From: Stacey Son <[email protected]> Add target_to_host_msqid_ds() to convert target struct msqid_ds to host format for msgctl(2) IPC_SET operations. Uses memset to zero the struct rather than directly accessing kernel-only members. Handles FreeBSD 64-bit time_t except on i386.
Signed-off-by: Stacey Son <[email protected]> Signed-off-by: Brooks Davis <[email protected]> Signed-off-by: Sean Bruno <[email protected]> Signed-off-by: Mikael Urankar <[email protected]> Reviewed-by: Richard Henderson <[email protected]> Signed-off-by: Warner Losh <[email protected]> --- bsd-user/bsd-misc.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/bsd-user/bsd-misc.c b/bsd-user/bsd-misc.c index 5b02006313..5e5a590227 100644 --- a/bsd-user/bsd-misc.c +++ b/bsd-user/bsd-misc.c @@ -136,3 +136,30 @@ abi_long host_to_target_semid_ds(abi_ulong target_addr, return 0; } + +abi_long target_to_host_msqid_ds(struct msqid_ds *host_md, + abi_ulong target_addr) +{ + struct target_msqid_ds *target_md; + + if (!lock_user_struct(VERIFY_READ, target_md, target_addr, 1)) { + return -TARGET_EFAULT; + } + + memset(host_md, 0, sizeof(struct msqid_ds)); + target_to_host_ipc_perm__locked(&host_md->msg_perm, + &target_md->msg_perm); + + /* msg_first and msg_last are not used by IPC_SET/IPC_STAT in kernel. */ + __get_user(host_md->msg_cbytes, &target_md->msg_cbytes); + __get_user(host_md->msg_qnum, &target_md->msg_qnum); + __get_user(host_md->msg_qbytes, &target_md->msg_qbytes); + __get_user(host_md->msg_lspid, &target_md->msg_lspid); + __get_user(host_md->msg_lrpid, &target_md->msg_lrpid); + __get_user(host_md->msg_stime, &target_md->msg_stime); + __get_user(host_md->msg_rtime, &target_md->msg_rtime); + __get_user(host_md->msg_ctime, &target_md->msg_ctime); + unlock_user_struct(target_md, target_addr, 0); + + return 0; +} -- 2.52.0
