0f9668e0c1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
96 lines
3.1 KiB
C
96 lines
3.1 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.h"
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#include "user-internals.h"
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#include "cpu_loop-common.h"
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#include "signal-common.h"
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void cpu_loop(CPUOpenRISCState *env)
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{
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CPUState *cs = env_cpu(env);
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int trapnr;
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abi_long ret;
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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_SYSCALL:
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env->pc += 4; /* 0xc00; */
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ret = do_syscall(env,
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cpu_get_gpr(env, 11), /* return value */
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cpu_get_gpr(env, 3), /* r3 - r7 are params */
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cpu_get_gpr(env, 4),
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cpu_get_gpr(env, 5),
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cpu_get_gpr(env, 6),
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cpu_get_gpr(env, 7),
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cpu_get_gpr(env, 8), 0, 0);
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if (ret == -QEMU_ERESTARTSYS) {
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env->pc -= 4;
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} else if (ret != -QEMU_ESIGRETURN) {
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cpu_set_gpr(env, 11, ret);
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}
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break;
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case EXCP_ALIGN:
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force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, env->eear);
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break;
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case EXCP_ILLEGAL:
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force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->pc);
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break;
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case EXCP_INTERRUPT:
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/* We processed the pending cpu work above. */
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break;
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case EXCP_DEBUG:
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force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc);
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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_RANGE:
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/* Requires SR.OVE set, which linux-user won't do. */
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cpu_abort(cs, "Unexpected RANGE exception");
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case EXCP_FPE:
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/*
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* Requires FPSCR.FPEE set. Writes to FPSCR from usermode not
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* yet enabled in kernel ABI, so linux-user does not either.
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*/
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cpu_abort(cs, "Unexpected FPE exception");
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default:
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g_assert_not_reached();
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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(CPUArchState *env, struct target_pt_regs *regs)
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{
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int i;
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for (i = 0; i < 32; i++) {
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cpu_set_gpr(env, i, regs->gpr[i]);
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}
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env->pc = regs->pc;
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cpu_set_sr(env, regs->sr);
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}
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