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| author | David Crawshaw <crawshaw@golang.org> | 2015-04-16 13:49:36 -0400 |
|---|---|---|
| committer | David Crawshaw <crawshaw@golang.org> | 2015-04-16 18:56:54 +0000 |
| commit | e8b7133e9bb210c8f8901421db0bb9c30e934a16 (patch) | |
| tree | 95e3400c058abd43c49922d7f4ad593cb4263581 /src/runtime/rt0_darwin_arm64.s | |
| parent | 3eadc59b0d23b2807787057e2251ee48b4be39c3 (diff) | |
| download | go-e8b7133e9bb210c8f8901421db0bb9c30e934a16.tar.gz go-e8b7133e9bb210c8f8901421db0bb9c30e934a16.zip | |
runtime: darwin/arm64 c-archive entry point
Change-Id: Ib227aa3e14d01a0ab1ad9e53d107858e045d1c42
Reviewed-on: https://go-review.googlesource.com/8984
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/rt0_darwin_arm64.s')
| -rw-r--r-- | src/runtime/rt0_darwin_arm64.s | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/runtime/rt0_darwin_arm64.s b/src/runtime/rt0_darwin_arm64.s index c728859008..e4e4a30f46 100644 --- a/src/runtime/rt0_darwin_arm64.s +++ b/src/runtime/rt0_darwin_arm64.s @@ -11,6 +11,40 @@ TEXT _rt0_arm64_darwin(SB),NOSPLIT,$-8 MOVD $1, R16 // SYS_exit SVC $0x80 +// 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,$0 + // R27 is REGTMP, reserved for liblink. It is used below to + // move R0/R1 into globals. However in the standard ARM64 calling + // convention, it is a callee-saved register. So we save it to a + // temporary register. + MOVD R27, R7 + + MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB) + MOVD R1, _rt0_arm64_darwin_lib_argv<>(SB) + // 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 + BL (R4) + + MOVD R7, R27 + 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, $8 + TEXT main(SB),NOSPLIT,$-8 MOVD $runtime·rt0_go(SB), R2 BL (R2) |