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asterinas/docs/src/kernel/linux-compatibility.md
Yuke Peng 60ef523aaf Implement semctl syscall
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# Linux Compatibility
> "We don't break user space."
>
> --- Linus Torvalds
Asterinas is dedicated to maintaining compatibility with the Linux ABI,
ensuring that applications and administrative tools
designed for Linux can seamlessly operate within Asterinas.
While we prioritize compatibility,
it is important to note that Asterinas does not,
nor will it in the future,
support the loading of Linux kernel modules.
## System Calls
At the time of writing,
Asterinas implements more than 160 out of the 336 system calls
provided by Linux on x86-64 architecture.
| Numbers | Names | Is Implemented |
| ------- | ---------------- | --------------- |
| 0 | read | ✅ |
| 1 | write | ✅ |
| 2 | open | ✅ |
| 3 | close | ✅ |
| 4 | stat | ✅ |
| 5 | fstat | ✅ |
| 6 | lstat | ✅ |
| 7 | poll | ✅ |
| 8 | lseek | ✅ |
| 9 | mmap | ✅ |
| 10 | mprotect | ✅ |
| 11 | munmap | ✅ |
| 12 | brk | ✅ |
| 13 | rt_sigaction | ✅ |
| 14 | rt_sigprocmask | ✅ |
| 15 | rt_sigreturn | ✅ |
| 16 | ioctl | ✅ |
| 17 | pread64 | ✅ |
| 18 | pwrite64 | ✅ |
| 19 | readv | ✅ |
| 20 | writev | ✅ |
| 21 | access | ✅ |
| 22 | pipe | ✅ |
| 23 | select | ✅ |
| 24 | sched_yield | ✅ |
| 25 | mremap | ❌ |
| 26 | msync | ❌ |
| 27 | mincore | ❌ |
| 28 | madvise | ✅ |
| 29 | shmget | ❌ |
| 30 | shmat | ❌ |
| 31 | shmctl | ❌ |
| 32 | dup | ✅ |
| 33 | dup2 | ✅ |
| 34 | pause | ✅ |
| 35 | nanosleep | ✅ |
| 36 | getitimer | ✅ |
| 37 | alarm | ✅ |
| 38 | setitimer | ✅ |
| 39 | getpid | ✅ |
| 40 | sendfile | ✅ |
| 41 | socket | ✅ |
| 42 | connect | ✅ |
| 43 | accept | ✅ |
| 44 | sendto | ✅ |
| 45 | recvfrom | ✅ |
| 46 | sendmsg | ✅ |
| 47 | recvmsg | ✅ |
| 48 | shutdown | ✅ |
| 49 | bind | ✅ |
| 50 | listen | ✅ |
| 51 | getsockname | ✅ |
| 52 | getpeername | ✅ |
| 53 | socketpair | ✅ |
| 54 | setsockopt | ✅ |
| 55 | getsockopt | ✅ |
| 56 | clone | ✅ |
| 57 | fork | ✅ |
| 58 | vfork | ❌ |
| 59 | execve | ✅ |
| 60 | exit | ✅ |
| 61 | wait4 | ✅ |
| 62 | kill | ✅ |
| 63 | uname | ✅ |
| 64 | semget | ✅ |
| 65 | semop | ✅ |
| 66 | semctl | ✅ |
| 67 | shmdt | ❌ |
| 68 | msgget | ❌ |
| 69 | msgsnd | ❌ |
| 70 | msgrcv | ❌ |
| 71 | msgctl | ❌ |
| 72 | fcntl | ✅ |
| 73 | flock | ✅ |
| 74 | fsync | ✅ |
| 75 | fdatasync | ✅ |
| 76 | truncate | ✅ |
| 77 | ftruncate | ✅ |
| 78 | getdents | ✅ |
| 79 | getcwd | ✅ |
| 80 | chdir | ✅ |
| 81 | fchdir | ✅ |
| 82 | rename | ✅ |
| 83 | mkdir | ✅ |
| 84 | rmdir | ✅ |
| 85 | creat | ✅ |
| 86 | link | ✅ |
| 87 | unlink | ✅ |
| 88 | symlink | ✅ |
| 89 | readlink | ✅ |
| 90 | chmod | ✅ |
| 91 | fchmod | ✅ |
| 92 | chown | ✅ |
| 93 | fchown | ✅ |
| 94 | lchown | ✅ |
| 95 | umask | ✅ |
| 96 | gettimeofday | ✅ |
| 97 | getrlimit | ❌ |
| 98 | getrusage | ✅ |
| 99 | sysinfo | ❌ |
| 100 | times | ❌ |
| 101 | ptrace | ❌ |
| 102 | getuid | ✅ |
| 103 | syslog | ❌ |
| 104 | getgid | ✅ |
| 105 | setuid | ✅ |
| 106 | setgid | ✅ |
| 107 | geteuid | ✅ |
| 108 | getegid | ✅ |
| 109 | setpgid | ✅ |
| 110 | getppid | ✅ |
| 111 | getpgrp | ✅ |
| 112 | setsid | ✅ |
| 113 | setreuid | ✅ |
| 114 | setregid | ✅ |
| 115 | getgroups | ✅ |
| 116 | setgroups | ✅ |
| 117 | setresuid | ✅ |
| 118 | getresuid | ✅ |
| 119 | setresgid | ✅ |
| 120 | getresgid | ✅ |
| 121 | getpgid | ❌ |
| 122 | setfsuid | ✅ |
| 123 | setfsgid | ✅ |
| 124 | getsid | ✅ |
| 125 | capget | ✅ |
| 126 | capset | ✅ |
| 127 | rt_sigpending | ✅ |
| 128 | rt_sigtimedwait | ❌ |
| 129 | rt_sigqueueinfo | ❌ |
| 130 | rt_sigsuspend | ✅ |
| 131 | sigaltstack | ✅ |
| 132 | utime | ✅ |
| 133 | mknod | ✅ |
| 134 | uselib | ❌ |
| 135 | personality | ❌ |
| 136 | ustat | ❌ |
| 137 | statfs | ✅ |
| 138 | fstatfs | ✅ |
| 139 | sysfs | ❌ |
| 140 | getpriority | ✅ |
| 141 | setpriority | ✅ |
| 142 | sched_setparam | ❌ |
| 143 | sched_getparam | ❌ |
| 144 | sched_setscheduler | ❌ |
| 145 | sched_getscheduler | ❌ |
| 146 | sched_get_priority_max | ❌ |
| 147 | sched_get_priority_min | ❌ |
| 148 | sched_rr_get_interval | ❌ |
| 149 | mlock | ❌ |
| 150 | munlock | ❌ |
| 151 | mlockall | ❌ |
| 152 | munlockall | ❌ |
| 153 | vhangup | ❌ |
| 154 | modify_ldt | ❌ |
| 155 | pivot_root | ❌ |
| 156 | _sysctl | ❌ |
| 157 | prctl | ✅ |
| 158 | arch_prctl | ✅ |
| 159 | adjtimex | ❌ |
| 160 | setrlimit | ❌ |
| 161 | chroot | ✅ |
| 162 | sync | ✅ |
| 163 | acct | ❌ |
| 164 | settimeofday | ❌ |
| 165 | mount | ✅ |
| 166 | umount2 | ✅ |
| 167 | swapon | ❌ |
| 168 | swapoff | ❌ |
| 169 | reboot | ❌ |
| 170 | sethostname | ❌ |
| 171 | setdomainname | ❌ |
| 172 | iopl | ❌ |
| 173 | ioperm | ❌ |
| 174 | create_module | ❌ |
| 175 | init_module | ❌ |
| 176 | delete_module | ❌ |
| 177 | get_kernel_syms | ❌ |
| 178 | query_module | ❌ |
| 179 | quotactl | ❌ |
| 180 | nfsservctl | ❌ |
| 181 | getpmsg | ❌ |
| 182 | putpmsg | ❌ |
| 183 | afs_syscall | ❌ |
| 184 | tuxcall | ❌ |
| 185 | security | ❌ |
| 186 | gettid | ✅ |
| 187 | readahead | ❌ |
| 188 | setxattr | ❌ |
| 189 | lsetxattr | ❌ |
| 190 | fsetxattr | ❌ |
| 191 | getxattr | ❌ |
| 192 | lgetxattr | ❌ |
| 193 | fgetxattr | ❌ |
| 194 | listxattr | ❌ |
| 195 | llistxattr | ❌ |
| 196 | flistxattr | ❌ |
| 197 | removexattr | ❌ |
| 198 | lremovexattr | ❌ |
| 199 | fremovexattr | ❌ |
| 200 | tkill | ❌ |
| 201 | time | ✅ |
| 202 | futex | ✅ |
| 203 | sched_setaffinity | ❌ |
| 204 | sched_getaffinity | ✅ |
| 205 | set_thread_area | ❌ |
| 206 | io_setup | ❌ |
| 207 | io_destroy | ❌ |
| 208 | io_getevents | ❌ |
| 209 | io_submit | ❌ |
| 210 | io_cancel | ❌ |
| 211 | get_thread_area | ❌ |
| 212 | lookup_dcookie | ❌ |
| 213 | epoll_create | ✅ |
| 214 | epoll_ctl_old | ❌ |
| 215 | epoll_wait_old | ❌ |
| 216 | remap_file_pages | ❌ |
| 217 | getdents64 | ✅ |
| 218 | set_tid_address | ✅ |
| 219 | restart_syscall | ❌ |
| 220 | semtimedop | ✅ |
| 221 | fadvise64 | ❌ |
| 222 | timer_create | ✅ |
| 223 | timer_settime | ✅ |
| 224 | timer_gettime | ✅ |
| 225 | timer_getoverrun | ❌ |
| 226 | timer_delete | ✅ |
| 227 | clock_settime | ❌ |
| 228 | clock_gettime | ✅ |
| 229 | clock_getres | ❌ |
| 230 | clock_nanosleep | ✅ |
| 231 | exit_group | ✅ |
| 232 | epoll_wait | ✅ |
| 233 | epoll_ctl | ✅ |
| 234 | tgkill | ✅ |
| 235 | utimes | ✅ |
| 236 | vserver | ❌ |
| 237 | mbind | ❌ |
| 238 | set_mempolicy | ❌ |
| 239 | get_mempolicy | ❌ |
| 240 | mq_open | ❌ |
| 241 | mq_unlink | ❌ |
| 242 | mq_timedsend | ❌ |
| 243 | mq_timedreceive | ❌ |
| 244 | mq_notify | ❌ |
| 245 | mq_getsetattr | ❌ |
| 246 | kexec_load | ❌ |
| 247 | waitid | ✅ |
| 248 | add_key | ❌ |
| 249 | request_key | ❌ |
| 250 | keyctl | ❌ |
| 251 | ioprio_set | ❌ |
| 252 | ioprio_get | ❌ |
| 253 | inotify_init | ❌ |
| 254 | inotify_add_watch | ❌ |
| 255 | inotify_rm_watch | ❌ |
| 256 | migrate_pages | ❌ |
| 257 | openat | ✅ |
| 258 | mkdirat | ✅ |
| 259 | mknodat | ✅ |
| 260 | fchownat | ✅ |
| 261 | futimesat | ✅ |
| 262 | newfstatat | ✅ |
| 263 | unlinkat | ✅ |
| 264 | renameat | ✅ |
| 265 | linkat | ✅ |
| 266 | symlinkat | ✅ |
| 267 | readlinkat | ✅ |
| 268 | fchmodat | ✅ |
| 269 | faccessat | ✅ |
| 270 | pselect6 | ✅ |
| 271 | ppoll | ❌ |
| 272 | unshare | ❌ |
| 273 | set_robust_list | ✅ |
| 274 | get_robust_list | ❌ |
| 275 | splice | ❌ |
| 276 | tee | ❌ |
| 277 | sync_file_range | ❌ |
| 278 | vmsplice | ❌ |
| 279 | move_pages | ❌ |
| 280 | utimensat | ✅ |
| 281 | epoll_pwait | ✅ |
| 282 | signalfd | ❌ |
| 283 | timerfd_create | ❌ |
| 284 | eventfd | ✅ |
| 285 | fallocate | ✅ |
| 286 | timerfd_settime | ❌ |
| 287 | timerfd_gettime | ❌ |
| 288 | accept4 | ✅ |
| 289 | signalfd4 | ❌ |
| 290 | eventfd2 | ✅ |
| 291 | epoll_create1 | ✅ |
| 292 | dup3 | ✅ |
| 293 | pipe2 | ✅ |
| 294 | inotify_init1 | ❌ |
| 295 | preadv | ✅ |
| 296 | pwritev | ✅ |
| 297 | rt_tgsigqueueinfo | ❌ |
| 298 | perf_event_open | ❌ |
| 299 | recvmmsg | ❌ |
| 300 | fanotify_init | ❌ |
| 301 | fanotify_mark | ❌ |
| 302 | prlimit64 | ✅ |
| 303 | name_to_handle_at | ❌ |
| 304 | open_by_handle_at | ❌ |
| 305 | clock_adjtime | ❌ |
| 306 | syncfs | ❌ |
| 307 | sendmmsg | ❌ |
| 308 | setns | ❌ |
| 309 | getcpu | ❌ |
| 310 | process_vm_readv | ❌ |
| 311 | process_vm_writev | ❌ |
| 312 | kcmp | ❌ |
| 313 | finit_module | ❌ |
| 318 | getrandom | ✅ |
| 322 | execveat | ✅ |
| 327 | preadv2 | ✅ |
| 328 | pwritev2 | ✅ |
| 435 | clone3 | ✅ |
## File Systems
Here is the list of supported file systems:
* Devfs
* Devpts
* Ext2
* Procfs
* Ramfs
## Sockets
Here is the list of supported socket types:
* TCP sockets over IPv4
* UDP sockets over IPv4
* Unix sockets
## vDSO
Here is the list of supported symbols in vDSO:
* `__vdso_clock_gettime`
* `__vdso_gettimeofday`
* `__vdso_time`
## Boot Protocols
Here is the list of supported boot protocols:
* [Multiboot](https://www.gnu.org/software/grub/manual/multiboot/multiboot.html)
* [Multiboot2](https://www.gnu.org/software/grub/manual/multiboot2/multiboot.html)
* [Linux 32-bit boot protocol](https://www.kernel.org/doc/html/v5.4/x86/boot.html#bit-boot-protocol)
* [Linux EFI handover](https://www.kernel.org/doc/html/v5.4/x86/boot.html#efi-handover-protocol)
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