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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [include/] [aout/] [adobe.h] - Blame information for rev 24

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/* `a.out.adobe' differences from standard a.out files
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   Copyright 2001, 2010 Free Software Foundation, Inc.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#ifndef __A_OUT_ADOBE_H__
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#define __A_OUT_ADOBE_H__
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#define BYTES_IN_WORD   4
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/* Struct external_exec is the same.  */
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/* This is the layout on disk of the 32-bit or 64-bit exec header. */
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struct external_exec
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{
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  bfd_byte e_info[4];           /* magic number and stuff               */
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  bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes    */
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  bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes    */
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  bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes         */
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  bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes    */
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  bfd_byte e_entry[BYTES_IN_WORD]; /* start address                     */
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  bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info   */
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  bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info   */
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};
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#define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
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/* Magic numbers for a.out files */
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#undef  ZMAGIC
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#define ZMAGIC  0xAD0BE         /* Cute, eh?  */
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#undef  OMAGIC
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#undef  NMAGIC
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#define N_BADMAG(x)       ((x).a_info != ZMAGIC)
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/* By default, segment size is constant.  But some machines override this
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   to be a function of the a.out header (e.g. machine type).  */
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#ifndef N_SEGSIZE
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#define N_SEGSIZE(x)    SEGMENT_SIZE
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#endif
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#undef N_SEGSIZE   /* FIXMEXXXX */
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/* Segment information for the a.out.Adobe format is specified after the
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   file header.  It contains N segment descriptors, followed by one with
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   a type of zero.
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   The actual text of the segments starts at N_TXTOFF in the file,
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   regardless of how many or how few segment headers there are.  */
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struct external_segdesc {
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        unsigned char e_type[1];
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        unsigned char e_size[3];
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        unsigned char e_virtbase[4];
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        unsigned char e_filebase[4];
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};
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struct internal_segdesc {
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        unsigned int    a_type:8;       /* Segment type N_TEXT, N_DATA, 0 */
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        unsigned int    a_size:24;      /* Segment size */
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        bfd_vma         a_virtbase;     /* Virtual address */
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        unsigned int    a_filebase;     /* Base address in object file */
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};
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#define N_TXTADDR(x) \
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/* This is documented to be at 1024, but appears to really be at 2048.
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   FIXME?!  */
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#define N_TXTOFF(x)     2048
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#define N_TXTSIZE(x) ((x).a_text)
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#define N_DATADDR(x)
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#define N_BSSADDR(x)
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/* Offsets of the various portions of the file after the text segment.  */
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#define N_DATOFF(x)     ( N_TXTOFF(x) + N_TXTSIZE(x) )
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#define N_TRELOFF(x)    ( N_DATOFF(x) + (x).a_data )
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#define N_DRELOFF(x)    ( N_TRELOFF(x) + (x).a_trsize )
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#define N_SYMOFF(x)     ( N_DRELOFF(x) + (x).a_drsize )
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#define N_STROFF(x)     ( N_SYMOFF(x) + (x).a_syms )
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/* Symbols */
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struct external_nlist {
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  bfd_byte e_strx[BYTES_IN_WORD];       /* index into string table of name */
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  bfd_byte e_type[1];                   /* type of symbol */
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  bfd_byte e_other[1];                  /* misc info (usually empty) */
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  bfd_byte e_desc[2];                   /* description field */
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  bfd_byte e_value[BYTES_IN_WORD];      /* value of symbol */
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};
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#define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
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struct internal_nlist {
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  unsigned long n_strx;                 /* index into string table of name */
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  unsigned char n_type;                 /* type of symbol */
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  unsigned char n_other;                /* misc info (usually empty) */
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  unsigned short n_desc;                /* description field */
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  bfd_vma n_value;                      /* value of symbol */
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};
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/* The n_type field is the symbol type, containing:  */
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#define N_UNDF  0        /* Undefined symbol */
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#define N_ABS   2       /* Absolute symbol -- defined at particular addr */
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#define N_TEXT  4       /* Text sym -- defined at offset in text seg */
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#define N_DATA  6       /* Data sym -- defined at offset in data seg */
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#define N_BSS   8       /* BSS  sym -- defined at offset in zero'd seg */
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#define N_COMM  0x12    /* Common symbol (visible after shared lib dynlink) */
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#define N_FN    0x1f    /* File name of .o file */
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#define N_FN_SEQ 0x0C   /* N_FN from Sequent compilers (sigh) */
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/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
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   N_DATA, or N_BSS.  When the low-order bit of other types is set,
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   (e.g. N_WARNING versus N_FN), they are two different types.  */
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#define N_EXT   1       /* External symbol (as opposed to local-to-this-file) */
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#define N_TYPE  0x1e
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#define N_STAB  0xe0    /* If any of these bits are on, it's a debug symbol */
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#define N_INDR 0x0a
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/* The following symbols refer to set elements.
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   All the N_SET[ATDB] symbols with the same name form one set.
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   Space is allocated for the set in the text section, and each set
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   elements value is stored into one word of the space.
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   The first word of the space is the length of the set (number of elements).
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   The address of the set is made into an N_SETV symbol
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   whose name is the same as the name of the set.
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   This symbol acts like a N_DATA global symbol
147
   in that it can satisfy undefined external references.  */
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149
/* These appear as input to LD, in a .o file.  */
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#define N_SETA  0x14            /* Absolute set element symbol */
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#define N_SETT  0x16            /* Text set element symbol */
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#define N_SETD  0x18            /* Data set element symbol */
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#define N_SETB  0x1A            /* Bss set element symbol */
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/* This is output from LD.  */
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#define N_SETV  0x1C            /* Pointer to set vector in data area.  */
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/* Warning symbol. The text gives a warning message, the next symbol
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   in the table will be undefined. When the symbol is referenced, the
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   message is printed.  */
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#define N_WARNING 0x1e
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/* Relocations
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  There are two types of relocation flavours for a.out systems,
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  standard and extended. The standard form is used on systems where the
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  instruction has room for all the bits of an offset to the operand, whilst
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  the extended form is used when an address operand has to be split over n
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  instructions. Eg, on the 68k, each move instruction can reference
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  the target with a displacement of 16 or 32 bits. On the sparc, move
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  instructions use an offset of 14 bits, so the offset is stored in
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  the reloc field, and the data in the section is ignored.
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*/
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/* This structure describes a single relocation to be performed.
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   The text-relocation section of the file is a vector of these structures,
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   all of which apply to the text section.
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   Likewise, the data-relocation section applies to the data section.  */
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181
struct reloc_std_external {
182
  bfd_byte r_address[BYTES_IN_WORD];    /* offset of of data to relocate */
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  bfd_byte r_index[3];  /* symbol table index of symbol         */
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  bfd_byte r_type[1];   /* relocation type                      */
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};
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#define RELOC_STD_BITS_PCREL_BIG        0x80
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#define RELOC_STD_BITS_PCREL_LITTLE     0x01
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#define RELOC_STD_BITS_LENGTH_BIG       0x60
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#define RELOC_STD_BITS_LENGTH_SH_BIG    5       /* To shift to units place */
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#define RELOC_STD_BITS_LENGTH_LITTLE    0x06
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#define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
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#define RELOC_STD_BITS_EXTERN_BIG       0x10
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#define RELOC_STD_BITS_EXTERN_LITTLE    0x08
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#define RELOC_STD_BITS_BASEREL_BIG      0x08
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#define RELOC_STD_BITS_BASEREL_LITTLE   0x08
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#define RELOC_STD_BITS_JMPTABLE_BIG     0x04
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#define RELOC_STD_BITS_JMPTABLE_LITTLE  0x04
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#define RELOC_STD_BITS_RELATIVE_BIG     0x02
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#define RELOC_STD_BITS_RELATIVE_LITTLE  0x02
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#define RELOC_STD_SIZE  (BYTES_IN_WORD + 3 + 1)         /* Bytes per relocation entry */
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struct reloc_std_internal
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{
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  bfd_vma r_address;            /* Address (within segment) to be relocated.  */
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  /* The meaning of r_symbolnum depends on r_extern.  */
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  unsigned int r_symbolnum:24;
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  /* Nonzero means value is a pc-relative offset
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     and it should be relocated for changes in its own address
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     as well as for changes in the symbol or section specified.  */
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  unsigned int r_pcrel:1;
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  /* Length (as exponent of 2) of the field to be relocated.
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     Thus, a value of 2 indicates 1<<2 bytes.  */
220
  unsigned int r_length:2;
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  /* 1 => relocate with value of symbol.
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     r_symbolnum is the index of the symbol
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     in files the symbol table.
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     r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
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     (the N_EXT bit may be set also, but signifies nothing).  */
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  unsigned int r_extern:1;
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  /* The next three bits are for SunOS shared libraries, and seem to
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     be undocumented.  */
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  unsigned int r_baserel:1;     /* Linkage table relative */
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  unsigned int r_jmptable:1;    /* pc-relative to jump table */
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  unsigned int r_relative:1;    /* "relative relocation" */
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  /* unused */
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  unsigned int r_pad:1;         /* Padding -- set to zero */
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};
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238
/* EXTENDED RELOCS  */
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240
struct reloc_ext_external {
241
  bfd_byte r_address[BYTES_IN_WORD];    /* offset of of data to relocate        */
242
  bfd_byte r_index[3];  /* symbol table index of symbol         */
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  bfd_byte r_type[1];   /* relocation type                      */
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  bfd_byte r_addend[BYTES_IN_WORD];     /* datum addend                         */
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};
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#define RELOC_EXT_BITS_EXTERN_BIG       0x80
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#define RELOC_EXT_BITS_EXTERN_LITTLE    0x01
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250
#define RELOC_EXT_BITS_TYPE_BIG         0x1F
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#define RELOC_EXT_BITS_TYPE_SH_BIG      0
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#define RELOC_EXT_BITS_TYPE_LITTLE      0xF8
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#define RELOC_EXT_BITS_TYPE_SH_LITTLE   3
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255
/* Bytes per relocation entry */
256
#define RELOC_EXT_SIZE  (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
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258
enum reloc_type
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{
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  /* simple relocations */
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  RELOC_8,                      /* data[0:7] = addend + sv              */
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  RELOC_16,                     /* data[0:15] = addend + sv             */
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  RELOC_32,                     /* data[0:31] = addend + sv             */
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  /* pc-rel displacement */
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  RELOC_DISP8,                  /* data[0:7] = addend - pc + sv         */
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  RELOC_DISP16,                 /* data[0:15] = addend - pc + sv        */
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  RELOC_DISP32,                 /* data[0:31] = addend - pc + sv        */
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  /* Special */
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  RELOC_WDISP30,                /* data[0:29] = (addend + sv - pc)>>2   */
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  RELOC_WDISP22,                /* data[0:21] = (addend + sv - pc)>>2   */
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  RELOC_HI22,                   /* data[0:21] = (addend + sv)>>10       */
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  RELOC_22,                     /* data[0:21] = (addend + sv)           */
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  RELOC_13,                     /* data[0:12] = (addend + sv)           */
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  RELOC_LO10,                   /* data[0:9] = (addend + sv)            */
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  RELOC_SFA_BASE,
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  RELOC_SFA_OFF13,
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  /* P.I.C. (base-relative) */
278
  RELOC_BASE10,                 /* Not sure - maybe we can do this the */
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  RELOC_BASE13,                 /* right way now */
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  RELOC_BASE22,
281
  /* for some sort of pc-rel P.I.C. (?) */
282
  RELOC_PC10,
283
  RELOC_PC22,
284
  /* P.I.C. jump table */
285
  RELOC_JMP_TBL,
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  /* reputedly for shared libraries somehow */
287
  RELOC_SEGOFF16,
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  RELOC_GLOB_DAT,
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  RELOC_JMP_SLOT,
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  RELOC_RELATIVE,
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  RELOC_11,
293
  RELOC_WDISP2_14,
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  RELOC_WDISP19,
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  RELOC_HHI22,                  /* data[0:21] = (addend + sv) >> 42     */
296
  RELOC_HLO10,                  /* data[0:9] = (addend + sv) >> 32      */
297
 
298
  /* 29K relocation types */
299
  RELOC_JUMPTARG,
300
  RELOC_CONST,
301
  RELOC_CONSTH,
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303
  NO_RELOC
304
  };
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struct reloc_internal {
308
  bfd_vma r_address;            /* offset of of data to relocate        */
309
  long  r_index;                /* symbol table index of symbol         */
310
  enum reloc_type r_type;       /* relocation type                      */
311
  bfd_vma r_addend;             /* datum addend                         */
312
};
313
 
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#endif                          /* __A_OUT_ADOBE_H__ */

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