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patches/glibc/ports-2.10.1/620-r10k-workarounds.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Sep 12 23:38:18 2010 +0200 (2010-09-12)
changeset 2120 48de021b3a9e
permissions -rw-r--r--
arch/mips: add experimental mips64 samples

Both toolchains were tested to successfully:
- _build_ busybox, giving respectively an n32 and an n64 binary
although it has not been run-tested.
- build linux-2.6.36-rc3 for Loongson, giving an n64 vmlinux
(which is expected, due to the way the kernel is built),
and the kernel properly boots!

Credits are due to Julien MOUTHINO (julm on freenode#uClibc) for
testing that the kernel boots on his hardware! Cheers! ;-)

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 ripped from Debian

     2 

     3 the R10000 needs an LL/SC Workaround. If not applied all R10k before

     4 rev 3.0 misbehave on atomic ops and rev 2.6 and lower (e.g. SGI IP28)

     5 die after very few seconds with a deadlock due to even more erratas.

     6 

     7  ports/sysdeps/mips/bits/atomic.h |   12 ++++++------

     8  1 file changed, 6 insertions(+), 6 deletions(-)

     9 

    10 diff -durN glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/mips/bits/atomic.h glibc-2.10.1/glibc-ports-2.10.1/sysdeps/mips/bits/atomic.h

    11 --- glibc-2.10.1.orig/glibc-ports-2.10.1/sysdeps/mips/bits/atomic.h	2009-05-16 10:36:20.000000000 +0200

    12 +++ glibc-2.10.1/glibc-ports-2.10.1/sysdeps/mips/bits/atomic.h	2009-11-13 00:51:34.000000000 +0100

    13 @@ -74,7 +74,7 @@

    14       "bne	%0,%2,2f\n\t"						      \

    15       "move	%1,%3\n\t"						      \

    16       "sc	%1,%4\n\t"						      \

    17 -     "beqz	%1,1b\n"						      \

    18 +     "beqzl	%1,1b\n"						      \

    19       acq	"\n\t"							      \

    20       ".set	pop\n"							      \

    21       "2:\n\t"								      \

    22 @@ -98,7 +98,7 @@

    23       "bne	%0,%2,2f\n\t"						      \

    24       "move	%1,%3\n\t"						      \

    25       "scd	%1,%4\n\t"						      \

    26 -     "beqz	%1,1b\n"						      \

    27 +     "beqzl	%1,1b\n"						      \

    28       acq	"\n\t"							      \

    29       ".set	pop\n"							      \

    30       "2:\n\t"								      \

    31 @@ -192,7 +192,7 @@

    32       "ll	%0,%3\n\t"						      \

    33       "move	%1,%2\n\t"						      \

    34       "sc	%1,%3\n\t"						      \

    35 -     "beqz	%1,1b\n"						      \

    36 +     "beqzl	%1,1b\n"						      \

    37       acq	"\n\t"							      \

    38       ".set	pop\n"							      \

    39       "2:\n\t"								      \

    40 @@ -216,7 +216,7 @@

    41       "lld	%0,%3\n\t"						      \

    42       "move	%1,%2\n\t"						      \

    43       "scd	%1,%3\n\t"						      \

    44 -     "beqz	%1,1b\n"						      \

    45 +     "beqzl	%1,1b\n"						      \

    46       acq	"\n\t"							      \

    47       ".set	pop\n"							      \

    48       "2:\n\t"								      \

    49 @@ -251,7 +251,7 @@

    50       "ll	%0,%3\n\t"						      \

    51       "addu	%1,%0,%2\n\t"						      \

    52       "sc	%1,%3\n\t"						      \

    53 -     "beqz	%1,1b\n"						      \

    54 +     "beqzl	%1,1b\n"						      \

    55       acq	"\n\t"							      \

    56       ".set	pop\n"							      \

    57       "2:\n\t"								      \

    58 @@ -275,7 +275,7 @@

    59       "lld	%0,%3\n\t"						      \

    60       "daddu	%1,%0,%2\n\t"						      \

    61       "scd	%1,%3\n\t"						      \

    62 -     "beqz	%1,1b\n"						      \

    63 +     "beqzl	%1,1b\n"						      \

    64       acq	"\n\t"							      \

    65       ".set	pop\n"							      \

    66       "2:\n\t"								      \

    67 diff -durN glibc-2.10.1.orig/ports/sysdeps/mips/bits/atomic.h glibc-2.10.1/ports/sysdeps/mips/bits/atomic.h
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