thank you for your help!
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| YASM error: 'coff: invalid relocation size' https://forum.osdev.org/viewtopic.php?f=13&t=17058 |
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| Author: | HJED [ Sat May 24, 2008 9:55 pm ] |
| Post subject: | YASM error: 'coff: invalid relocation size' |
Hello i have this annoying error in my code start.asm(443) : error: coff: invalid relocation size this error only occurs when I assemble the code using the win64 format but this is required as i am using a windows 64bit Linker the code in question is Code: extern _portid extern _res global _aoutportb _aoutportb: mov dx, _portid in ax, dx mov [_res], al _res is declared in my c++ code as Code: unsigned char res=0; and _portid is declared as Code: unsigned short portid (the value varies)line 443 is in the above asm code Code: mov dx, _portid
thanks for any help |
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| Author: | jnc100 [ Sun May 25, 2008 4:23 am ] |
| Post subject: | |
Perhaps the 64-bit version of coff does not support 16 bit relocations? My guess is its trying to output something like 66 ba 00 00 (i.e. mov dx, imm16) and then point the relocation to the 16-bit field (because what you're actually asking for is an address). If you want the actual value of the portid variable, try mov dx, [_portid], which should produce an opcode using modrm and a 32-bit offset (and therefore should assemble fine). Regards, John. |
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| Author: | HJED [ Sun May 25, 2008 3:42 pm ] |
| Post subject: | |
thank you for your help!
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