1987-01-29 14:17:23 +00:00
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.TH LED 6ACK
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1987-03-11 13:34:07 +00:00
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.ad
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1987-01-29 14:17:23 +00:00
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.SH NAME
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led \- link editor
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.SH SYNOPSIS
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.B led
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[ option ] ... file ...
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.SH DESCRIPTION
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.I Led
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is a link editor for object modules,
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created by one of the ACK assemblers.
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It combines several
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object programs into one,
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resolves external references,
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and searches archives.
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In the simplest case several object
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.I files
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are given, and
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.I led
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combines them, producing
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an object module which can be either
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fed into a machine specific conversion program
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or become the input for a further
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.I led
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run.
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(In the latter case, if there are no unresolved references,
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the
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.B \-r
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option must be given
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to preserve the relocation information.)\
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The resulting object file of
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.I led
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is named
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.BR a.out .
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.PP
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The argument routines are concatenated in the order specified.
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The entry point of the output is the
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beginning of the first routine.
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.PP
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If an argument is an archive, its table of contents is searched
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for names which are undefined at the point at which the argument
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is encountered in the argument list.
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This procedure is repeated as long as unresolved references are
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satisfied.
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.PP
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.I Led
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understands several options.
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The flags
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.BR \-c ,
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.BR \-r ,
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.BR \-s ,
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and
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.B \-u
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should appear before the file names.
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.TP
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.BI \-a dd:nnnn
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The alignment of section
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.IR dd ,
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where
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.I dd
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is a decimal number,
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is set to
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.IR nnnn .
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If
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.I nnnn
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starts with `0x', it is hexadecimal,
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else if its starts with `0b', it is binary,
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else if it starts with `0', it is octal,
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else it is decimal.
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.TP
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.BI \-b dd:nnnn
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The base addres in the machine of section
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.IR dd ,
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is set to
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.IR nnnn .
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The previous remarks about
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.I dd
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and
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.I nnnn
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apply.
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.TP
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.B \-o
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The
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.I name
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argument after
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.B \-o
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is used as the name of the
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.I led
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output file, instead of
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.BR a.out .
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.TP
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.B \-r
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Generate relocation information in the output file
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so that it can be the subject of another
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.I led
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run.
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This flag suppresses the `Undefined:' diagnostic.
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.TP
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.B \-c
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Only effective in combination with
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.BR \-r .
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Indicates that relocatable output must be produced, but commons must
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be resolved.
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This may be useful for machines that need a last relocation step
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at load time.
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.TP
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.B \-s
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`Strip' the output, that is, remove the name table
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and relocation information to save space (but impair the
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usefulness of the debuggers).
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.TP
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.B \-u
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Take the following argument as a symbol and enter
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it as undefined in the name table.
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This is useful for loading wholly from a library,
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since initially the name table is empty
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and an unresolved reference is needed
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to force the loading of the first routine.
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.SH FILES
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~em/lib/em_led
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a.out output file
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.SH "SEE ALSO"
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ack(1)
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arch(1)
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ack.out.h(5)
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uni_ass(6)
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