Revision: 19281
http://sourceforge.net/p/edk2/code/19281
Author: abiesheuvel
Date: 2015-12-15 15:01:58 +0000 (Tue, 15 Dec 2015)
Log Message:
-----------
ArmPkg/CompilerIntrinsicsLib: add GCC version of __aeabi_memset()
CLANG for ARM may emit calls to __aeabi_memset(), which is subtly different
from the default memset() [arguments 2 and 3 are reversed]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Leif Lindholm <[email protected]>
Modified Paths:
--------------
trunk/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.S
Modified: trunk/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.S
===================================================================
--- trunk/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.S
2015-12-15 15:01:42 UTC (rev 19280)
+++ trunk/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.S
2015-12-15 15:01:58 UTC (rev 19281)
@@ -15,24 +15,39 @@
.text
+ .syntax unified
.align 2
GCC_ASM_EXPORT (memset)
+ GCC_ASM_EXPORT (__aeabi_memset)
# VOID
# EFIAPI
+# __aeabi_memset (
+# IN VOID *Destination,
+# IN UINT32 Size
+# IN UINT32 Character,
+# );
+ASM_PFX(__aeabi_memset):
+ subs ip, r1, #0
+ bxeq lr
+ mov r1, r2
+ b L10
+
+# VOID
+# EFIAPI
# memset (
# IN VOID *Destination,
# IN UINT32 Character,
# IN UINT32 Size
# );
ASM_PFX(memset):
- cmp r2, #0
+ subs ip, r2, #0
bxeq lr
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 1, uses_anonymous_args = 0
L10:
strb r1, [r0], #1
- subs r2, r2, #1
+ subs ip, ip, #1
@ While size is not 0
bne L10
bx lr
------------------------------------------------------------------------------
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