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https://github.com/danog/ir.git
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102 lines
1.8 KiB
C
102 lines
1.8 KiB
C
/*
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* IR - Lightweight JIT Compilation Framework
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* (ELF header definitions)
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* Copyright (C) 2022 Zend by Perforce.
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* Authors: Dmitry Stogov <dmitry@php.net>
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*/
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#ifndef IR_ELF
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#define IR_ELF
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#if defined(IR_TARGET_X64) || defined(IR_TARGET_AARCH64)
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# define ELF64
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#else
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# undef ELF64
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#endif
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typedef struct _ir_elf_header {
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uint8_t emagic[4];
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uint8_t eclass;
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uint8_t eendian;
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uint8_t eversion;
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uint8_t eosabi;
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uint8_t eabiversion;
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uint8_t epad[7];
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uint16_t type;
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uint16_t machine;
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uint32_t version;
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uintptr_t entry;
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uintptr_t phofs;
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uintptr_t shofs;
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uint32_t flags;
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uint16_t ehsize;
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uint16_t phentsize;
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uint16_t phnum;
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uint16_t shentsize;
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uint16_t shnum;
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uint16_t shstridx;
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} ir_elf_header;
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typedef struct ir_elf_sectheader {
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uint32_t name;
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uint32_t type;
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uintptr_t flags;
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uintptr_t addr;
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uintptr_t ofs;
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uintptr_t size;
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uint32_t link;
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uint32_t info;
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uintptr_t align;
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uintptr_t entsize;
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} ir_elf_sectheader;
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#define ELFSECT_IDX_ABS 0xfff1
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enum {
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ELFSECT_TYPE_PROGBITS = 1,
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ELFSECT_TYPE_SYMTAB = 2,
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ELFSECT_TYPE_STRTAB = 3,
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ELFSECT_TYPE_NOBITS = 8,
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ELFSECT_TYPE_DYNSYM = 11,
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};
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#define ELFSECT_FLAGS_WRITE (1 << 0)
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#define ELFSECT_FLAGS_ALLOC (1 << 1)
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#define ELFSECT_FLAGS_EXEC (1 << 2)
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#define ELFSECT_FLAGS_TLS (1 << 10)
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typedef struct ir_elf_symbol {
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#ifdef ELF64
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uint32_t name;
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uint8_t info;
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uint8_t other;
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uint16_t sectidx;
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uintptr_t value;
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uint64_t size;
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#else
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uint32_t name;
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uintptr_t value;
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uint32_t size;
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uint8_t info;
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uint8_t other;
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uint16_t sectidx;
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#endif
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} ir_elf_symbol;
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#define ELFSYM_BIND(info) ((info) >> 4)
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#define ELFSYM_TYPE(info) ((info) & 0xf)
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#define ELFSYM_INFO(bind, type) (((bind) << 4) | (type))
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enum {
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ELFSYM_TYPE_DATA = 2,
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ELFSYM_TYPE_FUNC = 2,
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ELFSYM_TYPE_FILE = 4,
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};
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enum {
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ELFSYM_BIND_LOCAL = 0,
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ELFSYM_BIND_GLOBAL = 1,
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};
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#endif
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