https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91779
--- Comment #10 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Andreas Schwab from comment #9)
> Created attachment 46893 [details]
> libfi.so.7
This attached library has exactly the same problem.
Put a breakpoint at:
0x08049265 <+341>: pushl -0x60(%ebp)
* 0x08049268 <+344>: call *-0x54(%ebp)
0x0804926b <+347>: movzbl -0x59(%ebp),%eax
then:
Breakpoint 1, 0x08049268 in main ()
(gdb) p $sp
$1 = (void *) 0xffffce60
(gdb) ni
Char f(Char,double,Char):({'A'},0.2,{'C'})->{'B'}
0x0804926b in main ()
(gdb) p $sp
$2 = (void *) 0xffffce80
The called STDCALL function should adjust stack by 0x14 here, this is what
compiler claims:
(call_insn 115 114 116 7 (parallel [
(call (mem:QI (mem/f/c:SI (plus:SI (reg/f:SI 6 bp)
(const_int -84 [0xffffffffffffffac])) [23
callback_code+0 S4 A32]) [0 *callback_code.865_10 S1 A8])
(const_int 32 [0x20]))
(set (reg/f:SI 7 sp)
(plus:SI (reg/f:SI 7 sp)
(const_int 20 [0x14])))
]) "../../testsuite/libffi.bhaible/test-callback.c":2325:13 673
{*call_pop}
(expr_list:REG_ARGS_SIZE (const_int 12 [0xc])
(expr_list:REG_CALL_DECL (nil)
(nil)))
(nil))
