226 lines
6.7 KiB
C
226 lines
6.7 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* elf64.h - ELF64 structures for kernel loading
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* Minimal ELF64 definitions for the UEFI loader
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*/
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#ifndef STARKERNEL_ELF64_H
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#define STARKERNEL_ELF64_H
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#include <stdint.h>
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/* ELF identification */
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#define EI_MAG0 0
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#define EI_MAG1 1
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#define EI_MAG2 2
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#define EI_MAG3 3
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#define EI_CLASS 4
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#define EI_DATA 5
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#define EI_VERSION 6
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#define EI_OSABI 7
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#define EI_ABIVERSION 8
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#define EI_PAD 9
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#define EI_NIDENT 16
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/* ELF magic number */
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#define ELFMAG0 0x7F
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#define ELFMAG1 'E'
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#define ELFMAG2 'L'
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#define ELFMAG3 'F'
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/* ELF class */
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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/* ELF data encoding */
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#define ELFDATA2LSB 1 /* Little-endian */
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#define ELFDATA2MSB 2 /* Big-endian */
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/* ELF version */
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#define EV_CURRENT 1
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/* ELF OS/ABI */
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#define ELFOSABI_NONE 0 /* UNIX System V ABI */
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/* ELF types */
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#define ET_NONE 0
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#define ET_REL 1
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#define ET_EXEC 2
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#define ET_DYN 3
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#define ET_CORE 4
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/* ELF machine types */
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#define EM_X86_64 62 /* AMD x86-64 */
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#define EM_AARCH64 183 /* ARM AARCH64 */
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#define EM_RISCV 243 /* RISC-V */
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/* Program header types */
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#define PT_NULL 0
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#define PT_LOAD 1
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#define PT_DYNAMIC 2
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#define PT_INTERP 3
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#define PT_NOTE 4
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#define PT_SHLIB 5
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#define PT_PHDR 6
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#define PT_TLS 7
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/* Program header flags */
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#define PF_X 0x1 /* Execute */
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#define PF_W 0x2 /* Write */
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#define PF_R 0x4 /* Read */
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/* Section header types */
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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/* Relocation types (x86_64) */
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#define R_X86_64_NONE 0
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#define R_X86_64_64 1
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#define R_X86_64_PC32 2
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#define R_X86_64_RELATIVE 8
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#define R_X86_64_32 10
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#define R_X86_64_32S 11
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/* Relocation types (aarch64) */
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#define R_AARCH64_NONE 0
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#define R_AARCH64_ABS64 257
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#define R_AARCH64_RELATIVE 1027
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/* Relocation types (riscv64) */
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#define R_RISCV_NONE 0
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#define R_RISCV_64 2
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#define R_RISCV_RELATIVE 3
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/* ELF64 types */
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typedef uint64_t Elf64_Addr;
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typedef uint64_t Elf64_Off;
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typedef uint16_t Elf64_Half;
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typedef uint32_t Elf64_Word;
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typedef int32_t Elf64_Sword;
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typedef uint64_t Elf64_Xword;
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typedef int64_t Elf64_Sxword;
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/* ELF64 header */
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typedef struct {
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unsigned char e_ident[EI_NIDENT]; /* ELF identification */
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Elf64_Half e_type; /* Object file type */
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Elf64_Half e_machine; /* Machine type */
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Elf64_Word e_version; /* Object file version */
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Elf64_Addr e_entry; /* Entry point address */
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Elf64_Off e_phoff; /* Program header offset */
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Elf64_Off e_shoff; /* Section header offset */
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Elf64_Word e_flags; /* Processor-specific flags */
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Elf64_Half e_ehsize; /* ELF header size */
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Elf64_Half e_phentsize; /* Size of program header entry */
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Elf64_Half e_phnum; /* Number of program header entries */
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Elf64_Half e_shentsize; /* Size of section header entry */
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Elf64_Half e_shnum; /* Number of section header entries */
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Elf64_Half e_shstrndx; /* Section name string table index */
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} Elf64_Ehdr;
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/* ELF64 program header */
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typedef struct {
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Elf64_Word p_type; /* Segment type */
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Elf64_Word p_flags; /* Segment flags */
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Elf64_Off p_offset; /* Segment file offset */
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Elf64_Addr p_vaddr; /* Segment virtual address */
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Elf64_Addr p_paddr; /* Segment physical address */
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Elf64_Xword p_filesz; /* Segment size in file */
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Elf64_Xword p_memsz; /* Segment size in memory */
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Elf64_Xword p_align; /* Segment alignment */
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} Elf64_Phdr;
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/* ELF64 section header */
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typedef struct {
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Elf64_Word sh_name; /* Section name (string table index) */
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Elf64_Word sh_type; /* Section type */
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Elf64_Xword sh_flags; /* Section flags */
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Elf64_Addr sh_addr; /* Section virtual addr at execution */
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Elf64_Off sh_offset; /* Section file offset */
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Elf64_Xword sh_size; /* Section size in bytes */
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Elf64_Word sh_link; /* Link to another section */
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Elf64_Word sh_info; /* Additional section information */
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Elf64_Xword sh_addralign; /* Section alignment */
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Elf64_Xword sh_entsize; /* Entry size if section holds table */
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} Elf64_Shdr;
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/* ELF64 relocation with addend */
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typedef struct {
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Elf64_Addr r_offset; /* Address */
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Elf64_Xword r_info; /* Relocation type and symbol index */
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Elf64_Sxword r_addend; /* Addend */
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} Elf64_Rela;
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typedef struct {
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Elf64_Word st_name;
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unsigned char st_info;
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unsigned char st_other;
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Elf64_Half st_shndx;
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Elf64_Addr st_value;
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Elf64_Xword st_size;
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} Elf64_Sym;
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/* ELF64 relocation without addend */
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typedef struct {
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Elf64_Addr r_offset; /* Address */
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Elf64_Xword r_info; /* Relocation type and symbol index */
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} Elf64_Rel;
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/* Extract relocation symbol and type from r_info */
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#define ELF64_R_SYM(i) ((i) >> 32)
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#define ELF64_R_TYPE(i) ((i) & 0xffffffffL)
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#define ELF64_R_INFO(s,t) (((Elf64_Xword)(s) << 32) + ((Elf64_Xword)(t) & 0xffffffffL))
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#endif /* STARKERNEL_ELF64_H */
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