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authorAlex Bennée <alex.bennee@linaro.org>2021-05-20 18:43:02 +0100
committerAlex Bennée <alex.bennee@linaro.org>2021-05-25 16:52:50 +0100
commited12f5b4ef626bfd1deb6f178282a18ab948750e (patch)
treeeec4bcc4f2cbce724ffe4ac89dc101c4ef61950b /gdbstub.c
parentae49ce00198a46f635d5a37ab79209c145f7960f (diff)
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gdbstub: tidy away reverse debugging check into function
In theory we don't need an actual record/replay to enact reverse debugging on a purely deterministic system (i.e one with no external inputs running under icount). Tidy away the logic into a little function. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20210520174303.12310-8-alex.bennee@linaro.org>
Diffstat (limited to 'gdbstub.c')
-rw-r--r--gdbstub.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/gdbstub.c b/gdbstub.c
index 84ce770..52bde5b 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -465,6 +465,15 @@ 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
+}
+
/* Resume execution. */
static inline void gdb_continue(void)
{
@@ -1880,7 +1889,7 @@ static void handle_step(GArray *params, void *user_ctx)
static void handle_backward(GArray *params, void *user_ctx)
{
- if (replay_mode != REPLAY_MODE_PLAY) {
+ if (!stub_can_reverse()) {
put_packet("E22");
}
if (params->len == 1) {
@@ -2153,7 +2162,7 @@ static void handle_query_supported(GArray *params, void *user_ctx)
g_string_append(gdbserver_state.str_buf, ";qXfer:features:read+");
}
- if (replay_mode == REPLAY_MODE_PLAY) {
+ if (stub_can_reverse()) {
g_string_append(gdbserver_state.str_buf,
";ReverseStep+;ReverseContinue+");
}