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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
commit43a123c1ae6613b3efeed291fa552ecd909d3acf (patch)
treefd92518b7024bc74031f78a1cf9e454b65e73665 /src/runtime/rt0_linux_arm64.s
parentInitial commit. (diff)
downloadgolang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz
golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/rt0_linux_arm64.s')
-rw-r--r--src/runtime/rt0_linux_arm64.s73
1 files changed, 73 insertions, 0 deletions
diff --git a/src/runtime/rt0_linux_arm64.s b/src/runtime/rt0_linux_arm64.s
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+++ b/src/runtime/rt0_linux_arm64.s
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+// Copyright 2015 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"
+#include "cgo/abi_arm64.h"
+
+TEXT _rt0_arm64_linux(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_linux_lib(SB),NOSPLIT,$184
+ // Preserve callee-save registers.
+ SAVE_R19_TO_R28(24)
+ SAVE_F8_TO_F15(104)
+
+ // Initialize g as null in case of using g later e.g. sigaction in cgo_sigaction.go
+ MOVD ZR, g
+
+ MOVD R0, _rt0_arm64_linux_lib_argc<>(SB)
+ MOVD R1, _rt0_arm64_linux_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
+ CBZ R4, nocgo
+ MOVD $_rt0_arm64_linux_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_linux_lib_go(SB), R1
+ MOVD R0, 8(RSP)
+ MOVD R1, 16(RSP)
+ MOVD $runtime·newosproc0(SB),R4
+ BL (R4)
+
+restore:
+ // Restore callee-save registers.
+ RESTORE_R19_TO_R28(24)
+ RESTORE_F8_TO_F15(104)
+ RET
+
+TEXT _rt0_arm64_linux_lib_go(SB),NOSPLIT,$0
+ MOVD _rt0_arm64_linux_lib_argc<>(SB), R0
+ MOVD _rt0_arm64_linux_lib_argv<>(SB), R1
+ MOVD $runtime·rt0_go(SB),R4
+ B (R4)
+
+DATA _rt0_arm64_linux_lib_argc<>(SB)/8, $0
+GLOBL _rt0_arm64_linux_lib_argc<>(SB),NOPTR, $8
+DATA _rt0_arm64_linux_lib_argv<>(SB)/8, $0
+GLOBL _rt0_arm64_linux_lib_argv<>(SB),NOPTR, $8
+
+
+TEXT main(SB),NOSPLIT|NOFRAME,$0
+ MOVD $runtime·rt0_go(SB), R2
+ BL (R2)
+exit:
+ MOVD $0, R0
+ MOVD $94, R8 // sys_exit
+ SVC
+ B exit