[src/trunk]: src/sys/arch/usermode/usermode Elaborate return value printing t...

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

details:   https://anonhg.NetBSD.org/src/rev/62629d7e23b1
branches:  trunk
changeset: 771994:62629d7e23b1
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Mon Dec 12 19:59:21 2011 +0000

description:
Elaborate return value printing to include JUSTRETURN etc. instead of
reporting it as an error!

diffstat:

 sys/arch/usermode/usermode/syscall.c |  25 ++++++++++++++++++-------
 1 files changed, 18 insertions(+), 7 deletions(-)

diffs (53 lines):

diff -r cf15ecd2d3ac -r 62629d7e23b1 sys/arch/usermode/usermode/syscall.c
--- a/sys/arch/usermode/usermode/syscall.c      Mon Dec 12 19:57:12 2011 +0000
+++ b/sys/arch/usermode/usermode/syscall.c      Mon Dec 12 19:59:21 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: syscall.c,v 1.16 2011/12/12 15:05:36 reinoud Exp $ */
+/* $NetBSD: syscall.c,v 1.17 2011/12/12 19:59:21 reinoud Exp $ */
 
 /*-
  * Copyright (c) 2007 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.16 2011/12/12 15:05:36 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.17 2011/12/12 19:59:21 reinoud Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -159,7 +159,7 @@
 {
        char **argv, **envp;
 
-//return;
+return;
        if (code != 4) {
                printf("lwp %p, code %3d, nargs %d, argsize %3d\t%s(", 
                        l, code, nargs, argsize, syscallnames[code]);
@@ -217,10 +217,21 @@
 static void
 syscall_retvals_print(lwp_t *l, lwp_t *clwp, int code, int nargs, register_t *args, int error, register_t *rval)
 {
-//return;
+       char const *errstr;
+
+return;
+       switch (error) {
+       case EJUSTRETURN:
+               errstr = "EJUSTRETURN";
+               break;
+       case EAGAIN:
+               errstr = "EGAIN";
+               break;
+       default:
+               errstr = "OK";
+       }
        if (code != 4)
-               printf("=> %s%s: %d, (%"PRIx32", %"PRIx32")\n",
-                       (l != clwp)?"(FORKED) ":"", error?"ERROR":"OK",
-                       error, (uint) (rval[0]), (uint) (rval[1]));
+               printf("=> %s: %d, (%"PRIx32", %"PRIx32")\n",
+                       errstr, error, (uint) (rval[0]), (uint) (rval[1]));
 }