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, 3 insertions, 2 deletions

diff --git a/lib/ccdbg-debug.c b/lib/ccdbg-debug.c
index 8f6f9e11..847361c7 100644
--- a/lib/ccdbg-debug.c
+++ b/lib/ccdbg-debug.c
@@ -47,7 +47,8 @@ ccdbg_debug(int level, char *format, ...)
 }
 
 void
-ccdbg_flush(void)
+ccdbg_flush(int level)
 {
-	fflush(stdout);
+	if (ccdbg_level & level)
+		fflush(stdout);
 }