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Annotation of researchv10dc/man/manb/80.out.5, revision 1.1

1.1     ! root        1: .th "80.out" 5 "March 1,1977"
        !             2: .sh NAME
        !             3: 80.out \*- assembler and link editor output
        !             4: .sh DESCRIPTION
        !             5: .it "80.out"
        !             6: is the output file of the assembler
        !             7: .it "as80"
        !             8: and the link editor
        !             9: .it "ld80".
        !            10: Both programs make
        !            11: .it "80.out"
        !            12: executable if there were no
        !            13: errors and no unresolved external references.
        !            14: .s3
        !            15: .it 80.out
        !            16: has five sections:
        !            17: header, text, data, relocation information and a symbol table (in that order).
        !            18: The last two sections may be empty if the program was loaded with
        !            19: the ``\*-b'', ``\*-d'' or ``\*-t'' option of
        !            20: .it ld80.
        !            21: .s1
        !            22: (Constants beginning with `0' are octal values.)
        !            23: .s3
        !            24: .it HEADER
        !            25: .s3
        !            26: The header always contains 040 bytes:
        !            27: .lp +10 8
        !            28: Address        Contents
        !            29: .lp +10 8
        !            30: (octal)
        !            31: .s1
        !            32: .lp +10 8
        !            33: 0-1    Magic number (0413)
        !            34: .lp +10 8
        !            35: 2-3    Size of text segment
        !            36: .lp +10 8
        !            37: 4-5    Size of data segment
        !            38: .lp +10 8
        !            39: 6-7    Size of bss segment
        !            40: .lp +10 8
        !            41: 10-11  Size of symbol table
        !            42: .lp +10 8
        !            43: 12-13  Load origin of text segment
        !            44: .lp +10 8
        !            45: 14-15  Load origin of data segment
        !            46: .lp +10 8
        !            47: 16-20  Load origin of bss segment
        !            48: .lp +10 8
        !            49: 20-21  Size of relocation table
        !            50: .lp +10 8
        !            51: 22-23  A word of flags
        !            52: .lp +10 8
        !            53: 24-37  Padding
        !            54: .s3
        !            55: .i0
        !            56: The size of each segment is in bytes.
        !            57: The size of the header is not included in any of the other sizes.
        !            58: .s3
        !            59: The flag values are:
        !            60: .lp +20 7
        !            61: Bit    Meaning
        !            62: .lp +20 7
        !            63: 0      If set, no relocation information is present.
        !            64: .i0
        !            65: .s3
        !            66: The start of the text segment in the file is 040,
        !            67: the start of the data is (040 + text size),
        !            68: the start of the relocation is (040 + text + data size),
        !            69: and the start of the symbol table is (040 + text size + data size + relocation size).
        !            70: .s3
        !            71: .it "RELOCATION INFORMATION"
        !            72: .s3
        !            73: The relocation information (if present)
        !            74: occupies one or two bytes for each byte or word of text or data.
        !            75: The bits of the relocation word (or byte) are:
        !            76: .s3
        !            77: .lp +10 8
        !            78: Bit    Meaning
        !            79: .s3
        !            80: .lp +10 8
        !            81: 6-15   Symbol number in symbol table for external references.
        !            82: The firat symbol is numbered 0.
        !            83: .lp +10 8
        !            84: 5      High-byte flag: If set, the next byte of text or data is to be treated as the high
        !            85: order byte of a 16-bit quantity for relocation purposes.
        !            86: .lp +10 8
        !            87: 4      Two-byte flag: If set, the next two bytes of text or data are to be
        !            88: treated as a 16-bit quantity for relocation purposes.
        !            89: .lp +10 8
        !            90: 3      External flag: If set, bits 15-6 contain a symbol number, otherwise, only one byte
        !            91: of relocation information is present.
        !            92: .lp +10 8
        !            93: 0-2    Segment information:
        !            94: .lp +20 5
        !            95: 0      absolute
        !            96: .lp +20 5
        !            97: 1      text
        !            98: .lp +20 5
        !            99: 2      data
        !           100: .lp +20 5
        !           101: 3      bss
        !           102: .i0
        !           103: .s3
        !           104: .sh "SEE ALSO"
        !           105: "as80" (I), "ld80" (I), "nm80" (I)
        !           106: .s3
        !           107: .it "SYMBOL TABLE"
        !           108: .s1
        !           109: The symbol table entries consist of six words:
        !           110: .s3
        !           111: .lp +10 8
        !           112: Word   Meaning
        !           113: .s1
        !           114: .lp 1-4        The first four words contain the left justified, null-padded ASCII symbol name.
        !           115: .lp +10 8
        !           116: The fifth word is a flag indicating the type of the symbol.
        !           117: The following values are possible:
        !           118: .lp +20 5
        !           119: 00     undefined
        !           120: .lp +20 5
        !           121: 01     absolute
        !           122: .lp +20 5
        !           123: 02     text
        !           124: .lp +20 5
        !           125: 03     data
        !           126: .lp +20 5
        !           127: 04     bss
        !           128: .lp +20 5
        !           129: 05     file name symbol (produced by ld80)
        !           130: .lp +20 5
        !           131: 010    undefined external
        !           132: .lp +20 5
        !           133: 011    absolute external
        !           134: .lp +20 5
        !           135: 012    text segment external
        !           136: .lp +20 5
        !           137: 013    data segment external
        !           138: .lp +20 5
        !           139: 014    bss segment external
        !           140: .lp +10 8
        !           141: 6      The sixth word is the value of the symbol.
        !           142: .i0
        !           143: .s3
        !           144: The sixth word of a symbol table entry contains the value of the symbol.
        !           145: .s3
        !           146: .s3
        !           147: The value of a word in the text or data portions which is not
        !           148: a reference to an undefined external symbol
        !           149: is exactly that value which will appear in core
        !           150: when the file is executed.
        !           151: If a word in the text or data portion
        !           152: involves a reference to an undefined external symbol,
        !           153: as indicated by the relocation bits
        !           154: for that word,
        !           155: then the value of the word as stored in the file
        !           156: is an offset from the associated external symbol.
        !           157: When the file is processed by the
        !           158: link editor and the external symbol becomes
        !           159: defined, the value of the symbol will
        !           160: be added into the word in the file.
        !           161: .s3

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