MOVD	_cgo_sys_thread_create(SB), R12
	CMP	$0, R12
	BEQ	nocgo
	MOVD	$_rt0_ppc64le_linux_lib_go(SB), R3
	MOVD	$0, R4
	MOVD	R12, CTR
	BL	(CTR)
	BR	done

nocgo:
	MOVD	$0x800000, R12                     // stacksize = 8192KB
	MOVD	R12, 8+FIXED_FRAME(R1)
	MOVD	$_rt0_ppc64le_linux_lib_go(SB), R12
	MOVD	R12, 16+FIXED_FRAME(R1)
	MOVD	$runtime·newosproc0(SB),R12
	MOVD	R12, CTR
	BL	(CTR)

done:

	MOV	_cgo_sys_thread_create(SB), T0
	BEQZ	T0, nocgo
	MOV	$_rt0_riscv64_linux_lib_go(SB), A0
	MOV	$0, A1
	JALR	RA, T0
	JMP	restore

nocgo:
	MOV	$0x800000, A0                     // stacksize = 8192KB
	MOV	$_rt0_riscv64_linux_lib_go(SB), A1
	MOV	A0, 8(X2)
	MOV	A1, 16(X2)
	MOV	$runtime·newosproc0(SB), T0
	JALR	RA, T0

restore:
	// Restore callee-save registers, along with X1 (LR).

   *
   * <ul>
   *   <li>{@code getStackTrace} takes {@code stackSize} time to return but then negligible time to
   *       retrieve each element of the returned list.
   *   <li>{@code lazyStackTrace} takes negligible time to return but then {@code 1/stackSize} time
   *       to retrieve each element of the returned list (probably slightly more than {@code
   *       1/stackSize}).
   * </ul>
   *

	MOVD	$0, R4
	MOVD	R2, 40(R1)
	MOVD	8(R12), R2
	MOVD	(R12), R12
	MOVD	R12, CTR
	BL	(CTR)
	MOVD	40(R1), R2
	BR	done

nocgo:
	MOVD	$0x800000, R12					   // stacksize = 8192KB
	MOVD	R12, 8(R1)
	MOVD	$_rt0_ppc64_aix_lib_go(SB), R12
	MOVD	R12, 16(R1)
	MOVD	$runtime·newosproc0(SB),R12
	MOVD	R12, CTR
	BL	(CTR)

done:
	// Restore saved registers.
	MOVD	48(R1), R14

   *
   * <ul>
   *   <li>{@code getStackTrace} takes {@code stackSize} time to return but then negligible time to
   *       retrieve each element of the returned list.
   *   <li>{@code lazyStackTrace} takes negligible time to return but then {@code 1/stackSize} time
   *       to retrieve each element of the returned list (probably slightly more than {@code
   *       1/stackSize}).
   * </ul>
   *

// is initialized.
//
// This function is not safe to use after initialization as it does not pass an M as fnarg.
//
//go:nosplit
func newosproc0(stacksize uintptr, fn *funcDescriptor) {
	var (
		attr pthread_attr
		oset sigset
		tid  pthread
	)

	if pthread_attr_init(&attr) != 0 {
		writeErrStr(failthreadcreate)
		exit(1)
	}

	}
}

// Version of newosproc that doesn't require a valid G.
//
//go:nosplit
func newosproc0(stacksize uintptr, fn unsafe.Pointer) {
	stack := sysAlloc(stacksize, &memstats.stacks_sys)
	if stack == nil {
		writeErrStr(failallocatestack)
		exit(1)
	}
	ret := clone(cloneFlags, unsafe.Pointer(uintptr(stack)+stacksize), nil, nil, fn)
	if ret < 0 {
		writeErrStr(failthreadcreate)
		exit(1)
	}
}

const (

// profilez samples are a repeated sequence of stack frames of the
// form:
//
//	1st word -- The number of times this stack was encountered.
//	2nd word -- The size of the stack (StackSize).
//	3rd word -- The first address on the stack.
//	...
//	StackSize + 2 -- The last address on the stack
//
// The last stack trace is of the form:
//
//	1st word -- 0
//	2nd word -- 1
//	3rd word -- 0
//

	MOVQ	0(DI), DI		// arg 1 - attr
	CALL	libc_pthread_attr_destroy(SB)
	RET

TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
	MOVQ	8(DI), SI		// arg 2 - stacksize
	MOVQ	0(DI), DI		// arg 1 - attr
	CALL	libc_pthread_attr_getstacksize(SB)
	RET

TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
	MOVQ	8(DI), SI		// arg 2 - detachstate

	parentTID  uint64 // Where to store child TID, in parent's memory (pid_t *)
	exitSignal uint64 // Signal to deliver to parent on child termination
	stack      uint64 // Pointer to lowest byte of stack
	stackSize  uint64 // Size of stack
	tls        uint64 // Location of new TLS
	setTID     uint64 // Pointer to a pid_t array (since Linux 5.5)
	setTIDSize uint64 // Number of elements in set_tid (since Linux 5.5)