[patch] fix the diff_MMX in vf_decimate.c for hardened

vf_decimate_PIC.patch (text/plain), 996 bytes, created by Alexandre Carsac on 2007-05-05 15:39:14 UTC

--- vf_decimate.c.org	2007-05-05 00:12:07.000000000 +0000
+++ vf_decimate.c	2007-05-05 17:21:20.000000000 +0000
@@ -24,7 +24,8 @@
 {
 	volatile short out[4];
 	asm (
-		"movl $8, %%ecx \n\t"
+	        "push %%ebx \n\t"
+		"mov $8, %%ebx \n\t"
 		"pxor %%mm4, %%mm4 \n\t"
 		"pxor %%mm7, %%mm7 \n\t"
 		
@@ -35,7 +36,7 @@
 		"movq (%%"REG_S"), %%mm2 \n\t"
 		"add %%"REG_a", %%"REG_S" \n\t"
 		"movq (%%"REG_D"), %%mm1 \n\t"
-		"add %%"REG_b", %%"REG_D" \n\t"
+		"add %%"REG_c", %%"REG_D" \n\t"
 		"psubusb %%mm1, %%mm2 \n\t"
 		"psubusb %%mm0, %%mm1 \n\t"
 		"movq %%mm2, %%mm0 \n\t"
@@ -49,12 +50,13 @@
 		"paddw %%mm2, %%mm4 \n\t"
 		"paddw %%mm3, %%mm4 \n\t"
 		
-		"decl %%ecx \n\t"
+		"decl %%ebx \n\t"
 		"jnz 1b \n\t"
 		"movq %%mm4, (%%"REG_d") \n\t"
 		"emms \n\t"
+		"pop %%ebx \n\t"
 		: 
-		: "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
+		: "S" (old), "D" (new), "a" ((long)os), "c" ((long)ns), "d" (out)
 		: "memory"
 		);
 	return out[0]+out[1]+out[2]+out[3];