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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
TEXT _rt0_arm_darwin(SB),7,$-4
// prepare arguments for main (_rt0_go)
MOVW (R13), R0 // argc
MOVW $4(R13), R1 // argv
MOVW $main(SB), R4
B (R4)
// When linking with -buildmode=c-archive or -buildmode=c-shared,
// this symbol is called from a global initialization function.
//
// Note that all currently shipping darwin/arm platforms require
// cgo and do not support c-shared.
TEXT _rt0_arm_darwin_lib(SB),NOSPLIT,$0
// R11 is REGTMP, reserved for liblink. It is used below to
// move R0/R1 into globals. However in the darwin ARMv7 calling
// convention, it is a callee-saved register. So we save it to a
// temporary register.
MOVW R11, R2
MOVW R0, _rt0_arm_darwin_lib_argc<>(SB)
MOVW R1, _rt0_arm_darwin_lib_argv<>(SB)
// Synchronous initialization.
MOVW $runtime·libpreinit(SB), R3
CALL (R3)
// Create a new thread to do the runtime initialization and return.
MOVW _cgo_sys_thread_create(SB), R3
CMP $0, R3
B.EQ nocgo
MOVW $_rt0_arm_darwin_lib_go(SB), R0
MOVW $0, R1
MOVW R2, R11
BL (R3)
RET
nocgo:
MOVW $0x400000, R0
MOVW R0, (R13) // stacksize
MOVW $_rt0_arm_darwin_lib_go(SB), R0
MOVW R0, 4(R13) // fn
MOVW $0, R0
MOVW R0, 8(R13) // fnarg
MOVW $runtime·newosproc0(SB), R3
MOVW R2, R11
BL (R3)
RET
TEXT _rt0_arm_darwin_lib_go(SB),NOSPLIT,$0
MOVW _rt0_arm_darwin_lib_argc<>(SB), R0
MOVW _rt0_arm_darwin_lib_argv<>(SB), R1
MOVW R0, (R13)
MOVW R1, 4(R13)
MOVW $runtime·rt0_go(SB), R4
B (R4)
DATA _rt0_arm_darwin_lib_argc<>(SB)/4, $0
GLOBL _rt0_arm_darwin_lib_argc<>(SB),NOPTR, $4
DATA _rt0_arm_darwin_lib_argv<>(SB)/4, $0
GLOBL _rt0_arm_darwin_lib_argv<>(SB),NOPTR, $4
TEXT main(SB),NOSPLIT,$-8
// save argc and argv onto stack
MOVM.DB.W [R0-R1], (R13)
MOVW $runtime·rt0_go(SB), R4
B (R4)
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