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;;
;; Licensed to the .NET Foundation under one or more agreements.
;; The .NET Foundation licenses this file to you under the MIT license.
;; See the LICENSE file in the project root for more information.
;;
include AsmOffsets.inc ; generated by the build from AsmOffsets.cpp
;;
;; MACROS
;;
FASTCALL_FUNC macro FuncName,cbArgs
FuncNameReal EQU @&FuncName&@&cbArgs
FuncNameReal proc public
endm
FASTCALL_ENDFUNC macro
FuncNameReal endp
endm
ALTERNATE_ENTRY macro Name
decoratedName TEXTEQU @CatStr( _, Name ) )
decoratedName label proc
PUBLIC decoratedName
endm
LABELED_RETURN_ADDRESS macro Name
decoratedName TEXTEQU @CatStr( _, Name ) )
decoratedName label proc
PUBLIC decoratedName
endm
EXPORT_POINTER_TO_ADDRESS macro Name
local AddressToExport
AddressToExport label proc
.const
align 4
Name dd offset AddressToExport
public Name
.code
endm
__tls_array equ 2Ch ;; offsetof(TEB, ThreadLocalStoragePointer)
;;
;; __declspec(thread) version
;;
INLINE_GETTHREAD macro destReg, trashReg
ASSUME fs : NOTHING
EXTERN __tls_index : DWORD
EXTERN _tls_CurrentThread : DWORD
mov destReg, [__tls_index]
mov trashReg, fs:[__tls_array]
mov destReg, [trashReg + destReg * 4]
add destReg, SECTIONREL _tls_CurrentThread
endm
INLINE_THREAD_UNHIJACK macro threadReg, trashReg1, trashReg2
;;
;; Thread::Unhijack()
;;
mov trashReg1, [threadReg + OFFSETOF__Thread__m_pvHijackedReturnAddress]
cmp trashReg1, 0
je @F
mov trashReg2, [threadReg + OFFSETOF__Thread__m_ppvHijackedReturnAddressLocation]
mov [trashReg2], trashReg1
mov dword ptr [threadReg + OFFSETOF__Thread__m_ppvHijackedReturnAddressLocation], 0
mov dword ptr [threadReg + OFFSETOF__Thread__m_pvHijackedReturnAddress], 0
@@:
endm
;;
;; Macro used from unmanaged helpers called from managed code where the helper does not transition immediately
;; into pre-emptive mode but may cause a GC and thus requires the stack is crawlable. This is typically the
;; case for helpers that meddle in GC state (e.g. allocation helpers) where the code must remain in
;; cooperative mode since it handles object references and internal GC state directly but a garbage collection
;; may be inevitable. In these cases we need to be able to transition to pre-meptive mode deep within the
;; unmanaged code but still be able to initialize the stack iterator at the first stack frame which may hold
;; interesting GC references. In all our helper cases this corresponds to the most recent managed frame (e.g.
;; the helper's caller).
;;
;; This macro builds a frame describing the current state of managed code.
;;
;; The macro assumes it is called from a helper that has already set up an EBP frame and that the values of
;; EBX, ESI and EDI remain unchanged from their values in managed code. It pushes the frame at the top of the
;; stack.
;;
;; EAX is trashed by this macro.
;;
PUSH_COOP_PINVOKE_FRAME macro transitionFrameReg
lea eax, [ebp + 8] ; get the ESP of the caller
push eax ; save ESP
push edi
push esi
push ebx
push PTFF_SAVE_ALL_PRESERVED + PTFF_SAVE_RSP
push eax ; Thread * (unused by stackwalker)
mov eax, [ebp + 0] ; Find previous EBP value
push eax ; save EBP
mov eax, [ebp + 4] ; Find the return address
push eax ; save m_RIP
lea transitionFrameReg, [esp + 0] ; transitionFrameReg == address of frame
endm
;;
;; Remove the frame from a previous call to PUSH_COOP_PINVOKE_FRAME from the top of the stack and restore EBX,
;; ESI and EDI to their previous values.
;;
;; TRASHES ECX
;;
POP_COOP_PINVOKE_FRAME macro
add esp, 4*4
pop ebx
pop esi
pop edi
pop ecx
endm
;;
;; CONSTANTS -- INTEGER
;;
TSF_Attached equ 01h
TSF_SuppressGcStress equ 08h
TSF_DoNotTriggerGc equ 10h
;; GC type flags
GC_ALLOC_FINALIZE equ 1
;; Note: these must match the defs in PInvokeTransitionFrameFlags
PTFF_SAVE_RBX equ 00000001h
PTFF_SAVE_RSI equ 00000002h
PTFF_SAVE_RDI equ 00000004h
PTFF_SAVE_ALL_PRESERVED equ 00000007h ;; NOTE: RBP is not included in this set!
PTFF_SAVE_RSP equ 00008000h
PTFF_SAVE_RAX equ 00000100h ;; RAX is saved if it contains a GC ref and we're in hijack handler
PTFF_SAVE_ALL_SCRATCH equ 00000700h
PTFF_RAX_IS_GCREF equ 00010000h ;; iff PTFF_SAVE_RAX: set -> eax is Object, clear -> eax is scalar
PTFF_RAX_IS_BYREF equ 00020000h ;; iff PTFF_SAVE_RAX: set -> eax is ByRef, clear -> eax is Object or scalar
PTFF_THREAD_ABORT equ 00040000h ;; indicates that ThreadAbortException should be thrown when returning from the transition
;; These must match the TrapThreadsFlags enum
TrapThreadsFlags_None equ 0
TrapThreadsFlags_AbortInProgress equ 1
TrapThreadsFlags_TrapThreads equ 2
;; This must match HwExceptionCode.STATUS_REDHAWK_THREAD_ABORT
STATUS_REDHAWK_THREAD_ABORT equ 43h
;;
;; Rename fields of nested structs
;;
OFFSETOF__Thread__m_alloc_context__alloc_ptr equ OFFSETOF__Thread__m_rgbAllocContextBuffer + OFFSETOF__gc_alloc_context__alloc_ptr
OFFSETOF__Thread__m_alloc_context__alloc_limit equ OFFSETOF__Thread__m_rgbAllocContextBuffer + OFFSETOF__gc_alloc_context__alloc_limit
;;
;; CONSTANTS -- SYMBOLS
;;
RhDebugBreak equ @RhDebugBreak@0
RhpGcAlloc equ @RhpGcAlloc@16
G_LOWEST_ADDRESS equ _g_lowest_address
G_HIGHEST_ADDRESS equ _g_highest_address
G_EPHEMERAL_LOW equ _g_ephemeral_low
G_EPHEMERAL_HIGH equ _g_ephemeral_high
G_CARD_TABLE equ _g_card_table
RhpWaitForSuspend2 equ @RhpWaitForSuspend2@0
RhpWaitForGC2 equ @RhpWaitForGC2@4
RhpReversePInvokeAttachOrTrapThread2 equ @RhpReversePInvokeAttachOrTrapThread2@4
RhpTrapThreads equ _RhpTrapThreads
RhpPublishObject equ @RhpPublishObject@8
ifdef FEATURE_GC_STRESS
THREAD__HIJACKFORGCSTRESS equ ?HijackForGcStress@Thread@@SGXPAUPAL_LIMITED_CONTEXT@@@Z
REDHAWKGCINTERFACE__STRESSGC equ ?StressGc@RedhawkGCInterface@@SGXXZ
endif ;; FEATURE_GC_STRESS
;;
;; IMPORTS
;;
EXTERN RhpGcAlloc : PROC
EXTERN RhDebugBreak : PROC
EXTERN RhpWaitForSuspend2 : PROC
EXTERN RhpWaitForGC2 : PROC
EXTERN RhpReversePInvokeAttachOrTrapThread2 : PROC
EXTERN RhExceptionHandling_FailedAllocation : PROC
EXTERN RhpPublishObject : PROC
EXTERN RhpCalculateStackTraceWorker : PROC
EXTERN RhThrowHwEx : PROC
EXTERN RhThrowEx : PROC
EXTERN RhRethrow : PROC
ifdef FEATURE_GC_STRESS
EXTERN THREAD__HIJACKFORGCSTRESS : PROC
EXTERN REDHAWKGCINTERFACE__STRESSGC : PROC
endif ;; FEATURE_GC_STRESS
EXTERN G_LOWEST_ADDRESS : DWORD
EXTERN G_HIGHEST_ADDRESS : DWORD
EXTERN G_EPHEMERAL_LOW : DWORD
EXTERN G_EPHEMERAL_HIGH : DWORD
EXTERN G_CARD_TABLE : DWORD
EXTERN RhpTrapThreads : DWORD
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