From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 4 Feb 2004 08:25:19 +0000 (+0000)
Subject: Don't use register ebx - it's GOT pointer for -fPIC libraries
X-Git-Tag: v1.0.3~26
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=75190c6ed22c236f91bfbeb11ed2b72c3846d689;p=alsa-lib.git

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 e104d2e0..bd4a358d 100644
--- 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"
 	);
 }
-