[src/trunk]: src/lib/libc/arch/mips/sys Since N32/N64 pass the first 8 argume...

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

details:   https://anonhg.NetBSD.org/src/rev/a1f1d7001dca
branches:  trunk
changeset: 326495:a1f1d7001dca
user:      matt <matt%NetBSD.org@localhost>
date:      Fri Jan 31 18:06:26 2014 +0000

description:
Since N32/N64 pass the first 8 arguments in registers, we can load all
the arguments into those registers before invoking the syscall having
the kernel syscall handler from having to do that.

diffstat:

 lib/libc/arch/mips/sys/__syscall.S |  24 +++++++++++++++++++++++-
 lib/libc/arch/mips/sys/syscall.S   |   6 ++++--
 2 files changed, 27 insertions(+), 3 deletions(-)

diffs (53 lines):

diff -r 1676319acbad -r a1f1d7001dca lib/libc/arch/mips/sys/__syscall.S
--- a/lib/libc/arch/mips/sys/__syscall.S        Fri Jan 31 15:43:06 2014 +0000
+++ b/lib/libc/arch/mips/sys/__syscall.S        Fri Jan 31 18:06:26 2014 +0000
@@ -1,5 +1,27 @@
-/*     $NetBSD: __syscall.S,v 1.1 2000/12/13 23:18:40 simonb Exp $     */
+/*     $NetBSD: __syscall.S,v 1.2 2014/01/31 18:06:26 matt Exp $       */
 
 #include "SYS.h"
 
+#ifdef __mips_o32
 RSYSCALL(__syscall)
+#else
+
+LEAF(__syscall)
+        PIC_PROLOGUE(__syscall)
+       move    v0, a0
+       move    a0, a1
+       move    a1, a2
+       move    a2, a3
+       move    a3, a4
+       move    a4, a5
+       move    a5, a6
+       move    a6, a7
+       REG_L   a7, (sp)
+        SYSTRAP(__syscall)
+        bne a3,zero,1f
+        PIC_RETURN()
+1:
+        PIC_TAILCALL(__cerror)
+END(__syscall)
+STRONG_ALIAS(syscall, __syscall)
+#endif
diff -r 1676319acbad -r a1f1d7001dca lib/libc/arch/mips/sys/syscall.S
--- a/lib/libc/arch/mips/sys/syscall.S  Fri Jan 31 15:43:06 2014 +0000
+++ b/lib/libc/arch/mips/sys/syscall.S  Fri Jan 31 18:06:26 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: syscall.S,v 1.6 2009/12/14 01:07:42 matt Exp $ */
+/*     $NetBSD: syscall.S,v 1.7 2014/01/31 18:06:26 matt Exp $ */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -38,8 +38,10 @@
 #if 0
        RCSID("from: @(#)syscall.s      8.1 (Berkeley) 6/4/93")
 #else
-       RCSID("$NetBSD: syscall.S,v 1.6 2009/12/14 01:07:42 matt Exp $")
+       RCSID("$NetBSD: syscall.S,v 1.7 2014/01/31 18:06:26 matt Exp $")
 #endif
 #endif /* LIBC_SCCS and not lint */
 
+#ifdef __mips_o32
 RSYSCALL(syscall)
+#endif