about summary refs log tree commit diff
path: root/sysdeps/arm/memmove.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/arm/memmove.S')
-rw-r--r--sysdeps/arm/memmove.S16
1 files changed, 13 insertions, 3 deletions
diff --git a/sysdeps/arm/memmove.S b/sysdeps/arm/memmove.S
index f8a4eff2a4..dde877e5f3 100644
--- a/sysdeps/arm/memmove.S
+++ b/sysdeps/arm/memmove.S
@@ -141,7 +141,12 @@ ENTRY(memmove)
 		push	{r10}
 		cfi_adjust_cfa_offset (4)
 		cfi_rel_offset (r10, 0)
-		add	r10, pc, ip, lsl #(ARM_BX_ALIGN_LOG2 - 2)
+0:		add	r10, pc, ip, lsl #(ARM_BX_ALIGN_LOG2 - 2)
+		/* If alignment is not perfect, then there will be some
+		   padding (nop) instructions between this BX and label 6.
+		   The computation above assumed that two instructions
+		   later is exactly the right spot.  */
+		add	r10, #(6f - (0b + PC_OFS))
 		bx	r10
 #endif
 		.p2align ARM_BX_ALIGN_LOG2
@@ -172,11 +177,16 @@ ENTRY(memmove)
 		add	pc, pc, ip, lsl #(ARM_BX_ALIGN_LOG2 - 2)
 		nop
 #else
-		add	r10, pc, ip, lsl #(ARM_BX_ALIGN_LOG2 - 2)
+0:		add	r10, pc, ip, lsl #(ARM_BX_ALIGN_LOG2 - 2)
+		/* If alignment is not perfect, then there will be some
+		   padding (nop) instructions between this BX and label 66.
+		   The computation above assumed that two instructions
+		   later is exactly the right spot.  */
+		add	r10, #(66f - (0b + PC_OFS))
 		bx	r10
 #endif
 		.p2align ARM_BX_ALIGN_LOG2
-		nop
+66:		nop
 		.p2align ARM_BX_ALIGN_LOG2
 		sfi_breg r0, \
 		str	r3, [\B, #-4]!