382 lines
18 KiB
C
382 lines
18 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2018/08/29 Bernard first version
|
||
|
|
* 2021/04/23 chunyexixiaoyu distinguish 32-bit and 64-bit
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef DL_ELF_H__
|
||
|
|
#define DL_ELF_H__
|
||
|
|
|
||
|
|
typedef rt_uint8_t Elf_Byte;
|
||
|
|
|
||
|
|
typedef rt_uint32_t Elf32_Addr; /* Unsigned program address */
|
||
|
|
typedef rt_uint32_t Elf32_Off; /* Unsigned file offset */
|
||
|
|
typedef rt_int32_t Elf32_Sword; /* Signed large integer */
|
||
|
|
typedef rt_uint32_t Elf32_Word; /* Unsigned large integer */
|
||
|
|
typedef rt_uint16_t Elf32_Half; /* Unsigned medium integer */
|
||
|
|
|
||
|
|
typedef rt_uint64_t Elf64_Addr;
|
||
|
|
typedef rt_uint16_t Elf64_Half;
|
||
|
|
typedef rt_int16_t Elf64_SHalf;
|
||
|
|
typedef rt_uint64_t Elf64_Off;
|
||
|
|
typedef rt_int32_t Elf64_Sword;
|
||
|
|
typedef rt_uint32_t Elf64_Word;
|
||
|
|
typedef rt_uint64_t Elf64_Xword;
|
||
|
|
typedef rt_int64_t Elf64_Sxword;
|
||
|
|
typedef rt_uint16_t Elf64_Section;
|
||
|
|
|
||
|
|
/* e_ident[] magic number */
|
||
|
|
#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */
|
||
|
|
#define ELFMAG1 'E' /* e_ident[EI_MAG1] */
|
||
|
|
#define ELFMAG2 'L' /* e_ident[EI_MAG2] */
|
||
|
|
#define ELFMAG3 'F' /* e_ident[EI_MAG3] */
|
||
|
|
#define RTMMAG "\177RTM" /* magic */
|
||
|
|
#define ELFMAG "\177ELF" /* magic */
|
||
|
|
#define SELFMAG 4 /* size of magic */
|
||
|
|
|
||
|
|
#define EI_CLASS 4 /* file class */
|
||
|
|
#define EI_NIDENT 16 /* Size of e_ident[] */
|
||
|
|
|
||
|
|
/* e_ident[] file class */
|
||
|
|
#define ELFCLASSNONE 0 /* invalid */
|
||
|
|
#define ELFCLASS32 1 /* 32-bit objs */
|
||
|
|
#define ELFCLASS64 2 /* 64-bit objs */
|
||
|
|
#define ELFCLASSNUM 3 /* number of classes */
|
||
|
|
|
||
|
|
/* e_ident[] data encoding */
|
||
|
|
#define ELFDATANONE 0 /* invalid */
|
||
|
|
#define ELFDATA2LSB 1 /* Little-Endian */
|
||
|
|
#define ELFDATA2MSB 2 /* Big-Endian */
|
||
|
|
#define ELFDATANUM 3 /* number of data encode defines */
|
||
|
|
|
||
|
|
/* e_ident */
|
||
|
|
#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \
|
||
|
|
(ehdr).e_ident[EI_MAG1] == ELFMAG1 && \
|
||
|
|
(ehdr).e_ident[EI_MAG2] == ELFMAG2 && \
|
||
|
|
(ehdr).e_ident[EI_MAG3] == ELFMAG3)
|
||
|
|
|
||
|
|
#define ET_NONE 0 /* No file type */
|
||
|
|
#define ET_REL 1 /* Relocatable file */
|
||
|
|
#define ET_EXEC 2 /* Executable file */
|
||
|
|
#define ET_DYN 3 /* Shared object file */
|
||
|
|
#define ET_CORE 4 /* Core file */
|
||
|
|
|
||
|
|
/* ELF Header */
|
||
|
|
typedef struct elfhdr
|
||
|
|
{
|
||
|
|
unsigned char e_ident[EI_NIDENT]; /* ELF Identification */
|
||
|
|
Elf32_Half e_type; /* object file type */
|
||
|
|
Elf32_Half e_machine; /* machine */
|
||
|
|
Elf32_Word e_version; /* object file version */
|
||
|
|
Elf32_Addr e_entry; /* virtual entry point */
|
||
|
|
Elf32_Off e_phoff; /* program header table offset */
|
||
|
|
Elf32_Off e_shoff; /* section header table offset */
|
||
|
|
Elf32_Word e_flags; /* processor-specific flags */
|
||
|
|
Elf32_Half e_ehsize; /* ELF header size */
|
||
|
|
Elf32_Half e_phentsize; /* program header entry size */
|
||
|
|
Elf32_Half e_phnum; /* number of program header entries */
|
||
|
|
Elf32_Half e_shentsize; /* section header entry size */
|
||
|
|
Elf32_Half e_shnum; /* number of section header entries */
|
||
|
|
Elf32_Half e_shstrndx; /* section header table's "section
|
||
|
|
header string table" entry offset */
|
||
|
|
} Elf32_Ehdr;
|
||
|
|
|
||
|
|
typedef struct elf64_hdr
|
||
|
|
{
|
||
|
|
unsigned char e_ident[EI_NIDENT]; /* ELF Identification */
|
||
|
|
Elf64_Half e_type; /* object file type */
|
||
|
|
Elf64_Half e_machine; /* machine */
|
||
|
|
Elf64_Word e_version; /* object file version */
|
||
|
|
Elf64_Addr e_entry; /* virtual entry point */
|
||
|
|
Elf64_Off e_phoff; /* program header table offset */
|
||
|
|
Elf64_Off e_shoff; /* section header table offset */
|
||
|
|
Elf64_Word e_flags; /* processor-specific flags */
|
||
|
|
Elf64_Half e_ehsize; /* ELF header size */
|
||
|
|
Elf64_Half e_phentsize; /* program header entry size */
|
||
|
|
Elf64_Half e_phnum; /* number of program header entries */
|
||
|
|
Elf64_Half e_shentsize; /* section header entry size */
|
||
|
|
Elf64_Half e_shnum; /* number of section header entries */
|
||
|
|
Elf64_Half e_shstrndx; /* section header table's "section
|
||
|
|
header string table" entry offset */
|
||
|
|
} Elf64_Ehdr;
|
||
|
|
|
||
|
|
/* Section Header */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf32_Word sh_name; /* name - index into section header
|
||
|
|
string table section */
|
||
|
|
Elf32_Word sh_type; /* type */
|
||
|
|
Elf32_Word sh_flags; /* flags */
|
||
|
|
Elf32_Addr sh_addr; /* address */
|
||
|
|
Elf32_Off sh_offset; /* file offset */
|
||
|
|
Elf32_Word sh_size; /* section size */
|
||
|
|
Elf32_Word sh_link; /* section header table index link */
|
||
|
|
Elf32_Word sh_info; /* extra information */
|
||
|
|
Elf32_Word sh_addralign; /* address alignment */
|
||
|
|
Elf32_Word sh_entsize; /* section entry size */
|
||
|
|
} Elf32_Shdr;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf64_Word sh_name; /* Section name (string tbl index) */
|
||
|
|
Elf64_Word sh_type; /* Section type */
|
||
|
|
Elf64_Xword sh_flags; /* Section flags */
|
||
|
|
Elf64_Addr sh_addr; /* Section virtual addr at execution */
|
||
|
|
Elf64_Off sh_offset; /* Section file offset */
|
||
|
|
Elf64_Xword sh_size; /* Section size in bytes */
|
||
|
|
Elf64_Word sh_link; /* Link to another section */
|
||
|
|
Elf64_Word sh_info; /* Additional section information */
|
||
|
|
Elf64_Xword sh_addralign; /* Section alignment */
|
||
|
|
Elf64_Xword sh_entsize; /* Entry size if section holds table */
|
||
|
|
} Elf64_Shdr;
|
||
|
|
|
||
|
|
/* Section names */
|
||
|
|
#define ELF_BSS ".bss" /* uninitialized data */
|
||
|
|
#define ELF_DATA ".data" /* initialized data */
|
||
|
|
#define ELF_DEBUG ".debug" /* debug */
|
||
|
|
#define ELF_DYNAMIC ".dynamic" /* dynamic linking information */
|
||
|
|
#define ELF_DYNSTR ".dynstr" /* dynamic string table */
|
||
|
|
#define ELF_DYNSYM ".dynsym" /* dynamic symbol table */
|
||
|
|
#define ELF_FINI ".fini" /* termination code */
|
||
|
|
#define ELF_GOT ".got" /* global offset table */
|
||
|
|
#define ELF_HASH ".hash" /* symbol hash table */
|
||
|
|
#define ELF_INIT ".init" /* initialization code */
|
||
|
|
#define ELF_REL_DATA ".rel.data" /* relocation data */
|
||
|
|
#define ELF_REL_FINI ".rel.fini" /* relocation termination code */
|
||
|
|
#define ELF_REL_INIT ".rel.init" /* relocation initialization code */
|
||
|
|
#define ELF_REL_DYN ".rel.dyn" /* relocaltion dynamic link info */
|
||
|
|
#define ELF_REL_RODATA ".rel.rodata" /* relocation read-only data */
|
||
|
|
#define ELF_REL_TEXT ".rel.text" /* relocation code */
|
||
|
|
#define ELF_RODATA ".rodata" /* read-only data */
|
||
|
|
#define ELF_SHSTRTAB ".shstrtab" /* section header string table */
|
||
|
|
#define ELF_STRTAB ".strtab" /* string table */
|
||
|
|
#define ELF_SYMTAB ".symtab" /* symbol table */
|
||
|
|
#define ELF_TEXT ".text" /* code */
|
||
|
|
#define ELF_RTMSYMTAB "RTMSymTab"
|
||
|
|
|
||
|
|
/* Symbol Table Entry */
|
||
|
|
typedef struct elf32_sym
|
||
|
|
{
|
||
|
|
Elf32_Word st_name; /* name - index into string table */
|
||
|
|
Elf32_Addr st_value; /* symbol value */
|
||
|
|
Elf32_Word st_size; /* symbol size */
|
||
|
|
unsigned char st_info; /* type and binding */
|
||
|
|
unsigned char st_other; /* 0 - no defined meaning */
|
||
|
|
Elf32_Half st_shndx; /* section header index */
|
||
|
|
} Elf32_Sym;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf64_Word st_name; /* Symbol name (string tbl index) */
|
||
|
|
unsigned char st_info; /* Symbol type and binding */
|
||
|
|
unsigned char st_other; /* Symbol visibility */
|
||
|
|
Elf64_Section st_shndx; /* Section index */
|
||
|
|
Elf64_Addr st_value; /* Symbol value */
|
||
|
|
Elf64_Xword st_size; /* Symbol size */
|
||
|
|
} Elf64_Sym;
|
||
|
|
|
||
|
|
#define STB_LOCAL 0 /* BIND */
|
||
|
|
#define STB_GLOBAL 1
|
||
|
|
#define STB_WEAK 2
|
||
|
|
#define STB_NUM 3
|
||
|
|
|
||
|
|
#define STB_LOPROC 13 /* processor specific range */
|
||
|
|
#define STB_HIPROC 15
|
||
|
|
|
||
|
|
#define STT_NOTYPE 0 /* symbol type is unspecified */
|
||
|
|
#define STT_OBJECT 1 /* data object */
|
||
|
|
#define STT_FUNC 2 /* code object */
|
||
|
|
#define STT_SECTION 3 /* symbol identifies an ELF section */
|
||
|
|
#define STT_FILE 4 /* symbol's name is file name */
|
||
|
|
#define STT_COMMON 5 /* common data object */
|
||
|
|
#define STT_TLS 6 /* thread-local data object */
|
||
|
|
#define STT_NUM 7 /* # defined types in generic range */
|
||
|
|
#define STT_LOOS 10 /* OS specific range */
|
||
|
|
#define STT_HIOS 12
|
||
|
|
#define STT_LOPROC 13 /* processor specific range */
|
||
|
|
#define STT_HIPROC 15
|
||
|
|
|
||
|
|
#define STN_UNDEF 0 /* undefined */
|
||
|
|
|
||
|
|
#define ELF_ST_BIND(info) ((info) >> 4)
|
||
|
|
#define ELF_ST_TYPE(info) ((info) & 0xf)
|
||
|
|
#define ELF_ST_INFO(bind, type) (((bind)<<4)+((type)&0xf))
|
||
|
|
|
||
|
|
/* Relocation entry with implicit addend */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf32_Addr r_offset; /* offset of relocation */
|
||
|
|
Elf32_Word r_info; /* symbol table index and type */
|
||
|
|
} Elf32_Rel;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf64_Addr r_offset; /* Address */
|
||
|
|
Elf64_Xword r_info; /* Relocation type and symbol index */
|
||
|
|
} Elf64_Rel;
|
||
|
|
|
||
|
|
/* Relocation entry with explicit addend */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf32_Addr r_offset; /* offset of relocation */
|
||
|
|
Elf32_Word r_info; /* symbol table index and type */
|
||
|
|
Elf32_Sword r_addend;
|
||
|
|
} Elf32_Rela;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf64_Addr r_offset; /* Address */
|
||
|
|
Elf64_Xword r_info; /* Relocation type and symbol index */
|
||
|
|
Elf64_Sxword r_addend; /* Addend */
|
||
|
|
} Elf64_Rela;
|
||
|
|
|
||
|
|
/* Extract relocation info - r_info */
|
||
|
|
#define ELF32_R_SYM(i) ((i) >> 8)
|
||
|
|
#define ELF32_R_TYPE(i) ((unsigned char) (i))
|
||
|
|
#define ELF32_R_INFO(s,t) (((s) << 8) + (unsigned char)(t))
|
||
|
|
|
||
|
|
#define ELF64_R_SYM(i) ((i) >> 32)
|
||
|
|
#define ELF64_R_TYPE(i) ((i) & 0xffffffff)
|
||
|
|
#define ELF64_R_INFO(sym,type) ((((Elf64_Xword) (sym)) << 32) + (type))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Relocation type for arm
|
||
|
|
*/
|
||
|
|
#define R_ARM_NONE 0
|
||
|
|
#define R_ARM_PC24 1
|
||
|
|
#define R_ARM_ABS32 2
|
||
|
|
#define R_ARM_REL32 3
|
||
|
|
#define R_ARM_THM_CALL 10
|
||
|
|
#define R_ARM_GLOB_DAT 21
|
||
|
|
#define R_ARM_JUMP_SLOT 22
|
||
|
|
#define R_ARM_RELATIVE 23
|
||
|
|
#define R_ARM_GOT_BREL 26
|
||
|
|
#define R_ARM_PLT32 27
|
||
|
|
#define R_ARM_CALL 28
|
||
|
|
#define R_ARM_JUMP24 29
|
||
|
|
#define R_ARM_THM_JUMP24 30
|
||
|
|
#define R_ARM_V4BX 40
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Relocation type for x86
|
||
|
|
*/
|
||
|
|
#define R_386_NONE 0
|
||
|
|
#define R_386_32 1
|
||
|
|
#define R_386_PC32 2
|
||
|
|
#define R_386_GOT32 3
|
||
|
|
#define R_386_PLT32 4
|
||
|
|
#define R_386_COPY 5
|
||
|
|
#define R_386_GLOB_DAT 6
|
||
|
|
#define R_386_JMP_SLOT 7
|
||
|
|
#define R_386_RELATIVE 8
|
||
|
|
#define R_386_GOTOFF 9
|
||
|
|
#define R_386_GOTPC 10
|
||
|
|
|
||
|
|
/* Program Header */
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf32_Word p_type; /* segment type */
|
||
|
|
Elf32_Off p_offset; /* segment offset */
|
||
|
|
Elf32_Addr p_vaddr; /* virtual address of segment */
|
||
|
|
Elf32_Addr p_paddr; /* physical address - ignored? */
|
||
|
|
Elf32_Word p_filesz; /* number of bytes in file for seg. */
|
||
|
|
Elf32_Word p_memsz; /* number of bytes in mem. for seg. */
|
||
|
|
Elf32_Word p_flags; /* flags */
|
||
|
|
Elf32_Word p_align; /* memory alignment */
|
||
|
|
} Elf32_Phdr;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
Elf64_Word p_type; /* Segment type */
|
||
|
|
Elf64_Word p_flags; /* Segment flags */
|
||
|
|
Elf64_Off p_offset; /* Segment file offset */
|
||
|
|
Elf64_Addr p_vaddr; /* Segment virtual address */
|
||
|
|
Elf64_Addr p_paddr; /* Segment physical address */
|
||
|
|
Elf64_Xword p_filesz; /* Segment size in file */
|
||
|
|
Elf64_Xword p_memsz; /* Segment size in memory */
|
||
|
|
Elf64_Xword p_align; /* Segment alignment */
|
||
|
|
} Elf64_Phdr;
|
||
|
|
|
||
|
|
/* p_type */
|
||
|
|
#define PT_NULL 0
|
||
|
|
#define PT_LOAD 1
|
||
|
|
#define PT_DYNAMIC 2
|
||
|
|
#define PT_INTERP 3
|
||
|
|
#define PT_NOTE 4
|
||
|
|
#define PT_SHLIB 5
|
||
|
|
#define PT_PHDR 6
|
||
|
|
#define PT_TLS 7
|
||
|
|
#define PT_NUM 8
|
||
|
|
#define PT_LOOS 0x60000000
|
||
|
|
#define PT_HIOS 0x6fffffff
|
||
|
|
#define PT_LOPROC 0x70000000
|
||
|
|
#define PT_HIPROC 0x7fffffff
|
||
|
|
|
||
|
|
/* p_flags */
|
||
|
|
#define PF_X 1
|
||
|
|
#define PF_W 2
|
||
|
|
#define PF_R 4
|
||
|
|
|
||
|
|
/* sh_type */
|
||
|
|
#define SHT_NULL 0 /* inactive */
|
||
|
|
#define SHT_PROGBITS 1 /* program defined information */
|
||
|
|
#define SHT_SYMTAB 2 /* symbol table section */
|
||
|
|
#define SHT_STRTAB 3 /* string table section */
|
||
|
|
#define SHT_RELA 4 /* relocation section with addends*/
|
||
|
|
#define SHT_HASH 5 /* symbol hash table section */
|
||
|
|
#define SHT_DYNAMIC 6 /* dynamic section */
|
||
|
|
#define SHT_NOTE 7 /* note section */
|
||
|
|
#define SHT_NOBITS 8 /* no space section */
|
||
|
|
#define SHT_REL 9 /* relocation section without addends */
|
||
|
|
#define SHT_SHLIB 10 /* reserved - purpose unknown */
|
||
|
|
#define SHT_DYNSYM 11 /* dynamic symbol table section */
|
||
|
|
#define SHT_NUM 12 /* number of section types */
|
||
|
|
#define SHT_LOPROC 0x70000000 /* reserved range for processor */
|
||
|
|
#define SHT_HIPROC 0x7fffffff /* specific section header types */
|
||
|
|
#define SHT_LOUSER 0x80000000 /* reserved range for application */
|
||
|
|
#define SHT_HIUSER 0xffffffff /* specific indexes */
|
||
|
|
|
||
|
|
/* Section Attribute Flags - sh_flags */
|
||
|
|
#define SHF_WRITE 0x1 /* Writable */
|
||
|
|
#define SHF_ALLOC 0x2 /* occupies memory */
|
||
|
|
#define SHF_EXECINSTR 0x4 /* executable */
|
||
|
|
#define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */
|
||
|
|
/* specific section attributes */
|
||
|
|
|
||
|
|
#define IS_PROG(s) (s.sh_type == SHT_PROGBITS)
|
||
|
|
#define IS_NOPROG(s) (s.sh_type == SHT_NOBITS)
|
||
|
|
#define IS_REL(s) (s.sh_type == SHT_REL)
|
||
|
|
#define IS_RELA(s) (s.sh_type == SHT_RELA)
|
||
|
|
#define IS_ALLOC(s) (s.sh_flags == SHF_ALLOC)
|
||
|
|
#define IS_AX(s) ((s.sh_flags & SHF_ALLOC) && (s.sh_flags & SHF_EXECINSTR))
|
||
|
|
#define IS_AW(s) ((s.sh_flags & SHF_ALLOC) && (s.sh_flags & SHF_WRITE))
|
||
|
|
|
||
|
|
#if (defined(__arm__) || defined(__i386__) || (__riscv_xlen == 32))
|
||
|
|
#define elf_module ((Elf32_Ehdr *)module_ptr)
|
||
|
|
#define shdr ((Elf32_Shdr *)((rt_uint8_t *)module_ptr + elf_module->e_shoff))
|
||
|
|
#define phdr ((Elf32_Phdr *)((rt_uint8_t *)module_ptr + elf_module->e_phoff))
|
||
|
|
|
||
|
|
typedef Elf32_Sym Elf_Sym;
|
||
|
|
typedef Elf32_Rel Elf_Rel;
|
||
|
|
typedef Elf32_Addr Elf_Addr;
|
||
|
|
#elif (defined(__aarch64__) || defined(__x86_64__) || (__riscv_xlen == 64))
|
||
|
|
#define elf_module ((Elf64_Ehdr *)module_ptr)
|
||
|
|
#define shdr ((Elf64_Shdr *)((rt_uint8_t *)module_ptr + elf_module->e_shoff))
|
||
|
|
#define phdr ((Elf64_Phdr *)((rt_uint8_t *)module_ptr + elf_module->e_phoff))
|
||
|
|
|
||
|
|
typedef Elf64_Sym Elf_Sym;
|
||
|
|
typedef Elf64_Rela Elf_Rel;
|
||
|
|
typedef Elf64_Addr Elf_Addr;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int dlmodule_relocate(struct rt_dlmodule *module, Elf_Rel *rel, Elf_Addr sym_val);
|
||
|
|
rt_err_t dlmodule_load_shared_object(struct rt_dlmodule *module, void *module_ptr);
|
||
|
|
rt_err_t dlmodule_load_relocated_object(struct rt_dlmodule *module, void *module_ptr);
|
||
|
|
|
||
|
|
#endif
|