/* * @Copyright : (C) 2022 Phytium Information Technology, Inc. * All Rights Reserved. * * This program is OPEN SOURCE software: you can redistribute it and/or modify it * under the terms of the Phytium Public License as published by the Phytium Technology Co.,Ltd, * either version 1.0 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the Phytium Public License for more details. * * * @FilePath: felf.c * @Date: 2023-05-25 19:27:49 * @LastEditTime: 2023-06-05 14:11:48 * Description:  This file is for providing elf functions. * * Modify History: * Ver   Who        Date         Changes * ----- ------     --------    -------------------------------------- * 1.0 zhugengyu 2022/10/27 rename file name * 1.1 huanghe 2023/06/05 add get section information */ #include #include "fkernel.h" #include "felf.h" #include "fcache.h" #include "fdebug.h" #include "fprintk.h" /* This version doesn't work for 64-bit ABIs - Erik */ /* These typedefs need to be handled better */ typedef u32 Elf32_Addr; /* Unsigned program address */ typedef u32 Elf32_Off; /* Unsigned file offset */ typedef s32 Elf32_Sword; /* Signed large integer */ typedef u32 Elf32_Word; /* Unsigned large integer */ typedef u16 Elf32_Half; /* Unsigned medium integer */ /* 64-bit ELF base types */ typedef u64 Elf64_Addr; typedef u16 Elf64_Half; typedef s16 Elf64_SHalf; typedef u64 Elf64_Off; typedef s32 Elf64_Sword; typedef u32 Elf64_Word; typedef u64 Elf64_Xword; typedef s64 Elf64_Sxword; /* e_ident[] identification indexes */ #define EI_MAG0 0 /* file ID */ #define EI_MAG1 1 /* file ID */ #define EI_MAG2 2 /* file ID */ #define EI_MAG3 3 /* file ID */ #define EI_CLASS 4 /* file class */ #define EI_DATA 5 /* data encoding */ #define EI_VERSION 6 /* ELF header version */ #define EI_OSABI 7 /* OS/ABI specific ELF extensions */ #define EI_ABIVERSION 8 /* ABI target version */ #define EI_PAD 9 /* start of pad bytes */ #define EI_NIDENT 16 /* Size of e_ident[] */ /* ELF Header */ typedef struct { 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 { 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; /* name - index into section header string table section */ Elf64_Word sh_type; /* type */ Elf64_Xword sh_flags; /* flags */ Elf64_Addr sh_addr; /* address */ Elf64_Off sh_offset; /* file offset */ Elf64_Xword sh_size; /* section size */ Elf64_Word sh_link; /* section header table index link */ Elf64_Word sh_info; /* extra information */ Elf64_Xword sh_addralign; /* address alignment */ Elf64_Xword sh_entsize; /* section entry size */ } Elf64_Shdr; /* Symbol Table Entry */ typedef struct { 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; /* 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; /* 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; /* Location at which to apply the action */ Elf64_Xword r_info; /* index and type of relocation */ } Elf64_Rel; typedef struct { Elf64_Addr r_offset; /* Location at which to apply the action */ Elf64_Xword r_info; /* index and type of relocation */ Elf64_Sxword r_addend; /* Constant addend used to compute value */ } Elf64_Rela; /* 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 of segment */ 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; /* flags */ Elf64_Off p_offset; /* segment offset */ Elf64_Addr p_vaddr; /* virtual address of segment */ Elf64_Addr p_paddr; /* physical address of segment */ Elf64_Xword p_filesz; /* number of bytes in file for seg */ Elf64_Xword p_memsz; /* number of bytes in mem. for seg */ Elf64_Xword p_align; /* memory alignment */ } Elf64_Phdr; /* Dynamic structure */ typedef struct { Elf32_Sword d_tag; /* controls meaning of d_val */ union { Elf32_Word d_val; /* Multiple meanings - see d_tag */ Elf32_Addr d_ptr; /* program virtual address */ } d_un; } Elf32_Dyn; extern Elf32_Dyn _DYNAMIC[]; typedef struct { Elf64_Sxword d_tag; /* entry tag value */ union { Elf64_Xword d_val; Elf64_Addr d_ptr; } d_un; } Elf64_Dyn; /* 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 ELFMAG "\177ELF" /* magic */ #define SELFMAG 4 /* size of magic */ /* 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[] OS/ABI specific ELF extensions */ #define ELFOSABI_NONE 0 /* No extension specified */ #define ELFOSABI_HPUX 1 /* Hewlett-Packard HP-UX */ #define ELFOSABI_NETBSD 2 /* NetBSD */ #define ELFOSABI_LINUX 3 /* Linux */ #define ELFOSABI_SOLARIS 6 /* Sun Solaris */ #define ELFOSABI_AIX 7 /* AIX */ #define ELFOSABI_IRIX 8 /* IRIX */ #define ELFOSABI_FREEBSD 9 /* FreeBSD */ #define ELFOSABI_TRU64 10 /* Compaq TRU64 UNIX */ #define ELFOSABI_MODESTO 11 /* Novell Modesto */ #define ELFOSABI_OPENBSD 12 /* OpenBSD */ /* 64-255 Architecture-specific value range */ /* e_ident[] ABI Version */ #define ELFABIVERSION 0 /* 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) /* e_type */ #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 */ #define ET_NUM 5 /* number of types */ #define ET_LOOS 0xfe00 /* reserved range for operating */ #define ET_HIOS 0xfeff /* system specific e_type */ #define ET_LOPROC 0xff00 /* reserved range for processor */ #define ET_HIPROC 0xffff /* specific e_type */ /* e_machine */ #define EM_NONE 0 /* No Machine */ #define EM_M32 1 /* AT&T WE 32100 */ #define EM_SPARC 2 /* SPARC */ #define EM_386 3 /* Intel 80386 */ #define EM_68K 4 /* Motorola 68000 */ #define EM_88K 5 /* Motorola 88000 */ #if 0 #define EM_486 6 /* RESERVED - was Intel 80486 */ #endif #define EM_860 7 /* Intel 80860 */ #define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ #define EM_S370 9 /* IBM System/370 Processor */ #define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ #if 0 #define EM_SPARC64 11 /* RESERVED - was SPARC v9 \ 64-bit unoffical */ #endif /* RESERVED 11-14 for future use */ #define EM_PARISC 15 /* HPPA */ /* RESERVED 16 for future use */ #define EM_VPP500 17 /* Fujitsu VPP500 */ #define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ #define EM_960 19 /* Intel 80960 */ #define EM_PPC 20 /* PowerPC */ #define EM_PPC64 21 /* 64-bit PowerPC */ #define EM_S390 22 /* IBM System/390 Processor */ /* RESERVED 23-35 for future use */ #define EM_V800 36 /* NEC V800 */ #define EM_FR20 37 /* Fujitsu FR20 */ #define EM_RH32 38 /* TRW RH-32 */ #define EM_RCE 39 /* Motorola RCE */ #define EM_ARM 40 /* Advanced Risc Machines ARM */ #define EM_ALPHA 41 /* Digital Alpha */ #define EM_SH 42 /* Hitachi SH */ #define EM_SPARCV9 43 /* SPARC Version 9 */ #define EM_TRICORE 44 /* Siemens TriCore embedded processor */ #define EM_ARC 45 /* Argonaut RISC Core */ #define EM_H8_300 46 /* Hitachi H8/300 */ #define EM_H8_300H 47 /* Hitachi H8/300H */ #define EM_H8S 48 /* Hitachi H8S */ #define EM_H8_500 49 /* Hitachi H8/500 */ #define EM_IA_64 50 /* Intel Merced */ #define EM_MIPS_X 51 /* Stanford MIPS-X */ #define EM_COLDFIRE 52 /* Motorola Coldfire */ #define EM_68HC12 53 /* Motorola M68HC12 */ #define EM_MMA 54 /* Fujitsu MMA Multimedia Accelerator*/ #define EM_PCP 55 /* Siemens PCP */ #define EM_NCPU 56 /* Sony nCPU embeeded RISC */ #define EM_NDR1 57 /* Denso NDR1 microprocessor */ #define EM_STARCORE 58 /* Motorola Start*Core processor */ #define EM_ME16 59 /* Toyota ME16 processor */ #define EM_ST100 60 /* STMicroelectronic ST100 processor */ #define EM_TINYJ 61 /* Advanced Logic Corp. Tinyj emb.fam*/ #define EM_X86_64 62 /* AMD x86-64 */ #define EM_PDSP 63 /* Sony DSP Processor */ /* RESERVED 64,65 for future use */ #define EM_FX66 66 /* Siemens FX66 microcontroller */ #define EM_ST9PLUS 67 /* STMicroelectronics ST9+ 8/16 mc */ #define EM_ST7 68 /* STmicroelectronics ST7 8 bit mc */ #define EM_68HC16 69 /* Motorola MC68HC16 microcontroller */ #define EM_68HC11 70 /* Motorola MC68HC11 microcontroller */ #define EM_68HC08 71 /* Motorola MC68HC08 microcontroller */ #define EM_68HC05 72 /* Motorola MC68HC05 microcontroller */ #define EM_SVX 73 /* Silicon Graphics SVx */ #define EM_ST19 74 /* STMicroelectronics ST19 8 bit mc */ #define EM_VAX 75 /* Digital VAX */ #define EM_CHRIS 76 /* Axis Communications embedded proc. */ #define EM_JAVELIN 77 /* Infineon Technologies emb. proc. */ #define EM_FIREPATH 78 /* Element 14 64-bit DSP Processor */ #define EM_ZSP 79 /* LSI Logic 16-bit DSP Processor */ #define EM_MMIX 80 /* Donald Knuth's edu 64-bit proc. */ #define EM_HUANY 81 /* Harvard University mach-indep objs */ #define EM_PRISM 82 /* SiTera Prism */ #define EM_AVR 83 /* Atmel AVR 8-bit microcontroller */ #define EM_FR30 84 /* Fujitsu FR30 */ #define EM_D10V 85 /* Mitsubishi DV10V */ #define EM_D30V 86 /* Mitsubishi DV30V */ #define EM_V850 87 /* NEC v850 */ #define EM_M32R 88 /* Mitsubishi M32R */ #define EM_MN10300 89 /* Matsushita MN10200 */ #define EM_MN10200 90 /* Matsushita MN10200 */ #define EM_PJ 91 /* picoJava */ #define EM_NUM 92 /* number of machine types */ /* Version */ #define EV_NONE 0 /* Invalid */ #define EV_CURRENT 1 /* Current */ #define EV_NUM 2 /* number of versions */ /* Special Section Indexes */ #define SHN_UNDEF 0 /* undefined */ #define SHN_LORESERVE 0xff00 /* lower bounds of reserved indexes */ #define SHN_LOPROC 0xff00 /* reserved range for processor */ #define SHN_HIPROC 0xff1f /* specific section indexes */ #define SHN_LOOS 0xff20 /* reserved range for operating */ #define SHN_HIOS 0xff3f /* specific semantics */ #define SHN_ABS 0xfff1 /* absolute value */ #define SHN_COMMON 0xfff2 /* common symbol */ #define SHN_XINDEX 0xffff /* Index is an extra table */ #define SHN_HIRESERVE 0xffff /* upper bounds of reserved indexes */ /* 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 /* relation section without addends */ #define SHT_SHLIB 10 /* reserved - purpose unknown */ #define SHT_DYNSYM 11 /* dynamic symbol table section */ #define SHT_INIT_ARRAY 14 /* Array of constructors */ #define SHT_FINI_ARRAY 15 /* Array of destructors */ #define SHT_PREINIT_ARRAY 16 /* Array of pre-constructors */ #define SHT_GROUP 17 /* Section group */ #define SHT_SYMTAB_SHNDX 18 /* Extended section indeces */ #define SHT_NUM 19 /* number of section types */ #define SHT_LOOS 0x60000000 /* Start OS-specific */ #define SHT_HIOS 0x6fffffff /* End OS-specific */ #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 names */ #define ELF_BSS ".bss" /* uninitialized data */ #define ELF_COMMENT ".comment" /* version control information */ #define ELF_DATA ".data" /* initialized data */ #define ELF_DATA1 ".data1" /* 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_FINI_ARRAY ".fini_array" /* Array of destructors */ #define ELF_GOT ".got" /* global offset table */ #define ELF_HASH ".hash" /* symbol hash table */ #define ELF_INIT ".init" /* initialization code */ #define ELF_INIT_ARRAY ".init_array" /* Array of constuctors */ #define ELF_INTERP ".interp" /* Pathname of program interpreter */ #define ELF_LINE ".line" /* Symbolic line numnber information */ #define ELF_NOTE ".note" /* Contains note section */ #define ELF_PLT ".plt" /* Procedure linkage table */ #define ELF_PREINIT_ARRAY ".preinit_array" /* Array of pre-constructors */ #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_RODATA1 ".rodata1" /* 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_SYMTAB_SHNDX ".symtab_shndx" /* symbol table section index */ #define ELF_TBSS ".tbss" /* thread local uninit data */ #define ELF_TDATA ".tdata" /* thread local init data */ #define ELF_TDATA1 ".tdata1" /* thread local init data */ #define ELF_TEXT ".text" /* code */ /* Section Attribute Flags - sh_flags */ #define SHF_WRITE 0x1 /* Writable */ #define SHF_ALLOC 0x2 /* occupies memory */ #define SHF_EXECINSTR 0x4 /* executable */ #define SHF_MERGE 0x10 /* Might be merged */ #define SHF_STRINGS 0x20 /* Contains NULL terminated strings */ #define SHF_INFO_LINK 0x40 /* sh_info contains SHT index */ #define SHF_LINK_ORDER 0x80 /* Preserve order after combining*/ #define SHF_OS_NONCONFORMING 0x100 /* Non-standard OS specific handling */ #define SHF_GROUP 0x200 /* Member of section group */ #define SHF_TLS 0x400 /* Thread local storage */ #define SHF_MASKOS 0x0ff00000 /* OS specific */ #define SHF_MASKPROC 0xf0000000 /* reserved bits for processor */ /* specific section attributes */ /* Section Group Flags */ #define GRP_COMDAT 0x1 /* COMDAT group */ #define GRP_MASKOS 0x0ff00000 /* Mask OS specific flags */ #define GRP_MASKPROC 0xf0000000 /* Mask processor specific flags */ /* Symbol table index */ #define STN_UNDEF 0 /* undefined */ /* Extract symbol info - st_info */ #define ELF32_ST_BIND(x) ((x) >> 4) #define ELF32_ST_TYPE(x) (((unsigned int)x) & 0xf) #define ELF32_ST_INFO(b, t) (((b) << 4) + ((t)&0xf)) #define ELF32_ST_VISIBILITY(x) ((x)&0x3) /* Symbol Binding - ELF32_ST_BIND - st_info */ #define STB_LOCAL 0 /* Local symbol */ #define STB_GLOBAL 1 /* Global symbol */ #define STB_WEAK 2 /* like global - lower precedence */ #define STB_NUM 3 /* number of symbol bindings */ #define STB_LOOS 10 /* reserved range for operating */ #define STB_HIOS 12 /* system specific symbol bindings */ #define STB_LOPROC 13 /* reserved range for processor */ #define STB_HIPROC 15 /* specific symbol bindings */ /* Symbol type - ELF32_ST_TYPE - st_info */ #define STT_NOTYPE 0 /* not specified */ #define STT_OBJECT 1 /* data object */ #define STT_FUNC 2 /* function */ #define STT_SECTION 3 /* section */ #define STT_FILE 4 /* file */ #define STT_NUM 5 /* number of symbol types */ #define STT_TLS 6 /* Thread local storage symbol */ #define STT_LOOS 10 /* reserved range for operating */ #define STT_HIOS 12 /* system specific symbol types */ #define STT_LOPROC 13 /* reserved range for processor */ #define STT_HIPROC 15 /* specific symbol types */ /* Symbol visibility - ELF32_ST_VISIBILITY - st_other */ #define STV_DEFAULT 0 /* Normal visibility rules */ #define STV_INTERNAL 1 /* Processor specific hidden class */ #define STV_HIDDEN 2 /* Symbol unavailable in other mods */ #define STV_PROTECTED 3 /* Not preemptible, not exported */ /* 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)) /* Segment types - p_type */ #define PT_NULL 0 /* unused */ #define PT_LOAD 1 /* loadable segment */ #define PT_DYNAMIC 2 /* dynamic linking section */ #define PT_INTERP 3 /* the RTLD */ #define PT_NOTE 4 /* auxiliary information */ #define PT_SHLIB 5 /* reserved - purpose undefined */ #define PT_PHDR 6 /* program header */ #define PT_TLS 7 /* Thread local storage template */ #define PT_NUM 8 /* Number of segment types */ #define PT_LOOS 0x60000000 /* reserved range for operating */ #define PT_HIOS 0x6fffffff /* system specific segment types */ #define PT_LOPROC 0x70000000 /* reserved range for processor */ #define PT_HIPROC 0x7fffffff /* specific segment types */ /* Segment flags - p_flags */ #define PF_X 0x1 /* Executable */ #define PF_W 0x2 /* Writable */ #define PF_R 0x4 /* Readable */ #define PF_MASKOS 0x0ff00000 /* OS specific segment flags */ #define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ /* specific segment flags */ #define ELF64_R_SYM(i) ((i) >> 32) #define ELF64_R_TYPE(i) ((i)&0xffffffff) /* Dynamic Array Tags - d_tag */ #define DT_NULL 0 /* marks end of _DYNAMIC array */ #define DT_NEEDED 1 /* string table offset of needed lib */ #define DT_PLTRELSZ 2 /* size of relocation entries in PLT */ #define DT_PLTGOT 3 /* address PLT/GOT */ #define DT_HASH 4 /* address of symbol hash table */ #define DT_STRTAB 5 /* address of string table */ #define DT_SYMTAB 6 /* address of symbol table */ #define DT_RELA 7 /* address of relocation table */ #define DT_RELASZ 8 /* size of relocation table */ #define DT_RELAENT 9 /* size of relocation entry */ #define DT_STRSZ 10 /* size of string table */ #define DT_SYMENT 11 /* size of symbol table entry */ #define DT_INIT 12 /* address of initialization func */ #define DT_FINI 13 /* address of termination function */ #define DT_SONAME 14 /* string table offset of shared obj */ #define DT_RPATH 15 /* string table offset of library \ search path */ #define DT_SYMBOLIC 16 /* start sym search in shared obj */ #define DT_REL 17 /* address of rel. tbl. w addends */ #define DT_RELSZ 18 /* size of DT_REL relocation table */ #define DT_RELENT 19 /* size of DT_REL relocation entry */ #define DT_PLTREL 20 /* PLT referenced relocation entry */ #define DT_DEBUG 21 /* bugger */ #define DT_TEXTREL 22 /* Allow rel. mod. to unwritable seg */ #define DT_JMPREL 23 /* add. of PLT's relocation entries */ #define DT_BIND_NOW 24 /* Process relocations of object */ #define DT_INIT_ARRAY 25 /* Array with addresses of init fct */ #define DT_FINI_ARRAY 26 /* Array with addresses of fini fct */ #define DT_INIT_ARRAYSZ 27 /* Size in bytes of DT_INIT_ARRAY */ #define DT_FINI_ARRAYSZ 28 /* Size in bytes of DT_FINI_ARRAY */ #define DT_RUNPATH 29 /* Library search path */ #define DT_FLAGS 30 /* Flags for the object being loaded */ #define DT_ENCODING 32 /* Start of encoded range */ #define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/ #define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */ #define DT_NUM 34 /* Number used */ #define DT_LOOS 0x60000000 /* reserved range for OS */ #define DT_HIOS 0x6fffffff /* specific dynamic array tags */ #define DT_LOPROC 0x70000000 /* reserved range for processor */ #define DT_HIPROC 0x7fffffff /* specific dynamic array tags */ /* Dynamic Tag Flags - d_un.d_val */ #define DF_ORIGIN 0x01 /* Object may use DF_ORIGIN */ #define DF_SYMBOLIC 0x02 /* Symbol resolutions starts here */ #define DF_TEXTREL 0x04 /* Object contains text relocations */ #define DF_BIND_NOW 0x08 /* No lazy binding for this object */ #define DF_STATIC_TLS 0x10 /* Static thread local storage */ /* Standard ELF hashing function */ unsigned long elf_hash(const unsigned char *name); #define ELF_TARG_VER 1 /* The ver for which this code is intended */ /* ELF register definitions */ #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 #define R_386_NUM 11 /* x86-64 relocation types */ #define R_X86_64_NONE 0 /* No reloc */ #define R_X86_64_64 1 /* Direct 64 bit */ #define R_X86_64_PC32 2 /* PC relative 32 bit signed */ #define R_X86_64_GOT32 3 /* 32 bit GOT entry */ #define R_X86_64_PLT32 4 /* 32 bit PLT address */ #define R_X86_64_COPY 5 /* Copy symbol at runtime */ #define R_X86_64_GLOB_DAT 6 /* Create GOT entry */ #define R_X86_64_JUMP_SLOT 7 /* Create PLT entry */ #define R_X86_64_RELATIVE 8 /* Adjust by program base */ /* 32 bit signed pc relative offset to GOT */ #define R_X86_64_GOTPCREL 9 #define R_X86_64_32 10 /* Direct 32 bit zero extended */ #define R_X86_64_32S 11 /* Direct 32 bit sign extended */ #define R_X86_64_16 12 /* Direct 16 bit zero extended */ #define R_X86_64_PC16 13 /* 16 bit sign extended pc relative */ #define R_X86_64_8 14 /* Direct 8 bit sign extended */ #define R_X86_64_PC8 15 /* 8 bit sign extended pc relative */ #define R_X86_64_NUM 16 /* * XXX - PowerPC defines really don't belong in here, * but we'll put them in for simplicity. */ /* Values for Elf32/64_Ehdr.e_flags */ #define EF_PPC_EMB 0x80000000 /* PowerPC embedded flag */ #define EF_PPC64_ELFV1_ABI 0x00000001 #define EF_PPC64_ELFV2_ABI 0x00000002 /* Cygnus local bits below */ #define EF_PPC_RELOCATABLE 0x00010000 /* PowerPC -mrelocatable flag*/ #define EF_PPC_RELOCATABLE_LIB 0x00008000 /* PowerPC -mrelocatable-lib \ flag */ /* PowerPC relocations defined by the ABIs */ #define R_PPC_NONE 0 #define R_PPC_ADDR32 1 /* 32bit absolute address */ #define R_PPC_ADDR24 2 /* 26bit address, 2 bits ignored */ #define R_PPC_ADDR16 3 /* 16bit absolute address */ #define R_PPC_ADDR16_LO 4 /* lower 16bit of absolute address */ #define R_PPC_ADDR16_HI 5 /* high 16bit of absolute address */ #define R_PPC_ADDR16_HA 6 /* adjusted high 16bit */ #define R_PPC_ADDR14 7 /* 16bit address, 2 bits ignored */ #define R_PPC_ADDR14_BRTAKEN 8 #define R_PPC_ADDR14_BRNTAKEN 9 #define R_PPC_REL24 10 /* PC relative 26 bit */ #define R_PPC_REL14 11 /* PC relative 16 bit */ #define R_PPC_REL14_BRTAKEN 12 #define R_PPC_REL14_BRNTAKEN 13 #define R_PPC_GOT16 14 #define R_PPC_GOT16_LO 15 #define R_PPC_GOT16_HI 16 #define R_PPC_GOT16_HA 17 #define R_PPC_PLTREL24 18 #define R_PPC_COPY 19 #define R_PPC_GLOB_DAT 20 #define R_PPC_JMP_SLOT 21 #define R_PPC_RELATIVE 22 #define R_PPC_LOCAL24PC 23 #define R_PPC_UADDR32 24 #define R_PPC_UADDR16 25 #define R_PPC_REL32 26 #define R_PPC_PLT32 27 #define R_PPC_PLTREL32 28 #define R_PPC_PLT16_LO 29 #define R_PPC_PLT16_HI 30 #define R_PPC_PLT16_HA 31 #define R_PPC_SDAREL16 32 #define R_PPC_SECTOFF 33 #define R_PPC_SECTOFF_LO 34 #define R_PPC_SECTOFF_HI 35 #define R_PPC_SECTOFF_HA 36 /* Keep this the last entry */ #define R_PPC_NUM 37 /* * The remaining relocs are from the Embedded ELF ABI, and are not * in the SVR4 ELF ABI. */ #define R_PPC_EMB_NADDR32 101 #define R_PPC_EMB_NADDR16 102 #define R_PPC_EMB_NADDR16_LO 103 #define R_PPC_EMB_NADDR16_HI 104 #define R_PPC_EMB_NADDR16_HA 105 #define R_PPC_EMB_SDAI16 106 #define R_PPC_EMB_SDA2I16 107 #define R_PPC_EMB_SDA2REL 108 #define R_PPC_EMB_SDA21 109 /* 16 bit offset in SDA */ #define R_PPC_EMB_MRKREF 110 #define R_PPC_EMB_RELSEC16 111 #define R_PPC_EMB_RELST_LO 112 #define R_PPC_EMB_RELST_HI 113 #define R_PPC_EMB_RELST_HA 114 #define R_PPC_EMB_BIT_FLD 115 #define R_PPC_EMB_RELSDA 116 /* 16 bit relative offset in SDA */ /* Diab tool relocations */ #define R_PPC_DIAB_SDA21_LO 180 /* like EMB_SDA21, but lower 16 bit */ #define R_PPC_DIAB_SDA21_HI 181 /* like EMB_SDA21, but high 16 bit */ #define R_PPC_DIAB_SDA21_HA 182 /* like EMB_SDA21, adjusted high 16 */ #define R_PPC_DIAB_RELSDA_LO 183 /* like EMB_RELSDA, but lower 16 bit */ #define R_PPC_DIAB_RELSDA_HI 184 /* like EMB_RELSDA, but high 16 bit */ #define R_PPC_DIAB_RELSDA_HA 185 /* like EMB_RELSDA, adjusted high 16 */ /* * This is a phony reloc to handle any old fashioned TOC16 references * that may still be in object files. */ #define R_PPC_TOC16 255 /* ARM relocs */ #define R_ARM_NONE 0 /* No reloc */ #define R_ARM_RELATIVE 23 /* Adjust by program base */ /* AArch64 relocs */ #define R_AARCH64_NONE 0 /* No relocation */ #define R_AARCH64_RELATIVE 1027 /* Adjust by program base */ /* RISC-V relocations */ #define R_RISCV_32 1 #define R_RISCV_64 2 #define R_RISCV_RELATIVE 3 /* * A very simple ELF64 loader, assumes the image is valid, returns the * entry point address. * * Note if U-Boot is 32-bit, the loader assumes the to segment's * physical address and size is within the lower 32-bit address space. */ static unsigned long ElfLoadElf64ImagePhdr(unsigned long addr) { Elf64_Ehdr *ehdr; /* Elf header structure pointer */ Elf64_Phdr *phdr; /* Program header structure pointer */ int i; ehdr = (Elf64_Ehdr *)addr; phdr = (Elf64_Phdr *)(addr + (unsigned long)ehdr->e_phoff); /* Load each program header */ for (i = 0; i < ehdr->e_phnum; ++i) { void *dst = (void *)(unsigned long)phdr->p_paddr; void *src = (void *)addr + phdr->p_offset; f_printk("Loading phdr %i to %p (%lu bytes) \r\n", i, dst, (unsigned long)phdr->p_filesz); if (phdr->p_filesz) { memcpy(dst, src, phdr->p_filesz); } if (phdr->p_filesz != phdr->p_memsz) { memset(dst + phdr->p_filesz, 0x00, phdr->p_memsz - phdr->p_filesz); } FCacheDCacheFlushRange((uintptr)dst, phdr->p_memsz); ++phdr; } if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags & EF_PPC64_ELFV1_ABI)) { /* * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function * descriptor pointer with the first double word being the * address of the entry point of the function. */ uintptr_t addr = ehdr->e_entry; return *(Elf64_Addr *)addr; } return ehdr->e_entry; } static unsigned long ElfLoadElf64ImageShdr(unsigned long addr) { Elf64_Ehdr *ehdr; /* Elf header structure pointer */ Elf64_Shdr *shdr; /* Section header structure pointer */ unsigned char *strtab = 0; /* String table pointer */ unsigned char *image; /* Binary image pointer */ int i; /* Loop counter */ ehdr = (Elf64_Ehdr *)addr; /* Find the section header string table for output info */ shdr = (Elf64_Shdr *)(addr + (unsigned long)ehdr->e_shoff + (ehdr->e_shstrndx * sizeof(Elf64_Shdr))); if (shdr->sh_type == SHT_STRTAB) { strtab = (unsigned char *)(addr + (unsigned long)shdr->sh_offset); } /* Load each appropriate section */ for (i = 0; i < ehdr->e_shnum; ++i) { shdr = (Elf64_Shdr *)(addr + (unsigned long)ehdr->e_shoff + (i * sizeof(Elf64_Shdr))); if (!(shdr->sh_flags & SHF_ALLOC) || shdr->sh_addr == 0 || shdr->sh_size == 0) { continue; } if (strtab) { f_printk("%sing %s @ 0x%08lx (%ld bytes) \r\n", (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load", &strtab[shdr->sh_name], (unsigned long)shdr->sh_addr, (long)shdr->sh_size); } if (shdr->sh_type == SHT_NOBITS) { memset((void *)(uintptr)shdr->sh_addr, 0, shdr->sh_size); } else { image = (unsigned char *)addr + (unsigned long)shdr->sh_offset; memcpy((void *)(uintptr)shdr->sh_addr, (const void *)image, shdr->sh_size); } FCacheDCacheFlushRange((uintptr)shdr->sh_addr, shdr->sh_size); } if (ehdr->e_machine == EM_PPC64 && (ehdr->e_flags & EF_PPC64_ELFV1_ABI)) { /* * For the 64-bit PowerPC ELF V1 ABI, e_entry is a function * descriptor pointer with the first double word being the * address of the entry point of the function. */ uintptr addr = ehdr->e_entry; return *(Elf64_Addr *)addr; } return ehdr->e_entry; } unsigned long ElfLoadElfImagePhdr(unsigned long addr) { Elf32_Ehdr *ehdr; /* Elf header structure pointer */ Elf32_Phdr *phdr; /* Program header structure pointer */ int i; ehdr = (Elf32_Ehdr *)addr; if (ehdr->e_ident[EI_CLASS] == ELFCLASS64) { return ElfLoadElf64ImagePhdr(addr); } phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff); /* Load each program header */ for (i = 0; i < ehdr->e_phnum; ++i) { void *dst = (void *)(uintptr)phdr->p_paddr; void *src = (void *)addr + phdr->p_offset; f_printk("Loading phdr %i to %p (%i bytes)", i, dst, phdr->p_filesz); if (phdr->p_filesz) { memcpy(dst, src, phdr->p_filesz); } if (phdr->p_filesz != phdr->p_memsz) { memset(dst + phdr->p_filesz, 0x00, phdr->p_memsz - phdr->p_filesz); } FCacheDCacheFlushRange((uintptr)dst, phdr->p_memsz); ++phdr; } return ehdr->e_entry; } unsigned long ElfLoadElfImageShdr(unsigned long addr) { Elf32_Ehdr *ehdr; /* Elf header structure pointer */ Elf32_Shdr *shdr; /* Section header structure pointer */ unsigned char *strtab = 0; /* String table pointer */ unsigned char *image; /* Binary image pointer */ int i; /* Loop counter */ ehdr = (Elf32_Ehdr *)addr; if (ehdr->e_ident[EI_CLASS] == ELFCLASS64) { return ElfLoadElf64ImageShdr(addr); } /* Find the section header string table for output info */ shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff + (ehdr->e_shstrndx * sizeof(Elf32_Shdr))); if (shdr->sh_type == SHT_STRTAB) { strtab = (unsigned char *)(addr + shdr->sh_offset); } /* Load each appropriate section */ for (i = 0; i < ehdr->e_shnum; ++i) { shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff + (i * sizeof(Elf32_Shdr))); if (!(shdr->sh_flags & SHF_ALLOC) || shdr->sh_addr == 0 || shdr->sh_size == 0) { continue; } if (strtab) { f_printk("%sing %s @ 0x%08lx (%ld bytes)", (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load", &strtab[shdr->sh_name], (unsigned long)shdr->sh_addr, (long)shdr->sh_size); } if (shdr->sh_type == SHT_NOBITS) { memset((void *)(uintptr)shdr->sh_addr, 0, shdr->sh_size); } else { image = (unsigned char *)addr + shdr->sh_offset; memcpy((void *)(uintptr)shdr->sh_addr, (const void *)image, shdr->sh_size); } FCacheDCacheFlushRange((uintptr)shdr->sh_addr, shdr->sh_size); } return ehdr->e_entry; } /* * Determine if a valid ELF image exists at the given memory location. * First look at the ELF header magic field, then make sure that it is * executable. */ int ElfIsImageValid(unsigned long addr) { Elf32_Ehdr *ehdr; /* Elf header structure pointer */ ehdr = (Elf32_Ehdr *)addr; if (!IS_ELF(*ehdr)) { return 0; } if (ehdr->e_type != ET_EXEC) { return 0; } return 1; } /* Allow ports to override the default behavior */ unsigned long ElfExecBootElf(unsigned long (*entry)(int, char *const[]), int argc, char *const argv[]) { unsigned long ret; /* * pass address parameter as argv[0] (aka command name), * and all remaining args */ ret = entry(argc, argv); return ret; } /** * @name: Elf64GetTargetSection * @msg: 从ELF文件中获取指定名称的section的数据 * @return: FError，表示函数执行结果的错误码 * @note: * @param {Elf64_Ehdr} *ehdr，指向ELF文件头的指针 * @param {char} *section_name，指定的section名称 * @param {u8} *data_get，用于存储获取到的section数据的缓冲区指针 * @param {u32} *length_p，用于存储获取到的section数据长度的指针 */ static FError Elf64GetTargetSection(unsigned long addr,char *section_name ,u8 *data_get,u32 *length_p) { Elf64_Ehdr *ehdr; /* Elf header structure pointer */ Elf64_Shdr *shdr; /* Section header structure pointer */ unsigned char *strtab = 0; /* String table pointer */ unsigned char *image; /* Binary image pointer */ int i; /* Loop counter */ ehdr = (Elf64_Ehdr *)addr; /* Find the section header string table for output info */ shdr = (Elf64_Shdr *)(addr + (unsigned long)ehdr->e_shoff + (ehdr->e_shstrndx * sizeof(Elf64_Shdr))); if (shdr->sh_type == SHT_STRTAB) { strtab = (unsigned char *)(addr + (unsigned long)shdr->sh_offset); } else { f_printk("There is no string table \r\n"); return FELF_SECTION_NO_STRTAB; } /* Load each appropriate section */ for (i = 0; i < ehdr->e_shnum; ++i) { shdr = (Elf64_Shdr *)(addr + (unsigned long)ehdr->e_shoff + (i * sizeof(Elf64_Shdr))); if (!(shdr->sh_flags & SHF_ALLOC) || shdr->sh_addr == 0 || shdr->sh_size == 0) { continue; } if(strcmp(section_name, &strtab[shdr->sh_name]) == 0) { f_printk("%sing %s @ 0x%08lx (%ld bytes) \r\n", (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load", &strtab[shdr->sh_name], (unsigned long)shdr->sh_addr, (long)shdr->sh_size); if(shdr->sh_type == SHT_NOBITS) { f_printk("There is no space section \r\n"); return FELF_SECTION_NO_SPACE; } printf("*length_p is %d \r\n",*length_p); if (shdr->sh_size < *length_p) { *length_p = shdr->sh_size; } image = (unsigned char *)addr + (unsigned long)shdr->sh_offset; memcpy((void *)(uintptr)data_get, (const void *)image, *length_p); return FELF_SUCCESS; } } f_printk("%s: No %s section exists in this elf file \r\n",__func__,section_name); return FELF_SECTION_NOT_FIT; } /** * @name: * @msg: * @return {*} * @note: * @param {Elf32_Shdr} *ehdr * @param {char} *section_name * @param {u8} *data_get * @param {u32} *length_p */ static FError Elf32GetTargetSection(unsigned long addr,char *section_name ,u8 *data_get,u32 *length_p) { Elf32_Ehdr *ehdr; /* Elf header structure pointer */ Elf32_Shdr *shdr; /* Section header structure pointer */ unsigned char *strtab = 0; /* String table pointer */ unsigned char *image; /* Binary image pointer */ int i; /* Loop counter */ ehdr = (Elf32_Ehdr *)addr; /* Find the section header string table for output info */ shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff + (ehdr->e_shstrndx * sizeof(Elf32_Shdr))); if (shdr->sh_type == SHT_STRTAB) { strtab = (unsigned char *)(addr + shdr->sh_offset); } else { f_printk("There is no string table \r\n"); return FELF_SECTION_NO_STRTAB; } /* Load each appropriate section */ for (i = 0; i < ehdr->e_shnum; ++i) { shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff + (i * sizeof(Elf32_Shdr))); if (!(shdr->sh_flags & SHF_ALLOC) || shdr->sh_addr == 0 || shdr->sh_size == 0) { continue; } if (strcmp(section_name, &strtab[shdr->sh_name]) == 0) { printf("%sing %s @ 0x%08lx (%ld bytes)", (shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load", &strtab[shdr->sh_name], (unsigned long)shdr->sh_addr, (long)shdr->sh_size); printf("copy num is \r\n"); printf("*length_p is %d \r\n",*length_p); if(shdr->sh_size < *length_p) { *length_p = shdr->sh_size; } image = (unsigned char *)addr + (unsigned long)shdr->sh_offset; memcpy((void *)(uintptr)data_get, (const void *)image, *length_p); return FELF_SUCCESS; } } f_printk("%s: No %s section exists in this elf file \r\n",__func__,section_name); return FELF_SECTION_NOT_FIT; } /** * @name: ElfGetSection * @msg: 获取 ELF 文件中指定节的内容 * @return {FError} 返回错误码，表示获取节内容的结果 * @note: 函数将根据 ELF 文件的类型（32位或64位）调用相应的函数来获取指定节的内容。 * @param {unsigned long} addr ELF 文件的基地址 * @param {char*} section_name 节的名称 * @param {u8*} data_get 用于存储节内容的缓冲区 * @param {u32*} length_p 存储获取到的节内容的长度 */ FError ElfGetSection(unsigned long addr, char *section_name, u8 *data_get, u32 *length_p) { Elf32_Ehdr *ehdr; /* ELF 文件头指针 */ Elf32_Shdr *shdr; /* 节头指针 */ unsigned char *strtab = 0; /* 字符串表指针 */ unsigned char *image; /* 二进制映像指针 */ int i; /* 循环计数器 */ /* 检查 ELF 文件的类型 */ ehdr = (Elf32_Ehdr *)addr; if (ehdr->e_ident[EI_CLASS] == ELFCLASS64) { /* 如果是64位 ELF，则调用 Elf64GetTargetSection 函数获取指定节的内容 */ return Elf64GetTargetSection(addr, section_name, data_get, length_p); } /* 如果是32位 ELF，则调用 Elf32GetTargetSection 函数获取指定节的内容 */ if (ehdr->e_ident[EI_CLASS] == ELFCLASS32) { return Elf32GetTargetSection(addr, section_name, data_get, length_p); } /* 若未匹配到有效的 ELF 类型，则返回 FELF_SECTION_GET_ERROR 错误码 */ return FELF_SECTION_GET_ERROR; }