mirror of https://github.com/tailix/kernel.git
105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
#ifndef KERNEL_INCLUDED_ELF
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#define KERNEL_INCLUDED_ELF 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct Kernel_ELF_Header {
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unsigned char magic_0x7F : 8; // Must be 0x7F.
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unsigned char magic_E : 8; // Must be 'E'.
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unsigned char magic_L : 8; // Must be 'L'.
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unsigned char magic_F : 8; // Must be 'F'.
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unsigned char bitness : 8; // Must be 1 (32 bit).
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unsigned char endianness : 8; // Must be 1 (little endian).
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unsigned char header_version : 8; // Must be 1.
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unsigned char os_abi : 8; // Must be 0 (System V).
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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; // Must be 2 (executable).
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unsigned short isa : 16; // Must be 3 (x86).
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unsigned long elf_version : 32; // Must be 1.
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unsigned long entrypoint : 32;
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unsigned long prog_table_pos : 32; // Must not be 0.
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unsigned long sect_table_pos : 32;
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unsigned long arch_flags : 32; // Must be 0.
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unsigned short header_size : 16; // Must be 52.
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unsigned short prog_entr_size : 16; // Must not be 0.
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unsigned short prog_entr_num : 16; // Must not be 0.
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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 Kernel_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 Kernel_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 Kernel_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 Kernel_ELF_ProgramEntry Kernel_ELF_ProgramTable[];
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typedef struct Kernel_ELF_SectionEntry Kernel_ELF_SectionTable[];
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typedef struct Kernel_ELF_RelocationEntry Kernel_ELF_RelocationTable[];
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inline static unsigned char Kernel_ELF_Header_is_valid(
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const struct Kernel_ELF_Header *header
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);
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unsigned char Kernel_ELF_Header_is_valid(
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const struct Kernel_ELF_Header *const header
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) {
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return (
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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->bitness == 1 &&
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header->endianness == 1 &&
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header->header_version == 1 &&
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header->os_abi == 0 &&
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header->obj_type == 2 &&
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header->isa == 3 &&
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header->elf_version == 1 &&
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header->arch_flags == 0 &&
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header->header_size == 52 &&
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header->prog_table_pos != 0 &&
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header->prog_entr_size != 0 &&
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header->prog_entr_num != 0
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);
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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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