ld -relax on SH coff

[Schirmer, Hartmut]

Hi,

-relax doesn't work well on Hitachi SH

A.) Offset added multiple times

    In my linker script I define an external jump table
    SECTIONS
    {
    /*** DRAM ***/
    [...]
    .jumptable (NOLOAD):
        {
            . = . + 0x0010;
            * (.jptable)
        } >dram_jmp =0x0000
    [...]
    }

    After I disabled sh_relax_section() in bfd/coff-sh.c
    I checked the size of .jumptable in the map file:
      normal:      0xc10
      with -relax: 0xc20

   This worked after shifting the dram_jmp by 0x0010


B.) Software crashes

    The resulting image runs quite well. Sadly it crashes
    with an 'illegale opcode' cpu exception in at least on
    source file.

    I disabled parts of sh_relax_section():
     - the mov.l alignment code   -> still crashes
     - delete after jsr-bsr relax -> code works

    Looks like sh_relax_delete_bytes() mixed up something.

    I have no chance to debug the target, sorry.

Hartmut

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innovative systems GmbH
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Hartmut Schirmer
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