diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 120 |
1 files changed, 99 insertions, 21 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 1407b7a546..e2c10cc0bd 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -1904,23 +1904,16 @@ static abi_long do_connect(int sockfd, abi_ulong target_addr, return get_errno(connect(sockfd, addr, addrlen)); } -/* do_sendrecvmsg() Must return target values and target errnos. */ -static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg, - int flags, int send) +/* do_sendrecvmsg_locked() Must return target values and target errnos. */ +static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp, + int flags, int send) { abi_long ret, len; - struct target_msghdr *msgp; struct msghdr msg; int count; struct iovec *vec; abi_ulong target_vec; - /* FIXME */ - if (!lock_user_struct(send ? VERIFY_READ : VERIFY_WRITE, - msgp, - target_msg, - send ? 1 : 0)) - return -TARGET_EFAULT; if (msgp->msg_name) { msg.msg_namelen = tswap32(msgp->msg_namelen); msg.msg_name = alloca(msg.msg_namelen); @@ -1975,10 +1968,75 @@ static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg, out: unlock_iovec(vec, target_vec, count, !send); out2: + return ret; +} + +static abi_long do_sendrecvmsg(int fd, abi_ulong target_msg, + int flags, int send) +{ + abi_long ret; + struct target_msghdr *msgp; + + if (!lock_user_struct(send ? VERIFY_READ : VERIFY_WRITE, + msgp, + target_msg, + send ? 1 : 0)) { + return -TARGET_EFAULT; + } + ret = do_sendrecvmsg_locked(fd, msgp, flags, send); unlock_user_struct(msgp, target_msg, send ? 0 : 1); return ret; } +#ifdef TARGET_NR_sendmmsg +/* We don't rely on the C library to have sendmmsg/recvmmsg support, + * so it might not have this *mmsg-specific flag either. + */ +#ifndef MSG_WAITFORONE +#define MSG_WAITFORONE 0x10000 +#endif + +static abi_long do_sendrecvmmsg(int fd, abi_ulong target_msgvec, + unsigned int vlen, unsigned int flags, + int send) +{ + struct target_mmsghdr *mmsgp; + abi_long ret = 0; + int i; + + if (vlen > UIO_MAXIOV) { + vlen = UIO_MAXIOV; + } + + mmsgp = lock_user(VERIFY_WRITE, target_msgvec, sizeof(*mmsgp) * vlen, 1); + if (!mmsgp) { + return -TARGET_EFAULT; + } + + for (i = 0; i < vlen; i++) { + ret = do_sendrecvmsg_locked(fd, &mmsgp[i].msg_hdr, flags, send); + if (is_error(ret)) { + break; + } + mmsgp[i].msg_len = tswap32(ret); + /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ + if (flags & MSG_WAITFORONE) { + flags |= MSG_DONTWAIT; + } + } + + unlock_user(mmsgp, target_msgvec, sizeof(*mmsgp) * i); + + /* Return number of datagrams sent if we sent any at all; + * otherwise return the error. + */ + if (i) { + return i; + } + return ret; +} +#endif + /* If we don't have a system accept4() then just call accept. * The callsites to do_accept4() will ensure that they don't * pass a non-zero flags argument in this config. @@ -4528,6 +4586,9 @@ static inline int tswapid(int id) { return tswap16(id); } + +#define put_user_id(x, gaddr) put_user_u16(x, gaddr) + #else /* !USE_UID16 */ static inline int high2lowuid(int uid) { @@ -4549,6 +4610,9 @@ static inline int tswapid(int id) { return tswap32(id); } + +#define put_user_id(x, gaddr) put_user_u32(x, gaddr) + #endif /* USE_UID16 */ void syscall_init(void) @@ -6121,11 +6185,17 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, puts = NULL; } ret = get_errno(sigtimedwait(&set, &uinfo, puts)); - if (!is_error(ret) && arg2) { - if (!(p = lock_user(VERIFY_WRITE, arg2, sizeof(target_siginfo_t), 0))) - goto efault; - host_to_target_siginfo(p, &uinfo); - unlock_user(p, arg2, sizeof(target_siginfo_t)); + if (!is_error(ret)) { + if (arg2) { + p = lock_user(VERIFY_WRITE, arg2, sizeof(target_siginfo_t), + 0); + if (!p) { + goto efault; + } + host_to_target_siginfo(p, &uinfo); + unlock_user(p, arg2, sizeof(target_siginfo_t)); + } + ret = host_to_target_signal(ret); } } break; @@ -6710,6 +6780,14 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, ret = do_sendrecvmsg(arg1, arg2, arg3, 1); break; #endif +#ifdef TARGET_NR_sendmmsg + case TARGET_NR_sendmmsg: + ret = do_sendrecvmmsg(arg1, arg2, arg3, arg4, 1); + break; + case TARGET_NR_recvmmsg: + ret = do_sendrecvmmsg(arg1, arg2, arg3, arg4, 0); + break; +#endif #ifdef TARGET_NR_sendto case TARGET_NR_sendto: ret = do_sendto(arg1, arg2, arg3, arg4, arg5, arg6); @@ -7805,9 +7883,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, uid_t ruid, euid, suid; ret = get_errno(getresuid(&ruid, &euid, &suid)); if (!is_error(ret)) { - if (put_user_u16(high2lowuid(ruid), arg1) - || put_user_u16(high2lowuid(euid), arg2) - || put_user_u16(high2lowuid(suid), arg3)) + if (put_user_id(high2lowuid(ruid), arg1) + || put_user_id(high2lowuid(euid), arg2) + || put_user_id(high2lowuid(suid), arg3)) goto efault; } } @@ -7826,9 +7904,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, gid_t rgid, egid, sgid; ret = get_errno(getresgid(&rgid, &egid, &sgid)); if (!is_error(ret)) { - if (put_user_u16(high2lowgid(rgid), arg1) - || put_user_u16(high2lowgid(egid), arg2) - || put_user_u16(high2lowgid(sgid), arg3)) + if (put_user_id(high2lowgid(rgid), arg1) + || put_user_id(high2lowgid(egid), arg2) + || put_user_id(high2lowgid(sgid), arg3)) goto efault; } } |