[PATCH v4 17/26] gdbstub: specialise stub_can_reverse

[Alex Bennée]

Currently we only support replay for softmmu mode so it is a constant
false for user-mode.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

---
v3
  - rename gdb_stub_can_revers -> gdb_can_reverse
---
 gdbstub/internals.h |  1 +
 gdbstub/gdbstub.c   | 13 ++-----------
 gdbstub/softmmu.c   |  5 +++++
 gdbstub/user.c      |  5 +++++
 4 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index 26a6468a69..be0eef4850 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -130,6 +130,7 @@ CPUState *gdb_first_attached_cpu(void);
 void gdb_append_thread_id(CPUState *cpu, GString *buf);
 int gdb_get_cpu_index(CPUState *cpu);
 unsigned int gdb_get_max_cpus(void); /* both */
+bool gdb_can_reverse(void); /* softmmu, stub for user */
 
 void gdb_create_default_process(GDBState *s);
 
diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 1b783100c2..7301466ff5 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -113,15 +113,6 @@ int use_gdb_syscalls(void)
     return gdb_syscall_mode == GDB_SYS_ENABLED;
 }
 
-static bool stub_can_reverse(void)
-{
-#ifdef CONFIG_USER_ONLY
-    return false;
-#else
-    return replay_mode == REPLAY_MODE_PLAY;
-#endif
-}
-
 /* writes 2*len+1 bytes in buf */
 void gdb_memtohex(GString *buf, const uint8_t *mem, int len)
 {
@@ -1308,7 +1299,7 @@ static void handle_step(GArray *params, void *user_ctx)
 
 static void handle_backward(GArray *params, void *user_ctx)
 {
-    if (!stub_can_reverse()) {
+    if (!gdb_can_reverse()) {
         gdb_put_packet("E22");
     }
     if (params->len == 1) {
@@ -1559,7 +1550,7 @@ static void handle_query_supported(GArray *params, void 
*user_ctx)
         g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
     }
 
-    if (stub_can_reverse()) {
+    if (gdb_can_reverse()) {
         g_string_append(gdbserver_state.str_buf,
             ";ReverseStep+;ReverseContinue+");
     }
diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 3a5587d387..d2863d0663 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -450,6 +450,11 @@ unsigned int gdb_get_max_cpus(void)
     return ms->smp.max_cpus;
 }
 
+bool gdb_can_reverse(void)
+{
+    return replay_mode == REPLAY_MODE_PLAY;
+}
+
 /*
  * Softmmu specific command helpers
  */
diff --git a/gdbstub/user.c b/gdbstub/user.c
index e10988a62b..3f6183e66a 100644
--- a/gdbstub/user.c
+++ b/gdbstub/user.c
@@ -409,6 +409,11 @@ unsigned int gdb_get_max_cpus(void)
     return max_cpus;
 }
 
+/* replay not supported for user-mode */
+bool gdb_can_reverse(void)
+{
+    return false;
+}
 
 /*
  * Break/Watch point helpers
-- 
2.39.2