go-delve/delve · error

could not get floating point registers: %v

Error message

could not get floating point registers: %v

What it means

Error "could not get floating point registers: %v" thrown in go-delve/delve.

Source

Thrown at pkg/proc/native/threads_linux_arm64.go:22

	"debug/elf"
	"errors"
	"fmt"
	"syscall"
	"unsafe"

	sys "golang.org/x/sys/unix"

	"github.com/go-delve/delve/pkg/proc"
	"github.com/go-delve/delve/pkg/proc/linutil"
)

func (thread *nativeThread) fpRegisters() ([]proc.Register, []byte, error) {
	var err error
	var arm_fpregs linutil.ARM64PtraceFpRegs
	thread.dbp.execPtraceFunc(func() { arm_fpregs.Vregs, err = ptraceGetFpRegset(thread.ID) })
	fpregs := arm_fpregs.Decode()
	if err != nil {
		err = fmt.Errorf("could not get floating point registers: %v", err.Error())
	}
	return fpregs, arm_fpregs.Vregs, err
}

func (t *nativeThread) restoreRegisters(savedRegs proc.Registers) error {
	sr := savedRegs.(*linutil.ARM64Registers)

	var restoreRegistersErr error
	t.dbp.execPtraceFunc(func() {
		restoreRegistersErr = ptraceSetGRegs(t.ID, sr.Regs)
		if restoreRegistersErr != syscall.Errno(0) && restoreRegistersErr != nil {
			return
		}
		if sr.Fpregset != nil {
			iov := sys.Iovec{Base: &sr.Fpregset[0], Len: uint64(len(sr.Fpregset))}
			_, _, restoreRegistersErr = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_SETREGSET, uintptr(t.ID), uintptr(elf.NT_FPREGSET), uintptr(unsafe.Pointer(&iov)), 0, 0)
		}
	})

View on GitHub (pinned to a23773e6c3)

When it happens

Trigger: Thrown at pkg/proc/native/threads_linux_arm64.go:22 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of go-delve/delve@a23773e6c3 (2026-08-31). Data as JSON: /api/errors/726e106974f940de. Report an issue: GitHub.