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Diffstat (limited to 'arch/mips/kernel/signal.c')
-rw-r--r--arch/mips/kernel/signal.c18
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: