DATA _rt0_arm_lib_argv<>(SB)/4,$0
GLOBL _rt0_arm_lib_argv<>(SB),NOPTR,$4

// using NOFRAME means do not save LR on stack.
// argc is in R0, argv is in R1.
TEXT runtime·rt0_go(SB),NOSPLIT|NOFRAME|TOPFRAME,$0
	MOVW	$0xcafebabe, R12

	// copy arguments forward on an even stack
	// use R13 instead of SP to avoid linker rewriting the offsets
	SUB	$64, R13		// plenty of scratch
	AND	$~7, R13

	MOVW	sig+8(FP), R4
	MOVV	info+16(FP), R5
	MOVV	ctx+24(FP), R6
	MOVV	fn+0(FP), R25		// Must use R25, needed for PIC code.
	CALL	(R25)
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$192
	// initialize REGSB = PC&0xffffffff00000000
	BGEZAL	R0, 1(PC)
	SRLV	$32, R31, RSB
	SLLV	$32, RSB

	// this might be called in external code context,
	// where g is not set.

TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
	MOVW	sig+8(FP), R0
	MOVD	info+16(FP), R1
	MOVD	ctx+24(FP), R2
	MOVD	fn+0(FP), R11
	BL	(R11)
	RET

// func sigtramp()
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$176
	// Save callee-save registers in the case of signal forwarding.
	// Please refer to https://golang.org/issue/31827 .
	SAVE_R19_TO_R28(8*4)
	SAVE_F8_TO_F15(8*14)

	MOVW	fn+0(FP), R25
	MOVW	R29, R22
	SUBU	$16, R29
	AND	$~7, R29	// shadow space for 4 args aligned to 8 bytes as per O32 ABI
	JAL	(R25)
	MOVW	R22, R29
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$12
	// this might be called in external code context,
	// where g is not set.
	MOVB	runtime·iscgo(SB), R1
	BEQ	R1, 2(PC)
	JAL	runtime·load_g(SB)

	MOVW	R4, 4(R29)
	MOVW	R5, 8(R29)
	MOVW	R6, 12(R29)

	RET

TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
	MOVW	sig+8(FP), R4
	MOVV	info+16(FP), R5
	MOVV	ctx+24(FP), R6
	MOVV	fn+0(FP), R25
	JAL	(R25)
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$64
	// initialize REGSB = PC&0xffffffff00000000
	BGEZAL	R0, 1(PC)
	SRLV	$32, R31, RSB
	SLLV	$32, RSB

	// this might be called in external code context,
	// where g is not set.

	JMP	runtime·rt0_go(SB)

DATA _rt0_386_lib_argc<>(SB)/4, $0
GLOBL _rt0_386_lib_argc<>(SB),NOPTR, $4
DATA _rt0_386_lib_argv<>(SB)/4, $0
GLOBL _rt0_386_lib_argv<>(SB),NOPTR, $4

TEXT runtime·rt0_go(SB),NOSPLIT|NOFRAME|TOPFRAME,$0
	// Copy arguments forward on an even stack.
	// Users of this function jump to it, they don't call it.
	MOVL	0(SP), AX
	MOVL	4(SP), BX
	SUBL	$128, SP		// plenty of scratch
	ANDL	$~15, SP

	RET

TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
	MOVW	sig+8(FP), R2
	MOVD	info+16(FP), R3
	MOVD	ctx+24(FP), R4
	MOVD	fn+0(FP), R5
	BL	R5
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$64
	// initialize essential registers (just in case)
	XOR	R0, R0

	// this might be called in external code context,
	// where g is not set.
	MOVB	runtime·iscgo(SB), R6
	CMPBEQ	R6, $0, 2(PC)

	MOVW	sig+8(FP), A0
	MOV	info+16(FP), A1
	MOV	ctx+24(FP), A2
	MOV	fn+0(FP), T1
	JALR	RA, T1
	RET

// func sigtramp(signo, ureg, ctxt unsafe.Pointer)
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$64
	MOVW	A0, 8(X2)
	MOV	A1, 16(X2)
	MOV	A2, 24(X2)

	// this might be called in external code context,
	// where g is not set.
	MOVBU	runtime·iscgo(SB), A0
	BEQ	A0, ZERO, 2(PC)

	MOVW	sig+8(FP), R3
	MOVD	info+16(FP), R4
	MOVD	ctx+24(FP), R5
	MOVD	fn+0(FP), R12
	MOVD	R12, CTR
	CALL	(CTR)			// Alignment for ELF ABI?
	RET

TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$16
	// Go relies on R0 being $0 and we may have been executing non-Go code.
	XOR	R0, R0

	// TODO(jsing): Save callee-save registers (R2, R14-R31, F14-F31).
	// in the case of signal forwarding.

#include "go_tls.h"
#include "funcdata.h"
#include "textflag.h"
#include "asm_ppc64x.h"

#ifdef GOOS_aix
#define cgoCalleeStackSize 48
#else
#define cgoCalleeStackSize 32
#endif

TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0
	// R1 = stack; R3 = argc; R4 = argv; R13 = C TLS base pointer

	// initialize essential registers
	BL	runtime·reginit(SB)

	SUB	$(FIXED_FRAME+16), R1