diff options
| author | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-05-30 02:03:15 +0000 |
|---|---|---|
| committer | qhuang8 <qhuang8@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-05-30 02:03:15 +0000 |
| commit | d2e6d78887995a14bb6f0c25266281749b126646 (patch) | |
| tree | cd1ffc760fb58893e5e6470baba7796973f85048 /MdePkg/Library/BaseLib/X64/SwitchStack.S | |
| parent | fbbe00ad9dd76ee2544324275449e9781e08073b (diff) | |
| download | edk2-platforms-d2e6d78887995a14bb6f0c25266281749b126646.tar.xz | |
1. Add comments about reserve space on space according to x64 calling convention
2. Fix comments in SwitchStack as for the x64 calling convention.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5315 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BaseLib/X64/SwitchStack.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/X64/SwitchStack.S | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/MdePkg/Library/BaseLib/X64/SwitchStack.S b/MdePkg/Library/BaseLib/X64/SwitchStack.S index 85cdb4306d..9aee37b0e9 100644 --- a/MdePkg/Library/BaseLib/X64/SwitchStack.S +++ b/MdePkg/Library/BaseLib/X64/SwitchStack.S @@ -1,6 +1,6 @@ #------------------------------------------------------------------------------ # -# Copyright (c) 2006, Intel Corporation +# Copyright (c) 2006 - 2008, Intel Corporation # 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 @@ -21,14 +21,14 @@ #------------------------------------------------------------------------------ # Routine Description: # -# Routine for switching stacks with 1 parameter +# Routine for switching stacks with 2 parameters # # Arguments: # -# (rdi) EntryPoint - Entry point with new stack. -# (rsi) Context1 - Parameter1 for entry point. -# (rdx) Context2 - Parameter2 for entry point. -# (rcx) NewStack - Pointer to new stack. +# (rcx) EntryPoint - Entry point with new stack. +# (rdx) Context1 - Parameter1 for entry point. +# (r8) Context2 - Parameter2 for entry point. +# (r9) NewStack - Pointer to new stack. # # Returns: # @@ -40,5 +40,9 @@ _InternalSwitchStack: mov %rcx, %rax mov %rdx, %rcx mov %r8, %rdx + #
+ # Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
+ # in case the callee wishes to spill them.
+ # lea -0x20(%r9), %rsp call *%rax |