86 lines
1.8 KiB
Go
86 lines
1.8 KiB
Go
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// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build linux && arm64
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package debug
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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// GetRegs reads the general-purpose registers of the stopped debuggee.
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func (s *Session) GetRegs() (Regs, error) {
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var regs Regs
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_, _, errno := syscall.Syscall6(
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syscall.SYS_PTRACE,
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uintptr(syscall.PTRACE_GETREGS),
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uintptr(s.pid),
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0,
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uintptr(unsafe.Pointer(®s)),
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0, 0,
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)
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if errno != 0 {
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return regs, fmt.Errorf("debug: PTRACE_GETREGS: %w", errno)
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}
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return regs, nil
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}
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// SetRegs writes the general-purpose registers of the stopped debuggee.
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func (s *Session) SetRegs(regs *Regs) error {
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_, _, errno := syscall.Syscall6(
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syscall.SYS_PTRACE,
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uintptr(syscall.PTRACE_SETREGS),
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uintptr(s.pid),
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0,
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uintptr(unsafe.Pointer(regs)),
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0, 0,
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)
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if errno != 0 {
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return fmt.Errorf("debug: PTRACE_SETREGS: %w", errno)
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}
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return nil
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}
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// FPRegs holds the NEON/FP register state (V0-V31, FPCR, FPSR).
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type FPRegs struct {
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V [32][16]byte // V0-V31 (128-bit NEON/FP registers)
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FPCR uint32
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FPSR uint32
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}
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// GetFPRegs retrieves the NEON/FP register state.
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func (s *Session) GetFPRegs() (FPRegs, error) {
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var fp FPRegs
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_, _, errno := syscall.Syscall6(
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syscall.SYS_PTRACE,
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uintptr(syscall.PTRACE_GETFPREGS),
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uintptr(s.pid),
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0,
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uintptr(unsafe.Pointer(&fp)),
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0, 0,
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)
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if errno != 0 {
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return fp, fmt.Errorf("debug: PTRACE_GETFPREGS: %w", errno)
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}
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return fp, nil
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}
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// VectorRegs holds the full SIMD register state.
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type VectorRegs struct {
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V [32][16]byte // V0-V31 (128-bit)
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}
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// GetVectorRegs retrieves the SIMD registers.
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func (s *Session) GetVectorRegs() (VectorRegs, error) {
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var v VectorRegs
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fp, err := s.GetFPRegs()
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if err != nil {
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return v, err
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}
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copy(v.V[:][:], fp.V[:][:])
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return v, nil
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}
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