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
);
33 int trapnr
, signum
, sigcode
;
39 trapnr
= cpu_exec(cs
);
41 process_queued_cpu_work(cs
);
49 /* just indicate that signals should be handled asap */
52 cpu_exec_step_atomic(cs
);
54 case RISCV_EXCP_U_ECALL
:
56 if (env
->gpr
[xA7
] == TARGET_NR_arch_specific_syscall
+ 15) {
57 /* riscv_flush_icache_syscall is a no-op in QEMU as
58 self-modifying code is automatically detected */
62 env
->gpr
[(env
->elf_flags
& EF_RISCV_RVE
)
72 if (ret
== -TARGET_ERESTARTSYS
) {
74 } else if (ret
!= -TARGET_QEMU_ESIGRETURN
) {
77 if (cs
->singlestep_enabled
) {
81 case RISCV_EXCP_ILLEGAL_INST
:
82 signum
= TARGET_SIGILL
;
83 sigcode
= TARGET_ILL_ILLOPC
;
85 case RISCV_EXCP_BREAKPOINT
:
86 signum
= TARGET_SIGTRAP
;
87 sigcode
= TARGET_TRAP_BRKPT
;
90 case RISCV_EXCP_INST_PAGE_FAULT
:
91 case RISCV_EXCP_LOAD_PAGE_FAULT
:
92 case RISCV_EXCP_STORE_PAGE_FAULT
:
93 signum
= TARGET_SIGSEGV
;
94 sigcode
= TARGET_SEGV_MAPERR
;
95 sigaddr
= env
->badaddr
;
97 case RISCV_EXCP_SEMIHOST
:
98 env
->gpr
[xA0
] = do_common_semihosting(cs
);
103 signum
= TARGET_SIGTRAP
;
104 sigcode
= TARGET_TRAP_BRKPT
;
107 EXCP_DUMP(env
, "\nqemu: unhandled CPU exception %#x - aborting\n",
113 target_siginfo_t info
= {
117 ._sifields
._sigfault
._addr
= sigaddr
119 queue_signal(env
, info
.si_signo
, QEMU_SI_FAULT
, &info
);
122 process_pending_signals(env
);
126 void target_cpu_copy_regs(CPUArchState
*env
, struct target_pt_regs
*regs
)
128 CPUState
*cpu
= env_cpu(env
);
129 TaskState
*ts
= cpu
->opaque
;
130 struct image_info
*info
= ts
->info
;
132 env
->pc
= regs
->sepc
;
133 env
->gpr
[xSP
] = regs
->sp
;
134 env
->elf_flags
= info
->elf_flags
;
136 if ((env
->misa
& RVE
) && !(env
->elf_flags
& EF_RISCV_RVE
)) {
137 error_report("Incompatible ELF: RVE cpu requires RVE ABI binary");
141 ts
->stack_base
= info
->start_stack
;
142 ts
->heap_base
= info
->brk
;
143 /* This will be filled in on the first SYS_HEAPINFO call. */