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https://gitlab.com/qemu-project/qemu
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e1b526f1d8
The Hexagon Programmer's Reference Manual says that the exception 0x1e should be raised upon an unaligned program counter. Let's implement that and also add some tests. Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com> Reviewed-by: Brian Cain <bcain@quicinc.com> Message-Id: <277b7aeda2c717a96d4dde936b3ac77707cb6517.1714755107.git.quic_mathbern@quicinc.com> Signed-off-by: Brian Cain <bcain@quicinc.com>
88 lines
2.8 KiB
C
88 lines
2.8 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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* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
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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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#include "internal.h"
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void cpu_loop(CPUHexagonState *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_ulong syscallnum;
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target_ulong 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_INTERRUPT:
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/* just indicate that signals should be handled asap */
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break;
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case HEX_EXCP_TRAP0:
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syscallnum = env->gpr[6];
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env->gpr[HEX_REG_PC] += 4;
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ret = do_syscall(env,
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syscallnum,
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env->gpr[0],
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env->gpr[1],
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env->gpr[2],
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env->gpr[3],
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env->gpr[4],
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env->gpr[5],
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0, 0);
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if (ret == -QEMU_ERESTARTSYS) {
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env->gpr[HEX_REG_PC] -= 4;
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} else if (ret != -QEMU_ESIGRETURN) {
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env->gpr[0] = ret;
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}
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break;
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case HEX_EXCP_PC_NOT_ALIGNED:
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force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN,
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env->gpr[HEX_REG_R31]);
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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_DEBUG:
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force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, 0);
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break;
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default:
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EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
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trapnr);
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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(CPUArchState *env, struct target_pt_regs *regs)
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{
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env->gpr[HEX_REG_PC] = regs->sepc;
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env->gpr[HEX_REG_SP] = regs->sp;
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env->gpr[HEX_REG_USR] = 0x56000;
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}
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