friedkiwi/qemu
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bsd-user: Add target_to_host_msqid_ds for msgctl(2)

Browse Source 
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 <sson@FreeBSD.org>
Signed-off-by: Brooks Davis <brooks@one-eyed-alien.net>
Signed-off-by: Sean Bruno <sbruno@FreeBSD.org>
Signed-off-by: Mikael Urankar <mikael.urankar@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
This commit is contained in:
Stacey Son
2026-02-02 14:55:23 -07:00
committed by Warner Losh
parent db17761920
commit ee032d237f
1 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
bsd-user/bsd-misc.c
View File

@@ -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;
}