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63 lines
1.8 KiB
Groff
63 lines
1.8 KiB
Groff
.TH SEGEDIT 1 "October 23, 1997" "Apple Computer, Inc."
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.SH NAME
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segedit \- extract and replace sections from object files
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.SH SYNOPSIS
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.B segedit
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[ option ] name ...
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.I input_file
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[\-extract
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.IR "segname sectname filename" "] ..."
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[[\-replace
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.IR "segname sectname filename" "] ..."
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\-output
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.IR output_file ]
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.SH DESCRIPTION
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.I Segedit
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extracts and or replaces the named sections from the
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.I input_file
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and creates an
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.I output_file
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(if replacing a section). The segment and section names are
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the same as specified to
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.IR ld (1)
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with the
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.B \-segcreate
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option. The segment and section names of an object file can be examined with
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the
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.B \-l
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option to
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.IR otool (1).
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Only sections in segments that have no relocation to or for them can be
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replaced (marked with the
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.SM SG_NORELOC
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segment flag) but all sections can be
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extracted.
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.PP
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The options to
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.IR segedit (1):
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.TP
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.BI \-extract " segname sectname filename"
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Extracts the section specified by the segment name section name pair and places
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the contents in the specified
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.I filename.
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.TP
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.BI \-replace " segname sectname filename"
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Will replace the section specified by the segment name section name pair and
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places and take the new contents for the section from the specified
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.I filename.
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The
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.BI \-output " filename"
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option must also be specified.
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The resulting size of the section will be rounded to a multiple of 4 bytes and
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padded with zero bytes if necessary.
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.TP
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.BI \-output " output_file"
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Specifies the output file to create when replacing sections.
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.SH "SEE ALSO"
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ld(1), otool(1)
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.SH "LIMITATIONS"
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Only mach-O format files that are laid out in a contiguous address space
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and with their contents ordered in the order of increasing address can have
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their segments replaced by this program. This layout is what the link editor
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produces by default.
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