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Diffstat (limited to 'src/runtime/rt0_darwin_arm64.s')
| -rw-r--r-- | src/runtime/rt0_darwin_arm64.s | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/runtime/rt0_darwin_arm64.s b/src/runtime/rt0_darwin_arm64.s new file mode 100644 index 0000000..697104a --- /dev/null +++ b/src/runtime/rt0_darwin_arm64.s @@ -0,0 +1,63 @@ +// 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_darwin(SB),NOSPLIT|NOFRAME,$0 + MOVD $runtime·rt0_go(SB), R2 + BL (R2) +exit: + MOVD $0, R0 + MOVD $1, R16 // sys_exit + SVC $0x80 + B exit + +// 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/arm64 platforms require +// cgo and do not support c-shared. +TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$152 + // Preserve callee-save registers. + SAVE_R19_TO_R28(8) + SAVE_F8_TO_F15(88) + + MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB) + MOVD R1, _rt0_arm64_darwin_lib_argv<>(SB) + + MOVD $0, g // initialize g to nil + + // 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 + MOVD $_rt0_arm64_darwin_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 + + // Restore callee-save registers. + RESTORE_R19_TO_R28(8) + RESTORE_F8_TO_F15(88) + + RET + +TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0 + MOVD _rt0_arm64_darwin_lib_argc<>(SB), R0 + MOVD _rt0_arm64_darwin_lib_argv<>(SB), R1 + MOVD $runtime·rt0_go(SB), R4 + B (R4) + +DATA _rt0_arm64_darwin_lib_argc<>(SB)/8, $0 +GLOBL _rt0_arm64_darwin_lib_argc<>(SB),NOPTR, $8 +DATA _rt0_arm64_darwin_lib_argv<>(SB)/8, $0 +GLOBL _rt0_arm64_darwin_lib_argv<>(SB),NOPTR, $8 + +// external linking entry point. +TEXT main(SB),NOSPLIT|NOFRAME,$0 + JMP _rt0_arm64_darwin(SB) |