diff options
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/kernel/entry.S | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 8d671898d582..6b6eff658795 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -491,9 +491,9 @@ common_exception_return: l32i abi_tmp0, a1, PT_EXCCAUSE movi abi_tmp1, EXCCAUSE_MAPPED_NMI l32i abi_saved1, a1, PT_PS - beq abi_tmp0, abi_tmp1, 4f + beq abi_tmp0, abi_tmp1, .Lrestore_state #endif -1: +.Ltif_loop: irq_save a2, a3 #ifdef CONFIG_TRACE_IRQFLAGS abi_call trace_hardirqs_off @@ -504,7 +504,7 @@ common_exception_return: l32i abi_saved1, a1, PT_PS GET_THREAD_INFO(a2, a1) l32i a4, a2, TI_FLAGS - _bbci.l abi_saved1, PS_UM_BIT, 6f + _bbci.l abi_saved1, PS_UM_BIT, .Lexit_tif_loop_kernel /* Specific to a user exception exit: * We need to check some flags for signal handling and rescheduling, @@ -513,12 +513,12 @@ common_exception_return: * Note that we don't disable interrupts here. */ - _bbsi.l a4, TIF_NEED_RESCHED, 3f + _bbsi.l a4, TIF_NEED_RESCHED, .Lresched movi a2, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL - bnone a4, a2, 5f + bnone a4, a2, .Lexit_tif_loop_user -2: l32i a4, a1, PT_DEPC - bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f + l32i a4, a1, PT_DEPC + bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state /* Call do_signal() */ @@ -528,42 +528,41 @@ common_exception_return: rsil a2, 0 mov abi_arg0, a1 abi_call do_notify_resume # int do_notify_resume(struct pt_regs*) - j 1b - -3: /* Reschedule */ + j .Ltif_loop +.Lresched: #ifdef CONFIG_TRACE_IRQFLAGS abi_call trace_hardirqs_on #endif rsil a2, 0 abi_call schedule # void schedule (void) - j 1b + j .Ltif_loop +.Lexit_tif_loop_kernel: #ifdef CONFIG_PREEMPTION -6: - _bbci.l a4, TIF_NEED_RESCHED, 4f + _bbci.l a4, TIF_NEED_RESCHED, .Lrestore_state /* Check current_thread_info->preempt_count */ l32i a4, a2, TI_PRE_COUNT - bnez a4, 4f + bnez a4, .Lrestore_state abi_call preempt_schedule_irq - j 4f #endif + j .Lrestore_state -5: +.Lexit_tif_loop_user: #ifdef CONFIG_HAVE_HW_BREAKPOINT - _bbci.l a4, TIF_DB_DISABLED, 7f + _bbci.l a4, TIF_DB_DISABLED, 1f abi_call restore_dbreak -7: +1: #endif #ifdef CONFIG_DEBUG_TLB_SANITY l32i a4, a1, PT_DEPC - bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f + bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, .Lrestore_state abi_call check_tlb_sanity #endif -6: -4: + +.Lrestore_state: #ifdef CONFIG_TRACE_IRQFLAGS extui a4, abi_saved1, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH bgei a4, LOCKLEVEL, 1f @@ -601,7 +600,7 @@ user_exception_exit: rsr a1, depc # restore stack pointer l32i a2, a1, PT_WMASK # register frames saved (in bits 4...9) rotw -1 # we restore a4..a7 - _bltui a6, 16, 1f # only have to restore current window? + _bltui a6, 16, .Lclear_regs # only have to restore current window? /* The working registers are a0 and a3. We are restoring to * a4..a7. Be careful not to destroy what we have just restored. @@ -613,18 +612,19 @@ user_exception_exit: mov a2, a6 mov a3, a5 -2: rotw -1 # a0..a3 become a4..a7 +1: rotw -1 # a0..a3 become a4..a7 addi a3, a7, -4*4 # next iteration addi a2, a6, -16 # decrementing Y in WMASK l32i a4, a3, PT_AREG_END + 0 l32i a5, a3, PT_AREG_END + 4 l32i a6, a3, PT_AREG_END + 8 l32i a7, a3, PT_AREG_END + 12 - _bgeui a2, 16, 2b + _bgeui a2, 16, 1b /* Clear unrestored registers (don't leak anything to user-land */ -1: rsr a0, windowbase +.Lclear_regs: + rsr a0, windowbase rsr a3, sar sub a3, a0, a3 beqz a3, 2f |