de949fdbcf
Fix various typos in comments and documentation. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Andrew Fish <afish@apple.com> Cc: Ray Ni <ray.ni@intel.com> Signed-off-by: Antoine Coeur <coeur@gmx.fr> Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com> Acked-by: Liming Gao <liming.gao@intel.com> Signed-off-by: Philippe Mathieu-Daude <philmd@redhat.com> Message-Id: <20200207010831.9046-5-philmd@redhat.com>
67 lines
2.3 KiB
ArmAsm
67 lines
2.3 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
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# Portions copyright (c) 2011, Apple Inc. All rights reserved.
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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#------------------------------------------------------------------------------
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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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// Adjust callers %rbp to account for stack move
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subq %rdx, %rbp // Calc offset of %rbp in Temp Memory
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addq %r8, %rbp // add in permanent base to offset
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pushq %rbp // stack frame is for the debugger
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movq %rsp, %rbp
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pushq %rdx // Save TemporaryMemoryBase
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pushq %r8 // Save PermanentMemoryBase
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pushq %r9 // Save CopySize
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//
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// Copy all of temp RAM to permanent memory, including stack
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//
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// CopyMem (PermanentMemoryBase, TemporaryMemoryBase, CopySize);
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// %rcx, %rdx, %r8
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movq %r8, %rcx // Shift arguments
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movq %r9, %r8
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subq $0x28, %rsp // Allocate register spill area & 16-byte align stack
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call ASM_PFX(CopyMem)
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// Temp mem stack now copied to permanent location. %esp still in temp memory
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addq $0x28, %rsp
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popq %r9 // CopySize (old stack)
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popq %r8 // PermanentMemoryBase (old stack)
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popq %rdx // TemporaryMemoryBase (old stack)
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movq %rsp, %rcx // Move to new stack
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subq %rdx, %rcx // Calc offset of stack in Temp Memory
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addq %r8, %rcx // Calc PermanentMemoryBase address
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movq %rcx, %rsp // Update stack
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// Stack now points to permanent memory
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// ZeroMem (TemporaryMemoryBase /* rcx */, CopySize /* rdx */);
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movq %rdx, %rcx
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movq %r9, %rdx
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subq $0x28, %rsp // Allocate register spill area & 16-byte align stack
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call ASM_PFX(ZeroMem)
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addq $0x28, %rsp
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// This data comes off the NEW stack
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popq %rbp
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ret
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