diff options
| author | bde <bde@FreeBSD.org> | 2001-05-20 17:01:20 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 2001-05-20 17:01:20 +0000 |
| commit | fe3ed5cadca20fbbc88e70b0e90ba5261ab16058 (patch) | |
| tree | 0fb52f5903fd252444f2c609efdacba78412b35b /sys/i386 | |
| parent | 20d39ffc04278fc10ff2ca16a7de8f2ad3597130 (diff) | |
| download | FreeBSD-src-fe3ed5cadca20fbbc88e70b0e90ba5261ab16058.zip FreeBSD-src-fe3ed5cadca20fbbc88e70b0e90ba5261ab16058.tar.gz | |
Use a critical region to protect pushing of curproc's npx state to
curpcb in vm86_bioscall(). I don't know if the state is ever in the
npx at that point.
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/vm86bios.s | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/i386/i386/vm86bios.s b/sys/i386/i386/vm86bios.s index e5522bc..e12ac41 100644 --- a/sys/i386/i386/vm86bios.s +++ b/sys/i386/i386/vm86bios.s @@ -65,6 +65,8 @@ ENTRY(vm86_bioscall) pushl %gs #ifdef DEV_NPX + pushfl + cli movl PCPU(CURPROC),%ecx cmpl %ecx,PCPU(NPXPROC) /* do we need to save fp? */ jne 1f @@ -77,9 +79,10 @@ ENTRY(vm86_bioscall) call npxsave popl %ecx popl %edx /* recover our pcb */ +1: + popfl #endif -1: movl SCR_VMFRAME(%edx),%ebx /* target frame location */ movl %ebx,%edi /* destination */ movl SCR_ARGFRAME(%edx),%esi /* source (set on entry) */ |
