[Mingw-users] [mingw] memcpy + global register variable [ edited ]

[RomikB <ro...@ma...>]

Hello mingw-users,

I write this code:

/*******************************************************************************/

register unsigned long *psxregs __asm__("esi");

static long ___LoadHeader( long hfile , struct EXEC *exec)//bfc03c90
{
    char buf[0x800];
    if( hleread( hfile , buf , 0x00000800 ) < 0x00000800 ) return 0;
    memcpy( exec , buf + 0x10 , 0x0000003c );//at bfc02b50
    return 1;
}

void foo(void)
{
     psxregs = something;//or//something = psxregs;
     ...
}

/*******************************************************************************/

And get this error.

/*******************************************************************************/

../plugin_libapi.c: In function `___LoadHeader':
../plugin_libapi.c:432: error: unable to find a register to spill in class `SIREG'
../plugin_libapi.c:432: error: this is the insn:
(insn:HI 33 31 37 2 01621810 (parallel [
            (set (reg:SI 2 ecx [67])
                (const_int 0 [0x0]))
            (set (reg/f:SI 5 edi [64])
                (plus:SI (ashift:SI (reg:SI 2 ecx [66])
                        (const_int 2 [0x2]))
                    (reg/v/f:SI 60)))
            (set (reg/f:SI 0 eax [65])
                (plus:SI (ashift:SI (reg:SI 2 ecx [66])
                        (const_int 2 [0x2]))
                    (reg/f:SI 0 eax [65])))
            (set (mem:BLK (reg/v/f:SI 60) [0 S60 A32])
                (mem:BLK (reg/f:SI 0 eax [65]) [0 S60 A128]))
            (use (reg:SI 2 ecx [66]))
            (use (reg:SI 19 dirflag))
        ]) 451 {rep_movsi} (insn_list 29 (insn_list 30 (insn_list 31 (nil))))
    (expr_list:REG_DEAD (reg:SI 19 dirflag)
        (expr_list:REG_DEAD (reg:SI 2 ecx [66])
            (expr_list:REG_DEAD (reg/v/f:SI 60)
                (expr_list:REG_UNUSED (reg:SI 2 ecx [67])
                    (expr_list:REG_UNUSED (reg/f:SI 5 edi [64])
  
/*******************************************************************************/

This Error depend from 3 strings:

1)register unsigned long *psxregs __asm__("esi");
2)memcpy( exec , buf + 0x10 , 0x0000003c );//at bfc02b50
3)psxregs = something;//or//something = psxregs;

it because of bad implementation of "memcpy" function, can you fix it

PS: It's very old error...

-- 
Best regards,
 RomikB                          mailto:ro...@ma...