| 1 | /* |
| 2 | * PowerPC MMU stub handling for user mode emulation |
| 3 | * |
| 4 | * Copyright (c) 2003-2007 Jocelyn Mayer |
| 5 | * Copyright (c) 2013 David Gibson, IBM Corporation. |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "accel/tcg/cpu-loop.h" |
| 23 | #include "cpu.h" |
| 24 | #include "internal.h" |
| 25 | |
| 26 | void ppc_cpu_record_sigsegv(CPUState *cs, vaddr address, |
| 27 | MMUAccessType access_type, |
| 28 | bool maperr, uintptr_t retaddr) |
| 29 | { |
| 30 | CPUPPCState *env = cpu_env(cs); |
| 31 | int exception, error_code; |
| 32 | |
| 33 | /* |
| 34 | * Both DSISR and the "trap number" (exception vector offset, |
| 35 | * looked up from exception_index) are present in the linux-user |
| 36 | * signal frame. |
| 37 | * FIXME: we don't actually populate the trap number properly. |
| 38 | * It would be easiest to fill in an env->trap value now. |
| 39 | */ |
| 40 | if (access_type == MMU_INST_FETCH) { |
| 41 | exception = POWERPC_EXCP_ISI; |
| 42 | error_code = 0x40000000; |
| 43 | } else { |
| 44 | exception = POWERPC_EXCP_DSI; |
| 45 | error_code = 0x40000000; |
| 46 | if (access_type == MMU_DATA_STORE) { |
| 47 | error_code |= 0x02000000; |
| 48 | } |
| 49 | env->spr[SPR_DAR] = address; |
| 50 | env->spr[SPR_DSISR] = error_code; |
| 51 | } |
| 52 | cs->exception_index = exception; |
| 53 | env->error_code = error_code; |
| 54 | cpu_loop_exit_restore(cs, retaddr); |
| 55 | } |