diff options
Diffstat (limited to 'arch/arm64/kernel/entry.S')
-rw-r--r-- | arch/arm64/kernel/entry.S | 42 |
1 files changed, 23 insertions, 19 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 6ad781b21c08..fa789169f98b 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -288,6 +288,8 @@ el1_dbg: /* * Debug exception handling */ + cmp x24, #ESR_EL1_EC_BRK64 // if BRK64 + cinc x24, x24, eq // set bit '0' tbz x24, #0, el1_inv // EL1 only mrs x0, far_el1 mov x2, sp // struct pt_regs @@ -311,14 +313,14 @@ el1_irq: #endif #ifdef CONFIG_PREEMPT get_thread_info tsk - ldr x24, [tsk, #TI_PREEMPT] // get preempt count - add x0, x24, #1 // increment it - str x0, [tsk, #TI_PREEMPT] + ldr w24, [tsk, #TI_PREEMPT] // get preempt count + add w0, w24, #1 // increment it + str w0, [tsk, #TI_PREEMPT] #endif irq_handler #ifdef CONFIG_PREEMPT - str x24, [tsk, #TI_PREEMPT] // restore preempt count - cbnz x24, 1f // preempt count != 0 + str w24, [tsk, #TI_PREEMPT] // restore preempt count + cbnz w24, 1f // preempt count != 0 ldr x0, [tsk, #TI_FLAGS] // get flags tbz x0, #TIF_NEED_RESCHED, 1f // needs rescheduling? bl el1_preempt @@ -423,6 +425,7 @@ el0_da: * Data abort handling */ mrs x0, far_el1 + bic x0, x0, #(0xff << 56) disable_step x1 isb enable_dbg @@ -476,6 +479,8 @@ el0_undef: * Undefined instruction */ mov x0, sp + // enable interrupts before calling the main handler + enable_irq b do_undefinstr el0_dbg: /* @@ -506,15 +511,15 @@ el0_irq_naked: #endif get_thread_info tsk #ifdef CONFIG_PREEMPT - ldr x24, [tsk, #TI_PREEMPT] // get preempt count - add x23, x24, #1 // increment it - str x23, [tsk, #TI_PREEMPT] + ldr w24, [tsk, #TI_PREEMPT] // get preempt count + add w23, w24, #1 // increment it + str w23, [tsk, #TI_PREEMPT] #endif irq_handler #ifdef CONFIG_PREEMPT - ldr x0, [tsk, #TI_PREEMPT] - str x24, [tsk, #TI_PREEMPT] - cmp x0, x23 + ldr w0, [tsk, #TI_PREEMPT] + str w24, [tsk, #TI_PREEMPT] + cmp w0, w23 b.eq 1f mov x1, #0 str x1, [x1] // BUG @@ -641,8 +646,9 @@ el0_svc_naked: // compat entry point enable_irq get_thread_info tsk - ldr x16, [tsk, #TI_FLAGS] // check for syscall tracing - tbnz x16, #TIF_SYSCALL_TRACE, __sys_trace // are we tracing syscalls? + ldr x16, [tsk, #TI_FLAGS] // check for syscall hooks + tst x16, #_TIF_SYSCALL_WORK + b.ne __sys_trace adr lr, ret_fast_syscall // return address cmp scno, sc_nr // check upper syscall limit b.hs ni_sys @@ -658,9 +664,8 @@ ENDPROC(el0_svc) * switches, and waiting for our parent to respond. */ __sys_trace: - mov x1, sp - mov w0, #0 // trace entry - bl syscall_trace + mov x0, sp + bl syscall_trace_enter adr lr, __sys_trace_return // return address uxtw scno, w0 // syscall number (possibly new) mov x1, sp // pointer to regs @@ -675,9 +680,8 @@ __sys_trace: __sys_trace_return: str x0, [sp] // save returned x0 - mov x1, sp - mov w0, #1 // trace exit - bl syscall_trace + mov x0, sp + bl syscall_trace_exit b ret_to_user /* |