got unknown stack while capturing go binary exit point with bpftrace

Question

I want to practice bpftrace tracing go program exit point, such as, runtime.gopanic and os.Exit, but I'm confused with the result:

[root@localhost trace-go-func]# bpftrace -c "./binary -mode exit -code 2" trace.bt
Attaching 2 probes...
mode=exit, ecode=2
syscall.Exit(2) called with stack: 
        458080 0x458080 ([unknown])
        487f9e 0x487f9e ([unknown])
        487ee6 0x487ee6 ([unknown])
        433192 0x433192 ([unknown])
        45ba81 0x45ba81 ([unknown])

[root@localhost trace-go-func]# bpftrace -c "./binary -mode panic" trace.bt
Attaching 2 probes...
mode=panic, ecode=0
panic called with stack 
        430280 runtime.gopanic+0 (/root/projects/trace-go-func/binary)
        487f05 main.main+293 (/root/projects/trace-go-func/binary)
        433192 runtime.main+530 (/root/projects/trace-go-func/binary)
        45ba81 runtime.goexit.abi0+1 (/root/projects/trace-go-func/binary)
panic: doPanic

goroutine 1 [running]:
main.doPanic()
        /root/projects/trace-go-func/main.go:31 +0x27
main.main()
        /root/projects/trace-go-func/main.go:22 +0x125

panic works well, but os.Exit could not get stack correctly. I have found symbols with addresses in nm like this, for x in 458080 487f9e 487ee6; do nm ./binary | grep $x; done, but only got:

I'm confused now, why bpftrace could get the address and symbols while runtime.gopanic but os.Exit, and even could not matched in nm?

Here's my go source code main.go and trace.bt

package main

import (
    "flag"
    "fmt"
    "os"
)

var (
    mode = flag.String("mode", "exit", "choose mode to run and test")
    code = flag.Int("code", 0, "os.Exit code")
)

func main() {
    flag.Parse()
    fmt.Printf("mode=%s, ecode=%d\n", *mode, *code)

    // defer fmt.Println("main quit")

    switch *mode {
    case "panic":
        doPanic()
    case "exit":
        doOSExit(*code)
    }
}

//go:noinline
func doPanic() {
    // fmt.Println("panic calling")
    panic("doPanic")
}

//go:noinline
func doOSExit(code int) (x int) {
    // fmt.Println("os.Exit calling")
    os.Exit(code)
    for ; x < code; x++ {
    }
    return x
}

uprobe:./binary:runtime.gopanic
{
    printf("panic called with stack %s", ustack(perf));
}

uprobe:./binary:syscall.Exit
{
    printf("syscall.Exit(%d) called with stack: %s", sarg0, ustack(perf));
}

Core	Version
OS	centos7
Kernel	5.4.188-1.el7.elrepo.x86_64
bpftrace	v0.13.0
go	1.18