libelf-parse

C binding of elf crate for x86 or x86_64 OS to parse ELF files easily.

Usage

Download the header file and lib from releases.

Link the library to your project.

Build

Build directly to get the two target files:

cargo build --release

The production build will be in target/release/<target>/ directory.

And use cbindgen to generate the header file:

cargo install cbindgen
cbindgen --output elf_parse.h

Example

#include <stdint.h>
#include "elf_parse.h"

extern void *page_table;

void segment_callback(struct Segment segment) {
    printk("Segment address: 0x%lx\n", segment.address);
    printk("Segment size: %lu bytes\n", segment.size);
    alloc_and_map(page_table, segment.address, segment.size);
    write_to_mapped_address(page_table, segment.address, segment.size, segment.data);
}

void elf_load_example() {
    const uint8_t elf_data[] = {};
    size_t elf_size = sizeof(elf_data);

    struct ElfParseResult result = parse_elf(elf_data, elf_size, segment_callback);

    switch (result.tag) {
        case EntryPoint:
            printk("ELF Entry Point: 0x%lx\n", result.entry_point);
            break;
        case InvalidElfData:
            printk("Invalid ELF data.\n");
            break;
        case ElfContainsNoSegments:
            printk("ELF contains no segments.\n");
            break;
        case FailedToGetSegmentData:
            printk("Failed to get segment data.\n");
            break;
        case AllocFunctionNotProvided:
            printk("Allocation function not provided.\n");
            break;
        default:
            printk("Unknown error.\n");
            break;
    }
}