From: Ben Kaduk <kaduk@mit.edu>
Date: Wed, 30 Jun 2010 04:40:09 +0000 (-0400)
Subject: Disable red zones for amd64 FBSD kernel code
X-Git-Tag: openafs-devel-1_5_75~37
X-Git-Url: https://git.michaelhowe.org/gitweb/?a=commitdiff_plain;h=3f5144b3edfca5187ce417da8929eea86c930ef0;p=packages%2Fo%2Fopenafs.git

Disable red zones for amd64 FBSD kernel code

The kernel has been compiled with -mno-red-zone since at least
FreeBSD 5.0; when we compile libafs.ko with red zones enabled
and interact with the red-zone-less kernel, we get occasional
stack corruption, which manifests itself in a variety of
unpleasant ways.
The flags we pass to gcc for our module build currently differ
substantially from those used during a kernel build (or modules
built with the kernel); I hope to transition to a module build
process involving bsd.kmod.mk in the relatively near future.

Change-Id: I406e264c1f96e1d893b9d12b561f48a3cbfdf57c
Reviewed-on: http://gerrit.openafs.org/2297
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
---

diff --git a/src/libafs/MakefileProto.FBSD.in b/src/libafs/MakefileProto.FBSD.in
index cce28dc03..203513562 100644
--- a/src/libafs/MakefileProto.FBSD.in
+++ b/src/libafs/MakefileProto.FBSD.in
@@ -38,6 +38,8 @@ KSRC = @BSD_KERNEL_PATH@
 KBLD = @BSD_KERNEL_BUILD@
 <amd64_fbsd_70 amd64_fbsd_71 amd64_fbsd_80 amd64_fbsd_81 amd64_fbsd_90>
 KOPTS = -fPIC
+<amd64>
+KOPTS += -mno-red-zone
 <all>
 
 KDEFS=-Wall -nostdinc -I/usr/include -D_KERNEL -DKLD_MODULE \