[Mesa-dev] [PATCH 1/2] gallium/util: fix crash with daz detection on x86

[sroland at vmware.com]

From: Roland Scheidegger <sroland at vmware.com>

The code used PIPE_ALIGN_VAR for the variable used by fxsave, however this
does not work if the stack isn't aligned. Hence use PIPE_ALIGN_STACK function
decoration to fix the segfault which can happen if stack alignment is only
4 bytes.
This fixes https://bugs.freedesktop.org/show_bug.cgi?id=87658.

Cc: "10.4" <mesa-stable at lists.freedesktop.org>
---
 src/gallium/auxiliary/util/u_cpu_detect.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c
index 5d9db59..28197f4 100644
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -272,7 +272,7 @@ static INLINE uint64_t xgetbv(void)
 
 
 #if defined(PIPE_ARCH_X86)
-static INLINE boolean sse2_has_daz(void)
+PIPE_ALIGN_STACK static INLINE boolean sse2_has_daz(void)
 {
    struct {
       uint32_t pad1[7];
-- 
1.9.1