powerpc: Fix clearing of the FPSCR when invoking a signal handler

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As pointed out by Gary Byers, we were clearing the image of the FPSCR
(floating point status and control register) in the thread_struct before
copying it to the user stack when invoking a signal.  Thus the task
would see its FPSCR getting cleared when it took a signal.

While fixing it I noticed that our swapcontext system call was also
clearing FPSCR.  It shouldn't, so I fixed that too.

Signed-off-by: Paul Mackerras <paulus@samba.org>

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This commit is contained in:

Paul Mackerras 2005-11-14 21:55:15 +11:00

parent 493f25ef40

commit cc657f5392

2 changed files with 8 additions and 5 deletions

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7

arch/powerpc/kernel/signal_32.c

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6

arch/powerpc/kernel/signal_64.c

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