Using x64 NASM ASM with MSVC2008 x64

[mudlord]

Okay, I ran into a problem. Win95-XP 32bit version is fine, Vista/Win7 x64 version has major issues with NASM.

My commandline for NASM is this:
nasm.exe -f win64 "$(InputName).asm" -o "$(InputName).obj" -s -O9
Output is:
$(InputName).obj

Resulting error is:
"unresolved external symbol (blahblah in function blahblah"

I am importing a huge amount of binary data using x64 ASM to simplify things. Amounting to around 324KB. Imported using "incbin" in NASM. All data goes in the .data section, I did not use a seperate section for the bin data.

I used

Code: Select all

extern "C" {
		extern DWORD somedata;
		extern DWORD somedata_LENGTH;
}

in MSVC to define the data. Again, works great in Win32, fails compilation in x64. And BTW, thats the only compile error. Everything else works fine.

Help is appreciated.

[grinvader]

Resulting error is:
"unresolved external symbol (blahblah in function blahblah"

I assume starting there would be a good point.

[mudlord]

Thanks Grin, that was the pointer I needed.

Seems some certain things were done a little bit differently compared to the 32-bit version, like how data chunks are defined in x64 ASM.
Fixing my x64 ASM source files to comply with the changes fixed the issue.