[src/netbsd-9]: src/lib/libc/arch/hppa/sys Pull up following revision(s) (req...

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

details:   https://anonhg.NetBSD.org/src/rev/1c2a0913e704
branches:  netbsd-9
changeset: 366672:1c2a0913e704
user:      martin <martin%NetBSD.org@localhost>
date:      Mon Jun 06 11:31:13 2022 +0000

description:
Pull up following revision(s) (requested by skrll in ticket #1464):

        lib/libc/arch/hppa/sys/ptrace.S: revision 1.8

Save and restore %r19 the "linkage table pointer register" across the call
to __cerror so if the ptrace syscall fails we can call __cerror again with
the correct %r19 value.

Do this even though the call of __cerror doesn't go via the PLT because
__cerror calls __errno which does.

Analysis and fix from Tom Lane in
PR port-hppa/56864: hppa: ptrace(2) dumps core when returning an error

I changed the location of where %r19 is stored on the stack to follow the
ABI.

diffstat:

 lib/libc/arch/hppa/sys/ptrace.S |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r 93617ee0b6e4 -r 1c2a0913e704 lib/libc/arch/hppa/sys/ptrace.S
--- a/lib/libc/arch/hppa/sys/ptrace.S   Mon Jun 06 03:08:35 2022 +0000
+++ b/lib/libc/arch/hppa/sys/ptrace.S   Mon Jun 06 11:31:13 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ptrace.S,v 1.6 2008/04/28 20:22:56 martin Exp $        */
+/*     $NetBSD: ptrace.S,v 1.6.66.1 2022/06/06 11:31:13 martin Exp $   */
 
 /*-
  * Copyright (c) 2001 The NetBSD Foundation, Inc.
@@ -44,10 +44,12 @@
        stw     %arg1, HPPA_FRAME_ARG(1)(%sp)
        stw     %arg2, HPPA_FRAME_ARG(2)(%sp)
        stw     %arg3, HPPA_FRAME_ARG(3)(%sp)
+       stw     %r19, HPPA_FRAME_EDP(%sp)
        ldo     HPPA_FRAME_SIZE(%sp),%sp
        bl      __cerror, %rp
         copy   %r0, %t1
        ldo     -HPPA_FRAME_SIZE(%sp), %sp
+       ldw     HPPA_FRAME_EDP(%sp), %r19
        ldw     HPPA_FRAME_ARG(0)(%sp), %arg0
        ldw     HPPA_FRAME_ARG(1)(%sp), %arg1
        ldw     HPPA_FRAME_ARG(2)(%sp), %arg2