highperfocused/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Compile x86/swscale_template with -mno-red-zone.

Browse Source 
Replaces a very hackish hack to fix the same issue (call instruction
overwriting stack variables).

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
(cherry picked from commit 424bcc46b5fb0d662e0fb9ad6319c5b9ef3d770f)
This commit is contained in:
Reimar Döffinger 2011-09-21 19:10:58 +02:00 committed by Michael Niedermayer
parent 6109974cd9
commit 02affe2f0e
3 changed files with 7 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
configure vendored
View File

@ -3073,6 +3073,10 @@ else
fi
check_cflags -fno-math-errno
check_cflags -fno-signed-zeros
check_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
int x;
EOF
if enabled icc; then
# Just warnings, no remarks
@ -3383,6 +3387,7 @@ SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}
SLIB_INSTALL_EXTRA_CMD=${SLIB_INSTALL_EXTRA_CMD}
SLIB_UNINSTALL_EXTRA_CMD=${SLIB_UNINSTALL_EXTRA_CMD}
SAMPLES:=${samples:-\$(FATE_SAMPLES)}
NOREDZONE_FLAGS=$noredzone_flags
EOF
get_version(){

2
libswscale/Makefile
View File

@ -20,6 +20,8 @@ OBJS-$(HAVE_MMX) += x86/rgb2rgb.o \
x86/yuv2rgb_mmx.o
OBJS-$(HAVE_VIS) += sparc/yuv2rgb_vis.o
$(SUBDIR)x86/swscale_mmx.o: CFLAGS += $(NOREDZONE_FLAGS)
TESTPROGS = colorspace swscale
DIRS = bfin mlib ppc sparc x86

10
libswscale/x86/swscale_template.c
View File

@ -2240,10 +2240,6 @@ static void RENAME(hyscale_fast)(SwsContext *c, int16_t *dst,
#if defined(PIC)
DECLARE_ALIGNED(8, uint64_t, ebxsave);
#endif
// HACK: gcc 4.6 no longer decrements esp,
// use this to make it reserve space for the call
// return address
void *dummy;
__asm__ volatile(
#if defined(PIC)
@ -2295,7 +2291,6 @@ static void RENAME(hyscale_fast)(SwsContext *c, int16_t *dst,
#if defined(PIC)
,"m" (ebxsave)
#endif
,"m" (dummy)
: "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D
#if !defined(PIC)
,"%"REG_b
@ -2317,10 +2312,6 @@ static void RENAME(hcscale_fast)(SwsContext *c, int16_t *dst1, int16_t *dst2,
#if defined(PIC)
DECLARE_ALIGNED(8, uint64_t, ebxsave);
#endif
// HACK: gcc 4.6 no longer decrements esp,
// use this to make it reserve space for the call
// return address
void *dummy;
__asm__ volatile(
#if defined(PIC)
@ -2360,7 +2351,6 @@ static void RENAME(hcscale_fast)(SwsContext *c, int16_t *dst1, int16_t *dst2,
#if defined(PIC)
,"m" (ebxsave)
#endif
,"m" (dummy)
: "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D
#if !defined(PIC)
,"%"REG_b