Don't use register ebx - it's GOT pointer for -fPIC libraries

diff --git a/src/pcm/pcm_dmix_i386.h b/src/pcm/pcm_dmix_i386.h
index e104d2e05f6a7212c2bf054f7f3f5573074cc455..bd4a358dd0e232f7e46000ced75336d89874220e 100644 (file)
--- a/src/pcm/pcm_dmix_i386.h
+++ b/src/pcm/pcm_dmix_i386.h
@@ -45,6 +45,7 @@ static void MIX_AREAS1(unsigned int size,
        __asm__ __volatile__ (
                "\n"
 
+               "\tpush %%ebx\n"        /* ebx is GOT pointer (-fPIC) */
                /*
                 *  initialization, load ESI, EDI, EBX registers
                 */
@@ -134,13 +135,13 @@ static void MIX_AREAS1(unsigned int size,
                "\tjnz 4b\n"
                "\tdecl %0\n"
                "\tjnz 1b\n"
-               // "\tjmp 6f\n"
                
                "7:"
+               "\tpop %%ebx\n"         /* ebx is GOT pointer (-fPIC) */
 
                : /* no output regs */
                : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
-               : "esi", "edi", "edx", "ecx", "ebx", "eax"
+               : "esi", "edi", "edx", "ecx", "eax"
        );
 }
 
@@ -163,6 +164,7 @@ static void MIX_AREAS1_MMX(unsigned int size,
        __asm__ __volatile__ (
                "\n"
 
+               "\tpush %%ebx\n"        /* ebx is GOT pointer (-fPIC) */
                /*
                 *  initialization, load ESI, EDI, EBX registers
                 */
@@ -219,10 +221,11 @@ static void MIX_AREAS1_MMX(unsigned int size,
                "\tdecl %0\n"
                "\tjnz 1b\n"
                "\temms\n"
+               "\tpop %%ebx\n"         /* ebx is GOT pointer (-fPIC) */
 
                : /* no output regs */
                : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
-               : "esi", "edi", "edx", "ecx", "ebx", "eax"
+               : "esi", "edi", "edx", "ecx", "eax"
        );
 }
 
@@ -245,6 +248,7 @@ static void MIX_AREAS2(unsigned int size,
        __asm__ __volatile__ (
                "\n"
 
+               "\tpush %%ebx\n"        /* ebx is GOT pointer (-fPIC) */
                /*
                 *  initialization, load ESI, EDI, EBX registers
                 */
@@ -323,9 +327,10 @@ static void MIX_AREAS2(unsigned int size,
                "\tjmp 1b\n"
                
                "6:"
+               "\tpop %%ebx\n"         /* ebx is GOT pointer (-fPIC) */
+
                : /* no output regs */
                : "m" (size), "m" (dst), "m" (src), "m" (sum), "m" (dst_step), "m" (src_step), "m" (sum_step)
-               : "esi", "edi", "edx", "ecx", "ebx", "eax"
+               : "esi", "edi", "edx", "ecx", "eax"
        );
 }
-