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Commit a52312b8 authored by David S. Miller's avatar David S. Miller
Browse files

sparc32: Correct the return value of memcpy. 



Properly return the original destination buffer pointer.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Tested-by: default avatarKjetil Oftedal <oftedal@gmail.com>
parent 21f74d36

arch/sparc/lib/memcpy.S

+7 −15
Original line number Diff line number Diff line
@@ -13,14 +13,6 @@ 
	.align	4;		\

x:





/* In kernel these functions don't return a value.

 * One should use macros in asm/string.h for that purpose.

 * We return 0, so that bugs are more apparent.

 */

#define SETUP_RETL

#define RETL_INSN	clr	%o0



/* Both these macros have to start with exactly the same insn */

#define MOVE_BIGCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \

	ldd	[%src + (offset) + 0x00], %t0; \
@@ -154,7 +146,7 @@ FUNC(__memmove) 
#endif

FUNC(memmove)

	cmp		%o0, %o1

	SETUP_RETL

	mov		%o0, %g7

	bleu		9f

	 sub		%o0, %o1, %o4
@@ -178,7 +170,7 @@ FUNC(memmove) 
	 sub		%o0, 1, %o0



	retl

	 RETL_INSN

	 mov		%g7, %o0



/* NOTE: This code is executed just for the cases,

         where %src (=%o1) & 3 is != 0.
@@ -212,7 +204,7 @@ FUNC(memmove) 
FUNC(memcpy)	/* %o0=dst %o1=src %o2=len */



	sub		%o0, %o1, %o4

	SETUP_RETL

	mov		%o0, %g7

9:

	andcc		%o4, 3, %o5

0:
@@ -308,7 +300,7 @@ FUNC(memcpy) /* %o0=dst %o1=src %o2=len */ 
	stb		%g2, [%o0]

1:

	retl

 	 RETL_INSN

	 mov		%g7, %o0



82:	/* ldd_std */

	MOVE_BIGALIGNCHUNK(o1, o0, 0x00, o2, o3, o4, o5, g2, g3, g4, g5)
@@ -373,7 +365,7 @@ FUNC(memcpy) /* %o0=dst %o1=src %o2=len */ 
	stb		%g2, [%o0]

1:

	retl

 	 RETL_INSN

	 mov		%g7, %o0



86:	/* non_aligned */

	cmp		%o2, 6
@@ -498,7 +490,7 @@ FUNC(memcpy) /* %o0=dst %o1=src %o2=len */ 
	stb		%g2, [%i0 + 4]

1:

	ret

	 restore	%g0, %g0, %o0

	 restore	%g7, %g0, %o0



88:	/* short_end */
@@ -529,7 +521,7 @@ FUNC(memcpy) /* %o0=dst %o1=src %o2=len */ 
	stb		%g2, [%o0]

1:

	retl

 	 RETL_INSN

	 mov		%g7, %o0



90:	/* short_aligned_end */

	bne		88b