mirror of https://github.com/acidanthera/audk.git
79 lines
2.1 KiB
ArmAsm
79 lines
2.1 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2014 - 2015, 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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# 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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#------------------------------------------------------------------------------
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# UINT32
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# EFIAPI
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# Pei2LoaderSwitchStack (
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# VOID
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# )
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)
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ASM_PFX(Pei2LoaderSwitchStack):
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xorl %eax, %eax
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jmp ASM_PFX(FspSwitchStack)
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#------------------------------------------------------------------------------
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# UINT32
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# EFIAPI
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# Loader2PeiSwitchStack (
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# VOID
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# )
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)
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ASM_PFX(Loader2PeiSwitchStack):
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jmp ASM_PFX(FspSwitchStack)
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#------------------------------------------------------------------------------
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# UINT32
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# EFIAPI
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# FspSwitchStack (
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# VOID
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# )
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(FspSwitchStack)
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ASM_PFX(FspSwitchStack):
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#
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#Save current contexts
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#
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push %eax
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pushf
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cli
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pusha
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sub $0x08, %esp
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sidt (%esp)
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#
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# Load new stack
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#
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push %esp
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call ASM_PFX(SwapStack)
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movl %eax, %esp
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#
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# Restore previous contexts
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#
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lidt (%esp)
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add $0x08,%esp
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popa
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popf
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add $0x04,%esp
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ret
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