diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 141 |
1 files changed, 58 insertions, 83 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 39a12c1fc6f5..f965673e6863 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -978,11 +978,39 @@ intr_check_resched: LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */ bb,<,n %r19,31-TIF_NEED_RESCHED,intr_do_resched /* forward */ + .import do_notify_resume,code intr_check_sig: /* As above */ mfctl %cr30,%r1 - LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_SIGPENDING */ - bb,<,n %r19, 31-TIF_SIGPENDING, intr_do_signal /* forward */ + LDREG TI_FLAGS(%r1),%r19 + load32 (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK), %r20 + and,COND(<>) %r19, %r20, %r0 + b,n intr_restore /* skip past if we've nothing to do */ + + /* This check is critical to having LWS + * working. The IASQ is zero on the gateway + * page and we cannot deliver any signals until + * we get off the gateway page. + * + * Only do signals if we are returning to user space + */ + LDREG PT_IASQ0(%r16), %r20 + CMPIB= 0,%r20,intr_restore /* backward */ + nop + LDREG PT_IASQ1(%r16), %r20 + CMPIB= 0,%r20,intr_restore /* backward */ + nop + + copy %r0, %r25 /* long in_syscall = 0 */ +#ifdef CONFIG_64BIT + ldo -16(%r30),%r29 /* Reference param save area */ +#endif + + BL do_notify_resume,%r2 + copy %r16, %r26 /* struct pt_regs *regs */ + + b intr_check_sig + nop intr_restore: copy %r16,%r29 @@ -1072,35 +1100,6 @@ intr_do_preempt: b,n intr_restore /* ssm PSW_SM_I done by intr_restore */ #endif /* CONFIG_PREEMPT */ - .import do_signal,code -intr_do_signal: - /* - This check is critical to having LWS - working. The IASQ is zero on the gateway - page and we cannot deliver any signals until - we get off the gateway page. - - Only do signals if we are returning to user space - */ - LDREG PT_IASQ0(%r16), %r20 - CMPIB= 0,%r20,intr_restore /* backward */ - nop - LDREG PT_IASQ1(%r16), %r20 - CMPIB= 0,%r20,intr_restore /* backward */ - nop - - copy %r0, %r24 /* unsigned long in_syscall */ - copy %r16, %r25 /* struct pt_regs *regs */ -#ifdef CONFIG_64BIT - ldo -16(%r30),%r29 /* Reference param save area */ -#endif - - BL do_signal,%r2 - copy %r0, %r26 /* sigset_t *oldset = NULL */ - - b intr_check_sig - nop - /* * External interrupts. */ @@ -2024,32 +2023,6 @@ sys32_sigaltstack_wrapper: nop #endif - .export sys_rt_sigsuspend_wrapper -sys_rt_sigsuspend_wrapper: - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1 - ldo TASK_REGS(%r1),%r24 - reg_save %r24 - - STREG %r2, -RP_OFFSET(%r30) -#ifdef CONFIG_64BIT - ldo FRAME_SIZE(%r30), %r30 - BL sys_rt_sigsuspend,%r2 - ldo -16(%r30),%r29 /* Reference param save area */ -#else - BL sys_rt_sigsuspend,%r2 - ldo FRAME_SIZE(%r30), %r30 -#endif - - ldo -FRAME_SIZE(%r30), %r30 - LDREG -RP_OFFSET(%r30), %r2 - - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1 - ldo TASK_REGS(%r1),%r1 - reg_restore %r1 - - bv %r0(%r2) - nop - .export syscall_exit syscall_exit: @@ -2115,9 +2088,35 @@ syscall_check_resched: LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* long */ bb,<,n %r19, 31-TIF_NEED_RESCHED, syscall_do_resched /* forward */ + .import do_signal,code syscall_check_sig: - LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 /* get ti flags */ - bb,<,n %r19, 31-TIF_SIGPENDING, syscall_do_signal /* forward */ + LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 + load32 (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK), %r26 + and,COND(<>) %r19, %r26, %r0 + b,n syscall_restore /* skip past if we've nothing to do */ + +syscall_do_signal: + /* Save callee-save registers (for sigcontext). + * FIXME: After this point the process structure should be + * consistent with all the relevant state of the process + * before the syscall. We need to verify this. + */ + LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 + ldo TASK_REGS(%r1), %r26 /* struct pt_regs *regs */ + reg_save %r26 + +#ifdef CONFIG_64BIT + ldo -16(%r30),%r29 /* Reference param save area */ +#endif + + BL do_notify_resume,%r2 + ldi 1, %r25 /* long in_syscall = 1 */ + + LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 + ldo TASK_REGS(%r1), %r20 /* reload pt_regs */ + reg_restore %r20 + + b,n syscall_check_sig syscall_restore: /* Are we being ptraced? */ @@ -2256,30 +2255,6 @@ syscall_do_resched: b syscall_check_bh /* if resched, we start over again */ nop - .import do_signal,code -syscall_do_signal: - /* Save callee-save registers (for sigcontext). - FIXME: After this point the process structure should be - consistent with all the relevant state of the process - before the syscall. We need to verify this. */ - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 - ldo TASK_REGS(%r1), %r25 /* struct pt_regs *regs */ - reg_save %r25 - - ldi 1, %r24 /* unsigned long in_syscall */ - -#ifdef CONFIG_64BIT - ldo -16(%r30),%r29 /* Reference param save area */ -#endif - BL do_signal,%r2 - copy %r0, %r26 /* sigset_t *oldset = NULL */ - - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 - ldo TASK_REGS(%r1), %r20 /* reload pt_regs */ - reg_restore %r20 - - b,n syscall_check_sig - /* * get_register is used by the non access tlb miss handlers to * copy the value of the general register specified in r8 into |
