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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 | 22 | #include "qemu.h" |
3b249d26 | 23 | #include "user-internals.h" |
cd71c089 | 24 | #include "cpu_loop-common.h" |
2113aed6 | 25 | #include "signal-common.h" |
51977e25 | 26 | #include "qemu/guest-random.h" |
6b5fe137 | 27 | #include "semihosting/common-semi.h" |
8db94ab4 | 28 | #include "target/arm/syndrome.h" |
cd71c089 | 29 | |
3c439b17 LV |
30 | #define get_user_code_u32(x, gaddr, env) \ |
31 | ({ abi_long __r = get_user_u32((x), (gaddr)); \ | |
32 | if (!__r && bswap_code(arm_sctlr_b(env))) { \ | |
33 | (x) = bswap32(x); \ | |
34 | } \ | |
35 | __r; \ | |
36 | }) | |
37 | ||
38 | #define get_user_code_u16(x, gaddr, env) \ | |
39 | ({ abi_long __r = get_user_u16((x), (gaddr)); \ | |
40 | if (!__r && bswap_code(arm_sctlr_b(env))) { \ | |
41 | (x) = bswap16(x); \ | |
42 | } \ | |
43 | __r; \ | |
44 | }) | |
45 | ||
46 | #define get_user_data_u32(x, gaddr, env) \ | |
47 | ({ abi_long __r = get_user_u32((x), (gaddr)); \ | |
48 | if (!__r && arm_cpu_bswap_data(env)) { \ | |
49 | (x) = bswap32(x); \ | |
50 | } \ | |
51 | __r; \ | |
52 | }) | |
53 | ||
54 | #define get_user_data_u16(x, gaddr, env) \ | |
55 | ({ abi_long __r = get_user_u16((x), (gaddr)); \ | |
56 | if (!__r && arm_cpu_bswap_data(env)) { \ | |
57 | (x) = bswap16(x); \ | |
58 | } \ | |
59 | __r; \ | |
60 | }) | |
61 | ||
62 | #define put_user_data_u32(x, gaddr, env) \ | |
63 | ({ typeof(x) __x = (x); \ | |
64 | if (arm_cpu_bswap_data(env)) { \ | |
65 | __x = bswap32(__x); \ | |
66 | } \ | |
67 | put_user_u32(__x, (gaddr)); \ | |
68 | }) | |
69 | ||
70 | #define put_user_data_u16(x, gaddr, env) \ | |
71 | ({ typeof(x) __x = (x); \ | |
72 | if (arm_cpu_bswap_data(env)) { \ | |
73 | __x = bswap16(__x); \ | |
74 | } \ | |
75 | put_user_u16(__x, (gaddr)); \ | |
76 | }) | |
77 | ||
78 | /* AArch64 main loop */ | |
79 | void cpu_loop(CPUARMState *env) | |
80 | { | |
2fc0cc0e | 81 | CPUState *cs = env_cpu(env); |
39a099ca | 82 | int trapnr, ec, fsc, si_code, si_signo; |
3c439b17 | 83 | abi_long ret; |
3c439b17 LV |
84 | |
85 | for (;;) { | |
86 | cpu_exec_start(cs); | |
87 | trapnr = cpu_exec(cs); | |
88 | cpu_exec_end(cs); | |
89 | process_queued_cpu_work(cs); | |
90 | ||
91 | switch (trapnr) { | |
92 | case EXCP_SWI: | |
93 | ret = do_syscall(env, | |
94 | env->xregs[8], | |
95 | env->xregs[0], | |
96 | env->xregs[1], | |
97 | env->xregs[2], | |
98 | env->xregs[3], | |
99 | env->xregs[4], | |
100 | env->xregs[5], | |
101 | 0, 0); | |
102 | if (ret == -TARGET_ERESTARTSYS) { | |
103 | env->pc -= 4; | |
104 | } else if (ret != -TARGET_QEMU_ESIGRETURN) { | |
105 | env->xregs[0] = ret; | |
106 | } | |
107 | break; | |
108 | case EXCP_INTERRUPT: | |
109 | /* just indicate that signals should be handled asap */ | |
110 | break; | |
111 | case EXCP_UDEF: | |
fce9608d | 112 | force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->pc); |
3c439b17 LV |
113 | break; |
114 | case EXCP_PREFETCH_ABORT: | |
115 | case EXCP_DATA_ABORT: | |
8db94ab4 RH |
116 | /* We should only arrive here with EC in {DATAABORT, INSNABORT}. */ |
117 | ec = syn_get_ec(env->exception.syndrome); | |
118 | assert(ec == EC_DATAABORT || ec == EC_INSNABORT); | |
119 | ||
120 | /* Both EC have the same format for FSC, or close enough. */ | |
121 | fsc = extract32(env->exception.syndrome, 0, 6); | |
122 | switch (fsc) { | |
123 | case 0x04 ... 0x07: /* Translation fault, level {0-3} */ | |
39a099ca | 124 | si_signo = TARGET_SIGSEGV; |
fce9608d | 125 | si_code = TARGET_SEGV_MAPERR; |
8db94ab4 RH |
126 | break; |
127 | case 0x09 ... 0x0b: /* Access flag fault, level {1-3} */ | |
128 | case 0x0d ... 0x0f: /* Permission fault, level {1-3} */ | |
39a099ca | 129 | si_signo = TARGET_SIGSEGV; |
fce9608d | 130 | si_code = TARGET_SEGV_ACCERR; |
8db94ab4 | 131 | break; |
61dbe037 | 132 | case 0x11: /* Synchronous Tag Check Fault */ |
39a099ca | 133 | si_signo = TARGET_SIGSEGV; |
fce9608d | 134 | si_code = TARGET_SEGV_MTESERR; |
61dbe037 | 135 | break; |
39a099ca RH |
136 | case 0x21: /* Alignment fault */ |
137 | si_signo = TARGET_SIGBUS; | |
138 | si_code = TARGET_BUS_ADRALN; | |
139 | break; | |
8db94ab4 RH |
140 | default: |
141 | g_assert_not_reached(); | |
142 | } | |
39a099ca | 143 | force_sig_fault(si_signo, si_code, env->exception.vaddress); |
3c439b17 LV |
144 | break; |
145 | case EXCP_DEBUG: | |
146 | case EXCP_BKPT: | |
fce9608d | 147 | force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); |
3c439b17 LV |
148 | break; |
149 | case EXCP_SEMIHOST: | |
0bb446d8 | 150 | env->xregs[0] = do_common_semihosting(cs); |
4ff5ef9e | 151 | env->pc += 4; |
3c439b17 LV |
152 | break; |
153 | case EXCP_YIELD: | |
154 | /* nothing to do here for user-mode, just resume guest code */ | |
155 | break; | |
156 | case EXCP_ATOMIC: | |
157 | cpu_exec_step_atomic(cs); | |
158 | break; | |
159 | default: | |
160 | EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); | |
161 | abort(); | |
162 | } | |
5d70c351 RH |
163 | |
164 | /* Check for MTE asynchronous faults */ | |
165 | if (unlikely(env->cp15.tfsr_el[0])) { | |
166 | env->cp15.tfsr_el[0] = 0; | |
fce9608d | 167 | force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MTEAERR, 0); |
5d70c351 RH |
168 | } |
169 | ||
3c439b17 LV |
170 | process_pending_signals(env); |
171 | /* Exception return on AArch64 always clears the exclusive monitor, | |
172 | * so any return to running guest code implies this. | |
173 | */ | |
174 | env->exclusive_addr = -1; | |
175 | } | |
176 | } | |
177 | ||
cd71c089 LV |
178 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
179 | { | |
2fc0cc0e RH |
180 | ARMCPU *cpu = env_archcpu(env); |
181 | CPUState *cs = env_cpu(env); | |
87877543 | 182 | TaskState *ts = cs->opaque; |
3c439b17 LV |
183 | struct image_info *info = ts->info; |
184 | int i; | |
185 | ||
186 | if (!(arm_feature(env, ARM_FEATURE_AARCH64))) { | |
187 | fprintf(stderr, | |
188 | "The selected ARM CPU does not support 64 bit mode\n"); | |
189 | exit(EXIT_FAILURE); | |
190 | } | |
191 | ||
192 | for (i = 0; i < 31; i++) { | |
193 | env->xregs[i] = regs->regs[i]; | |
194 | } | |
195 | env->pc = regs->pc; | |
196 | env->xregs[31] = regs->sp; | |
197 | #ifdef TARGET_WORDS_BIGENDIAN | |
198 | env->cp15.sctlr_el[1] |= SCTLR_E0E; | |
199 | for (i = 1; i < 4; ++i) { | |
200 | env->cp15.sctlr_el[i] |= SCTLR_EE; | |
201 | } | |
62fb8a47 | 202 | arm_rebuild_hflags(env); |
3c439b17 LV |
203 | #endif |
204 | ||
87877543 | 205 | if (cpu_isar_feature(aa64_pauth, cpu)) { |
108b3ba8 | 206 | qemu_guest_getrandom_nofail(&env->keys, sizeof(env->keys)); |
87877543 RH |
207 | } |
208 | ||
3c439b17 LV |
209 | ts->stack_base = info->start_stack; |
210 | ts->heap_base = info->brk; | |
211 | /* This will be filled in on the first SYS_HEAPINFO call. */ | |
212 | ts->heap_limit = 0; | |
cd71c089 | 213 | } |