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[boot] Add initial stubs for loading kernel ELF

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This commit is contained in:
Justin C. Miller
2020-05-02 23:58:41 -07:00
parent ec794f4f99
commit f78a99927a
7 changed files with 68 additions and 314 deletions
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41
src/boot/elf.h
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@@ -1,46 +1,30 @@
#pragma once
#include <stdint.h>
#ifndef ELF_VERSION
#define ELF_VERSION 1
#endif
namespace boot {
namespace elf {
#ifndef ELF_WORDSIZE
#define ELF_WORDSIZE 2
#endif
#ifndef ELF_ENDIAN
#define ELF_ENDIAN 1
#endif
#ifndef ELF_OSABI
#define ELF_OSABI 0
#endif
#ifndef ELF_MACHINE
#define ELF_MACHINE 0x3e
#endif
constexpr uint8_t version = 1;
constexpr uint8_t word_size = 2;
constexpr uint8_t endianness = 1;
constexpr uint8_t os_abi = 1;
constexpr uint16_t machine = 0x3e;
const unsigned ELF_PT_LOAD = 1;
const unsigned ELF_ST_PROGBITS = 1;
const unsigned ELF_ST_NOBITS = 8;
const unsigned long ELF_SHF_ALLOC = 0x2;
struct elf_ident
struct header
{
char magic[4];
uint8_t word_size;
uint8_t endianness;
uint8_t version;
uint8_t header_version;
uint8_t os_abi;
uint64_t reserved;
} __attribute__ ((packed));
struct elf_header
{
struct elf_ident ident;
uint16_t type;
uint16_t machine;
@@ -64,7 +48,7 @@ struct elf_header
uint16_t sh_str_idx;
} __attribute__ ((packed));
struct elf_program_header
struct program_header
{
uint32_t type;
uint32_t flags;
@@ -79,7 +63,7 @@ struct elf_program_header
uint64_t align;
} __attribute__ ((packed));
struct elf_section_header
struct section_header
{
uint32_t name;
uint32_t type;
@@ -92,3 +76,6 @@ struct elf_section_header
uint64_t align;
uint64_t entry_size;
} __attribute__ ((packed));
} // namespace elf
} // namespace boot