Re: [Lightning] How to get call address / instruction pointer without a hack?

[Paulo César Pereira de Andrade]

2014-03-11 12:18 GMT-03:00 Paulo César Pereira de Andrade
<address@hidden>:
> 2014-03-10 14:22 GMT-03:00 Bruno Loff <address@hidden>:
>
>   I just pushed an "experimental" interface to instruct lightning to use an
> alternate code buffer, see
> http://git.savannah.gnu.org/cgit/lightning.git/commit/?id=79bc3d03dd1c76d8a37ed3c12becbd9b71c142be

  Now I implemented jit_set_data to use an alternate, or disable the data
buffer, see
http://git.savannah.gnu.org/cgit/lightning.git/commit/?id=33ee2337c7cad06b40fa1179f97e0c6ef2bd3dc9

  Most common usage should be to disable constants and debug notes.
On a few ports it already does not use a constant data buffer (aarch64
and arm, and maybe would be better so also in mips). The common
usage should be:

    jit_realize();
    jit_set_data(NULL, 0, JIT_DISABLE_DATA | JIT_DISABLE_NOTE);

  To have only a pure code buffer, and if you also did use jit_set_code(),
you can safely call jit_destroy_state() to release all memory and still
have the code buffer.
  If you call jit_set_data you must give a valid pointer unless disabling
data constants and debug notes.

  To query the space, after jit_realize, call:

  jit_get_note(&data_size, &note_size);

  One of my next steps should be to add detailed documentation to
lightning.info, as only the new test cases are not descriptive enough
about the usage.

  Thanks,
Paulo