diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2007-10-11 17:07:34 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-02 08:44:15 -0700 |
| commit | 02d29bbef2858caeac240a3d6291695717845c41 (patch) | |
| tree | 585300d7799760e50cf8ccf35886228c5eccdaa5 /arch | |
| parent | 0a0225bae6d086e1ffa8a5aa3bf265ec83b57c34 (diff) | |
POWERPC: Fix handling of stfiwx math emulation
patch ba02946a903015840ef672ccc9dc8620a7e83de6 in mainline
Its legal for the stfiwx instruction to have RA = 0 as part of its
effective address calculation. This is illegal for all other XE
form instructions.
Add code to compute the proper effective address for stfiwx if
RA = 0 rather than treating it as illegal.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/math-emu/math.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/powerpc/math-emu/math.c b/arch/powerpc/math-emu/math.c index 69058b2873d..381306bb159 100644 --- a/arch/powerpc/math-emu/math.c +++ b/arch/powerpc/math-emu/math.c @@ -407,11 +407,16 @@ do_mathemu(struct pt_regs *regs) case XE: idx = (insn >> 16) & 0x1f; - if (!idx) - goto illegal; - op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f]; - op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]); + if (!idx) { + if (((insn >> 1) & 0x3ff) == STFIWX) + op1 = (void *)(regs->gpr[(insn >> 11) & 0x1f]); + else + goto illegal; + } else { + op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]); + } + break; case XEU: |