| 1 | /* `a.out' object-file definitions, including extensions to 64-bit fields
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| 2 |
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| 3 | Copyright 2001, 2003 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 2 of the License, or
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| 8 | (at your option) any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program; if not, write to the Free Software
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| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 18 |
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| 19 | #ifndef __A_OUT_64_H__
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| 20 | #define __A_OUT_64_H__
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| 21 |
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| 22 | #ifndef BYTES_IN_WORD
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| 23 | #define BYTES_IN_WORD 4
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| 24 | #endif
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| 25 |
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| 26 | /* This is the layout on disk of the 32-bit or 64-bit exec header. */
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| 27 |
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| 28 | #ifndef external_exec
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| 29 | struct external_exec
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| 30 | {
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| 31 | bfd_byte e_info[4]; /* Magic number and stuff. */
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| 32 | bfd_byte e_text[BYTES_IN_WORD]; /* Length of text section in bytes. */
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| 33 | bfd_byte e_data[BYTES_IN_WORD]; /* Length of data section in bytes. */
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| 34 | bfd_byte e_bss[BYTES_IN_WORD]; /* Length of bss area in bytes. */
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| 35 | bfd_byte e_syms[BYTES_IN_WORD]; /* Length of symbol table in bytes. */
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| 36 | bfd_byte e_entry[BYTES_IN_WORD]; /* Start address. */
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| 37 | bfd_byte e_trsize[BYTES_IN_WORD]; /* Length of text relocation info. */
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| 38 | bfd_byte e_drsize[BYTES_IN_WORD]; /* Length of data relocation info. */
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| 39 | };
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| 40 |
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| 41 | #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
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| 42 |
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| 43 | /* Magic numbers for a.out files. */
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| 44 |
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| 45 | #if ARCH_SIZE==64
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| 46 | #define OMAGIC 0x1001 /* Code indicating object file. */
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| 47 | #define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
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| 48 | #define NMAGIC 0x1003 /* Code indicating pure executable. */
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| 49 |
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| 50 | /* There is no 64-bit QMAGIC as far as I know. */
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| 51 |
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| 52 | #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
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| 53 | && N_MAGIC(x) != NMAGIC \
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| 54 | && N_MAGIC(x) != ZMAGIC)
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| 55 | #else
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| 56 | #define OMAGIC 0407 /* Object file or impure executable. */
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| 57 | #define NMAGIC 0410 /* Code indicating pure executable. */
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| 58 | #define ZMAGIC 0413 /* Code indicating demand-paged executable. */
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| 59 | #define BMAGIC 0415 /* Used by a b.out object. */
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| 60 |
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| 61 | /* This indicates a demand-paged executable with the header in the text.
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| 62 | It is used by 386BSD (and variants) and Linux, at least. */
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| 63 | #ifndef QMAGIC
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| 64 | #define QMAGIC 0314
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| 65 | #endif
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| 66 | # ifndef N_BADMAG
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| 67 | # define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
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| 68 | && N_MAGIC(x) != NMAGIC \
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| 69 | && N_MAGIC(x) != ZMAGIC \
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| 70 | && N_MAGIC(x) != QMAGIC)
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| 71 | # endif /* N_BADMAG */
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| 72 | #endif
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| 73 |
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| 74 | #endif
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| 75 |
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| 76 | #ifdef QMAGIC
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| 77 | #define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC)
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| 78 | #else
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| 79 | #define N_IS_QMAGIC(x) (0)
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| 80 | #endif
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| 81 |
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| 82 | /* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is
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| 83 | the finest granularity at which you can page something, thus it
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| 84 | controls the padding (if any) before the text segment of a ZMAGIC
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| 85 | file. N_SEGSIZE is the resolution at which things can be marked as
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| 86 | read-only versus read/write, so it controls the padding between the
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| 87 | text segment and the data segment (in memory; on disk the padding
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| 88 | between them is TARGET_PAGE_SIZE). TARGET_PAGE_SIZE and N_SEGSIZE are the same
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| 89 | for most machines, but different for sun3. */
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| 90 |
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| 91 | /* By default, segment size is constant. But some machines override this
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| 92 | to be a function of the a.out header (e.g. machine type). */
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| 93 |
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| 94 | #ifndef N_SEGSIZE
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| 95 | #define N_SEGSIZE(x) SEGMENT_SIZE
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| 96 | #endif
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| 97 | |
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| 98 |
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| 99 | /* Virtual memory address of the text section.
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| 100 | This is getting very complicated. A good reason to discard a.out format
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| 101 | for something that specifies these fields explicitly. But til then...
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| 102 |
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| 103 | * OMAGIC and NMAGIC files:
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| 104 | (object files: text for "relocatable addr 0" right after the header)
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| 105 | start at 0, offset is EXEC_BYTES_SIZE, size as stated.
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| 106 | * The text address, offset, and size of ZMAGIC files depend
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| 107 | on the entry point of the file:
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| 108 | * entry point below TEXT_START_ADDR:
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| 109 | (hack for SunOS shared libraries)
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| 110 | start at 0, offset is 0, size as stated.
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| 111 | * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
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| 112 | case when the entry point is EXEC_BYTES_SIZE or further into a page):
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| 113 | no padding is needed; text can start after exec header. Sun
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| 114 | considers the text segment of such files to include the exec header;
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| 115 | for BFD's purposes, we don't, which makes more work for us.
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| 116 | start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
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| 117 | size as stated minus EXEC_BYTES_SIZE.
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| 118 | * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
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| 119 | the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
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| 120 | aligned)): (padding is needed so that text can start at a page boundary)
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| 121 | start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated.
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| 122 |
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| 123 | Specific configurations may want to hardwire N_HEADER_IN_TEXT,
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| 124 | for efficiency or to allow people to play games with the entry point.
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| 125 | In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
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| 126 | and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
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| 127 | (Do this in the appropriate bfd target file.)
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| 128 | (The default is a heuristic that will break if people try changing
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| 129 | the entry point, perhaps with the ld -e flag.)
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| 130 |
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| 131 | * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true,
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| 132 | and for which the starting address is TARGET_PAGE_SIZE (or should this be
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| 133 | SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC). */
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| 134 |
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| 135 | /* This macro is only relevant for ZMAGIC files; QMAGIC always has the header
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| 136 | in the text. */
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| 137 | #ifndef N_HEADER_IN_TEXT
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| 138 | #define N_HEADER_IN_TEXT(x) \
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| 139 | (((x).a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
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| 140 | #endif
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| 141 |
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| 142 | /* Sun shared libraries, not linux. This macro is only relevant for ZMAGIC
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| 143 | files. */
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| 144 | #ifndef N_SHARED_LIB
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| 145 | #if defined (TEXT_START_ADDR) && TEXT_START_ADDR == 0
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| 146 | #define N_SHARED_LIB(x) (0)
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| 147 | #else
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| 148 | #define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR)
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| 149 | #endif
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| 150 | #endif
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| 151 |
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| 152 | /* Returning 0 not TEXT_START_ADDR for OMAGIC and NMAGIC is based on
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| 153 | the assumption that we are dealing with a .o file, not an
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| 154 | executable. This is necessary for OMAGIC (but means we don't work
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| 155 | right on the output from ld -N); more questionable for NMAGIC. */
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| 156 |
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| 157 | #ifndef N_TXTADDR
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| 158 | #define N_TXTADDR(x) \
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| 159 | (/* The address of a QMAGIC file is always one page in, \
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| 160 | with the header in the text. */ \
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| 161 | N_IS_QMAGIC (x) \
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| 162 | ? (bfd_vma) TARGET_PAGE_SIZE + EXEC_BYTES_SIZE \
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| 163 | : (N_MAGIC (x) != ZMAGIC \
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| 164 | ? (bfd_vma) 0 /* Object file or NMAGIC. */ \
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| 165 | : (N_SHARED_LIB (x) \
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| 166 | ? (bfd_vma) 0 \
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| 167 | : (N_HEADER_IN_TEXT (x) \
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| 168 | ? (bfd_vma) TEXT_START_ADDR + EXEC_BYTES_SIZE \
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| 169 | : (bfd_vma) TEXT_START_ADDR))))
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| 170 | #endif
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| 171 |
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| 172 | /* If N_HEADER_IN_TEXT is not true for ZMAGIC, there is some padding
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| 173 | to make the text segment start at a certain boundary. For most
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| 174 | systems, this boundary is TARGET_PAGE_SIZE. But for Linux, in the
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| 175 | time-honored tradition of crazy ZMAGIC hacks, it is 1024 which is
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| 176 | not what TARGET_PAGE_SIZE needs to be for QMAGIC. */
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| 177 |
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| 178 | #ifndef ZMAGIC_DISK_BLOCK_SIZE
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| 179 | #define ZMAGIC_DISK_BLOCK_SIZE TARGET_PAGE_SIZE
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| 180 | #endif
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| 181 |
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| 182 | #define N_DISK_BLOCK_SIZE(x) \
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| 183 | (N_MAGIC(x) == ZMAGIC ? ZMAGIC_DISK_BLOCK_SIZE : TARGET_PAGE_SIZE)
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| 184 |
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| 185 | /* Offset in an a.out of the start of the text section. */
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| 186 | #ifndef N_TXTOFF
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| 187 | #define N_TXTOFF(x) \
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| 188 | (/* For {O,N,Q}MAGIC, no padding. */ \
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| 189 | N_MAGIC (x) != ZMAGIC \
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| 190 | ? EXEC_BYTES_SIZE \
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| 191 | : (N_SHARED_LIB (x) \
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| 192 | ? 0 \
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| 193 | : (N_HEADER_IN_TEXT (x) \
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| 194 | ? EXEC_BYTES_SIZE /* No padding. */ \
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| 195 | : ZMAGIC_DISK_BLOCK_SIZE /* A page of padding. */)))
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| 196 | #endif
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| 197 | /* Size of the text section. It's always as stated, except that we
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| 198 | offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF
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| 199 | for ZMAGIC files that nominally include the exec header
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| 200 | as part of the first page of text. (BFD doesn't consider the
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| 201 | exec header to be part of the text segment.) */
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| 202 | #ifndef N_TXTSIZE
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| 203 | #define N_TXTSIZE(x) \
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| 204 | (/* For QMAGIC, we don't consider the header part of the text section. */\
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| 205 | N_IS_QMAGIC (x) \
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| 206 | ? (x).a_text - EXEC_BYTES_SIZE \
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| 207 | : ((N_MAGIC (x) != ZMAGIC || N_SHARED_LIB (x)) \
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| 208 | ? (x).a_text \
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| 209 | : (N_HEADER_IN_TEXT (x) \
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| 210 | ? (x).a_text - EXEC_BYTES_SIZE /* No padding. */ \
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| 211 | : (x).a_text /* A page of padding. */ )))
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| 212 | #endif
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| 213 | /* The address of the data segment in virtual memory.
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| 214 | It is the text segment address, plus text segment size, rounded
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| 215 | up to a N_SEGSIZE boundary for pure or pageable files. */
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| 216 | #ifndef N_DATADDR
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| 217 | #define N_DATADDR(x) \
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| 218 | (N_MAGIC (x) == OMAGIC \
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| 219 | ? (N_TXTADDR (x) + N_TXTSIZE (x)) \
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| 220 | : (N_SEGSIZE (x) + ((N_TXTADDR (x) + N_TXTSIZE (x) - 1) \
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| 221 | & ~ (bfd_vma) (N_SEGSIZE (x) - 1))))
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| 222 | #endif
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| 223 | /* The address of the BSS segment -- immediately after the data segment. */
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| 224 |
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| 225 | #define N_BSSADDR(x) (N_DATADDR (x) + (x).a_data)
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| 226 |
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| 227 | /* Offsets of the various portions of the file after the text segment. */
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| 228 |
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| 229 | /* For {Q,Z}MAGIC, there is padding to make the data segment start on
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| 230 | a page boundary. Most of the time the a_text field (and thus
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| 231 | N_TXTSIZE) already contains this padding. It is possible that for
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| 232 | BSDI and/or 386BSD it sometimes doesn't contain the padding, and
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| 233 | perhaps we should be adding it here. But this seems kind of
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| 234 | questionable and probably should be BSDI/386BSD-specific if we do
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| 235 | do it.
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| 236 |
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| 237 | For NMAGIC (at least for hp300 BSD, probably others), there is
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| 238 | padding in memory only, not on disk, so we must *not* ever pad here
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| 239 | for NMAGIC. */
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| 240 |
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| 241 | #ifndef N_DATOFF
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| 242 | #define N_DATOFF(x) (N_TXTOFF (x) + N_TXTSIZE (x))
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| 243 | #endif
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| 244 | #ifndef N_TRELOFF
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| 245 | #define N_TRELOFF(x) (N_DATOFF (x) + (x).a_data)
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| 246 | #endif
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| 247 | #ifndef N_DRELOFF
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| 248 | #define N_DRELOFF(x) (N_TRELOFF (x) + (x).a_trsize)
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| 249 | #endif
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| 250 | #ifndef N_SYMOFF
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| 251 | #define N_SYMOFF(x) (N_DRELOFF (x) + (x).a_drsize)
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| 252 | #endif
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| 253 | #ifndef N_STROFF
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| 254 | #define N_STROFF(x) (N_SYMOFF (x) + (x).a_syms)
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| 255 | #endif
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| 256 | |
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| 257 |
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| 258 | /* Symbols */
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| 259 | #ifndef external_nlist
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| 260 | struct external_nlist
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| 261 | {
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| 262 | bfd_byte e_strx[BYTES_IN_WORD]; /* Index into string table of name. */
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| 263 | bfd_byte e_type[1]; /* Type of symbol. */
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| 264 | bfd_byte e_other[1]; /* Misc info (usually empty). */
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| 265 | bfd_byte e_desc[2]; /* Description field. */
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| 266 | bfd_byte e_value[BYTES_IN_WORD]; /* Value of symbol. */
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| 267 | };
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| 268 | #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
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| 269 | #endif
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| 270 |
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| 271 | struct internal_nlist
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| 272 | {
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| 273 | unsigned long n_strx; /* Index into string table of name. */
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| 274 | unsigned char n_type; /* Type of symbol. */
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| 275 | unsigned char n_other; /* Misc info (usually empty). */
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| 276 | unsigned short n_desc; /* Description field. */
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| 277 | bfd_vma n_value; /* Value of symbol. */
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| 278 | };
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| 279 |
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| 280 | /* The n_type field is the symbol type, containing: */
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| 281 |
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| 282 | #define N_UNDF 0 /* Undefined symbol. */
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| 283 | #define N_ABS 2 /* Absolute symbol -- defined at particular addr. */
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| 284 | #define N_TEXT 4 /* Text sym -- defined at offset in text seg. */
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| 285 | #define N_DATA 6 /* Data sym -- defined at offset in data seg. */
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| 286 | #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg. */
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| 287 | #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink). */
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| 288 | #define N_FN 0x1f /* File name of .o file. */
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| 289 | #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh). */
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| 290 | /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
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| 291 | N_DATA, or N_BSS. When the low-order bit of other types is set,
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| 292 | (e.g. N_WARNING versus N_FN), they are two different types. */
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| 293 | #define N_EXT 1 /* External symbol (as opposed to local-to-this-file). */
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| 294 | #define N_TYPE 0x1e
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| 295 | #define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol. */
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| 296 |
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| 297 | #define N_INDR 0x0a
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| 298 |
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| 299 | /* The following symbols refer to set elements.
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| 300 | All the N_SET[ATDB] symbols with the same name form one set.
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| 301 | Space is allocated for the set in the text section, and each set
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| 302 | elements value is stored into one word of the space.
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| 303 | The first word of the space is the length of the set (number of elements).
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| 304 |
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| 305 | The address of the set is made into an N_SETV symbol
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| 306 | whose name is the same as the name of the set.
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| 307 | This symbol acts like a N_DATA global symbol
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| 308 | in that it can satisfy undefined external references. */
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| 309 |
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| 310 | /* These appear as input to LD, in a .o file. */
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| 311 | #define N_SETA 0x14 /* Absolute set element symbol. */
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| 312 | #define N_SETT 0x16 /* Text set element symbol. */
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| 313 | #define N_SETD 0x18 /* Data set element symbol. */
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| 314 | #define N_SETB 0x1A /* Bss set element symbol. */
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| 315 |
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| 316 | /* This is output from LD. */
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| 317 | #define N_SETV 0x1C /* Pointer to set vector in data area. */
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| 318 |
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| 319 | /* Warning symbol. The text gives a warning message, the next symbol
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| 320 | in the table will be undefined. When the symbol is referenced, the
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| 321 | message is printed. */
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| 322 |
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| 323 | #define N_WARNING 0x1e
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| 324 |
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| 325 | /* Weak symbols. These are a GNU extension to the a.out format. The
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| 326 | semantics are those of ELF weak symbols. Weak symbols are always
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| 327 | externally visible. The N_WEAK? values are squeezed into the
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| 328 | available slots. The value of a N_WEAKU symbol is 0. The values
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| 329 | of the other types are the definitions. */
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| 330 | #define N_WEAKU 0x0d /* Weak undefined symbol. */
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| 331 | #define N_WEAKA 0x0e /* Weak absolute symbol. */
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| 332 | #define N_WEAKT 0x0f /* Weak text symbol. */
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| 333 | #define N_WEAKD 0x10 /* Weak data symbol. */
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| 334 | #define N_WEAKB 0x11 /* Weak bss symbol. */
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| 335 |
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| 336 | /* emx-specific symbols. */
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| 337 | #define N_IMP1 0x68 /* Import reference (emx specific) */
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| 338 | #define N_IMP2 0x6a /* Import definition (emx specific) */
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| 339 | #define N_EXP 0x6c /* Export definition (emx specific) */
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| 340 |
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| 341 | /* Relocations
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| 342 |
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| 343 | There are two types of relocation flavours for a.out systems,
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| 344 | standard and extended. The standard form is used on systems where the
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| 345 | instruction has room for all the bits of an offset to the operand, whilst
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| 346 | the extended form is used when an address operand has to be split over n
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| 347 | instructions. Eg, on the 68k, each move instruction can reference
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| 348 | the target with a displacement of 16 or 32 bits. On the sparc, move
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| 349 | instructions use an offset of 14 bits, so the offset is stored in
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| 350 | the reloc field, and the data in the section is ignored. */
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| 351 |
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| 352 | /* This structure describes a single relocation to be performed.
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| 353 | The text-relocation section of the file is a vector of these structures,
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| 354 | all of which apply to the text section.
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| 355 | Likewise, the data-relocation section applies to the data section. */
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| 356 |
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| 357 | struct reloc_std_external
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| 358 | {
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| 359 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of of data to relocate. */
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| 360 | bfd_byte r_index[3]; /* Symbol table index of symbol. */
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| 361 | bfd_byte r_type[1]; /* Relocation type. */
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| 362 | };
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| 363 |
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| 364 | #define RELOC_STD_BITS_PCREL_BIG ((unsigned int) 0x80)
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| 365 | #define RELOC_STD_BITS_PCREL_LITTLE ((unsigned int) 0x01)
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| 366 |
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| 367 | #define RELOC_STD_BITS_LENGTH_BIG ((unsigned int) 0x60)
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| 368 | #define RELOC_STD_BITS_LENGTH_SH_BIG 5
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| 369 | #define RELOC_STD_BITS_LENGTH_LITTLE ((unsigned int) 0x06)
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| 370 | #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
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| 371 |
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| 372 | #define RELOC_STD_BITS_EXTERN_BIG ((unsigned int) 0x10)
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| 373 | #define RELOC_STD_BITS_EXTERN_LITTLE ((unsigned int) 0x08)
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| 374 |
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| 375 | #define RELOC_STD_BITS_BASEREL_BIG ((unsigned int) 0x08)
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| 376 | #define RELOC_STD_BITS_BASEREL_LITTLE ((unsigned int) 0x10)
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|---|
| 377 |
|
|---|
| 378 | #define RELOC_STD_BITS_JMPTABLE_BIG ((unsigned int) 0x04)
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|---|
| 379 | #define RELOC_STD_BITS_JMPTABLE_LITTLE ((unsigned int) 0x20)
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| 380 |
|
|---|
| 381 | #define RELOC_STD_BITS_RELATIVE_BIG ((unsigned int) 0x02)
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| 382 | #define RELOC_STD_BITS_RELATIVE_LITTLE ((unsigned int) 0x40)
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| 383 |
|
|---|
| 384 | #define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry. */
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| 385 |
|
|---|
| 386 | struct reloc_std_internal
|
|---|
| 387 | {
|
|---|
| 388 | bfd_vma r_address; /* Address (within segment) to be relocated. */
|
|---|
| 389 | /* The meaning of r_symbolnum depends on r_extern. */
|
|---|
| 390 | unsigned int r_symbolnum:24;
|
|---|
| 391 | /* Nonzero means value is a pc-relative offset
|
|---|
| 392 | and it should be relocated for changes in its own address
|
|---|
| 393 | as well as for changes in the symbol or section specified. */
|
|---|
| 394 | unsigned int r_pcrel:1;
|
|---|
| 395 | /* Length (as exponent of 2) of the field to be relocated.
|
|---|
| 396 | Thus, a value of 2 indicates 1<<2 bytes. */
|
|---|
| 397 | unsigned int r_length:2;
|
|---|
| 398 | /* 1 => relocate with value of symbol.
|
|---|
| 399 | r_symbolnum is the index of the symbol
|
|---|
| 400 | in files the symbol table.
|
|---|
| 401 | 0 => relocate with the address of a segment.
|
|---|
| 402 | r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
|
|---|
| 403 | (the N_EXT bit may be set also, but signifies nothing). */
|
|---|
| 404 | unsigned int r_extern:1;
|
|---|
| 405 | /* The next three bits are for SunOS shared libraries, and seem to
|
|---|
| 406 | be undocumented. */
|
|---|
| 407 | unsigned int r_baserel:1; /* Linkage table relative. */
|
|---|
| 408 | unsigned int r_jmptable:1; /* pc-relative to jump table. */
|
|---|
| 409 | unsigned int r_relative:1; /* "relative relocation". */
|
|---|
| 410 | /* unused */
|
|---|
| 411 | unsigned int r_pad:1; /* Padding -- set to zero. */
|
|---|
| 412 | };
|
|---|
| 413 |
|
|---|
| 414 |
|
|---|
| 415 | /* EXTENDED RELOCS. */
|
|---|
| 416 |
|
|---|
| 417 | struct reloc_ext_external
|
|---|
| 418 | {
|
|---|
| 419 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of of data to relocate. */
|
|---|
| 420 | bfd_byte r_index[3]; /* Symbol table index of symbol. */
|
|---|
| 421 | bfd_byte r_type[1]; /* Relocation type. */
|
|---|
| 422 | bfd_byte r_addend[BYTES_IN_WORD]; /* Datum addend. */
|
|---|
| 423 | };
|
|---|
| 424 |
|
|---|
| 425 | #ifndef RELOC_EXT_BITS_EXTERN_BIG
|
|---|
| 426 | #define RELOC_EXT_BITS_EXTERN_BIG ((unsigned int) 0x80)
|
|---|
| 427 | #endif
|
|---|
| 428 |
|
|---|
| 429 | #ifndef RELOC_EXT_BITS_EXTERN_LITTLE
|
|---|
| 430 | #define RELOC_EXT_BITS_EXTERN_LITTLE ((unsigned int) 0x01)
|
|---|
| 431 | #endif
|
|---|
| 432 |
|
|---|
| 433 | #ifndef RELOC_EXT_BITS_TYPE_BIG
|
|---|
| 434 | #define RELOC_EXT_BITS_TYPE_BIG ((unsigned int) 0x1F)
|
|---|
| 435 | #endif
|
|---|
| 436 |
|
|---|
| 437 | #ifndef RELOC_EXT_BITS_TYPE_SH_BIG
|
|---|
| 438 | #define RELOC_EXT_BITS_TYPE_SH_BIG 0
|
|---|
| 439 | #endif
|
|---|
| 440 |
|
|---|
| 441 | #ifndef RELOC_EXT_BITS_TYPE_LITTLE
|
|---|
| 442 | #define RELOC_EXT_BITS_TYPE_LITTLE ((unsigned int) 0xF8)
|
|---|
| 443 | #endif
|
|---|
| 444 |
|
|---|
| 445 | #ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE
|
|---|
| 446 | #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
|
|---|
| 447 | #endif
|
|---|
| 448 |
|
|---|
| 449 | /* Bytes per relocation entry. */
|
|---|
| 450 | #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
|
|---|
| 451 |
|
|---|
| 452 | enum reloc_type
|
|---|
| 453 | {
|
|---|
| 454 | /* Simple relocations. */
|
|---|
| 455 | RELOC_8, /* data[0:7] = addend + sv */
|
|---|
| 456 | RELOC_16, /* data[0:15] = addend + sv */
|
|---|
| 457 | RELOC_32, /* data[0:31] = addend + sv */
|
|---|
| 458 | /* PC-rel displacement. */
|
|---|
| 459 | RELOC_DISP8, /* data[0:7] = addend - pc + sv */
|
|---|
| 460 | RELOC_DISP16, /* data[0:15] = addend - pc + sv */
|
|---|
| 461 | RELOC_DISP32, /* data[0:31] = addend - pc + sv */
|
|---|
| 462 | /* Special. */
|
|---|
| 463 | RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
|
|---|
| 464 | RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
|
|---|
| 465 | RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
|
|---|
| 466 | RELOC_22, /* data[0:21] = (addend + sv) */
|
|---|
| 467 | RELOC_13, /* data[0:12] = (addend + sv) */
|
|---|
| 468 | RELOC_LO10, /* data[0:9] = (addend + sv) */
|
|---|
| 469 | RELOC_SFA_BASE,
|
|---|
| 470 | RELOC_SFA_OFF13,
|
|---|
| 471 | /* P.I.C. (base-relative). */
|
|---|
| 472 | RELOC_BASE10, /* Not sure - maybe we can do this the */
|
|---|
| 473 | RELOC_BASE13, /* right way now */
|
|---|
| 474 | RELOC_BASE22,
|
|---|
| 475 | /* For some sort of pc-rel P.I.C. (?) */
|
|---|
| 476 | RELOC_PC10,
|
|---|
| 477 | RELOC_PC22,
|
|---|
| 478 | /* P.I.C. jump table. */
|
|---|
| 479 | RELOC_JMP_TBL,
|
|---|
| 480 | /* Reputedly for shared libraries somehow. */
|
|---|
| 481 | RELOC_SEGOFF16,
|
|---|
| 482 | RELOC_GLOB_DAT,
|
|---|
| 483 | RELOC_JMP_SLOT,
|
|---|
| 484 | RELOC_RELATIVE,
|
|---|
| 485 |
|
|---|
| 486 | RELOC_11,
|
|---|
| 487 | RELOC_WDISP2_14,
|
|---|
| 488 | RELOC_WDISP19,
|
|---|
| 489 | RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
|
|---|
| 490 | RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
|
|---|
| 491 |
|
|---|
| 492 | /* 29K relocation types. */
|
|---|
| 493 | RELOC_JUMPTARG,
|
|---|
| 494 | RELOC_CONST,
|
|---|
| 495 | RELOC_CONSTH,
|
|---|
| 496 |
|
|---|
| 497 | /* All the new ones I can think of, for sparc v9. */
|
|---|
| 498 | RELOC_64, /* data[0:63] = addend + sv */
|
|---|
| 499 | RELOC_DISP64, /* data[0:63] = addend - pc + sv */
|
|---|
| 500 | RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 */
|
|---|
| 501 | RELOC_DISP21, /* data[0:20] = addend - pc + sv */
|
|---|
| 502 | RELOC_DISP14, /* data[0:13] = addend - pc + sv */
|
|---|
| 503 | /* Q .
|
|---|
| 504 | What are the other ones,
|
|---|
| 505 | Since this is a clean slate, can we throw away the ones we dont
|
|---|
| 506 | understand ? Should we sort the values ? What about using a
|
|---|
| 507 | microcode format like the 68k ? */
|
|---|
| 508 | NO_RELOC
|
|---|
| 509 | };
|
|---|
| 510 |
|
|---|
| 511 |
|
|---|
| 512 | struct reloc_internal
|
|---|
| 513 | {
|
|---|
| 514 | bfd_vma r_address; /* Offset of of data to relocate. */
|
|---|
| 515 | long r_index; /* Symbol table index of symbol. */
|
|---|
| 516 | enum reloc_type r_type; /* Relocation type. */
|
|---|
| 517 | bfd_vma r_addend; /* Datum addend. */
|
|---|
| 518 | };
|
|---|
| 519 |
|
|---|
| 520 | /* Q.
|
|---|
| 521 | Should the length of the string table be 4 bytes or 8 bytes ?
|
|---|
| 522 |
|
|---|
| 523 | Q.
|
|---|
| 524 | What about archive indexes ? */
|
|---|
| 525 |
|
|---|
| 526 | #endif /* __A_OUT_64_H__ */
|
|---|
