linux-user: move m68k cpu loop to m68k directory

No code change, only move code from main.c to
m68k/cpu_loop.c.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180411185651.21351-14-laurent@vivier.eu>

1 files changed, 144 insertions, 0 deletions

diff --git a/linux-user/m68k/cpu_loop.c b/linux-user/m68k/cpu_loop.c
index b7700a5..b4d3d8a 100644
--- a/linux-user/m68k/cpu_loop.c
+++ b/linux-user/m68k/cpu_loop.c
@@ -21,6 +21,150 @@
 #include "qemu.h"
 #include "cpu_loop-common.h"
 
+void cpu_loop(CPUM68KState *env)
+{
+    CPUState *cs = CPU(m68k_env_get_cpu(env));
+    int trapnr;
+    unsigned int n;
+    target_siginfo_t info;
+    TaskState *ts = cs->opaque;
+
+    for(;;) {
+        cpu_exec_start(cs);
+        trapnr = cpu_exec(cs);
+        cpu_exec_end(cs);
+        process_queued_cpu_work(cs);
+
+        switch(trapnr) {
+        case EXCP_ILLEGAL:
+            {
+                if (ts->sim_syscalls) {
+                    uint16_t nr;
+                    get_user_u16(nr, env->pc + 2);
+                    env->pc += 4;
+                    do_m68k_simcall(env, nr);
+                } else {
+                    goto do_sigill;
+                }
+            }
+            break;
+        case EXCP_HALT_INSN:
+            /* Semihosing syscall.  */
+            env->pc += 4;
+            do_m68k_semihosting(env, env->dregs[0]);
+            break;
+        case EXCP_LINEA:
+        case EXCP_LINEF:
+        case EXCP_UNSUPPORTED:
+        do_sigill:
+            info.si_signo = TARGET_SIGILL;
+            info.si_errno = 0;
+            info.si_code = TARGET_ILL_ILLOPN;
+            info._sifields._sigfault._addr = env->pc;
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
+        case EXCP_CHK:
+            info.si_signo = TARGET_SIGFPE;
+            info.si_errno = 0;
+            info.si_code = TARGET_FPE_INTOVF;
+            info._sifields._sigfault._addr = env->pc;
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
+        case EXCP_DIV0:
+            info.si_signo = TARGET_SIGFPE;
+            info.si_errno = 0;
+            info.si_code = TARGET_FPE_INTDIV;
+            info._sifields._sigfault._addr = env->pc;
+            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            break;
+        case EXCP_TRAP0:
+            {
+                abi_long ret;
+                ts->sim_syscalls = 0;
+                n = env->dregs[0];
+                env->pc += 2;
+                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 == -TARGET_ERESTARTSYS) {
+                    env->pc -= 2;
+                } else if (ret != -TARGET_QEMU_ESIGRETURN) {
+                    env->dregs[0] = ret;
+                }
+            }
+            break;
+        case EXCP_INTERRUPT:
+            /* just indicate that signals should be handled asap */
+            break;
+        case EXCP_ACCESS:
+            {
+                info.si_signo = TARGET_SIGSEGV;
+                info.si_errno = 0;
+                /* XXX: check env->error_code */
+                info.si_code = TARGET_SEGV_MAPERR;
+                info._sifields._sigfault._addr = env->mmu.ar;
+                queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+            }
+            break;
+        case EXCP_DEBUG:
+            {
+                int sig;
+
+                sig = gdb_handlesig(cs, TARGET_SIGTRAP);
+                if (sig)
+                  {
+                    info.si_signo = sig;
+                    info.si_errno = 0;
+                    info.si_code = TARGET_TRAP_BRKPT;
+                    queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+                  }
+            }
+            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_GET_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->sim_syscalls = 1;
+    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;
 }