HDR(1)               INTERACTIVE UNIX System               HDR(1)



          NAME
               hdr - display selected parts of a XENIX object file

          SYNOPSIS
               hdr [ -dhmprsSt ] file ...

          DESCRIPTION
               hdr displays XENIX object file headers, symbol tables, and
               text or data relocation records in ASCII formats.  It also
               prints out seek positions for the various segments in the
               object file.  A.out, x.out, and x.out segmented formats and
               archives are understood.

               The symbol table format consists of six fields.  In a.out
               formats the third field is missing.  The first field is the
               symbol's index or position in the symbol table, printed in
               decimal.  The index of the first entry is zero.  The second
               field is the type, printed in hexadecimal.  The third field
               is the s_seg field, printed in hexadecimal.  The fourth
               field is the symbol's value in hexadecimal.  The fifth field
               is a single character that represents the symbol's type as
               in nm(CP), except C common is not recognized as a special
               case of undefined.  The last field is the symbol name.

               If long form relocation is present, the format consists of
               six fields.  The first is the descriptor, printed in hexade-
               cimal.  The second is the symbol ID or index, in decimal.
               This field is used for external relocations as an index into
               the symbol table.  It should reference an undefined symbol
               table entry.  The third field is the position, or offset,
               within the current segment at which relocation is to take
               place; it is printed in hexadecimal.  The fourth field is
               the name of the segment referenced in the relocation:  text,
               data, bss, or EXT for external.  The fifth field is the size
               of relocation:  byte, word (2 bytes), or long.  The last
               field will indicate, if present, that the relocation is
               relative.

               If short form relocation is present, the format consist of
               three fields.  The first field is the relocation command in
               hexadecimal.  The second field contains the name of the seg-
               ment referenced:  text or data.  The last field indicates
               the size of relocation:  word or long.

               The hdr options are:

               -d      Prints the data relocation records.

               -h      Prints the object file header and extended header.
                       Each field in the header or extended header is
                       labeled.  This is the default option.

               -m      Prints the text and data segments.  This option is


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          HDR(1)               INTERACTIVE UNIX System               HDR(1)



                       similar to the -S option but only for text and data
                       segments.

               -p      Prints the seek positions as defined by macros in
                       the include file <a.out.h>.

               -r      Prints both text and data relocation records.

               -s      Prints the symbol table.

               -S      Prints the file segment table with a header.  (Only
                       applicable to x.out segmented executable files.)

               -t      Prints the text relocation records.

          SEE ALSO
               nm(1), a.out(4).

          NOTES
               hdr is only for use with object files created under XENIX.



































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