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| author | Elias Naur <mail@eliasnaur.com> | 2019-04-30 09:18:23 +0200 |
|---|---|---|
| committer | Elias Naur <mail@eliasnaur.com> | 2019-04-30 16:43:59 +0000 |
| commit | 9f12e2e04bc5fb5c53546cf9c53dabe0d1c8fa55 (patch) | |
| tree | 448592af34810ccd5e2791aa9f16438ddcdbea97 /src | |
| parent | e0ac75d2ab9da30d41a76a4ed89b89cb79cb5c60 (diff) | |
| download | go-9f12e2e04bc5fb5c53546cf9c53dabe0d1c8fa55.tar.xz | |
runtime: implement pthread functions for darwin/arm64
They were not needed when Go only produced binaries with cgo suppport.
Now that Go is about to run self-hosted on iOS we do need these.
Updates #31722
Change-Id: If233aa2b31edc7b1c2dcac68974f9fba0604f9a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/174300
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/runtime/sys_darwin_arm64.s | 85 |
1 files changed, 72 insertions, 13 deletions
diff --git a/src/runtime/sys_darwin_arm64.s b/src/runtime/sys_darwin_arm64.s index 89a2b8a054..fa6157eba9 100644 --- a/src/runtime/sys_darwin_arm64.s +++ b/src/runtime/sys_darwin_arm64.s @@ -304,33 +304,92 @@ TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0 RET // Thread related functions -// Note: On darwin/arm64, the runtime always use runtime/cgo to -// create threads, so all thread related functions will just exit with a -// unique status. +// mstart_stub is the first function executed on a new thread started by pthread_create. +// It just does some low-level setup and then calls mstart. +// Note: called with the C calling convention. TEXT runtime·mstart_stub(SB),NOSPLIT,$0 - MOVW $44, R0 - BL libc_exit(SB) + // R0 points to the m. + // We are already on m's g0 stack. + + // Save callee-save registers. + SUB $144, RSP + MOVD R19, 0(RSP) + MOVD R20, 8(RSP) + MOVD R21, 16(RSP) + MOVD R22, 24(RSP) + MOVD R23, 32(RSP) + MOVD R24, 40(RSP) + MOVD R25, 48(RSP) + MOVD R26, 56(RSP) + MOVD R27, 64(RSP) + MOVD g, 72(RSP) + FMOVD F8, 80(RSP) + FMOVD F9, 88(RSP) + FMOVD F10, 96(RSP) + FMOVD F11, 104(RSP) + FMOVD F12, 112(RSP) + FMOVD F13, 120(RSP) + FMOVD F14, 128(RSP) + FMOVD F15, 136(RSP) + + MOVD m_g0(R0), g + + BL runtime·mstart(SB) + + // Restore callee-save registers. + MOVD 0(RSP), R19 + MOVD 8(RSP), R20 + MOVD 16(RSP), R21 + MOVD 24(RSP), R22 + MOVD 32(RSP), R23 + MOVD 40(RSP), R24 + MOVD 48(RSP), R25 + MOVD 56(RSP), R26 + MOVD 64(RSP), R27 + MOVD 72(RSP), g + FMOVD 80(RSP), F8 + FMOVD 88(RSP), F9 + FMOVD 96(RSP), F10 + FMOVD 104(RSP), F11 + FMOVD 112(RSP), F12 + FMOVD 120(RSP), F13 + FMOVD 128(RSP), F14 + FMOVD 136(RSP), F15 + ADD $144, RSP + + // Go is all done with this OS thread. + // Tell pthread everything is ok (we never join with this thread, so + // the value here doesn't really matter). + MOVD $0, R0 + RET TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0 - MOVW $45, R0 - BL libc_exit(SB) + MOVD 0(R0), R0 // arg 1 attr + BL libc_pthread_attr_init(SB) RET TEXT runtime·pthread_attr_setstacksize_trampoline(SB),NOSPLIT,$0 - MOVW $46, R0 - BL libc_exit(SB) + MOVD 8(R0), R1 // arg 2 size + MOVD 0(R0), R0 // arg 1 attr + BL libc_pthread_attr_setstacksize(SB) RET TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0 - MOVW $47, R0 - BL libc_exit(SB) + MOVD 8(R0), R1 // arg 2 state + MOVD 0(R0), R0 // arg 1 attr + BL libc_pthread_attr_setdetachstate(SB) RET TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0 - MOVW $48, R0 - BL libc_exit(SB) + SUB $16, RSP + MOVD 0(R0), R1 // arg 2 state + MOVD 8(R0), R2 // arg 3 start + MOVD 16(R0), R3 // arg 4 arg + MOVD RSP, R0 // arg 1 &threadid (which we throw away) + BL libc_pthread_create(SB) + ADD $16, RSP RET TEXT runtime·raise_trampoline(SB),NOSPLIT,$0 |