return ret;
}
+/* do_brk() must return target values and target errnos. */
+static inline abi_long do_obreak(abi_ulong brk_val)
+{
+ abi_long mapped_addr;
+ abi_ulong new_brk;
+ abi_ulong old_brk;
+
+ /* brk pointers are always untagged */
+
+ /* do not allow to shrink below initial brk value */
+ if (brk_val < initial_target_brk) {
+ return target_brk;
+ }
+
+ new_brk = TARGET_PAGE_ALIGN(brk_val);
+ old_brk = TARGET_PAGE_ALIGN(target_brk);
+
+ /* new and old target_brk might be on the same page */
+ if (new_brk == old_brk) {
+ target_brk = brk_val;
+ return target_brk;
+ }
+
+ /* Release heap if necesary */
+ if (new_brk < old_brk) {
+ target_munmap(new_brk, old_brk - new_brk);
+
+ target_brk = brk_val;
+ return target_brk;
+ }
+
+ mapped_addr = target_mmap(old_brk, new_brk - old_brk,
+ PROT_READ | PROT_WRITE,
+ MAP_FIXED | MAP_EXCL | MAP_ANON | MAP_PRIVATE,
+ -1, 0);
+
+ if (mapped_addr == old_brk) {
+ target_brk = brk_val;
+ return target_brk;
+ }
+
+ /* For everything else, return the previous break. */
+ return target_brk;
+}
+
+/* shm_open(2) */
+static inline abi_long do_bsd_shm_open(abi_ulong arg1, abi_long arg2,
+ abi_long arg3)
+{
+ int ret;
+ void *p;
+
+ if (arg1 == (uintptr_t)SHM_ANON) {
+ p = SHM_ANON;
+ } else {
+ p = lock_user_string(arg1);
+ if (p == NULL) {
+ return -TARGET_EFAULT;
+ }
+ }
+ ret = get_errno(shm_open(p, target_to_host_bitmask(arg2, fcntl_flags_tbl),
+ arg3));
+
+ if (p != SHM_ANON) {
+ unlock_user(p, arg1, 0);
+ }
+
+ return ret;
+}
+
+/* shm_unlink(2) */
+static inline abi_long do_bsd_shm_unlink(abi_ulong arg1)
+{
+ int ret;
+ void *p;
+
+ p = lock_user_string(arg1);
+ if (p == NULL) {
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(shm_unlink(p)); /* XXX path(p)? */
+ unlock_user(p, arg1, 0);
+
+ return ret;
+}
+
+/* shmget(2) */
+static inline abi_long do_bsd_shmget(abi_long arg1, abi_ulong arg2,
+ abi_long arg3)
+{
+ return get_errno(shmget(arg1, arg2, arg3));
+}
+
+/* shmctl(2) */
+static inline abi_long do_bsd_shmctl(abi_long shmid, abi_long cmd,
+ abi_ulong buff)
+{
+ struct shmid_ds dsarg;
+ abi_long ret = -TARGET_EINVAL;
+
+ cmd &= 0xff;
+
+ switch (cmd) {
+ case IPC_STAT:
+ if (target_to_host_shmid_ds(&dsarg, buff)) {
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(shmctl(shmid, cmd, &dsarg));
+ if (host_to_target_shmid_ds(buff, &dsarg)) {
+ return -TARGET_EFAULT;
+ }
+ break;
+
+ case IPC_SET:
+ if (target_to_host_shmid_ds(&dsarg, buff)) {
+ return -TARGET_EFAULT;
+ }
+ ret = get_errno(shmctl(shmid, cmd, &dsarg));
+ break;
+
+ case IPC_RMID:
+ ret = get_errno(shmctl(shmid, cmd, NULL));
+ break;
+
+ default:
+ ret = -TARGET_EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+/* shmat(2) */
+static inline abi_long do_bsd_shmat(int shmid, abi_ulong shmaddr, int shmflg)
+{
+ abi_ulong raddr;
+ abi_long ret;
+ struct shmid_ds shm_info;
+
+ /* Find out the length of the shared memory segment. */
+ ret = get_errno(shmctl(shmid, IPC_STAT, &shm_info));
+ if (is_error(ret)) {
+ /* Can't get the length */
+ return ret;
+ }
+
+ if (!guest_range_valid_untagged(shmaddr, shm_info.shm_segsz)) {
+ return -TARGET_EINVAL;
+ }
+
+ WITH_MMAP_LOCK_GUARD() {
+ void *host_raddr;
+
+ if (shmaddr) {
+ host_raddr = shmat(shmid, (void *)g2h_untagged(shmaddr), shmflg);
+ } else {
+ abi_ulong mmap_start;
+
+ mmap_start = mmap_find_vma(0, shm_info.shm_segsz);
+
+ if (mmap_start == -1) {
+ return -TARGET_ENOMEM;
+ }
+ host_raddr = shmat(shmid, g2h_untagged(mmap_start),
+ shmflg | SHM_REMAP);
+ }
+
+ if (host_raddr == (void *)-1) {
+ return get_errno(-1);
+ }
+ raddr = h2g(host_raddr);
+
+ page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
+ PAGE_VALID | PAGE_RESET | PAGE_READ |
+ (shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
+
+ for (int i = 0; i < N_BSD_SHM_REGIONS; i++) {
+ if (bsd_shm_regions[i].start == 0) {
+ bsd_shm_regions[i].start = raddr;
+ bsd_shm_regions[i].size = shm_info.shm_segsz;
+ break;
+ }
+ }
+ }
+
+ return raddr;
+}
+
+/* shmdt(2) */
+static inline abi_long do_bsd_shmdt(abi_ulong shmaddr)
+{
+ abi_long ret;
+
+ WITH_MMAP_LOCK_GUARD() {
+ int i;
+
+ for (i = 0; i < N_BSD_SHM_REGIONS; ++i) {
+ if (bsd_shm_regions[i].start == shmaddr) {
+ break;
+ }
+ }
+
+ if (i == N_BSD_SHM_REGIONS) {
+ return -TARGET_EINVAL;
+ }
+
+ ret = get_errno(shmdt(g2h_untagged(shmaddr)));
+ if (ret == 0) {
+ abi_ulong size = bsd_shm_regions[i].size;
+
+ bsd_shm_regions[i].start = 0;
+ page_set_flags(shmaddr, shmaddr + size - 1, 0);
+ mmap_reserve(shmaddr, size);
+ }
+ }
+
+ return ret;
+}
+
#endif /* BSD_USER_BSD_MEM_H */