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84778508 BS |
1 | /* |
2 | * Emulation of BSD signals | |
3 | * | |
4 | * Copyright (c) 2003 - 2008 Fabrice Bellard | |
1366ef81 | 5 | * Copyright (c) 2013 Stacey Son |
84778508 BS |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program 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 | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
8167ee88 | 18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
84778508 | 19 | */ |
84778508 | 20 | |
5abfac27 | 21 | #include "qemu/osdep.h" |
84778508 | 22 | #include "qemu.h" |
0ef59989 | 23 | #include "signal-common.h" |
fc9f9bdd | 24 | #include "hw/core/tcg-cpu-ops.h" |
84778508 | 25 | |
835b04ed WL |
26 | /* |
27 | * Stubbed out routines until we merge signal support from bsd-user | |
28 | * fork. | |
29 | */ | |
30 | ||
1366ef81 WL |
31 | /* |
32 | * The BSD ABIs use the same singal numbers across all the CPU architectures, so | |
33 | * (unlike Linux) these functions are just the identity mapping. This might not | |
34 | * be true for XyzBSD running on AbcBSD, which doesn't currently work. | |
35 | */ | |
36 | int host_to_target_signal(int sig) | |
37 | { | |
38 | return sig; | |
39 | } | |
40 | ||
41 | int target_to_host_signal(int sig) | |
42 | { | |
43 | return sig; | |
44 | } | |
45 | ||
5abfac27 WL |
46 | /* |
47 | * Queue a signal so that it will be send to the virtual CPU as soon as | |
48 | * possible. | |
49 | */ | |
50 | void queue_signal(CPUArchState *env, int sig, target_siginfo_t *info) | |
51 | { | |
52 | qemu_log_mask(LOG_UNIMP, "No signal queueing, dropping signal %d\n", sig); | |
53 | } | |
54 | ||
0ef59989 WL |
55 | /* |
56 | * Force a synchronously taken QEMU_SI_FAULT signal. For QEMU the | |
57 | * 'force' part is handled in process_pending_signals(). | |
58 | */ | |
59 | void force_sig_fault(int sig, int code, abi_ulong addr) | |
60 | { | |
61 | CPUState *cpu = thread_cpu; | |
62 | CPUArchState *env = cpu->env_ptr; | |
63 | target_siginfo_t info = {}; | |
64 | ||
65 | info.si_signo = sig; | |
66 | info.si_errno = 0; | |
67 | info.si_code = code; | |
68 | info.si_addr = addr; | |
69 | queue_signal(env, sig, &info); | |
70 | } | |
71 | ||
84778508 BS |
72 | void signal_init(void) |
73 | { | |
74 | } | |
75 | ||
9349b4f9 | 76 | void process_pending_signals(CPUArchState *cpu_env) |
84778508 BS |
77 | { |
78 | } | |
835b04ed WL |
79 | |
80 | void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong addr, | |
81 | MMUAccessType access_type, bool maperr, uintptr_t ra) | |
82 | { | |
fc9f9bdd WL |
83 | const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops; |
84 | ||
85 | if (tcg_ops->record_sigsegv) { | |
86 | tcg_ops->record_sigsegv(cpu, addr, access_type, maperr, ra); | |
87 | } | |
88 | ||
89 | force_sig_fault(TARGET_SIGSEGV, | |
90 | maperr ? TARGET_SEGV_MAPERR : TARGET_SEGV_ACCERR, | |
91 | addr); | |
92 | cpu->exception_index = EXCP_INTERRUPT; | |
93 | cpu_loop_exit_restore(cpu, ra); | |
835b04ed WL |
94 | } |
95 | ||
96 | void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr, | |
97 | MMUAccessType access_type, uintptr_t ra) | |
98 | { | |
cfdee273 WL |
99 | const struct TCGCPUOps *tcg_ops = CPU_GET_CLASS(cpu)->tcg_ops; |
100 | ||
101 | if (tcg_ops->record_sigbus) { | |
102 | tcg_ops->record_sigbus(cpu, addr, access_type, ra); | |
103 | } | |
104 | ||
105 | force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, addr); | |
106 | cpu->exception_index = EXCP_INTERRUPT; | |
107 | cpu_loop_exit_restore(cpu, ra); | |
835b04ed | 108 | } |