syscall.sh / riscv64 / semctl
semctl
System V semaphore control operations
sys_semctl(int semid, int semnum, int cmd, unsigned long arg)| number | 191 (0xbf) |
|---|---|
| abi | common |
| entry point | sys_semctl |
| since | Linux 4.15 |
| man page | semctl(2) |
| source | elixir.bootlin.com |
Registers
| register | value |
|---|---|
a7 | 191, the syscall number |
a0 | int semid |
a1 | int semnum |
a2 | int cmd |
a3 | unsigned long arg |
a0 | the return value |
Then run ecall to enter the kernel.
Same syscall on other architectures
- x64 66
- x86 394
- arm64 191
- arm 300
- x32 1073741890
- loongarch64 191
- ppc64 394
- ppc 394
- s390x 394
- mips64 5064
- mipsn32 6064
- mipso32 4394
- alpha 204
- arc 191
- csky 191
- hexagon 191
- m68k 394
- microblaze 328
- nios2 191
- openrisc 191
- parisc 187
- sh 394
- sparc 394
- sparc64 394
- xtensa 164
Get this as JSON: https://api.syscall.sh/v2/syscalls/riscv64/semctl