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196
boot/libboot/elf/elf_lite.h
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196
boot/libboot/elf/elf_lite.h
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#ifndef _BOOT_LIBBOOT_ELF_ELF_LITE
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#define _BOOT_LIBBOOT_ELF_ELF_LITE
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#include <libboot/abi/drivers.h>
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#include <libboot/fs/ext2_lite.h>
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#include <libboot/types.h>
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enum E_IDENT_FIELDS {
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EI_MAG0,
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EI_MAG1,
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EI_MAG2,
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EI_MAG3,
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EI_CLASS,
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EI_DATA,
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EI_VERSION,
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EI_OSABI,
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EI_ABIVERSION,
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};
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enum E_TYPE_FIELDS {
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ET_NONE,
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ET_REL,
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ET_EXEC,
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ET_DYN,
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ET_CORE,
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};
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enum E_MACHINE_FIELDS {
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EM_NONE,
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EM_386 = 3,
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EM_PPC = 20,
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EM_PPC64 = 21,
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EM_X86_64 = 62,
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};
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typedef struct {
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uint8_t e_ident[16];
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uint16_t e_type;
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uint16_t e_machine;
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uint32_t e_version;
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uint32_t e_entry;
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uint32_t e_phoff;
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uint32_t e_shoff;
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uint32_t e_flags;
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uint16_t e_ehsize;
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uint16_t e_phentsize;
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uint16_t e_phnum;
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uint16_t e_shentsize;
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uint16_t e_shnum;
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uint16_t e_shstrndx;
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} elf_header_32_t;
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typedef struct {
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uint8_t e_ident[16];
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uint16_t e_type;
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uint16_t e_machine;
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uint32_t e_version;
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uint64_t e_entry;
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uint64_t e_phoff;
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uint64_t e_shoff;
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uint32_t e_flags;
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uint16_t e_ehsize;
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uint16_t e_phentsize;
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uint16_t e_phnum;
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uint16_t e_shentsize;
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uint16_t e_shnum;
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uint16_t e_shstrndx;
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} elf_header_64_t;
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enum P_TYPE_FIELDS {
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PT_NULL,
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PT_LOAD,
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PT_DYNAMIC,
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PT_INTERP,
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PT_NOTE,
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PT_SHLIB,
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PT_PHDR,
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PT_TLS,
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PT_LOOS = 0x60000000,
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PT_HIOS = 0x6FFFFFFF,
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PT_LOPROC = 0x70000000,
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PT_HIPROC = 0x7FFFFFFF,
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};
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typedef struct {
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uint32_t p_type;
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uint32_t p_offset;
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uint32_t p_vaddr;
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uint32_t p_paddr;
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uint32_t p_filesz;
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uint16_t p_memsz;
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uint16_t p_flags;
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uint16_t p_align;
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} elf_program_header_32_t;
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typedef struct {
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uint32_t p_type;
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uint32_t p_flags;
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uint64_t p_offset;
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uint64_t p_vaddr;
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uint64_t p_paddr;
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uint64_t p_filesz;
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uint64_t p_memsz;
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uint64_t p_align;
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} elf_program_header_64_t;
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enum SH_TYPE_FIELDS {
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SHT_NULL,
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SHT_PROGBITS,
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SHT_SYMTAB,
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SHT_STRTAB,
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SHT_RELA,
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SHT_HASH,
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SHT_DYNAMIC,
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SHT_NOTE,
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SHT_NOBITS,
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SHT_REL,
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SHT_SHLIB,
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SHT_DYNSYM,
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SHT_INIT_ARRAY,
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SHT_FINI_ARRAY,
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SHT_PREINIT_ARRAY,
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SHT_GROUP,
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SHT_SYMTAB_SHNDX,
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SHT_LOOS = 1610612736,
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SHT_HIOS = 1879048191,
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SHT_LOPROC = 1879048192,
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SHT_HIPROC = 2147483647,
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SHT_LOUSER = 2147483648,
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SHT_HIUSER = 4294967295,
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};
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enum SH_FLAGS_FIELDS {
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SHF_WRITE = 0x1,
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SHF_ALLOC = 0x2,
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SHF_EXECINSTR = 0x4,
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SHF_MERGE = 0x10,
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SHF_STRINGS = 0x20,
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SHF_INFO_LINK = 0x40,
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SHF_LINK_ORDER = 0x80,
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SHF_OS_NONCONFORMING = 0x100,
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SHF_GROUP = 0x200,
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SHF_TLS = 0x400,
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SHF_COMPRESSED = 0x800,
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SHF_MASKOS = 0x0ff00000,
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SHF_MASKPROC = 0xf0000000
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};
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typedef struct {
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uint32_t sh_name;
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uint32_t sh_type;
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uint32_t sh_flags;
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uint32_t sh_addr;
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uint32_t sh_offset;
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uint32_t sh_size;
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uint32_t sh_link;
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uint32_t sh_info;
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uint32_t sh_addralign;
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uint32_t sh_entsize;
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} elf_section_header_32_t;
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typedef struct {
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uint32_t sh_name;
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uint32_t sh_type;
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uint64_t sh_flags;
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uint64_t sh_addr;
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uint64_t sh_offset;
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uint64_t sh_size;
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uint32_t sh_link;
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uint32_t sh_info;
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uint64_t sh_addralign;
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uint64_t sh_entsize;
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} elf_section_header_64_t;
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struct elfctx {
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drive_desc_t* drive_desc;
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fs_desc_t* fs_desc;
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inode_t file_inode;
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elf_header_32_t header;
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};
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typedef struct elfctx elfctx_t;
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int elf_init_ctx(drive_desc_t* drive_desc, fs_desc_t* fs_desc, const char* path, elfctx_t* elfctx);
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int elf_read_program_header(elfctx_t* elfctx, size_t id, elf_program_header_32_t* program_header);
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int elf_read_section_header(elfctx_t* elfctx, uint32_t id, elf_section_header_32_t* section_header);
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#ifdef BITS32
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int elf_load_kernel(drive_desc_t* drive_desc, fs_desc_t* fs_desc, const char* path, size_t* kernel_vaddr, size_t* kernel_paddr, size_t* kernel_size);
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#else
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size_t elf_get_kernel_size(void* elffile);
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int elf_load_kernel(void* elffile, size_t size, uintptr_t* kernel_vaddr, uintptr_t* kernel_paddr);
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#endif
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#endif // _BOOT_LIBBOOT_ELF_ELF_LITE
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