/*	@(#)setjmp.h	13.1 (RC International) 91/02/01 	*/

/*
 * jmp_buf offsets
 * This should really just be a struct sigcontext, but for historical
 * reasons ....
 * NOTE: THIS MUST MATCH the initial portion of struct sigcontext,
 *	sc_onsigstk, sc_sigmask, sc_pc, sc_regs, sc_mdlo, sc_mdhi,
 *	fpregs, and fpc_csr
 * must lie at offset equal to the corresponding entries in the jmp_buf
 * since longjmp performs a sigcleanup.
 * See libc routines setjmp/longjmp/sigvec, and kernel routines
 * sendsig/sigcleanup.
 */

#ifndef _SETJMP_H
#define _SETJMP_H

#define	JB_SSP		0		/* sigstack stack pointer */
#define	JB_ONSIGSTK	1		/* sigstack onsigstack flag */
#define	JB_SIGMASK	2		/* signal mask */
#define	JB_PC		3		/* program counter */
#define JB_SCSIGNUM     4               /* sc_signum */
#define JB_SCCODE       5               /* sc_code   */
#define	JB_REGS		6		/* registers */
#define	JB_ZERO		(JB_REGS+0)	/* register zero */
#define	JB_MAGIC	(JB_ZERO)	/* magic number saved at reg 0 */
#define	JB_AT		(JB_REGS+1)	/* AT */
#define	JB_V0		(JB_REGS+2)	/* function result regs */
#define	JB_V1		(JB_REGS+3)
#define	JB_A0		(JB_REGS+4)	/* argument regs */
#define	JB_A1		(JB_REGS+5)
#define	JB_A2		(JB_REGS+6)
#define	JB_A3		(JB_REGS+7)
#define	JB_T0		(JB_REGS+8)	/* caller saved regs */
#define	JB_T1		(JB_REGS+9)
#define	JB_T2		(JB_REGS+10)
#define	JB_T3		(JB_REGS+11)
#define	JB_T4		(JB_REGS+12)
#define	JB_T5		(JB_REGS+13)
#define	JB_T6		(JB_REGS+14)
#define	JB_T7		(JB_REGS+15)
#define	JB_S0		(JB_REGS+16)	/* callee saved regs */
#define	JB_S1		(JB_REGS+17)
#define	JB_S2		(JB_REGS+18)
#define	JB_S3		(JB_REGS+19)
#define	JB_S4		(JB_REGS+20)
#define	JB_S5		(JB_REGS+21)
#define	JB_S6		(JB_REGS+22)
#define	JB_S7		(JB_REGS+23)
#define	JB_T8		(JB_REGS+24)	/* temps */
#define	JB_T9		(JB_REGS+25)
#define	JB_K0		(JB_REGS+26)	/* kernel regs */
#define	JB_K1		(JB_REGS+27)
#define	JB_GP		(JB_REGS+28)	/* frame pointer */
#define	JB_SP		(JB_REGS+29)	/* stack pointer */
#define	JB_FP		(JB_REGS+30)	/* frame pointer */
#define	JB_RA		(JB_REGS+31)	/* return address */

#define JB_S8		JB_FP		/* The name JB_FP is obsolete */

#define	JB_FREGS	41		/* floating-point registers */
#define	JB_F0		(JB_FREGS+0)	/* function result regs */
#define	JB_F1		(JB_FREGS+1)
#define	JB_F2		(JB_FREGS+2)
#define	JB_F3		(JB_FREGS+3)
#define	JB_F4		(JB_FREGS+4)	/* caller save regs */
#define	JB_F5		(JB_FREGS+5)
#define	JB_F6		(JB_FREGS+6)
#define	JB_F7		(JB_FREGS+7)
#define	JB_F8		(JB_FREGS+8)
#define	JB_F9		(JB_FREGS+9)
#define	JB_F10		(JB_FREGS+10)
#define	JB_F11		(JB_FREGS+11)
#define	JB_F12		(JB_FREGS+12)	/* argument regs */
#define	JB_F13		(JB_FREGS+13)
#define	JB_F14		(JB_FREGS+14)
#define	JB_F15		(JB_FREGS+15)
#define	JB_F16		(JB_FREGS+16)	/* caller save regs */
#define	JB_F17		(JB_FREGS+17)
#define	JB_F18		(JB_FREGS+18)
#define	JB_F19		(JB_FREGS+19)
#define	JB_F20		(JB_FREGS+20)	/* callee save regs */
#define	JB_F21		(JB_FREGS+21)
#define	JB_F22		(JB_FREGS+22)
#define	JB_F23		(JB_FREGS+23)
#define	JB_F24		(JB_FREGS+24)
#define	JB_F25		(JB_FREGS+25)
#define	JB_F26		(JB_FREGS+26)
#define	JB_F27		(JB_FREGS+27)
#define	JB_F28		(JB_FREGS+28)
#define	JB_F29		(JB_FREGS+29)
#define	JB_F30		(JB_FREGS+30)
#define	JB_F31		(JB_FREGS+31)
#define JB_FPC_CSR	(JB_FREGS+32)	/* fp control and status register */

/*
 * WARNING: a jmp_buf must be as large as a sigcontext since
 * longjmp uses one to perform a sigreturn
 */
#define	SIGCONTEXT_PAD	48
#define	NJBREGS		(JB_RA+1+SIGCONTEXT_PAD)

/*
 * These are not part of a jmpbuf, but are part of the sigcontext
 * and are referenced from the signal trampoline code in sigvec.s
 */
#define	SC_MDLO		(JB_REGS+32)
#define	SC_MDHI		(JB_REGS+33)

#define	JBMAGIC		0xacedbade


#ifdef LANGUAGE_C

#ifndef LOCORE
typedef	int	jmp_buf[NJBREGS];
#endif /* LOCORE */

#define _SIGJBLEN NJBREGS

#if defined(__STDC__)

extern int setjmp(jmp_buf);
extern void longjmp(jmp_buf, int);

#if __STDC__ == 0 || defined(_POSIX_SOURCE) || defined(_XOPEN_SOURCE) 
/* non-ANSI standard compilation */
typedef int sigjmp_buf[_SIGJBLEN];
extern int sigsetjmp(sigjmp_buf, int);
extern void siglongjmp(sigjmp_buf, int);
#endif

#if __STDC__ != 0
#define setjmp(env)	setjmp(env)
#endif

#else /* Not __STDC__ */

typedef int sigjmp_buf[_SIGJBLEN];

extern int setjmp();
extern void longjmp();
extern int sigsetjmp();
extern void siglongjmp();

#endif  /* __STDC__ */


#endif /* LANGUAGE_C */

#endif /* _SETJMP_H */