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sepatch
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update

This commit is contained in:
Argon 2022-09-23 18:58:51 +08:00
parent 3fabc589a6
commit 178f600ecb
1 changed files with 46 additions and 34 deletions
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78
src/main.rs
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@ -137,17 +137,25 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
let mut pos = 0usize;
let max_code_len = codes.len();
let max_data_len = data.len();
let mut search_addr : Option<u32> = None;
while pos < max_code_len {
let mut search_addr : Option<(bool, u32)> = None;
let mut code_len = 0;
loop {
pos += code_len;
if pos >= max_code_len {
break;
}
let line = codes[pos].0;
let first_code = codes[pos].1;
let op_code = (first_code >> 28) as u8;
match op_code {
0x0 => {
code_len = 2;
let val = codes[pos + 1].1 as u8;
let addr = if let Some(saddr) = search_addr {
search_addr = None;
(codes[pos].1 & 0xffffff) + saddr
let addr = if let Some(saddr) = search_addr.take() {
if saddr.0 == false {
continue;
}
(codes[pos].1 & 0xffffff) + saddr.1
} else {
codes[pos].1 & 0xfffffff
} as usize;
@ -155,13 +163,15 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
return Err(format!("apply code error at line {}: address overflow", line));
}
data[addr] = val;
pos += 2;
}
0x1 => {
code_len = 2;
let val = codes[pos + 1].1 as u16;
let addr = if let Some(saddr) = search_addr {
search_addr = None;
(codes[pos].1 & 0xffffff) + saddr
let addr = if let Some(saddr) = search_addr.take() {
if saddr.0 == false {
continue;
}
(codes[pos].1 & 0xffffff) + saddr.1
} else {
codes[pos].1 & 0xfffffff
} as usize;
@ -170,13 +180,15 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
}
data[addr] = (val & 0xff) as u8;
data[addr + 1] = ((val >> 8) & 0xff) as u8;
pos += 2;
}
0x2 => {
code_len = 2;
let val = codes[pos + 1].1;
let addr = if let Some(saddr) = search_addr {
search_addr = None;
(codes[pos].1 & 0xffffff) + saddr
let addr = if let Some(saddr) = search_addr.take() {
if saddr.0 == false {
continue;
}
(codes[pos].1 & 0xffffff) + saddr.1
} else {
codes[pos].1 & 0xfffffff
} as usize;
@ -187,13 +199,15 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
data[addr + 1] = ((val >> 8) & 0xff) as u8;
data[addr + 2] = ((val >> 16) & 0xff) as u8;
data[addr + 3] = ((val >> 24) & 0xff) as u8;
pos += 2;
}
0x4 => {
code_len = 4;
let mut val = codes[pos + 1].1;
let mut addr = if let Some(saddr) = search_addr {
search_addr = None;
(codes[pos].1 & 0xffffff) + saddr
let mut addr = if let Some(saddr) = search_addr.take() {
if saddr.0 == false {
continue;
}
(codes[pos].1 & 0xffffff) + saddr.1
} else {
codes[pos].1 & 0xfffffff
} as usize;
@ -225,28 +239,27 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
addr += addr_diff as usize;
val += val_diff;
}
pos += 4;
}
0x5 => {
return Err(format!("apply code error at line {}: not supported", line));
}
0x8 => {
let count = (codes[pos].1 & 0xfff0000) >> 16;
let search_bytes = (first_code & 0xffff) as usize;
let code_len = ((search_bytes - 1) / 4 + 1) * 2;
let mut bytes = 0;
let mut search = Vec::with_capacity(search_bytes);
while bytes < search_bytes {
let offset = pos + 1 + (bytes / 4);
let shift = (3 - (bytes % 4)) * 8;
search.push(((codes[offset].1 >> shift) & 0xff) as u8);
bytes += 1;
}
pos += code_len;
// let count = (codes[pos].1 & 0xfff0000) >> 16;
// let search_bytes = (first_code & 0xffff) as usize;
// code_len = ((search_bytes - 1) / 4 + 1) * 2;
// let mut bytes = 0;
// let mut search = Vec::with_capacity(search_bytes);
// while bytes < search_bytes {
// let offset = pos + 1 + (bytes / 4);
// let shift = (3 - (bytes % 4)) * 8;
// search.push(((codes[offset].1 >> shift) & 0xff) as u8);
// bytes += 1;
// }
}
0xa => {
let mut addr = (codes[pos].1 & 0xfffffff) as usize;
let write_bytes = codes[pos + 1].1 as usize;
code_len = ((write_bytes - 1) / 8 + 1) * 2 + 2;
if addr + write_bytes>= max_data_len {
return Err(format!("apply code error at line {}: address overflow", line));
}
@ -258,13 +271,12 @@ fn apply_code(patch_file : &str, codes : &Vec<(u32, u32)>) -> Result<(), String>
bytes += 1;
addr += 1;
}
let code_len = ((write_bytes - 1) / 8 + 1) * 2 + 2;
pos += code_len;
}
_ => ()
}
}
let mut write_file = fs::OpenOptions::new().write(true).truncate(true).open(patch_file).map_err(fn_map_err)?;
let patched_file = patch_file.to_string() + ".patched";
let mut write_file = fs::OpenOptions::new().create(true).write(true).truncate(true).open(patched_file.as_str()).map_err(fn_map_err)?;
write_file.write(data.as_slice()).map_err(fn_map_err)?;
Ok(())
}