[Qemu-devel] Re: [PATCH] Fix to 'gdb detach' stub

[Daniel Gutson <dgutson@codesourcery.com>]

[Re-done with git.]
With this patch, 'gdb detach' correctly resumes the inferior execution 
after detaching the debugger.
The bug was caused by qemu asking gdb to execute a syscall (isatty) 
after the detach, and then waiting (forever) for the reply. I fixed this 
by properly setting gdb_syscall_mode appropriately in the 'detach' 
packet handling, so subsequent syscalls are solved by qemu rather than gdb.

Signed-off-by: Daniel Gutson <dgutson@codesourcery.com>
---
  gdbstub.c |    1 +
  1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/gdbstub.c b/gdbstub.c
index 91c5f68..92bb36d 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -1848,6 +1848,7 @@ static int gdb_handle_packet(GDBState *s, const 
char *line_buf)
      case 'D':
          /* Detach packet */
          gdb_breakpoint_remove_all();
+       gdb_syscall_mode = GDB_SYS_DISABLED;
          gdb_continue(s);
          put_packet(s, "OK");
          break;
-- 
1.6.2.4