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// Axel '0vercl0k' Souchet | ||
use std::cmp::min; | ||
use std::env; | ||
use std::io::{self, Write}; | ||
use std::path::PathBuf; | ||
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use anyhow::Result; | ||
use clap::{Parser, Subcommand}; | ||
use kdmp_parser::KernelDumpParser; | ||
use symbolizer::{AddrSpace, Builder, Module}; | ||
use udmp_parser::UserDumpParser; | ||
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/// The command line arguments. | ||
#[derive(Debug, Parser)] | ||
#[command(about = "Symbolize an address from a user or kernel dump file.")] | ||
enum CliArgs { | ||
User { dump: PathBuf, addr: String }, | ||
Kernel { dump: PathBuf, addr: String }, | ||
} | ||
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/// Parse the `_NT_SYMBOL_PATH` environment variable to try the path of a symbol | ||
/// cache. | ||
fn sympath() -> Option<PathBuf> { | ||
let env = env::var("_NT_SYMBOL_PATH").ok()?; | ||
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if !env.starts_with("srv*") { | ||
return None; | ||
} | ||
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let sympath = env.strip_prefix("srv*").unwrap(); | ||
let sympath = PathBuf::from(sympath.split('*').next().unwrap()); | ||
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if sympath.is_dir() { | ||
Some(sympath) | ||
} else { | ||
None | ||
} | ||
} | ||
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fn user(dmp: UserDumpParser, addr: u64) -> Result<()> { | ||
#[derive(Debug)] | ||
struct UserDumpAddrSpace<'a>(UserDumpParser<'a>); | ||
impl<'a> AddrSpace for UserDumpAddrSpace<'a> { | ||
fn read_at(&mut self, addr: u64, mut buf: &mut [u8]) -> io::Result<usize> { | ||
let mut cur_addr = addr; | ||
let mut read_len = 0; | ||
while read_len < buf.len() { | ||
let Some(block) = self.0.get_mem_block(addr) else { | ||
return Err(io::Error::new( | ||
io::ErrorKind::Unsupported, | ||
format!("no mem block found for {addr:#x}"), | ||
)); | ||
}; | ||
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let Some(data) = block.data_from(cur_addr) else { | ||
panic!(); | ||
}; | ||
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let left = buf.len() - read_len; | ||
let len = min(data.len(), left); | ||
buf.write_all(&data[..len]).unwrap(); | ||
cur_addr += u64::try_from(len).unwrap(); | ||
read_len += len; | ||
} | ||
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Ok(read_len) | ||
} | ||
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fn try_read_at(&mut self, addr: u64, buf: &mut [u8]) -> io::Result<Option<usize>> { | ||
match self.read_at(addr, buf) { | ||
Ok(sz) => Ok(Some(sz)), | ||
Err(_) => Ok(None), | ||
} | ||
} | ||
} | ||
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let modules = dmp | ||
.modules() | ||
.values() | ||
.map(|module| { | ||
Module::new( | ||
module.path.file_name().unwrap().to_string_lossy(), | ||
module.start_addr(), | ||
module.end_addr(), | ||
) | ||
}) | ||
.collect::<Vec<_>>(); | ||
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let mut wrapper = UserDumpAddrSpace(dmp); | ||
let mut symb = Builder::default() | ||
.modules(&modules) | ||
.msft_symsrv() | ||
.symcache(&sympath().expect("define a _NT_SYMBOL_PATH")) | ||
.build(&mut wrapper)?; | ||
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let mut s = Vec::new(); | ||
symb.full(addr, &mut s)?; | ||
println!("{addr:#x}: {}", String::from_utf8(s)?); | ||
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Ok(()) | ||
} | ||
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fn kernel(dmp: KernelDumpParser, addr: u64) -> Result<()> { | ||
#[derive(Debug)] | ||
struct KernelDumpAdrSpace<'a>(&'a KernelDumpParser); | ||
impl<'a> AddrSpace for KernelDumpAdrSpace<'a> { | ||
fn read_at(&mut self, addr: u64, buf: &mut [u8]) -> io::Result<usize> { | ||
self.0 | ||
.virt_read(addr.into(), buf) | ||
.map_err(|e| io::Error::new(io::ErrorKind::Unsupported, e)) | ||
} | ||
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fn try_read_at(&mut self, addr: u64, buf: &mut [u8]) -> io::Result<Option<usize>> { | ||
self.0 | ||
.try_virt_read(addr.into(), buf) | ||
.map_err(|e| io::Error::new(io::ErrorKind::Unsupported, e)) | ||
} | ||
} | ||
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let mut modules = Vec::new(); | ||
for (at, name) in dmp.user_modules().chain(dmp.kernel_modules()) { | ||
let (_, filename) = name.rsplit_once('\\').unwrap_or((name, name)); | ||
modules.push(Module::new( | ||
filename.to_string(), | ||
at.start.into(), | ||
at.end.into(), | ||
)); | ||
} | ||
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let mut wrapper = KernelDumpAdrSpace(&dmp); | ||
let mut symb = Builder::default() | ||
.modules(&modules) | ||
.msft_symsrv() | ||
.symcache(&sympath().expect("define a _NT_SYMBOL_PATH")) | ||
.build(&mut wrapper)?; | ||
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let mut s = Vec::new(); | ||
symb.full(addr, &mut s)?; | ||
println!("{addr:#x}: {}", String::from_utf8(s)?); | ||
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Ok(()) | ||
} | ||
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fn hex(x: &str) -> Result<u64> { | ||
let no_backtick = x.replace('`', ""); | ||
let no_prefix = no_backtick.strip_prefix("0x").unwrap_or(x); | ||
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Ok(u64::from_str_radix(no_prefix, 16)?) | ||
} | ||
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fn main() -> Result<()> { | ||
// Parse the CLI arguments. | ||
let args = CliArgs::parse(); | ||
match args { | ||
CliArgs::User { dump, addr } => user(UserDumpParser::new(dump)?, hex(&addr)?), | ||
CliArgs::Kernel { dump, addr } => kernel(KernelDumpParser::new(dump)?, hex(&addr)?), | ||
}?; | ||
|
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Ok(()) | ||
} |
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