add patcher for fdl1

gen_fdl1-dl.c

@@ -0,0 +1,79 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define ERR_EXIT(...) \
+    do { fprintf(stderr, __VA_ARGS__); exit(1); } while (0)
+
+static uint8_t* loadfile(const char* fn, size_t* num, size_t extra) {
+    size_t n, j = 0; uint8_t* buf = 0;
+    FILE* fi = fopen(fn, "rb");
+    if (fi) {
+        fseek(fi, 0, SEEK_END);
+        n = ftell(fi);
+        if (n) {
+            fseek(fi, 0, SEEK_SET);
+            buf = (uint8_t*)malloc(n + extra);
+            if (buf) j = fread(buf, 1, n, fi);
+        }
+        fclose(fi);
+    }
+    if (num) *num = j;
+    return buf;
+}
+
+int main(int argc, char** argv)
+{
+    if (argc < 2) ERR_EXIT("Usage: %s <filename>\n", argv[0]);
+
+    char* filename = argv[1];
+    uint8_t* mem; size_t size = 0;
+    mem = loadfile(filename, &size, 0);
+    if (!mem) ERR_EXIT("loadfile(\"%s\") failed\n", filename);
+    if ((uint64_t)size >> 32) ERR_EXIT("file too big\n");
+
+    if (!(*(uint32_t*)&mem[0x30])) ERR_EXIT("The file is not sprd trusted firmware\n");
+    if (*(uint32_t*)&mem[0x30] + 0x200 > size) ERR_EXIT("The file is not complete\n");
+    if (*(uint32_t*)&mem[0x30] != *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x10])
+        size = *(uint32_t*)&mem[0x30] + 0x200;
+    else if (*(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x50])
+        size = *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x50] + *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x58];
+    else if (*(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x30])
+        size = *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x30] + *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x38];
+    else
+        size = *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x20] + *(uint32_t*)&mem[(*(uint32_t*)&mem[0x30]) + 0x200 + 0x28];
+    printf("0x%zx\n", size);
+
+    FILE* file = fopen("temp", "wb");
+    if (file == NULL) ERR_EXIT("Failed to create the file.\n");
+    size_t bytes_written = fwrite(mem, sizeof(unsigned char), size, file);
+    if (bytes_written != size) ERR_EXIT("Failed to write the file.\n");
+    fclose(file);
+
+    if (remove(filename)) ERR_EXIT("Failed to delete the file.\n");
+    if (rename("temp", filename)) ERR_EXIT("Failed to rename the file.\n");
+
+    size_t offset = 0x200;
+    while (offset < *(uint32_t*)&mem[0x30] + 0x200)
+    {
+        if (*(uint32_t*)&mem[offset] == 0x34000040)
+            if ((*(uint32_t*)&mem[offset - 4]) >> 8 == 0x940000)
+                if (*(uint32_t*)&mem[offset + 4] == 0x14000000)
+                {
+                    *(uint32_t*)&mem[offset - 4] = 0xD503201F;
+                    *(uint32_t*)&mem[offset] = 0xD503201F;
+                    *(uint32_t*)&mem[offset + 4] = 0xD503201F;
+                    offset += 4;
+                }
+        offset += 4;
+    }
+    file = fopen("fdl1-dl.bin", "wb");
+    if (file == NULL) ERR_EXIT("Failed to create the file.\n");
+    bytes_written = fwrite(mem, sizeof(unsigned char), size, file);
+    if (bytes_written != size) ERR_EXIT("Failed to write the file.\n");
+    fclose(file);
+
+    free(mem);
+
+    return 0;
+}

spl_patcher.c → gen_spl-unlock.c

@@ -68,7 +68,7 @@ int main(int argc, char** argv)
                 }
         offset += 4;
     }
-    file = fopen("spl-patched.bin", "wb");
+    file = fopen("spl-unlock.bin", "wb");
     if (file == NULL) ERR_EXIT("Failed to create the file.\n");
     bytes_written = fwrite(mem, sizeof(unsigned char), size, file);
     if (bytes_written != size) ERR_EXIT("Failed to write the file.\n");