Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

[mirror_qemu.git] / bsd-user / bsd-mem.h

diff --git a/bsd-user/bsd-mem.h b/bsd-user/bsd-mem.h
index f8dc943c23455b423ae4a46d289256089b890712..21d9bab889372ff517a73cd78b19a46c9c09a6f5 100644 (file)
--- a/bsd-user/bsd-mem.h
+++ b/bsd-user/bsd-mem.h
@@ -235,7 +235,7 @@ static inline abi_long do_obreak(abi_ulong brk_val)
         return target_brk;
     }
 
-    /* Release heap if necesary */
+    /* Release heap if necessary */
     if (new_brk < old_brk) {
         target_munmap(new_brk, old_brk - new_brk);
 
@@ -282,4 +282,171 @@ static inline abi_long do_bsd_shm_open(abi_ulong arg1, abi_long arg2,
     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;
+}
+
+static inline abi_long do_bsd_vadvise(void)
+{
+    /* See sys_ovadvise() in vm_unix.c */
+    return -TARGET_EINVAL;
+}
+
+static inline abi_long do_bsd_sbrk(void)
+{
+    /* see sys_sbrk() in vm_mmap.c */
+    return -TARGET_EOPNOTSUPP;
+}
+
+static inline abi_long do_bsd_sstk(void)
+{
+    /* see sys_sstk() in vm_mmap.c */
+    return -TARGET_EOPNOTSUPP;
+}
+
 #endif /* BSD_USER_BSD_MEM_H */