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From: Matheus Afonso Martins Moreira <matheus.a.m.moreira@gmail.com>
To: gcc@gcc.gnu.org
Subject: [RFC] Linux system call builtins
Date: Wed, 10 Apr 2024 11:10:00 -0300	[thread overview]
Message-ID: <adf8d3d032cc56a1e44c7340138c9cee@gmail.com> (raw)
In-Reply-To: <BAD977E8-1140-4812-AF5E-7E7E61728763@comcast.net>

> Yes, for regular function calls,
> but at least in the case of NetBSD,
> not for syscalls.

Those are the registers Linux uses for system calls on MIPS.
They are documented as such here:

https://www.man7.org/linux/man-pages/man2/syscall.2.html

> The second table shows the registers used
> to pass the system call arguments.
>
> ...
>
> mips/o32       a0    a1    a2    a3
> mips/n32,64    a0    a1    a2    a3    a4    a5
>
> ...

So they match the normal function calling convention? That's neat.
I don't have much experience with MIPS so I didn't recognize it.
I'm not sure how NetBSD does system calls but I know the ABI
is not considered stable.

  reply	other threads:[~2024-04-10 14:10 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-08  9:19 Matheus Afonso Martins Moreira
2024-04-08  9:58 ` Jonathan Wakely
2024-04-08 11:59   ` Matheus Afonso Martins Moreira
2024-04-08 14:00     ` Jonathan Wakely
2024-04-08 11:24 ` Florian Weimer
2024-04-08 11:44   ` Alexander Monakov
2024-04-08 11:50     ` Florian Weimer
2024-04-08 13:01       ` Alexander Monakov
2024-04-08 13:37   ` Matheus Afonso Martins Moreira
2024-04-08 18:18 ` Paul Iannetta
2024-04-08 18:26   ` Andrew Pinski
2024-04-08 20:01     ` Paul Iannetta
2024-04-08 20:20       ` Paul Koning
2024-04-10  1:48     ` Matheus Afonso Martins Moreira
2024-04-10 13:15       ` Paul Koning
2024-04-10 14:10         ` Matheus Afonso Martins Moreira [this message]
2024-04-10  1:26   ` Matheus Afonso Martins Moreira
2024-04-08 20:24 ` Paul Floyd
2024-04-10  2:19   ` Matheus Afonso Martins Moreira
2024-04-09 11:45 ` Szabolcs Nagy
2024-04-10  2:59   ` Matheus Afonso Martins Moreira
2024-04-10 11:04     ` Szabolcs Nagy
2024-04-10 14:00       ` Matheus Afonso Martins Moreira

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