diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 134 |
1 files changed, 113 insertions, 21 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 19630eaf20..ee82a2da4e 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -78,6 +78,9 @@ int __clone2(int (*fn)(void *), void *child_stack_base, #ifdef CONFIG_ATTR #include "qemu/xattr.h" #endif +#ifdef CONFIG_SENDFILE +#include <sys/sendfile.h> +#endif #define termios host_termios #define winsize host_winsize @@ -1776,7 +1779,7 @@ static struct iovec *lock_iovec(int type, abi_ulong target_addr, errno = 0; return NULL; } - if (count > IOV_MAX) { + if (count < 0 || count > IOV_MAX) { errno = EINVAL; return NULL; } @@ -2001,16 +2004,30 @@ out2: return ret; } -/* do_accept() Must return target values and target errnos. */ -static abi_long do_accept(int fd, abi_ulong target_addr, - abi_ulong target_addrlen_addr) +/* 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. + */ +#ifndef CONFIG_ACCEPT4 +static inline int accept4(int sockfd, struct sockaddr *addr, + socklen_t *addrlen, int flags) +{ + assert(flags == 0); + return accept(sockfd, addr, addrlen); +} +#endif + +/* do_accept4() Must return target values and target errnos. */ +static abi_long do_accept4(int fd, abi_ulong target_addr, + abi_ulong target_addrlen_addr, int flags) { socklen_t addrlen; void *addr; abi_long ret; - if (target_addr == 0) - return get_errno(accept(fd, NULL, NULL)); + if (target_addr == 0) { + return get_errno(accept4(fd, NULL, NULL, flags)); + } /* linux returns EINVAL if addrlen pointer is invalid */ if (get_user_u32(addrlen, target_addrlen_addr)) @@ -2025,7 +2042,7 @@ static abi_long do_accept(int fd, abi_ulong target_addr, addr = alloca(addrlen); - ret = get_errno(accept(fd, addr, &addrlen)); + ret = get_errno(accept4(fd, addr, &addrlen, flags)); if (!is_error(ret)) { host_to_target_sockaddr(target_addr, addr, addrlen); if (put_user_u32(addrlen, target_addrlen_addr)) @@ -2251,7 +2268,7 @@ static abi_long do_socketcall(int num, abi_ulong vptr) || get_user_ual(target_addrlen, vptr + 2 * n)) return -TARGET_EFAULT; - ret = do_accept(sockfd, target_addr, target_addrlen); + ret = do_accept4(sockfd, target_addr, target_addrlen, 0); } break; case SOCKOP_getsockname: @@ -4922,6 +4939,7 @@ static int do_futex(target_ulong uaddr, int op, int val, target_ulong timeout, #endif switch (base_op) { case FUTEX_WAIT: + case FUTEX_WAIT_BITSET: if (timeout) { pts = &ts; target_to_host_timespec(pts, timeout); @@ -4929,7 +4947,7 @@ static int do_futex(target_ulong uaddr, int op, int val, target_ulong timeout, pts = NULL; } return get_errno(sys_futex(g2h(uaddr), op, tswap32(val), - pts, NULL, 0)); + pts, NULL, val3)); case FUTEX_WAKE: return get_errno(sys_futex(g2h(uaddr), op, val, NULL, NULL, 0)); case FUTEX_FD: @@ -6673,7 +6691,16 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif #ifdef TARGET_NR_accept case TARGET_NR_accept: - ret = do_accept(arg1, arg2, arg3); + ret = do_accept4(arg1, arg2, arg3, 0); + break; +#endif +#ifdef TARGET_NR_accept4 + case TARGET_NR_accept4: +#ifdef CONFIG_ACCEPT4 + ret = do_accept4(arg1, arg2, arg3, arg4); +#else + goto unimplemented; +#endif break; #endif #ifdef TARGET_NR_bind @@ -7530,8 +7557,58 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #else goto unimplemented; #endif + +#ifdef CONFIG_SENDFILE + case TARGET_NR_sendfile: + { + off_t *offp = NULL; + off_t off; + if (arg3) { + ret = get_user_sal(off, arg3); + if (is_error(ret)) { + break; + } + offp = &off; + } + ret = get_errno(sendfile(arg1, arg2, offp, arg4)); + if (!is_error(ret) && arg3) { + abi_long ret2 = put_user_sal(off, arg3); + if (is_error(ret2)) { + ret = ret2; + } + } + break; + } +#ifdef TARGET_NR_sendfile64 + case TARGET_NR_sendfile64: + { + off_t *offp = NULL; + off_t off; + if (arg3) { + ret = get_user_s64(off, arg3); + if (is_error(ret)) { + break; + } + offp = &off; + } + ret = get_errno(sendfile(arg1, arg2, offp, arg4)); + if (!is_error(ret) && arg3) { + abi_long ret2 = put_user_s64(off, arg3); + if (is_error(ret2)) { + ret = ret2; + } + } + break; + } +#endif +#else case TARGET_NR_sendfile: +#ifdef TARGET_NR_sendfile64: + case TARGET_NR_sendfile64: +#endif goto unimplemented; +#endif + #ifdef TARGET_NR_getpmsg case TARGET_NR_getpmsg: goto unimplemented; @@ -7679,18 +7756,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, { int gidsetsize = arg1; target_id *target_grouplist; - gid_t *grouplist; + gid_t *grouplist = NULL; int i; - - grouplist = alloca(gidsetsize * sizeof(gid_t)); - target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 2, 1); - if (!target_grouplist) { - ret = -TARGET_EFAULT; - goto fail; + if (gidsetsize) { + grouplist = alloca(gidsetsize * sizeof(gid_t)); + target_grouplist = lock_user(VERIFY_READ, arg2, gidsetsize * 2, 1); + if (!target_grouplist) { + ret = -TARGET_EFAULT; + goto fail; + } + for (i = 0; i < gidsetsize; i++) { + grouplist[i] = low2highgid(tswapid(target_grouplist[i])); + } + unlock_user(target_grouplist, arg2, 0); } - for(i = 0;i < gidsetsize; i++) - grouplist[i] = low2highgid(tswapid(target_grouplist[i])); - unlock_user(target_grouplist, arg2, 0); ret = get_errno(setgroups(gidsetsize, grouplist)); } break; @@ -8552,7 +8631,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #ifdef TARGET_NR_set_robust_list case TARGET_NR_set_robust_list: - goto unimplemented_nowarn; + case TARGET_NR_get_robust_list: + /* The ABI for supporting robust futexes has userspace pass + * the kernel a pointer to a linked list which is updated by + * userspace after the syscall; the list is walked by the kernel + * when the thread exits. Since the linked list in QEMU guest + * memory isn't a valid linked list for the host and we have + * no way to reliably intercept the thread-death event, we can't + * support these. Silently return ENOSYS so that guest userspace + * falls back to a non-robust futex implementation (which should + * be OK except in the corner case of the guest crashing while + * holding a mutex that is shared with another process via + * shared memory). + */ + goto unimplemented_nowarn; #endif #if defined(TARGET_NR_utimensat) && defined(__NR_utimensat) |