d18d8a1d0e
Signed-off-by: jljusten git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11919 6f19259b-4bc3-4df7-8a09-765794883524
54 lines
1.9 KiB
ArmAsm
54 lines
1.9 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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# Portitions copyright (c) 2011, Apple Inc. All rights reserved.
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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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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# Routine Description:
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#
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# Routine for switching stacks with 2 parameters EFI ABI
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# Convert UNIX to EFI ABI
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#
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# Arguments:
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#
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# (rdi) EntryPoint - Entry point with new stack.
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# (rsi) Context1 - Parameter1 for entry point. (rcx)
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# (rdx) Context2 - Parameter2 for entry point. (rdx)
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# (rcx) NewStack - The pointer to new stack.
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#
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# Returns:
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#
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# None
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#
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(PeiSwitchStacks)
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ASM_PFX(PeiSwitchStacks):
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pushq $0 // tells gdb to stop unwinding frame
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movq %rsp, %rbp
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movq %rcx, %rsp // update stack pointer
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movq %rdi, %rax // entry point to %rax
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movq %rsi, %rcx // Adjust Context1
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// Context2 already in the rigth spot
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#
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# Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
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# in case the callee wishes to spill them.
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#
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subq $32, %rsp // 32-byte shadow space plus alignment pad
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call *%rax
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