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readelf源码学习
导入 /usr/include/elf.h
main.cpp
#include <iostream> #include <cstring> #include "elf.h" #include "stdio.h" #include "ELF_process.h" #define file_name "libhello-jni.so" #define SARMAG 8 int main() { FILE *file = fopen(file_name,"rb"); char armag[SARMAG]; printf("Input file ‘%s‘.\n", file_name); if (file == NULL) { printf("Input file ‘%s‘ is not readable.\n", file_name); return 0; } if (fread (armag, SARMAG, 1, file) != 1) { printf("%s: Failed to read file‘s magic number\n", file_name); fclose (file); return 0; } rewind(file); ELF_process *pro; pro->Process_object(file); fclose (file); delete(pro); return 0; }
ELF_process.h
#include <iostream> /* ELF Header (32-bit implementations) */ typedef struct { unsigned char e_ident[16]; /* ELF "magic number" */ unsigned char e_type[2]; /* Identifies object file type */ unsigned char e_machine[2]; /* Specifies required architecture */ unsigned char e_version[4]; /* Identifies object file version */ unsigned char e_entry[4]; /* Entry point virtual address */ unsigned char e_phoff[4]; /* Program header table file offset */ unsigned char e_shoff[4]; /* Section header table file offset */ unsigned char e_flags[4]; /* Processor-specific flags */ unsigned char e_ehsize[2]; /* ELF header size in bytes */ unsigned char e_phentsize[2]; /* Program header table entry size */ unsigned char e_phnum[2]; /* Program header table entry count */ unsigned char e_shentsize[2]; /* Section header table entry size */ unsigned char e_shnum[2]; /* Section header table entry count */ unsigned char e_shstrndx[2]; /* Section header string table index */ } Elf32_External_Ehdr; typedef struct { unsigned char e_ident[16]; /* ELF "magic number" */ unsigned char e_type[2]; /* Identifies object file type */ unsigned char e_machine[2]; /* Specifies required architecture */ unsigned char e_version[4]; /* Identifies object file version */ unsigned char e_entry[8]; /* Entry point virtual address */ unsigned char e_phoff[8]; /* Program header table file offset */ unsigned char e_shoff[8]; /* Section header table file offset */ unsigned char e_flags[4]; /* Processor-specific flags */ unsigned char e_ehsize[2]; /* ELF header size in bytes */ unsigned char e_phentsize[2]; /* Program header table entry size */ unsigned char e_phnum[2]; /* Program header table entry count */ unsigned char e_shentsize[2]; /* Section header table entry size */ unsigned char e_shnum[2]; /* Section header table entry count */ unsigned char e_shstrndx[2]; /* Section header string table index */ } Elf64_External_Ehdr; /* Section header */ typedef struct { unsigned char sh_name[4]; /* Section name, index in string tbl */ unsigned char sh_type[4]; /* Type of section */ unsigned char sh_flags[4]; /* Miscellaneous section attributes */ unsigned char sh_addr[4]; /* Section virtual addr at execution */ unsigned char sh_offset[4]; /* Section file offset */ unsigned char sh_size[4]; /* Size of section in bytes */ unsigned char sh_link[4]; /* Index of another section */ unsigned char sh_info[4]; /* Additional section information */ unsigned char sh_addralign[4]; /* Section alignment */ unsigned char sh_entsize[4]; /* Entry size if section holds table */ } Elf32_External_Shdr; typedef struct { unsigned char sh_name[4]; /* Section name, index in string tbl */ unsigned char sh_type[4]; /* Type of section */ unsigned char sh_flags[8]; /* Miscellaneous section attributes */ unsigned char sh_addr[8]; /* Section virtual addr at execution */ unsigned char sh_offset[8]; /* Section file offset */ unsigned char sh_size[8]; /* Size of section in bytes */ unsigned char sh_link[4]; /* Index of another section */ unsigned char sh_info[4]; /* Additional section information */ unsigned char sh_addralign[8]; /* Section alignment */ unsigned char sh_entsize[8]; /* Entry size if section holds table */ } Elf64_External_Shdr; /* Program header */ typedef struct { unsigned char p_type[4]; /* Identifies program segment type */ unsigned char p_offset[4]; /* Segment file offset */ unsigned char p_vaddr[4]; /* Segment virtual address */ unsigned char p_paddr[4]; /* Segment physical address */ unsigned char p_filesz[4]; /* Segment size in file */ unsigned char p_memsz[4]; /* Segment size in memory */ unsigned char p_flags[4]; /* Segment flags */ unsigned char p_align[4]; /* Segment alignment, file & memory */ } Elf32_External_Phdr; typedef struct { unsigned char p_type[4]; /* Identifies program segment type */ unsigned char p_flags[4]; /* Segment flags */ unsigned char p_offset[8]; /* Segment file offset */ unsigned char p_vaddr[8]; /* Segment virtual address */ unsigned char p_paddr[8]; /* Segment physical address */ unsigned char p_filesz[8]; /* Segment size in file */ unsigned char p_memsz[8]; /* Segment size in memory */ unsigned char p_align[8]; /* Segment alignment, file & memory */ } Elf64_External_Phdr; /* dynamic section structure */ typedef struct { unsigned char d_tag[4]; /* entry tag value */ union { unsigned char d_val[4]; unsigned char d_ptr[4]; } d_un; } Elf32_External_Dyn; typedef struct { unsigned char d_tag[8]; /* entry tag value */ union { unsigned char d_val[8]; unsigned char d_ptr[8]; } d_un; } Elf64_External_Dyn; /* Relocation Entries */ typedef struct { unsigned char r_offset[4]; /* Location at which to apply the action */ unsigned char r_info[4]; /* index and type of relocation */ } Elf32_External_Rel; typedef struct { unsigned char r_offset[4]; /* Location at which to apply the action */ unsigned char r_info[4]; /* index and type of relocation */ unsigned char r_addend[4]; /* Constant addend used to compute value */ } Elf32_External_Rela; typedef struct { unsigned char r_offset[8]; /* Location at which to apply the action */ unsigned char r_info[8]; /* index and type of relocation */ } Elf64_External_Rel; typedef struct { unsigned char r_offset[8]; /* Location at which to apply the action */ unsigned char r_info[8]; /* index and type of relocation */ unsigned char r_addend[8]; /* Constant addend used to compute value */ } Elf64_External_Rela; /* Symbol table entry */ typedef struct { unsigned char st_name[4]; /* Symbol name, index in string tbl */ unsigned char st_value[4]; /* Value of the symbol */ unsigned char st_size[4]; /* Associated symbol size */ unsigned char st_info[1]; /* Type and binding attributes */ unsigned char st_other[1]; /* No defined meaning, 0 */ unsigned char st_shndx[2]; /* Associated section index */ } Elf32_External_Sym; typedef struct { unsigned char st_name[4]; /* Symbol name, index in string tbl */ unsigned char st_info[1]; /* Type and binding attributes */ unsigned char st_other[1]; /* No defined meaning, 0 */ unsigned char st_shndx[2]; /* Associated section index */ unsigned char st_value[8]; /* Value of the symbol */ unsigned char st_size[8]; /* Associated symbol size */ } Elf64_External_Sym; class ELF_process { ELF_process(); void* get_data(void * var, FILE * file, long offset, size_t size, size_t nmemb, const char * reason); void *cmalloc (size_t nmemb, size_t size); int get_32bit_section_headers (FILE * file, unsigned int num); int get_file_header(FILE *file); int process_file_header(); const char* get_elf_class (unsigned int elf_class); const char * get_data_encoding (unsigned int encoding); const char * get_osabi_name (unsigned int osabi); const char *get_file_type (unsigned e_type); const char *get_machine_name (unsigned e_machine); int process_section_headers (FILE * file); const char *get_section_type_name (unsigned int sh_type); const char *get_mips_section_type_name (unsigned int sh_type); const char *get_parisc_section_type_name (unsigned int sh_type); const char *get_ia64_section_type_name (unsigned int sh_type); const char *get_x86_64_section_type_name (unsigned int sh_type); const char *get_aarch64_section_type_name (unsigned int sh_type); const char *get_arm_section_type_name (unsigned int sh_type); const char *get_tic6x_section_type_name (unsigned int sh_type); const char *get_msp430x_section_type_name (unsigned int sh_type); int process_program_headers (FILE * file); const char *get_segment_type (unsigned int p_type); const char *get_aarch64_segment_type (unsigned long type); const char *get_arm_segment_type (unsigned long type); const char *get_mips_segment_type (unsigned long type); const char *get_parisc_segment_type (unsigned long type); const char *get_ia64_segment_type (unsigned long type); const char *get_tic6x_segment_type (unsigned long type); int get_program_headers (FILE * file); int get_32bit_program_headers (FILE * file, Elf32_Phdr * pheaders); int get_64bit_program_headers (FILE * file, Elf64_Phdr * pheaders); int process_dynamic_section (FILE * file); int get_32bit_dynamic_section (FILE * file); int get_64bit_dynamic_section(FILE * file); void print_dynamic_flags (Elf32_Word flags); const char *get_dynamic_type (unsigned long type); int process_relocs (FILE * file); void get_32bit_rel(FILE *pFILE, unsigned int offset); public: int Process_object(FILE *file); void process_symbol_table(FILE *pFILE); void get_32bit_symbol(FILE *pFILE); void get_32bit_strdyn(FILE *pFILE, Elf32_Word name); };
ELF_process.cpp
#include <elf.h> #include <cstring> #include "ELF_process.h" #define file_name "/home/hx/cProgram/Process/libhello-jni.so" #define BYTE_GET(field) byte_get_little_endian (field,sizeof(field)) static int is_32bit_elf; Elf32_Ehdr elf_header; Elf32_Shdr* section_headers; Elf32_Phdr* program_headers; Elf32_Sym* sym_dyn; static unsigned int dynamic_addr; static unsigned int dynamic_offset; unsigned int dynamic_strings; unsigned int dynamic_size; static unsigned int rel_nent; static unsigned int rel_dyn_offset; static unsigned int rel_dyn_size; static unsigned int sym_dyn_offset; static unsigned int sym_dyn_size; static unsigned int str_dyn_offset; static unsigned int str_dyn_size; unsigned int sym_nent; Elf32_Dyn* dynamic_section; static unsigned int dynamic_nent; #define SHT_PARISC_ANNOT 0x70000003 #define SHT_PARISC_SYMEXTN SHT_LOPROC + 8 #define SHT_PARISC_STUBS SHT_LOPROC + 9 #define SHT_PARISC_DLKM 0x70000004 #define PT_PARISC_WEAKORDER 0x70000002 #define PT_HP_CORE_UTSNAME (PT_LOOS + 0x15) #define SHT_IA_64_PRIORITY_INIT (SHT_LOPROC + 0x9000000) #define SHT_IA_64_VMS_TRACE 0x60000000 #define SHT_IA_64_VMS_TIE_SIGNATURES 0x60000001 #define SHT_IA_64_VMS_DEBUG 0x60000002 #define SHT_IA_64_VMS_DEBUG_STR 0x60000003 #define SHT_IA_64_VMS_LINKAGES 0x60000004 #define SHT_IA_64_VMS_SYMBOL_VECTOR 0x60000005 #define SHT_IA_64_VMS_FIXUP 0x60000006 #define SHT_IA_64_LOPSREG (SHT_LOPROC + 0x8000000) #define EM_L1OM 180 /* Intel L1OM */ #define EM_K1OM 181 /* Intel K1OM */ #define EM_TI_C6000 140 /* Texas Instruments TMS320C6000 DSP family */ #define EM_MSP430 105 /* TI msp430 micro controller */ #define SHT_ARM_DEBUGOVERLAY 0x70000004 /* Section holds overlay debug info. */ #define SHT_ARM_OVERLAYSECTION 0x70000005 /* Section holds GDB and overlay integration info. */ #define SHT_X86_64_UNWIND 0x70000001 /* unwind information */ #define SHT_AARCH64_ATTRIBUTES 0x70000003 /* Section holds attributes. */ #define SHT_C6000_UNWIND 0x70000001 #define SHT_C6000_PREEMPTMAP 0x70000002 #define SHT_C6000_ATTRIBUTES 0x70000003 #define SHT_TI_ICODE 0x7F000000 #define SHT_TI_XREF 0x7F000001 #define SHT_TI_HANDLER 0x7F000002 #define SHT_TI_INITINFO 0x7F000003 #define SHT_TI_PHATTRS 0x7F000004 #define SHT_MSP430_ATTRIBUTES 0x70000003 /* Section holds ABI attributes. */ #define SHT_MSP430_SEC_FLAGS 0x7f000005 /* Holds TI compiler‘s section flags. */ #define SHT_MSP430_SYM_ALIASES 0x7f000006 /* Holds TI compiler‘s symbol aliases. */ #define PT_AARCH64_ARCHEXT (PT_LOPROC + 0) int byte_get_little_endian (unsigned char *field, int size){ switch (size){ case 1: return *field; case 2: return ((unsigned int)(field[0])) | (((unsigned int)(field[1])) << 8); case 3: return ((unsigned long) (field[0])) | (((unsigned long) (field[1])) << 8) | (((unsigned long) (field[2])) << 16); case 4: return ((unsigned long) (field[0])) | (((unsigned long) (field[1])) << 8) | (((unsigned long) (field[2])) << 16) | (((unsigned long) (field[3])) << 24); } } ELF_process::ELF_process() { } int ELF_process::Process_object(FILE *file) { if (!get_file_header(file)){ printf("gei file header Failed"); return 0; } /********* start process ***********/ if (!process_file_header()){ return 0; } if(!process_section_headers(file)){ return 0; } if(!process_program_headers(file)){ process_dynamic_section(file); } process_relocs(file); process_symbol_table(file); } int ELF_process::get_file_header(FILE *file) { /* Read in the identity array. */ if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1) return 0; /* For now we only support 32 bit and 64 bit ELF files. */ is_32bit_elf = (elf_header.e_ident[EI_CLASS] != ELFCLASS64); /* Read in the rest of the header. */ if (is_32bit_elf){ Elf32_External_Ehdr ehdr32; if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT, 1, file) != 1) return 0; elf_header.e_type = BYTE_GET (ehdr32.e_type); elf_header.e_machine = BYTE_GET (ehdr32.e_machine); elf_header.e_version = BYTE_GET (ehdr32.e_version); elf_header.e_entry = BYTE_GET (ehdr32.e_entry); elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff); elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff); elf_header.e_flags = BYTE_GET (ehdr32.e_flags); elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize); elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize); elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum); elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize); elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum); elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx); if (elf_header.e_shoff){ if (is_32bit_elf) get_32bit_section_headers(file,1); else { //64位 ... } } } return 1; } int ELF_process::get_32bit_section_headers(FILE *file, unsigned int num) { Elf32_External_Shdr * shdrs; Elf32_Shdr* internal; shdrs = (Elf32_External_Shdr *) get_data (NULL, file, elf_header.e_shoff, elf_header.e_shentsize, num, ("section headers")); if (!shdrs) return 0; section_headers = (Elf32_Shdr *) cmalloc (num,sizeof (Elf32_Shdr)); if (section_headers == NULL) { printf("Out of memory\n"); return 0; } internal = section_headers; for (int i = 0;i < num;i++, internal++) { internal->sh_name = BYTE_GET (shdrs[i].sh_name); internal->sh_type = BYTE_GET (shdrs[i].sh_type); internal->sh_flags = BYTE_GET (shdrs[i].sh_flags); internal->sh_addr = BYTE_GET (shdrs[i].sh_addr); internal->sh_offset = BYTE_GET (shdrs[i].sh_offset); internal->sh_size = BYTE_GET (shdrs[i].sh_size); internal->sh_link = BYTE_GET (shdrs[i].sh_link); internal->sh_info = BYTE_GET (shdrs[i].sh_info); internal->sh_addralign = BYTE_GET (shdrs[i].sh_addralign); internal->sh_entsize = BYTE_GET (shdrs[i].sh_entsize); } free (shdrs); return 1; } void * ELF_process::get_data (void * var, FILE * file, long offset, size_t size, size_t nmemb,const char * reason) { void * mvar; if (size == 0 || nmemb == 0) return NULL; if (fseek (file, offset, SEEK_SET)) { //error (_("Unable to seek to 0x%lx for %s\n"), // (unsigned long) archive_file_offset + offset, reason); return NULL; } mvar = var; if (mvar == NULL) { /* Check for overflow. */ if (nmemb < (~(size_t) 0 - 1) / size) /* + 1 so that we can ‘\0‘ terminate invalid string table sections. */ mvar = malloc (size * nmemb + 1); if (mvar == NULL) { //error (_("Out of memory allocating 0x%lx bytes for %s\n"), //(unsigned long)(size * nmemb), reason); return NULL; } ((char *) mvar)[size * nmemb] = ‘\0‘; } if (fread (mvar, size, nmemb, file) != nmemb) { //error (_("Unable to read in 0x%lx bytes of %s\n"), // (unsigned long)(size * nmemb), reason); if (mvar != var) free (mvar); return NULL; } return mvar; } void *ELF_process::cmalloc (size_t nmemb, size_t size) { /* Check for overflow. */ if (nmemb >= ~(size_t) 0 / size) return NULL; else return malloc (nmemb * size); } int ELF_process::process_file_header(void) { if ( elf_header.e_ident[EI_MAG0] != ELFMAG0 || elf_header.e_ident[EI_MAG1] != ELFMAG1 || elf_header.e_ident[EI_MAG2] != ELFMAG2 || elf_header.e_ident[EI_MAG3] != ELFMAG3) { printf("Not an ELF file - it has the wrong magic bytes at the start\n"); return 0; } printf("ELF Header:\n"); printf(" Magic: "); for (int i = 0; i <EI_NIDENT ; ++i) printf ("%2.2x ", elf_header.e_ident[i]); printf("\n"); printf(" Class: %s\n", get_elf_class(elf_header.e_ident[EI_CLASS])); printf (" Data: %s\n", get_data_encoding (elf_header.e_ident[EI_DATA])); printf (" Version: %d %s\n", elf_header.e_ident[EI_VERSION], (elf_header.e_ident[EI_VERSION] == EV_CURRENT ? "(current)" : (elf_header.e_ident[EI_VERSION] != EV_NONE ? ("<unknown: %lx>") : ""))); printf (" OS/ABI: %s\n", get_osabi_name (elf_header.e_ident[EI_OSABI])); printf (" ABI Version: %d\n", elf_header.e_ident[EI_ABIVERSION]); printf (" Type: %s\n", get_file_type (elf_header.e_type)); printf (" Machine: %s\n", get_machine_name (elf_header.e_machine)); printf (" Version: 0x%lx\n", (unsigned long) elf_header.e_version); printf (" Entry point address: 0x%x",elf_header.e_entry); printf ("\n Start of program headers: %d",elf_header.e_phoff); printf (" (bytes into file)\n Start of section headers: %d",elf_header.e_shoff); printf (" (bytes into file)\n"); printf (" Flags: 0x%lx\n",(unsigned long)elf_header.e_flags); printf (" Size of this header: %ld (bytes)\n",(long)elf_header.e_ehsize); printf (" Size of program headers: %ld (bytes)\n",(long)elf_header.e_phentsize); printf (" Number of program headers: %ld\n",(long)elf_header.e_phnum); if (section_headers != NULL && elf_header.e_phnum == PN_XNUM && section_headers[0].sh_info != 0) printf (" (%ld)", (long) section_headers[0].sh_info); printf (" Size of section headers: %ld (bytes)\n", (long) elf_header.e_shentsize); printf (" Number of section headers: %ld\n", (long) elf_header.e_shnum); if (section_headers != NULL && elf_header.e_shnum == SHN_UNDEF) printf (" (%ld)", (long) section_headers[0].sh_size); printf (" Section header string table index: %ld\n", (long) elf_header.e_shstrndx); if (section_headers != NULL && elf_header.e_shstrndx == (SHN_XINDEX & 0xffff)) printf (" (%u)", section_headers[0].sh_link); else if (elf_header.e_shstrndx != SHN_UNDEF && elf_header.e_shstrndx >= elf_header.e_shnum) printf (" <corrupt: out of range>"); return 1; } const char * ELF_process::get_elf_class (unsigned int elf_class) { static char buff[32]; switch (elf_class) { case ELFCLASSNONE: return ("none"); case ELFCLASS32: return "ELF32"; case ELFCLASS64: return "ELF64"; default: snprintf (buff, sizeof (buff), ("<unknown: %x>"), elf_class); return buff; } } const char * ELF_process::get_data_encoding (unsigned int encoding) { static char buff[32]; switch (encoding) { case ELFDATANONE: return ("none"); case ELFDATA2LSB: return ("2‘s complement, little endian"); case ELFDATA2MSB: return ("2‘s complement, big endian"); default: snprintf (buff, sizeof (buff), ("<unknown: %x>"), encoding); return buff; } } const char * ELF_process::get_osabi_name (unsigned int osabi){ static char buff[32]; switch (osabi){ case ELFOSABI_NONE: return "UNIX System V ABI"; case ELFOSABI_HPUX: return "HP-UX"; case ELFOSABI_NETBSD: return "NetBSD"; case ELFOSABI_GNU: return "Object uses GNU ELF extensions"; case ELFOSABI_SOLARIS: return "Sun Solaris"; case ELFOSABI_AIX: return "IBM AIX"; case ELFOSABI_IRIX: return "SGI Irix"; case ELFOSABI_FREEBSD: return "FreeBSD"; case ELFOSABI_TRU64: return "Compaq TRU64 UNIX"; case ELFOSABI_MODESTO: return "Novell Modesto"; case ELFOSABI_OPENBSD: return "OpenBSD"; case ELFOSABI_ARM_AEABI: return "ARM EABI"; case ELFOSABI_ARM: return "ARM"; case ELFOSABI_STANDALONE: return "Standalone (embedded) application"; default: break; } snprintf (buff, sizeof (buff), ("<unknown: %x>"), osabi); return buff; } const char *ELF_process::get_file_type(unsigned e_type) { static char buff[32]; switch (e_type) { case ET_NONE: return "NONE (None)"; case ET_REL: return "REL (Relocatable file)"; case ET_EXEC: return "EXEC (Executable file)"; case ET_DYN: return "DYN (Shared object file)"; case ET_CORE: return "CORE (Core file)"; default: if ((e_type >= ET_LOPROC) && (e_type <= ET_HIPROC)) snprintf(buff, sizeof(buff), ("Processor Specific: (%x)"), e_type); else if ((e_type >= ET_LOOS) && (e_type <= ET_HIOS)) snprintf(buff, sizeof(buff), ("OS Specific: (%x)"), e_type); else snprintf(buff, sizeof(buff), ("<unknown>: %x"), e_type); return buff; } } const char *ELF_process::get_machine_name(unsigned e_machine) { static char buff[64]; switch (e_machine){ case EM_NONE: return ("None"); case EM_AARCH64: return "AArch64"; case EM_M32: return "WE32100"; case EM_SPARC: return "Sparc"; case EM_386: return "Intel 80386"; case EM_68K: return "MC68000"; case EM_88K: return "MC88000"; case EM_860: return "Intel 80860"; case EM_MIPS: return "MIPS R3000"; case EM_S370: return "IBM System/370"; case EM_MIPS_RS3_LE: return "MIPS R4000 big-endian"; case EM_PARISC: return "HPPA"; case EM_SPARC32PLUS: return "Sparc v8+" ; case EM_960: return "Intel 90860"; case EM_PPC: return "PowerPC"; case EM_PPC64: return "PowerPC64"; case EM_FR20: return "Fujitsu FR20"; case EM_RH32: return "TRW RH32"; case EM_ARM: return "ARM"; case EM_SH: return "Renesas / SuperH SH"; case EM_SPARCV9: return "Sparc v9"; case EM_TRICORE: return "Siemens Tricore"; case EM_ARC: return "ARC"; case EM_H8_300: return "Renesas H8/300"; case EM_H8_300H: return "Renesas H8/300H"; case EM_H8S: return "Renesas H8S"; case EM_H8_500: return "Renesas H8/500"; case EM_IA_64: return "Intel IA-64"; case EM_MIPS_X: return "Stanford MIPS-X"; case EM_COLDFIRE: return "Motorola Coldfire"; case EM_ALPHA: return "Alpha"; case EM_D10V: return "d10v"; case EM_D30V: return "d30v"; case EM_M32R: return "Renesas M32R (formerly Mitsubishi M32r)"; case EM_V800: return "Renesas V850 (using RH850 ABI)"; case EM_V850: return "Renesas V850"; case EM_MN10300: return "mn10300"; case EM_MN10200: return "mn10200"; case EM_FR30: return "Fujitsu FR30"; case EM_PJ: return "picoJava"; case EM_MMA: return "Fujitsu Multimedia Accelerator"; case EM_PCP: return "Siemens PCP"; case EM_NCPU: return "Sony nCPU embedded RISC processor"; case EM_NDR1: return "Denso NDR1 microprocesspr"; case EM_STARCORE: return "Motorola Star*Core processor"; case EM_ME16: return "Toyota ME16 processor"; case EM_ST100: return "STMicroelectronics ST100 processor"; case EM_TINYJ: return "Advanced Logic Corp. TinyJ embedded processor"; case EM_PDSP: return "Sony DSP processor"; case EM_FX66: return "Siemens FX66 microcontroller"; case EM_ST9PLUS: return "STMicroelectronics ST9+ 8/16 bit microcontroller"; case EM_ST7: return "STMicroelectronics ST7 8-bit microcontroller"; case EM_68HC16: return "Motorola MC68HC16 Microcontroller"; case EM_68HC12: return "Motorola MC68HC12 Microcontroller"; case EM_68HC11: return "Motorola MC68HC11 Microcontroller"; case EM_68HC08: return "Motorola MC68HC08 Microcontroller"; case EM_68HC05: return "Motorola MC68HC05 Microcontroller"; case EM_SVX: return "Silicon Graphics SVx"; case EM_ST19: return "STMicroelectronics ST19 8-bit microcontroller"; case EM_VAX: return "Digital VAX"; case EM_AVR: return "Atmel AVR 8-bit microcontroller"; case EM_CRIS: return "Axis Communications 32-bit embedded processor"; case EM_JAVELIN: return "Infineon Technologies 32-bit embedded cpu"; case EM_FIREPATH: return "Element 14 64-bit DSP processor"; case EM_ZSP: return "LSI Logic‘s 16-bit DSP processor"; case EM_MMIX: return "Donald Knuth‘s educational 64-bit processor"; case EM_HUANY: return "Harvard Universitys‘s machine-independent object format"; case EM_PRISM: return "Vitesse Prism"; case EM_X86_64: return "Advanced Micro Devices X86-64"; case EM_S390: return "IBM S/390"; case EM_OPENRISC: case EM_ARC_A5: return "ARC International ARCompact processor"; case EM_XTENSA: return "Tensilica Xtensa Processor"; case EM_MICROBLAZE: case EM_TILEPRO: return "Tilera TILEPro multicore architecture family"; case EM_TILEGX: return "Tilera TILE-Gx multicore architecture family"; default: snprintf (buff, sizeof (buff), ("<unknown>: 0x%x"), e_machine); } return buff; } int ELF_process::process_section_headers(FILE *file) { Elf32_Shdr * section; section = NULL; char * string_table; unsigned int flag_shoff; if (elf_header.e_shnum == 0){ if (elf_header.e_shoff!=0) printf("possibly corrupt ELF file header - it has a non-zero section header offset, but no section headers\n"); else printf ("\nThere are no sections in this file.\n"); return 1; } printf (" There are %d section headers, starting at offset 0x%lx:\n", elf_header.e_shnum, (unsigned long) elf_header.e_shoff); if (is_32bit_elf) { if (! get_32bit_section_headers (file, elf_header.e_shnum)) return 0; } /* Read in the string table, so that we have names to display. */ if (elf_header.e_shstrndx != SHN_UNDEF && elf_header.e_shstrndx < elf_header.e_shnum) { section = section_headers + elf_header.e_shstrndx; flag_shoff = section->sh_offset; } if (elf_header.e_shnum > 1) printf ("\nSection Headers:\n"); else printf ("\nSection Header:\n"); section = section_headers; unsigned int countC; if (is_32bit_elf){ printf(" [Nr] Name Type Addr Off Size ES Flg Lk Inf Al\n"); for (int i = 0; i < elf_header.e_shnum; i++, section++) { printf (" [%2u] ", i); countC = flag_shoff + section->sh_name; fseek(file,countC,SEEK_SET); char string_name[20]; fread(string_name,20,1,file); printf("%-16s ",string_name); printf ( " %-15.15s ", get_section_type_name (section->sh_type)); printf("%6.8lx",(unsigned long) section->sh_addr); printf ( " %6.6lx %6.6lx %2.2lx", (unsigned long) section->sh_offset, (unsigned long) section->sh_size, (unsigned long) section->sh_entsize); if (section->sh_flags) printf (" %2.2x ", section->sh_flags); else printf("%4c",32); printf ("%2u ", section->sh_link); printf ("%3u %3lu", section->sh_info, (unsigned long) section->sh_addralign); if (strcmp(string_name,".dynamic")==0) { dynamic_addr = section->sh_offset; dynamic_size = section->sh_size; } if (strcmp(string_name,".rel.dyn")==0){ rel_dyn_offset = section->sh_offset; rel_dyn_size = section->sh_size; } if(strcmp(string_name,".dynsym")==0){ sym_dyn_offset = section->sh_offset; sym_dyn_size = section->sh_size; } if(strcmp(string_name,".dynstr")==0){ str_dyn_offset = section->sh_offset; str_dyn_size = section->sh_size; } printf("\n"); } } return 1; } const char *ELF_process::get_section_type_name(unsigned int sh_type) { static char buff[32]; switch (sh_type){ case SHT_NULL: return "NULL"; case SHT_PROGBITS: return "PROGBITS"; case SHT_SYMTAB: return "SYMTAB"; case SHT_STRTAB: return "STRTAB"; case SHT_RELA: return "RELA"; case SHT_HASH: return "HASH"; case SHT_DYNAMIC: return "DYNAMIC"; case SHT_NOTE: return "NOTE"; case SHT_NOBITS: return "NOBITS"; case SHT_REL: return "REL"; case SHT_SHLIB: return "SHLIB"; case SHT_DYNSYM: return "DYNSYM"; case SHT_INIT_ARRAY: return "INIT_ARRAY"; case SHT_FINI_ARRAY: return "FINI_ARRAY"; case SHT_PREINIT_ARRAY: return "PREINIT_ARRAY"; case SHT_GNU_HASH: return "GNU_HASH"; case SHT_GROUP: return "GROUP"; case SHT_SYMTAB_SHNDX: return "SYMTAB SECTION INDICIES"; case SHT_GNU_verdef: return "VERDEF"; case SHT_GNU_verneed: return "VERNEED"; case SHT_GNU_versym: return "VERSYM"; case 0x6ffffff0: return "VERSYM"; case 0x6ffffffc: return "VERDEF"; case 0x7ffffffd: return "AUXILIARY"; case 0x7fffffff: return "FILTER"; case SHT_GNU_LIBLIST: return "GNU_LIBLIST"; default: if ((sh_type >= SHT_LOPROC) && (sh_type <= SHT_HIPROC)){ const char * result; switch (elf_header.e_machine){ case EM_MIPS: case EM_MIPS_RS3_LE: result = get_mips_section_type_name (sh_type); break; case EM_PARISC: result = get_parisc_section_type_name (sh_type); break; case EM_IA_64: result = get_ia64_section_type_name (sh_type); break; case EM_X86_64: case EM_L1OM: case EM_K1OM: result = get_x86_64_section_type_name (sh_type); break; case EM_AARCH64: result = get_aarch64_section_type_name (sh_type); break; case EM_ARM: result = get_arm_section_type_name (sh_type); break; case EM_TI_C6000: result = get_tic6x_section_type_name (sh_type); break; case EM_MSP430: result = get_msp430x_section_type_name (sh_type); break; default: result = NULL; break; } if (result != NULL) return result; sprintf (buff, "LOPROC+%x", sh_type - SHT_LOPROC); } else if ((sh_type >= SHT_LOOS) && (sh_type <= SHT_HIOS)) { const char * result; switch (elf_header.e_machine) { case EM_IA_64: result = get_ia64_section_type_name (sh_type); break; default: result = NULL; break; } if (result != NULL) return result; sprintf (buff, "LOOS+%x", sh_type - SHT_LOOS); } else if ((sh_type >= SHT_LOUSER) && (sh_type <= SHT_HIUSER)) sprintf (buff, "LOUSER+%x", sh_type - SHT_LOUSER); else /* This message is probably going to be displayed in a 15 character wide field, so put the hex value first. */ snprintf (buff, sizeof (buff), ("%08x: <unknown>"), sh_type); return buff; } } const char *ELF_process::get_mips_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_MIPS_LIBLIST: return "MIPS_LIBLIST"; case SHT_MIPS_MSYM: return "MIPS_MSYM"; case SHT_MIPS_CONFLICT: return "MIPS_CONFLICT"; case SHT_MIPS_GPTAB: return "MIPS_GPTAB"; case SHT_MIPS_UCODE: return "MIPS_UCODE"; case SHT_MIPS_DEBUG: return "MIPS_DEBUG"; case SHT_MIPS_REGINFO: return "MIPS_REGINFO"; case SHT_MIPS_PACKAGE: return "MIPS_PACKAGE"; case SHT_MIPS_PACKSYM: return "MIPS_PACKSYM"; case SHT_MIPS_RELD: return "MIPS_RELD"; case SHT_MIPS_IFACE: return "MIPS_IFACE"; case SHT_MIPS_CONTENT: return "MIPS_CONTENT"; case SHT_MIPS_OPTIONS: return "MIPS_OPTIONS"; case SHT_MIPS_SHDR: return "MIPS_SHDR"; case SHT_MIPS_FDESC: return "MIPS_FDESC"; case SHT_MIPS_EXTSYM: return "MIPS_EXTSYM"; case SHT_MIPS_DENSE: return "MIPS_DENSE"; case SHT_MIPS_PDESC: return "MIPS_PDESC"; case SHT_MIPS_LOCSYM: return "MIPS_LOCSYM"; case SHT_MIPS_AUXSYM: return "MIPS_AUXSYM"; case SHT_MIPS_OPTSYM: return "MIPS_OPTSYM"; case SHT_MIPS_LOCSTR: return "MIPS_LOCSTR"; case SHT_MIPS_LINE: return "MIPS_LINE"; case SHT_MIPS_RFDESC: return "MIPS_RFDESC"; case SHT_MIPS_DELTASYM: return "MIPS_DELTASYM"; case SHT_MIPS_DELTAINST: return "MIPS_DELTAINST"; case SHT_MIPS_DELTACLASS: return "MIPS_DELTACLASS"; case SHT_MIPS_DWARF: return "MIPS_DWARF"; case SHT_MIPS_DELTADECL: return "MIPS_DELTADECL"; case SHT_MIPS_SYMBOL_LIB: return "MIPS_SYMBOL_LIB"; case SHT_MIPS_EVENTS: return "MIPS_EVENTS"; case SHT_MIPS_TRANSLATE: return "MIPS_TRANSLATE"; case SHT_MIPS_PIXIE: return "MIPS_PIXIE"; case SHT_MIPS_XLATE: return "MIPS_XLATE"; case SHT_MIPS_XLATE_DEBUG: return "MIPS_XLATE_DEBUG"; case SHT_MIPS_WHIRL: return "MIPS_WHIRL"; case SHT_MIPS_EH_REGION: return "MIPS_EH_REGION"; case SHT_MIPS_XLATE_OLD: return "MIPS_XLATE_OLD"; case SHT_MIPS_PDR_EXCEPTION: return "MIPS_PDR_EXCEPTION"; default: break; } return NULL; } const char *ELF_process::get_parisc_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_PARISC_EXT: return "PARISC_EXT"; case SHT_PARISC_UNWIND: return "PARISC_UNWIND"; case SHT_PARISC_DOC: return "PARISC_DOC"; case SHT_PARISC_ANNOT: return "PARISC_ANNOT"; case SHT_PARISC_SYMEXTN: return "PARISC_SYMEXTN"; case SHT_PARISC_STUBS: return "PARISC_STUBS"; case SHT_PARISC_DLKM: return "PARISC_DLKM"; default: break; } return NULL; } const char *ELF_process::get_ia64_section_type_name(unsigned int sh_type) { /* If the top 8 bits are 0x78 the next 8 are the os/abi ID. */ if ((sh_type & 0xFF000000) == SHT_IA_64_LOPSREG) return get_osabi_name ((sh_type & 0x00FF0000) >> 16); switch (sh_type) { case SHT_IA_64_EXT: return "IA_64_EXT"; case SHT_IA_64_UNWIND: return "IA_64_UNWIND"; case SHT_IA_64_PRIORITY_INIT: return "IA_64_PRIORITY_INIT"; case SHT_IA_64_VMS_TRACE: return "VMS_TRACE"; case SHT_IA_64_VMS_TIE_SIGNATURES: return "VMS_TIE_SIGNATURES"; case SHT_IA_64_VMS_DEBUG: return "VMS_DEBUG"; case SHT_IA_64_VMS_DEBUG_STR: return "VMS_DEBUG_STR"; case SHT_IA_64_VMS_LINKAGES: return "VMS_LINKAGES"; case SHT_IA_64_VMS_SYMBOL_VECTOR: return "VMS_SYMBOL_VECTOR"; case SHT_IA_64_VMS_FIXUP: return "VMS_FIXUP"; default: break; } return NULL; } const char *ELF_process::get_x86_64_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_X86_64_UNWIND: return "X86_64_UNWIND"; default: break; } return NULL; } const char *ELF_process::get_aarch64_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_AARCH64_ATTRIBUTES: return "AARCH64_ATTRIBUTES"; default: break; } return NULL; } const char *ELF_process::get_arm_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_ARM_EXIDX: return "ARM_EXIDX"; case SHT_ARM_PREEMPTMAP: return "ARM_PREEMPTMAP"; case SHT_ARM_ATTRIBUTES: return "ARM_ATTRIBUTES"; case SHT_ARM_DEBUGOVERLAY: return "ARM_DEBUGOVERLAY"; case SHT_ARM_OVERLAYSECTION: return "ARM_OVERLAYSECTION"; default: break; } return NULL; } const char *ELF_process::get_tic6x_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_C6000_UNWIND: return "C6000_UNWIND"; case SHT_C6000_PREEMPTMAP: return "C6000_PREEMPTMAP"; case SHT_C6000_ATTRIBUTES: return "C6000_ATTRIBUTES"; case SHT_TI_ICODE: return "TI_ICODE"; case SHT_TI_XREF: return "TI_XREF"; case SHT_TI_HANDLER: return "TI_HANDLER"; case SHT_TI_INITINFO: return "TI_INITINFO"; case SHT_TI_PHATTRS: return "TI_PHATTRS"; default: break; } return NULL; } const char *ELF_process::get_msp430x_section_type_name(unsigned int sh_type) { switch (sh_type) { case SHT_MSP430_SEC_FLAGS: return "MSP430_SEC_FLAGS"; case SHT_MSP430_SYM_ALIASES: return "MSP430_SYM_ALIASES"; case SHT_MSP430_ATTRIBUTES: return "MSP430_ATTRIBUTES"; default: return NULL; } } const char *ELF_process::get_segment_type(unsigned int p_type) { static char buff[32]; switch (p_type) { case PT_NULL: return "NULL"; case PT_LOAD: return "LOAD"; case PT_DYNAMIC: return "DYNAMIC"; case PT_INTERP: return "INTERP"; case PT_NOTE: return "NOTE"; case PT_SHLIB: return "SHLIB"; case PT_PHDR: return "PHDR"; case PT_TLS: return "TLS"; case PT_GNU_EH_FRAME: return "GNU_EH_FRAME"; case PT_GNU_STACK: return "GNU_STACK"; case PT_GNU_RELRO: return "GNU_RELRO"; default: if ((p_type >= PT_LOPROC) && (p_type <= PT_HIPROC)) { const char * result; switch (elf_header.e_machine) { case EM_AARCH64: result = get_aarch64_segment_type (p_type); break; case EM_ARM: result = get_arm_segment_type (p_type); break; case EM_MIPS: case EM_MIPS_RS3_LE: result = get_mips_segment_type (p_type); break; case EM_PARISC: result = get_parisc_segment_type (p_type); break; case EM_IA_64: result = get_ia64_segment_type (p_type); break; case EM_TI_C6000: result = get_tic6x_segment_type (p_type); break; default: result = NULL; break; } if (result != NULL) return result; sprintf (buff, "LOPROC+%x", p_type - PT_LOPROC); } else if ((p_type >= PT_LOOS) && (p_type <= PT_HIOS)) { const char * result; switch (elf_header.e_machine) { case EM_PARISC: result = get_parisc_segment_type (p_type); break; case EM_IA_64: result = get_ia64_segment_type (p_type); break; default: result = NULL; break; } if (result != NULL) return result; sprintf (buff, "LOOS+%x", p_type - PT_LOOS); } else snprintf (buff, sizeof (buff), ("<unknown>: %x"), p_type); return buff; } } int ELF_process::process_program_headers(FILE *file) { Elf32_Phdr* segment; unsigned long dynamic_addr; if(elf_header.e_phnum == 0){ if(elf_header.e_phoff!=0){ printf ("possibly corrupt ELF header - it has a non-zero program" " header offset, but no program headers"); } else { printf ("\nThere are no program headers in this file.\n"); return 0; } }else{ printf ("\nProgram Headers:\n"); if(is_32bit_elf) printf(" Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align\n"); else printf(" Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align\n"); } if (! get_program_headers (file)) return 0; unsigned int i; for (i = 0, segment = program_headers; i < elf_header.e_phnum; i++, segment++){ printf (" %-14.14s ", get_segment_type (segment->p_type)); if(is_32bit_elf){ printf ("0x%6.6x ", (unsigned int) segment->p_offset); printf ("0x%8.8x ", (unsigned int) segment->p_vaddr); printf ("0x%8.8x ", (unsigned int) segment->p_paddr); printf ("0x%5.5x ", (unsigned int) segment->p_filesz); printf ("0x%5.5x ", (unsigned int) segment->p_memsz); printf ("%c%c%c ", (segment->p_flags & PF_R ? ‘R‘ : ‘ ‘), (segment->p_flags & PF_W ? ‘W‘ : ‘ ‘), (segment->p_flags & PF_X ? ‘E‘ : ‘ ‘)); printf ("%#x", (unsigned int) segment->p_align); } printf("\n"); } return 0; } const char *ELF_process::get_aarch64_segment_type(unsigned long type) { switch (type) { case PT_AARCH64_ARCHEXT: return "AARCH64_ARCHEXT"; default: break; } return NULL; } const char *ELF_process::get_arm_segment_type(unsigned long type) { switch (type) { case PT_ARM_EXIDX: return "EXIDX"; default: break; } return NULL; } const char *ELF_process::get_mips_segment_type(unsigned long type) { switch (type) { case PT_MIPS_REGINFO: return "REGINFO"; case PT_MIPS_RTPROC: return "RTPROC"; case PT_MIPS_OPTIONS: return "OPTIONS"; default: break; } return NULL; } const char *ELF_process::get_parisc_segment_type(unsigned long type) { switch (type) { case PT_HP_TLS: return "HP_TLS"; case PT_HP_CORE_NONE: return "HP_CORE_NONE"; case PT_HP_CORE_VERSION: return "HP_CORE_VERSION"; case PT_HP_CORE_KERNEL: return "HP_CORE_KERNEL"; case PT_HP_CORE_COMM: return "HP_CORE_COMM"; case PT_HP_CORE_PROC: return "HP_CORE_PROC"; case PT_HP_CORE_LOADABLE: return "HP_CORE_LOADABLE"; case PT_HP_CORE_STACK: return "HP_CORE_STACK"; case PT_HP_CORE_SHM: return "HP_CORE_SHM"; case PT_HP_CORE_MMF: return "HP_CORE_MMF"; case PT_HP_PARALLEL: return "HP_PARALLEL"; case PT_HP_FASTBIND: return "HP_FASTBIND"; case PT_HP_OPT_ANNOT: return "HP_OPT_ANNOT"; case PT_HP_HSL_ANNOT: return "HP_HSL_ANNOT"; case PT_HP_STACK: return "HP_STACK"; case PT_HP_CORE_UTSNAME: return "HP_CORE_UTSNAME"; case PT_PARISC_ARCHEXT: return "PARISC_ARCHEXT"; case PT_PARISC_UNWIND: return "PARISC_UNWIND"; case PT_PARISC_WEAKORDER: return "PARISC_WEAKORDER"; default: break; } return NULL; } const char *ELF_process::get_ia64_segment_type(unsigned long type) { switch (type) { case PT_IA_64_ARCHEXT: return "IA_64_ARCHEXT"; case PT_IA_64_UNWIND: return "IA_64_UNWIND"; case PT_HP_TLS: return "HP_TLS"; case PT_IA_64_HP_OPT_ANOT: return "HP_OPT_ANNOT"; case PT_IA_64_HP_HSL_ANOT: return "HP_HSL_ANNOT"; case PT_IA_64_HP_STACK: return "HP_STACK"; default: break; } return NULL; } #define PT_C6000_PHATTR 0x70000000 const char *ELF_process::get_tic6x_segment_type(unsigned long type) { switch (type) { case PT_C6000_PHATTR: return "C6000_PHATTR"; default: break; } return NULL; } int ELF_process::get_program_headers(FILE *file) { Elf32_Phdr* phdrs; Elf64_Phdr* phdrs64; /* Check cache of prior read. */ if (program_headers != NULL) return 1; phdrs = (Elf32_Phdr *) cmalloc (elf_header.e_phnum, sizeof (Elf32_Phdr)); if (phdrs == NULL) { printf("Out of memory\n"); return 0; } if (is_32bit_elf ? get_32bit_program_headers (file, phdrs) : get_64bit_program_headers (file, phdrs64)) { program_headers = phdrs; return 1; } free (phdrs); return 0; } int ELF_process::get_32bit_program_headers(FILE *file, Elf32_Phdr *pheaders) { Elf32_External_Phdr* phdrs; Elf32_External_Phdr* external; Elf32_Phdr* internal; unsigned int i; phdrs = (Elf32_External_Phdr *) get_data (NULL, file, elf_header.e_phoff, elf_header.e_phentsize, elf_header.e_phnum, ("program headers")); if (!phdrs) return 0; for (i = 0, internal = pheaders, external = phdrs; i < elf_header.e_phnum; i++, internal++, external++){ internal->p_type = BYTE_GET (external->p_type); internal->p_offset = BYTE_GET (external->p_offset); internal->p_vaddr = BYTE_GET (external->p_vaddr); internal->p_paddr = BYTE_GET (external->p_paddr); internal->p_filesz = BYTE_GET (external->p_filesz); internal->p_memsz = BYTE_GET (external->p_memsz); internal->p_flags = BYTE_GET (external->p_flags); internal->p_align = BYTE_GET (external->p_align); } free (phdrs); return 1; } int ELF_process::get_64bit_program_headers(FILE *file, Elf64_Phdr *pheaders) { return 0; } int ELF_process::process_dynamic_section(FILE *file) { Elf32_Dyn * entry; if (is_32bit_elf){ if (! get_32bit_dynamic_section (file)) return 0; } else if (! get_64bit_dynamic_section (file)) return 0; if(dynamic_addr){ printf ("\nDynamic section at offset 0x%x contains %u entries:\n", dynamic_addr, dynamic_nent); printf (" Tag Type Name/Value\n"); } for (entry = dynamic_section; entry < dynamic_section + dynamic_nent; entry++){ const char * dtype; putchar (‘ ‘); printf("0x%2.8x ",entry->d_tag); dtype = get_dynamic_type(entry->d_tag); printf("(%s)%*s",dtype,(27-strlen(dtype))," "); switch (entry->d_tag){ case DT_FLAGS: print_dynamic_flags (entry->d_un.d_val); break; case DT_AUXILIARY: case DT_FILTER: case DT_CONFIG: case DT_DEPAUDIT: case DT_AUDIT: switch (entry->d_tag) { case DT_AUXILIARY: printf ("Auxiliary library"); break; case DT_FILTER: printf ("Filter library"); break; case DT_CONFIG: printf ("Configuration file"); break; case DT_DEPAUDIT: printf ("Dependency audit library"); break; case DT_AUDIT: printf ("Audit library"); break; } break; default: printf("0x%x",entry->d_un.d_val); } printf("\n"); } } int ELF_process::get_32bit_dynamic_section(FILE *file) { Elf32_External_Dyn * edyn = (Elf32_External_Dyn *) malloc(dynamic_size); Elf32_External_Dyn * ext; Elf32_Dyn * entry; fseek(file,dynamic_addr,SEEK_SET); fread(edyn,dynamic_size,1,file); if(edyn==NULL) return 0; for (ext = edyn, dynamic_nent = 0; (char *) ext < (char *) edyn + dynamic_size; ext++) { dynamic_nent++; if (BYTE_GET (ext->d_tag) == DT_NULL) break; } dynamic_section = (Elf32_Dyn *) cmalloc (dynamic_nent, sizeof (* entry)); if (dynamic_section == NULL) { printf("Out of memory\n"); free (edyn); return 0; } for (ext = edyn, entry = dynamic_section; entry < dynamic_section + dynamic_nent; ext++, entry++) { entry->d_tag = BYTE_GET (ext->d_tag); entry->d_un.d_val = BYTE_GET (ext->d_un.d_val); } free(edyn); return 1; } int ELF_process::get_64bit_dynamic_section(FILE *file) { return 0; } void ELF_process::print_dynamic_flags(Elf32_Word flags) { int first = 1; while (flags) { Elf32_Word flag; flag = flags & - flags; flags &= ~ flag; if (first) first = 0; else putc (‘ ‘, stdout); switch (flag) { case DF_ORIGIN: fputs ("ORIGIN", stdout); break; case DF_SYMBOLIC: fputs ("SYMBOLIC", stdout); break; case DF_TEXTREL: fputs ("TEXTREL", stdout); break; case DF_BIND_NOW: fputs ("BIND_NOW", stdout); break; case DF_STATIC_TLS: fputs ("STATIC_TLS", stdout); break; default: fputs (("unknown"), stdout); break; } } } #define DT_FEATURE 0x6ffffdfc #define DT_USED 0x7ffffffe const char *ELF_process::get_dynamic_type(unsigned long type) { static char buff[64]; switch (type){ case DT_NULL: return "NULL"; case DT_NEEDED: return "NEEDED"; case DT_PLTRELSZ: return "PLTRELSZ"; case DT_PLTGOT: return "PLTGOT"; case DT_HASH: return "HASH"; case DT_STRTAB: return "STRTAB"; case DT_SYMTAB: return "SYMTAB"; case DT_RELA: return "RELA"; case DT_RELASZ: return "RELASZ"; case DT_RELAENT: return "RELAENT"; case DT_STRSZ: return "STRSZ"; case DT_SYMENT: return "SYMENT"; case DT_INIT: return "INIT"; case DT_FINI: return "FINI"; case DT_SONAME: return "SONAME"; case DT_RPATH: return "RPATH"; case DT_SYMBOLIC: return "SYMBOLIC"; case DT_REL: return "REL"; case DT_RELSZ: return "RELSZ"; case DT_RELENT: return "RELENT"; case DT_PLTREL: return "PLTREL"; case DT_DEBUG: return "DEBUG"; case DT_TEXTREL: return "TEXTREL"; case DT_JMPREL: return "JMPREL"; case DT_BIND_NOW: return "BIND_NOW"; case DT_INIT_ARRAY: return "INIT_ARRAY"; case DT_FINI_ARRAY: return "FINI_ARRAY"; case DT_INIT_ARRAYSZ: return "INIT_ARRAYSZ"; case DT_FINI_ARRAYSZ: return "FINI_ARRAYSZ"; case DT_RUNPATH: return "RUNPATH"; case DT_FLAGS: return "FLAGS"; case DT_PREINIT_ARRAY: return "PREINIT_ARRAY"; case DT_PREINIT_ARRAYSZ: return "PREINIT_ARRAYSZ"; case DT_CHECKSUM: return "CHECKSUM"; case DT_PLTPADSZ: return "PLTPADSZ"; case DT_MOVEENT: return "MOVEENT"; case DT_MOVESZ: return "MOVESZ"; case DT_FEATURE: return "FEATURE"; case DT_POSFLAG_1: return "POSFLAG_1"; case DT_SYMINSZ: return "SYMINSZ"; case DT_SYMINENT: return "SYMINENT"; /* aka VALRNGHI */ case DT_ADDRRNGLO: return "ADDRRNGLO"; case DT_CONFIG: return "CONFIG"; case DT_DEPAUDIT: return "DEPAUDIT"; case DT_AUDIT: return "AUDIT"; case DT_PLTPAD: return "PLTPAD"; case DT_MOVETAB: return "MOVETAB"; case DT_SYMINFO: return "SYMINFO"; /* aka ADDRRNGHI */ case DT_VERSYM: return "VERSYM"; case DT_TLSDESC_GOT: return "TLSDESC_GOT"; case DT_TLSDESC_PLT: return "TLSDESC_PLT"; case DT_RELACOUNT: return "RELACOUNT"; case DT_RELCOUNT: return "RELCOUNT"; case DT_FLAGS_1: return "FLAGS_1"; case DT_VERDEF: return "VERDEF"; case DT_VERDEFNUM: return "VERDEFNUM"; case DT_VERNEED: return "VERNEED"; case DT_VERNEEDNUM: return "VERNEEDNUM"; case DT_AUXILIARY: return "AUXILIARY"; case DT_USED: return "USED"; case DT_FILTER: return "FILTER"; case DT_GNU_PRELINKED: return "GNU_PRELINKED"; case DT_GNU_CONFLICT: return "GNU_CONFLICT"; case DT_GNU_CONFLICTSZ: return "GNU_CONFLICTSZ"; case DT_GNU_LIBLIST: return "GNU_LIBLIST"; case DT_GNU_LIBLISTSZ: return "GNU_LIBLISTSZ"; case DT_GNU_HASH: return "GNU_HASH"; } return nullptr; } #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) #define FALSE 0 #define TRUE 1 #define UNKNOWN -1 static struct { const char * name; int reloc; int size; int rela; } dynamic_relocations [] = { { "REL", DT_REL, DT_RELSZ, FALSE }, { "RELA", DT_RELA, DT_RELASZ, TRUE }, { "PLT", DT_JMPREL, DT_PLTRELSZ, UNKNOWN } }; Elf32_Rel* elf32_rel; int ELF_process::process_relocs(FILE *file) { Elf32_Rel* entry_rel; if(is_32bit_elf){ get_32bit_rel(file,rel_dyn_offset); } else{ //64位... } printf (" \nat offset 0x%2.2x contains %u entries:\n", rel_dyn_offset, rel_nent); printf (" Offset Info Type Sym. Value Sym. Name\n"); for (entry_rel = elf32_rel; entry_rel < elf32_rel + rel_nent; entry_rel++) { printf("%10.8x ",entry_rel->r_offset); printf("%15.8x\n",entry_rel->r_info); } return 0; } void ELF_process::get_32bit_rel(FILE *pFILE, unsigned int offset) { Elf32_External_Rel* rel= (Elf32_External_Rel *) malloc(rel_dyn_size); Elf32_External_Rel* ext; Elf32_Rel* relt; fseek(pFILE,offset,SEEK_SET); fread(rel,rel_dyn_size,1,pFILE); if(rel==NULL) return; for (ext = rel, rel_nent = 0; (char *) ext < (char *) rel + rel_dyn_size; ext++) { rel_nent++; if (BYTE_GET (rel->r_offset) == DT_NULL) break; } elf32_rel = (Elf32_Rel *) cmalloc (dynamic_nent, sizeof (* relt)); for (ext = rel, relt = elf32_rel; relt < elf32_rel + rel_nent; ext++, relt++) { relt->r_offset = BYTE_GET (ext->r_offset); relt->r_info = BYTE_GET (ext->r_info); } free(rel); return; } void ELF_process::process_symbol_table(FILE *pFILE) { Elf32_Sym* sym; get_32bit_symbol(pFILE); printf("\n"); unsigned int i; for ( i=0, sym = sym_dyn;sym<sym_dyn+sym_nent;sym++,i++) { printf("%2d: ",i); printf("%2.8x ",sym->st_value); printf("%-2.2x",sym->st_shndx); printf("%-12.2x ",sym->st_other); printf("%-12.2x ",sym->st_info); printf("%-12.2x ",sym->st_size); get_32bit_strdyn(pFILE,sym->st_name); } } void ELF_process::get_32bit_symbol(FILE *pFILE) { Elf32_External_Sym* exty = (Elf32_External_Sym *) malloc(sym_dyn_size); Elf32_External_Sym* ext; Elf32_Sym* symbool; fseek(pFILE,sym_dyn_offset,SEEK_SET); fread(exty,sym_dyn_size,1,pFILE); if (!exty) return; for (ext = exty, sym_nent = 0; (char *) ext < (char *) exty + sym_dyn_size; ext++) { sym_nent++; } sym_dyn = (Elf32_Sym *) cmalloc (sym_nent, sizeof (* exty)); for (ext = exty, symbool = sym_dyn ; symbool < sym_dyn + sym_nent; ext++, symbool++) { symbool->st_name = BYTE_GET(ext->st_name); symbool->st_info = BYTE_GET(ext->st_info); symbool->st_other = BYTE_GET(ext->st_other); symbool->st_shndx = BYTE_GET(ext->st_shndx); symbool->st_size = BYTE_GET(ext->st_size); symbool->st_value = http://www.mamicode.com/BYTE_GET(ext->st_value); //printf("%2.2x ",sym_dyn->st_name); } free(exty); return; } void ELF_process::get_32bit_strdyn(FILE *pFILE, Elf32_Word name) { unsigned char sym_name[1024]; fseek(pFILE,(str_dyn_offset+name),SEEK_SET); fread(sym_name,1024,1,pFILE); printf("%s\n",sym_name); }
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