From 2629838162255cc1207a80f8976fbd4e51763a76 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Mon, 13 May 2013 17:23:00 +0100 Subject: [PATCH] xen/arm64: do not clobber callee saved register in early_putch x23 is callee saved in the ARM 64 bit calling convention. Use x15 instead which is a temporary register which need not be preserved. Fixes a random crash during boot. Signed-off-by: Ian Campbell Acked-by: Stefano Stabellini --- xen/arch/arm/arm64/debug.S | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/xen/arch/arm/arm64/debug.S b/xen/arch/arm/arm64/debug.S index f0c77615bd..38b7c74ff7 100644 --- a/xen/arch/arm/arm64/debug.S +++ b/xen/arch/arm/arm64/debug.S @@ -27,9 +27,9 @@ /* Print a character on the UART - this function is called by C * x0: character to print */ early_putch: - ldr x23, =FIXMAP_ADDR(FIXMAP_CONSOLE) - early_uart_ready x23, 1 - early_uart_transmit x23, w0 + ldr x15, =FIXMAP_ADDR(FIXMAP_CONSOLE) + early_uart_ready x15, 1 + early_uart_transmit x15, w0 ret /* -- 2.30.2