macOS ASM on Mac OS X

[Cromulent]

<snip>

Thank you. Right now I know what the correct syntax is for Mac OS X assembly I can move forward. I've read so many tutorials and because I didn't know I didn't know if they were in the correct style or not.

That was incredibly useful.

Interestingly though the program you posted above only worked on my machine if I swapped the write() function and the file descriptor functions around. It said bad system call otherwise.

Also assembly does not seem to interpret '\n' as C does. I guess I'll need to use the raw code for a new line character and the append it on the end of every string?

Edit : It seems you don't need a newline character at all. Hmm that's odd, I would have thought you would have had to explicitly state that you wanted to have a newline?

 

[lee1210]

I'm not sure about the argument order. That was the order in the ex. I found. In the example I posted the newline is explicitly included. It is the 0xa after the string. That's the ASCII newline. Grab an ASCII chart, as the C escape sequences will not work. If you used C bindings then called libc's printf, you obviously could, but you'd need to take care in null terminating then.

-Lee

I apologize for typos in this. Posted from my phone.

 

[Cromulent]

I'm not sure about the argument order. That was the order in the ex. I found. In the example I posted the newline is explicitly included. It is the 0xa after the string. That's the ASCII newline. Grab an ASCII chart, as the C escape sequences will not work. If you used C bindings then called libc's printf, you obviously could, but you'd need to take care in null terminating then.

-Lee

I apologize for typos in this. Posted from my phone.

Ah, I see. It is all starting to make sense now . Excellent, onwards and upwards as they say.

 

[Cromulent]

I know this is an old thread but I thought I would bump it as I found some interesting information. For those (like me) who are interested in ASM but feel a little lost at the start the High Level Assembly language seems like a great way to get into it. Think of it as mid way between ASM and C.

The book is available free here.

The Mac OS X version of the library / compiler is here.

If anyone needs a hand getting it setup let me know, the instructions in the book are just for Linux / Windows but it is pretty straight forward on Mac OS X too.

 

[Muncher]

I know this is an old thread but I thought I would bump it as I found some interesting information. For those (like me) who are interested in ASM but feel a little lost at the start the High Level Assembly language seems like a great way to get into it. Think of it as mid way between ASM and C.

The book is available free here.

The Mac OS X version of the library / compiler is here.

If anyone needs a hand getting it setup let me know, the instructions in the book are just for Linux / Windows but it is pretty straight forward on Mac OS X too.

Back from the dead! I've heard of that, but I didn't know it had an os x variant. Cool .

 

[brian6504]

I learned MIPS assembly, which is similar to PowerPC, but used the SPIM emulator to develop. I would recommend using some sort of emulation tool so you can see the registers and stack all the time and not have worry about working your way through a debugger.

After that it was pretty easy to pick up PowerPC and x86.