semihosting: Split out semihost_sys_close

Split out the non-ARM specific portions of SYS_CLOSE to a
reusable function.  This handles all GuestFD.

Note that gdb_do_syscall %x reads target_ulong, not int.

Reviewed-by: Luc Michel <lmichel@kalray.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/semihosting/guestfd.c b/semihosting/guestfd.c
index 7ac2e147a8..e3122ebba9 100644
--- a/semihosting/guestfd.c
+++ b/semihosting/guestfd.c
@@ -49,6 +49,11 @@ int alloc_guestfd(void)
     return i;
 }
 
+static void do_dealloc_guestfd(GuestFD *gf)
+{
+    gf->type = GuestFDUnused;
+}
+
 /*
  * Look up the guestfd in the data structure; return NULL
  * for out of bounds, but don't check whether the slot is unused.
@@ -119,5 +124,5 @@ void dealloc_guestfd(int guestfd)
     GuestFD *gf = do_get_guestfd(guestfd);
 
     assert(gf);
-    gf->type = GuestFDUnused;
+    do_dealloc_guestfd(gf);
 }