feat(debug): multi-architecture debugger support for arm64, riscv64, loong64

Assisted-by: MiMo V2.5 Pro

debug/stopinfo_linux_amd64.go

@@ -5,69 +5,7 @@
 
 package debug
 
-import (
-	"fmt"
-	"syscall"
-	"unsafe"
-)
-
-// StopReason describes why the debuggee stopped.
-type StopReason int
-
-const (
-	StopNone       StopReason = iota
-	StopBreakpoint            // INT3 breakpoint hit
-	StopWatchpoint            // hardware watchpoint triggered
-	StopSingleStep            // single-step completed
-	StopSignal                // stopped by a signal
-	StopExited                // process exited
-)
-
-// siginfo_t layout (Linux amd64): si_signo, si_errno, si_code, then union.
-type siginfoT struct {
-	SiSigno int32
-	SiErrno int32
-	SiCode  int32
-	_pad    [125]byte
-}
-
-const (
-	trapBRKPT   = 1 // INT3 breakpoint
-	trapHWBRKPT = 4 // hardware watchpoint
-)
-
-// StopInfo returns the reason the debuggee stopped and the faulting address
-// (for watchpoints, the watched address that was accessed).
-func (s *Session) StopInfo() (StopReason, uint64) {
-	if s.exited {
-		return StopExited, 0
-	}
-	var info siginfoT
-	_, _, errno := syscall.Syscall6(
-		syscall.SYS_PTRACE,
-		uintptr(syscall.PTRACE_GETSIGINFO),
-		uintptr(s.pid),
-		0,
-		uintptr(unsafe.Pointer(&info)),
-		0, 0,
-	)
-	if errno != 0 {
-		return StopNone, 0
-	}
-	if info.SiSigno != int32(syscall.SIGTRAP) {
-		return StopSignal, uint64(info.SiCode)
-	}
-	switch info.SiCode {
-	case trapBRKPT:
-		return StopBreakpoint, 0
-	case trapHWBRKPT:
-		// The faulting address is in si_addr (offset 16 in siginfo_t on amd64).
-		addr := *(*uint64)(unsafe.Pointer(uintptr(unsafe.Pointer(&info)) + 16))
-		return StopWatchpoint, addr
-	default:
-		return StopSingleStep, 0
-	}
-}
+import "fmt"
 
 // SetReg modifies a register value in the debuggee.
 func (s *Session) SetReg(name string, value uint64) error {