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1906cf93f8
You might just say: 'Yeah! crosstool-NG's got its own repo!". Unfortunately, that's because the previous repo got damaged beyond repair and I had no backup. That means I'm putting backups in place in the afternoon. That also means we've lost history... :-(
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
# see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155
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# and http://www.kegel.com/xgcc3/ppc405erratum77.html
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# See also matching patch for glibc
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diff -aur glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h
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--- glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h Thu May 17 12:47:46 2001
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+++ glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h Tue Jul 23 05:38:24 2002
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@@ -41,6 +41,17 @@
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#define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS
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#define IMPLEMENT_TAS_WITH_CAS
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+#ifdef __PPC405__
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+/* workaround for PPC405 erratum #77 - Mark Hatle, dank. References:
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+ http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf
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+ http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489
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+ http://www.kegel.com/xgcc3/ppc405erratum77.html
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+ FIXME: using dbct instead of sync would be faster */
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+#define __LINUXTHREADS_PPC405_ERR77_SYNC "sync \n\t"
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+#else
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+#define __LINUXTHREADS_PPC405_ERR77_SYNC
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+#endif
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+
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PT_EI int
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__compare_and_swap (long int *p, long int oldval, long int newval)
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{
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@@ -50,6 +61,7 @@
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"0: lwarx %0,0,%1 ;"
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" xor. %0,%3,%0;"
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" bne 1f;"
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+ __LINUXTHREADS_PPC405_ERR77_SYNC
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" stwcx. %2,0,%1;"
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" bne- 0b;"
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"1: "
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