semihosting: Pass CPUState to qemu_semihosting_console_inc

We don't need CPUArchState, and we do want the CPUState of the
thread performing the operation -- use this instead of current_cpu.

Reviewed-by: Luc Michel <lmichel@kalray.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

include/semihosting/console.h

@@ -39,7 +39,7 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong c);
 
 /**
  * qemu_semihosting_console_inc:
- * @env: CPUArchState
+ * @cs: CPUState
  *
  * Receive single character from debug console.  As this call may block
  * if no data is available we suspend the CPU and will re-execute the
@@ -50,7 +50,7 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong c);
  *
  * Returns: character read OR cpu_loop_exit!
  */
-target_ulong qemu_semihosting_console_inc(CPUArchState *env);
+target_ulong qemu_semihosting_console_inc(CPUState *cs);
 
 /**
  * qemu_semihosting_log_out:

linux-user/semihost.c

@@ -56,7 +56,7 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong addr)
  * program is expecting more normal behaviour. This is slow but
  * nothing using semihosting console reading is expecting to be fast.
  */
-target_ulong qemu_semihosting_console_inc(CPUArchState *env)
+target_ulong qemu_semihosting_console_inc(CPUState *cs)
 {
     uint8_t c;
     struct termios old_tio, new_tio;

semihosting/arm-compat-semi.c

@@ -428,7 +428,7 @@ void do_common_semihosting(CPUState *cs)
         break;
 
     case TARGET_SYS_READC:
-        ret = qemu_semihosting_console_inc(env);
+        ret = qemu_semihosting_console_inc(cs);
         common_semi_set_ret(cs, ret);
         break;
 

semihosting/console.c

@@ -144,17 +144,17 @@ static void console_read(void *opaque, const uint8_t *buf, int size)
     c->sleeping_cpus = NULL;
 }
 
-target_ulong qemu_semihosting_console_inc(CPUArchState *env)
+target_ulong qemu_semihosting_console_inc(CPUState *cs)
 {
     uint8_t ch;
     SemihostingConsole *c = &console;
+
     g_assert(qemu_mutex_iothread_locked());
-    g_assert(current_cpu);
     if (fifo8_is_empty(&c->fifo)) {
-        c->sleeping_cpus = g_slist_prepend(c->sleeping_cpus, current_cpu);
-        current_cpu->halted = 1;
-        current_cpu->exception_index = EXCP_HALTED;
-        cpu_loop_exit(current_cpu);
+        c->sleeping_cpus = g_slist_prepend(c->sleeping_cpus, cs);
+        cs->halted = 1;
+        cs->exception_index = EXCP_HALTED;
+        cpu_loop_exit(cs);
         /* never returns */
     }
     ch = fifo8_pop(&c->fifo);