diff --git a/th1520/hardware/camera/BUILD.gn b/th1520/hardware/camera/BUILD.gn
index 979ebd2d288bb4bebfb0d274ae66a55642a66564..b789f2b52e019466b19c77a9598e004de65be33c 100644
--- a/th1520/hardware/camera/BUILD.gn
+++ b/th1520/hardware/camera/BUILD.gn
@@ -16,6 +16,8 @@ isp8000_dir = rebase_path("//device/soc/thead/th1520/hardware/isp8000")
 ohos_shared_library("camera_hal") {
   sources = [
     "camera_hal/camera_hal.c",
+    "camera_hal/shm_open.c",
+    "camera_hal/strchrnul.c",
   ]
   include_dirs = [
     "./include",
diff --git a/th1520/hardware/camera/camera_hal/shm_open.c b/th1520/hardware/camera/camera_hal/shm_open.c
new file mode 100644
index 0000000000000000000000000000000000000000..c86ac65234536212d90131db287959c9df382a47
--- /dev/null
+++ b/th1520/hardware/camera/camera_hal/shm_open.c
@@ -0,0 +1,45 @@
+#include <sys/mman.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <limits.h>
+#include <pthread.h>
+
+extern char *__strchrnul(const char *s, int c);
+
+char *__shm_mapname(const char *name, char *buf)
+{
+	char *p;
+	while (*name == '/') name++;
+	if (*(p = __strchrnul(name, '/')) || p==name ||
+	    (p-name <= 2 && name[0]=='.' && p[-1]=='.')) {
+		errno = EINVAL;
+		return 0;
+	}
+	if (p-name > NAME_MAX) {
+		errno = ENAMETOOLONG;
+		return 0;
+	}
+	memcpy(buf, "/dev/shm/", 9);
+	memcpy(buf+9, name, p-name+1);
+	return buf;
+}
+
+int shm_open(const char *name, int flag, mode_t mode)
+{
+	int cs;
+	char buf[NAME_MAX+10];
+	if (!(name = __shm_mapname(name, buf))) return -1;
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+	int fd = open(name, flag|O_NOFOLLOW|O_CLOEXEC|O_NONBLOCK, mode);
+	pthread_setcancelstate(cs, 0);
+	return fd;
+}
+
+int shm_unlink(const char *name)
+{
+	char buf[NAME_MAX+10];
+	if (!(name = __shm_mapname(name, buf))) return -1;
+	return unlink(name);
+}
diff --git a/th1520/hardware/camera/camera_hal/strchrnul.c b/th1520/hardware/camera/camera_hal/strchrnul.c
new file mode 100644
index 0000000000000000000000000000000000000000..fbdbc0c62ee743b0220a4889a240cd2698301e5e
--- /dev/null
+++ b/th1520/hardware/camera/camera_hal/strchrnul.c
@@ -0,0 +1,27 @@
+#include <string.h>
+#include <stdint.h>
+#include <limits.h>
+
+#define ALIGN (sizeof(size_t))
+#define ONES ((size_t)-1/UCHAR_MAX)
+#define HIGHS (ONES * (UCHAR_MAX/2+1))
+#define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
+
+char *__strchrnul(const char *s, int c)
+{
+	c = (unsigned char)c;
+	if (!c) return (char *)s + strlen(s);
+
+#ifdef __GNUC__
+	typedef size_t __attribute__((__may_alias__)) word;
+	const word *w;
+	for (; (uintptr_t)s % ALIGN; s++)
+		if (!*s || *(unsigned char *)s == c) return (char *)s;
+	size_t k = ONES * c;
+	for (w = (void *)s; !HASZERO(*w) && !HASZERO(*w^k); w++);
+	s = (void *)w;
+#endif
+	for (; *s && *(unsigned char *)s != c; s++);
+	return (char *)s;
+}
+
diff --git a/th1520/hardware/loader/u-boot-with-spl.bin b/th1520/hardware/loader/u-boot-with-spl.bin
index 1c50e1a9390ac49ea79849c7be6fe3c9ffc0baad..a4ac9326c78588d0673ae8cb7ed6ccb6ea4c4e90 100755
Binary files a/th1520/hardware/loader/u-boot-with-spl.bin and b/th1520/hardware/loader/u-boot-with-spl.bin differ