Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20211022...
[qemu.git] / linux-user / cris / cpu_loop.c
1 /*
2 * qemu user cpu loop
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "qemu.h"
23 #include "user-internals.h"
24 #include "cpu_loop-common.h"
25 #include "signal-common.h"
26
27 void cpu_loop(CPUCRISState *env)
28 {
29 CPUState *cs = env_cpu(env);
30 int trapnr, ret;
31 target_siginfo_t info;
32
33 while (1) {
34 cpu_exec_start(cs);
35 trapnr = cpu_exec(cs);
36 cpu_exec_end(cs);
37 process_queued_cpu_work(cs);
38
39 switch (trapnr) {
40 case 0xaa:
41 {
42 info.si_signo = TARGET_SIGSEGV;
43 info.si_errno = 0;
44 /* XXX: check env->error_code */
45 info.si_code = TARGET_SEGV_MAPERR;
46 info._sifields._sigfault._addr = env->pregs[PR_EDA];
47 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
48 }
49 break;
50 case EXCP_INTERRUPT:
51 /* just indicate that signals should be handled asap */
52 break;
53 case EXCP_BREAK:
54 ret = do_syscall(env,
55 env->regs[9],
56 env->regs[10],
57 env->regs[11],
58 env->regs[12],
59 env->regs[13],
60 env->pregs[7],
61 env->pregs[11],
62 0, 0);
63 if (ret == -TARGET_ERESTARTSYS) {
64 env->pc -= 2;
65 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
66 env->regs[10] = ret;
67 }
68 break;
69 case EXCP_DEBUG:
70 info.si_signo = TARGET_SIGTRAP;
71 info.si_errno = 0;
72 info.si_code = TARGET_TRAP_BRKPT;
73 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
74 break;
75 case EXCP_ATOMIC:
76 cpu_exec_step_atomic(cs);
77 break;
78 default:
79 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
80 cpu_dump_state(cs, stderr, 0);
81 exit(EXIT_FAILURE);
82 }
83 process_pending_signals (env);
84 }
85 }
86
87 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
88 {
89 CPUState *cpu = env_cpu(env);
90 TaskState *ts = cpu->opaque;
91 struct image_info *info = ts->info;
92
93 env->regs[0] = regs->r0;
94 env->regs[1] = regs->r1;
95 env->regs[2] = regs->r2;
96 env->regs[3] = regs->r3;
97 env->regs[4] = regs->r4;
98 env->regs[5] = regs->r5;
99 env->regs[6] = regs->r6;
100 env->regs[7] = regs->r7;
101 env->regs[8] = regs->r8;
102 env->regs[9] = regs->r9;
103 env->regs[10] = regs->r10;
104 env->regs[11] = regs->r11;
105 env->regs[12] = regs->r12;
106 env->regs[13] = regs->r13;
107 env->regs[14] = info->start_stack;
108 env->regs[15] = regs->acr;
109 env->pc = regs->erp;
110 }