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path: root/target/tools/mkfimage/mkfimage.c
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Diffstat (limited to 'target/tools/mkfimage/mkfimage.c')
-rw-r--r--target/tools/mkfimage/mkfimage.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/target/tools/mkfimage/mkfimage.c b/target/tools/mkfimage/mkfimage.c
new file mode 100644
index 000000000..b1897fbd7
--- /dev/null
+++ b/target/tools/mkfimage/mkfimage.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv){
+ unsigned char *buffer = malloc(64 * 1024);
+ struct stat s;
+ unsigned int size_vmlinux = 0, real_size_vmlinux = 0;
+ const unsigned char *magic_str = "ACME_PART_MAGIC";
+ unsigned int loop;
+ unsigned char *magic;
+
+ if(argc != 3){
+ printf("%s in out\n", argv[0]);
+ return 1;
+ }
+
+ printf("Generating image\n");
+
+ FILE *vmlinux = fopen(argv[1], "r");
+ FILE *vmlinux_out = fopen(argv[2], "w");
+ if((!vmlinux) || (!vmlinux_out)){
+ printf("Error opening a file\n");
+ return 1;
+ }
+
+ stat(argv[1], &s);
+ size_vmlinux = s.st_size;
+ real_size_vmlinux = (size_vmlinux & 0xffff0000) + 0x10000;
+
+ printf("vmlinux = 0x%.08X / 0x%.08X\n", size_vmlinux, real_size_vmlinux);
+
+ unsigned int t = fread(buffer, 1, 64 * 1024, vmlinux);
+ for(loop = 0; loop < (64 * 1024) - sizeof(magic_str); loop++){
+ if(buffer[loop] == magic_str[0]){
+ if((magic = strstr(&buffer[loop], magic_str))){
+ //printf("Magic at 0x%.08X %p %p\n", magic - buffer, magic, buffer);
+ printf("Found Magic %X%X%X%X\n",
+ buffer[loop + strlen(magic_str)],
+ buffer[loop + strlen(magic_str) + 2],
+ buffer[loop + strlen(magic_str) + 1],
+ buffer[loop + strlen(magic_str) + 3]);
+
+ buffer[loop + strlen(magic_str)] = real_size_vmlinux >> 24;
+ buffer[loop + strlen(magic_str) + 2] = (real_size_vmlinux >> 16) & 0xff;
+ buffer[loop + strlen(magic_str) + 1] = (real_size_vmlinux >> 8) & 0xff;
+ buffer[loop + strlen(magic_str) + 3] = (real_size_vmlinux) & 0xff;
+
+ printf("Replaced with %.02X%.02X%.02X%.02X\n",
+ buffer[loop + strlen(magic_str)],
+ buffer[loop + strlen(magic_str) + 2],
+ buffer[loop + strlen(magic_str) + 1],
+ buffer[loop + strlen(magic_str) + 3]);
+
+ }
+ }
+ }
+
+ fwrite(buffer, 1, 64 * 1024, vmlinux_out);
+ real_size_vmlinux -= 64 * 1024;
+ do {
+ real_size_vmlinux -= 64 * 1024;
+ memset(buffer, 0, 64 * 1024);
+ fread(buffer, 1, 64 * 1024, vmlinux);
+ fwrite(buffer, 1, 64 * 1024, vmlinux_out);
+ } while (real_size_vmlinux);
+
+ return 0;
+}