cargo-binutils 0.1.1

Proxy for LLVM tools like llvm-nm, llvm-objdump and llvm-size
Documentation

cargo-binutils

Cargo subcommands to invoke the LLVM tools shipped with the Rust toolchain

NOTE This is not an official Rust project.

Features

  • All Rust symbols in the output of the LLVM tools are automatically demangled.

Installation

$ cargo install cargo-binutils

$ rustup component add llvm-tools-preview

Usage

This

$ cargo $tool -- ${args[@]}

is basically sugar for

$ $(find $(rustc --print sysroot) -name llvm-$tool) ${args[@]}

In the case of cargo-objdump the compilation target is passed as -triple=$target to llvm-objdump. -triple specifies to which architecture disassemble the object file to.

You can get more information about the CLI of each tool by running cargo $tool -- --help.

cargo $tool accepts the flags: --target and --verbose / -v. In verbose mode the llvm-$tool invocation will be printed to stderr.

Disclaimer Note that cargo-binutils simply proxies the LLVM tools in the llvm-tools-preview component and the Rust project makes no guarantee about the availability and the CLI of these tools -- i.e. the availability and CLI of these tools may change as new Rust releases are made.

Examples

nm

$ cargo nm -- target/thumbv7m-none-eabi/release/app
0800040a T BusFault
0800040a T DebugMonitor
0800040a T DefaultHandler
0800065e T HardFault
0800040a T MemoryManagement
0800040a T NonMaskableInt
0800040a T PendSV
0800040c T Reset
0800040a T SVCall
0800040a T SysTick
0800040a T UsageFault
08000408 T UserHardFault
08000008 R __EXCEPTIONS
08000040 R __INTERRUPTS
08000004 R __RESET_VECTOR
08000000 R __STACK_START

$ cargo nm -- -print-size -size-sort target/thumbv7m-none-eabi/release/app
0800040a 00000002 T DefaultHandler
08000408 00000002 T UserHardFault
08000004 00000004 R __RESET_VECTOR
08000400 00000008 T main
08000008 00000038 R __EXCEPTIONS
0800040c 00000252 T Reset
08000040 000003c0 R __INTERRUPTS

objcopy

$ cargo objcopy -- -O binary target/thumbv7m-none-eabi/release/app app.bin

$ stat --printf="%s\n" app.bin
1642

objdump

$ cargo objdump -- -disassemble -no-show-raw-insn target/thumbv7m-none-eabi/debug/app
target/thumbv7m-none-eabi/debug/app:    file format ELF32-arm-little

Disassembly of section .text:
main:
 8000400:       push    {r7, lr}
 8000402:       bl      #608
 8000406:       b       #-8 <main+0x2>

UserHardFault:
 8000408:       trap

UsageFault:
 800040a:       trap

Reset:
 800040c:       push.w  {r4, r5, r6, r7, r8, lr}
 8000410:       movw    r0, #0
 8000414:       movw    r2, #0
 8000418:       movt    r0, #8192
 800041c:       movt    r2, #8192
(..)

size

$ cargo size -- -A -x target/thumbv7m-none-eabi/release/app
target/thumbv7m-none-eabi/release/app  :
section               size         addr
.vector_table        0x400    0x8000000
.text                0x26a    0x8000400
.rodata                0x2    0x800066a
.data                    0   0x20000000
.bss                     0   0x20000000
.debug_str          0x107e            0
.debug_loc           0x3e2            0
.debug_abbrev        0x31b            0
.debug_info         0x19f9            0
.debug_ranges         0xe8            0
.debug_macinfo         0x1            0
.debug_pubnames      0x9ff            0
.debug_pubtypes      0x8dd            0
.ARM.attributes       0x2e            0
.debug_frame          0x6c            0
.debug_line          0x69b            0
.debug_aranges        0x40            0
Total               0x531a

strip

$ stat --printf="%s\n" target/release/hello
2120128

$ cargo-strip -- target/release/hello

$ stat --printf="%s\n" target/release/hello
408048

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.