diff options
Diffstat (limited to 'elfreader.h')
| -rw-r--r-- | elfreader.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/elfreader.h b/elfreader.h new file mode 100644 index 0000000..50e08a7 --- /dev/null +++ b/elfreader.h @@ -0,0 +1,158 @@ +#ifndef __ELFREADER_H +#define __ELFREADER_H + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <elf.h> + +#include "debug.h" +#include "assert.h" + +#define SWP16(X) (((X)&0x00FF)<<8)|(((X)&0xFF00)>>8) +#define SWP32(X) ((((X)&0x00FF)<<24)|(((X)&0xFF00)<<8)|(((X)&0xFF0000)>>8)|(((X)&0xFF000000)>>24)) + + +#define ELF_TYPE_UNKNOWN 0 +#define ELF_TYPE_32 1 +#define ELF_TYPE_64 2 + +/* if you add header on Intel(LE) on MIPS(be) arch + then you going to have troubles. Lets prepare for this troubles + */ +#define ELF_ENONE 0 +#define ELF_LLSB 1 +#define ELF_LMSB 2 +#define ELF_MLSB 3 +#define ELF_MMSB 4 + +typedef struct Elf_Ident { + unsigned char ident[EI_NIDENT]; +} Elf_Ident; + + +/* +++++++++++++++++++++++++++++++++++++ ++ Type + ELF32 + ELF64 + +++++++++++++++++++++++++++++++++++++ ++Half + uint16_t + uint16_t + ++Word + uint32_t + uint32_t + ++Sword + int32_t + int32_t + ++Xword + uint64_t + uint64_t + ++Sxword + int64_t + int64_t + ++Addr + uint32_t + uint64_t + ++Off + uint32_t + uint64_t + ++Section + uint16_t + uint16_t + ++Versym + uint16_t + uint16_t + +++++++++++++++++++++++++++++++++++++ +*/ + + +typedef struct Elf_Ehdr { + int type; /* to distinguish 32 or its 64 bits */ + int byteorder; + + /* generic elf header information */ + uint16_t e_type; + uint16_t e_machine; + uint32_t e_version; + uint64_t e_entry; + uint64_t e_phoff; + uint64_t e_shoff; + uint32_t e_flags; + uint16_t e_ehsize; + uint16_t e_phentsize; + uint16_t e_phnum; + uint16_t e_shentsize; + uint16_t e_shnum; + uint16_t e_shstrndx; +} Elf_Ehdr; + + +typedef struct Elf_Phdr { + int type; + uint32_t offset; /* Offset in file */ + int byteorder; + + /* generic progeam heaer information */ + uint32_t p_type; /* Segment type */ + uint64_t p_offset; /* Segment file offset */ + uint64_t p_vaddr; /* Segment virtual address */ + uint64_t p_paddr; /* Segment physical address */ + uint32_t p_filesz; /* Segment size in file */ + uint32_t p_memsz; /* Segment size in memory */ + uint32_t p_flags; /* Segment flags */ + uint32_t p_align; /* Segment alignment */ +} Elf_Phdr; + + +typedef struct Elf_Shdr { + int type; + uint32_t offset; /* Offset inside file */ + int byteorder; + + /* generic section header information */ + uint32_t sh_name; /* Section name (string tbl index) */ + uint32_t sh_type; /* Section type */ + uint64_t sh_flags; /* Section flags */ + uint64_t sh_addr; /* Section virtual addr at execution */ + uint64_t sh_offset; /* Section file offset */ + uint64_t sh_size; /* Section size in bytes */ + uint32_t sh_link; /* Link to another section */ + uint32_t sh_info; /* Additional section information */ + uint64_t sh_addralign; /* Section alignment */ + uint64_t sh_entsize; +} Elf_Shdr; + +typedef struct Elf_Shdr_strtab { + long offset; + int sz_tab; + uint8_t *strtab; +} Elf_Shdr_strtab; + +Elf_Ident* elf_ident( FILE *f ); +int ident_check( Elf_Ident *ident ); +void ident_info( Elf_Ident *ident ); + +/* +All headers can have different types or different offsets inside structure +should we write each function 2 times for 32/64? or just one generic function +and type convos in between? +*/ +/* ehdr := mapping ehdr32 */ +int elf_ehdr_32( Elf_Ehdr *ehdr, Elf32_Ehdr *ehdr32, int byteorder ); +/* ehdr := mapping ehdr64 */ +int elf_ehdr_64( Elf_Ehdr *ehdr, Elf64_Ehdr *ehdr64, int byteorder ); +/* ehdr32 := mapping ehdr */ +int elf_32_ehdr( Elf32_Ehdr *ehdr32, Elf_Ehdr *ehdr ); +/* ehdr64 := mapping ehdr */ +int elf_64_ehdr( Elf64_Ehdr *ehdr64, Elf_Ehdr *ehdr ); +int elf_ehdr32_bele( Elf32_Ehdr *ehdr32 ); +int elf_ehdr32_lebe( Elf32_Ehdr *ehdr32 ); +int elf_ehdr2mem( Elf_Ident *ident, Elf_Ehdr *ehdr, uint8_t *buf, int size ); +Elf_Ehdr* elf_header( FILE *f, Elf_Ident *ident, int sysorder ); +void header_info( Elf_Ehdr *ehdr ); + + +int elf_phdr_32( Elf_Phdr *phdr, Elf32_Phdr *phdr32 ); +int elf_phdr_64( Elf_Phdr *phdr, Elf64_Phdr *phdr64 ); +int elf_32_phdr( Elf32_Phdr *phdr32, Elf_Phdr *phdr ); +int elf_64_phdr( Elf64_Phdr *phdr64, Elf_Phdr *phdr ); +Elf_Phdr* elf_phdr( FILE *f, Elf_Ehdr *ehdr ); + + +int elf_shdr_32( Elf_Shdr *shdr, Elf32_Shdr *shdr32 ); +int elf_shdr_64( Elf_Shdr *shdr, Elf64_Shdr *shdr64 ); +int elf_32_shdr( Elf32_Shdr *shdr32, Elf_Shdr *shdr ); +int elf_64_shdr( Elf64_Shdr *shdr64, Elf_Shdr *shdr ); +int elf_shdr64_lebe( Elf64_Shdr *shdr64 ); +int elf_shdr32_lebe( Elf32_Shdr *shdr32 ); +int elf_shdr2mem( Elf_Shdr *shdr, uint8_t *buf, int size, int offset ); +Elf_Shdr** elf_shdr( FILE *f, Elf_Ehdr *ehdr ); +void section_info( Elf_Shdr* shdr, Elf_Shdr_strtab *strtab ); + +/* Search for strtab section */ +Elf_Shdr_strtab* strtab_search( FILE *f, Elf_Shdr **shdr ); +unsigned char* strtab_name( Elf_Shdr_strtab *strtab, long offset ); + +#endif
\ No newline at end of file |