Large address aware

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rugxulo

Joined: 09 Aug 2005
Posts: 2341
Location: Usono (aka, USA)

rugxulo 24 Feb 2009, 07:46

flatter?
bigflat?
huge_momma_flatso?

(Okay, maybe not the last one.) Wink

24 Feb 2009, 07:46

roxaz

Joined: 27 Jul 2008
Posts: 25

roxaz 16 Aug 2009, 15:13

should this code generate "Error 1 error LNK2017: 'ADDR32' relocation to '.data' invalid without /LARGEADDRESSAWARE:NO"?

format MS64 COFF
include '%fasminc%\win64a.inc'

section '.data' data readable writeable

crc32_table \
dq 000000000h,077073096h,0EE0E612Ch,0990951BAh,0076DC419h,0706AF48Fh,0E963A535h,09E6495A3h

section '.text' code readable executable

proc _crc32
xor rdx, rdx
xor rax, [crc32_table+rdx*8]
ret
endp

Code:


xor     rax, [crc32_table+rdx*8] is what causes error, however it looks perfectly healthy line to me..

16 Aug 2009, 15:13

Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 19 Aug 2009, 10:03

revolution wrote:

Nobody needs to compare addresses like that. Windows still allocates memory at 0x7FFxxxxx for itself so it is not like you get a contiguous block of RAM to use that straddles the boundary to 0x80000000. You have to allocate separate regions to be able to use the high RAM. Doing an address comparison across different regions would not really make sense.

Windows might do this.. but what about other OSs?

19 Aug 2009, 10:03

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8353
Location: Kraków, Poland

Tomasz Grysztar 12 Sep 2010, 09:16

1.69.23 has this flag implemented as "large" keyword. Use it like:

Code:

format PE GUI 4.0 large

Code:

format PE large GUI 4.0

12 Sep 2010, 09:16

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 12 Sep 2010, 10:41

Tomasz Grysztar wrote:

revolution wrote:
If you boot in 3GB mode then the flag is used, if you boot normally then the flag is ignored.

The flag appears also to be used in WoW64 - well, it seemed quite obvious.
And in WoW64 your application may actually get to use the whole 4 GB space, not only 3 GB.

Indeed it can Smile

- see http://blogs.technet.com/b/markrussinovich/archive/2008/11/17/3155406.aspx .

_________________

- carpe noctem

12 Sep 2010, 10:41

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