target-alpha: Fixes for alpha-linux syscalls.

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>

1 files changed, 1 insertions, 0 deletions

diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 636591b04c..9d82694119 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -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