/* sigCtxALib.s - software signal architecture support library *//* Copyright 1984-1992 Wind River Systems, Inc. */	.text	.globl	_copyright_wind_river	.long	_copyright_wind_river/*modification history--------------------01e,10jan94,rrr  made 68000 not push format in sigCtxLoad (spr 2846)01d,31aug92,rrr  added setjmp routine01c,23aug92,jcf  cleanup.01b,10jul92,rrr  a minor tweek.01a,08jul92,rrr  written.*//*This library provides the architecture specific support needed bysoftware signals.*/#define _ASMLANGUAGE#include "vxWorks.h"	/* internals */	.globl	__sigCtxLoad	.globl	__sigCtxSave	.global _sigsetjmp/********************************************************************************* sigsetjmp - set non-local goto with option to save signal mask** This routine saves the current task context and program counter in <env>* for later use by siglongjmp().   It returns 0 when called.  However, when* program execution returns to the point at which sigsetjmp() was called and the* task context is restored by siglongjmp(), sigsetjmp() will then return the* value <val>, as specified in siglongjmp().** If the value of <savemask> argument is not zero, the sigsetjmp() function* shall save the current signal mask of the task as part of the calling* environment.** RETURNS: 0 or <val> if return is via siglongjmp().** SEE ALSO: longjmp()* int setjmp*    (*    jmp_buf env,       /@ where to save stack environment @/*    int     savemask	/@ whether or not to save the current signal mask @/*    )*/_sigsetjmp:	movel	a7@(8),a7@-	movel	a7@(8),a7@-	jsr	__setjmpSetup	addl	#8,a7	jmp	__sigCtxSave	.global _setjmp/********************************************************************************* setjmp - set non-local goto** This routine saves the current task context and program counter in <env>* for later use by longjmp().   It returns 0 when called.  However, when* program execution returns to the point at which setjmp() was called and the* task context is restored by longjmp(), setjmp() will then return the value* <val>, as specified in longjmp().** RETURNS: 0 or <val> if return is via longjmp().** SEE ALSO: longjmp()* int setjmp*    (*    jmp_buf env        /@ where to save stack environment @/*    )*/_setjmp:	movel	#1,a7@-	movel	a7@(8),a7@-	jsr	__setjmpSetup	addl	#8,a7	/* FALL THROUGH *//********************************************************************************* _sigCtxSave - Save the current context of the current task** This is just like setjmp except it doesn't worry about saving any sigmask.* It must also always return 0.** RETURNS: 0* int _sigCtxSave*     (*     REG_SET *pRegs		/@ Location to save current context @/*     )*/__sigCtxSave:	movel	a7@(4),a0	movew	sr,d0	movew	d0,a0@(16*4+2)			/* SR */	clrl	d0	movew	d0,a0@(16*4+2+2+4)		/* FORMAT */	movel	a7@(0),a1	movel	a1,a0@(16*4+2+2)		/* PC */	movel	a7,a1	addql	#4,a1	movel	a1,a0@(15*4)			/* SP */	moveml	d1-d7/a0-a6,a0@(4)	rts/********************************************************************************* _sigCtxLoad - Load a new context in the current task** This is just like longjmp, but every register must be loaded.* You could also look at this as half a context switch.** Be careful not to reset the stack pointer until you have read* all the data. Destroying stuff at the end of the stack seems to* be far game, this is very true of the debugger.** RETURNS: Never returns* void _sigCtxLoad*     (*     REG_SET *pRegs		/@ Context to load @/*     )*/__sigCtxLoad:	movel	a7@(4),a0	movel	a0@(15*4),a1#if (CPU != MC68000)	movew	a0@(16*4+2+2+4),a1@-#endif	movel	a0@(16*4+2+2),a1@-	movew	a0@(16*4+2),a1@-	movel	a1,a7@-	moveml	a0@(0),d0-d7/a0-a6	movel	a7@,a7	rte