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Add timing flag and clean up printing

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This commit is contained in:
Brendan Hansknecht 2021-08-22 18:05:28 -07:00
parent 4922962576
commit e9ddde0e90
1 changed files with 23 additions and 6 deletions
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29
linker/src/lib.rs
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@ -24,6 +24,7 @@ mod metadata;
pub const CMD_PREPROCESS: &str = "preprocess";
pub const CMD_SURGERY: &str = "surgery";
pub const FLAG_VERBOSE: &str = "verbose";
pub const FLAG_TIME: &str = "time";
pub const EXEC: &str = "EXEC";
pub const METADATA: &str = "METADATA";
@ -73,6 +74,13 @@ pub fn build_app<'a>() -> App<'a> {
.short('v')
.help("Enable verbose printing")
.required(false),
)
.arg(
Arg::with_name(FLAG_TIME)
.long(FLAG_TIME)
.short('t')
.help("Print timing information")
.required(false),
),
)
.subcommand(
@ -95,12 +103,20 @@ pub fn build_app<'a>() -> App<'a> {
.short('v')
.help("Enable verbose printing")
.required(false),
)
.arg(
Arg::with_name(FLAG_TIME)
.long(FLAG_TIME)
.short('t')
.help("Print timing information")
.required(false),
),
)
}
pub fn preprocess(matches: &ArgMatches) -> io::Result<i32> {
let verbose = matches.is_present(FLAG_VERBOSE);
let time = matches.is_present(FLAG_TIME);
let total_start = SystemTime::now();
let shared_lib_processing_start = SystemTime::now();
@ -857,7 +873,7 @@ pub fn preprocess(matches: &ArgMatches) -> io::Result<i32> {
let total_duration = total_start.elapsed().unwrap();
if verbose {
if verbose || time {
println!();
println!("Timings");
report_timing("Shared Library Processing", shared_lib_processing_duration);
@ -891,6 +907,7 @@ pub fn preprocess(matches: &ArgMatches) -> io::Result<i32> {
pub fn surgery(matches: &ArgMatches) -> io::Result<i32> {
let verbose = matches.is_present(FLAG_VERBOSE);
let time = matches.is_present(FLAG_TIME);
let total_start = SystemTime::now();
let loading_metadata_start = SystemTime::now();
@ -1120,12 +1137,14 @@ pub fn surgery(matches: &ArgMatches) -> io::Result<i32> {
RelocationKind::GotRelative => {
// If we see got relative store the address directly after this section.
// GOT requires indirection if we don't modify the code.
println!("GOT hacking");
if verbose {
println!("GOT hacking this may not work right");
}
let got_val = target_offset as u64 + new_segment_vaddr;
let target_offset = (got_offset - new_segment_offset) as i64;
let data = got_val.to_le_bytes();
exec_mmap[got_offset..got_offset + 8].copy_from_slice(&data);
got_offset += 8;
got_offset = aligned_offset(got_offset + 8);
target_offset - (rel.0 as i64 + current_section_offset)
+ rel.1.addend()
}
@ -1179,8 +1198,6 @@ pub fn surgery(matches: &ArgMatches) -> io::Result<i32> {
offset = aligned_offset(offset);
let new_sh_offset = offset;
println!("Offset: {:x}", offset);
println!("Size: {}", sh_size);
exec_mmap[offset..offset + sh_size].copy_from_slice(&sh_tab);
offset += sh_size;
@ -1355,7 +1372,7 @@ pub fn surgery(matches: &ArgMatches) -> io::Result<i32> {
exec_file.set_len(offset as u64 + 1)?;
let total_duration = total_start.elapsed().unwrap();
if verbose {
if verbose || time {
println!();
println!("Timings");
report_timing("Loading Metadata", loading_metadata_duration);