4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
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.
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/>.
20 #include "qemu/osdep.h"
21 #include "qemu/error-report.h"
23 #include "user-internals.h"
24 #include "cpu_loop-common.h"
25 #include "signal-common.h"
27 #include "semihosting/common-semi.h"
29 void cpu_loop(CPURISCVState
*env
)
31 CPUState
*cs
= env_cpu(env
);
37 trapnr
= cpu_exec(cs
);
39 process_queued_cpu_work(cs
);
43 /* just indicate that signals should be handled asap */
46 cpu_exec_step_atomic(cs
);
48 case RISCV_EXCP_U_ECALL
:
50 if (env
->gpr
[xA7
] == TARGET_NR_arch_specific_syscall
+ 15) {
51 /* riscv_flush_icache_syscall is a no-op in QEMU as
52 self-modifying code is automatically detected */
56 env
->gpr
[(env
->elf_flags
& EF_RISCV_RVE
)
66 if (ret
== -QEMU_ERESTARTSYS
) {
68 } else if (ret
!= -QEMU_ESIGRETURN
) {
71 if (cs
->singlestep_enabled
) {
75 case RISCV_EXCP_ILLEGAL_INST
:
76 force_sig_fault(TARGET_SIGILL
, TARGET_ILL_ILLOPC
, env
->pc
);
78 case RISCV_EXCP_BREAKPOINT
:
81 force_sig_fault(TARGET_SIGTRAP
, TARGET_TRAP_BRKPT
, env
->pc
);
83 case RISCV_EXCP_SEMIHOST
:
84 do_common_semihosting(cs
);
88 EXCP_DUMP(env
, "\nqemu: unhandled CPU exception %#x - aborting\n",
93 process_pending_signals(env
);
97 void target_cpu_copy_regs(CPUArchState
*env
, struct target_pt_regs
*regs
)
99 CPUState
*cpu
= env_cpu(env
);
100 TaskState
*ts
= cpu
->opaque
;
101 struct image_info
*info
= ts
->info
;
103 env
->pc
= regs
->sepc
;
104 env
->gpr
[xSP
] = regs
->sp
;
105 env
->elf_flags
= info
->elf_flags
;
107 if ((env
->misa_ext
& RVE
) && !(env
->elf_flags
& EF_RISCV_RVE
)) {
108 error_report("Incompatible ELF: RVE cpu requires RVE ABI binary");
112 ts
->stack_base
= info
->start_stack
;
113 ts
->heap_base
= info
->brk
;
114 /* This will be filled in on the first SYS_HEAPINFO call. */