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cd71c089 LV |
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" | |
a8d25326 | 21 | #include "qemu-common.h" |
cd71c089 LV |
22 | #include "qemu.h" |
23 | #include "cpu_loop-common.h" | |
2113aed6 | 24 | #include "signal-common.h" |
cd71c089 | 25 | |
82e8e645 LV |
26 | void cpu_loop(CPUMBState *env) |
27 | { | |
f5c7e93a | 28 | CPUState *cs = env_cpu(env); |
82e8e645 LV |
29 | int trapnr, ret; |
30 | target_siginfo_t info; | |
31 | ||
32 | while (1) { | |
33 | cpu_exec_start(cs); | |
34 | trapnr = cpu_exec(cs); | |
35 | cpu_exec_end(cs); | |
36 | process_queued_cpu_work(cs); | |
37 | ||
38 | switch (trapnr) { | |
39 | case 0xaa: | |
40 | { | |
41 | info.si_signo = TARGET_SIGSEGV; | |
42 | info.si_errno = 0; | |
43 | /* XXX: check env->error_code */ | |
44 | info.si_code = TARGET_SEGV_MAPERR; | |
45 | info._sifields._sigfault._addr = 0; | |
46 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
47 | } | |
48 | break; | |
49 | case EXCP_INTERRUPT: | |
50 | /* just indicate that signals should be handled asap */ | |
51 | break; | |
f5235314 | 52 | case EXCP_SYSCALL: |
82e8e645 LV |
53 | /* Return address is 4 bytes after the call. */ |
54 | env->regs[14] += 4; | |
76e8187d | 55 | env->pc = env->regs[14]; |
82e8e645 LV |
56 | ret = do_syscall(env, |
57 | env->regs[12], | |
58 | env->regs[5], | |
59 | env->regs[6], | |
60 | env->regs[7], | |
61 | env->regs[8], | |
62 | env->regs[9], | |
63 | env->regs[10], | |
64 | 0, 0); | |
65 | if (ret == -TARGET_ERESTARTSYS) { | |
66 | /* Wind back to before the syscall. */ | |
76e8187d | 67 | env->pc -= 4; |
82e8e645 LV |
68 | } else if (ret != -TARGET_QEMU_ESIGRETURN) { |
69 | env->regs[3] = ret; | |
70 | } | |
71 | /* All syscall exits result in guest r14 being equal to the | |
72 | * PC we return to, because the kernel syscall exit "rtbd" does | |
73 | * this. (This is true even for sigreturn(); note that r14 is | |
74 | * not a userspace-usable register, as the kernel may clobber it | |
75 | * at any point.) | |
76 | */ | |
76e8187d | 77 | env->regs[14] = env->pc; |
82e8e645 LV |
78 | break; |
79 | case EXCP_HW_EXCP: | |
76e8187d | 80 | env->regs[17] = env->pc + 4; |
82e8e645 | 81 | if (env->iflags & D_FLAG) { |
78e9caf2 | 82 | env->esr |= 1 << 12; |
76e8187d | 83 | env->pc -= 4; |
82e8e645 LV |
84 | /* FIXME: if branch was immed, replay the imm as well. */ |
85 | } | |
86 | ||
87 | env->iflags &= ~(IMM_FLAG | D_FLAG); | |
88 | ||
78e9caf2 | 89 | switch (env->esr & 31) { |
82e8e645 LV |
90 | case ESR_EC_DIVZERO: |
91 | info.si_signo = TARGET_SIGFPE; | |
92 | info.si_errno = 0; | |
93 | info.si_code = TARGET_FPE_FLTDIV; | |
94 | info._sifields._sigfault._addr = 0; | |
95 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
96 | break; | |
97 | case ESR_EC_FPU: | |
98 | info.si_signo = TARGET_SIGFPE; | |
99 | info.si_errno = 0; | |
5a8e0136 | 100 | if (env->fsr & FSR_IO) { |
82e8e645 LV |
101 | info.si_code = TARGET_FPE_FLTINV; |
102 | } | |
5a8e0136 | 103 | if (env->fsr & FSR_DZ) { |
82e8e645 LV |
104 | info.si_code = TARGET_FPE_FLTDIV; |
105 | } | |
106 | info._sifields._sigfault._addr = 0; | |
107 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
108 | break; | |
109 | default: | |
6efd5599 | 110 | fprintf(stderr, "Unhandled hw-exception: 0x%x\n", |
78e9caf2 | 111 | env->esr & ESR_EC_MASK); |
90c84c56 | 112 | cpu_dump_state(cs, stderr, 0); |
82e8e645 LV |
113 | exit(EXIT_FAILURE); |
114 | break; | |
115 | } | |
116 | break; | |
117 | case EXCP_DEBUG: | |
b10089a1 PM |
118 | info.si_signo = TARGET_SIGTRAP; |
119 | info.si_errno = 0; | |
120 | info.si_code = TARGET_TRAP_BRKPT; | |
121 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
82e8e645 LV |
122 | break; |
123 | case EXCP_ATOMIC: | |
124 | cpu_exec_step_atomic(cs); | |
125 | break; | |
126 | default: | |
84ca4fa9 | 127 | fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); |
90c84c56 | 128 | cpu_dump_state(cs, stderr, 0); |
82e8e645 LV |
129 | exit(EXIT_FAILURE); |
130 | } | |
131 | process_pending_signals (env); | |
132 | } | |
133 | } | |
134 | ||
cd71c089 LV |
135 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
136 | { | |
82e8e645 LV |
137 | env->regs[0] = regs->r0; |
138 | env->regs[1] = regs->r1; | |
139 | env->regs[2] = regs->r2; | |
140 | env->regs[3] = regs->r3; | |
141 | env->regs[4] = regs->r4; | |
142 | env->regs[5] = regs->r5; | |
143 | env->regs[6] = regs->r6; | |
144 | env->regs[7] = regs->r7; | |
145 | env->regs[8] = regs->r8; | |
146 | env->regs[9] = regs->r9; | |
147 | env->regs[10] = regs->r10; | |
148 | env->regs[11] = regs->r11; | |
149 | env->regs[12] = regs->r12; | |
150 | env->regs[13] = regs->r13; | |
151 | env->regs[14] = regs->r14; | |
152 | env->regs[15] = regs->r15; | |
153 | env->regs[16] = regs->r16; | |
154 | env->regs[17] = regs->r17; | |
155 | env->regs[18] = regs->r18; | |
156 | env->regs[19] = regs->r19; | |
157 | env->regs[20] = regs->r20; | |
158 | env->regs[21] = regs->r21; | |
159 | env->regs[22] = regs->r22; | |
160 | env->regs[23] = regs->r23; | |
161 | env->regs[24] = regs->r24; | |
162 | env->regs[25] = regs->r25; | |
163 | env->regs[26] = regs->r26; | |
164 | env->regs[27] = regs->r27; | |
165 | env->regs[28] = regs->r28; | |
166 | env->regs[29] = regs->r29; | |
167 | env->regs[30] = regs->r30; | |
168 | env->regs[31] = regs->r31; | |
76e8187d | 169 | env->pc = regs->pc; |
cd71c089 | 170 | } |