Add support for gdb's memory searching capabilities to our in-kernel gdb

server.

Submitted by:	Daniel O'Connor <daniel.oconnor@isilon.com>
Reviewed by:	jhb
Sponsored by:	EMC Isilon Storage Division

1 files changed, 24 insertions, 0 deletions

diff --git a/sys/gdb/gdb_main.c b/sys/gdb/gdb_main.c
index 4ed3272..f8f3836 100644
--- a/sys/gdb/gdb_main.c
+++ b/sys/gdb/gdb_main.c
@@ -53,6 +53,8 @@ SET_DECLARE(gdb_dbgport_set, struct gdb_dbgport);
 struct gdb_dbgport *gdb_cur = NULL;
 int gdb_listening = 0;
 
+static unsigned char gdb_bindata[64];
+
 static int
 gdb_init(void)
 {
@@ -254,6 +256,28 @@ gdb_trap(int type, int code)
 					gdb_tx_begin('l');
 					gdb_tx_end();
 				}
+			} else if (gdb_rx_equal("Search:memory:")) {
+				size_t patlen;
+				intmax_t addr, size;
+				const unsigned char *found;
+				if (gdb_rx_varhex(&addr) || gdb_rx_char() != ';' ||
+				    gdb_rx_varhex(&size) || gdb_rx_char() != ';' ||
+				    gdb_rx_bindata(gdb_bindata, sizeof(gdb_bindata), &patlen)) {
+					gdb_tx_err(EINVAL);
+					break;
+				}
+				if (gdb_search_mem((char *)(uintptr_t)addr, size, gdb_bindata, patlen, &found)) {
+					if (found == 0ULL)
+						gdb_tx_begin('0');
+					else {
+						gdb_tx_begin('1');
+						gdb_tx_char(',');
+						gdb_tx_hex((intmax_t)(uintptr_t)found, 8);
+					}
+					gdb_tx_end();
+				} else
+					gdb_tx_err(EIO);
+				break;
 			} else if (!gdb_cpu_query())
 				gdb_tx_empty();
 			break;