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-rw-r--r--include/linux/kgdb.h1
-rw-r--r--kernel/debug/gdbstub.c30
2 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 092e4250a458..10ca03d0a250 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -297,6 +297,7 @@ extern int
kgdb_handle_exception(int ex_vector, int signo, int err_code,
struct pt_regs *regs);
extern int kgdb_nmicallback(int cpu, void *regs);
+extern void gdbstub_exit(int status);
extern int kgdb_single_step;
extern atomic_t kgdb_active;
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 481a7bd2dfe7..a11db956dd62 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -1093,3 +1093,33 @@ int gdbstub_state(struct kgdb_state *ks, char *cmd)
put_packet(remcom_out_buffer);
return 0;
}
+
+/**
+ * gdbstub_exit - Send an exit message to GDB
+ * @status: The exit code to report.
+ */
+void gdbstub_exit(int status)
+{
+ unsigned char checksum, ch, buffer[3];
+ int loop;
+
+ buffer[0] = 'W';
+ buffer[1] = hex_asc_hi(status);
+ buffer[2] = hex_asc_lo(status);
+
+ dbg_io_ops->write_char('$');
+ checksum = 0;
+
+ for (loop = 0; loop < 3; loop++) {
+ ch = buffer[loop];
+ checksum += ch;
+ dbg_io_ops->write_char(ch);
+ }
+
+ dbg_io_ops->write_char('#');
+ dbg_io_ops->write_char(hex_asc_hi(checksum));
+ dbg_io_ops->write_char(hex_asc_lo(checksum));
+
+ /* make sure the output is flushed, lest the bootloader clobber it */
+ dbg_io_ops->flush();
+}