elf.h

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#ifndef _PPC_BOOT_ELF_H_
#define _PPC_BOOT_ELF_H_

/* 32-bit ELF base types. */
typedef unsigned int Elf32_Addr;
typedef unsigned short Elf32_Half;
typedef unsigned int Elf32_Off;
typedef signed int Elf32_Sword;
typedef unsigned int Elf32_Word;

/* 64-bit ELF base types. */
typedef unsigned long long Elf64_Addr;
typedef unsigned short Elf64_Half;
typedef signed short Elf64_SHalf;
typedef unsigned long long Elf64_Off;
typedef signed int Elf64_Sword;
typedef unsigned int Elf64_Word;
typedef unsigned long long Elf64_Xword;
typedef signed long long Elf64_Sxword;

/* These constants are for the segment types stored in the image headers */
#define PT_NULL    0
#define PT_LOAD    1
#define PT_DYNAMIC 2
#define PT_INTERP  3
#define PT_NOTE    4
#define PT_SHLIB   5
#define PT_PHDR    6
#define PT_TLS     7        /* Thread local storage segment */
#define PT_LOOS    0x60000000   /* OS-specific */
#define PT_HIOS    0x6fffffff   /* OS-specific */
#define PT_LOPROC  0x70000000
#define PT_HIPROC  0x7fffffff
#define PT_GNU_EH_FRAME     0x6474e550

#define PT_GNU_STACK    (PT_LOOS + 0x474e551)

/* These constants define the different elf file types */
#define ET_NONE   0
#define ET_REL    1
#define ET_EXEC   2
#define ET_DYN    3
#define ET_CORE   4
#define ET_LOPROC 0xff00
#define ET_HIPROC 0xffff

/* These constants define the various ELF target machines */
#define EM_NONE  0
#define EM_PPC         20   /* PowerPC */
#define EM_PPC64       21   /* PowerPC64 */

#define EI_NIDENT   16

typedef struct elf32_hdr {
    unsigned char e_ident[EI_NIDENT];
    Elf32_Half e_type;
    Elf32_Half e_machine;
    Elf32_Word e_version;
    Elf32_Addr e_entry; /* Entry point */
    Elf32_Off e_phoff;
    Elf32_Off e_shoff;
    Elf32_Word e_flags;
    Elf32_Half e_ehsize;
    Elf32_Half e_phentsize;
    Elf32_Half e_phnum;
    Elf32_Half e_shentsize;
    Elf32_Half e_shnum;
    Elf32_Half e_shstrndx;
} Elf32_Ehdr;

typedef struct elf64_hdr {
    unsigned char e_ident[16];  /* ELF "magic number" */
    Elf64_Half e_type;
    Elf64_Half e_machine;
    Elf64_Word e_version;
    Elf64_Addr e_entry; /* Entry point virtual address */
    Elf64_Off e_phoff;  /* Program header table file offset */
    Elf64_Off e_shoff;  /* Section header table file offset */
    Elf64_Word e_flags;
    Elf64_Half e_ehsize;
    Elf64_Half e_phentsize;
    Elf64_Half e_phnum;
    Elf64_Half e_shentsize;
    Elf64_Half e_shnum;
    Elf64_Half e_shstrndx;
} Elf64_Ehdr;

/* These constants define the permissions on sections in the program
   header, p_flags. */
#define PF_R        0x4
#define PF_W        0x2
#define PF_X        0x1

typedef struct elf32_phdr {
    Elf32_Word p_type;
    Elf32_Off p_offset;
    Elf32_Addr p_vaddr;
    Elf32_Addr p_paddr;
    Elf32_Word p_filesz;
    Elf32_Word p_memsz;
    Elf32_Word p_flags;
    Elf32_Word p_align;
} Elf32_Phdr;

typedef struct elf64_phdr {
    Elf64_Word p_type;
    Elf64_Word p_flags;
    Elf64_Off p_offset; /* Segment file offset */
    Elf64_Addr p_vaddr; /* Segment virtual address */
    Elf64_Addr p_paddr; /* Segment physical address */
    Elf64_Xword p_filesz;   /* Segment size in file */
    Elf64_Xword p_memsz;    /* Segment size in memory */
    Elf64_Xword p_align;    /* Segment alignment, file & memory */
} Elf64_Phdr;

#define EI_MAG0     0   /* e_ident[] indexes */
#define EI_MAG1     1
#define EI_MAG2     2
#define EI_MAG3     3
#define EI_CLASS    4
#define EI_DATA     5
#define EI_VERSION  6
#define EI_OSABI    7
#define EI_PAD      8

#define ELFMAG0     0x7f    /* EI_MAG */
#define ELFMAG1     'E'
#define ELFMAG2     'L'
#define ELFMAG3     'F'
#define ELFMAG      "\177ELF"
#define SELFMAG     4

#define ELFCLASSNONE    0   /* EI_CLASS */
#define ELFCLASS32  1
#define ELFCLASS64  2
#define ELFCLASSNUM 3

#define ELFDATANONE 0   /* e_ident[EI_DATA] */
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2

#define EV_NONE     0   /* e_version, EI_VERSION */
#define EV_CURRENT  1
#define EV_NUM      2

#define ELFOSABI_NONE   0
#define ELFOSABI_LINUX  3

struct elf_info {
    unsigned long loadsize;
    unsigned long memsize;
    unsigned long elfoffset;
};
int parse_elf64(void *hdr, struct elf_info *info);
int parse_elf32(void *hdr, struct elf_info *info);

#endif              /* _PPC_BOOT_ELF_H_ */