8115fc9368
According to the M68040 Users Manual, section 8.4.3, Six word stack frame (format 2), Trace (and others) is supposed to record the next insn in PC and the address of the trapping instruction in ADDRESS. Create gen_raise_exception_format2 to record the trapping pc in env->mmu.ar. Update m68k_interrupt_all to pass the value to do_stack_frame. Update cpu_loop to handle EXCP_TRACE. Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220602013401.303699-9-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
129 lines
4.0 KiB
C
129 lines
4.0 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(CPUM68KState *env)
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{
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CPUState *cs = env_cpu(env);
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int trapnr;
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unsigned int n;
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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_HALT_INSN:
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/* Semihosing syscall. */
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env->pc += 4;
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do_m68k_semihosting(env, env->dregs[0]);
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break;
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case EXCP_ILLEGAL:
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case EXCP_LINEA:
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case EXCP_LINEF:
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force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->pc);
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break;
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case EXCP_CHK:
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force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTOVF, env->mmu.ar);
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break;
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case EXCP_DIV0:
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force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, env->mmu.ar);
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break;
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case EXCP_TRACE:
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force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_TRACE, env->mmu.ar);
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break;
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case EXCP_TRAP0:
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{
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abi_long ret;
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n = env->dregs[0];
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ret = do_syscall(env,
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n,
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env->dregs[1],
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env->dregs[2],
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env->dregs[3],
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env->dregs[4],
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env->dregs[5],
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env->aregs[0],
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0, 0);
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if (ret == -QEMU_ERESTARTSYS) {
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env->pc -= 2;
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} else if (ret != -QEMU_ESIGRETURN) {
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env->dregs[0] = ret;
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}
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}
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break;
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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_TRAP0 + 1 ... EXCP_TRAP0 + 14:
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force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLTRP, env->pc);
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break;
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case EXCP_DEBUG:
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case EXCP_TRAP15:
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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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default:
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EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
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abort();
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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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CPUState *cpu = env_cpu(env);
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TaskState *ts = cpu->opaque;
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struct image_info *info = ts->info;
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env->pc = regs->pc;
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env->dregs[0] = regs->d0;
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env->dregs[1] = regs->d1;
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env->dregs[2] = regs->d2;
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env->dregs[3] = regs->d3;
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env->dregs[4] = regs->d4;
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env->dregs[5] = regs->d5;
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env->dregs[6] = regs->d6;
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env->dregs[7] = regs->d7;
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env->aregs[0] = regs->a0;
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env->aregs[1] = regs->a1;
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env->aregs[2] = regs->a2;
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env->aregs[3] = regs->a3;
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env->aregs[4] = regs->a4;
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env->aregs[5] = regs->a5;
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env->aregs[6] = regs->a6;
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env->aregs[7] = regs->usp;
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env->sr = regs->sr;
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ts->stack_base = info->start_stack;
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ts->heap_base = info->brk;
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/* This will be filled in on the first SYS_HEAPINFO call. */
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ts->heap_limit = 0;
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}
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