,v 1.9 2003/10/12 14:42:03 pk Exp $
 
 KMINCLUDES= arch/sparc/SYS.h
 KMSRCS=        bzero.S ffs.S strlen.S htonl.S htons.S \
        ntohl.S ntohs.S divrem.m4 \
        mul.S saveregs.S umul.S
 
-SRCS+= __sigaction14_sigtramp.c __sigtramp1.S
+SRCS+= __sigaction14_sigtramp.c __sigtramp1.S __sigtramp2.S
 
 # `source' files built from m4 source
 # the name `div.o' is taken for the ANSI C `div' function, hence sdiv here
diff -r 02ff5f15372f -r c338d7eff42e lib/libc/arch/sparc/sys/__sigaction14_sigtramp.c
--- a/lib/libc/arch/sparc/sys/__sigaction14_sigtramp.c  Sun Oct 12 14:36:19 2003 +0000
+++ b/lib/libc/arch/sparc/sys/__sigaction14_sigtramp.c  Sun Oct 12 14:42:03 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: __sigaction14_sigtramp.c,v 1.2 2003/01/18 11:15:08 thorpej Exp $       */
+/*     $NetBSD: __sigaction14_sigtramp.c,v 1.3 2003/10/12 14:42:03 pk Exp $    */
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -40,6 +40,7 @@
 
 #include <sys/types.h>
 #include <signal.h>
+#include <errno.h>
 
 #include "extern.h"
 
@@ -48,13 +49,25 @@
 int
 __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
 {
-       extern int __sigtramp_sigcontext_1[];
+       int rv;
+       extern void __sigtramp_sigcontext_1(void);
+       extern void __sigtramp_siginfo_2(void);
 
        /*
-        * Right here we should select the SA_SIGINFO trampoline
-        * if SA_SIGINFO is set in the sigaction.
+        * We select the compatibility SIGCONTEXT trampoline if SA_SIGINFO
+        * is not set in the sigaction.
         */
+       if (act && (act->sa_flags & SA_SIGINFO) == 0) {
+               rv =  __sigaction_sigtramp(sig, act, oact,
+                                          __sigtramp_sigcontext_1, 1);
+               /*
+                * EINVAL might indicate that trampoline version 1 is
+                * not supported by the kernel; fall back on native
+                * SIGINFO trampoline.
+                */
+               if (rv >= 0 || errno != EINVAL)
+                       return rv;
+       }
 
-       return (__sigaction_sigtramp(sig, act, oact,
-                                    __sigtramp_sigcontext_1, 1));
+       return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
 }
diff -r 02ff5f15372f -r c338d7eff42e lib/libc/arch/sparc/sys/__sigtramp2.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/sparc/sys/__sigtramp2.S     Sun Oct 12 14:42:03 2003 +0000
@@ -0,0 +1,59 @@
+/*     $NetBSD: __sigtramp2.S,v 1.1 2003/10/12 14:42:03 pk Exp $       */
+
+/*-
+ * Copyright (c) 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Paul Kranenburg.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/asm.h>
+#if defined(SYSLIBC_SCCS) && !defined(lint)
+       RCSID("$NetBSD: __sigtramp2.S,v 1.1 2003/10/12 14:42:03 pk Exp $")
+#endif /* SYSLIBC_SCCS and not lint */
+
+#include "SYS.h"
+
+/*
+ * When this code is run, the stack looks like:
+ *     [%sp]                   struct frame
+ *     [%sp + 96]              siginfo_t
+ *     [%sp + 96 + 128]        ucontext_t
+ *         .
+ *         .
+ */
+ENTRY_NOPROFILE(__sigtramp_siginfo_2)
+       add     %sp, 96 + 128, %o0      /* get pointer to ucontext */
+       mov     SYS_setcontext, %g1
+       t       ST_SYSCALL              /* call setcontext */
+       mov     SYS_exit, %g1           /* exit with errno */
+       t       ST_SYSCALL              /* if sigreturn fails */