crosstool-ng: patches/glibc/linuxthreads-2.2.5/linuxthreads-2.2.5-ppc405erratum77.patch@2be7232a73ac

     1 # see http://bugs.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4155

     2 # and http://www.kegel.com/xgcc3/ppc405erratum77.html

     3 # See also matching patch for glibc

     5 diff -aur glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h

     6 --- glibc-2.2.5.orig/linuxthreads/sysdeps/powerpc/pt-machine.h	Thu May 17 12:47:46 2001

     7 +++ glibc-2.2.5/linuxthreads/sysdeps/powerpc/pt-machine.h	Tue Jul 23 05:38:24 2002

     8 @@ -41,6 +41,17 @@

     9  #define HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS

    10  #define IMPLEMENT_TAS_WITH_CAS

    12 +#ifdef __PPC405__

    13 +/* workaround for PPC405 erratum #77 - Mark Hatle, dank.  References:

    14 +   http://www-3.ibm.com/chips/techlib/techlib.nsf/techdocs/89DED00DEBFF54BF87256A8000491BA2/$file/405CR_C_errata_1_2.pdf

    15 +   http://ppc.bkbits.net:8080/linuxppc_2_4_devel/cset@1.489

    16 +   http://www.kegel.com/xgcc3/ppc405erratum77.html

    17 +   FIXME: using dbct instead of sync would be faster  */

    18 +#define __LINUXTHREADS_PPC405_ERR77_SYNC   "sync \n\t"

    19 +#else

    20 +#define __LINUXTHREADS_PPC405_ERR77_SYNC

    21 +#endif

    22 +

    23  PT_EI int

    24  __compare_and_swap (long int *p, long int oldval, long int newval)

    25  {

    26 @@ -50,6 +61,7 @@

    27  	   "0:    lwarx %0,0,%1 ;"

    28  	   "      xor. %0,%3,%0;"

    29  	   "      bne 1f;"

    30 +	   __LINUXTHREADS_PPC405_ERR77_SYNC

    31  	   "      stwcx. %2,0,%1;"

    32  	   "      bne- 0b;"

    33  	   "1:    "

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sat Jul 28 21:34:41 2007 +0000 (2007-07-28)
changeset 301	2be7232a73ac
permissions	-rw-r--r--