FreeBSD AMD64 kernel calling convention

[Daniel Cervus]

  Hi, everyone. I’m learning AMD64 assembly language. But seems I cannot find much information about FreeBSD kernel interface, does it follows the same calling convention as described in System V AMD64 ABI? Or it is like Linux kernel calling convention, uses R10 instead of RCX to pass parameters?

 

Daniel

[Paul Procacci]

It's the same as Linux.

rdi, rsi, rdx, r10, r8, r9  in that order.  rcx and r11 destroy'd immediately upon syscall invocation.

Thanks,

Paul Procacci

On Wed, Jan 18, 2023 at 11:08 PM Daniel Cervus <Daniel...@outlook.com> wrote:

  Hi, everyone. I’m learning AMD64 assembly language. But seems I cannot find much information about FreeBSD kernel interface, does it follows the same calling convention as described in System V AMD64 ABI? Or it is like Linux kernel calling convention, uses R10 instead of RCX to pass parameters?

 

Daniel

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