diff options
| author | Ian Campbell <ian.campbell@citrix.com> | 2013-05-13 17:23:00 +0100 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-05-14 10:04:14 +0100 |
| commit | 2629838162255cc1207a80f8976fbd4e51763a76 (patch) | |
| tree | 67d6cdf49a6529f2000e7431f419f233e8b044c7 | |
| parent | aa83790810f6ca75b0a26db3aac3d1b904e909bd (diff) | |
| download | xen-2629838162255cc1207a80f8976fbd4e51763a76.tar.gz xen-2629838162255cc1207a80f8976fbd4e51763a76.tar.bz2 xen-2629838162255cc1207a80f8976fbd4e51763a76.zip | |
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 <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| -rw-r--r-- | xen/arch/arm/arm64/debug.S | 6 |
1 files 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 /* |