58762685e3
Adds the low-level support for watchpoints (aka data breakpoints) to the native linux/amd64 backend. Does not add user interface or functioning support for watchpoints on stack variables. Updates #279
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package native
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import (
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"debug/elf"
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"fmt"
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"syscall"
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"unsafe"
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sys "golang.org/x/sys/unix"
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"github.com/go-delve/delve/pkg/proc"
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"github.com/go-delve/delve/pkg/proc/linutil"
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)
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func (thread *nativeThread) fpRegisters() ([]proc.Register, []byte, error) {
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var err error
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var arm_fpregs linutil.ARM64PtraceFpRegs
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thread.dbp.execPtraceFunc(func() { arm_fpregs.Vregs, err = ptraceGetFpRegset(thread.ID) })
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fpregs := arm_fpregs.Decode()
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if err != nil {
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err = fmt.Errorf("could not get floating point registers: %v", err.Error())
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}
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return fpregs, arm_fpregs.Vregs, err
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}
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func (t *nativeThread) restoreRegisters(savedRegs proc.Registers) error {
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sr := savedRegs.(*linutil.ARM64Registers)
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var restoreRegistersErr error
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t.dbp.execPtraceFunc(func() {
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restoreRegistersErr = ptraceSetGRegs(t.ID, sr.Regs)
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if restoreRegistersErr != syscall.Errno(0) {
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return
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}
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if sr.Fpregset != nil {
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iov := sys.Iovec{Base: &sr.Fpregset[0], Len: uint64(len(sr.Fpregset))}
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_, _, restoreRegistersErr = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_SETREGSET, uintptr(t.ID), uintptr(elf.NT_FPREGSET), uintptr(unsafe.Pointer(&iov)), 0, 0)
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}
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})
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if restoreRegistersErr == syscall.Errno(0) {
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restoreRegistersErr = nil
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}
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return restoreRegistersErr
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}
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func (t *nativeThread) writeHardwareBreakpoint(addr uint64, wtype proc.WatchType, idx uint8) error {
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return proc.ErrHWBreakUnsupported
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}
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func (t *nativeThread) clearHardwareBreakpoint(addr uint64, wtype proc.WatchType, idx uint8) error {
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return proc.ErrHWBreakUnsupported
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}
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func (t *nativeThread) findHardwareBreakpoint() (*proc.Breakpoint, error) {
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return nil, nil
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}
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