diff --git a/tools/ASR/linux/append b/tools/ASR/linux/append
index 8c7bca6a9cd98a61e309b46d9f965a06ca0df168..1c227bf0ea13f82acb984a1faa213742e5cee211 100644
Binary files a/tools/ASR/linux/append and b/tools/ASR/linux/append differ
diff --git a/tools/ASR/linux/append.c b/tools/ASR/linux/append.c
index 75a71d8c8835a4a32d15064bde40d05d24ab5002..d0246919629f12c8eb664808c6bc0e8327372646 100644
--- a/tools/ASR/linux/append.c
+++ b/tools/ASR/linux/append.c
@@ -16,6 +16,7 @@
 #define EADDR   -4
 #define ECREATE -5
 #define ECMD    -6
+#define EFREAD  -7
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -47,7 +48,9 @@ static bool hexstr2int(char *str, int *out)
 static long fsize(FILE *fp)
 {
     fseek(fp, 0, SEEK_END);
-    return ftell(fp);
+    long size = ftell(fp);
+    fseek(fp, 0, SEEK_SET);
+    return size;
 }
 
 static char* shellcmd(char* cmd, char* buff, int size)
@@ -194,38 +197,47 @@ int main(int argc, char *argv[])
     }
 
     // get file size
-    FILE *fp = NULL;
+    FILE *fp1 = NULL, *fp2 = NULL;
     int file_size = 0;
     
-    fp = fopen(srcfile_abspath, "r");
-    if(!fp)
+    fp1 = fopen(srcfile_abspath, "rb");
+    if(!fp1)
     {
         ret = EFOUND;
         printf("Error(%d): srcfile not found.\n", ret);
         goto exit;
     }
     
-    file_size = fsize(fp);
-    fclose(fp);
-    fp = NULL;
+    file_size = fsize(fp1);
     
     // do patch
-    fp = fopen(patchfile_abspath, "w");
-    if(!fp)
+    fp2 = fopen(patchfile_abspath, "wb");
+    if(!fp2)
     {
+        fclose(fp1);
         ret = ECREATE;
         printf("Error(%d): patchfile create fail.\n", ret);
         goto exit;
     }
     
-    fwrite(addr_str, 1, strlen(addr_str), fp);
-    fwrite(&file_size, 1, 4, fp);
-    fclose(fp);
+    fwrite(addr_str, 1, strlen(addr_str), fp2);
+    fwrite(&file_size, 1, 4, fp2);
     
-    snprintf(cmd, sizeof(cmd), "cat %s >> %s", srcfile_abspath, patchfile_abspath);
-    if(ret = system(cmd))
+    unsigned char rbuf[16384] = {0};
+    int rret = 0;
+    while((rret = fread(rbuf, 1, sizeof(rbuf), fp1)) > 0)
     {
-        printf("Error(%d): patch fail.\n", ret);
+        fwrite(rbuf, 1, rret, fp2);
+    }
+
+    fclose(fp1);
+    fclose(fp2);
+
+    if(rret < 0)
+    {
+        ret = EFREAD;
+        remove(patchfile_abspath);
+        printf("Error(%d): crc fail.\n", ret);
         goto exit;
     }
 
diff --git a/tools/ASR/linux/crc b/tools/ASR/linux/crc
index 6a97c498b153f52875df297127f91c6e7ff7e093..3ba0ec2617a52cdf76c7ed7ff2ef736124473202 100644
Binary files a/tools/ASR/linux/crc and b/tools/ASR/linux/crc differ
diff --git a/tools/ASR/linux/crc.c b/tools/ASR/linux/crc.c
index 2e909aa4b63c6bbae03af0b354d9b6bc3ed7023c..99e5cb642a5d9dcaa4025f16e25cb12b45a6f949 100644
--- a/tools/ASR/linux/crc.c
+++ b/tools/ASR/linux/crc.c
@@ -16,6 +16,7 @@
 #define EADDR   -4
 #define ECREATE -5
 #define ECMD    -6
+#define EFREAD  -7
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -47,7 +48,9 @@ static bool hexstr2int(char *str, int *out)
 static long fsize(FILE *fp)
 {
     fseek(fp, 0, SEEK_END);
-    return ftell(fp);
+    long size = ftell(fp);
+    fseek(fp, 0, SEEK_SET);
+    return size;
 }
 
 static char* shellcmd(char* cmd, char* buff, int size)
@@ -181,38 +184,46 @@ int main(int argc, char *argv[])
     }
 
     // get file size
-    FILE *fp = NULL;
+    FILE *fp1 = NULL, *fp2 = NULL;
     int file_size = 0;
     
-    fp = fopen(srcfile_abspath, "r");
-    if(!fp)
+    fp1 = fopen(srcfile_abspath, "rb");
+    if(!fp1)
     {
         ret = EFOUND;
         printf("Error(%d): srcfile not found.\n", ret);
         goto exit;
     }
     
-    file_size = fsize(fp);
-    fclose(fp);
-    fp = NULL;
+    file_size = fsize(fp1);
     
     // do crc
-    fp = fopen(crcfile_abspath, "w");
-    if(!fp)
+    fp2 = fopen(crcfile_abspath, "wb");
+    if(!fp2)
     {
+        fclose(fp1);
         ret = ECREATE;
         printf("Error(%d): crcfile create fail.\n", ret);
         goto exit;
     }
     
-    int crc_dumy = 0x0;
-    fwrite(&file_size, 1, 4, fp);
-    fwrite(&crc_dumy, 1, 4, fp);
-    fclose(fp);
-    
-    snprintf(cmd, sizeof(cmd), "cat %s >> %s", srcfile_abspath, crcfile_abspath);
-    if(ret = system(cmd))
+    fwrite(&file_size, 1, 4, fp2);
+    fwrite("=CRC", 1, 4, fp2);
+
+    unsigned char rbuf[16384] = {0};
+    int rret = 0;
+    while((rret = fread(rbuf, 1, sizeof(rbuf), fp1)) > 0)
     {
+        fwrite(rbuf, 1, rret, fp2);
+    }
+
+    fclose(fp1);
+    fclose(fp2);
+
+    if(rret < 0)
+    {
+        ret = EFREAD;
+        remove(crcfile_abspath);
         printf("Error(%d): crc fail.\n", ret);
         goto exit;
     }
@@ -221,4 +232,4 @@ int main(int argc, char *argv[])
     
 exit:
     return ret;
-}
+}
\ No newline at end of file
diff --git a/tools/ASR/win32/append.c b/tools/ASR/win32/append.c
index 75a71d8c8835a4a32d15064bde40d05d24ab5002..d0246919629f12c8eb664808c6bc0e8327372646 100644
--- a/tools/ASR/win32/append.c
+++ b/tools/ASR/win32/append.c
@@ -16,6 +16,7 @@
 #define EADDR   -4
 #define ECREATE -5
 #define ECMD    -6
+#define EFREAD  -7
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -47,7 +48,9 @@ static bool hexstr2int(char *str, int *out)
 static long fsize(FILE *fp)
 {
     fseek(fp, 0, SEEK_END);
-    return ftell(fp);
+    long size = ftell(fp);
+    fseek(fp, 0, SEEK_SET);
+    return size;
 }
 
 static char* shellcmd(char* cmd, char* buff, int size)
@@ -194,38 +197,47 @@ int main(int argc, char *argv[])
     }
 
     // get file size
-    FILE *fp = NULL;
+    FILE *fp1 = NULL, *fp2 = NULL;
     int file_size = 0;
     
-    fp = fopen(srcfile_abspath, "r");
-    if(!fp)
+    fp1 = fopen(srcfile_abspath, "rb");
+    if(!fp1)
     {
         ret = EFOUND;
         printf("Error(%d): srcfile not found.\n", ret);
         goto exit;
     }
     
-    file_size = fsize(fp);
-    fclose(fp);
-    fp = NULL;
+    file_size = fsize(fp1);
     
     // do patch
-    fp = fopen(patchfile_abspath, "w");
-    if(!fp)
+    fp2 = fopen(patchfile_abspath, "wb");
+    if(!fp2)
     {
+        fclose(fp1);
         ret = ECREATE;
         printf("Error(%d): patchfile create fail.\n", ret);
         goto exit;
     }
     
-    fwrite(addr_str, 1, strlen(addr_str), fp);
-    fwrite(&file_size, 1, 4, fp);
-    fclose(fp);
+    fwrite(addr_str, 1, strlen(addr_str), fp2);
+    fwrite(&file_size, 1, 4, fp2);
     
-    snprintf(cmd, sizeof(cmd), "cat %s >> %s", srcfile_abspath, patchfile_abspath);
-    if(ret = system(cmd))
+    unsigned char rbuf[16384] = {0};
+    int rret = 0;
+    while((rret = fread(rbuf, 1, sizeof(rbuf), fp1)) > 0)
     {
-        printf("Error(%d): patch fail.\n", ret);
+        fwrite(rbuf, 1, rret, fp2);
+    }
+
+    fclose(fp1);
+    fclose(fp2);
+
+    if(rret < 0)
+    {
+        ret = EFREAD;
+        remove(patchfile_abspath);
+        printf("Error(%d): crc fail.\n", ret);
         goto exit;
     }
 
diff --git a/tools/ASR/win32/append.exe b/tools/ASR/win32/append.exe
index 3607c21e7f9f2dbd5a58e0bf4371bda103b65c0e..0d9f6258b9bef263d8c8c1e5f8d09baab167d350 100644
Binary files a/tools/ASR/win32/append.exe and b/tools/ASR/win32/append.exe differ
diff --git a/tools/ASR/win32/crc.c b/tools/ASR/win32/crc.c
index 2e119fd35bd2ee3386cbf93f88c2a7c2025952fd..99e5cb642a5d9dcaa4025f16e25cb12b45a6f949 100644
--- a/tools/ASR/win32/crc.c
+++ b/tools/ASR/win32/crc.c
@@ -16,6 +16,7 @@
 #define EADDR   -4
 #define ECREATE -5
 #define ECMD    -6
+#define EFREAD  -7
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -47,7 +48,9 @@ static bool hexstr2int(char *str, int *out)
 static long fsize(FILE *fp)
 {
     fseek(fp, 0, SEEK_END);
-    return ftell(fp);
+    long size = ftell(fp);
+    fseek(fp, 0, SEEK_SET);
+    return size;
 }
 
 static char* shellcmd(char* cmd, char* buff, int size)
@@ -181,38 +184,46 @@ int main(int argc, char *argv[])
     }
 
     // get file size
-    FILE *fp = NULL;
+    FILE *fp1 = NULL, *fp2 = NULL;
     int file_size = 0;
     
-    fp = fopen(srcfile_abspath, "r");
-    if(!fp)
+    fp1 = fopen(srcfile_abspath, "rb");
+    if(!fp1)
     {
         ret = EFOUND;
         printf("Error(%d): srcfile not found.\n", ret);
         goto exit;
     }
     
-    file_size = fsize(fp);
-    fclose(fp);
-    fp = NULL;
+    file_size = fsize(fp1);
     
     // do crc
-    fp = fopen(crcfile_abspath, "w");
-    if(!fp)
+    fp2 = fopen(crcfile_abspath, "wb");
+    if(!fp2)
     {
+        fclose(fp1);
         ret = ECREATE;
         printf("Error(%d): crcfile create fail.\n", ret);
         goto exit;
     }
     
-    int crc_dumy = 0x0;
-    fwrite(&file_size, 1, 4, fp);
-    fwrite(&crc_dumy, 1, 4, fp);
-    fclose(fp);
-    
-    snprintf(cmd, sizeof(cmd), "cat %s >> %s", srcfile_abspath, crcfile_abspath);
-    if(ret = system(cmd))
+    fwrite(&file_size, 1, 4, fp2);
+    fwrite("=CRC", 1, 4, fp2);
+
+    unsigned char rbuf[16384] = {0};
+    int rret = 0;
+    while((rret = fread(rbuf, 1, sizeof(rbuf), fp1)) > 0)
+    {
+        fwrite(rbuf, 1, rret, fp2);
+    }
+
+    fclose(fp1);
+    fclose(fp2);
+
+    if(rret < 0)
     {
+        ret = EFREAD;
+        remove(crcfile_abspath);
         printf("Error(%d): crc fail.\n", ret);
         goto exit;
     }
diff --git a/tools/ASR/win32/crc.exe b/tools/ASR/win32/crc.exe
index 3fb109795bcefad54b5c3e6458b84fd687b46701..9d626788c97ab1e12e46a38f706a50e3fe2b3eb5 100644
Binary files a/tools/ASR/win32/crc.exe and b/tools/ASR/win32/crc.exe differ