[v3] linux-user: Fix register used for 6th and 7th syscall argument on aarch64

[Qemu-devel] [PATCH v3] linux-user: Fix register used for 6th and 7th syscall argument on aarch64

Guido Günther posted 1 patch 6 years, 2 months ago

Diff against v1
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linux-user/host/aarch64/safe-syscall.inc.S | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

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[Qemu-devel] [PATCH v3] linux-user: Fix register used for 6th and 7th syscall argument on aarch64

Posted by Guido Günther 6 years, 2 months ago

This unbreaks the testcase from

    http://lists.nongnu.org/archive/html/qemu-arm/2018-01/msg00514.html

Thanks to Laurent Vivier for spotting the 7th one.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Suggested-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
v3 collects *-by: replies. Anything else I can do to get this applied?

 linux-user/host/aarch64/safe-syscall.inc.S | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/linux-user/host/aarch64/safe-syscall.inc.S b/linux-user/host/aarch64/safe-syscall.inc.S
index 58a2329b37..bc1f5a9792 100644
--- a/linux-user/host/aarch64/safe-syscall.inc.S
+++ b/linux-user/host/aarch64/safe-syscall.inc.S
@@ -36,7 +36,7 @@ safe_syscall_base:
 	 *               and return the result in x0
 	 * and the syscall instruction needs
 	 *               x8 == syscall number
-	 *               x0 ... x7 == syscall arguments
+	 *               x0 ... x6 == syscall arguments
 	 *               and returns the result in x0
 	 * Shuffle everything around appropriately.
 	 */
@@ -47,8 +47,8 @@ safe_syscall_base:
 	mov	x2, x4
 	mov	x3, x5
 	mov	x4, x6
-	mov	x6, x7
-	ldr	x7, [sp]
+	mov	x5, x7
+	ldr	x6, [sp]
 
 	/* This next sequence of code works in conjunction with the
 	 * rewind_if_safe_syscall_function(). If a signal is taken
-- 
2.15.1

Re: [Qemu-devel] [PATCH v3] linux-user: Fix register used for 6th and 7th syscall argument on aarch64

Posted by Laurent Vivier 6 years, 2 months ago

Le 02/02/2018 à 11:02, Guido Günther a écrit :
> This unbreaks the testcase from
> 
>     http://lists.nongnu.org/archive/html/qemu-arm/2018-01/msg00514.html
> 
> Thanks to Laurent Vivier for spotting the 7th one.
> 
> Signed-off-by: Guido Günther <agx@sigxcpu.org>
> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Suggested-by: Laurent Vivier <laurent@vivier.eu>
> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v3 collects *-by: replies. Anything else I can do to get this applied?
> 
>  linux-user/host/aarch64/safe-syscall.inc.S | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Applied to my 'linux-user-for-2.12' branch.

Thanks,
Laurent