gdb -p 1

Attaching to process 1
Reading symbols from /bin/busybox...
(No debugging symbols found in /bin/busybox)
Reading symbols from /lib/ld-musl-aarch64.so.1...
Reading symbols from /usr/lib/debug//lib/ld-musl-aarch64.so.1.debug...
__syscall_cp_asm () at src/thread/aarch64/syscall_cp.s:28

warning: 28	src/thread/aarch64/syscall_cp.s: No such file or directory

call dup2

See also

• gdb