[src/trunk]: src/lib/libc/compat/arch/hppa/sys Put back the sigcontext sigtra...

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

details:   https://anonhg.NetBSD.org/src/rev/21b45f330b32
branches:  trunk
changeset: 990597:21b45f330b32
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Oct 30 21:39:28 2021 +0000

description:
Put back the sigcontext sigtramp code.

diffstat:

 lib/libc/compat/arch/hppa/sys/Makefile.inc         |    4 +-
 lib/libc/compat/arch/hppa/sys/compat___sigtramp1.S |  112 +++++++++++++++++++++
 2 files changed, 114 insertions(+), 2 deletions(-)

diffs (128 lines):

diff -r bdeff6585ed7 -r 21b45f330b32 lib/libc/compat/arch/hppa/sys/Makefile.inc
--- a/lib/libc/compat/arch/hppa/sys/Makefile.inc        Sat Oct 30 21:08:58 2021 +0000
+++ b/lib/libc/compat/arch/hppa/sys/Makefile.inc        Sat Oct 30 21:39:28 2021 +0000
@@ -1,6 +1,6 @@
-#      $NetBSD: Makefile.inc,v 1.2 2011/03/06 17:08:13 bouyer Exp $
+#      $NetBSD: Makefile.inc,v 1.3 2021/10/30 21:39:28 christos Exp $
 
 SRCS+=compat_Ovfork.S compat___semctl.S compat___sigreturn14.S \
     compat_msgctl.S compat_shmctl.S compat_sigaction.S \
     compat_sigpending.S compat_sigprocmask.S compat_sigreturn.S \
-    compat_sigsuspend.S compat_quotactl.S
+    compat_sigsuspend.S compat_quotactl.S compat___sigtramp1.S
diff -r bdeff6585ed7 -r 21b45f330b32 lib/libc/compat/arch/hppa/sys/compat___sigtramp1.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/compat/arch/hppa/sys/compat___sigtramp1.S        Sat Oct 30 21:39:28 2021 +0000
@@ -0,0 +1,112 @@
+/*     $NetBSD: compat___sigtramp1.S,v 1.1 2021/10/30 21:39:28 christos Exp $  */
+
+/*
+ * Copyright (c) 1998-2001 Michael Shalayeff
+ * All rights reserved.
+ *
+ * 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 Michael Shalayeff.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR HIS RELATIVES 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 MIND, 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.
+ *
+ * Portitions of this file are derived from other sources, see
+ * the copyrights and acknowledgements below.
+ */
+/*
+ * Copyright (c) 1990,1991,1992,1994 The University of Utah and
+ * the Computer Systems Laboratory (CSL).  All rights reserved.
+ *
+ * THE UNIVERSITY OF UTAH AND CSL PROVIDE THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION, AND DISCLAIM ANY LIABILITY OF ANY KIND FOR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM ITS USE.
+ *
+ * CSL requests users of this software to return to csl-dist%cs.utah.edu@localhost any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *     Utah $Hdr: locore.s 1.62 94/12/15$
+ */
+/*
+ *  (c) Copyright 1988 HEWLETT-PACKARD COMPANY
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *  for any purpose is hereby granted without fee, provided that
+ *  the above copyright notice and this notice appears in all
+ *  copies, and that the name of Hewlett-Packard Company not be
+ *  used in advertising or publicity pertaining to distribution
+ *  of the software without specific, written prior permission.
+ *  Hewlett-Packard Company makes no representations about the
+ *  suitability of this software for any purpose.
+ */
+
+#include "SYS.h"
+
+ENTRY_NOPROFILE(__sigtramp_sigcontext_1,0)
+       .call
+       /*
+        * Our sendsig() places the address of the signal handler 
+        * in %arg3.  It may actually be a PLABEL.
+        */
+       bb,>=,n %arg3, 30, L$sigcode_bounce     ; branch if not a PLABEL
+       depi    0, 31, 2, %arg3                 ; zero L bit in PLABEL pointer
+       ldw     4(%arg3), %r19                  ; load shared library linkage
+       ldw     0(%arg3), %arg3                 ; load real catcher address
+L$sigcode_bounce:
+       /*
+        * This blr puts the address of the following nop in rp.
+        * It also schedules the nop for execution, which is why
+        * that instruction has to be a nop, or, rather, not any
+        * instruction only meant to execute once the signal handler 
+        * returns.
+        */
+       blr     %r0, %rp
+       /*
+        * This bv schedules the instruction pointed to by arg3
+        * for execution.  So, arg3 is the address of the signal
+        * handler.
+        */
+       bv,n    %r0(%arg3)
+       nop
+       /*
+        * The signal handler has returned.  Since r3 is on the list
+        * of callee-saved registers, it's whatever the sendsig
+        * code wanted it set to.  Since we copy it into arg0, 
+        * it looks like sendsig leaves r3 holding the desired
+        * single argument to sys___sigreturn14, i.e., the
+        * struct sigcontext *.
+        */
+       /* Make a SYS___sigreturn14 system call. */
+       copy    %r3, %arg0
+       ldil    L%SYSCALLGATE, %r1
+       .call
+       ble     4(%sr7, %r1)
+       ldi     SYS_compat_16___sigreturn14, %t1
+       /* Make a SYS_exit system call. */
+       copy    %ret0, %arg0
+       ldil    L%SYSCALLGATE, %r1
+       .call
+       ble     4(%sr7, %r1)
+       ldi     SYS_exit, %t1
+EXIT(__sigtramp_sigcontext_1)