Opened 10 years ago

Closed 10 years ago

#312 closed defect (fixed)

FPU control word is altered at startup

Reported by: KO Myung-Hun Owned by:
Priority: normal Milestone: libc-0.6.6
Component: libc Version: 0.6.5
Severity: normal Keywords:
Cc:

Description

Hi/2.

It is well known that some dlls alter FPU CW but do not restore it. So if those dlls are imported, FPU CW is altered at startup. This may cause SIGFPE later. To prevent this, it's good to initialize FPU CW at startup.

Attachments (1)

fpucw.diff​ (465 bytes ) - added by KO Myung-Hun 10 years ago.
patch to initialize FPU CW at startup

Download all attachments as: .zip

Change History (2)

by KO Myung-Hun, 10 years ago

Attachment: fpucw.diff​ added

patch to initialize FPU CW at startup

comment:1 by bird, 10 years ago

Milestone: libc-0.7 → libc-0.6.6
Resolution: → fixed
Status: new → closed

Great idea! I'd like to have it in the crt0 assembly code, though. Implemented this in r3900 (untested).

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