https://github.com/ratfactor/mez

One-off tool to help me debug my Meow5 ELF executables
https://github.com/ratfactor/mez

Last synced: 3 months ago
JSON representation

One-off tool to help me debug my Meow5 ELF executables

• Host: GitHub
• URL: https://github.com/ratfactor/mez
• Owner: ratfactor
• Created: 2023-04-23T17:52:09.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-05-09T20:08:20.000Z (over 1 year ago)
• Last Synced: 2023-05-09T21:22:31.688Z (over 1 year ago)
• Language: Zig
• Size: 10.7 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# MEZ = Meow5 + ELF + Zig

**MOVED!** Hello, I am moving my repos to http://ratfactor.com/repos/

and setting them to read-only ("archived") on GitHub. Thank you, _-Dave_

This is a one-off utility (at least so far) written in Zig

to help me debug the 32-bit ELF executables I'm exporting

from

Meow5,

my toy language experiment.

This tool is highly specific to solving my bug.

(But, actually, I'm quite pleased with how nicely the

program LOAD segment display turned out. Now my little

brain can _see_ what is going on!)

Example output:

    $ ./build.sh

    $ ./mez

    -----------------------------------------

    Main ELF Header

      0-3 - four bytes of magic (0x7f,'ELF'): Matched!

        4 - 32-bit, as expected.

        5 - little-endian, as expected.

    24-27 - Program entry addr: 0x08048000

    28-31 - Program header offset (in this file): 0x34

    32-35 - Section header offset (in this file): 0x0

    40-41 - Size of this header: 52 bytes

    42-43 - Size of program header entries: 32 bytes

    44-45 - Number of program entries: 2

    -----------------------------------------

    Program Header @ 0x34

      Segment type: 1 ('load', as expected)

      File offset: 0x0

      File size: 4096 bytes

      Target memory start: 0x8048000

      Target memory size: 4096 bytes

      Memory mapping:

        +--------------------+     +--------------------+

        | File               | ==> | Memory             |

        |====================|     |====================|

        | 0x0                |     | 0x08048000         |

        |   Load: 4096       |     |   Alloc: 4096      |

        | 0x1000             |     | 0x08049000         |

        +--------------------+     +--------------------+

    -----------------------------------------

    Program Header @ 0x54

      Segment type: 1 ('load', as expected)

      File offset: 0x142

      File size: 5 bytes

      Target memory start: 0x8049000

      Target memory size: 10 bytes

      Memory mapping:

        +--------------------+     +--------------------+

        | File               | ==> | Memory             |

        |====================|     |====================|

        | 0x142              |     | 0x08049000         |

        |   Load: 5          |     |   Alloc: 10        |

        | 0x147              |     | 0x0804900a         |

        +--------------------+     +--------------------+

NOTE: Mez stupidly assumes you've got a file to examine called

`foo` in the current working directory directory.