| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | /* |
| 54 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 55 | * Emacs will notice this stuff at the end of the file and automatically |
| 56 | * adjust the settings for this buffer only. This must remain at the end |
| 57 | * of the file. |
| 58 | * --------------------------------------------------------------------------- |
| 59 | * Local variables: |
| 60 | * c-file-style: "linux" |
| 61 | * End: |
| 62 | */ |