From 8da54a4eec860b2b96d43abe3a40f1c08edb6493 Mon Sep 17 00:00:00 2001 From: Srdjan Petrovic Date: Tue, 17 Mar 2015 09:47:01 -0700 Subject: cmd: linker changes for shared library initialization Suggested by iant@, this change: - looks for a symbol _rt0___lib, - if the symbol is present, adds a new entry into the .init_array ELF section that points to the symbol. The end-effect is that the symbol _rt0___lib will be invoked as soon as the (ELF) shared library is loaded, which will in turn initialize the runtime. (To be implemented.) Change-Id: I99911a180215a6df18f8a18483d12b9b497b48f4 Reviewed-on: https://go-review.googlesource.com/7692 TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/rt0_linux_amd64.s | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/runtime/rt0_linux_amd64.s') diff --git a/src/runtime/rt0_linux_amd64.s b/src/runtime/rt0_linux_amd64.s index 985426acc4..9d9cb34128 100644 --- a/src/runtime/rt0_linux_amd64.s +++ b/src/runtime/rt0_linux_amd64.s @@ -10,6 +10,13 @@ TEXT _rt0_amd64_linux(SB),NOSPLIT,$-8 MOVQ $main(SB), AX JMP AX +// When linking with -shared, this symbol is called when the shared library +// is loaded. +TEXT _rt0_amd64_linux_lib(SB),NOSPLIT,$0 + // TODO(spetrovic): Do something useful, like calling $main. (Note that + // this has to be done in a separate thread, as main is expected to block.) + RET + TEXT main(SB),NOSPLIT,$-8 MOVQ $runtime·rt0_go(SB), AX JMP AX -- cgit v1.3-5-g9baa