[src/nathanw_sa]: src/sys/arch/powerpc/powerpc Integrated security review for...

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

details:   https://anonhg.NetBSD.org/src/rev/bfc133ee89da
branches:  nathanw_sa
changeset: 504619:bfc133ee89da
user:      manu <manu%NetBSD.org@localhost>
date:      Wed Apr 11 19:41:03 2001 +0000

description:
Integrated security review for signal delivery by Wolfgang Solfrank

diffstat:

 sys/arch/powerpc/powerpc/linux_sigcode.S |  70 ++++++++++++++++++++++++++++++++
 1 files changed, 70 insertions(+), 0 deletions(-)

diffs (74 lines):

diff -r 48bad15b60ed -r bfc133ee89da sys/arch/powerpc/powerpc/linux_sigcode.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/powerpc/powerpc/linux_sigcode.S  Wed Apr 11 19:41:03 2001 +0000
@@ -0,0 +1,70 @@
+/*     $NetBSD: linux_sigcode.S,v 1.2.8.2 2001/04/11 19:41:03 manu Exp $ */
+
+/*
+ * Copyright (C) 1995, 1996 Wolfgang Solfrank.
+ * Copyright (C) 1995, 1996 TooLs GmbH.
+ * 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 TooLs GmbH.
+ * 4. The name of TooLs GmbH may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
+ */
+
+/*
+ * The following code is just a copy from sys/arch/powerpc/powerpc/sigcode.S 
+ * Obviously, there are little chance that it works for Linux emulation, so 
+ * it will have to be rewritten. 
+ * Emmanuel Dreyfus <p99dreyf%criens.u-psud.fr@localhost>
+ */
+
+#include <machine/asm.h>
+
+#include <compat/linux/linux_syscall.h>
+
+/*
+ * This is copied from sys/compat/linux/arch/powerpc/linux_machdep.h
+ */
+#define LINUX__SIGNAL_FRAMESIZE 64
+
+/*
+ * The following code gets copied to the top of the user stack on process
+ * execution.  It does signal trampolining on signal delivery.
+ *
+ * On entry r1 points to a struct sigframe at bottom of current stack.
+ * All other registers are unchanged.
+ * 
+ * XXX Linux just does this: 
+ *  0x38007777   li r0,0x7777
+ *  0x44000002   sc
+ */
+       .globl  _C_LABEL(linux_sigcode),_C_LABEL(linux_esigcode)
+_C_LABEL(linux_sigcode):
+       addi    1,1,-16                 /* reserved space for callee */
+       blrl
+       addi    3,1,16+LINUX__SIGNAL_FRAMESIZE  /* compute &sf_sc */
+       li      0,LINUX_SYS_sigreturn
+       sc                              /* linux_sys_sigreturn(scp) */
+       li      0,LINUX_SYS_exit
+       sc                              /* linux_sys_exit(errno) */
+_C_LABEL(linux_esigcode):