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target-alpha: Fixes for alpha-linux syscalls.

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1. Add correct definitions of error numbers.
2. Implement SYS_osf_sigprocmask
3. Implement SYS_osf_get/setsysinfo for IEEE_FP_CONTROL.

This last requires exposing the FPCR value to do_syscall.
Since this value is actually split up into the float_status,
expose routines from helper.c to access it.

Finally, also add a float_exception_mask field to float_status.
We don't actually use it to control delivery of exceptions to
the emulator yet, but simply hold the value that we placed there
when loading/storing the FPCR.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2009-12-09 15:56:29 -08:00 • committed by Aurelien Jarno
parent 990b3e1901
commit ba0e276db4
6 changed files with 468 additions and 49 deletions
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1
fpu/softfloat.h
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@ -187,6 +187,7 @@ typedef struct float_status {
signed char float_detect_tininess;
signed char float_rounding_mode;
signed char float_exception_flags;
signed char float_exception_mask;
#ifdef FLOATX80
signed char floatx80_rounding_precision;
#endif