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-rw-r--r--kernel/debug/kdb/kdb_io.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 0dbcdfbb6fd0..4802eb5840e1 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -31,15 +31,21 @@ char kdb_prompt_str[CMD_BUFLEN];
int kdb_trap_printk;
-static void kgdb_transition_check(char *buffer)
+static int kgdb_transition_check(char *buffer)
{
- int slen = strlen(buffer);
- if (strncmp(buffer, "$?#3f", slen) != 0 &&
- strncmp(buffer, "$qSupported", slen) != 0 &&
- strncmp(buffer, "+$qSupported", slen) != 0) {
+ if (buffer[0] != '+' && buffer[0] != '$') {
KDB_STATE_SET(KGDB_TRANS);
kdb_printf("%s", buffer);
+ } else {
+ int slen = strlen(buffer);
+ if (slen > 3 && buffer[slen - 3] == '#') {
+ kdb_gdb_state_pass(buffer);
+ strcpy(buffer, "kgdb");
+ KDB_STATE_SET(DOING_KGDB);
+ return 1;
+ }
}
+ return 0;
}
static int kdb_read_get_key(char *buffer, size_t bufsize)
@@ -251,6 +257,10 @@ poll_again:
case 13: /* enter */
*lastchar++ = '\n';
*lastchar++ = '\0';
+ if (!KDB_STATE(KGDB_TRANS)) {
+ KDB_STATE_SET(KGDB_TRANS);
+ kdb_printf("%s", buffer);
+ }
kdb_printf("\n");
return buffer;
case 4: /* Del */
@@ -382,10 +392,12 @@ poll_again:
* printed characters if we think that
* kgdb is connecting, until the check
* fails */
- if (!KDB_STATE(KGDB_TRANS))
- kgdb_transition_check(buffer);
- else
+ if (!KDB_STATE(KGDB_TRANS)) {
+ if (kgdb_transition_check(buffer))
+ return buffer;
+ } else {
kdb_printf("%c", key);
+ }
}
/* Special escape to kgdb */
if (lastchar - buffer >= 5 &&