fixed syscall errno return.

components/lwp/lwp_syscall.c

@@ -481,8 +481,14 @@ ssize_t sys_read(int fd, void *buf, size_t nbyte)
         lwp_put_to_user(buf, kmem, ret);
     }
 
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kmem);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 #else
     if (!lwp_user_accessable((void *)buf, nbyte))
     {
@@ -518,9 +524,14 @@ ssize_t sys_write(int fd, const void *buf, size_t nbyte)
 
     lwp_get_from_user(kmem, (void *)buf, nbyte);
     ret = write(fd, kmem, nbyte);
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
 
     kmem_put(kmem);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 #else
     if (!lwp_user_accessable((void *)buf, nbyte))
     {
@@ -565,9 +576,14 @@ int sys_open(const char *name, int flag, ...)
 
     lwp_get_from_user(kname, (void *)name, len + 1);
     ret = open(kname, flag, 0);
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
 
     kmem_put(kname);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 #else
     if (!lwp_user_accessable((void *)name, 1))
     {
@@ -614,7 +630,8 @@ int sys_fstat(int file, struct stat *buf)
         {
             ret = GET_ERRNO();
         }
-        return (ret < 0 ? GET_ERRNO() : ret);
+
+        return ret;
     }
 #else
     if (!lwp_user_accessable((void *)buf, sizeof(struct stat)))
@@ -845,6 +862,11 @@ int sys_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, s
         lwp_put_to_user(exceptfds, kexceptfds, sizeof *kexceptfds);
     }
 quit:
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     if (kreadfds)
     {
         kmem_put(kreadfds);
@@ -857,7 +879,7 @@ quit:
     {
         kmem_put(kexceptfds);
     }
-    return (ret < 0 ? GET_ERRNO() : ret);
+    return ret;
 #else
     int ret;
 
@@ -906,9 +928,13 @@ int sys_unlink(const char *pathname)
 
     lwp_get_from_user(kname, (void *)pathname, len + 1);
     ret = unlink(kname);
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
 
     kmem_put(kname);
-    return (ret < 0 ? GET_ERRNO() : ret);
+    return ret;
 #else
     int ret = 0;
     ret = unlink(pathname);
@@ -1679,6 +1705,7 @@ int _sys_fork(void)
 {
     rt_base_t level;
     int tid = 0;
+    rt_err_t falival = 0;
     struct rt_lwp *lwp = RT_NULL;
     struct rt_lwp *self_lwp = RT_NULL;
     rt_thread_t thread = RT_NULL;
@@ -1737,6 +1764,7 @@ int _sys_fork(void)
             self_thread->init_tick);
     if (!thread)
     {
+        SET_ERRNO(ENOMEM);
         goto fail;
     }
 
@@ -1789,6 +1817,7 @@ int _sys_fork(void)
         if (ret < 0)
         {
             LOG_E("malloc fail!\n");
+            SET_ERRNO(ENOMEM);
             goto fail;
         }
 
@@ -1798,6 +1827,8 @@ int _sys_fork(void)
     rt_thread_startup(thread);
     return lwp_to_pid(lwp);
 fail:
+    falival = GET_ERRNO();
+
     if (tid != 0)
     {
         lwp_tid_put(tid);
@@ -1806,7 +1837,7 @@ fail:
     {
         lwp_ref_dec(lwp);
     }
-    return GET_ERRNO();
+    return falival;
 }
 
 size_t lwp_user_strlen(const char *s, int *err)
@@ -2945,8 +2976,14 @@ int sys_recvfrom(int socket, void *mem, size_t len, int flags,
         lwp_put_to_user(mem, kmem, len);
     }
 
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kmem);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 #else
     int ret = -1;
     if (from)
@@ -3015,8 +3052,14 @@ int sys_sendto(int socket, const void *dataptr, size_t size, int flags,
         ret = sendto(socket, kmem, size, flgs, NULL, tolen);
     }
 
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kmem);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 #else
     int ret;
     if (to)
@@ -3476,6 +3519,11 @@ int sys_getaddrinfo(const char *nodename,
     }
 
 exit:
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     if (k_nodename)
     {
         rt_free(k_nodename);
@@ -3489,7 +3537,7 @@ exit:
         rt_free(k_hints);
     }
 
-    return (ret < 0 ? GET_ERRNO() : ret);
+    return ret;
 }
 
 #define HOSTENT_BUFSZ   512
@@ -3587,6 +3635,11 @@ int sys_gethostbyname2_r(const char *name, int af, struct hostent *ret,
     ret_val = 0;
 
 __exit:
+    if (ret_val < 0)
+    {
+        ret_val = GET_ERRNO();
+    }
+
     /* release buffer */
     if (sal_buf)
     {
@@ -3597,7 +3650,7 @@ __exit:
         free(k_name);
     }
 
-    return (ret_val < 0 ? GET_ERRNO() : ret_val);
+    return ret_val;
 }
 #endif
 
@@ -3717,8 +3770,15 @@ int sys_getdents(int fd, struct libc_dirent *dirp, size_t nbytes)
         }
         ret = cnt * sizeof(struct libc_dirent);
     }
+
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     rt_free(rtt_dirp);
-    return (ret < 0 ? GET_ERRNO() : ret);
+
+    return ret;
 }
 
 rt_err_t sys_get_errno(void)
@@ -3779,22 +3839,24 @@ int sys_access(const char *filename, int mode)
     }
 
     kname = (char *)kmem_get(len + 1);
-    if (!ret && !kname)
+    if (!kname)
     {
         return -ENOMEM;
     }
 
-    if (!ret)
+    lwp_get_from_user(kname, (void *)filename, len + 1);
+    ret = access(kname, mode);
+    if (ret < 0)
     {
-        lwp_get_from_user(kname, (void *)filename, len + 1);
-        ret = access(kname, mode);
-        kmem_put(kname);
+        ret = GET_ERRNO();
     }
+
+    kmem_put(kname);
+    return ret;
 #else
     ret = access(filename, mode);
-#endif
-
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_pipe(int fd[2])
@@ -3828,15 +3890,22 @@ int sys_clock_settime(clockid_t clk, const struct timespec *ts)
 
     lwp_get_from_user(kts, (void *)ts, size);
     ret = clock_settime(clk, kts);
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kts);
+
+    return ret;
 #else
     if (!lwp_user_accessable((void *)ts, sizeof(struct timespec)))
     {
         return -EFAULT;
     }
     ret = clock_settime(clk, ts);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_clock_gettime(clockid_t clk, struct timespec *ts)
@@ -3861,15 +3930,22 @@ int sys_clock_gettime(clockid_t clk, struct timespec *ts)
     if (ret != -1)
         lwp_put_to_user(ts, kts, size);
 
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kts);
+
+    return ret;
 #else
     if (!lwp_user_accessable((void *)ts, sizeof(struct timespec)))
     {
         return -EFAULT;
     }
     ret = clock_gettime(clk, ts);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_clock_nanosleep(clockid_t clk, int flags, const struct timespec *rqtp, struct timespec *rmtp)
@@ -4207,6 +4283,7 @@ int sys_fsync(int fd)
 mqd_t sys_mq_open(const char *name, int flags, mode_t mode, struct mq_attr *attr)
 {
     mqd_t mqdes;
+    rt_err_t ret = 0;
 #ifdef ARCH_MM_MMU
     char *kname = RT_NULL;
     int a_err = 0;
@@ -4226,13 +4303,17 @@ mqd_t sys_mq_open(const char *name, int flags, mode_t mode, struct mq_attr *attr
     lwp_get_from_user(&attr_k, (void *)attr, sizeof(struct mq_attr));
     lwp_get_from_user(kname, (void *)name, len + 1);
     mqdes = mq_open(kname, flags, mode, &attr_k);
+    if (mqdes == RT_NULL)
+    {
+        ret = GET_ERRNO();
+    }
     lwp_put_to_user(attr, &attr_k, sizeof(struct mq_attr));
     kmem_put(kname);
 #else
     mqdes = mq_open(name, flags, mode, attr);
 #endif
     if (mqdes == RT_NULL)
-        return (mqd_t)GET_ERRNO();
+        return (mqd_t)ret;
     else
         return mqdes;
 }
@@ -4257,11 +4338,16 @@ int sys_mq_unlink(const char *name)
 
     lwp_get_from_user(kname, (void *)name, len + 1);
     ret = mq_unlink(kname);
+    if (err < 0)
+    {
+        ret = GET_ERRNO();
+    }
     kmem_put(kname);
+    return ret;
 #else
     ret = mq_unlink(name);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_mq_timedsend(mqd_t mqd, const char *msg, size_t len, unsigned prio, const struct timespec *at)
@@ -4282,11 +4368,18 @@ int sys_mq_timedsend(mqd_t mqd, const char *msg, size_t len, unsigned prio, cons
     lwp_get_from_user(&at_k, (void *)at, sizeof(struct timespec));
     lwp_get_from_user(kmsg, (void *)msg, len + 1);
     ret = mq_timedsend(mqd, kmsg, len, prio, &at_k);
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kmsg);
+
+    return ret;
 #else
     ret = mq_timedsend(mqd, msg, len, prio, at);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_mq_timedreceive(mqd_t mqd, char *restrict msg, size_t len, unsigned *restrict prio, const struct timespec *restrict at)
@@ -4310,11 +4403,19 @@ int sys_mq_timedreceive(mqd_t mqd, char *restrict msg, size_t len, unsigned *res
     ret = mq_timedreceive(mqd, kmsg, len, prio, &at_k);
     if (ret > 0)
         lwp_put_to_user(msg, kmsg, len + 1);
+
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kmsg);
+
+    return ret;
 #else
     ret = mq_timedreceive(mqd, msg, len, prio, at);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_mq_notify(mqd_t mqd, const struct sigevent *sev)
@@ -4358,13 +4459,21 @@ int sys_mq_getsetattr(mqd_t mqd, const struct mq_attr *restrict new, struct mq_a
     ret = mq_setattr(mqd, knew, kold);
     if (ret != -1)
         lwp_put_to_user(old, kold, size);
+
+    if (ret < 0)
+    {
+        ret = GET_ERRNO();
+    }
+
     kmem_put(kold);
     if (new != RT_NULL)
         kmem_put(knew);
+
+    return ret;
 #else
     ret = mq_setattr(mqd, new, old);
-#endif
     return (ret < 0 ? GET_ERRNO() : ret);
+#endif
 }
 
 int sys_mq_close(mqd_t mqd)