mirror of https://github.com/tailix/libkernaux.git
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
#ifndef KERNAUX_INCLUDED_ELF
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#define KERNAUX_INCLUDED_ELF 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdbool.h>
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struct KernAux_ELF_Header {
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unsigned char magic_0x7F : 8;
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unsigned char magic_E : 8;
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unsigned char magic_L : 8;
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unsigned char magic_F : 8;
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unsigned char bitness : 8;
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unsigned char endianness : 8;
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unsigned char header_version : 8;
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unsigned char os_abi : 8;
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unsigned long unused1 : 32;
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unsigned long unused2 : 32;
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unsigned short obj_type : 16;
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unsigned short isa : 16;
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unsigned long elf_version : 32;
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unsigned long entrypoint : 32;
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unsigned long prog_table_pos : 32;
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unsigned long sect_table_pos : 32;
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unsigned long arch_flags : 32;
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unsigned short header_size : 16;
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unsigned short prog_entr_size : 16;
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unsigned short prog_entr_num : 16;
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unsigned short sect_entr_size : 16;
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unsigned short sect_entr_num : 16;
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unsigned short sect_names_idx : 16;
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}
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__attribute__((packed));
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struct KernAux_ELF_ProgramEntry {
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unsigned long type : 32;
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unsigned long offset : 32;
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unsigned long virt_addr : 32;
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unsigned long phys_addr : 32;
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unsigned long file_size : 32;
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unsigned long mem_size : 32;
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unsigned long flags : 32;
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unsigned long align : 32;
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}
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__attribute__((packed));
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struct KernAux_ELF_SectionEntry {
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unsigned long name : 32;
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unsigned long type : 32;
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unsigned long flags : 32;
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unsigned long vaddr : 32;
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unsigned long file_offset : 32;
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unsigned long file_size : 32;
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unsigned long link : 32;
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unsigned long info : 32;
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unsigned long alignment : 32;
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unsigned long ent_size : 32;
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}
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__attribute__((packed));
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struct KernAux_ELF_RelocationEntry {
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unsigned long virt_addr : 32;
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unsigned long info : 32;
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}
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__attribute__((packed));
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typedef struct KernAux_ELF_ProgramEntry KernAux_ELF_ProgramTable[];
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typedef struct KernAux_ELF_SectionEntry KernAux_ELF_SectionTable[];
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typedef struct KernAux_ELF_RelocationEntry KernAux_ELF_RelocationTable[];
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inline static bool KernAux_ELF_Header_is_valid(
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const struct KernAux_ELF_Header *header
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);
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bool KernAux_ELF_Header_is_valid(
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const struct KernAux_ELF_Header *const header
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) {
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if (!(
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header->magic_0x7F == 0x7F &&
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header->magic_E == 'E' &&
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header->magic_L == 'L' &&
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header->magic_F == 'F' &&
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header->header_version == 1 &&
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header->elf_version == 1
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)) {
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return false;
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}
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if (!(
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header->bitness == 1 || // 32 bit
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header->bitness == 2 // 64 bit
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)) {
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return false;
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}
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if (!(
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header->endianness == 1 || // Little endian
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header->endianness == 2 // Big endian
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)) {
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return false;
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}
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if (!(
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header->os_abi >= 0 &&
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header->os_abi <= 0x12 &&
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header->os_abi != 0x05
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)) {
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return false;
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}
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if (!(
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header->obj_type == 0x00 || // NONE
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header->obj_type == 0x01 || // REL
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header->obj_type == 0x02 || // EXEC
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header->obj_type == 0x03 || // DYN
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header->obj_type == 0x04 || // CORE
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header->obj_type == 0xFE00 || // LOOS
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header->obj_type == 0xFEFF || // HIOS
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header->obj_type == 0xFF00 || // LOPROC
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header->obj_type == 0xFFFF // HIPROC
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)) {
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return false;
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}
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return true;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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