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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" | |
51977e25 | 24 | #include "qemu/guest-random.h" |
6b5fe137 | 25 | #include "semihosting/common-semi.h" |
8db94ab4 | 26 | #include "target/arm/syndrome.h" |
cd71c089 | 27 | |
3c439b17 LV |
28 | #define get_user_code_u32(x, gaddr, env) \ |
29 | ({ abi_long __r = get_user_u32((x), (gaddr)); \ | |
30 | if (!__r && bswap_code(arm_sctlr_b(env))) { \ | |
31 | (x) = bswap32(x); \ | |
32 | } \ | |
33 | __r; \ | |
34 | }) | |
35 | ||
36 | #define get_user_code_u16(x, gaddr, env) \ | |
37 | ({ abi_long __r = get_user_u16((x), (gaddr)); \ | |
38 | if (!__r && bswap_code(arm_sctlr_b(env))) { \ | |
39 | (x) = bswap16(x); \ | |
40 | } \ | |
41 | __r; \ | |
42 | }) | |
43 | ||
44 | #define get_user_data_u32(x, gaddr, env) \ | |
45 | ({ abi_long __r = get_user_u32((x), (gaddr)); \ | |
46 | if (!__r && arm_cpu_bswap_data(env)) { \ | |
47 | (x) = bswap32(x); \ | |
48 | } \ | |
49 | __r; \ | |
50 | }) | |
51 | ||
52 | #define get_user_data_u16(x, gaddr, env) \ | |
53 | ({ abi_long __r = get_user_u16((x), (gaddr)); \ | |
54 | if (!__r && arm_cpu_bswap_data(env)) { \ | |
55 | (x) = bswap16(x); \ | |
56 | } \ | |
57 | __r; \ | |
58 | }) | |
59 | ||
60 | #define put_user_data_u32(x, gaddr, env) \ | |
61 | ({ typeof(x) __x = (x); \ | |
62 | if (arm_cpu_bswap_data(env)) { \ | |
63 | __x = bswap32(__x); \ | |
64 | } \ | |
65 | put_user_u32(__x, (gaddr)); \ | |
66 | }) | |
67 | ||
68 | #define put_user_data_u16(x, gaddr, env) \ | |
69 | ({ typeof(x) __x = (x); \ | |
70 | if (arm_cpu_bswap_data(env)) { \ | |
71 | __x = bswap16(__x); \ | |
72 | } \ | |
73 | put_user_u16(__x, (gaddr)); \ | |
74 | }) | |
75 | ||
76 | /* AArch64 main loop */ | |
77 | void cpu_loop(CPUARMState *env) | |
78 | { | |
2fc0cc0e | 79 | CPUState *cs = env_cpu(env); |
8db94ab4 | 80 | int trapnr, ec, fsc; |
3c439b17 LV |
81 | abi_long ret; |
82 | target_siginfo_t info; | |
83 | ||
84 | for (;;) { | |
85 | cpu_exec_start(cs); | |
86 | trapnr = cpu_exec(cs); | |
87 | cpu_exec_end(cs); | |
88 | process_queued_cpu_work(cs); | |
89 | ||
90 | switch (trapnr) { | |
91 | case EXCP_SWI: | |
92 | ret = do_syscall(env, | |
93 | env->xregs[8], | |
94 | env->xregs[0], | |
95 | env->xregs[1], | |
96 | env->xregs[2], | |
97 | env->xregs[3], | |
98 | env->xregs[4], | |
99 | env->xregs[5], | |
100 | 0, 0); | |
101 | if (ret == -TARGET_ERESTARTSYS) { | |
102 | env->pc -= 4; | |
103 | } else if (ret != -TARGET_QEMU_ESIGRETURN) { | |
104 | env->xregs[0] = ret; | |
105 | } | |
106 | break; | |
107 | case EXCP_INTERRUPT: | |
108 | /* just indicate that signals should be handled asap */ | |
109 | break; | |
110 | case EXCP_UDEF: | |
111 | info.si_signo = TARGET_SIGILL; | |
112 | info.si_errno = 0; | |
113 | info.si_code = TARGET_ILL_ILLOPN; | |
114 | info._sifields._sigfault._addr = env->pc; | |
115 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
116 | break; | |
117 | case EXCP_PREFETCH_ABORT: | |
118 | case EXCP_DATA_ABORT: | |
119 | info.si_signo = TARGET_SIGSEGV; | |
120 | info.si_errno = 0; | |
3c439b17 | 121 | info._sifields._sigfault._addr = env->exception.vaddress; |
8db94ab4 RH |
122 | |
123 | /* We should only arrive here with EC in {DATAABORT, INSNABORT}. */ | |
124 | ec = syn_get_ec(env->exception.syndrome); | |
125 | assert(ec == EC_DATAABORT || ec == EC_INSNABORT); | |
126 | ||
127 | /* Both EC have the same format for FSC, or close enough. */ | |
128 | fsc = extract32(env->exception.syndrome, 0, 6); | |
129 | switch (fsc) { | |
130 | case 0x04 ... 0x07: /* Translation fault, level {0-3} */ | |
131 | info.si_code = TARGET_SEGV_MAPERR; | |
132 | break; | |
133 | case 0x09 ... 0x0b: /* Access flag fault, level {1-3} */ | |
134 | case 0x0d ... 0x0f: /* Permission fault, level {1-3} */ | |
135 | info.si_code = TARGET_SEGV_ACCERR; | |
136 | break; | |
61dbe037 RH |
137 | case 0x11: /* Synchronous Tag Check Fault */ |
138 | info.si_code = TARGET_SEGV_MTESERR; | |
139 | break; | |
8db94ab4 RH |
140 | default: |
141 | g_assert_not_reached(); | |
142 | } | |
143 | ||
3c439b17 LV |
144 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
145 | break; | |
146 | case EXCP_DEBUG: | |
147 | case EXCP_BKPT: | |
b10089a1 PM |
148 | info.si_signo = TARGET_SIGTRAP; |
149 | info.si_errno = 0; | |
150 | info.si_code = TARGET_TRAP_BRKPT; | |
151 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
3c439b17 LV |
152 | break; |
153 | case EXCP_SEMIHOST: | |
0bb446d8 | 154 | env->xregs[0] = do_common_semihosting(cs); |
4ff5ef9e | 155 | env->pc += 4; |
3c439b17 LV |
156 | break; |
157 | case EXCP_YIELD: | |
158 | /* nothing to do here for user-mode, just resume guest code */ | |
159 | break; | |
160 | case EXCP_ATOMIC: | |
161 | cpu_exec_step_atomic(cs); | |
162 | break; | |
163 | default: | |
164 | EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); | |
165 | abort(); | |
166 | } | |
5d70c351 RH |
167 | |
168 | /* Check for MTE asynchronous faults */ | |
169 | if (unlikely(env->cp15.tfsr_el[0])) { | |
170 | env->cp15.tfsr_el[0] = 0; | |
171 | info.si_signo = TARGET_SIGSEGV; | |
172 | info.si_errno = 0; | |
173 | info._sifields._sigfault._addr = 0; | |
174 | info.si_code = TARGET_SEGV_MTEAERR; | |
175 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
176 | } | |
177 | ||
3c439b17 LV |
178 | process_pending_signals(env); |
179 | /* Exception return on AArch64 always clears the exclusive monitor, | |
180 | * so any return to running guest code implies this. | |
181 | */ | |
182 | env->exclusive_addr = -1; | |
183 | } | |
184 | } | |
185 | ||
cd71c089 LV |
186 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
187 | { | |
2fc0cc0e RH |
188 | ARMCPU *cpu = env_archcpu(env); |
189 | CPUState *cs = env_cpu(env); | |
87877543 | 190 | TaskState *ts = cs->opaque; |
3c439b17 LV |
191 | struct image_info *info = ts->info; |
192 | int i; | |
193 | ||
194 | if (!(arm_feature(env, ARM_FEATURE_AARCH64))) { | |
195 | fprintf(stderr, | |
196 | "The selected ARM CPU does not support 64 bit mode\n"); | |
197 | exit(EXIT_FAILURE); | |
198 | } | |
199 | ||
200 | for (i = 0; i < 31; i++) { | |
201 | env->xregs[i] = regs->regs[i]; | |
202 | } | |
203 | env->pc = regs->pc; | |
204 | env->xregs[31] = regs->sp; | |
205 | #ifdef TARGET_WORDS_BIGENDIAN | |
206 | env->cp15.sctlr_el[1] |= SCTLR_E0E; | |
207 | for (i = 1; i < 4; ++i) { | |
208 | env->cp15.sctlr_el[i] |= SCTLR_EE; | |
209 | } | |
62fb8a47 | 210 | arm_rebuild_hflags(env); |
3c439b17 LV |
211 | #endif |
212 | ||
87877543 | 213 | if (cpu_isar_feature(aa64_pauth, cpu)) { |
108b3ba8 | 214 | qemu_guest_getrandom_nofail(&env->keys, sizeof(env->keys)); |
87877543 RH |
215 | } |
216 | ||
3c439b17 LV |
217 | ts->stack_base = info->start_stack; |
218 | ts->heap_base = info->brk; | |
219 | /* This will be filled in on the first SYS_HEAPINFO call. */ | |
220 | ts->heap_limit = 0; | |
cd71c089 | 221 | } |