/* $VER: pasm elf.h V0.2 (23.03.97)
 *
 * This file is part of pasm, a portable PowerPC assembler.
 * Copyright (c) 1997-98  Frank Wille
 *
 * pasm is freeware and part of the portable and retargetable ANSI C
 * compiler vbcc, copyright (c) 1995-98 by Volker Barthelmann.
 * pasm may be freely redistributed as long as no modifications are
 * made and nothing is charged for it. Non-commercial usage is allowed
 * without any restrictions.
 * EVERY PRODUCT OR PROGRAM DERIVED DIRECTLY FROM MY SOURCE MAY NOT BE
 * SOLD COMMERCIALLY WITHOUT PERMISSION FROM THE AUTHOR.
 *
 *
 * v0.2 (25.03.97) phx
 *      Writes ELF object for 32-bit PowerPC big-endian. Either absolute
 *      or ELF output format may be selected. ELF is default for all
 *      currently supported platforms. PPCasm supports nine different
 *      relocation types (there are much more...).
 *      Compiles and works also under NetBSD/amiga (68k).
 *      Changed function declaration to 'new style' in all sources
 *      (to avoid problems with '...' for example).
 *      File created.
 */


#define EI_NIDENT 16

struct Elf32_Ehdr {
  unsigned char e_ident[EI_NIDENT];
  uint16 e_type;
  uint16 e_machine;
  uint32 e_version;
  uint32 e_entry;
  uint32 e_phoff;
  uint32 e_shoff;
  uint32 e_flags;
  uint16 e_ehsize;
  uint16 e_phentsize;
  uint16 e_phnum;
  uint16 e_shentsize;
  uint16 e_shnum;
  uint16 e_shstrndx;
};

/* e_indent indexes */
#define EI_MAG0 0
#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_PAD 7

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

/* EI_DATA */
#define ELFDATANONE 0
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2

/* e_type */
#define ET_NONE 0
#define ET_REL 1
#define ET_EXEC 2
#define ET_DYN 3
#define ET_CORE 4

/* e_version */
#define EV_NONE 0
#define EV_CURRENT 1

/* e_machine */
#define EM_NONE 0
#define EM_M32 1
#define EM_SPARC 2
#define EM_386 3
#define EM_68K 4
#define EM_88K 5
#define EM_860 7
#define EM_MIPS 8
#define EM_POWERPC 20


struct Elf32_Shdr {
  uint32 sh_name;
  uint32 sh_type;
  uint32 sh_flags;
  uint32 sh_addr;
  uint32 sh_offset;
  uint32 sh_size;
  uint32 sh_link;
  uint32 sh_info;
  uint32 sh_addralign;
  uint32 sh_entsize;
};

/* special sections indexes */
#define SHN_UNDEF 0
#define SHN_ABS 0xfff1
#define SHN_COMMON 0xfff2

/* sh_type */
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11

/* sh_flags */
#define SHF_WRITE 0x1
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4


struct Elf32_Sym {
  uint32 st_name;
  uint32 st_value;
  uint32 st_size;
  uint8 st_info;
  uint8 st_other;
  uint16 st_shndx;
};

/* st_info */
#define ELF32_ST_BIND(i) ((i)>>4)
#define ELF32_ST_TYPE(i) ((i)&0xf)
#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))

/* ST_BIND */
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2

/* ST_TYPE */
#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4


struct Elf32_Rel {
  uint32 r_offset;
  uint32 r_info;
};

struct Elf32_Rela {
  uint32 r_offset;
  uint32 r_info;
  uint32 r_addend;
};

/* 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))