File: callback.h

package info (click to toggle)
kdevelop3 4%3A3.2.0-1
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 58,220 kB
  • ctags: 33,997
  • sloc: cpp: 278,404; ansic: 48,238; sh: 23,721; tcl: 19,882; perl: 5,498; makefile: 4,717; ruby: 1,610; python: 1,549; awk: 1,484; xml: 563; java: 359; php: 20; asm: 14; ada: 5; pascal: 4; fortran: 4; haskell: 2; sql: 1
file content (24 lines) | stat: -rw-r--r-- 743 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
#ifndef __CALLBACK_H__
#define __CALLBACK_H__

/* This is a workaround for a bug in the current version of gcc:

   gcc assumes that no one will touch %a4 after it is set up in crt0.o.
   This isn't true if a function is called as a callback by something
   that wasn't compiled by gcc (like FrmCloseAllForms()).  It may also
   not be true if it is used as a callback by something in a different
   shared library.

   We really want a function attribute "callback" which will insert this
   progloue and epilogoue automatically.
   
      - Ian */

register void *reg_a4 asm("%a4");

#define CALLBACK_PROLOGUE \
    void *save_a4 = reg_a4; asm("move.l %%a5,%%a4; sub.l #edata,%%a4" : :);

#define CALLBACK_EPILOGUE reg_a4 = save_a4;

#endif