270 lines
6.1 KiB
ArmAsm
270 lines
6.1 KiB
ArmAsm
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//
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// Module Name:
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//
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// jmpuwind.s
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//
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// Abstract:
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//
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// This module implements the IA64 specific routine to jump to the runtime
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// time library unwind routine.
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//
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// Author:
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//
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// William K. Cheung (wcheung) 4-Jan-1996
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//
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//
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// based on the version by David N. Cutler (davec) 12-Sep-1990
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//
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// Environment:
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//
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// Any mode.
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//
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// Revision History:
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//
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//--
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#include "ksia64.h"
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//++
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//
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// LONG
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// __C_ExecuteExceptionFilter (
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// ULONGLONG MemoryStack,
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// ULONGLONG BackingStore,
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// NTSTATUS ExceptionCode,
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// PEXCEPTION_POINTERS ExceptionPointers,
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// ULONGLONG ExceptionFilter,
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// ULONGLONG GlobalPointer
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// )
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//
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// Routine Description:
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//
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// This function sets the gp register and transfers control to the specified
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// exception filter routine.
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//
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// Arguments:
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//
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// MemoryStack (a0) - memory stack pointer of establisher frame
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//
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// BackingStore (a1) - backing store pointer of establisher frame
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//
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// ExceptionCode (a2) - Exception Code.
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//
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// ExceptionPointers (a3) - Supplies a pointer to the exception pointers
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// structure.
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//
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// ExceptionFilter (a4) - Entry point of exception filter
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//
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// GlobalPointer (a5) - GP of exception filter
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//
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// Return Value:
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//
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// The value returned by the exception filter routine.
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//
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//--
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LEAF_ENTRY(__C_ExecuteExceptionFilter)
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mov gp = a5
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mov bt0 = a4
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br bt0 // branch to exception filter
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;;
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LEAF_EXIT(__C_ExecuteExceptionFilter)
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//++
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//
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// VOID
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// __C_ExecuteTerminationHandler (
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// ULONGLONG MemoryStack,
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// ULONGLONG BackingStore,
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// BOOLEAN AbnormalTermination,
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// ULONGLONG TerminationHandler,
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// ULONGLONG GlobalPointer
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// )
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//
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// Routine Description:
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//
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// This function sets the gp register and transfers control to the specified
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// termination handler routine.
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//
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// Arguments:
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//
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// MemoryStack (a0) - memory stack pointer of establisher frame
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//
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// BackingStore (a1) - backing store pointer of establisher frame
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//
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// AbnormalTermination (a2) - Supplies a boolean value that determines
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// whether the termination is abnormal.
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//
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// TerminationHandler (a3) - Entry point of termination handler
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//
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// GlobalPointer (a4) - GP of termination handler
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//
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// Return Value:
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//
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// None.
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//
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//--
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LEAF_ENTRY(__C_ExecuteTerminationHandler)
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mov gp = a4
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mov bt0 = a3
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br bt0 // branch to termination handler
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;;
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LEAF_EXIT(__C_ExecuteTerminationHandler)
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//++
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//
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// VOID
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// __jump_unwind (
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// IN PVOID TargetMsFrame,
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// IN PVOID TargetBsFrame,
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// IN PVOID TargetPc,
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// )
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//
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// Routine Description:
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//
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// This function transfer control to unwind. It is used by the MIPS
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// compiler when a goto out of the body or a try statement occurs.
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//
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// Arguments:
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//
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// TargetMsFrame (a0) - Supplies the memory stack frame pointer of the
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// target of the unwind.
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//
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// TargetBsFrame (a1) - Supplies the backing store frame pointer of the
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// target of the unwind.
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//
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// TargetPc (a2) - Supplies the target instruction address where control
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// is to be transfered to after the unwind operation is complete.
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//
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// Return Value:
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//
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// None.
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//
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// N.B. The first 2 input registers are reused for local while the third
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// input register is reused as output register.
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//
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//--
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.global RtlUnwind2
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.type RtlUnwind2, @function
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.global RtlPcToFileHeader
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.type RtlPcToFileHeader, @function
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NESTED_ENTRY(__jump_unwind)
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.regstk 3, 2, 6, 0
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.prologue 0xC, loc0
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.fframe ContextFrameLength, Jn10
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alloc loc0 = ar.pfs, 3, 3, 6, 0
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mov loc1 = brp
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[Jn10:] add sp = -ContextFrameLength, sp
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;;
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mov loc2 = gp
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PROLOGUE_END
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//
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// Call RtlPcToFileHeader to get the image base of caller
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// The image base is returned in memory location STACK_SCRATCH_AREA, sp
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// and also in register v0
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//
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mov out0 = brp
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add out1 = STACK_SCRATCH_AREA, sp
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br.call.sptk brp = RtlPcToFileHeader
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;;
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mov gp = loc2
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//
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// Add image base to image relative offset passed in a2
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//
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add out2 = v0, a2
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//
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// Setup rest of arguments to RtlUnwind2
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//
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add out5 = STACK_SCRATCH_AREA, sp
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mov out4 = zero
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mov out3 = zero
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mov out1 = a1
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mov out0 = a0
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br.call.sptk brp = RtlUnwind2
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;;
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.restore Jn20
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[Jn20:] add sp = ContextFrameLength, sp
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nop.f 0
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mov ar.pfs = loc0
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nop.m 0
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mov brp = loc1
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br.ret.sptk brp
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NESTED_EXIT(__jump_unwind)
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//++
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// VOID
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// _NLG_Notify(
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// IN PVOID Funclet
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// IN FRAME_POINTERS EstablisherFrame,
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// IN ULONG NLGCode
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// )
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//
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// Routine Description:
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//
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// Provides the handler/longjmp addresses to the debugger
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//
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// Arguments:
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//
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// Funclet (a0) - Supplies the target address of non-local goto
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// EstablisherFrame (a1,a2) - Supplies a pointer to frame of the establisher
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// function
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// NLGCode (a3) - Supplies NLG identifying value
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//
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// Return Value:
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//
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// None.
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//
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//--
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.global __NLG_Dispatch
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.global __NLG_Destination
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.sdata
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__NLG_Destination::
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data8 0x19930520 // signature
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data8 0 // handler address
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data8 0 // code
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data8 0 // memory stack frame pointer
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data8 0 // register stack frame pointer
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LEAF_ENTRY(_NLG_Notify)
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add t0 = @gprel(__NLG_Destination+0x8), gp
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add t1 = @gprel(__NLG_Destination+0x10), gp
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nop.i 0
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;;
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st8 [t0] = a0, 16
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st8 [t1] = a3, 16
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nop.i 0
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;;
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st8 [t0] = a1
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st8 [t1] = a2
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nop.i 0
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__NLG_Dispatch::
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nop.m 0
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nop.i 0
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br.ret.sptk b0
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LEAF_EXIT(_NLG_Notify)
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