1/*
2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __SYS_SIGCONTEXT_PPC_H
7#define __SYS_SIGCONTEXT_PPC_H
8
9#define DSISR_WRITE 0x02000000
10
11#define SC_FAULT_ADDR(sc) ({ \
12		struct sigcontext *_sc = (sc); \
13		long retval = -1; \
14		switch (_sc->regs->trap) { \
15		case 0x300: \
16			/* data exception */ \
17			retval = _sc->regs->dar; \
18			break; \
19		case 0x400: \
20			/* instruction exception */ \
21			retval = _sc->regs->nip; \
22			break; \
23		default: \
24			panic("SC_FAULT_ADDR: unhandled trap type\n"); \
25		} \
26		retval; \
27	})
28
29#define SC_FAULT_WRITE(sc) ({ \
30		struct sigcontext *_sc = (sc); \
31		long retval = -1; \
32		switch (_sc->regs->trap) { \
33		case 0x300: \
34			/* data exception */ \
35			retval = !!(_sc->regs->dsisr & DSISR_WRITE); \
36			break; \
37		case 0x400: \
38			/* instruction exception: not a write */ \
39			retval = 0; \
40			break; \
41		default: \
42			panic("SC_FAULT_ADDR: unhandled trap type\n"); \
43		} \
44		retval; \
45	})
46
47#define SC_IP(sc) ((sc)->regs->nip)
48#define SC_SP(sc) ((sc)->regs->gpr[1])
49#define SEGV_IS_FIXABLE(sc) (1)
50
51#endif
52
53