Module Name: src
Committed By: uwe
Date: Sat Jan 28 12:21:14 UTC 2012
Modified Files:
src/lib/csu/arch/sh3: crt0.S
Log Message:
Asm cosmetic. Add a comment that explains what this trampoline does.
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/lib/csu/arch/sh3/crt0.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/csu/arch/sh3/crt0.S
diff -u src/lib/csu/arch/sh3/crt0.S:1.1 src/lib/csu/arch/sh3/crt0.S:1.2
--- src/lib/csu/arch/sh3/crt0.S:1.1 Sat Aug 7 18:01:34 2010
+++ src/lib/csu/arch/sh3/crt0.S Sat Jan 28 12:21:13 2012
@@ -1,4 +1,4 @@
-/* $NetBSD: crt0.S,v 1.1 2010/08/07 18:01:34 joerg Exp $ */
+/* $NetBSD: crt0.S,v 1.2 2012/01/28 12:21:13 uwe Exp $ */
/*
* Copyright (c) 1998 Christos Zoulas
@@ -37,11 +37,17 @@
#include <machine/asm.h>
-RCSID("$NetBSD: crt0.S,v 1.1 2010/08/07 18:01:34 joerg Exp $")
+RCSID("$NetBSD: crt0.S,v 1.2 2012/01/28 12:21:13 uwe Exp $")
STRONG_ALIAS(_start,__start)
+/*
+ * Kernel setregs() passes all arguments in registers to avoid
+ * copyout. This trampoline pushes 5th and 6th arguments into stack,
+ * where C ABI expects them to be, and calls the real startup code
+ * written in C.
+ */
_ENTRY(__start)
- mov.l r9,@-r15
- bra ___start
- mov.l r8,@-r15
+ mov.l r9, @-sp
+ bra ___start
+ mov.l r8, @-sp
