112a857f61
Wrote IA-32 (align stack to 16-bytes) gaskets for emulator and got it to compile for IA-32. TempRam switch code is not ported to IA-32 in Sec. Code crashes in Sec. Signed-off-by: andrewfish git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11849 6f19259b-4bc3-4df7-8a09-765794883524
104 lines
3.2 KiB
ArmAsm
104 lines
3.2 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http:#opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# Stack.asm
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#
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# Abstract:
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#
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# Switch the stack from temporary memory to permenent memory.
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#
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#------------------------------------------------------------------------------
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.text
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// EFI_STATUS
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// EFIAPI
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// SecTemporaryRamSupport (
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// IN CONST EFI_PEI_SERVICES **PeiServices, // %rcx
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// IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase, // %rdx
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// IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase, // %r8
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// IN UINTN CopySize // %r9
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// )
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//
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ASM_GLOBAL ASM_PFX(SecTemporaryRamSupport)
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ASM_PFX(SecTemporaryRamSupport):
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//------------------------------------------------------------------------------
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// VOID
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// EFIAPI
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// SecSwitchStack (
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// UINT32 TemporaryMemoryBase,
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// UINT32 PermenentMemoryBase
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// )//
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//------------------------------------------------------------------------------
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//
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// Save three register: eax, ebx, ecx
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//
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push %eax
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push %ebx
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push %ecx
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push %edx
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#if 0
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// Port me to GAS syntax
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//
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// !!CAUTION!! this function addresss is pushed into stack after
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// migration of whole temporary memory, so need save it to permenent
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// memory at first!
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//
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mov ebx, [esp + 20] // Save the first parameter
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mov ecx, [esp + 24] // Save the second parameter
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//
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// Save this functions return address into permenent memory at first.
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// Then, Fixup the esp point to permenent memory
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//
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mov eax, esp
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sub eax, ebx
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add eax, ecx
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mov edx, dword ptr [esp] // copy pushed registers value to permenent memory
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mov dword ptr [eax], edx
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mov edx, dword ptr [esp + 4]
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mov dword ptr [eax + 4], edx
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mov edx, dword ptr [esp + 8]
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mov dword ptr [eax + 8], edx
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mov edx, dword ptr [esp + 12]
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mov dword ptr [eax + 12], edx
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mov edx, dword ptr [esp + 16] // Update this functions return address into permenent memory
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mov dword ptr [eax + 16], edx
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mov esp, eax // From now, esp is pointed to permenent memory
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//
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// Fixup the ebp point to permenent memory
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//
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mov eax, ebp
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sub eax, ebx
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add eax, ecx
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mov ebp, eax // From now, ebp is pointed to permenent memory
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//
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// Fixup callees ebp point for PeiDispatch
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//
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mov eax, dword ptr [ebp]
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sub eax, ebx
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add eax, ecx
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mov dword ptr [ebp], eax // From now, Temporarys PPI callers stack is in permenent memory
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#endif
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pop %edx
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pop %ecx
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pop %ebx
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pop %eax
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ret
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