diff options
| author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-07-14 21:04:21 +0000 |
|---|---|---|
| committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-07-14 21:04:21 +0000 |
| commit | 67f86803ce95fad3df18d992998114e8c7243389 (patch) | |
| tree | 03cf2fde18022253e85112904615087557a1d114 /UnixPkg/Sec/X64/SwitchStack.S | |
| parent | 72ed3d7575874e6cad64dd4fe5bc6b5aa467b705 (diff) | |
| download | edk2-platforms-67f86803ce95fad3df18d992998114e8c7243389.tar.xz | |
Started trying to get the UnixPkg to compile for X64 with UnixABI. So far only have Sec compiling with Xcode. This is the first step in trying to get the EFIABI to work. Note since SEC is a Posix application it will still need to be Unix ABI.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10649 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UnixPkg/Sec/X64/SwitchStack.S')
| -rw-r--r-- | UnixPkg/Sec/X64/SwitchStack.S | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/UnixPkg/Sec/X64/SwitchStack.S b/UnixPkg/Sec/X64/SwitchStack.S new file mode 100644 index 0000000000..acc3df232c --- /dev/null +++ b/UnixPkg/Sec/X64/SwitchStack.S @@ -0,0 +1,111 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2008, Intel Corporation. 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.
+#
+# Module Name:
+#
+# SwitchStack.S
+#
+# Abstract:
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+# Routine Description:
+#
+# Routine for switching stacks with 3 parameters EFI ABI
+#
+# Arguments:
+#
+# (rcx) EntryPoint - Entry point with new stack.
+# (rdx) Context1 - Parameter1 for entry point.
+# (r8) Context2 - Parameter2 for entry point.
+# (r9) Context3 - Parameter3 for entry point.
+# (rsp)0x20 NewStack - The pointer to new stack.
+#
+# Returns:
+#
+# None
+#
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(MsftPeiSwitchStacks)
+ASM_PFX(MsftPeiSwitchStacks):
+ mov %rcx, %rax
+ mov %rdx, %rcx
+ mov %r8, %rdx
+ mov %r9, %r8
+
+ # get new stack from the stack
+ mov 0x20(%rsp), %rsp # is this off by 8?
+
+ #
+ # Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
+ # in case the callee wishes to spill them.
+ #
+ lea -0x20(%rsp), %rsp
+ call *%rax
+
+
+#------------------------------------------------------------------------------
+# Routine Description:
+#
+# Routine for switching stacks with 3 parameters UNIX ABI
+#
+# Arguments:
+#
+# (rdi) EntryPoint - Entry point with new stack.
+# (rsi) Context1 - Parameter1 for entry point.
+# (rdx) Context2 - Parameter2 for entry point.
+# (rcx) Context3 - Parameter3 for entry point.
+# (r8) NewStack - The pointer to new stack.
+#
+# Returns:
+#
+# None
+#
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(PeiSwitchStacks)
+ASM_PFX(PeiSwitchStacks):
+ mov %rdi, %rax
+ mov %rsi, %rdi
+ mov %rdx, %rsi
+ mov %rcx, %rdx
+ mov %r8, %rsp
+
+
+ #
+ # Reserve space for redzone on the stack,
+ # in case the callee wishes to spill them.
+ #
+ lea -0x80(%rsp), %rsp
+ call *%rax
+
+
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# SecSwitchStack (
+# UINT32 TemporaryMemoryBase, // Rcx, Rdi
+# UINT32 PermenentMemoryBase // Rdx, Rsi
+# );
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(SecSwitchStack)
+ASM_PFX(SecSwitchStack):
+
+ mov %rsp, %rax
+ sub %rdi, %rax
+ add %rsi, %rax
+ mov (%rip), %r10
+ mov %r10, (%rax)
+ ret
+
+
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