diff options
| -rw-r--r-- | arch/arm64/include/asm/exception.h | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/entry-common.c | 14 | ||||
| -rw-r--r-- | arch/arm64/kernel/traps.c | 10 |
3 files changed, 22 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/exception.h b/arch/arm64/include/asm/exception.h index 3f5141dc3341..0278a58abe69 100644 --- a/arch/arm64/include/asm/exception.h +++ b/arch/arm64/include/asm/exception.h @@ -59,7 +59,8 @@ asmlinkage void asm_exit_to_user_mode(struct pt_regs *regs); void do_mem_abort(unsigned long far, unsigned long esr, struct pt_regs *regs); void do_undefinstr(struct pt_regs *regs, unsigned long esr); -void do_bti(struct pt_regs *regs); +void do_el0_bti(struct pt_regs *regs); +void do_el1_bti(struct pt_regs *regs, unsigned long esr); void do_debug_exception(unsigned long addr_if_watchpoint, unsigned long esr, struct pt_regs *regs); void do_fpsimd_acc(unsigned long esr, struct pt_regs *regs); diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index f334951d38e3..9173fad279af 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -388,6 +388,15 @@ static void noinstr el1_undef(struct pt_regs *regs, unsigned long esr) exit_to_kernel_mode(regs); } +static void noinstr el1_bti(struct pt_regs *regs, unsigned long esr) +{ + enter_from_kernel_mode(regs); + local_daif_inherit(regs); + do_el1_bti(regs, esr); + local_daif_mask(); + exit_to_kernel_mode(regs); +} + static void noinstr el1_dbg(struct pt_regs *regs, unsigned long esr) { unsigned long far = read_sysreg(far_el1); @@ -427,6 +436,9 @@ asmlinkage void noinstr el1h_64_sync_handler(struct pt_regs *regs) case ESR_ELx_EC_UNKNOWN: el1_undef(regs, esr); break; + case ESR_ELx_EC_BTI: + el1_bti(regs, esr); + break; case ESR_ELx_EC_BREAKPT_CUR: case ESR_ELx_EC_SOFTSTP_CUR: case ESR_ELx_EC_WATCHPT_CUR: @@ -594,7 +606,7 @@ static void noinstr el0_bti(struct pt_regs *regs) { enter_from_user_mode(regs); local_daif_restore(DAIF_PROCCTX); - do_bti(regs); + do_el0_bti(regs); exit_to_user_mode(regs); } diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 6cec65fbf8b8..54b5ba135b97 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -501,12 +501,16 @@ void do_undefinstr(struct pt_regs *regs, unsigned long esr) } NOKPROBE_SYMBOL(do_undefinstr); -void do_bti(struct pt_regs *regs) +void do_el0_bti(struct pt_regs *regs) { - BUG_ON(!user_mode(regs)); force_signal_inject(SIGILL, ILL_ILLOPC, regs->pc, 0); } -NOKPROBE_SYMBOL(do_bti); + +void do_el1_bti(struct pt_regs *regs, unsigned long esr) +{ + die("Oops - BTI", regs, esr); +} +NOKPROBE_SYMBOL(do_el1_bti); void do_el0_fpac(struct pt_regs *regs, unsigned long esr) { |