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elf_local.h
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elf_local.h
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#ifndef __ELF_LOCAL
#define __ELF_LOCAL
#include <stdint.h>
struct Elf32_Ehdr {
uint8_t e_ident[16];
#define ELF_IDENT "\177ELF\x01\x01\x01"
#define EI_DATA 5 // endian-ness 1 == little-endian, 2 == big-endian
uint16_t e_type; /* Must be 2 for executable */
uint16_t e_machine; /* Must be 3 for i386 */
uint32_t e_version; /* Must be 1 */
uint32_t e_entry; /* Virtual address entry point */
uint32_t e_phoff; /* Program Header offset */
uint32_t e_shoff; /* Section Header offset */
uint32_t e_flags; /* Must be 0 */
uint16_t e_ehsize; /* ELF header's size */
uint16_t e_phentsize; /* Program header entry size */
uint16_t e_phnum; /* # program header entries */
uint16_t e_shentsize; /* Section header entry size */
uint16_t e_shnum; /* # section header entries */
uint16_t e_shstrndx; /* sect header # of str table */
};
enum ptype {
PT_NULL,
PT_LOAD,
PT_DYNAMIC,
PT_INTERP,
PT_NOTE,
PT_SHLIB,
PT_PHDR,
PT_TLS,
PT_NUM
};
struct Elf32_Phdr {
uint32_t p_type; /* Section type */
#define PT_LOOS 0x60000000
#define PT_HIOS 0x6fffffff
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PT_GNU_STACK (PT_LOOS + 0x474e551)
uint32_t p_offset; /* Offset into the file */
uint32_t p_vaddr; /* Virtual program address */
uint32_t p_paddr; /* Set to zero */
uint32_t p_filesz; /* Section bytes in file */
uint32_t p_memsz; /* Section bytes in memory */
uint32_t p_flags; /* section flags */
#define PF_X (1<<0) /* Mapped executable */
#define PF_W (1<<1) /* Mapped writable */
#define PF_R (1<<2) /* Mapped readable */
uint32_t p_align; /* Only used by core dumps */
};
struct Elf64_Ehdr {
uint8_t e_ident[16]; /* Magic number and other info */
uint16_t e_type; /* Object file type */
uint16_t e_machine; /* Architecture */
uint32_t e_version; /* Object file version */
uint64_t e_entry; /* Entry point virtual address */
uint64_t e_phoff; /* Program header table file offset */
uint64_t e_shoff; /* Section header table file offset */
uint32_t e_flags; /* Processor-specific flags */
uint16_t e_ehsize; /* ELF header size in bytes */
uint16_t e_phentsize; /* Program header table entry size */
uint16_t e_phnum; /* Program header table entry count */
uint16_t e_shentsize; /* Section header table entry size */
uint16_t e_shnum; /* Section header table entry count */
uint16_t e_shstrndx; /* Section header string table index */
};
struct Elf64_Phdr {
uint32_t p_type; /* Segment type */
uint32_t p_flags; /* Segment flags */
uint64_t p_offset; /* Segment file offset */
uint64_t p_vaddr; /* Segment virtual address */
uint64_t p_paddr; /* Segment physical address */
uint64_t p_filesz; /* Segment size in file */
uint64_t p_memsz; /* Segment size in memory */
uint64_t p_align; /* Segment alignment */
};
/* from linux/auxvec.h */
#define _AT_NULL 0 /* end of vector */
#define _AT_IGNORE 1 /* entry should be ignored */
#define _AT_EXECFD 2 /* file descriptor of program */
#define _AT_PHDR 3 /* program headers for program */
#define _AT_PHENT 4 /* size of program header entry */
#define _AT_PHNUM 5 /* number of program headers */
#define _AT_PAGESZ 6 /* system page size */
#define _AT_BASE 7 /* base address of interpreter */
#define _AT_FLAGS 8 /* flags */
#define _AT_ENTRY 9 /* entry point of program */
#define _AT_NOTELF 10 /* program is not ELF */
#define _AT_UID 11 /* real uid */
#define _AT_EUID 12 /* effective uid */
#define _AT_GID 13 /* real gid */
#define _AT_EGID 14 /* effective gid */
#define _AT_PLATFORM 15 /* string identifying CPU for optimizations */
#define _AT_HWCAP 16 /* arch dependent hints at CPU capabilities */
#define _AT_CLKTCK 17 /* frequency at which times() increments */
/* AT_* values 18 through 22 are reserved */
#define _AT_SECURE 23 /* secure mode boolean */
#define _AT_BASE_PLATFORM 24 /* string identifying real platform, may
* differ from AT_PLATFORM. */
#define _AT_RANDOM 25 /* address of 16 random bytes */
#define _AT_HWCAP2 26 /* extension of AT_HWCAP */
#define _AT_EXECFN 31 /* filename of program */
#define _AT_SYSINFO_EHDR 33 /* base of vdso */
typedef struct _elf_aux {
uint64_t entry;
uint64_t vdso;
uint64_t phdr;
uint64_t phnum;
uint64_t phent;
uint32_t uid;
uint32_t euid;
uint32_t gid;
uint32_t egid;
} elf_aux;
//altval indicies for kernel netnode
#define KERNEL_BRK 0
#define KERNEL_PID 1
#define KERNEL_PPID 2
#define KERNEL_UID 3
#define KERNEL_EUID 4
#define KERNEL_GID 5
#define KERNEL_EGID 6
#define KERNEL_TID 7
#define KERNEL_TID_ADDRESS 8
#define KERNEL_ROBUST_LIST 9
#define KERNEL_ROBUST_LIST_SIZE 10
#define KERNEL_MMAP_TOP 11
#endif