图文详解Go程序如何编译并运行起来的

package main  
  
import "fmt"  
  
func main() {  
   fmt.Println("hello RdrB1te")  
}

go build -n

$env:GOSSAFUNC="main" # windows powershell
export GOSSAFUNC=main # linux
go build

go build -gcflags -S main.go

func main() {  
   fmt.Println("hello RdrB1te")  
}

TEXT _rt0_amd64_linux(SB),NOSPLIT,$-8
	JMP	_rt0_amd64(SB)

TEXT _rt0_amd64(SB),NOSPLIT,$-8  
   MOVQ   0(SP), DI  // argc  
   LEAQ   8(SP), SI  // argv  
   JMP    runtime·rt0_go(SB)

TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0  
   // copy arguments forward on an even stack  
   MOVQ   DI, AX    // argc  
   MOVQ   SI, BX    // argv  
   SUBQ   $(5*8), SP    // 3args 2auto  
   ANDQ   $~15, SP  
   MOVQ   AX, 24(SP)  
   MOVQ   BX, 32(SP)  
  
   // create istack out of the given (operating system) stack.  
   // _cgo_init may update stackguard.   MOVQ   $runtime·g0(SB), DI

	CALL	runtime·check(SB)

func check(){

}

CALL    runtime·check(SB)  
  
MOVL   24(SP), AX    // copy argc  
MOVL   AX, 0(SP)  
MOVQ   32(SP), AX    // copy argv  
MOVQ   AX, 8(SP)  
CALL   runtime·args(SB)  
CALL   runtime·osinit(SB)  
CALL   runtime·schedinit(SB)  
  
// create a new goroutine to start program  
MOVQ   $runtime·mainPC(SB), AX       // entry  
PUSHQ  AX  
CALL   runtime·newproc(SB)  
POPQ   AX

    // create a new goroutine to start program  
   MOVQ   $runtime·mainPC(SB), AX       // entry  
   PUSHQ  AX  
   CALL   runtime·newproc(SB)  
   POPQ   AX  
  
   // start this M  
   CALL   runtime·mstart(SB)  
  
   CALL   runtime·abort(SB)  // mstart should never return  
   RET  
  
// mainPC is a function value for runtime.main, to be passed to newproc.  
// The reference to runtime.main is made via ABIInternal, since the  
// actual function (not the ABI0 wrapper) is needed by newproc.  
DATA   runtime·mainPC+0(SB)/8,$runtime·main<ABIInternal>(SB)

// The main goroutine.
func main() {  
   doInit(&runtime_inittask) // 执行runtime包中的init方法
   gcenable() // 启动GC垃圾回收器
   doInit(&main_inittask) //执行用户包依赖的init方法
   fn := main_main // 执行用户主函数main.mian() 
   fn()
}

//go:linkname main_main main.main
func main_main()