powerpc: Fix ABIv2 issues with stack offsets in assembly code

Fix STK_PARAM and use it instead of hardcoding ABIv1 offsets.
Signed-off-by: Anton Blanchard <anton@samba.org>

arch/powerpc/include/asm/ppc_asm.h

@@ -189,7 +189,11 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
 #define __STK_REG(i)   (112 + ((i)-14)*8)
 #define STK_REG(i)     __STK_REG(__REG_##i)
 
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+#define __STK_PARAM(i)	(32 + ((i)-3)*8)
+#else
 #define __STK_PARAM(i)	(48 + ((i)-3)*8)
+#endif
 #define STK_PARAM(i)	__STK_PARAM(__REG_##i)
 
 #if defined(_CALL_ELF) && _CALL_ELF == 2

arch/powerpc/lib/copypage_power7.S

@@ -56,15 +56,15 @@ _GLOBAL(copypage_power7)
 
 #ifdef CONFIG_ALTIVEC
 	mflr	r0
-	std	r3,48(r1)
-	std	r4,56(r1)
+	std	r3,STK_PARAM(R3)(r1)
+	std	r4,STK_PARAM(R4)(r1)
 	std	r0,16(r1)
 	stdu	r1,-STACKFRAMESIZE(r1)
 	bl	enter_vmx_copy
 	cmpwi	r3,0
 	ld	r0,STACKFRAMESIZE+16(r1)
-	ld	r3,STACKFRAMESIZE+48(r1)
-	ld	r4,STACKFRAMESIZE+56(r1)
+	ld	r3,STACKFRAMESIZE+STK_PARAM(R3)(r1)
+	ld	r4,STACKFRAMESIZE+STK_PARAM(R4)(r1)
 	mtlr	r0
 
 	li	r0,(PAGE_SIZE/128)

arch/powerpc/lib/copyuser_power7.S

@@ -85,9 +85,9 @@
 .Lexit:
 	addi	r1,r1,STACKFRAMESIZE
 .Ldo_err1:
-	ld	r3,48(r1)
-	ld	r4,56(r1)
-	ld	r5,64(r1)
+	ld	r3,STK_PARAM(R3)(r1)
+	ld	r4,STK_PARAM(R4)(r1)
+	ld	r5,STK_PARAM(R5)(r1)
 	b	__copy_tofrom_user_base
 
 
@@ -96,18 +96,18 @@ _GLOBAL(__copy_tofrom_user_power7)
 	cmpldi	r5,16
 	cmpldi	cr1,r5,4096
 
-	std	r3,48(r1)
-	std	r4,56(r1)
-	std	r5,64(r1)
+	std	r3,STK_PARAM(R3)(r1)
+	std	r4,STK_PARAM(R4)(r1)
+	std	r5,STK_PARAM(R5)(r1)
 
 	blt	.Lshort_copy
 	bgt	cr1,.Lvmx_copy
 #else
 	cmpldi	r5,16
 
-	std	r3,48(r1)
-	std	r4,56(r1)
-	std	r5,64(r1)
+	std	r3,STK_PARAM(R3)(r1)
+	std	r4,STK_PARAM(R4)(r1)
+	std	r5,STK_PARAM(R5)(r1)
 
 	blt	.Lshort_copy
 #endif
@@ -298,9 +298,9 @@ err1;	stb	r0,0(r3)
 	bl	enter_vmx_usercopy
 	cmpwi	cr1,r3,0
 	ld	r0,STACKFRAMESIZE+16(r1)
-	ld	r3,STACKFRAMESIZE+48(r1)
-	ld	r4,STACKFRAMESIZE+56(r1)
-	ld	r5,STACKFRAMESIZE+64(r1)
+	ld	r3,STACKFRAMESIZE+STK_PARAM(R3)(r1)
+	ld	r4,STACKFRAMESIZE+STK_PARAM(R4)(r1)
+	ld	r5,STACKFRAMESIZE+STK_PARAM(R5)(r1)
 	mtlr	r0
 
 	/*

arch/powerpc/lib/memcpy_64.S

@@ -12,7 +12,7 @@
 	.align	7
 _GLOBAL(memcpy)
 BEGIN_FTR_SECTION
-	std	r3,48(r1)	/* save destination pointer for return value */
+	std	r3,STK_PARAM(R3)(r1)	/* save destination pointer for return value */
 FTR_SECTION_ELSE
 #ifndef SELFTEST
 	b	memcpy_power7
@@ -73,7 +73,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 2:	bf	cr7*4+3,3f
 	lbz	r9,8(r4)
 	stb	r9,0(r3)
-3:	ld	r3,48(r1)	/* return dest pointer */
+3:	ld	r3,STK_PARAM(R3)(r1)	/* return dest pointer */
 	blr
 
 .Lsrc_unaligned:
@@ -156,7 +156,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 2:	bf	cr7*4+3,3f
 	rotldi	r9,r9,8
 	stb	r9,0(r3)
-3:	ld	r3,48(r1)	/* return dest pointer */
+3:	ld	r3,STK_PARAM(R3)(r1)	/* return dest pointer */
 	blr
 
 .Ldst_unaligned:
@@ -201,5 +201,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 3:	bf	cr7*4+3,4f
 	lbz	r0,0(r4)
 	stb	r0,0(r3)
-4:	ld	r3,48(r1)	/* return dest pointer */
+4:	ld	r3,STK_PARAM(R3)(r1)	/* return dest pointer */
 	blr

arch/powerpc/lib/memcpy_power7.S

@@ -33,14 +33,14 @@ _GLOBAL(memcpy_power7)
 	cmpldi	r5,16
 	cmpldi	cr1,r5,4096
 
-	std	r3,48(r1)
+	std	r3,STK_PARAM(R1)(r1)
 
 	blt	.Lshort_copy
 	bgt	cr1,.Lvmx_copy
 #else
 	cmpldi	r5,16
 
-	std	r3,48(r1)
+	std	r3,STK_PARAM(R1)(r1)
 
 	blt	.Lshort_copy
 #endif
@@ -216,7 +216,7 @@ _GLOBAL(memcpy_power7)
 	lbz	r0,0(r4)
 	stb	r0,0(r3)
 
-15:	ld	r3,48(r1)
+15:	ld	r3,STK_PARAM(R3)(r1)
 	blr
 
 .Lunwind_stack_nonvmx_copy:
@@ -226,16 +226,16 @@ _GLOBAL(memcpy_power7)
 #ifdef CONFIG_ALTIVEC
 .Lvmx_copy:
 	mflr	r0
-	std	r4,56(r1)
-	std	r5,64(r1)
+	std	r4,STK_PARAM(R4)(r1)
+	std	r5,STK_PARAM(R5)(r1)
 	std	r0,16(r1)
 	stdu	r1,-STACKFRAMESIZE(r1)
 	bl	enter_vmx_copy
 	cmpwi	cr1,r3,0
 	ld	r0,STACKFRAMESIZE+16(r1)
-	ld	r3,STACKFRAMESIZE+48(r1)
-	ld	r4,STACKFRAMESIZE+56(r1)
-	ld	r5,STACKFRAMESIZE+64(r1)
+	ld	r3,STACKFRAMESIZE+STK_PARAM(R3)(r1)
+	ld	r4,STACKFRAMESIZE+STK_PARAM(R4)(r1)
+	ld	r5,STACKFRAMESIZE+STK_PARAM(R5)(r1)
 	mtlr	r0
 
 	/*
@@ -447,7 +447,7 @@ _GLOBAL(memcpy_power7)
 	stb	r0,0(r3)
 
 15:	addi	r1,r1,STACKFRAMESIZE
-	ld	r3,48(r1)
+	ld	r3,STK_PARAM(R3)(r1)
 	b	exit_vmx_copy		/* tail call optimise */
 
 .Lvmx_unaligned_copy:
@@ -651,6 +651,6 @@ _GLOBAL(memcpy_power7)
 	stb	r0,0(r3)
 
 15:	addi	r1,r1,STACKFRAMESIZE
-	ld	r3,48(r1)
+	ld	r3,STK_PARAM(R3)(r1)
 	b	exit_vmx_copy		/* tail call optimise */
 #endif /* CONFiG_ALTIVEC */