88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
package native
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import (
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"fmt"
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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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// SetPC sets RIP to the value specified by 'pc'.
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func (thread *nativeThread) SetPC(pc uint64) error {
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ir, err := registers(thread, false)
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if err != nil {
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return err
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}
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r := ir.(*linutil.AMD64Registers)
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r.Regs.Rip = pc
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thread.dbp.execPtraceFunc(func() { err = sys.PtraceSetRegs(thread.ID, (*sys.PtraceRegs)(r.Regs)) })
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return err
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}
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// SetSP sets RSP to the value specified by 'sp'
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func (thread *nativeThread) SetSP(sp uint64) (err error) {
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var ir proc.Registers
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ir, err = registers(thread, false)
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if err != nil {
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return err
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}
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r := ir.(*linutil.AMD64Registers)
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r.Regs.Rsp = sp
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thread.dbp.execPtraceFunc(func() { err = sys.PtraceSetRegs(thread.ID, (*sys.PtraceRegs)(r.Regs)) })
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return
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}
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func (thread *nativeThread) SetDX(dx uint64) (err error) {
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var ir proc.Registers
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ir, err = registers(thread, false)
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if err != nil {
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return err
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}
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r := ir.(*linutil.AMD64Registers)
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r.Regs.Rdx = dx
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thread.dbp.execPtraceFunc(func() { err = sys.PtraceSetRegs(thread.ID, (*sys.PtraceRegs)(r.Regs)) })
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return
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}
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func registers(thread *nativeThread, floatingPoint bool) (proc.Registers, error) {
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var (
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regs linutil.AMD64PtraceRegs
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err error
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)
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thread.dbp.execPtraceFunc(func() { err = sys.PtraceGetRegs(thread.ID, (*sys.PtraceRegs)(®s)) })
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if err != nil {
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return nil, err
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}
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r := &linutil.AMD64Registers{Regs: ®s}
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if floatingPoint {
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var fpregset linutil.AMD64Xstate
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r.Fpregs, fpregset, err = thread.fpRegisters()
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r.Fpregset = &fpregset
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if err != nil {
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return nil, err
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}
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}
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return r, nil
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}
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const (
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_X86_XSTATE_MAX_SIZE = 2688
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_NT_X86_XSTATE = 0x202
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_XSAVE_HEADER_START = 512
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_XSAVE_HEADER_LEN = 64
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_XSAVE_EXTENDED_REGION_START = 576
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_XSAVE_SSE_REGION_LEN = 416
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)
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func (thread *nativeThread) fpRegisters() (regs []proc.Register, fpregs linutil.AMD64Xstate, err error) {
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thread.dbp.execPtraceFunc(func() { fpregs, err = ptraceGetRegset(thread.ID) })
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regs = 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
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}
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