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Ayaan Tunio
2025-02-12 09:54:05 -05:00
commit 7118adc514
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kernel/include/tasking/elf.h Normal file
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#ifndef _KERNEL_TASKING_ELF_H
#define _KERNEL_TASKING_ELF_H
#define ELF_CLASS_32 1
#define ELF_CLASS_64 2
#define ELF_DATA2_LSB 1
#define ELF_DATA2_MSB 2
enum E_IDENT_FIELDS {
EI_MAG0,
EI_MAG1,
EI_MAG2,
EI_MAG3,
EI_CLASS,
EI_DATA,
EI_VERSION,
EI_OSABI,
EI_ABIVERSION,
};
enum E_TYPE_FIELDS {
ET_NONE,
ET_REL,
ET_EXEC,
ET_DYN,
ET_CORE,
};
enum E_MACHINE_FIELDS {
EM_NONE = 0x0,
EM_386 = 0x03,
EM_ARM = 0x28,
EM_AMD64 = 0x3e,
EM_AARCH64 = 0xB7,
EM_RISCV = 0xF3,
};
typedef struct {
uint8_t e_ident[16];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
uint32_t e_entry;
uint32_t e_phoff;
uint32_t e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
} elf_header_32_t;
typedef struct {
uint8_t e_ident[16];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
uint64_t e_entry;
uint64_t e_phoff;
uint64_t e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
} elf_header_64_t;
enum P_TYPE_FIELDS {
PT_NULL,
PT_LOAD,
PT_DYNAMIC,
PT_INTERP,
PT_NOTE,
PT_SHLIB,
PT_PHDR,
PT_TLS,
PT_LOOS = 0x60000000,
PT_HIOS = 0x6FFFFFFF,
PT_LOPROC = 0x70000000,
PT_HIPROC = 0x7FFFFFFF,
};
enum P_FLAGS_FIELDS {
PF_X = 0x1,
PF_W = 0x2,
PF_R = 0x4,
PF_MASKPROC = 0xf0000000,
};
typedef struct {
uint32_t p_type;
uint32_t p_offset;
uint32_t p_vaddr;
uint32_t p_paddr;
uint32_t p_filesz;
uint32_t p_memsz;
uint32_t p_flags;
uint32_t p_align;
} elf_program_header_32_t;
typedef struct {
uint32_t p_type;
uint32_t p_flags;
uint64_t p_offset;
uint64_t p_vaddr;
uint64_t p_paddr;
uint64_t p_filesz;
uint64_t p_memsz;
uint64_t p_align;
} elf_program_header_64_t;
enum SH_TYPE_FIELDS {
SHT_NULL,
SHT_PROGBITS,
SHT_SYMTAB,
SHT_STRTAB,
SHT_RELA,
SHT_HASH,
SHT_DYNAMIC,
SHT_NOTE,
SHT_NOBITS,
SHT_REL,
SHT_SHLIB,
SHT_DYNSYM,
SHT_INIT_ARRAY,
SHT_FINI_ARRAY,
SHT_PREINIT_ARRAY,
SHT_GROUP,
SHT_SYMTAB_SHNDX,
SHT_LOOS = 1610612736,
SHT_HIOS = 1879048191,
SHT_LOPROC = 1879048192,
SHT_HIPROC = 2147483647,
SHT_LOUSER = 2147483648,
SHT_HIUSER = 4294967295,
};
enum SH_FLAGS_FIELDS {
SHF_WRITE = 0x1,
SHF_ALLOC = 0x2,
SHF_EXECINSTR = 0x4,
SHF_MERGE = 0x10,
SHF_STRINGS = 0x20,
SHF_INFO_LINK = 0x40,
SHF_LINK_ORDER = 0x80,
SHF_OS_NONCONFORMING = 0x100,
SHF_GROUP = 0x200,
SHF_TLS = 0x400,
SHF_COMPRESSED = 0x800,
SHF_MASKOS = 0x0ff00000,
SHF_MASKPROC = 0xf0000000
};
typedef struct {
uint32_t sh_name;
uint32_t sh_type;
uint32_t sh_flags;
uint32_t sh_addr;
uint32_t sh_offset;
uint32_t sh_size;
uint32_t sh_link;
uint32_t sh_info;
uint32_t sh_addralign;
uint32_t sh_entsize;
} elf_section_header_32_t;
typedef struct {
uint32_t sh_name;
uint32_t sh_type;
uint64_t sh_flags;
uint64_t sh_addr;
uint64_t sh_offset;
uint64_t sh_size;
uint32_t sh_link;
uint32_t sh_info;
uint64_t sh_addralign;
uint64_t sh_entsize;
} elf_section_header_64_t;
typedef struct {
uint32_t st_name; // name - index into string table
uint32_t st_value; // symbol value
uint32_t st_size; // symbol size
uint8_t st_info; // type and binding
uint8_t st_other; // 0 - no defined meaning
uint16_t st_shndx; // section header index
} elf_sym_32_t;
typedef struct {
uint32_t st_name;
uint8_t st_info;
uint8_t st_other;
uint16_t st_shndx;
uint64_t st_value;
uint64_t st_size;
} elf_sym_64_t;
enum ST_BINDING_FIELDS {
STB_LOCAL = 0,
STB_GLOBAL = 1,
STB_WEAK = 2,
STB_NUM = 3,
STB_LOPROC = 13,
STB_HIPROC = 15
};
enum ST_TYPE_FIELDS {
STT_NOTYPE = 0,
STT_OBJECT = 1,
STT_FUNC = 2,
STT_SECTION = 3,
STT_FILE = 4,
STT_TLS = 6,
STT_LOPROC = 13,
STT_HIPROC = 15
};
struct proc;
struct file_descriptor;
#ifdef __i386__
#define MACHINE_ARCH EM_386
typedef elf_header_32_t elf_header_t;
typedef elf_section_header_32_t elf_section_header_t;
typedef elf_program_header_32_t elf_program_header_t;
typedef elf_sym_32_t elf_sym_t;
#define USER_STACK_SIZE (16 << 10) // 16KB
#elif __x86_64__
#define MACHINE_ARCH EM_AMD64
typedef elf_header_64_t elf_header_t;
typedef elf_section_header_64_t elf_section_header_t;
typedef elf_program_header_64_t elf_program_header_t;
typedef elf_sym_64_t elf_sym_t;
#define USER_STACK_SIZE (4 << 20) // 4MB
#elif __arm__
#define MACHINE_ARCH EM_ARM
typedef elf_header_32_t elf_header_t;
typedef elf_section_header_32_t elf_section_header_t;
typedef elf_program_header_32_t elf_program_header_t;
typedef elf_sym_32_t elf_sym_t;
#define USER_STACK_SIZE (16 << 10) // 16KB
#elif __aarch64__
#define MACHINE_ARCH EM_AARCH64
typedef elf_header_64_t elf_header_t;
typedef elf_section_header_64_t elf_section_header_t;
typedef elf_program_header_64_t elf_program_header_t;
typedef elf_sym_64_t elf_sym_t;
#define USER_STACK_SIZE (4 << 20) // 4MB
#elif defined(__riscv) && (__riscv_xlen == 64)
#define MACHINE_ARCH EM_RISCV
typedef elf_header_64_t elf_header_t;
typedef elf_section_header_64_t elf_section_header_t;
typedef elf_program_header_64_t elf_program_header_t;
typedef elf_sym_64_t elf_sym_t;
#define USER_STACK_SIZE (4 << 20) // 4MB
#endif
int elf_check_header(elf_header_t* header);
int elf_load(struct proc* p, struct file_descriptor* fd);
int elf_find_symtab_unchecked(void* mapped_data, void** symtab, size_t* symtab_entries, char** strtab);
ssize_t elf_find_function_in_symtab(void* symtab, size_t syms_n, uintptr_t ip);
#endif // _KERNEL_TASKING_ELF_H