Put the syscall number in register a7, the first argument in a0, second argument in a1 and so on. Look in the manual pages for the syscalls to see what the arguments are.
This code calls exit(0).
li a7, 93
li a0, 0
ecall
| Dec | Hex | Name |
|---|---|---|
| 0 | 0 | io_setup |
| 1 | 1 | io_destroy |
| 2 | 2 | io_submit |
| 3 | 3 | io_cancel |
| 4 | 4 | io_getevents |
| 5 | 5 | setxattr |
| 6 | 6 | lsetxattr |
| 7 | 7 | fsetxattr |
| 8 | 8 | getxattr |
| 9 | 9 | lgetxattr |
| 10 | A | fgetxattr |
| 11 | B | listxattr |
| 12 | C | llistxattr |
| 13 | D | flistxattr |
| 14 | E | removexattr |
| 15 | F | lremovexattr |
| 16 | 10 | fremovexattr |
| 17 | 11 | getcwd |
| 18 | 12 | lookup_dcookie |
| 19 | 13 | eventfd2 |
| 20 | 14 | epoll_create1 |
| 21 | 15 | epoll_ctl |
| 22 | 16 | epoll_pwait |
| 23 | 17 | dup |
| 24 | 18 | dup3 |
| 25 | 19 | fcntl |
| 26 | 1A | inotify_init1 |
| 27 | 1B | inotify_add_watch |
| 28 | 1C | inotify_rm_watch |
| 29 | 1D | ioctl |
| 30 | 1E | ioprio_set |
| 31 | 1F | ioprio_get |
| 32 | 20 | flock |
| 33 | 21 | mknodat |
| 34 | 22 | mkdirat |
| 35 | 23 | unlinkat |
| 36 | 24 | symlinkat |
| 37 | 25 | linkat |
| 38 | 26 | renameat |
| 39 | 27 | umount2 |
| 40 | 28 | mount |
| 41 | 29 | pivot_root |
| 42 | 2A | nfsservctl |
| 43 | 2B | statfs |
| 44 | 2C | fstatfs |
| 45 | 2D | truncate |
| 46 | 2E | ftruncate |
| 47 | 2F | fallocate |
| 48 | 30 | faccessat |
| 49 | 31 | chdir |
| 50 | 32 | fchdir |
| 51 | 33 | chroot |
| 52 | 34 | fchmod |
| 53 | 35 | fchmodat |
| 54 | 36 | fchownat |
| 55 | 37 | fchown |
| 56 | 38 | openat |
| 57 | 39 | close |
| 58 | 3A | vhangup |
| 59 | 3B | pipe2 |
| 60 | 3C | quotactl |
| 61 | 3D | getdents64 |
| 62 | 3E | lseek |
| 63 | 3F | read |
| 64 | 40 | write |
| 65 | 41 | readv |
| 66 | 42 | writev |
| 67 | 43 | pread64 |
| 68 | 44 | pwrite64 |
| 69 | 45 | preadv |
| 70 | 46 | pwritev |
| 71 | 47 | sendfile |
| 72 | 48 | pselect6 |
| 73 | 49 | ppoll |
| 74 | 4A | signalfd4 |
| 75 | 4B | vmsplice |
| 76 | 4C | splice |
| 77 | 4D | tee |
| 78 | 4E | readlinkat |
| 79 | 4F | newfstatat |
| 80 | 50 | fstat |
| 81 | 51 | sync |
| 82 | 52 | fsync |
| 83 | 53 | fdatasync |
| 84 | 54 | sync_file_range |
| 85 | 55 | timerfd_create |
| 86 | 56 | timerfd_settime |
| 87 | 57 | timerfd_gettime |
| 88 | 58 | utimensat |
| 89 | 59 | acct |
| 90 | 5A | capget |
| 91 | 5B | capset |
| 92 | 5C | personality |
| 93 | 5D | exit |
| 94 | 5E | exit_group |
| 95 | 5F | waitid |
| 96 | 60 | set_tid_address |
| 97 | 61 | unshare |
| 98 | 62 | futex |
| 99 | 63 | set_robust_list |
| 100 | 64 | get_robust_list |
| 101 | 65 | nanosleep |
| 102 | 66 | getitimer |
| 103 | 67 | setitimer |
| 104 | 68 | kexec_load |
| 105 | 69 | init_module |
| 106 | 6A | delete_module |
| 107 | 6B | timer_create |
| 108 | 6C | timer_gettime |
| 109 | 6D | timer_getoverrun |
| 110 | 6E | timer_settime |
| 111 | 6F | timer_delete |
| 112 | 70 | clock_settime |
| 113 | 71 | clock_gettime |
| 114 | 72 | clock_getres |
| 115 | 73 | clock_nanosleep |
| 116 | 74 | syslog |
| 117 | 75 | ptrace |
| 118 | 76 | sched_setparam |
| 119 | 77 | sched_setscheduler |
| 120 | 78 | sched_getscheduler |
| 121 | 79 | sched_getparam |
| 122 | 7A | sched_setaffinity |
| 123 | 7B | sched_getaffinity |
| 124 | 7C | sched_yield |
| 125 | 7D | sched_get_priority_max |
| 126 | 7E | sched_get_priority_min |
| 127 | 7F | sched_rr_get_interval |
| 128 | 80 | restart_syscall |
| 129 | 81 | kill |
| 130 | 82 | tkill |
| 131 | 83 | tgkill |
| 132 | 84 | sigaltstack |
| 133 | 85 | rt_sigsuspend |
| 134 | 86 | rt_sigaction |
| 135 | 87 | rt_sigprocmask |
| 136 | 88 | rt_sigpending |
| 137 | 89 | rt_sigtimedwait |
| 138 | 8A | rt_sigqueueinfo |
| 139 | 8B | rt_sigreturn |
| 140 | 8C | setpriority |
| 141 | 8D | getpriority |
| 142 | 8E | reboot |
| 143 | 8F | setregid |
| 144 | 90 | setgid |
| 145 | 91 | setreuid |
| 146 | 92 | setuid |
| 147 | 93 | setresuid |
| 148 | 94 | getresuid |
| 149 | 95 | setresgid |
| 150 | 96 | getresgid |
| 151 | 97 | setfsuid |
| 152 | 98 | setfsgid |
| 153 | 99 | times |
| 154 | 9A | setpgid |
| 155 | 9B | getpgid |
| 156 | 9C | getsid |
| 157 | 9D | setsid |
| 158 | 9E | getgroups |
| 159 | 9F | setgroups |
| 160 | A0 | uname |
| 161 | A1 | sethostname |
| 162 | A2 | setdomainname |
| 163 | A3 | getrlimit |
| 164 | A4 | setrlimit |
| 165 | A5 | getrusage |
| 166 | A6 | umask |
| 167 | A7 | prctl |
| 168 | A8 | getcpu |
| 169 | A9 | gettimeofday |
| 170 | AA | settimeofday |
| 171 | AB | adjtimex |
| 172 | AC | getpid |
| 173 | AD | getppid |
| 174 | AE | getuid |
| 175 | AF | geteuid |
| 176 | B0 | getgid |
| 177 | B1 | getegid |
| 178 | B2 | gettid |
| 179 | B3 | sysinfo |
| 180 | B4 | mq_open |
| 181 | B5 | mq_unlink |
| 182 | B6 | mq_timedsend |
| 183 | B7 | mq_timedreceive |
| 184 | B8 | mq_notify |
| 185 | B9 | mq_getsetattr |
| 186 | BA | msgget |
| 187 | BB | msgctl |
| 188 | BC | msgrcv |
| 189 | BD | msgsnd |
| 190 | BE | semget |
| 191 | BF | semctl |
| 192 | C0 | semtimedop |
| 193 | C1 | semop |
| 194 | C2 | shmget |
| 195 | C3 | shmctl |
| 196 | C4 | shmat |
| 197 | C5 | shmdt |
| 198 | C6 | socket |
| 199 | C7 | socketpair |
| 200 | C8 | bind |
| 201 | C9 | listen |
| 202 | CA | accept |
| 203 | CB | connect |
| 204 | CC | getsockname |
| 205 | CD | getpeername |
| 206 | CE | sendto |
| 207 | CF | recvfrom |
| 208 | D0 | setsockopt |
| 209 | D1 | getsockopt |
| 210 | D2 | shutdown |
| 211 | D3 | sendmsg |
| 212 | D4 | recvmsg |
| 213 | D5 | readahead |
| 214 | D6 | brk |
| 215 | D7 | munmap |
| 216 | D8 | mremap |
| 217 | D9 | add_key |
| 218 | DA | request_key |
| 219 | DB | keyctl |
| 220 | DC | clone |
| 221 | DD | execve |
| 222 | DE | mmap |
| 223 | DF | fadvise64 |
| 224 | E0 | swapon |
| 225 | E1 | swapoff |
| 226 | E2 | mprotect |
| 227 | E3 | msync |
| 228 | E4 | mlock |
| 229 | E5 | munlock |
| 230 | E6 | mlockall |
| 231 | E7 | munlockall |
| 232 | E8 | mincore |
| 233 | E9 | madvise |
| 234 | EA | remap_file_pages |
| 235 | EB | mbind |
| 236 | EC | get_mempolicy |
| 237 | ED | set_mempolicy |
| 238 | EE | migrate_pages |
| 239 | EF | move_pages |
| 240 | F0 | rt_tgsigqueueinfo |
| 241 | F1 | perf_event_open |
| 242 | F2 | accept4 |
| 243 | F3 | recvmmsg |
| 260 | 104 | wait4 |
| 261 | 105 | prlimit64 |
| 262 | 106 | fanotify_init |
| 263 | 107 | fanotify_mark |
| 264 | 108 | name_to_handle_at |
| 265 | 109 | open_by_handle_at |
| 266 | 10A | clock_adjtime |
| 267 | 10B | syncfs |
| 268 | 10C | setns |
| 269 | 10D | sendmmsg |
| 270 | 10E | process_vm_readv |
| 271 | 10F | process_vm_writev |
| 272 | 110 | kcmp |
| 273 | 111 | finit_module |
| 274 | 112 | sched_setattr |
| 275 | 113 | sched_getattr |
| 276 | 114 | renameat2 |
| 277 | 115 | seccomp |
| 278 | 116 | getrandom |
| 279 | 117 | memfd_create |
| 280 | 118 | bpf |
| 281 | 119 | execveat |
| 282 | 11A | userfaultfd |
| 283 | 11B | membarrier |
| 284 | 11C | mlock2 |
| 285 | 11D | copy_file_range |
| 286 | 11E | preadv2 |
| 287 | 11F | pwritev2 |
| 288 | 120 | pkey_mprotect |
| 289 | 121 | pkey_alloc |
| 290 | 122 | pkey_free |
| 291 | 123 | statx |
| 292 | 124 | io_pgetevents |
| 293 | 125 | rseq |
| 294 | 126 | kexec_file_load |