285 lines
6.2 KiB
PHP
285 lines
6.2 KiB
PHP
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; Copyright (c) 1989 Microsoft Corporation
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;
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; Module Name:
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;
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; mac386.inc - 386 machine specific assembler macros
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;
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; Abstract:
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;
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; This module contains 386 machine specific (assembler) macros
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; applicable to code outside the kernel. Note that
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; ACQUIRE_SPINLOCK_DIRECT assumes the PCR is handy, so it won't
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; work in user mode (with debugging turned on.)
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;
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; Author:
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;
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; Bryan Willman (bryanwi) 1 Aug 90
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;
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;++
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;
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; YIELD
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;
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; Macro Description:
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;
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; This macro implements the yield instruction
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;--
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YIELD macro
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ifndef NT_UP
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db 0f3h
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db 090h
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endif
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endm
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if NT_INST
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else
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;++
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;
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; ACQUIRE_SPINLOCK LockAddress, SpinLabel
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;
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; Macro Description:
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;
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; This macro acquires a kernel spin lock.
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;
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; N.B. This macro assumes that the current IRQL is set properly.
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; It neither raises nor lowers IRQL.
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;
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; Arguments:
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;
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; (KSPIN_LOCK) LockAddress - address of SpinLock value
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; SpinLabel - if acquire spinlock fail, the label to perform the
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; spin checking. It could be simply a "label" or
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; "short label" which means the label is within 128
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; bytes in distant.
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;
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; NoChecking - Not blank, if no debugging code should be generated.
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;--
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ACQUIRE_SPINLOCK macro LockAddress, SpinLabel, NoChecking
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.errb <LockAddress>
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.errb <SpinLabel>
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ifndef NT_UP
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;
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; Attempt to assert the lock
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;
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lock bts dword ptr [LockAddress], 0 ; test and set the spinlock
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jc SpinLabel ; spinlock owned, go SpinLabe
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if DBG
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ifb <NoChecking>
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push edi ; save edi
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mov edi,fs:PcPrcb
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mov edi, [edi].PbCurrentThread
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or edi, 1 ; spinlock owned
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mov [LockAddress], edi ; remember current thread
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pop edi ; restore edi
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endif ; NoChecking
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endif ; DBG
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endif ; NT_UP
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endm
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;++
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;
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; SPIN_ON_SPINLOCK LockAddress, AcquireLabel
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;
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; Macro Description:
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;
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; This macro spins on a kernel spin lock.
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;
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; N.B. This macro assumes that the current IRQL is set properly.
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; It neither raises nor lowers IRQL.
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;
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; Arguments:
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;
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; (KSPIN_LOCK) LockAddress - address of a SpinLock value
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;
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; SpinLabel - if the test on cleared spinlock sucess, the label
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; to assert the spin lock. It could be simply a
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; "label" or "short label" which means the label is
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; within 128 bytes in distance.
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;
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; NoChecking - Not blank, if no debugging code should be generated.
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;--
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SPIN_ON_SPINLOCK macro LockAddress, AcquireLabel, NoChecking, PollDebugger, NoTimeout
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local a,flag ; define a local label
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.errb <LockAddress>
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.errb <AcquireLabel>
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ifndef NT_UP
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if DBG
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EXTRNP Kii386SpinOnSpinLock,2
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flag = 0
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ifb <NoChecking>
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flag = flag + 1
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endif
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ifnb <Polldebugger>
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flag = flag + 2
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endif
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ifb <NoTimeout>
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flag = flag + 4
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endif
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stdCall Kii386SpinOnSpinLock,<LockAddress,flag>
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jmp AcquireLabel
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else ; DBG
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;
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; Non-Debug version
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;
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a: test dword ptr [LockAddress], 1 ; Was spinlock cleared?
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jz AcquireLabel ; Yes, go get it
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YIELD
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jmp short a
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endif ; DBG
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endif ; NT_UP
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endm
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;++
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;
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; TEST_SPINLOCK LockAddress, BusyLabel
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;
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; Macro Description:
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;
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; This macro tests a kernel spin lock to see if it's busy.
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; If it's not busy, ACQUIRE_SPINLOCK still needs to be called
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; to obtain the spinlock in a locked manner.
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;
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; Arguments:
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;
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; (KSPIN_LOCK) LockAddress - address of a SpinLock value
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TEST_SPINLOCK macro LockAddress, BusyLabel
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test dword ptr [LockAddress], 1 ; spinlock clear?
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jnz BusyLabel ; No, then busy
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endm
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;++
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;
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; RELEASE_SPINLOCK LockAddress
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;
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; Macro Description:
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;
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; This macro releases a kernel spin lock.
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;
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; N.B. This macro assumes that the current IRQL is set properly.
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; It neither raises nor lowers IRQL.
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;
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; Arguments:
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;
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; (KSPIN_LOCK) LockAddress - Supplies an address to a spin lock value
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; NoChecking - Not blank, if no debugging code should be generated.
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;--
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RELEASE_SPINLOCK macro LockAddress, NoChecking
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local a
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.errb <LockAddress>
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ifndef NT_UP
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if DBG
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ifb <NoChecking>
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EXTRNP _KeBugCheckEx,5
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push edi ; save edi
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mov edi,fs:PcPrcb
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mov edi,[edi].PbCurrentThread
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or edi, 1 ; assume current thread owns the lock
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cmp edi, [LockAddress] ; Does current thread own the lock?
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pop edi ; restore edi
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jz short a ; if z, yes, goto a and release lock
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stdCall _KeBugCheckEx,<SPIN_LOCK_NOT_OWNED,LockAddress,0,0,0>
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a:
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endif
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mov dword ptr [LockAddress], 0
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else
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mov byte ptr [LockAddress], 0
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endif ; DBG
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endif ; NT_UP
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endm
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endif
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if NT_INST
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;
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; These are the instrumentation version of the above functions.
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; internal use only
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;
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ACQUIRE_SPINLOCK macro LockAddress, SpinLabel, NoChecking
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EXTRNP KiInst_AcquireSpinLock,0
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ifidni <&LockAddress>, <eax>
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stdCall KiInst_AcquireSpinLock
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else
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push eax
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mov eax, LockAddress
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stdCall KiInst_AcquireSpinLock
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pop eax
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endif
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jc SpinLabel
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endm
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SPIN_ON_SPINLOCK macro LockAddress, AcquireLabel, NoChecking, PollDebugger
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EXTRNP KiInst_SpinOnSpinLock,0
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ifidni <&LockAddress>, <eax>
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stdCall KiInst_SpinOnSpinLock
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else
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push eax
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mov eax, LockAddress
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stdCall KiInst_SpinOnSpinLock
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pop eax
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endif
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jmp AcquireLabel
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endm
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TEST_SPINLOCK macro LockAddress, BusyLabel
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EXTRNP KiInst_TestSpinLock,0
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ifidni <&LockAddress>, <eax>
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stdCall KiInst_TestSpinLock
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else
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push eax
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mov eax, LockAddress
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stdCall KiInst_TestSpinLock
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pop eax
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endif
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jnc AcquireLabel
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endm
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RELEASE_SPINLOCK macro LockAddress, NoChecking
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EXTRNP KiInst_ReleaseSpinLock,0
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ifidni <&LockAddress>, <eax>
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stdCall KiInst_ReleaseSpinLock
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else
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push eax
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mov eax, LockAddress
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stdCall KiInst_ReleaseSpinLock
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pop eax
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endif
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endm
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endif
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