diff options
| author | Maya Rashish <maya@netbsd.org> | 2019-04-20 14:39:33 +0000 |
|---|---|---|
| committer | Benny Siegert <bsiegert@gmail.com> | 2019-04-20 15:02:01 +0000 |
| commit | d23cba683e59f6092c1e3f676c8e83e7973f27dd (patch) | |
| tree | 4aa09c72d160cfe228ca01d667c1d667d77249a6 /src/runtime/rt0_netbsd_arm64.s | |
| parent | 78f0de10eccf3606dbc4b854a4cd3a7e502edc07 (diff) | |
| download | go-d23cba683e59f6092c1e3f676c8e83e7973f27dd.tar.gz go-d23cba683e59f6092c1e3f676c8e83e7973f27dd.zip | |
all: add start of netbsd/arm64 support
This works well enough to run some code natively on arm64, but not well enough for more complicated code. I've been suggested to start a pull request anyway.
Updates #30824
Change-Id: Ib4f63e0e8a9edfc862cf65b5f1b0fbf9a8a1628e
GitHub-Last-Rev: b01b105e0446e349c8d9895d3ac6918fa0cdc48c
GitHub-Pull-Request: golang/go#29398
Reviewed-on: https://go-review.googlesource.com/c/go/+/155739
Run-TryBot: Benny Siegert <bsiegert@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Diffstat (limited to 'src/runtime/rt0_netbsd_arm64.s')
| -rw-r--r-- | src/runtime/rt0_netbsd_arm64.s | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/runtime/rt0_netbsd_arm64.s b/src/runtime/rt0_netbsd_arm64.s new file mode 100644 index 0000000000..75ecbe5176 --- /dev/null +++ b/src/runtime/rt0_netbsd_arm64.s @@ -0,0 +1,103 @@ +// Copyright 2019 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_arm64_netbsd(SB),NOSPLIT|NOFRAME,$0 + MOVD 0(RSP), R0 // argc + ADD $8, RSP, R1 // argv + BL main(SB) + +// When building with -buildmode=c-shared, this symbol is called when the shared +// library is loaded. +TEXT _rt0_arm64_netbsd_lib(SB),NOSPLIT,$184 + // Preserve callee-save registers. + MOVD R19, 24(RSP) + MOVD R20, 32(RSP) + MOVD R21, 40(RSP) + MOVD R22, 48(RSP) + MOVD R23, 56(RSP) + MOVD R24, 64(RSP) + MOVD R25, 72(RSP) + MOVD R26, 80(RSP) + MOVD R27, 88(RSP) + FMOVD F8, 96(RSP) + FMOVD F9, 104(RSP) + FMOVD F10, 112(RSP) + FMOVD F11, 120(RSP) + FMOVD F12, 128(RSP) + FMOVD F13, 136(RSP) + FMOVD F14, 144(RSP) + FMOVD F15, 152(RSP) + MOVD g, 160(RSP) + + // Initialize g as null in case of using g later e.g. sigaction in cgo_sigaction.go + MOVD ZR, g + + MOVD R0, _rt0_arm64_netbsd_lib_argc<>(SB) + MOVD R1, _rt0_arm64_netbsd_lib_argv<>(SB) + + // Synchronous initialization. + MOVD $runtime·libpreinit(SB), R4 + BL (R4) + + // Create a new thread to do the runtime initialization and return. + MOVD _cgo_sys_thread_create(SB), R4 + CMP $0, R4 + BEQ nocgo + MOVD $_rt0_arm64_netbsd_lib_go(SB), R0 + MOVD $0, R1 + SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved. + BL (R4) + ADD $16, RSP + B restore + +nocgo: + MOVD $0x800000, R0 // stacksize = 8192KB + MOVD $_rt0_arm64_netbsd_lib_go(SB), R1 + MOVD R0, 8(RSP) + MOVD R1, 16(RSP) + MOVD $runtime·newosproc0(SB),R4 + BL (R4) + +restore: + // Restore callee-save registers. + MOVD 24(RSP), R19 + MOVD 32(RSP), R20 + MOVD 40(RSP), R21 + MOVD 48(RSP), R22 + MOVD 56(RSP), R23 + MOVD 64(RSP), R24 + MOVD 72(RSP), R25 + MOVD 80(RSP), R26 + MOVD 88(RSP), R27 + FMOVD 96(RSP), F8 + FMOVD 104(RSP), F9 + FMOVD 112(RSP), F10 + FMOVD 120(RSP), F11 + FMOVD 128(RSP), F12 + FMOVD 136(RSP), F13 + FMOVD 144(RSP), F14 + FMOVD 152(RSP), F15 + MOVD 160(RSP), g + RET + +TEXT _rt0_arm64_netbsd_lib_go(SB),NOSPLIT,$0 + MOVD _rt0_arm64_netbsd_lib_argc<>(SB), R0 + MOVD _rt0_arm64_netbsd_lib_argv<>(SB), R1 + MOVD $runtime·rt0_go(SB),R4 + B (R4) + +DATA _rt0_arm64_netbsd_lib_argc<>(SB)/8, $0 +GLOBL _rt0_arm64_netbsd_lib_argc<>(SB),NOPTR, $8 +DATA _rt0_arm64_netbsd_lib_argv<>(SB)/8, $0 +GLOBL _rt0_arm64_netbsd_lib_argv<>(SB),NOPTR, $8 + + +TEXT main(SB),NOSPLIT|NOFRAME,$0 + MOVD $runtime·rt0_go(SB), R2 + BL (R2) +exit: + MOVD $0, R0 + SVC $1 // sys_exit |