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author | grehan <grehan@FreeBSD.org> | 2005-07-30 11:14:31 +0000 |
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committer | grehan <grehan@FreeBSD.org> | 2005-07-30 11:14:31 +0000 |
commit | 0fa9c0072869442b1991859e8502cebe197afff3 (patch) | |
tree | a64d06e4aae330b1b275ad706f9ce8ee75083f0a /sys/powerpc/aim/trap.c | |
parent | 8d407835a80df92b173c8d1dd7a556a9e5f0855b (diff) | |
download | FreeBSD-src-0fa9c0072869442b1991859e8502cebe197afff3.zip FreeBSD-src-0fa9c0072869442b1991859e8502cebe197afff3.tar.gz |
Temporary band-aid to fix hang when a process exec's Altivec instructions.
trap_subr.S: declare a stub for the a-unavailable trap
that does an absolute jump to the vector-assist trap.
This is due to the fact that the vec-unavail trap
doesn't start at a 256-byte boundary, so the trick of
masking the bottom 8 bits of the link register to identify
the interrupt doesn't work, so let the vec-assist
case handle Altivec-disabled for the time being.
Note that this will be fixed in the future with a much
smaller vector code-stub (< 16 bytes) that will allow
use of strange vector offsets that are also present in
4xx processors, and also allow smaller differences in
vector codepaths on the G5.
trap.c: Treat altivec-unavailable/assist process traps as SIGILL.
Not quite correct, since altivec-assist should really be a panic,
but it is fine for the moment due to the above measure.
machdep.c Install the stub code for the altivec-unavailable trap, and
the standard trap code at the altivec-assist.
Reported by: Andreas Tobler <toa at pop agri ch>
MFC after: 3 days
Diffstat (limited to 'sys/powerpc/aim/trap.c')
-rw-r--r-- | sys/powerpc/aim/trap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/powerpc/aim/trap.c b/sys/powerpc/aim/trap.c index 669bb60..85bdab9 100644 --- a/sys/powerpc/aim/trap.c +++ b/sys/powerpc/aim/trap.c @@ -199,6 +199,11 @@ trap(struct trapframe *frame) enable_vec(td); frame->srr1 |= PSL_VEC; break; +#else + case EXC_VEC: + case EXC_VECAST: + sig = SIGILL; + break; #endif /* ALTIVEC */ case EXC_ALI: |