github.com/afumu/libc@v0.0.6/musl/src/thread/riscv64/__unmapself.s (about)

     1  .global __unmapself
     2  .type __unmapself, %function
     3  __unmapself:
     4  	li a7, 215 # SYS_munmap
     5  	ecall
     6  	li a7, 93  # SYS_exit
     7  	ecall