9os

commit a6f9da76612823c4485096afb15c319845fd5740
parent 53ac88c0ea18708197a378ce6f94bd2e95347f33
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Fri, 18 Sep 2020 15:24:00 +0200

aarch64: Initialize frame pointer chain

The end of the chain is marked with a 0 and to get
this zero is needed to initialize x29 to zero before
calling the first C function.

Change-Id: Id5f4dd882b49db89ad0ba466b2bd0e8b5894ebc4

Diffstat:
M
src/os9/arch/arm64/crt.s
 | 
1
+

1 file changed, 1 insertion(+), 0 deletions(-)
diff --git a/src/os9/arch/arm64/crt.s b/src/os9/arch/arm64/crt.s
@@ -47,6 +47,7 @@ el1:
 	sub	x2,x2,x0
 	bl	memset
 
+	sub	x29,x29,x29
 	bl	main
 	adr	x0,outsync
 	b	panic