From: Paul E. Murphy <murp@ibm.com>
Date: Fri, 8 Jan 2021 21:43:54 +0000 (-0600)
Subject: syscall: ensure openat uses variadic libc wrapper
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cfaaa6a1ca744c1a93fa08a3e7ab2a821383cac1;p=gcc.git

syscall: ensure openat uses variadic libc wrapper

On powerpc64le, this caused a failure in TestUnshareUidGidMapping
due to stack corruption which resulted in a bogus execve syscall.

Use the existing c wrapper to ensure we respect the ppc abi for
variadic functions.

Fixes PR go/98610

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/282717
---

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 094b8fad483..cd95c3d0755 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-a2578eb3983514641f0baf44d27d6474d3a96758
+255657dc8d61ab26121ca68f124412ef37599166
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/syscall/exec_linux.go b/libgo/go/syscall/exec_linux.go
index 38975810432..0da6c964966 100644
--- a/libgo/go/syscall/exec_linux.go
+++ b/libgo/go/syscall/exec_linux.go
@@ -20,7 +20,7 @@ import (
 //mount(source *byte, target *byte, fstype *byte, flags _C_long, data *byte) _C_int
 
 //sysnb rawOpenat(dirfd int, pathname *byte, flags int, perm uint32) (fd int, err Errno)
-//openat(dirfd _C_int, pathname *byte, flags _C_int, perm Mode_t) _C_int
+//__go_openat(dirfd _C_int, pathname *byte, flags _C_int, perm Mode_t) _C_int
 
 // SysProcIDMap holds Container ID to Host ID mappings used for User Namespaces in Linux.
 // See user_namespaces(7).