diff options
Diffstat (limited to 'arch/mips/kernel/signal.c')
| -rw-r--r-- | arch/mips/kernel/signal.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index ae4231452..9e224469c 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -165,7 +165,7 @@ static int save_msa_extcontext(void __user *buf) * should already have been done when handling scalar FP * context. */ - BUG_ON(config_enabled(CONFIG_EVA)); + BUG_ON(IS_ENABLED(CONFIG_EVA)); err = __put_user(read_msa_csr(), &msa->csr); err |= _save_msa_all_upper(&msa->wr); @@ -195,7 +195,7 @@ static int restore_msa_extcontext(void __user *buf, unsigned int size) unsigned int csr; int i, err; - if (!config_enabled(CONFIG_CPU_HAS_MSA)) + if (!IS_ENABLED(CONFIG_CPU_HAS_MSA)) return SIGSYS; if (size != sizeof(*msa)) @@ -215,7 +215,7 @@ static int restore_msa_extcontext(void __user *buf, unsigned int size) * scalar FP context, so FPU & MSA should have already been * disabled whilst handling scalar FP context. */ - BUG_ON(config_enabled(CONFIG_EVA)); + BUG_ON(IS_ENABLED(CONFIG_EVA)); write_msa_csr(csr); err |= _restore_msa_all_upper(&msa->wr); @@ -315,7 +315,7 @@ int protected_save_fp_context(void __user *sc) * EVA does not have userland equivalents of ldc1 or sdc1, so * save to the kernel FP context & copy that to userland below. */ - if (config_enabled(CONFIG_EVA)) + if (IS_ENABLED(CONFIG_EVA)) lose_fpu(1); while (1) { @@ -378,7 +378,7 @@ int protected_restore_fp_context(void __user *sc) * disable the FPU here such that the code below simply copies to * the kernel FP context. */ - if (config_enabled(CONFIG_EVA)) + if (IS_ENABLED(CONFIG_EVA)) lose_fpu(0); while (1) { @@ -772,6 +772,14 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) struct mips_abi *abi = current->thread.abi; void *vdso = current->mm->context.vdso; + /* + * If we were emulating a delay slot instruction, exit that frame such + * that addresses in the sigframe are as expected for userland and we + * don't have a problem if we reuse the thread's frame for an + * instruction within the signal handler. + */ + dsemul_thread_rollback(regs); + if (regs->regs[0]) { switch(regs->regs[2]) { case ERESTART_RESTARTBLOCK: |