//go:build linux && (mips || mips64)

package unix

import "unsafe"

// PtraceRegsMips is the registers used by mips binaries.
type PtraceRegsMips struct {
	Regs     [32]uint64
	Lo       uint64
	Hi       uint64
	Epc      uint64
	Badvaddr uint64
	Status   uint64
	Cause    uint64
}

// PtraceGetRegsMips fetches the registers used by mips binaries.
func PtraceGetRegsMips(pid int, regsout *PtraceRegsMips) error {

package unix

import "unsafe"

// PtraceRegsArm is the registers used by arm binaries.
type PtraceRegsArm struct {
	Uregs [18]uint32
}

// PtraceGetRegsArm fetches the registers used by arm binaries.
func PtraceGetRegsArm(pid int, regsout *PtraceRegsArm) error {
	return ptracePtr(PTRACE_GETREGS, pid, 0, unsafe.Pointer(regsout))
}

// PtraceSetRegsArm sets the registers used by arm binaries.

//go:build linux && (mipsle || mips64le)

package unix

import "unsafe"

// PtraceRegsMipsle is the registers used by mipsle binaries.
type PtraceRegsMipsle struct {
	Regs     [32]uint64
	Lo       uint64
	Hi       uint64
	Epc      uint64
	Badvaddr uint64
	Status   uint64
	Cause    uint64
}

// PtraceGetRegsMipsle fetches the registers used by mipsle binaries.
func PtraceGetRegsMipsle(pid int, regsout *PtraceRegsMipsle) error {

	// IntArgRegs is the number of registers dedicated
	// to passing integer argument values. Result registers are identical
	// to argument registers, so this number is used for those too.
	IntArgRegs = 0

	// FloatArgRegs is the number of registers dedicated
	// to passing floating-point argument values. Result registers are
	// identical to argument registers, so this number is used for
	// those too.
	FloatArgRegs = 0

	Xcs      int32
	Eflags   int32
	Esp      int32
	Xss      int32
}

// PtraceGetRegs386 fetches the registers used by 386 binaries.
func PtraceGetRegs386(pid int, regsout *PtraceRegs386) error {
	return ptracePtr(PTRACE_GETREGS, pid, 0, unsafe.Pointer(regsout))
}

// PtraceSetRegs386 sets the registers used by 386 binaries.
func PtraceSetRegs386(pid int, regs *PtraceRegs386) error {

	// Apparently, the signal handling code path in darwin kernel leaves
	// the upper bits of Y registers in a dirty state, which causes
	// many SSE operations (128-bit and narrower) become much slower.
	// Clear the upper bits to get to a clean state. See issue #37174.
	// It is safe here as Go code don't use the upper bits of Y registers.
	p("#ifdef GOOS_darwin")
	p("#ifndef hasAVX")

	// TODO: This is only used for debug printing. Maybe export config.registers?
	gcRegMapSize := int16(0)
	for _, r := range c.registers {
		if r.gcNum+1 > gcRegMapSize {
			gcRegMapSize = r.gcNum + 1
		}
	}
	c.GCRegMap = make([]*Register, gcRegMapSize)
	for i, r := range c.registers {
		if r.gcNum != -1 {
			c.GCRegMap[r.gcNum] = &c.registers[i]
		}
	}

	return c
}

func (s *regAllocState) init(f *Func) {
	s.f = f
	s.f.RegAlloc = s.f.Cache.locs[:0]
	s.registers = f.Config.registers
	if nr := len(s.registers); nr == 0 || nr > int(noRegister) || nr > int(unsafe.Sizeof(regMask(0))*8) {
		s.f.Fatalf("bad number of registers: %d", nr)
	} else {
		s.numRegs = register(nr)
	}
	// Locate SP, SB, and g registers.
	s.SPReg = noRegister
	s.SBReg = noRegister
	s.GReg = noRegister

	} else {
		state.currentState.slots = state.currentState.slots[:numSlots]
	}
	if cap(state.currentState.registers) < len(state.registers) {
		state.currentState.registers = make([][]SlotID, len(state.registers))
	} else {
		state.currentState.registers = state.currentState.registers[:len(state.registers)]
	}

	// A relatively small slice, but used many times as the return from processValue.

	ctxt.set_pc(ctxt.pc() + 4)
}

// case 16
func (h *debugCallHandler) restoreSigContext(ctxt *sigctxt) {
	// Restore all registers except for pc and sp
	pc, sp := ctxt.pc(), ctxt.sp()
	*ctxt.cregs() = h.sigCtxt.savedRegs
	ctxt.set_pc(pc + 4)
	ctxt.set_sp(sp)
}

// storeRegArgs sets up argument registers in the signal
// context state from an abi.RegArgs.
//
// Both src and dst must be non-nil.