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| author | Elias Naur <elias.naur@gmail.com> | 2018-06-07 12:19:42 +0200 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2018-06-12 17:05:46 +0000 |
| commit | 021c39d7a3361290d9e29497cf2a4a8fd2ee7b5c (patch) | |
| tree | 573c7176129e0e5a0ed8b30b867453f04de0aa4b /src/runtime/rt0_darwin_arm64.s | |
| parent | ec989337c5d3203d52de1a2314813996c711fce6 (diff) | |
| download | go-021c39d7a3361290d9e29497cf2a4a8fd2ee7b5c.tar.gz go-021c39d7a3361290d9e29497cf2a4a8fd2ee7b5c.zip | |
runtime: use libc for signal functions on iOS
Also:
- Add extra SystemStack space for darwin/arm64 just
like for darwin/arm.
- Removed redundant stack alignment; the arm64 hardware enforces
the 16 byte alignment.
- Save and restore the g registers at library initialization.
- Zero g registers since libpreinit can call libc functions
that in turn use asmcgocall. asmcgocall requires an initialized g.
- Change asmcgocall to work even if no g is set. The change mimics
amd64.
Change-Id: I1b8c63b07cfec23b909c0d215b50dc229f8adbc8
Reviewed-on: https://go-review.googlesource.com/117176
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/runtime/rt0_darwin_arm64.s')
| -rw-r--r-- | src/runtime/rt0_darwin_arm64.s | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/src/runtime/rt0_darwin_arm64.s b/src/runtime/rt0_darwin_arm64.s index 719944e626..d039a8e0ab 100644 --- a/src/runtime/rt0_darwin_arm64.s +++ b/src/runtime/rt0_darwin_arm64.s @@ -26,18 +26,21 @@ TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$168 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, 96(RSP) + FMOVD F8, 104(RSP) + FMOVD F9, 112(RSP) + FMOVD F10, 120(RSP) + FMOVD F11, 128(RSP) + FMOVD F12, 136(RSP) + FMOVD F13, 144(RSP) + FMOVD F14, 152(RSP) + FMOVD F15, 160(RSP) 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) @@ -58,14 +61,16 @@ TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$168 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 96(RSP), g + FMOVD 104(RSP), F8 + FMOVD 112(RSP), F9 + FMOVD 120(RSP), F10 + FMOVD 128(RSP), F11 + FMOVD 136(RSP), F12 + FMOVD 144(RSP), F13 + FMOVD 152(RSP), F14 + FMOVD 160(RSP), F15 + RET TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0 |