[src/trunk]: src/lib/libc/arch/powerpc/sys For consistency with all other por...

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

details:   https://anonhg.NetBSD.org/src/rev/0801dff804bf
branches:  trunk
changeset: 482857:0801dff804bf
user:      kleink <kleink%NetBSD.org@localhost>
date:      Wed Feb 23 20:16:57 2000 +0000

description:
For consistency with all other ports, clear errno in the prologue to the
syscall here as well - while the manual page advises applications to clear
errno themselves their actual behaviour may be questionable, especially in
light of the other ports' implementations.

diffstat:

 lib/libc/arch/powerpc/sys/ptrace.S |  45 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 43 insertions(+), 2 deletions(-)

diffs (52 lines):

diff -r 949a3b8c74b7 -r 0801dff804bf lib/libc/arch/powerpc/sys/ptrace.S
--- a/lib/libc/arch/powerpc/sys/ptrace.S        Wed Feb 23 18:50:51 2000 +0000
+++ b/lib/libc/arch/powerpc/sys/ptrace.S        Wed Feb 23 20:16:57 2000 +0000
@@ -1,5 +1,46 @@
-/*     $NetBSD: ptrace.S,v 1.2 1998/05/25 15:28:03 ws Exp $    */
+/*     $NetBSD: ptrace.S,v 1.3 2000/02/23 20:16:57 kleink Exp $        */
 
 #include "SYS.h"
 
-RSYSCALL(ptrace)
+ENTRY(ptrace)
+#ifdef _REENTRANT
+       mflr    0
+       stwu    1,-32(1)
+       stw     0,36(1)
+       stw     3,8(1)
+       stw     4,12(1)
+       stw     5,16(1)
+       stw     6,20(1)
+
+       bl      PIC_PLT(_C_LABEL(__errno))
+       li      7,0
+       stw     7,0(3)
+
+       lwz     3,8(1)
+       lwz     4,12(1)
+       lwz     5,16(1)
+       lwz     0,36(1)
+       lwz     6,20(1)
+       mtlr    0
+       la      1,32(1)
+#else
+#ifdef PIC
+       mflr    0
+       bl      _GLOBAL_OFFSET_TABLE_@local-4
+       mflr    7
+       lwz     7,_C_LABEL(errno)@got(7)
+       li      8,0
+       stw     8,0(7)
+       mtlr    0
+#else
+       lis     7,_C_LABEL(errno)@ha
+       li      8,0
+       stw     8,_C_LABEL(errno)@l(7)
+#endif /* PIC */
+#endif /* _REENTRANT */
+       li      0,SYS_ptrace
+       sc
+       bso     1f
+       blr
+1:
+       b       PIC_PLT(_C_LABEL(__cerror))