//	TITLE("POSIX Thunks)
/*++

Copyright (c) 1991  Microsoft Corporation

Module Name:

    psxthunk.s

Abstract:


Author:

    Ellena Aycock-Wright (ellena) 11-Jan-1991

Revision History:

--*/

#include "ksmips.h"


//++
//
// The following code is never executed.  Its purpose is to support
// unwinding through the call to the signal deliverer.  (Copied from
// ntos/rtl/mips/trampoln.s)
//
//--

#define FrameSize	(ContextFrameLength)

	NESTED_ENTRY(PdxNullApiCall, FrameSize, zero);

	.set	noreorder
	.set	noat
	sd	sp,CxXIntSp(sp)		// save stack pointer
	sd	ra,CxXIntRa(sp)		// save return address
	sw	ra,CxFir(sp)		// save return address
	sd	s8,CxXIntS8(sp)		// save integer register s8
	sd	gp,CxXIntGp(sp)		// save integer register gp
	sd	s0,CxXIntS0(sp)		// save integer register s0-s7
	sd	s1,CxXIntS1(sp)		//
	sd	s2,CxXIntS2(sp)		//
	sd	s3,CxXIntS3(sp)		//
	sd	s4,CxXIntS4(sp)		//
	sd	s5,CxXIntS5(sp)		//
	sd	s6,CxXIntS6(sp)		//
	sd	s7,CxXIntS7(sp)		//
	sdc1	f20,CxFltF20(sp)	// store floating registers f20 - f31
	sdc1	f22,CxFltF22(sp)	//
	sdc1	f24,CxFltF24(sp)	//
	sdc1	f26,CxFltF26(sp)	//
	sdc1	f28,CxFltF28(sp)	//
	sdc1	f30,CxFltF30(sp)	//
//	move	s8,sp			// set frame pointer
	.set	at
	.set	reorder

	PROLOGUE_END

        ALTERNATE_ENTRY(_PdxNullApiCaller)

	move	a0,sp			// set address of context record
        jal     PdxNullApiCaller   	// call null api caller

	.end PdxNullApiCaller


//++
//
// The following code is never executed.  Its purpose is to support
// unwinding through the call to the signal deliverer.  (Copied from
// ntos/rtl/mips/trampoln.s)
//
//--

	NESTED_ENTRY(PdxSignalDeliver, FrameSize, zero);

	.set	noreorder
	.set	noat
	sd	sp,CxXIntSp(sp)		// save stack pointer
	sd	ra,CxXIntRa(sp)		// save return address
	sw	ra,CxFir(sp)		// save return address
	sd	s8,CxXIntS8(sp)		// save integer register s8
	sd	gp,CxXIntGp(sp)		// save integer register gp
	sd	s0,CxXIntS0(sp)		// save integer register s0-s7
	sd	s1,CxXIntS1(sp)		//
	sd	s2,CxXIntS2(sp)		//
	sd	s3,CxXIntS3(sp)		//
	sd	s4,CxXIntS4(sp)		//
	sd	s5,CxXIntS5(sp)		//
	sd	s6,CxXIntS6(sp)		//
	sd	s7,CxXIntS7(sp)		//
	sdc1	f20,CxFltF20(sp)	// store floating registers f20 - f31
	sdc1	f22,CxFltF22(sp)	//
	sdc1	f24,CxFltF24(sp)	//
	sdc1	f26,CxFltF26(sp)	//
	sdc1	f28,CxFltF28(sp)	//
	sdc1	f30,CxFltF30(sp)	//
//	move	s8,sp			// set frame pointer
	.set	at
	.set	reorder

	PROLOGUE_END

//++
//
// VOID
// _PdxSignalDeliverer (
//	IN PCONTEXT Context,
//	IN sigset_t Mask,
//	IN int Signal,
//	IN _handler Handler
//	)
//
// Routine Description:
//
// The following routine provides linkage to POSIX client routines to perform
// signal delivery.
//
// Arguments:
//
//    s0 - s7 - Supply parameter values.
//
//    sp - Supplies the address of a context record.
//
// Return Value:
//
//    There is no return from these routines.
//
//--

	ALTERNATE_ENTRY(_PdxSignalDeliverer)

        move    a0,sp                   // set address of context record

        move    a1,s1                   // set previous block mask
	move	a2,s2			// set signal number
	move	a3,s3			// set signal handler

        jal     PdxSignalDeliverer      // deliver signal to POSIX client

	//NOTREACHED

        .end    _PdxSignalDeliverer