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MdePkg: Fix X64 clang compile issues.

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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with X64 clang, and also make StackSwitch push a zero on the new stack to prevent a stack unwind into memory that is no longer valid.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
This commit is contained in:
andrewfish
2011-07-12 03:01:34 +00:00
parent 271d2c7f99
commit bab427db7d
5 changed files with 93 additions and 29 deletions
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8
MdePkg/Library/BaseLib/X64/SwitchStack.S
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@@ -37,7 +37,10 @@
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(InternalSwitchStack)
ASM_PFX(InternalSwitchStack):
mov %rcx, %rax
pushq %rbp
movq %rsp, %rbp
mov %rcx, %rax // Shift registers for new call
mov %rdx, %rcx
mov %r8, %rdx
#
@@ -45,4 +48,5 @@ ASM_PFX(InternalSwitchStack):
# in case the callee wishes to spill them.
#
lea -0x20(%r9), %rsp
call *%rax
pushq $0 // stop gdb stack unwind
jmp *%rax // call EntryPoint ()