setfsgid on ia32

set group identity used for filesystem checks

sys_setfsgid16(old_gid_t gid)
number139 (0x8b)
abii386
entry pointsys_setfsgid16
sinceLinux 3.3 or earlier (3.3 is the first release scanned for ia32)
man pagesetfsgid(2)
sourceelixir.bootlin.com

Registers

registervalue
eax139, the syscall number
ebxold_gid_t gid
eaxthe return value

Then run int 0x80 to enter the kernel.

This compat ABI is only available when the kernel is built with CONFIG_IA32_EMULATION.

Same syscall on other architectures

Get this as JSON: https://api.syscall.sh/v2/syscalls/ia32/setfsgid