ef1412bd84
Implement EXCP_PREFETCH_ABORT AND EXCP_DATA_ABORT. Both of these data exceptions cause a SIGSEGV. Signed-off-by: Kyle Evans <kevans@FreeBSD.org> Signed-off-by: Olivier Houchard <cognet@ci0.org> Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
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* arm cpu init and loop
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*
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* Copyright (c) 2013 Stacey D. Son
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TARGET_ARCH_CPU_H_
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#define _TARGET_ARCH_CPU_H_
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#include "target_arch.h"
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#define TARGET_DEFAULT_CPU_MODEL "any"
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static inline void target_cpu_init(CPUARMState *env,
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struct target_pt_regs *regs)
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{
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int i;
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cpsr_write(env, regs->uregs[16], CPSR_USER | CPSR_EXEC,
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CPSRWriteByInstr);
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for (i = 0; i < 16; i++) {
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env->regs[i] = regs->uregs[i];
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}
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}
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static inline void target_cpu_loop(CPUARMState *env)
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{
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int trapnr;
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target_siginfo_t info;
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CPUState *cs = env_cpu(env);
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for (;;) {
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cpu_exec_start(cs);
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trapnr = cpu_exec(cs);
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cpu_exec_end(cs);
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process_queued_cpu_work(cs);
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switch (trapnr) {
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case EXCP_UDEF:
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{
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/* See arm/arm/undefined.c undefinedinstruction(); */
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info.si_addr = env->regs[15];
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/* illegal instruction */
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info.si_signo = TARGET_SIGILL;
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info.si_errno = 0;
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info.si_code = TARGET_ILL_ILLOPC;
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queue_signal(env, info.si_signo, &info);
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/* TODO: What about instruction emulation? */
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}
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break;
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case EXCP_INTERRUPT:
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/* just indicate that signals should be handled asap */
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break;
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case EXCP_PREFETCH_ABORT:
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/* See arm/arm/trap.c prefetch_abort_handler() */
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case EXCP_DATA_ABORT:
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/* See arm/arm/trap.c data_abort_handler() */
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info.si_signo = TARGET_SIGSEGV;
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info.si_errno = 0;
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/* XXX: check env->error_code */
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info.si_code = 0;
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info.si_addr = env->exception.vaddress;
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queue_signal(env, info.si_signo, &info);
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break;
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case EXCP_DEBUG:
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{
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info.si_signo = TARGET_SIGTRAP;
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info.si_errno = 0;
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info.si_code = TARGET_TRAP_BRKPT;
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info.si_addr = env->exception.vaddress;
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queue_signal(env, info.si_signo, &info);
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}
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break;
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case EXCP_ATOMIC:
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cpu_exec_step_atomic(cs);
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break;
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case EXCP_YIELD:
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/* nothing to do here for user-mode, just resume guest code */
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break;
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default:
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fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
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trapnr);
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cpu_dump_state(cs, stderr, 0);
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abort();
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} /* switch() */
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process_pending_signals(env);
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} /* for (;;) */
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}
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static inline void target_cpu_clone_regs(CPUARMState *env, target_ulong newsp)
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{
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if (newsp) {
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env->regs[13] = newsp;
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}
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env->regs[0] = 0;
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}
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static inline void target_cpu_reset(CPUArchState *cpu)
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{
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}
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#endif /* !_TARGET_ARCH_CPU_H */
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