diff options
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 241 |
1 files changed, 103 insertions, 138 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 340b5e8..8474f9e 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -37,6 +37,8 @@ #include <asm/unistd.h> #include <asm/thread_info.h> +#include <linux/linkage.h> + #ifdef CONFIG_64BIT #define CMPIB cmpib,* #define CMPB cmpb,* @@ -648,13 +650,11 @@ * the static part of the kernel address space. */ - .export fault_vector_20 - .text .align 4096 -fault_vector_20: +ENTRY(fault_vector_20) /* First vector is invalid (0) */ .ascii "cows can fly" .byte 0 @@ -695,14 +695,13 @@ fault_vector_20: def 29 def 30 def 31 +END(fault_vector_20) #ifndef CONFIG_64BIT - .export fault_vector_11 - .align 2048 -fault_vector_11: +ENTRY(fault_vector_11) /* First vector is invalid (0) */ .ascii "cows can fly" .byte 0 @@ -743,6 +742,7 @@ fault_vector_11: def 29 def 30 def 31 +END(fault_vector_11) #endif @@ -762,9 +762,8 @@ fault_vector_11: #define CLONE_VM 0x100 /* Must agree with <linux/sched.h> */ #define CLONE_UNTRACED 0x00800000 - .export __kernel_thread, code .import do_fork -__kernel_thread: +ENTRY(__kernel_thread) STREG %r2, -RP_OFFSET(%r30) copy %r30, %r1 @@ -797,6 +796,7 @@ __kernel_thread: ldo -PT_SZ_ALGN(%r30), %r30 bv %r0(%r2) nop +ENDPROC(__kernel_thread) /* * Child Returns here @@ -805,8 +805,7 @@ __kernel_thread: * into task save area. */ - .export ret_from_kernel_thread -ret_from_kernel_thread: +ENTRY(ret_from_kernel_thread) /* Call schedule_tail first though */ BL schedule_tail, %r2 @@ -833,10 +832,10 @@ ret_from_kernel_thread: bv %r0(%r1) #endif ldi 0, %r26 +ENDPROC(ret_from_kernel_thread) .import sys_execve, code - .export __execve, code -__execve: +ENTRY(__execve) copy %r2, %r15 copy %r30, %r16 ldo PT_SZ_ALGN(%r30), %r30 @@ -856,16 +855,15 @@ __execve: copy %r16, %r30 bv %r0(%r2) nop +ENDPROC(__execve) - .align 4 /* * struct task_struct *_switch_to(struct task_struct *prev, * struct task_struct *next) * * switch kernel stacks and return prev */ - .export _switch_to, code -_switch_to: +ENTRY(_switch_to) STREG %r2, -RP_OFFSET(%r30) callee_save_float @@ -890,6 +888,7 @@ _switch_to_ret: LDREG -RP_OFFSET(%r30), %r2 bv %r0(%r2) copy %r26, %r28 +ENDPROC(_switch_to) /* * Common rfi return path for interruptions, kernel execve, and @@ -907,8 +906,7 @@ _switch_to_ret: .align 4096 - .export syscall_exit_rfi -syscall_exit_rfi: +ENTRY(syscall_exit_rfi) mfctl %cr30,%r16 LDREG TI_TASK(%r16), %r16 /* thread_info -> task_struct */ ldo TASK_REGS(%r16),%r16 @@ -978,11 +976,36 @@ 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 + ldi (_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=,n 0,%r20,intr_restore /* backward */ + LDREG PT_IASQ1(%r16), %r20 + CMPIB=,n 0,%r20,intr_restore /* backward */ + + 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,n intr_check_sig intr_restore: copy %r16,%r29 @@ -1072,35 +1095,6 @@ 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. */ @@ -1115,11 +1109,7 @@ intr_extint: mfctl %cr31,%r1 copy %r30,%r17 /* FIXME! depi below has hardcoded idea of interrupt stack size (32k)*/ -#ifdef CONFIG_64BIT - depdi 0,63,15,%r17 -#else - depi 0,31,15,%r17 -#endif + DEPI 0,31,15,%r17 CMPB=,n %r1,%r17,2f get_stack_use_cr31 b,n 3f @@ -1148,13 +1138,12 @@ intr_extint: b do_cpu_irq_mask ldo R%intr_return(%r2), %r2 /* return to intr_return, not here */ +ENDPROC(syscall_exit_rfi) /* Generic interruptions (illegal insn, unaligned, page fault, etc) */ - .export intr_save, code /* for os_hpmc */ - -intr_save: +ENTRY(intr_save) /* for os_hpmc */ mfsp %sr7,%r16 CMPIB=,n 0,%r16,1f get_stack_use_cr30 @@ -1229,6 +1218,7 @@ skip_save_ior: b handle_interruption ldo R%intr_check_sig(%r2), %r2 +ENDPROC(intr_save) /* @@ -1814,9 +1804,7 @@ dtlb_fault: LDREG PT_GR18(\regs),%r18 .endm - .export sys_fork_wrapper - .export child_return -sys_fork_wrapper: +ENTRY(sys_fork_wrapper) LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30), %r1 ldo TASK_REGS(%r1),%r1 reg_save %r1 @@ -1853,9 +1841,10 @@ wrapper_exit: ldi __NR_fork,%r20 bv %r0(%r2) STREG %r20,PT_GR20(%r1) +ENDPROC(sys_fork_wrapper) /* Set the return value for the child */ -child_return: +ENTRY(child_return) BL schedule_tail, %r2 nop @@ -1863,10 +1852,10 @@ child_return: LDREG TASK_PT_GR19(%r1),%r2 b wrapper_exit copy %r0,%r28 +ENDPROC(child_return) - - .export sys_clone_wrapper -sys_clone_wrapper: + +ENTRY(sys_clone_wrapper) LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 ldo TASK_REGS(%r1),%r1 /* get pt regs */ reg_save %r1 @@ -1887,9 +1876,10 @@ sys_clone_wrapper: b wrapper_exit LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2 +ENDPROC(sys_clone_wrapper) + - .export sys_vfork_wrapper -sys_vfork_wrapper: +ENTRY(sys_vfork_wrapper) LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 ldo TASK_REGS(%r1),%r1 /* get pt regs */ reg_save %r1 @@ -1910,6 +1900,7 @@ sys_vfork_wrapper: b wrapper_exit LDREG -RP_OFFSET-FRAME_SIZE(%r30),%r2 +ENDPROC(sys_vfork_wrapper) .macro execve_wrapper execve @@ -1946,22 +1937,19 @@ error_\execve: nop .endm - .export sys_execve_wrapper .import sys_execve - -sys_execve_wrapper: +ENTRY(sys_execve_wrapper) execve_wrapper sys_execve +ENDPROC(sys_execve_wrapper) #ifdef CONFIG_64BIT - .export sys32_execve_wrapper .import sys32_execve - -sys32_execve_wrapper: +ENTRY(sys32_execve_wrapper) execve_wrapper sys32_execve +ENDPROC(sys32_execve_wrapper) #endif - .export sys_rt_sigreturn_wrapper -sys_rt_sigreturn_wrapper: +ENTRY(sys_rt_sigreturn_wrapper) LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26 ldo TASK_REGS(%r26),%r26 /* get pt regs */ /* Don't save regs, we are going to restore them from sigcontext. */ @@ -1989,9 +1977,9 @@ sys_rt_sigreturn_wrapper: */ bv %r0(%r2) LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */ +ENDPROC(sys_rt_sigreturn_wrapper) - .export sys_sigaltstack_wrapper -sys_sigaltstack_wrapper: +ENTRY(sys_sigaltstack_wrapper) /* Get the user stack pointer */ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 ldo TASK_REGS(%r1),%r24 /* get pt regs */ @@ -1999,10 +1987,10 @@ sys_sigaltstack_wrapper: STREG %r2, -RP_OFFSET(%r30) #ifdef CONFIG_64BIT ldo FRAME_SIZE(%r30), %r30 - b,l do_sigaltstack,%r2 + BL do_sigaltstack,%r2 ldo -16(%r30),%r29 /* Reference param save area */ #else - bl do_sigaltstack,%r2 + BL do_sigaltstack,%r2 ldo FRAME_SIZE(%r30), %r30 #endif @@ -2010,53 +1998,26 @@ sys_sigaltstack_wrapper: LDREG -RP_OFFSET(%r30), %r2 bv %r0(%r2) nop +ENDPROC(sys_sigaltstack_wrapper) #ifdef CONFIG_64BIT - .export sys32_sigaltstack_wrapper -sys32_sigaltstack_wrapper: +ENTRY(sys32_sigaltstack_wrapper) /* Get the user stack pointer */ LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24 LDREG TASK_PT_GR30(%r24),%r24 STREG %r2, -RP_OFFSET(%r30) ldo FRAME_SIZE(%r30), %r30 - b,l do_sigaltstack32,%r2 + BL do_sigaltstack32,%r2 ldo -16(%r30),%r29 /* Reference param save area */ ldo -FRAME_SIZE(%r30), %r30 LDREG -RP_OFFSET(%r30), %r2 bv %r0(%r2) nop +ENDPROC(sys32_sigaltstack_wrapper) #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 - b,l 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: - +ENTRY(syscall_exit) /* NOTE: HP-UX syscalls also come through here * after hpux_syscall_exit fixes up return * values. */ @@ -2119,9 +2080,35 @@ 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 + ldi (_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? */ @@ -2259,31 +2246,10 @@ syscall_do_resched: #endif b syscall_check_bh /* if resched, we start over again */ nop +ENDPROC(syscall_exit) - .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: /* * get_register is used by the non access tlb miss handlers to * copy the value of the general register specified in r8 into @@ -2294,8 +2260,6 @@ syscall_do_signal: * a -1 in it, but that is OK, it just means that we will have * to use the slow path instead). */ - -get_register: blr %r8,%r0 nop bv %r0(%r25) /* r0 */ @@ -2363,13 +2327,13 @@ get_register: bv %r0(%r25) /* r31 */ copy %r31,%r1 + +set_register: /* * set_register is used by the non access tlb miss handlers to * copy the value of r1 into the general register specified in * r8. */ - -set_register: blr %r8,%r0 nop bv %r0(%r25) /* r0 (silly, but it is a place holder) */ @@ -2436,3 +2400,4 @@ set_register: copy %r1,%r30 bv %r0(%r25) /* r31 */ copy %r1,%r31 + |
