diff options
| author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-07-12 03:01:34 +0000 |
|---|---|---|
| committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-07-12 03:01:34 +0000 |
| commit | bab427db7d91689247914608b975e629ccb34d7e (patch) | |
| tree | ca2404c89e0956d8172c165fd31600507ea48950 /MdePkg/Library/BaseLib/Ia32 | |
| parent | 271d2c7f99612aae7b487cdad9c391373384e19b (diff) | |
| download | edk2-platforms-bab427db7d91689247914608b975e629ccb34d7e.tar.xz | |
MdePkg: Fix X64 clang compile issues.
Fixed issues with X64 clang, and also make StackSwitch push a zero on the new stack to prevent a stack unwind into memory that is no longer valid.
signed-off-by: andrewfish
reviewed-by: lgao4
reviewed-by: mdkinney
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12007 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.S b/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.S new file mode 100644 index 0000000000..4fe0e35569 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/InternalSwitchStack.S @@ -0,0 +1,48 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+# Portions copyright (c) 2011, Apple Inc. All rights reserved.
+# 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.
+#
+# Module Name:
+#
+# InternalSwitchStack.S
+#
+# Abstract:
+#
+# Implementation of a stack switch on IA-32.
+#
+#------------------------------------------------------------------------------
+
+ASM_GLOBAL ASM_PFX(InternalSwitchStack)
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# InternalSwitchStack (
+# IN SWITCH_STACK_ENTRY_POINT EntryPoint,
+# IN VOID *Context1, OPTIONAL
+# IN VOID *Context2, OPTIONAL
+# IN VOID *NewStack
+# );
+#------------------------------------------------------------------------------
+ASM_PFX(InternalSwitchStack):
+ pushl %ebp
+ movl %esp, %ebp
+
+ movl 20(%ebp), %esp # switch stack
+ subl $8, %esp
+
+ movl 16(%ebp), %eax
+ movl %eax, 4(%esp)
+ movl 12(%ebp), %eax
+ movl %eax, (%esp)
+ pushl $0 # keeps gdb from unwinding stack
+ jmp *8(%ebp) # call and never return
+
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