Save/restore registers to host during memory operations. Cache ROM data.

Because the debug port uses instructions for most operations, the debug code
will clobber registers used by the running program. Save and restore these
to avoid corrupting application data.

If the ROM file is known, use that to return data instead of fetching it
from the target to improve performance.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/s51/s51.h b/s51/s51.h
index eab61452..f4dcce66 100644
--- a/s51/s51.h
+++ b/s51/s51.h
@@ -27,6 +27,23 @@ enum command_result {
 	command_success, command_debug, command_syntax, command_interrupt, command_error,
 };
 
+struct command_function {
+	char			*name;
+	char			*alias;
+	enum command_result	(*func)(int argc, char **argv);
+	char			*usage;
+	char			*help;
+};
+
+struct command_function *
+command_string_to_function(struct command_function *functions, char *name);
+
+enum command_result
+command_function_help(struct command_function *functions, int argc, char **argv);
+
+void
+command_syntax_error(int argc, char **argv);
+
 enum command_result
 command_quit (int argc, char **argv);
 
@@ -34,6 +51,9 @@ enum command_result
 command_help (int argc, char **argv);
 
 enum command_result
+command_stop (int argc, char **argv);
+
+enum command_result
 command_di (int argc, char **argv);
 
 enum command_result
@@ -82,6 +102,9 @@ enum command_result
 command_status (int argc, char **argv);
 
 enum command_result
+command_info (int argc, char **argv);
+
+enum command_result
 cc_wait(void);
 
 void