diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/entry.S | 18 | ||||
| -rw-r--r-- | arch/mips/kernel/traps.c | 2 |
3 files changed, 21 insertions, 0 deletions
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index b1d84bd4efb3..7b6c11aa1cae 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -97,6 +97,7 @@ void output_thread_info_defines(void) OFFSET(TI_TP_VALUE, thread_info, tp_value); OFFSET(TI_CPU, thread_info, cpu); OFFSET(TI_PRE_COUNT, thread_info, preempt_count); + OFFSET(TI_R2_EMUL_RET, thread_info, r2_emul_return); OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit); OFFSET(TI_RESTART_BLOCK, thread_info, restart_block); OFFSET(TI_REGS, thread_info, regs); diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S index d5ab21c3fd12..af41ba6db960 100644 --- a/arch/mips/kernel/entry.S +++ b/arch/mips/kernel/entry.S @@ -46,6 +46,11 @@ resume_userspace: local_irq_disable # make sure we dont miss an # interrupt setting need_resched # between sampling and return +#ifdef CONFIG_MIPSR2_TO_R6_EMULATOR + lw k0, TI_R2_EMUL_RET($28) + bnez k0, restore_all_from_r2_emul +#endif + LONG_L a2, TI_FLAGS($28) # current->work andi t0, a2, _TIF_WORK_MASK # (ignoring syscall_trace) bnez t0, work_pending @@ -114,6 +119,19 @@ restore_partial: # restore partial frame RESTORE_SP_AND_RET .set at +#ifdef CONFIG_MIPSR2_TO_R6_EMULATOR +restore_all_from_r2_emul: # restore full frame + .set noat + sw zero, TI_R2_EMUL_RET($28) # reset it + RESTORE_TEMP + RESTORE_AT + RESTORE_STATIC + RESTORE_SOME + LONG_L sp, PT_R29(sp) + eretnc + .set at +#endif + work_pending: andi t0, a2, _TIF_NEED_RESCHED # a2 is preloaded with TI_FLAGS beqz t0, work_notifysig diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index fc157322f609..afa447e5e97f 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1039,12 +1039,14 @@ asmlinkage void do_ri(struct pt_regs *regs) switch (status) { case 0: case SIGEMT: + task_thread_info(current)->r2_emul_return = 1; return; case SIGILL: goto no_r2_instr; default: process_fpemu_return(status, ¤t->thread.cp0_baduaddr); + task_thread_info(current)->r2_emul_return = 1; return; } } |