From da8a3502014c8edf84492267cba1bfdd8e313b3e Mon Sep 17 00:00:00 2001 From: "Paul E. Murphy" Date: Fri, 19 Aug 2022 09:20:02 -0500 Subject: [release-branch.go1.18] runtime: fix ppc64 startup on newer linux kernels R0 needs to be cleared at startup as it may not always be cleared by the kernel on newer kernels. Fixes #54664 Change-Id: Id7055699aaa8d8b193b7e3e784f075ce29ac3f1d Reviewed-on: https://go-review.googlesource.com/c/go/+/424927 TryBot-Result: Gopher Robot Reviewed-by: Lynn Boger Reviewed-by: Cherry Mui Reviewed-by: David Chase Run-TryBot: Paul Murphy Reviewed-on: https://go-review.googlesource.com/c/go/+/425369 Reviewed-by: Ian Lance Taylor --- src/runtime/rt0_linux_ppc64.s | 1 + 1 file changed, 1 insertion(+) diff --git a/src/runtime/rt0_linux_ppc64.s b/src/runtime/rt0_linux_ppc64.s index 897d61052a..c9300a9caf 100644 --- a/src/runtime/rt0_linux_ppc64.s +++ b/src/runtime/rt0_linux_ppc64.s @@ -22,6 +22,7 @@ TEXT _main<>(SB),NOSPLIT,$-8 // There is no TLS base pointer. // // TODO(austin): Support ABI v1 dynamic linking entry point + XOR R0, R0 // Note, newer kernels may not always set R0 to 0. MOVD $runtime·rt0_go(SB), R12 MOVD R12, CTR MOVBZ runtime·iscgo(SB), R5 -- cgit v1.2.3-54-g00ecf