struct pt_regs {
	unsigned long gpr[32];
	unsigned long nip;
	unsigned long msr;
	unsigned long orig_gpr3;	/* Used for restarting system calls */
	unsigned long ctr;
	unsigned long link;
	unsigned long xer;
	unsigned long ccr;
	unsigned long mq;		/* 601 only (not used at present) */
					/* Used on APUS to hold IPL value. */
	unsigned long trap;		/* Reason for being here */
	unsigned long dar;		/* Fault registers */
	unsigned long dsisr;
	unsigned long result; 		/* Result of a system call */
};

/*
 * Offsets used by 'ptrace' system call interface.
 * These can't be changed without breaking binary compatibility
 * with MkLinux, etc.
 */
#define PT_R0	0
#define PT_R1	1
#define PT_R2	2
#define PT_R3	3
#define PT_R4	4
#define PT_R5	5
#define PT_R6	6
#define PT_R7	7
#define PT_R8	8
#define PT_R9	9
#define PT_R10	10
#define PT_R11	11
#define PT_R12	12
#define PT_R13	13
#define PT_R14	14
#define PT_R15	15
#define PT_R16	16
#define PT_R17	17
#define PT_R18	18
#define PT_R19	19
#define PT_R20	20
#define PT_R21	21
#define PT_R22	22
#define PT_R23	23
#define PT_R24	24
#define PT_R25	25
#define PT_R26	26
#define PT_R27	27
#define PT_R28	28
#define PT_R29	29
#define PT_R30	30
#define PT_R31	31

#define PT_NIP	32
#define PT_MSR	33
#define PT_CTR	35
#define PT_LNK	36
#define PT_XER	37
#define PT_CCR	38
#define PT_MQ	39

#define PT_FPR0	48	/* each FP reg occupies 2 slots in this space */
#define PT_FPR31 (PT_FPR0 + 2*31)
#define PT_FPSCR (PT_FPR0 + 2*32 + 1)

#define sigcontext_struct sigcontext
struct sigcontext {
	unsigned long	_unused[4];
	int		signal;
	unsigned long	handler;
	unsigned long	oldmask;
	struct pt_regs 	*regs;
};