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Add support for semihosting with GCC. Still needs more testing.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11168 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2010-12-15 01:00:54 +00:00
parent e7cb469e3a
commit d9629029f2
3 changed files with 59 additions and 1 deletions
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35
ArmPkg/Library/SemihostLib/Arm/GccSemihost.S Executable file
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@@ -0,0 +1,35 @@
#------------------------------------------------------------------------------
#
# 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
*/
ASM_PFX(GccSemihostCall):
svc #0x123456
bx lr