{linux,bsd}-user: Pass pid to gdbserver_fork()

The upcoming follow-fork-mode child support requires knowing the child
pid. Pass it down.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240219141628.246823-7-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240305121005.3528075-8-alex.bennee@linaro.org>

bsd-user/main.c

@@ -138,7 +138,7 @@ void fork_end(pid_t pid)
          */
         qemu_init_cpu_list();
         get_task_state(thread_cpu)->ts_tid = qemu_get_thread_id();
-        gdbserver_fork(thread_cpu);
+        gdbserver_fork(thread_cpu, pid);
     } else {
         mmap_fork_end(child);
         cpu_list_unlock();

gdbstub/user.c

@@ -375,7 +375,7 @@ static void disable_gdbstub(CPUState *thread_cpu)
 }
 
 /* Disable gdb stub for child processes.  */
-void gdbserver_fork(CPUState *cpu)
+void gdbserver_fork(CPUState *cpu, pid_t pid)
 {
     if (!gdbserver_state.init || gdbserver_user_state.fd < 0) {
         return;

include/gdbstub/user.h

@@ -54,7 +54,7 @@ void gdbserver_fork_start(void);
  * gdbserver_fork() - disable gdb stub for child processes.
  * @cs: CPU
  */
-void gdbserver_fork(CPUState *cs);
+void gdbserver_fork(CPUState *cs, pid_t pid);
 
 /**
  * gdb_syscall_entry() - inform gdb of syscall entry and yield control to it

linux-user/main.c

@@ -165,7 +165,7 @@ void fork_end(pid_t pid)
         }
         qemu_init_cpu_list();
         get_task_state(thread_cpu)->ts_tid = qemu_get_thread_id();
-        gdbserver_fork(thread_cpu);
+        gdbserver_fork(thread_cpu, pid);
     } else {
         cpu_list_unlock();
     }