/g/ - Thread 108613877

Anonymous
syscall of the day: (arch_)prctl 04/16/26(Thu)10:58:18 No.108613877

syscall of the day: (arch_)prctl Anonymous 04/16/26(Thu)10:58:18 No.108613877 [Reply]▶

previous: >>108609319
#define __NR_prctl                    157
#define __NR_arch_prctl                158
https://man7.org/linux/man-pages/man2/prctl.2.html
https://man7.org/linux/man-pages/man2/arch_prctl.2.html

tl;dr:
manage your process state

this is one of my all-time favorite syscalls. it's SO powerful. if you want to do anything even moderately interesting to your process, then you are beholden to this syscall. i might honestly just try to keep this thread bumped until the weekend and then answer questions about specific arguments, if people have them. you're definitely going to want to look at the "see also" section for this one. it's basically dozens of syscalls bundled into one
have you ever used any of these features, anon? in what circumstances?

relevant resources:
man man
man syscalls
https://man7.org/linux/man-pages/
https://linux.die.net/man/
https://elixir.bootlin.com/linux/
https://elixir.bootlin.com/musl/
https://elixir.bootlin.com/glibc/

16 RepliesView Thread

Showing all 16 replies.

Anonymous
04/16/26(Thu)11:38:58 No.108614034

Anonymous 04/16/26(Thu)11:38:58 No.108614034▶

>>108613877
Debian is DEI shit, cringe to mention it

Anonymous
04/16/26(Thu)12:05:53 No.108614162

Anonymous 04/16/26(Thu)12:05:53 No.108614162▶

>>108614034
yeah okay kid whatever you say

Anonymous
04/16/26(Thu)13:12:55 No.108614531

Anonymous 04/16/26(Thu)13:12:55 No.108614531▶

installing debian with OP

Anonymous
04/16/26(Thu)13:17:41 No.108614562

Anonymous 04/16/26(Thu)13:17:41 No.108614562▶

i will install debian too, let me in!!!!

Anonymous
04/16/26(Thu)17:03:41 No.108616136

Anonymous 04/16/26(Thu)17:03:41 No.108616136▶

installing debian with >>108614562 and OP

Anonymous
04/16/26(Thu)20:24:05 No.108617575

Anonymous 04/16/26(Thu)20:24:05 No.108617575▶

>>108614531
>>108614562
>>108616136
yaaayyyyyy >w< it's a party!!!

Anonymous
04/16/26(Thu)20:32:31 No.108617638

Anonymous 04/16/26(Thu)20:32:31 No.108617638▶

i look like that and i have that apartment and those clothes but theyre blue instead of green

Anonymous
04/16/26(Thu)20:37:12 No.108617666

Anonymous 04/16/26(Thu)20:37:12 No.108617666▶

>>108617638
post

Anonymous
04/16/26(Thu)20:49:26 No.108617744

Anonymous 04/16/26(Thu)20:49:26 No.108617744▶

>>108613877
How exactly do I use a syscall?

Anonymous
04/16/26(Thu)20:51:00 No.108617758

Anonymous 04/16/26(Thu)20:51:00 No.108617758▶

>>108617744
https://elixir.bootlin.com/musl/v1.2.6/source/arch/x86_64/syscall_arch.h
like so

Anonymous
04/16/26(Thu)21:09:02 No.108617898

Anonymous 04/16/26(Thu)21:09:02 No.108617898▶

What's the point of arch_prctl when prctl exists and is already used for arch-specific stuff?
>>108617744
Like so: >>108570543

Anonymous
04/16/26(Thu)21:12:59 No.108617931

Anonymous 04/16/26(Thu)21:12:59 No.108617931▶

>>108617898 (You)
Also, prctl's documentation is terrible. The manpages don't cover a lot of the interesting ones.

Anonymous
04/16/26(Thu)21:22:20 No.108618007

Anonymous 04/16/26(Thu)21:22:20 No.108618007▶

>>108617638
>but theyre blue instead of green
https://www.youtube.com/watch?v=68ugkg9RePc

Anonymous
04/16/26(Thu)22:34:35 No.108618459

Anonymous 04/16/26(Thu)22:34:35 No.108618459▶

>PR_SET_ENDIAN
lolwut? This is possible? This would make tons of stuff much simpler

Anonymous
04/16/26(Thu)22:35:43 No.108618471

Anonymous 04/16/26(Thu)22:35:43 No.108618471▶

>>108618459
>PowerPC only.
>Terms and conditions may apply.

Anonymous
04/17/26(Fri)03:39:43 No.108620101

Anonymous 04/17/26(Fri)03:39:43 No.108620101▶

>>108618471
lol

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