136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/*
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* qemu user cpu loop
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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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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#include "qemu/osdep.h"
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#include "qemu/help-texts.h"
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#include "qemu.h"
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#include "user-internals.h"
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#include "signal-common.h"
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#include "user-mmap.h"
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#include "cpu_loop-common.h"
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void helper_return(CPUE2KState *env);
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void cpu_loop(CPUE2KState *env)
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{
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CPUState *cs = env_cpu(env);
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int trapnr;
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target_siginfo_t info;
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while (1) {
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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 E2K_EXCP_SYSCALL: {
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abi_long args[10] = { 0 };
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int psize = env->wd.psize <= 10 ? env->wd.psize : 10;
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int i;
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for (i = 0; i < psize; i++) {
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args[i] = env->regs[e2k_wrap_reg_index(env->wd.base + i)];
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}
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abi_ulong ret = do_syscall(env, args[0], args[1], args[2], args[3],
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args[4], args[5], args[6], args[7], args[8]);
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if (ret == -TARGET_ERESTARTSYS) {
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/* TODO: restart syscall */
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abort();
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} else if (env->wd.psize > 0 && ret != -TARGET_QEMU_ESIGRETURN) {
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env->regs[env->wd.base] = ret;
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env->tags[env->wd.base] = 0;
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for (i = 1; i < env->wd.psize; i++) {
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int index = e2k_wrap_reg_index(env->wd.base + i);
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env->regs[index] = 0;
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env->tags[index] = E2K_TAG_NON_NUMBER64;
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}
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}
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// FIXME: Can call helpers from here?
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helper_return(env);
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break;
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}
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case E2K_EXCP_ILLOPC:
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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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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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case E2K_EXCP_ILLOPN:
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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_ILLOPN;
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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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case E2K_EXCP_MAPERR:
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info.si_signo = TARGET_SIGSEGV;
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info.si_errno = 0;
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info.si_code = TARGET_SEGV_MAPERR;
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info._sifields._sigfault._addr = env->ip;
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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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/* QEMU common interrupts */
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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_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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queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
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break;
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}
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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_HLT:
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case EXCP_HALTED:
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case EXCP_YIELD:
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fprintf(stderr, "Unhandled QEMU trap: 0x%x\n", trapnr);
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break;
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default:
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fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
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cpu_dump_state(cs, stderr, 0);
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exit(EXIT_FAILURE);
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}
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process_pending_signals (env);
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}
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}
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void target_cpu_copy_regs(CPUE2KState *env, struct target_pt_regs *regs)
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{
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env->ip = regs->ip;
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env->pcsp = regs->pcsp;
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env->psp = regs->psp;
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env->usd.lo = regs->usd_lo;
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env->usd.hi = regs->usd_hi;
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env->sbr = regs->sbr;
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e2k_break_save_state(env);
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env->pcs_base = env->pcsp.base;
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env->ps_base = env->psp.base;
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}
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