Re: Hello Assembly!
On Wednesday, 12 August 2015 at 22:32:30 UTC, Adam D. Ruppe wrote: On Wednesday, 12 August 2015 at 22:18:41 UTC, Adam D. Ruppe wrote: [...] Here's an example: [...] Wow, very cool thanks!
Re: Hello Assembly!
On Wed, 12 Aug 2015 22:10:30 +, Taylor Hillegeist wrote: I figure this should do it. but i'm running into problems. Anybody know why? Describe problems
Re: Hello Assembly!
On Wednesday, 12 August 2015 at 22:18:41 UTC, Adam D. Ruppe wrote:
The way you'd typically do it on Windows is to just call one of
the win32 api functions, similarly to how you'd do it from C or
regular D, just calling the functions manually.
Here's an example:
import core.sys.windows.windows; // make the names of C funcs
available
void main() {
int written; // just let D handle the local var for us
asm
{
// the goal is:
// WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE),
myhello.ptr, myhello.length, written, null);
// so call GetStdHandle first
push STD_OUTPUT_HANDLE;
call GetStdHandle;
// the return value is now in EAX
mov EBX, EAX; // save it for later in EBX
// we push arguments from right to left for the
WriteConsoleA call..
push 0; // null
mov EAX, written; // local vars in D are available too
push EAX; // written
push 13; // length of HELLO, WORLD\n
lea EAX, myhello; // the address of our string
push EAX; // pointer
push EBX; // our saved handle from before
call WriteConsoleA;
jmp past_hello; // need to jump past the string since it
isn't actually executable code!
myhello:
db HELLO, WORLD\n;
past_hello:
nop;
}
}
That should run successfully.
Putting the string in a db like that isn't ideal either, you
should probably just put it in an ordinary D variable too so the
compiler can place it in the right place.
Then you can also load it. Since D asm complains about the .ptr
property thinking it means an instruction, I would do something
like:
string hello = HELLO, WORLD\n;
auto myhello = hello.ptr;
Then you can just `mov EAX, myhello;` and it will work.
Re: Hello Assembly!
On Wednesday, 12 August 2015 at 22:18:41 UTC, Adam D. Ruppe wrote: On Wednesday, 12 August 2015 at 22:10:32 UTC, Taylor Hillegeist wrote: So i was playing around with the D inline assembly trying to make it say hello world on my windows setup... Have you ever written assembly for Windows before? Your code looks more like DOS (aside from the EAX, which would be overwriten by the AH mov anyway! In DOS, I think it was DX.) But DOS code won't work here anyway, since it was 16 bit and D makes 32 or 64 bit exes. The way you'd typically do it on Windows is to just call one of the win32 api functions, similarly to how you'd do it from C or regular D, just calling the functions manually. Ahh, It probably is! I was looking for a minimal example. DOS != Windows CMD I was following the example on http://web.archive.org/web/20100529113659/http://home.comcast.net/~fbkotler/clueless.html It is werid working with asm on windows... RISC/asm is much more fimilar to me..
Re: Hello Assembly!
On Wednesday, 12 August 2015 at 22:14:58 UTC, Justin Whear wrote: On Wed, 12 Aug 2015 22:10:30 +, Taylor Hillegeist wrote: I figure this should do it. but i'm running into problems. Anybody know why? Describe problems object.Error@(0): Access Violation 0x00402028 0x38004023 0x6C0018FF 0x38004023 0xE50018FF 0xA1004022 0x010041E0 0x3800 0x5C0018FF 0x3801 0xD00018FF 0xF40100FD 0x780018FD 0x1E0018FF Thats pretty much it!
Re: Hello Assembly!
On Wednesday, 12 August 2015 at 22:10:32 UTC, Taylor Hillegeist wrote: So i was playing around with the D inline assembly trying to make it say hello world on my windows setup... Have you ever written assembly for Windows before? Your code looks more like DOS (aside from the EAX, which would be overwriten by the AH mov anyway! In DOS, I think it was DX.) But DOS code won't work here anyway, since it was 16 bit and D makes 32 or 64 bit exes. The way you'd typically do it on Windows is to just call one of the win32 api functions, similarly to how you'd do it from C or regular D, just calling the functions manually.
