Module Name: src
Committed By: mrg
Date: Mon Aug 15 02:29:38 UTC 2011
Modified Files:
src/doc: HACKS
Log Message:
note the sparc / GCC 4.5.3 / NULL savefpstate IPI hack.
To generate a diff of this commit:
cvs rdiff -u -r1.115 -r1.116 src/doc/HACKS
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/doc/HACKS
diff -u src/doc/HACKS:1.115 src/doc/HACKS:1.116
--- src/doc/HACKS:1.115 Sat Mar 12 08:03:06 2011
+++ src/doc/HACKS Mon Aug 15 02:29:38 2011
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.115 2011/03/12 08:03:06 matt Exp $
+# $NetBSD: HACKS,v 1.116 2011/08/15 02:29:38 mrg Exp $
#
# This file is intended to document workarounds for currently unsolved
# (mostly) compiler bugs.
@@ -562,6 +562,25 @@
kcah
+port sparc
+
+ hack avoid NULL pointer derefs in savefpstate IPIs and GCC 4.5.3
+ cdate Sun Aug 14 19:26:48 PDT 2011
+ who mrg
+ file sys/arch/sparc64/sparc/cpu.c : 1.234
+ file sys/arch/sparc64/sparc/cpuvar.h : 1.90
+ file sys/arch/sparc64/sparc/genassym.cf : 1.67
+ file sys/arch/sparc64/sparc/locore.s : 1.265
+ descr
+ Something is wrong with GCC 4.5.3 and the savefpstate IPI.
+ Post newlock2 there was a bug where a lock was reduced from
+ IPL_SCHED to IPL_VM (?) and occasionally savefpstate IPI
+ would crash due to NULL IPI. This was fixed by re-using the
+ right IPL value. However, GCC 4.5.3 build kernels have the
+ same problems. For now, the hack is re-instated.
+ kcah
+
+
port sparc64
hack disable optimzations for uvm_bio.c on 32 bit kernels
@@ -574,6 +593,7 @@
any optimization. This results in ubc_release panics.
kcah
+
port mips
hack mips-shared-linker-load-address
