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Anonymous
syscall of the day: rt_sigretu(...) 01/18/26(Sun)13:08:25 No.107902152
File: 1768629403698389.png (48 KB, 2028x2842)
48 KB
48 KB PNG
syscall of the day: rt_sigreturn Anonymous 01/18/26(Sun)13:08:25 No.107902152
previous: >>107889612

#define __NR_rt_sigreturn        15

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

more signal stuff today! except this one tells us never to use it, lol
>sigreturn() exists only to allow the implementation of signal handlers.
>It should never be called directly.
there's really not a ton to say about this one. it just helps to implement the necessary signal trampoline to restore state after executing a signal handler. but i guess that alone is pretty interesting. related, and perhaps more interesting, is https://man7.org/linux/man-pages/man0/setjmp.h.0p.html

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/
>>
Anonymous
01/18/26(Sun)14:12:14 No.107902776
Anonymous 01/18/26(Sun)14:12:14 No.107902776
bampu
>>
Anonymous
01/18/26(Sun)14:13:54 No.107902792
Anonymous 01/18/26(Sun)14:13:54 No.107902792
>>107902152
is that cs_assaults ?
>>
Anonymous
01/18/26(Sun)16:00:43 No.107903884
Anonymous 01/18/26(Sun)16:00:43 No.107903884
>>107902792
no idea !
>>
Anonymous
01/18/26(Sun)17:21:15 No.107904619
Anonymous 01/18/26(Sun)17:21:15 No.107904619
>It should never be called directly.

Cool technique:
https://cr0mll.github.io/cyberclopaedia/Exploitation/Binary%20Exploitation/Stack%20Exploitation/Sigreturn-oriented%20Programming%20(SROP).html
>>
Anonymous
01/18/26(Sun)19:45:53 No.107905705
Anonymous 01/18/26(Sun)19:45:53 No.107905705
>>107902152
>sigreturn() exists only to allow the implementation of signal handlers.
>It should never be called directly.
What the FUCK is sigreturn()'s problem?
>>
Anonymous
01/18/26(Sun)19:50:21 No.107905739
Anonymous 01/18/26(Sun)19:50:21 No.107905739
>>107902152
Why is linux so weird and obtuse? Can't they release a new set of good syscalls and leave these ones to rot
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