8cfaf4b974
(it contains the PLT). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15706 a95241bf-73f2-0310-859d-f6bbb57e9c96
310 lines
5.5 KiB
C
310 lines
5.5 KiB
C
/*
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** Copyright 2001, Travis Geiselbrecht. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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#ifndef _ELF32_H
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#define _ELF32_H
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#include <SupportDefs.h>
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#include <ByteOrder.h>
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#include <arch/elf.h>
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typedef uint32 Elf32_Addr;
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typedef uint16 Elf32_Half;
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typedef uint32 Elf32_Off;
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typedef int32 Elf32_Sword;
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typedef uint32 Elf32_Word;
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/*** ELF header ***/
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#define EI_NIDENT 16
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struct Elf32_Ehdr {
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uint8 e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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#ifdef __cplusplus
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bool IsHostEndian() const;
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#endif
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};
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#define ELF_MAGIC "\x7f""ELF"
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// e_ident[] indices
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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_PAD 7
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// architecture class (EI_CLASS)
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#define ELFCLASS32 1
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#define ELFCLASS64 2
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// endian (EI_DATA)
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#define ELFDATA2LSB 1 // little endian
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#define ELFDATA2MSB 2 // big endian
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/*** section header ***/
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struct Elf32_Shdr {
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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};
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// special section indices
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#define SHN_UNDEF 0
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#define SHN_LORESERVE 0xff00
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#define SHN_LOPROC 0xff00
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#define SHN_HIPROC 0xff1f
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#define SHN_ABS 0xfff1
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#define SHN_COMMON 0xfff2
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#define SHN_HIRESERVE 0xffff
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// section header type
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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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#define SHT_LOPROC 0x70000000
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#define SHT_HIPROC 0x7fffffff
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#define SHT_LOUSER 0x80000000
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#define SHT_HIUSER 0xffffffff
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// section header flags
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#define SHF_WRITE 1
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#define SHF_ALLOC 2
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#define SHF_EXECINSTR 4
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#define SHF_MASKPROC 0xf0000000
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/*** program header ***/
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struct Elf32_Phdr {
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Elf32_Word p_type;
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Elf32_Off p_offset; /* offset from the beginning of the file of the segment */
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Elf32_Addr p_vaddr; /* virtual address for the segment in memory */
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz; /* the size of the segment in the file */
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Elf32_Word p_memsz; /* the size of the segment in memory */
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Elf32_Word p_flags;
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Elf32_Word p_align;
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#ifdef __cplusplus
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bool IsReadWrite() const;
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bool IsExecutable() const;
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#endif
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};
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// program header segment 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_LOPROC 0x70000000
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#define PT_HIPROC 0x7fffffff
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// program header segment flags
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#define PF_EXECUTE 0x1
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#define PF_WRITE 0x2
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#define PF_READ 0x4
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#define PF_PROTECTION_MASK (PF_EXECUTE | PF_WRITE | PF_READ)
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#define PF_MASKPROC 0xf0000000
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struct Elf32_Sym {
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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uint8 st_info;
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uint8 st_other;
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Elf32_Half st_shndx;
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#ifdef __cplusplus
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uint8 Bind() const;
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uint8 Type() const;
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#endif
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};
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#define ELF32_ST_BIND(i) ((i) >> 4)
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#define ELF32_ST_TYPE(i) ((i) & 0xf)
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#define ELF32_ST_INFO(b, t) (((b) << 4) + ((t) & 0xf))
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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#define STN_UNDEF 0
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struct Elf32_Rel {
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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#ifdef __cplusplus
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uint8 SymbolIndex() const;
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uint8 Type() const;
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#endif
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};
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#ifdef __cplusplus
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struct Elf32_Rela : public Elf32_Rel {
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#else
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struct Elf32_Rela {
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Elf32_Addr r_offset;
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Elf32_Word r_info;
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#endif
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Elf32_Sword r_addend;
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};
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#define ELF32_R_SYM(i) ((i) >> 8)
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#define ELF32_R_TYPE(i) ((unsigned char)(i))
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#define ELF32_R_INFO(s, t) (((s) << 8) + (unsigned char)(t))
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struct Elf32_Dyn {
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Elf32_Sword d_tag;
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union {
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Elf32_Word d_val;
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Elf32_Addr d_ptr;
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} d_un;
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};
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#define DT_NULL 0
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#define DT_NEEDED 1
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#define DT_PLTRELSZ 2
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#define DT_PLTGOT 3
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#define DT_HASH 4
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#define DT_STRTAB 5
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#define DT_SYMTAB 6
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#define DT_RELA 7
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#define DT_RELASZ 8
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#define DT_RELAENT 9
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#define DT_STRSZ 10
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#define DT_SYMENT 11
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#define DT_INIT 12
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#define DT_FINI 13
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#define DT_SONAME 14
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#define DT_RPATH 15
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#define DT_SYMBOLIC 16
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#define DT_REL 17
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#define DT_RELSZ 18
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#define DT_RELENT 19
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#define DT_PLTREL 20
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#define DT_DEBUG 21
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#define DT_TEXTREL 22
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#define DT_JMPREL 23
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#define DT_LOPROC 0x70000000
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#define DT_HIPROC 0x7fffffff
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/*** inline functions ***/
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#ifdef __cplusplus
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inline bool
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Elf32_Ehdr::IsHostEndian() const
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{
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#if B_HOST_IS_LENDIAN
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return e_ident[EI_DATA] == ELFDATA2LSB;
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#elif B_HOST_IS_BENDIAN
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return e_ident[EI_DATA] == ELFDATA2MSB;
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#endif
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}
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inline bool
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Elf32_Phdr::IsReadWrite() const
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{
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return !(~p_flags & (PF_READ | PF_WRITE));
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}
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inline bool
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Elf32_Phdr::IsExecutable() const
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{
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return (p_flags & PF_PROTECTION_MASK) == (PF_READ | PF_EXECUTE);
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}
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inline uint8
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Elf32_Sym::Bind() const
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{
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return ELF32_ST_BIND(st_info);
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}
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inline uint8
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Elf32_Sym::Type() const
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{
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return ELF32_ST_TYPE(st_info);
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}
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inline uint8
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Elf32_Rel::SymbolIndex() const
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{
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return ELF32_R_SYM(r_info);
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}
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inline uint8
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Elf32_Rel::Type() const
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{
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return ELF32_R_TYPE(r_info);
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}
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#endif /* __cplusplus */
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#endif /* _ELF32_H_ */
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