Merge tag 'for-upstream' of git://repo.or.cz/qemu/kevin into staging
[qemu.git] / target / ppc / user_only_helper.c
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 "cpu.h"
23 #include "exec/exec-all.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 PowerPCCPU *cpu = POWERPC_CPU(cs);
31 CPUPPCState *env = &cpu->env;
32 int exception, error_code;
33
34 /*
35 * Both DSISR and the "trap number" (exception vector offset,
36 * looked up from exception_index) are present in the linux-user
37 * signal frame.
38 * FIXME: we don't actually populate the trap number properly.
39 * It would be easiest to fill in an env->trap value now.
40 */
41 if (access_type == MMU_INST_FETCH) {
42 exception = POWERPC_EXCP_ISI;
43 error_code = 0x40000000;
44 } else {
45 exception = POWERPC_EXCP_DSI;
46 error_code = 0x40000000;
47 if (access_type == MMU_DATA_STORE) {
48 error_code |= 0x02000000;
49 }
50 env->spr[SPR_DAR] = address;
51 env->spr[SPR_DSISR] = error_code;
52 }
53 cs->exception_index = exception;
54 env->error_code = error_code;
55 cpu_loop_exit_restore(cs, retaddr);
56 }