1 files changed, 38 insertions, 0 deletions

diff --git a/utils/hwpatcher/view.lua b/utils/hwpatcher/view.lua
new file mode 100644
index 0000000000..35c383800f
--- /dev/null
+++ b/utils/hwpatcher/view.lua
@@ -0,0 +1,38 @@
+--[[
+Sansa View bootloader hacking
+required argument (in order):
+- path to bootloader
+- path to output bootloader
+- path to stub
+]]-- 
+require("lib")
+require("arm")
+
+if #arg < 3 then
+    error("not enough argument to fuzep patcher")
+end
+
+local md5 = hwp.md5sum(arg[1])
+if hwp.md5str(md5) ~= "4bc1760327c37b9ffd00315c8aa7f376" then
+    error("MD5 sum of the file doesn't match")
+end
+
+local fw = hwp.load_file(arg[1])
+local jump_instr_addr = arm.to_thumb(hwp.make_addr(0x753C))
+local stub_addr = hwp.make_addr(0x137B0)
+-- read old jump address
+--local old_jump = arm.parse_branch(fw, jump_instr_addr)
+--print(string.format("Old jump address: %s", old_jump))
+-- put stub at the right place
+local stub = hwp.load_bin_file(arg[3])
+local stub_info = hwp.section_info(stub, "")
+local stub_data = hwp.read(stub, hwp.make_addr(stub_info.addr, ""), stub_info.size)
+hwp.write(fw, stub_addr, stub_data)
+-- patch jump
+local branch_to_stub = arm.make_branch(arm.to_arm(stub_addr), true)
+arm.write_branch(fw, jump_instr_addr, branch_to_stub, hwp.inc_addr(stub_addr, stub_info.size))
+-- read jump address
+local new_jump = arm.parse_branch(fw, jump_instr_addr)
+print(string.format("New jump address: %s", new_jump))
+-- save
+hwp.save_file(fw, arg[2])