mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 20:44:16 +00:00
a638af09b6
While we had a call to do_m68k_semihosting in linux-user, it wasn't actually reachable. We don't include DISAS_INSN(halt) as an instruction unless system mode. Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/*
|
|
* qemu user cpu loop
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* 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"
|
|
|
|
void cpu_loop(CPUM68KState *env)
|
|
{
|
|
CPUState *cs = env_cpu(env);
|
|
int trapnr;
|
|
unsigned int n;
|
|
|
|
for(;;) {
|
|
cpu_exec_start(cs);
|
|
trapnr = cpu_exec(cs);
|
|
cpu_exec_end(cs);
|
|
process_queued_cpu_work(cs);
|
|
|
|
switch(trapnr) {
|
|
case EXCP_ILLEGAL:
|
|
case EXCP_LINEA:
|
|
case EXCP_LINEF:
|
|
force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->pc);
|
|
break;
|
|
case EXCP_CHK:
|
|
case EXCP_TRAPCC:
|
|
force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTOVF, env->mmu.ar);
|
|
break;
|
|
case EXCP_DIV0:
|
|
force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, env->mmu.ar);
|
|
break;
|
|
case EXCP_TRACE:
|
|
force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_TRACE, env->mmu.ar);
|
|
break;
|
|
case EXCP_TRAP0:
|
|
{
|
|
abi_long ret;
|
|
n = env->dregs[0];
|
|
ret = do_syscall(env,
|
|
n,
|
|
env->dregs[1],
|
|
env->dregs[2],
|
|
env->dregs[3],
|
|
env->dregs[4],
|
|
env->dregs[5],
|
|
env->aregs[0],
|
|
0, 0);
|
|
if (ret == -QEMU_ERESTARTSYS) {
|
|
env->pc -= 2;
|
|
} else if (ret != -QEMU_ESIGRETURN) {
|
|
env->dregs[0] = ret;
|
|
}
|
|
}
|
|
break;
|
|
case EXCP_INTERRUPT:
|
|
/* just indicate that signals should be handled asap */
|
|
break;
|
|
case EXCP_TRAP0 + 1 ... EXCP_TRAP0 + 14:
|
|
force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLTRP, env->pc);
|
|
break;
|
|
case EXCP_DEBUG:
|
|
case EXCP_TRAP15:
|
|
force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc);
|
|
break;
|
|
case EXCP_ATOMIC:
|
|
cpu_exec_step_atomic(cs);
|
|
break;
|
|
default:
|
|
EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
|
|
abort();
|
|
}
|
|
process_pending_signals(env);
|
|
}
|
|
}
|
|
|
|
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
|
|
{
|
|
CPUState *cpu = env_cpu(env);
|
|
TaskState *ts = cpu->opaque;
|
|
struct image_info *info = ts->info;
|
|
|
|
env->pc = regs->pc;
|
|
env->dregs[0] = regs->d0;
|
|
env->dregs[1] = regs->d1;
|
|
env->dregs[2] = regs->d2;
|
|
env->dregs[3] = regs->d3;
|
|
env->dregs[4] = regs->d4;
|
|
env->dregs[5] = regs->d5;
|
|
env->dregs[6] = regs->d6;
|
|
env->dregs[7] = regs->d7;
|
|
env->aregs[0] = regs->a0;
|
|
env->aregs[1] = regs->a1;
|
|
env->aregs[2] = regs->a2;
|
|
env->aregs[3] = regs->a3;
|
|
env->aregs[4] = regs->a4;
|
|
env->aregs[5] = regs->a5;
|
|
env->aregs[6] = regs->a6;
|
|
env->aregs[7] = regs->usp;
|
|
env->sr = regs->sr;
|
|
|
|
ts->stack_base = info->start_stack;
|
|
ts->heap_base = info->brk;
|
|
/* This will be filled in on the first SYS_HEAPINFO call. */
|
|
ts->heap_limit = 0;
|
|
}
|