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-rw-r--r--arch/arm/lib/memmove.S28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/lib/memmove.S b/arch/arm/lib/memmove.S
index d1fc0c0c342c..69a9d47fc5ab 100644
--- a/arch/arm/lib/memmove.S
+++ b/arch/arm/lib/memmove.S
@@ -12,6 +12,7 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
+#include <asm/unwind.h>
.text
@@ -27,12 +28,17 @@
*/
ENTRY(memmove)
+ UNWIND( .fnstart )
subs ip, r0, r1
cmphi r2, ip
bls memcpy
stmfd sp!, {r0, r4, lr}
+ UNWIND( .fnend )
+
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} ) @ in first stmfd block
add r1, r1, r2
add r0, r0, r2
subs r2, r2, #4
@@ -45,6 +51,11 @@ ENTRY(memmove)
1: subs r2, r2, #(28)
stmfd sp!, {r5 - r8}
+ UNWIND( .fnend )
+
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} )
+ UNWIND( .save {r5 - r8} ) @ in second stmfd block
blt 5f
CALGN( ands ip, r0, #31 )
@@ -97,6 +108,10 @@ ENTRY(memmove)
CALGN( bcs 2b )
7: ldmfd sp!, {r5 - r8}
+ UNWIND( .fnend ) @ end of second stmfd block
+
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} ) @ still in first stmfd block
8: movs r2, r2, lsl #31
ldrneb r3, [r1, #-1]!
@@ -124,10 +139,13 @@ ENTRY(memmove)
ldr r3, [r1, #0]
beq 17f
blt 18f
+ UNWIND( .fnend )
.macro backward_copy_shift push pull
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} ) @ still in first stmfd block
subs r2, r2, #28
blt 14f
@@ -137,6 +155,11 @@ ENTRY(memmove)
CALGN( bcc 15f )
11: stmfd sp!, {r5 - r9}
+ UNWIND( .fnend )
+
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} )
+ UNWIND( .save {r5 - r9} ) @ in new second stmfd block
PLD( pld [r1, #-4] )
PLD( subs r2, r2, #96 )
@@ -171,6 +194,10 @@ ENTRY(memmove)
PLD( bge 13b )
ldmfd sp!, {r5 - r9}
+ UNWIND( .fnend ) @ end of the second stmfd block
+
+ UNWIND( .fnstart )
+ UNWIND( .save {r0, r4, lr} ) @ still in first stmfd block
14: ands ip, r2, #28
beq 16f
@@ -186,6 +213,7 @@ ENTRY(memmove)
16: add r1, r1, #(\pull / 8)
b 8b
+ UNWIND( .fnend )
.endm