4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
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.
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/>.
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
23 #include "cpu_loop-common.h"
25 /* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */
26 #define S390X_FAIL_ADDR_MASK -4096LL
28 void cpu_loop(CPUS390XState *env)
30 CPUState *cs = env_cpu(env);
32 target_siginfo_t info;
38 trapnr = cpu_exec(cs);
40 process_queued_cpu_work(cs);
44 /* Just indicate that signals should be handled asap. */
48 n = env->int_svc_code;
53 env->psw.addr += env->int_svc_ilen;
54 ret = do_syscall(env, n, env->regs[2], env->regs[3],
55 env->regs[4], env->regs[5],
56 env->regs[6], env->regs[7], 0, 0);
57 if (ret == -TARGET_ERESTARTSYS) {
58 env->psw.addr -= env->int_svc_ilen;
59 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
66 n = TARGET_TRAP_BRKPT;
69 n = env->int_pgm_code;
74 n = TARGET_ILL_ILLOPC;
79 /* XXX: check env->error_code */
80 n = TARGET_SEGV_MAPERR;
81 addr = env->__excp_addr & S390X_FAIL_ADDR_MASK;
84 case PGM_SPECIFICATION:
89 n = TARGET_ILL_ILLOPN;
92 case PGM_FIXPT_OVERFLOW:
94 n = TARGET_FPE_INTOVF;
96 case PGM_FIXPT_DIVIDE:
98 n = TARGET_FPE_INTDIV;
102 n = (env->fpc >> 8) & 0xff;
104 /* compare-and-trap */
107 /* An IEEE exception, simulated or otherwise. */
109 n = TARGET_FPE_FLTINV;
110 } else if (n & 0x40) {
111 n = TARGET_FPE_FLTDIV;
112 } else if (n & 0x20) {
113 n = TARGET_FPE_FLTOVF;
114 } else if (n & 0x10) {
115 n = TARGET_FPE_FLTUND;
116 } else if (n & 0x08) {
117 n = TARGET_FPE_FLTRES;
119 /* ??? Quantum exception; BFP, DFP error. */
127 fprintf(stderr, "Unhandled program exception: %#x\n", n);
128 cpu_dump_state(cs, stderr, 0);
134 addr = env->psw.addr;
139 info._sifields._sigfault._addr = addr;
140 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
144 cpu_exec_step_atomic(cs);
147 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
148 cpu_dump_state(cs, stderr, 0);
151 process_pending_signals (env);
155 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
158 for (i = 0; i < 16; i++) {
159 env->regs[i] = regs->gprs[i];
161 env->psw.mask = regs->psw.mask;
162 env->psw.addr = regs->psw.addr;