linux-user: Add support for btrfs ioctls used to manage quota
[qemu.git] / linux-user / s390x / 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 "cpu_loop-common.h"
24
25 /* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */
26 #define S390X_FAIL_ADDR_MASK -4096LL
27
28 void cpu_loop(CPUS390XState *env)
29 {
30 CPUState *cs = env_cpu(env);
31 int trapnr, n, sig;
32 target_siginfo_t info;
33 target_ulong addr;
34 abi_long ret;
35
36 while (1) {
37 cpu_exec_start(cs);
38 trapnr = cpu_exec(cs);
39 cpu_exec_end(cs);
40 process_queued_cpu_work(cs);
41
42 switch (trapnr) {
43 case EXCP_INTERRUPT:
44 /* Just indicate that signals should be handled asap. */
45 break;
46
47 case EXCP_SVC:
48 n = env->int_svc_code;
49 if (!n) {
50 /* syscalls > 255 */
51 n = env->regs[1];
52 }
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) {
60 env->regs[2] = ret;
61 }
62 break;
63
64 case EXCP_DEBUG:
65 sig = TARGET_SIGTRAP;
66 n = TARGET_TRAP_BRKPT;
67 goto do_signal_pc;
68 case EXCP_PGM:
69 n = env->int_pgm_code;
70 switch (n) {
71 case PGM_OPERATION:
72 case PGM_PRIVILEGED:
73 sig = TARGET_SIGILL;
74 n = TARGET_ILL_ILLOPC;
75 goto do_signal_pc;
76 case PGM_PROTECTION:
77 case PGM_ADDRESSING:
78 sig = TARGET_SIGSEGV;
79 /* XXX: check env->error_code */
80 n = TARGET_SEGV_MAPERR;
81 addr = env->__excp_addr & S390X_FAIL_ADDR_MASK;
82 goto do_signal;
83 case PGM_EXECUTE:
84 case PGM_SPECIFICATION:
85 case PGM_SPECIAL_OP:
86 case PGM_OPERAND:
87 do_sigill_opn:
88 sig = TARGET_SIGILL;
89 n = TARGET_ILL_ILLOPN;
90 goto do_signal_pc;
91
92 case PGM_FIXPT_OVERFLOW:
93 sig = TARGET_SIGFPE;
94 n = TARGET_FPE_INTOVF;
95 goto do_signal_pc;
96 case PGM_FIXPT_DIVIDE:
97 sig = TARGET_SIGFPE;
98 n = TARGET_FPE_INTDIV;
99 goto do_signal_pc;
100
101 case PGM_DATA:
102 n = (env->fpc >> 8) & 0xff;
103 if (n == 0xff) {
104 /* compare-and-trap */
105 goto do_sigill_opn;
106 } else {
107 /* An IEEE exception, simulated or otherwise. */
108 if (n & 0x80) {
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;
118 } else {
119 /* ??? Quantum exception; BFP, DFP error. */
120 goto do_sigill_opn;
121 }
122 sig = TARGET_SIGFPE;
123 goto do_signal_pc;
124 }
125
126 default:
127 fprintf(stderr, "Unhandled program exception: %#x\n", n);
128 cpu_dump_state(cs, stderr, 0);
129 exit(EXIT_FAILURE);
130 }
131 break;
132
133 do_signal_pc:
134 addr = env->psw.addr;
135 do_signal:
136 info.si_signo = sig;
137 info.si_errno = 0;
138 info.si_code = n;
139 info._sifields._sigfault._addr = addr;
140 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
141 break;
142
143 case EXCP_ATOMIC:
144 cpu_exec_step_atomic(cs);
145 break;
146 default:
147 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
148 cpu_dump_state(cs, stderr, 0);
149 exit(EXIT_FAILURE);
150 }
151 process_pending_signals (env);
152 }
153 }
154
155 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
156 {
157 int i;
158 for (i = 0; i < 16; i++) {
159 env->regs[i] = regs->gprs[i];
160 }
161 env->psw.mask = regs->psw.mask;
162 env->psw.addr = regs->psw.addr;
163 }