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-rw-r--r--patches/glibc/2.7/290-powerpc-8xx-CPU15-errata.patch40
1 files changed, 40 insertions, 0 deletions
diff --git a/patches/glibc/2.7/290-powerpc-8xx-CPU15-errata.patch b/patches/glibc/2.7/290-powerpc-8xx-CPU15-errata.patch
new file mode 100644
index 0000000..03cd441
--- /dev/null
+++ b/patches/glibc/2.7/290-powerpc-8xx-CPU15-errata.patch
@@ -0,0 +1,40 @@
+Fix memset on PowerPC 8xx, by Nye Liu:
+http://sourceware.org/ml/crossgcc/2008-10/msg00067.html
+
+Quote:
+ I am working on a powerpc 860 toolchain, but I am having problems
+ convincing glibc to not emit code that uses the dcbz instruction (CPU15
+ dcbX bug). The source of the problem is sysdeps/powerpc/power3/memset.S
+
+--- glibc-2.7/sysdeps/powerpc/powerpc32/memset.S 2007-03-26 13:09:07.000000000 -0700
++++ glibc-2.7/sysdeps/powerpc/powerpc32/memset.S.new 2008-10-23 12:20:04.000000000 -0700
+@@ -112,11 +112,13 @@
+ clrrwi. rALIGN, rLEN, 5
+ mtcrf 0x01, rLEN /* 40th instruction from .align */
+
++#ifndef BROKEN_PPC_8xx_CPU15
+ /* Check if we can use the special case for clearing memory using dcbz.
+ This requires that we know the correct cache line size for this
+ processor. Getting the __cache_line_size may require establishing GOT
+ addressability, so branch out of line to set this up. */
+ beq cr1, L(checklinesize)
++#endif
+
+ /* Store blocks of 32-bytes (256-bits) starting on a 32-byte boundary.
+ Can't assume that rCHR is zero or that the cache line size is either
+@@ -248,6 +250,7 @@
+ stw rCHR, -8(rMEMP)
+ blr
+
++#ifndef BROKEN_PPC_8xx_CPU15
+ L(checklinesize):
+ #ifdef SHARED
+ mflr rTMP
+@@ -329,6 +332,7 @@
+ L(handletail32):
+ clrrwi. rALIGN, rLEN, 5
+ b L(nondcbz)
++#endif /* ! BROKEN_PPC_8xx_CPU15 */
+
+ END (BP_SYM (memset))
+ libc_hidden_builtin_def (memset)