ELF

include/elf.h

struct elf64_ident

struct elf64_ident {
    uint32_t  magic;
    uint8_t   class;
    uint8_t   data;
    uint8_t   version;
    uint8_t   os_abi;
    uint8_t   abi_version;
    uint8_t   pad[7];
};

struct elf64_ehdr

struct elf64_ehdr {
    struct elf64_ident  ident;
    uint16_t            type;
    uint16_t            machine;
    uint32_t            version;
    uint64_t            entry;
    uint64_t            phoff;
    uint64_t            shoff;
    uint32_t            flags;
    uint16_t            ehsize;
    uint16_t            phentsize;
    uint16_t            phnum;
    uint16_t            shentsize;
    uint16_t            shnum;
    uint16_t            shstrndx;
};

struct elf64_ehdr referenced types:

• struct elf64_ident

struct elf64_phdr

struct elf64_phdr {
    uint32_t  type;
    uint32_t  flags;
    uint64_t  offset;
    uint64_t  vaddr;
    uint64_t  paddr;
    uint64_t  filesz;
    uint64_t  memsz;
    uint64_t  align;
};

elf_load

uint64_t elf_load(void *elf_data);

enter_userspace

void enter_userspace(uintptr_t entry_point, uintptr_t user_stack_top, uint16_t user_cs, uint16_t user_ss, uintptr_t user_pml4_phys);

syscall_setup

void syscall_setup(void *syscall_entry);

map_user_stack

uintptr_t map_user_stack(uintptr_t user_pml4_phys);

elf_map

void elf_map(uintptr_t user_pml4_phys, void *elf_data);

Defines

PT_LOAD

#define PT_LOAD 1

PF_X

#define PF_X 0x1

PF_W

#define PF_W 0x2

PF_R

#define PF_R 0x4

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