Home | History | Annotate | Line # | Download | only in aout2hux 
      1 /*
      2  *	m68k a.out / ELF file structure definitions
      3  *
      4  *	written by ITOH Yasufumi
      5  *	public domain
      6  *
      7  *	$NetBSD: aout68k.h,v 1.4 2011/02/21 02:31:58 itohy Exp $
      8  */
      9 /*
     10  * NetBSD/m68k a.out format (OMAGIC, NMAGIC)
     11  *
     12  *	----------------------------
     13  *	|  file header (32 bytes)  |
     14  *	|--------------------------|
     15  *	|  text                    |
     16  *	|--------------------------|
     17  *	|  data                    |
     18  *	|--------------------------|
     19  *	|  text relocation table   |
     20  *	|--------------------------|
     21  *	|  data relocation table   |
     22  *	|--------------------------|
     23  *	|  symbol table            |
     24  *	|--------------------------|
     25  *	|  string table            |
     26  *	----------------------------
     27  *
     28  * OMAGIC: text and data segments are loaded contiguous
     29  * NMAGIC: data segment is loaded at the next page of the text
     30  */
     31 
     32 struct aout_m68k {
     33 	be_uint32_t	a_magic;	/* encoded magic number */
     34 	be_uint32_t	a_text;		/* size of text section */
     35 	be_uint32_t	a_data;		/* size of data section */
     36 	be_uint32_t	a_bss;		/* size of bss */
     37 	be_uint32_t	a_syms;		/* size of symbol table */
     38 	be_uint32_t	a_entry;	/* entry point address */
     39 	be_uint32_t	a_trsize;	/* size of text relocation */
     40 	be_uint32_t	a_drsize;	/* size of data relocation */
     41 };
     42 
     43 #define AOUT_GET_MAGIC(e)	(((e)->a_magic.val[2]<<8) | (e)->a_magic.val[3])
     44 #define	AOUT_OMAGIC	0407
     45 #define	AOUT_NMAGIC	0410
     46 #define	AOUT_ZMAGIC	0413	/* demand paging --- header is in the text */
     47 
     48 #define AOUT_GET_FLAGS(e)	((e)->a_magic.val[0] >> 2)
     49 #define AOUT_FLAG_PIC		0x10
     50 #define AOUT_FLAG_DYNAMIC	0x20
     51 
     52 /* machine ID */
     53 #define AOUT_GET_MID(e)		((((e)->a_magic.val[0] & 0x03) << 8) |	\
     54 					(e)->a_magic.val[1])
     55 #define	AOUT_MID_M68K	135	/* m68k BSD binary, 8KB page */
     56 #define	AOUT_MID_M68K4K	136	/* m68k BSD binary, 4KB page */
     57 
     58 #define AOUT_PAGESIZE(e)	(AOUT_GET_MAGIC(e) == AOUT_OMAGIC ? 1 :	\
     59 				AOUT_GET_MID(e) == AOUT_MID_M68K ? 8192 : 4096)
     60 
     61 /*
     62  * m68k ELF executable format
     63  *
     64  *	--------------------------------------
     65  *	|  ELF header     (52 bytes)         |
     66  *	|------------------------------------|
     67  *	|  Program header (32bytes x 1 or 2) |
     68  *	|------------------------------------|
     69  *	|  section 1 (text)                  |
     70  *	|------------------------------------|
     71  *	|  section 2 (data)                  |
     72  *	|------------------------------------|
     73  *	|  ...                               |
     74  *	|------------------------------------|
     75  *	|  section header table (optional)   |
     76  *	--------------------------------------
     77  */
     78 
     79 /*
     80  * ELF header for m68k
     81  */
     82 struct elf_m68k_hdr {
     83 #define EI_MAG0		0
     84 #define EI_MAG1		1
     85 #define EI_MAG2		2
     86 #define EI_MAG3		3
     87 #define EI_CLASS	4
     88 #define EI_DATA		5
     89 #define EI_VERSION	6
     90 #define EL_NIDENT	16
     91 	u_int8_t	e_ident[EL_NIDENT];	/* ELF magic */
     92 #define ELFMAG0		0x7f
     93 #define ELFMAG1		0x45	/* 'E' */
     94 #define ELFMAG2		0x4c	/* 'L' */
     95 #define ELFMAG3		0x46	/* 'F' */
     96 #define ELFCLASS32	1	/* 32bit */
     97 #define ELFDATA2MSB	2	/* big endian */
     98 	be_uint16_t	e_type;		/* type of this file */
     99 #define ET_EXEC		2
    100 	be_uint16_t	e_machine;	/* architecture id */
    101 #define EM_68K		4
    102 	be_uint32_t	e_version;
    103 #define EV_CURRENT	1
    104 	be_uint32_t	e_entry;	/* entry address */
    105 	be_uint32_t	e_phoff;	/* program header address */
    106 	be_uint32_t	e_shoff;
    107 	be_uint32_t	e_flags;
    108 	be_uint16_t	e_ehsize;
    109 	be_uint16_t	e_phentsize;	/* program header entry size */
    110 	be_uint16_t	e_phnum;	/* number of program header entries */
    111 	be_uint16_t	e_shentsize;	/* section header entry size */
    112 	be_uint16_t	e_shnum;	/* number of section header entries */
    113 	be_uint16_t	e_shstrndx;
    114 };
    115 
    116 #define SIZE_ELF68K_HDR		(sizeof(struct elf_m68k_hdr))
    117 
    118 /*
    119  * Section header for m68k ELF
    120  */
    121 struct elf_m68k_shdr {
    122 	be_uint32_t	sh_name;
    123 	be_uint32_t	sh_type;
    124 #define SHT_PROGBITS	1
    125 	be_uint32_t	sh_flags;
    126 #define SHF_WRITE	1
    127 #define SHF_ALLOC	2
    128 #define SHF_EXECINSTR	4
    129 	be_uint32_t	sh_addr;
    130 	be_uint32_t	sh_offset;
    131 	be_uint32_t	sh_size;
    132 	be_uint32_t	sh_link;
    133 	be_uint32_t	sh_info;
    134 	be_uint32_t	sh_addralign;
    135 	be_uint32_t	sh_entsize;
    136 };
    137 
    138 #define ELF68K_ISDATASEG(sh)	\
    139 	(get_uint32(&(sh)->sh_type) == SHT_PROGBITS &&		\
    140 	 (get_uint32(&(sh)->sh_flags) &				\
    141 		(SHF_WRITE | SHF_ALLOC | SHF_EXECINSTR)) ==	\
    142 			(SHF_WRITE | SHF_ALLOC))	/* no SHF_EXECINSTR */
    143 
    144 #define SIZE_ELF68K_SHDR	(sizeof(struct elf_m68k_shdr))
    145 
    146 /*
    147  * Program header for m68k ELF
    148  */
    149 struct elf_m68k_phdr {
    150 	be_uint32_t	p_type;		/* type of segment */
    151 #define PT_LOAD		1
    152 	be_uint32_t	p_offset;	/* file offset */
    153 	be_uint32_t	p_vaddr;	/* virtual address */
    154 	be_uint32_t	p_paddr;	/* physical address (ignored) */
    155 	be_uint32_t	p_filesz;	/* size on file */
    156 	be_uint32_t	p_memsz;	/* size on memory */
    157 	be_uint32_t	p_flags;
    158 #define PF_R		4
    159 #define PF_W		2
    160 #define PF_X		1
    161 	be_uint32_t	p_align;
    162 };
    163 
    164 #define SIZE_ELF68K_PHDR	(sizeof(struct elf_m68k_phdr))
    165