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585abe9a18
Now any initrd file is treated like a program image and passed to the loader to load as a process. Very rudimentary elf loading just allocates pages, copies sections, and sets the ELF's entrypoint as the RIP to iretq to.
99 lines
1.5 KiB
C++
99 lines
1.5 KiB
C++
#pragma once
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#include <stdint.h>
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#include "kutil/enum_bitfields.h"
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namespace elf {
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enum class wordsize : uint8_t { invalid, bits32, bits64 };
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enum class encoding : uint8_t { invalid, lsb, msb };
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enum class osabi : uint8_t { sysV, hpux, standalone = 255 };
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enum class machine : uint16_t { none, x64 = 0x3e };
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enum class filetype : uint16_t
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{
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none,
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relocatable,
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executable,
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shared,
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core
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};
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struct file_header
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{
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uint32_t magic;
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wordsize word_size;
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encoding endianness;
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uint8_t ident_version;
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osabi os_abi;
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uint64_t reserved;
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filetype file_type;
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machine machine_type;
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uint32_t version;
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uint64_t entrypoint;
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uint64_t ph_offset;
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uint64_t sh_offset;
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uint32_t flags;
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uint16_t eh_size;
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uint16_t ph_entsize;
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uint16_t ph_num;
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uint16_t sh_entsize;
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uint16_t sh_num;
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uint16_t sh_str_idx;
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} __attribute__ ((packed));
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enum class segment_type : uint32_t { null, load, dynamic, interpreter, note };
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struct program_header
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{
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segment_type type;
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uint32_t flags;
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uint64_t offset;
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uint64_t vaddr;
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uint64_t paddr;
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uint64_t file_size;
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uint64_t mem_size;
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uint64_t align;
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} __attribute__ ((packed));
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enum class section_type : uint32_t { null, progbits };
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enum class section_flags : uint64_t
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{
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write = 0x01,
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alloc = 0x02,
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exec = 0x04,
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};
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struct section_header
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{
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uint32_t name_offset;
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section_type type;
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section_flags flags;
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uint64_t addr;
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uint64_t offset;
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uint64_t size;
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uint32_t link;
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uint32_t info;
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uint64_t align;
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uint64_t entry_size;
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} __attribute__ ((packed));
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} // namespace elf
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IS_BITFIELD(elf::section_flags);
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