From df24a2eaa1e2de82d3033e1f37f17ad9c9a1c58e Mon Sep 17 00:00:00 2001 From: Serban Constantinescu Date: Fri, 21 Feb 2014 14:40:25 -0800 Subject: [PATCH] staging: binder: Fix ABI for 64bit Android MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit BC_REQUEST_DEATH_NOTIFICATION and BC_CLEAR_DEATH_NOTIFICATION were defined with the wrong structure that did not match the code. Since a binder pointer and handle are the same size on 32 bit systems, this change does not affect them. The two commands claimed they were using struct binder_ptr_cookie but they are using a 32bit handle and a pointer. The main purpose of this patch is to add the binder_handle_cookie struct so the service manager does not have to define its own version (libbinder writes one field at a time so it does not use the struct). On 32bit systems the payload size is the same as the size of struct binder_ptr_cookie. On 64bit systems, the size does differ, and the ioctl number does change. However, there are no known 64bit users of this interface, and any 64bit systems will need the following patch to run 32 bit processes anyway, so it is not expected that anyone will ship a 64bit system without this change, so this change should not affect any existing systems. Cc: Colin Cross Cc: Arve Hjønnevåg Cc: Serban Constantinescu Cc: Android Kernel Team Signed-off-by: Serban Constantinescu [jstultz: Few 80+ col fixes for checkpatch, improved commit message with help from Serban, and included rational from Arve's email] Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- drivers/staging/android/uapi/binder.h | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/staging/android/uapi/binder.h b/drivers/staging/android/uapi/binder.h index 2b1eb8106d58..4071fcffa83c 100644 --- a/drivers/staging/android/uapi/binder.h +++ b/drivers/staging/android/uapi/binder.h @@ -152,6 +152,11 @@ struct binder_ptr_cookie { void *cookie; }; +struct binder_handle_cookie { + __u32 handle; + void *cookie; +} __attribute__((packed)); + struct binder_pri_desc { __s32 priority; __u32 desc; @@ -308,15 +313,17 @@ enum binder_driver_command_protocol { * of looping threads it has available. */ - BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, struct binder_ptr_cookie), + BC_REQUEST_DEATH_NOTIFICATION = _IOW('c', 14, + struct binder_handle_cookie), /* - * void *: ptr to binder + * int: handle * void *: cookie */ - BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, struct binder_ptr_cookie), + BC_CLEAR_DEATH_NOTIFICATION = _IOW('c', 15, + struct binder_handle_cookie), /* - * void *: ptr to binder + * int: handle * void *: cookie */ -- 2.30.2