// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: BSD-3-Clause

//go:build linux && arm64

package debug

import (
	"encoding/binary"
	"fmt"
)

func printRegs(regs *Regs, codeBase, funcOff uint64) {
	fmt.Printf("  PC  = %#016x  (func+%#x)\n", regs.PC, regs.PC-codeBase-funcOff)
	fmt.Printf("  SP  = %#016x  FP  = %#016x\n", regs.SP, regs.X29)
	fmt.Printf("  LR  = %#016x\n", regs.X30)
	fmt.Printf("  X0  = %#016x  X1  = %#016x\n", regs.X0, regs.X1)
	fmt.Printf("  X2  = %#016x  X3  = %#016x\n", regs.X2, regs.X3)
	fmt.Printf("  X4  = %#016x  X5  = %#016x\n", regs.X4, regs.X5)
	fmt.Printf("  X6  = %#016x  X7  = %#016x\n", regs.X6, regs.X7)
	fmt.Printf("  X8  = %#016x  X9  = %#016x\n", regs.X8, regs.X9)
	fmt.Printf("  X10 = %#016x  X11 = %#016x\n", regs.X10, regs.X11)
	fmt.Printf("  X12 = %#016x  X13 = %#016x\n", regs.X12, regs.X13)
	fmt.Printf("  X14 = %#016x  X15 = %#016x\n", regs.X14, regs.X15)
	fmt.Printf("  X16 = %#016x  X17 = %#016x\n", regs.X16, regs.X17)
	fmt.Printf("  X18 = %#016x  X19 = %#016x\n", regs.X18, regs.X19)
	fmt.Printf("  X20 = %#016x  X21 = %#016x\n", regs.X20, regs.X21)
	fmt.Printf("  X22 = %#016x  X23 = %#016x\n", regs.X22, regs.X23)
	fmt.Printf("  X24 = %#016x  X25 = %#016x\n", regs.X24, regs.X25)
	fmt.Printf("  X26 = %#016x  X27 = %#016x\n", regs.X26, regs.X27)
	fmt.Printf("  X28 = %#016x  PSTATE = %#x\n", regs.X28, regs.PSTATE)
}

func printVectorRegs(v *VectorRegs) {
	fmt.Println("\n  Vector registers (V0-V31):")
	for i := 0; i < 32; i += 2 {
		fmt.Printf("  V%-2d  = %016x%016x\n", i, binary.LittleEndian.Uint64(v.V[i][8:16]), binary.LittleEndian.Uint64(v.V[i][0:8]))
		fmt.Printf("  V%-2d  = %016x%016x\n", i+1, binary.LittleEndian.Uint64(v.V[i+1][8:16]), binary.LittleEndian.Uint64(v.V[i+1][0:8]))
	}
}

// archReturnAddr reads the return address from LR (arm64 convention).
func archReturnAddr(s *Session, regs *Regs) (uint64, error) {
	return regs.X30, nil
}

// archSPLabel returns the SP register name for display.
func archSPLabel() string { return "SP" }