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Diffstat (limited to 'arch/mips/kernel/branch.c')
-rw-r--r--arch/mips/kernel/branch.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index 56aea5f526a7..374de839558d 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -22,7 +22,7 @@
*/
int __compute_return_epc(struct pt_regs *regs)
{
- unsigned int *addr, bit, fcr31;
+ unsigned int *addr, bit, fcr31, dspcontrol;
long epc;
union mips_instruction insn;
@@ -99,6 +99,18 @@ int __compute_return_epc(struct pt_regs *regs)
epc += 8;
regs->cp0_epc = epc;
break;
+ case bposge32_op:
+ if (!cpu_has_dsp)
+ goto sigill;
+
+ dspcontrol = rddsp(0x01);
+
+ if (dspcontrol >= 32) {
+ epc = epc + 4 + (insn.i_format.simmediate << 2);
+ } else
+ epc += 8;
+ regs->cp0_epc = epc;
+ break;
}
break;
@@ -200,4 +212,9 @@ unaligned:
printk("%s: unaligned epc - sending SIGBUS.\n", current->comm);
force_sig(SIGBUS, current);
return -EFAULT;
+
+sigill:
+ printk("%s: DSP branch but not DSP ASE - sending SIGBUS.\n", current->comm);
+ force_sig(SIGBUS, current);
+ return -EFAULT;
}