diff options
Diffstat (limited to 'ArmPkg/Library/SemihostLib/Arm/GccSemihost.S')
-rwxr-xr-x | ArmPkg/Library/SemihostLib/Arm/GccSemihost.S | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/ArmPkg/Library/SemihostLib/Arm/GccSemihost.S b/ArmPkg/Library/SemihostLib/Arm/GccSemihost.S index 2d33664f7d..4aa886182f 100755 --- a/ArmPkg/Library/SemihostLib/Arm/GccSemihost.S +++ b/ArmPkg/Library/SemihostLib/Arm/GccSemihost.S @@ -1,41 +1,41 @@ -#------------------------------------------------------------------------------ -# -# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> -# -# This program and the accompanying materials -# are licensed and made available under the terms and conditions of the BSD License -# which accompanies this distribution. The full text of the license may be found at -# http://opensource.org/licenses/bsd-license.php -# -# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. -# -#------------------------------------------------------------------------------ - -.text -.align 2 - -.globl ASM_PFX(GccSemihostCall) -INTERWORK_FUNC(GccSemihostCall) - -/* - Semihosting operation request mechanism - - SVC 0x123456 in ARM state (for all architectures) - SVC 0xAB in Thumb state (excluding ARMv7-M) - BKPT 0xAB for ARMv7-M (Thumb-2 only) - - R0 - operation type - R1 - block containing all other parametes - - lr - must be saved as svc instruction will cause an svc exception and write - the svc lr register. That happens to be the one we are using, so we must - save it or we will not be able to return. - */ -ASM_PFX(GccSemihostCall): +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#------------------------------------------------------------------------------
+
+.text
+.align 2
+
+.globl ASM_PFX(GccSemihostCall)
+INTERWORK_FUNC(GccSemihostCall)
+
+/*
+ Semihosting operation request mechanism
+
+ SVC 0x123456 in ARM state (for all architectures)
+ SVC 0xAB in Thumb state (excluding ARMv7-M)
+ BKPT 0xAB for ARMv7-M (Thumb-2 only)
+
+ R0 - operation type
+ R1 - block containing all other parametes
+
+ lr - must be saved as svc instruction will cause an svc exception and write
+ the svc lr register. That happens to be the one we are using, so we must
+ save it or we will not be able to return.
+ */
+ASM_PFX(GccSemihostCall):
stmfd sp!, {lr}
- svc #0x123456 + svc #0x123456
ldmfd sp!, {lr}
- bx lr - - + bx lr
+
+
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