linux-user/m68k: remove simulator syscall interface

This interface has been introduced in 2005 with the
coldfire implementation (e6e5906b6e ColdFire target.)
and looks like to do what the linux-user interface already
does with the TRAP exception rather than the ILLEGAL
exception.

This interface has not been maintained since that.
The semi-hosting interface is not removed so coldfire kernel
with semi-hosting is always supported.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20190524162049.806-1-laurent@vivier.eu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

1 files changed, 1 insertions, 16 deletions

diff --git a/linux-user/m68k/cpu_loop.c b/linux-user/m68k/cpu_loop.c
index e8d39d15f3..c7a500b58c 100644
--- a/linux-user/m68k/cpu_loop.c
+++ b/linux-user/m68k/cpu_loop.c
@@ -28,7 +28,6 @@ void cpu_loop(CPUM68KState *env)
     int trapnr;
     unsigned int n;
     target_siginfo_t info;
-    TaskState *ts = cs->opaque;
 
     for(;;) {
         cpu_exec_start(cs);
@@ -37,26 +36,14 @@ void cpu_loop(CPUM68KState *env)
         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_ILLEGAL:
         case EXCP_LINEA:
         case EXCP_LINEF:
-        do_sigill:
             info.si_signo = TARGET_SIGILL;
             info.si_errno = 0;
             info.si_code = TARGET_ILL_ILLOPN;
@@ -80,7 +67,6 @@ void cpu_loop(CPUM68KState *env)
         case EXCP_TRAP0:
             {
                 abi_long ret;
-                ts->sim_syscalls = 0;
                 n = env->dregs[0];
                 env->pc += 2;
                 ret = do_syscall(env,
@@ -154,7 +140,6 @@ void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
     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.  */