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go/src/runtime/rt0_darwin_arm.s

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runtime: darwin/arm support Change-Id: I63110daad2d62ae72ab1f33a40464d76e6205627 Reviewed-on: https://go-review.googlesource.com/2121 Reviewed-by: David Crawshaw <crawshaw@golang.org>
2014-12-25 23:07:10 -07:00
// 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)
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
// 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.
runtime: preserve R11 in darwin/arm entrypoint The _rt0_arm_darwin_lib entrypoint has to conform to the darwin ARMv7 calling convention, which requires functions to preserve the value of R11. Go uses R11 as the liblink REGTMP register, so save it manually. Also avoid using R4, which is also callee-save. Fixes #12590 Change-Id: I9c3b374e330f81ff8fc9c01fa20505a33ddcf39a Reviewed-on: https://go-review.googlesource.com/14603 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-09-15 11:40:24 -06:00
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
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
MOVW R0, _rt0_arm_darwin_lib_argc<>(SB)
MOVW R1, _rt0_arm_darwin_lib_argv<>(SB)
runtime: for c-archive/c-shared, install signal handlers synchronously The previous behaviour of installing the signal handlers in a separate thread meant that Go initialization raced with non-Go initialization if the non-Go initialization also wanted to install signal handlers. Make installing signal handlers synchronous so that the process-wide behavior is predictable. Update #9896. Change-Id: Ice24299877ec46f8518b072a381932d273096a32 Reviewed-on: https://go-review.googlesource.com/18150 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Crawshaw <crawshaw@golang.org>
2015-12-26 10:51:59 -07:00
// Synchronous initialization.
MOVW $runtime·libpreinit(SB), R3
CALL (R3)
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
// Create a new thread to do the runtime initialization and return.
runtime: preserve R11 in darwin/arm entrypoint The _rt0_arm_darwin_lib entrypoint has to conform to the darwin ARMv7 calling convention, which requires functions to preserve the value of R11. Go uses R11 as the liblink REGTMP register, so save it manually. Also avoid using R4, which is also callee-save. Fixes #12590 Change-Id: I9c3b374e330f81ff8fc9c01fa20505a33ddcf39a Reviewed-on: https://go-review.googlesource.com/14603 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-09-15 11:40:24 -06:00
MOVW _cgo_sys_thread_create(SB), R3
CMP $0, R3
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
B.EQ nocgo
MOVW $_rt0_arm_darwin_lib_go(SB), R0
MOVW $0, R1
runtime: preserve R11 in darwin/arm entrypoint The _rt0_arm_darwin_lib entrypoint has to conform to the darwin ARMv7 calling convention, which requires functions to preserve the value of R11. Go uses R11 as the liblink REGTMP register, so save it manually. Also avoid using R4, which is also callee-save. Fixes #12590 Change-Id: I9c3b374e330f81ff8fc9c01fa20505a33ddcf39a Reviewed-on: https://go-review.googlesource.com/14603 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-09-15 11:40:24 -06:00
MOVW R2, R11
BL (R3)
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
RET
nocgo:
MOVW $0x400000, R0
runtime: preserve R11 in darwin/arm entrypoint The _rt0_arm_darwin_lib entrypoint has to conform to the darwin ARMv7 calling convention, which requires functions to preserve the value of R11. Go uses R11 as the liblink REGTMP register, so save it manually. Also avoid using R4, which is also callee-save. Fixes #12590 Change-Id: I9c3b374e330f81ff8fc9c01fa20505a33ddcf39a Reviewed-on: https://go-review.googlesource.com/14603 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-09-15 11:40:24 -06:00
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)
runtime: library entry point for darwin/arm Tested by using -buildmode=c-archive to generate an archive, add it to an Xcode project and calling a Go function from an iOS app. (I'm still investigating proper buildmode tests for all.bash.) Change-Id: I7890df15246df8e90ad27837b8d64ba2cde409fe Reviewed-on: https://go-review.googlesource.com/8719 Reviewed-by: Ian Lance Taylor <iant@golang.org>
2015-04-10 11:07:04 -06:00
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, $4
runtime: darwin/arm support Change-Id: I63110daad2d62ae72ab1f33a40464d76e6205627 Reviewed-on: https://go-review.googlesource.com/2121 Reviewed-by: David Crawshaw <crawshaw@golang.org>
2014-12-25 23:07:10 -07:00
TEXT main(SB),NOSPLIT,$-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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