9073bfd725
This enables LLDB to work with hexagon linux-user mode through the GDB remote protocol. Helped-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Taylor Simpson <tsimpson@quicinc.com> Message-Id: <c287a129dcbe7d974d8b7608e8672d34a3c91c04.1683214375.git.quic_mathbern@quicinc.com>
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
|
|
* qemu user cpu loop
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu.h"
|
|
#include "user-internals.h"
|
|
#include "cpu_loop-common.h"
|
|
#include "signal-common.h"
|
|
#include "internal.h"
|
|
|
|
void cpu_loop(CPUHexagonState *env)
|
|
{
|
|
CPUState *cs = env_cpu(env);
|
|
int trapnr;
|
|
target_ulong syscallnum;
|
|
target_ulong ret;
|
|
|
|
for (;;) {
|
|
cpu_exec_start(cs);
|
|
trapnr = cpu_exec(cs);
|
|
cpu_exec_end(cs);
|
|
process_queued_cpu_work(cs);
|
|
|
|
switch (trapnr) {
|
|
case EXCP_INTERRUPT:
|
|
/* just indicate that signals should be handled asap */
|
|
break;
|
|
case HEX_EXCP_TRAP0:
|
|
syscallnum = env->gpr[6];
|
|
env->gpr[HEX_REG_PC] += 4;
|
|
ret = do_syscall(env,
|
|
syscallnum,
|
|
env->gpr[0],
|
|
env->gpr[1],
|
|
env->gpr[2],
|
|
env->gpr[3],
|
|
env->gpr[4],
|
|
env->gpr[5],
|
|
0, 0);
|
|
if (ret == -QEMU_ERESTARTSYS) {
|
|
env->gpr[HEX_REG_PC] -= 4;
|
|
} else if (ret != -QEMU_ESIGRETURN) {
|
|
env->gpr[0] = ret;
|
|
}
|
|
break;
|
|
case EXCP_ATOMIC:
|
|
cpu_exec_step_atomic(cs);
|
|
break;
|
|
case EXCP_DEBUG:
|
|
force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, 0);
|
|
break;
|
|
default:
|
|
EXCP_DUMP(env, "\nqemu: unhandled CPU exception %#x - aborting\n",
|
|
trapnr);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
process_pending_signals(env);
|
|
}
|
|
}
|
|
|
|
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
|
|
{
|
|
env->gpr[HEX_REG_PC] = regs->sepc;
|
|
env->gpr[HEX_REG_SP] = regs->sp;
|
|
env->gpr[HEX_REG_USR] = 0x56000;
|
|
}
|