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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" | |
21 | #include "qemu.h" | |
3b249d26 | 22 | #include "user-internals.h" |
cd71c089 | 23 | #include "cpu_loop-common.h" |
2113aed6 | 24 | #include "signal-common.h" |
cd71c089 | 25 | |
1d8d0b4e LV |
26 | static abi_ulong hppa_lws(CPUHPPAState *env) |
27 | { | |
3e8f1628 | 28 | CPUState *cs = env_cpu(env); |
1d8d0b4e LV |
29 | uint32_t which = env->gr[20]; |
30 | abi_ulong addr = env->gr[26]; | |
31 | abi_ulong old = env->gr[25]; | |
32 | abi_ulong new = env->gr[24]; | |
33 | abi_ulong size, ret; | |
34 | ||
35 | switch (which) { | |
36 | default: | |
37 | return -TARGET_ENOSYS; | |
38 | ||
39 | case 0: /* elf32 atomic 32bit cmpxchg */ | |
c7169b02 | 40 | if ((addr & 3) || !access_ok(cs, VERIFY_WRITE, addr, 4)) { |
1d8d0b4e LV |
41 | return -TARGET_EFAULT; |
42 | } | |
43 | old = tswap32(old); | |
44 | new = tswap32(new); | |
3e8f1628 | 45 | ret = qatomic_cmpxchg((uint32_t *)g2h(cs, addr), old, new); |
1d8d0b4e LV |
46 | ret = tswap32(ret); |
47 | break; | |
48 | ||
49 | case 2: /* elf32 atomic "new" cmpxchg */ | |
50 | size = env->gr[23]; | |
51 | if (size >= 4) { | |
52 | return -TARGET_ENOSYS; | |
53 | } | |
54 | if (((addr | old | new) & ((1 << size) - 1)) | |
c7169b02 RH |
55 | || !access_ok(cs, VERIFY_WRITE, addr, 1 << size) |
56 | || !access_ok(cs, VERIFY_READ, old, 1 << size) | |
57 | || !access_ok(cs, VERIFY_READ, new, 1 << size)) { | |
1d8d0b4e LV |
58 | return -TARGET_EFAULT; |
59 | } | |
60 | /* Note that below we use host-endian loads so that the cmpxchg | |
61 | can be host-endian as well. */ | |
62 | switch (size) { | |
63 | case 0: | |
3e8f1628 RH |
64 | old = *(uint8_t *)g2h(cs, old); |
65 | new = *(uint8_t *)g2h(cs, new); | |
66 | ret = qatomic_cmpxchg((uint8_t *)g2h(cs, addr), old, new); | |
1d8d0b4e LV |
67 | ret = ret != old; |
68 | break; | |
69 | case 1: | |
3e8f1628 RH |
70 | old = *(uint16_t *)g2h(cs, old); |
71 | new = *(uint16_t *)g2h(cs, new); | |
72 | ret = qatomic_cmpxchg((uint16_t *)g2h(cs, addr), old, new); | |
1d8d0b4e LV |
73 | ret = ret != old; |
74 | break; | |
75 | case 2: | |
3e8f1628 RH |
76 | old = *(uint32_t *)g2h(cs, old); |
77 | new = *(uint32_t *)g2h(cs, new); | |
78 | ret = qatomic_cmpxchg((uint32_t *)g2h(cs, addr), old, new); | |
1d8d0b4e LV |
79 | ret = ret != old; |
80 | break; | |
81 | case 3: | |
82 | { | |
83 | uint64_t o64, n64, r64; | |
3e8f1628 RH |
84 | o64 = *(uint64_t *)g2h(cs, old); |
85 | n64 = *(uint64_t *)g2h(cs, new); | |
1d8d0b4e | 86 | #ifdef CONFIG_ATOMIC64 |
9ef0c6d6 | 87 | r64 = qatomic_cmpxchg__nocheck((aligned_uint64_t *)g2h(cs, addr), |
d73415a3 | 88 | o64, n64); |
1d8d0b4e LV |
89 | ret = r64 != o64; |
90 | #else | |
91 | start_exclusive(); | |
3e8f1628 | 92 | r64 = *(uint64_t *)g2h(cs, addr); |
1d8d0b4e LV |
93 | ret = 1; |
94 | if (r64 == o64) { | |
3e8f1628 | 95 | *(uint64_t *)g2h(cs, addr) = n64; |
1d8d0b4e LV |
96 | ret = 0; |
97 | } | |
98 | end_exclusive(); | |
99 | #endif | |
100 | } | |
101 | break; | |
102 | } | |
103 | break; | |
104 | } | |
105 | ||
106 | env->gr[28] = ret; | |
107 | return 0; | |
108 | } | |
109 | ||
110 | void cpu_loop(CPUHPPAState *env) | |
111 | { | |
25f32708 | 112 | CPUState *cs = env_cpu(env); |
1d8d0b4e LV |
113 | target_siginfo_t info; |
114 | abi_ulong ret; | |
115 | int trapnr; | |
116 | ||
117 | while (1) { | |
118 | cpu_exec_start(cs); | |
119 | trapnr = cpu_exec(cs); | |
120 | cpu_exec_end(cs); | |
121 | process_queued_cpu_work(cs); | |
122 | ||
123 | switch (trapnr) { | |
124 | case EXCP_SYSCALL: | |
125 | ret = do_syscall(env, env->gr[20], | |
126 | env->gr[26], env->gr[25], | |
127 | env->gr[24], env->gr[23], | |
128 | env->gr[22], env->gr[21], 0, 0); | |
129 | switch (ret) { | |
130 | default: | |
131 | env->gr[28] = ret; | |
132 | /* We arrived here by faking the gateway page. Return. */ | |
133 | env->iaoq_f = env->gr[31]; | |
134 | env->iaoq_b = env->gr[31] + 4; | |
135 | break; | |
af254a27 | 136 | case -QEMU_ERESTARTSYS: |
1d8d0b4e LV |
137 | case -TARGET_QEMU_ESIGRETURN: |
138 | break; | |
139 | } | |
140 | break; | |
141 | case EXCP_SYSCALL_LWS: | |
142 | env->gr[21] = hppa_lws(env); | |
143 | /* We arrived here by faking the gateway page. Return. */ | |
144 | env->iaoq_f = env->gr[31]; | |
145 | env->iaoq_b = env->gr[31] + 4; | |
146 | break; | |
1d8d0b4e LV |
147 | case EXCP_ILL: |
148 | case EXCP_PRIV_OPR: | |
149 | case EXCP_PRIV_REG: | |
150 | info.si_signo = TARGET_SIGILL; | |
151 | info.si_errno = 0; | |
152 | info.si_code = TARGET_ILL_ILLOPN; | |
153 | info._sifields._sigfault._addr = env->iaoq_f; | |
154 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
155 | break; | |
156 | case EXCP_OVERFLOW: | |
157 | case EXCP_COND: | |
158 | case EXCP_ASSIST: | |
159 | info.si_signo = TARGET_SIGFPE; | |
160 | info.si_errno = 0; | |
161 | info.si_code = 0; | |
162 | info._sifields._sigfault._addr = env->iaoq_f; | |
163 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
164 | break; | |
165 | case EXCP_DEBUG: | |
b10089a1 PM |
166 | info.si_signo = TARGET_SIGTRAP; |
167 | info.si_errno = 0; | |
168 | info.si_code = TARGET_TRAP_BRKPT; | |
169 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
1d8d0b4e LV |
170 | break; |
171 | case EXCP_INTERRUPT: | |
172 | /* just indicate that signals should be handled asap */ | |
173 | break; | |
174 | default: | |
175 | g_assert_not_reached(); | |
176 | } | |
177 | process_pending_signals(env); | |
178 | } | |
179 | } | |
180 | ||
cd71c089 LV |
181 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
182 | { | |
1d8d0b4e LV |
183 | int i; |
184 | for (i = 1; i < 32; i++) { | |
185 | env->gr[i] = regs->gr[i]; | |
186 | } | |
187 | env->iaoq_f = regs->iaoq[0]; | |
188 | env->iaoq_b = regs->iaoq[1]; | |
cd71c089 | 189 | } |