0765ee6cd3
For scene of
HandOffToDxeCore()->SwitchStack(DxeCoreEntryPoint)->
InternalSwitchStack()->LongJump(),Variable HobList.Raw
will be passed (from *Context1 to register a0) to
DxeMain() in parameter *HobStart.
However, meanwhile the function LongJump() overrides
register a0 with a1 (-1) due to commit (ea628f28e5 "RISCV: Fix
InternalLongJump to return correct value"), then cause hang.
Replacing calling LongJump() with new InternalSwitchStackAsm() to pass
addres data in register s0 to register a0 could fix this issue (just
like the solution in MdePkg/Library/BaseLib/AArch64/SwitchStack.S)
Signed-off-by: Yang Wang <wangyang@bosc.ac.cn>
Cc: Bamvor Jian ZHANG <zhangjian@bosc.ac.cn>
Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Ran Wang <wangran@bosc.ac.cn>
Reviewed-by: Andrei Warkentin <andrei.warkentin@intel.com>
38 lines
992 B
ArmAsm
38 lines
992 B
ArmAsm
//------------------------------------------------------------------------------
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//
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// InternalSwitchStackAsm for RISC-V
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//
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// Copyright (c) 2023, Bosc Corporation. All rights reserved.<BR>
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//
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//------------------------------------------------------------------------------
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.align 3
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#/**
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#
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# This allows the caller to switch the stack and goes to the new entry point
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#
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# @param Context Parameter to pass in
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# @param Context2 Parameter2 to pass in
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# @param EntryPoint The pointer to the location to enter
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# @param NewStack New Location of the stack
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#
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# @return Nothing. Goes to the Entry Point passing in the new parameters
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#
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#**/
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#VOID
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#EFIAPI
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#InternalSwitchStackAsm (
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# VOID *Context,
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# VOID *Context2,
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# SWITCH_STACK_ENTRY_POINT EntryPoint,
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# VOID *NewStack
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# );
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#
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.globl InternalSwitchStackAsm
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InternalSwitchStackAsm:
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mv ra, a2
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mv sp, a3
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ret
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