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

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

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2011-09-21 19:10:58 +02:00
parent d8289ff9a9
commit 424bcc46b5
3 changed files with 7 additions and 10 deletions
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5
configure vendored
View File

@ -3179,6 +3179,10 @@ else
fi fi
check_cflags -fno-math-errno check_cflags -fno-math-errno
check_cflags -fno-signed-zeros check_cflags -fno-signed-zeros
check_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
int x;
EOF
if enabled icc; then if enabled icc; then
# Just warnings, no remarks # Just warnings, no remarks
@ -3469,6 +3473,7 @@ SLIB_INSTALL_LINKS=${SLIB_INSTALL_LINKS}
SLIB_INSTALL_EXTRA_LIB=${SLIB_INSTALL_EXTRA_LIB} SLIB_INSTALL_EXTRA_LIB=${SLIB_INSTALL_EXTRA_LIB}
SLIB_INSTALL_EXTRA_SHLIB=${SLIB_INSTALL_EXTRA_SHLIB} SLIB_INSTALL_EXTRA_SHLIB=${SLIB_INSTALL_EXTRA_SHLIB}
SAMPLES:=${samples:-\$(FATE_SAMPLES)} SAMPLES:=${samples:-\$(FATE_SAMPLES)}
NOREDZONE_FLAGS=$noredzone_flags
EOF EOF
get_version(){ get_version(){

2
libswscale/Makefile
View File

@ -21,6 +21,8 @@ OBJS-$(HAVE_MMX) += x86/rgb2rgb.o \
OBJS-$(HAVE_VIS) += sparc/yuv2rgb_vis.o OBJS-$(HAVE_VIS) += sparc/yuv2rgb_vis.o
OBJS-$(HAVE_YASM) += x86/scale.o OBJS-$(HAVE_YASM) += x86/scale.o
$(SUBDIR)x86/swscale_mmx.o: CFLAGS += $(NOREDZONE_FLAGS)
TESTPROGS = colorspace swscale TESTPROGS = colorspace swscale
DIRS = bfin mlib ppc sparc x86 DIRS = bfin mlib ppc sparc x86

10
libswscale/x86/swscale_template.c
View File

@ -1963,10 +1963,6 @@ static void RENAME(hyscale_fast)(SwsContext *c, int16_t *dst,
#if defined(PIC) #if defined(PIC)
DECLARE_ALIGNED(8, uint64_t, ebxsave); DECLARE_ALIGNED(8, uint64_t, ebxsave);
#endif #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( __asm__ volatile(
#if defined(PIC) #if defined(PIC)
@ -2018,7 +2014,6 @@ static void RENAME(hyscale_fast)(SwsContext *c, int16_t *dst,
#if defined(PIC) #if defined(PIC)
,"m" (ebxsave) ,"m" (ebxsave)
#endif #endif
,"m" (dummy)
: "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D
#if !defined(PIC) #if !defined(PIC)
,"%"REG_b ,"%"REG_b
@ -2040,10 +2035,6 @@ static void RENAME(hcscale_fast)(SwsContext *c, int16_t *dst1, int16_t *dst2,
#if defined(PIC) #if defined(PIC)
DECLARE_ALIGNED(8, uint64_t, ebxsave); DECLARE_ALIGNED(8, uint64_t, ebxsave);
#endif #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( __asm__ volatile(
#if defined(PIC) #if defined(PIC)
@ -2083,7 +2074,6 @@ static void RENAME(hcscale_fast)(SwsContext *c, int16_t *dst1, int16_t *dst2,
#if defined(PIC) #if defined(PIC)
,"m" (ebxsave) ,"m" (ebxsave)
#endif #endif
,"m" (dummy)
: "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D : "%"REG_a, "%"REG_c, "%"REG_d, "%"REG_S, "%"REG_D
#if !defined(PIC) #if !defined(PIC)
,"%"REG_b ,"%"REG_b