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-common.h"
22 #include "qemu/error-report.h"
24 #include "user-internals.h"
25 #include "cpu_loop-common.h"
26 #include "signal-common.h"
28 #include "semihosting/common-semi.h"
30 void cpu_loop(CPURISCVState
*env
)
32 CPUState
*cs
= env_cpu(env
);
38 trapnr
= cpu_exec(cs
);
40 process_queued_cpu_work(cs
);
44 /* just indicate that signals should be handled asap */
47 cpu_exec_step_atomic(cs
);
49 case RISCV_EXCP_U_ECALL
:
51 if (env
->gpr
[xA7
] == TARGET_NR_arch_specific_syscall
+ 15) {
52 /* riscv_flush_icache_syscall is a no-op in QEMU as
53 self-modifying code is automatically detected */
57 env
->gpr
[(env
->elf_flags
& EF_RISCV_RVE
)
67 if (ret
== -QEMU_ERESTARTSYS
) {
69 } else if (ret
!= -QEMU_ESIGRETURN
) {
72 if (cs
->singlestep_enabled
) {
76 case RISCV_EXCP_ILLEGAL_INST
:
77 force_sig_fault(TARGET_SIGILL
, TARGET_ILL_ILLOPC
, env
->pc
);
79 case RISCV_EXCP_BREAKPOINT
:
82 force_sig_fault(TARGET_SIGTRAP
, TARGET_TRAP_BRKPT
, env
->pc
);
84 case RISCV_EXCP_SEMIHOST
:
85 env
->gpr
[xA0
] = do_common_semihosting(cs
);
89 EXCP_DUMP(env
, "\nqemu: unhandled CPU exception %#x - aborting\n",
94 process_pending_signals(env
);
98 void target_cpu_copy_regs(CPUArchState
*env
, struct target_pt_regs
*regs
)
100 CPUState
*cpu
= env_cpu(env
);
101 TaskState
*ts
= cpu
->opaque
;
102 struct image_info
*info
= ts
->info
;
104 env
->pc
= regs
->sepc
;
105 env
->gpr
[xSP
] = regs
->sp
;
106 env
->elf_flags
= info
->elf_flags
;
108 if ((env
->misa_ext
& RVE
) && !(env
->elf_flags
& EF_RISCV_RVE
)) {
109 error_report("Incompatible ELF: RVE cpu requires RVE ABI binary");
113 ts
->stack_base
= info
->start_stack
;
114 ts
->heap_base
= info
->brk
;
115 /* This will be filled in on the first SYS_HEAPINFO call. */