| 1 | .global vfork |
| 2 | .type vfork,@function |
| 3 | vfork: |
| 4 | /* riscv does not have SYS_vfork, so we must use clone instead */ |
| 5 | /* note: riscv's clone = clone(flags, sp, ptidptr, tls, ctidptr) */ |
| 6 | li a7, 220 |
| 7 | li a0, 0x100 | 0x4000 | 17 /* flags = CLONE_VM | CLONE_VFORK | SIGCHLD */ |
| 8 | mv a1, sp |
| 9 | /* the other arguments are ignoreable */ |
| 10 | ecall |
| 11 | .hidden __syscall_ret |
| 12 | j __syscall_ret |