diff options
Diffstat (limited to 'arch/cris/arch-v10/kernel/entry.S')
| -rw-r--r-- | arch/cris/arch-v10/kernel/entry.S | 536 |
1 files changed, 178 insertions, 358 deletions
diff --git a/arch/cris/arch-v10/kernel/entry.S b/arch/cris/arch-v10/kernel/entry.S index ae45d4522e6..81570fcd041 100644 --- a/arch/cris/arch-v10/kernel/entry.S +++ b/arch/cris/arch-v10/kernel/entry.S @@ -1,252 +1,9 @@ -/* $Id: entry.S,v 1.28 2005/06/20 05:06:30 starvik Exp $ - * +/* * linux/arch/cris/entry.S * * Copyright (C) 2000, 2001, 2002 Axis Communications AB * * Authors: Bjorn Wesen (bjornw@axis.com) - * - * $Log: entry.S,v $ - * Revision 1.28 2005/06/20 05:06:30 starvik - * Remove unnecessary diff to kernel.org tree - * - * Revision 1.27 2005/03/04 08:16:16 starvik - * Merge of Linux 2.6.11. - * - * Revision 1.26 2005/01/11 13:49:47 starvik - * Added NMI handler. - * - * Revision 1.25 2004/12/27 11:18:32 starvik - * Merge of Linux 2.6.10 (not functional yet). - * - * Revision 1.24 2004/12/22 10:41:23 starvik - * Updates to make v10 compile with the latest SMP aware generic code (even - * though v10 will never have SMP). - * - * Revision 1.23 2004/10/19 13:07:37 starvik - * Merge of Linux 2.6.9 - * - * Revision 1.22 2004/06/21 10:29:55 starvik - * Merge of Linux 2.6.7 - * - * Revision 1.21 2004/06/09 05:30:27 starvik - * Clean up multiple interrupt handling. - * Prevent interrupts from interrupting each other. - * Handle all active interrupts. - * - * Revision 1.20 2004/06/08 08:55:32 starvik - * Removed unused code - * - * Revision 1.19 2004/06/04 11:56:15 starvik - * Implemented page table lookup for refills in assembler for improved performance. - * - * Revision 1.18 2004/05/11 12:28:25 starvik - * Merge of Linux 2.6.6 - * - * Revision 1.17 2003/09/11 07:29:49 starvik - * Merge of Linux 2.6.0-test5 - * - * Revision 1.16 2003/07/04 08:27:41 starvik - * Merge of Linux 2.5.74 - * - * Revision 1.15 2003/04/09 07:32:55 starvik - * resume should return task_struct, not thread_info - * - * Revision 1.14 2003/04/09 05:20:44 starvik - * Merge of Linux 2.5.67 - * - * Revision 1.13 2002/12/11 15:42:02 starvik - * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/*.c - * - * Revision 1.12 2002/12/10 09:00:10 starvik - * Merge of Linux 2.5.51 - * - * Revision 1.11 2002/12/05 07:53:10 starvik - * Corrected constants used with btstq - * - * Revision 1.10 2002/11/27 08:45:10 starvik - * pid is in task_struct, not thread_info - * - * Revision 1.9 2002/11/26 09:52:05 starvik - * Added preemptive kernel scheduling (if CONFIG_PREEMPT) - * - * Revision 1.8 2002/11/20 11:56:11 starvik - * Merge of Linux 2.5.48 - * - * Revision 1.7 2002/11/18 13:02:42 starvik - * Added fourth parameter to do_notify_resume - * Minor cleanup - * - * Revision 1.6 2002/11/11 10:37:50 starvik - * Use new asm-offset defines - * Modified for new location of current->work etc - * Removed SYMBOL_NAME from syscalls - * Added some new syscalls - * - * Revision 1.5 2002/11/05 06:45:11 starvik - * Merge of Linux 2.5.45 - * - * Revision 1.4 2002/02/05 15:41:31 bjornw - * Rewritten to conform better to current 2.5 code (similar to arch/i386) - * - * Revision 1.3 2002/01/21 15:22:20 bjornw - * NICE_DOGGY fix from 2.4 arch/cris - * - * Revision 1.37 2001/12/07 17:03:55 bjornw - * Call a c-hook called watchdog_bite_hook instead of show_registers directly - * - * Revision 1.36 2001/11/22 13:36:36 bjornw - * * In ret_from_intr, check regs->dccr for usermode reentrance instead of - * DCCR explicitely (because the latter might not reflect current reality) - * * In mmu_bus_fault, set $r9 _after_ calling the C-code instead of before - * since $r9 is call-clobbered and is potentially needed afterwards - * - * Revision 1.35 2001/10/30 17:10:15 bjornw - * Add some syscalls - * - * Revision 1.34 2001/10/01 14:45:03 bjornw - * Removed underscores and added register prefixes - * - * Revision 1.33 2001/08/21 13:48:01 jonashg - * Added fix by HP to avoid oops when doing a hard_reset_now. - * - * Revision 1.32 2001/08/14 04:32:02 hp - * In _resume, add comment why R9 is saved; don't sound like it's call-saved. - * - * Revision 1.31 2001/07/25 16:07:42 bjornw - * softirq_active/mask -> softirq_pending only - * - * Revision 1.30 2001/07/05 01:03:32 hp - * - include asm/errno.h to get ENOSYS. - * - Use ENOSYS, not local constant LENOSYS; tweak comments. - * - Explain why .include, not #include is used. - * - Make oops-register-dump if watchdog bits and it's not expected. - * - Don't jsr, use jump _hard_reset_now, and skip spurious nop. - * - Use correct section attribute for section .rodata. - * - Adjust sys_ni_syscall fill number. - * - * Revision 1.29 2001/06/25 14:07:00 hp - * Fix review comment. - * * head.S: Use IO_STATE, IO_FIELD and IO_MASK constructs instead of - * magic numbers. Add comment that -traditional must not be used. - * * entry.S (SYMBOL_NAME): Change redefinition to use ## concatenation. - * Correct and update comment. - * * Makefile (.S.o): Don't use -traditional. Add comment why the - * toplevel rule can't be used (now that there's a reason). - * - * Revision 1.28 2001/06/21 02:00:40 hp - * * entry.S: Include asm/unistd.h. - * (_sys_call_table): Use section .rodata, not .data. - * (_kernel_thread): Move from... - * * process.c: ... here. - * * entryoffsets.c (VAL): Break out from... - * (OF): Use VAL. - * (LCLONE_VM): New asmified value from CLONE_VM. - * - * Revision 1.27 2001/05/29 11:25:27 markusl - * In case of "spurious_interrupt", do hard_reset instead of hanging system in a loop... - * - * Revision 1.26 2001/05/15 15:46:03 bjornw - * Include config.h now that we use some CONFIG_ options - * - * Revision 1.25 2001/05/15 05:38:47 hp - * Tweaked code in _ret_from_sys_call - * - * Revision 1.24 2001/05/15 05:27:49 hp - * Save r9 in r1 over function call rather than on stack. - * - * Revision 1.23 2001/05/15 05:10:00 hp - * Generate entry.S structure offsets from C - * - * Revision 1.22 2001/04/17 13:58:39 orjanf - * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB. - * - * Revision 1.21 2001/04/17 11:33:29 orjanf - * Updated according to review: - * * Included asm/sv_addr_ag.h to get macro for internal register. - * * Corrected comment regarding system call argument passing. - * * Removed comment about instruction being in a delay slot. - * * Added comment about SYMBOL_NAME macro. - * - * Revision 1.20 2001/04/12 08:51:07 hp - * - Add entry for sys_fcntl64. In fact copy last piece from i386 including ... - * - .rept to fill table to safe state with sys_ni_syscall. - * - * Revision 1.19 2001/04/04 09:43:32 orjanf - * * Moved do_sigtrap from traps.c to entry.S. - * * LTASK_PID need not be global anymore. - * - * Revision 1.18 2001/03/26 09:25:02 markusl - * Updated after review, should now handle USB interrupts correctly. - * - * Revision 1.17 2001/03/21 16:12:55 bjornw - * * Always make room for the cpu status record in the frame, in order to - * use the same framelength and layout for both mmu busfaults and normal - * irqs. No need to check for the explicit CRIS_FRAME_FIXUP type anymore. - * * Fixed bug with using addq for popping the stack in the epilogue - it - * destroyed the flag register. Use instructions that don't affect the - * flag register instead. - * * Removed write to R_PORT_PA_DATA during spurious_interrupt - * - * Revision 1.16 2001/03/20 19:43:02 bjornw - * * Get rid of esp0 setting - * * Give a 7th argument to a systemcall - the stackframe - * - * Revision 1.15 2001/03/05 13:14:30 bjornw - * Spelling fix - * - * Revision 1.14 2001/02/23 08:36:36 perf - * New ABI; syscallnr=r9, arg5=mof, arg6=srp. - * Corrected tracesys call check. - * - * Revision 1.13 2001/02/15 08:40:55 perf - * H-P by way of perf; - * - (_system_call): Don't read system call function address into r1. - * - (RBFExit): There is no such thing as a null pop. Adjust sp by addq. - * - (_system_call): Don't use r10 and don't save and restore it. - * - (THREAD_ESP0): New constant. - * - (_system_call): Inline set_esp0. - * - * Revision 1.12 2001/01/31 17:56:25 orjanf - * Added definition of LTASK_PID and made it global. - * - * Revision 1.11 2001/01/10 21:13:29 bjornw - * SYMBOL_NAME is defined incorrectly for the compiler options we currently use - * - * Revision 1.10 2000/12/18 23:47:56 bjornw - * * Added syscall trace support (ptrace), completely untested of course - * * Removed redundant check for NULL entries in syscall_table - * - * Revision 1.9 2000/11/21 16:40:51 bjornw - * * New frame type used when an SBFS frame needs to be popped without - * actually restarting the instruction - * * Enable interrupts in signal_return (they did so in x86, I hope it's a good - * idea) - * - * Revision 1.8 2000/11/17 16:53:35 bjornw - * Added detection of frame-type in Rexit, so that mmu_bus_fault can - * use ret_from_intr in the return-path to check for signals (like SEGV) - * and other foul things that might have occurred during the fault. - * - * Revision 1.7 2000/10/06 15:04:28 bjornw - * Include mof in register savings - * - * Revision 1.6 2000/09/12 16:02:44 bjornw - * Linux-2.4.0-test7 derived updates - * - * Revision 1.5 2000/08/17 15:35:15 bjornw - * 2.4.0-test6 changed local_irq_count and friends API - * - * Revision 1.4 2000/08/02 13:59:30 bjornw - * Removed olduname and uname from the syscall list - * - * Revision 1.3 2000/07/31 13:32:58 bjornw - * * Export ret_from_intr - * * _resume updated (prev/last tjohejsan) - * * timer_interrupt obsolete - * * SIGSEGV detection in mmu_bus_fault temporarily disabled - * - * */ /* @@ -256,8 +13,8 @@ * after a timer-interrupt and after each system call. * * Stack layout in 'ret_from_system_call': - * ptrace needs to have all regs on the stack. - * if the order here is changed, it needs to be + * ptrace needs to have all regs on the stack. + * if the order here is changed, it needs to be * updated in fork.c:copy_process, signal.c:do_signal, * ptrace.c and ptrace.h * @@ -266,7 +23,7 @@ #include <linux/linkage.h> #include <linux/sys.h> #include <asm/unistd.h> -#include <asm/arch/sv_addr_ag.h> +#include <arch/sv_addr_ag.h> #include <asm/errno.h> #include <asm/thread_info.h> #include <asm/asm-offsets.h> @@ -274,10 +31,11 @@ #include <asm/pgtable.h> ;; functions exported from this file - + .globl system_call .globl ret_from_intr .globl ret_from_fork + .globl ret_from_kernel_thread .globl resume .globl multiple_interrupt .globl hwbreakpoint @@ -288,10 +46,10 @@ .globl do_sigtrap .globl gdb_handle_breakpoint .globl sys_call_table - + ;; below are various parts of system_call which are not in the fast-path - -#ifdef CONFIG_PREEMPT + +#ifdef CONFIG_PREEMPT ; Check if preemptive kernel scheduling should be done _resume_kernel: di @@ -316,7 +74,7 @@ _need_resched: nop #else #define _resume_kernel _Rexit -#endif +#endif ; Called at exit from fork. schedule_tail must be called to drop ; spinlock if CONFIG_PREEMPT @@ -324,18 +82,25 @@ ret_from_fork: jsr schedule_tail ba ret_from_sys_call nop - + +ret_from_kernel_thread: + jsr schedule_tail + move.d $r2, $r10 ; argument is here + jsr $r1 ; call the payload + moveq 0, $r9 ; no syscall restarts, TYVM... + ba ret_from_sys_call + ret_from_intr: - ;; check for resched if preemptive kernel or if we're going back to user-mode + ;; check for resched if preemptive kernel or if we're going back to user-mode ;; this test matches the user_regs(regs) macro ;; we cannot simply test $dccr, because that does not necessarily ;; reflect what mode we'll return into. - + move.d [$sp + PT_dccr], $r0; regs->dccr btstq 8, $r0 ; U-flag bpl _resume_kernel - ; Note that di below is in delay slot - + ; Note that di below is in delay slot + _resume_userspace: di ; so need_resched and sigpending don't change @@ -348,7 +113,7 @@ _resume_userspace: nop ba _Rexit nop - + ;; The system_call is called by a BREAK instruction, which works like ;; an interrupt call but it stores the return PC in BRP instead of IRP. ;; Since we dont really want to have two epilogues (one for system calls @@ -358,7 +123,7 @@ _resume_userspace: ;; ;; Since we can't have system calls inside interrupts, it should not matter ;; that we don't stack IRP. - ;; + ;; ;; In r9 we have the wanted syscall number. Arguments come in r10,r11,r12,r13,mof,srp ;; ;; This function looks on the _surface_ like spaghetti programming, but it's @@ -375,7 +140,7 @@ system_call: movem $r13, [$sp] ; push r0-r13 push $r10 ; push orig_r10 clear.d [$sp=$sp-4] ; frametype == 0, normal stackframe - + movs.w -ENOSYS, $r0 move.d $r0, [$sp+PT_r10] ; put the default return value in r10 in the frame @@ -383,17 +148,17 @@ system_call: movs.w -8192, $r0 ; THREAD_SIZE == 8192 and.d $sp, $r0 - + move.d [$r0+TI_flags], $r0 btstq TIF_SYSCALL_TRACE, $r0 bmi _syscall_trace_entry - nop + nop -_syscall_traced: +_syscall_traced: ;; check for sanity in the requested syscall number - - cmpu.w NR_syscalls, $r9 + + cmpu.w NR_syscalls, $r9 bcc ret_from_sys_call lslq 2, $r9 ; multiply by 4, in the delay slot @@ -401,28 +166,28 @@ _syscall_traced: ;; of the register structure itself. some syscalls need this. push $sp - + ;; the parameter carrying registers r10, r11, r12 and 13 are intact. - ;; the fifth and sixth parameters (if any) was in mof and srp + ;; the fifth and sixth parameters (if any) was in mof and srp ;; respectively, and we need to put them on the stack. push $srp push $mof - + jsr [$r9+sys_call_table] ; actually do the system call addq 3*4, $sp ; pop the mof, srp and regs parameters move.d $r10, [$sp+PT_r10] ; save the return value moveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys call - + ;; fall through into ret_from_sys_call to return - + ret_from_sys_call: ;; r9 is a parameter - if >=1 we came from a syscall, if 0, from an irq - + ;; get the current task-struct pointer (see top for defs) - movs.w -8192, $r0 ; THREAD_SIZE == 8192 + movs.w -8192, $r0 ; THREAD_SIZE == 8192 and.d $sp, $r0 di ; make sure need_resched and sigpending don't change @@ -437,7 +202,7 @@ _Rexit: bne _RBFexit ; was not CRIS_FRAME_NORMAL, handle otherwise addq 4, $sp ; skip orig_r10, in delayslot movem [$sp+], $r13 ; registers r0-r13 - pop $mof ; multiply overflow register + pop $mof ; multiply overflow register pop $dccr ; condition codes pop $srp ; subroutine return pointer ;; now we have a 4-word SBFS frame which we do not want to restore @@ -451,14 +216,14 @@ _Rexit: _RBFexit: movem [$sp+], $r13 ; registers r0-r13, in delay slot - pop $mof ; multiply overflow register + pop $mof ; multiply overflow register pop $dccr ; condition codes pop $srp ; subroutine return pointer rbf [$sp+] ; return by popping the CPU status ;; We get here after doing a syscall if extra work might need to be done ;; perform syscall exit tracing if needed - + _syscall_exit_work: ;; $r0 contains current at this point and irq's are disabled @@ -466,22 +231,22 @@ _syscall_exit_work: btstq TIF_SYSCALL_TRACE, $r1 bpl _work_pending nop - + ei move.d $r9, $r1 ; preserve r9 jsr do_syscall_trace move.d $r1, $r9 - + ba _resume_userspace nop - + _work_pending: move.d [$r0+TI_flags], $r1 btstq TIF_NEED_RESCHED, $r1 bpl _work_notifysig ; was neither trace nor sched, must be signal/notify nop - + _work_resched: move.d $r9, $r1 ; preserve r9 jsr schedule @@ -500,21 +265,20 @@ _work_notifysig: ;; deal with pending signals and notify-resume requests move.d $r9, $r10 ; do_notify_resume syscall/irq param - moveq 0, $r11 ; oldset param - 0 in this case - move.d $sp, $r12 ; the regs param - move.d $r1, $r13 ; the thread_info_flags parameter + move.d $sp, $r11 ; the regs param + move.d $r1, $r12 ; the thread_info_flags parameter jsr do_notify_resume - + ba _Rexit nop ;; We get here as a sidetrack when we've entered a syscall with the ;; trace-bit set. We need to call do_syscall_trace and then continue ;; with the call. - + _syscall_trace_entry: ;; PT_r10 in the frame contains -ENOSYS as required, at this point - + jsr do_syscall_trace ;; now re-enter the syscall code to do the syscall itself @@ -528,10 +292,10 @@ _syscall_trace_entry: move.d [$sp+PT_r13], $r13 move [$sp+PT_mof], $mof move [$sp+PT_srp], $srp - + ba _syscall_traced nop - + ;; resume performs the actual task-switching, by switching stack pointers ;; input arguments: r10 = prev, r11 = next, r12 = thread offset in task struct ;; returns old current in r10 @@ -539,29 +303,29 @@ _syscall_trace_entry: ;; TODO: see the i386 version. The switch_to which calls resume in our version ;; could really be an inline asm of this. -resume: - push $srp ; we keep the old/new PC on the stack +resume: + push $srp ; we keep the old/new PC on the stack add.d $r12, $r10 ; r10 = current tasks tss move $dccr, [$r10+THREAD_dccr]; save irq enable state di move $usp, [$r10+ THREAD_usp] ; save user-mode stackpointer - + ;; See copy_thread for the reason why register R9 is saved. subq 10*4, $sp movem $r9, [$sp] ; save non-scratch registers and R9. - + move.d $sp, [$r10+THREAD_ksp] ; save the kernel stack pointer for the old task move.d $sp, $r10 ; return last running task in r10 and.d -8192, $r10 ; get thread_info from stackpointer - move.d [$r10+TI_task], $r10 ; get task + move.d [$r10+TI_task], $r10 ; get task add.d $r12, $r11 ; find the new tasks tss move.d [$r11+THREAD_ksp], $sp ; switch into the new stackframe by restoring kernel sp movem [$sp+], $r9 ; restore non-scratch registers and R9. move [$r11+THREAD_usp], $usp ; restore user-mode stackpointer - + move [$r11+THREAD_dccr], $dccr ; restore irq enable status jump [$sp+] ; restore PC @@ -602,7 +366,7 @@ mmu_bus_fault: 1: btstq 12, $r1 ; Refill? bpl 2f lsrq 24, $r1 ; Get PGD index (bit 24-31) - move.d [per_cpu__current_pgd], $r0 ; PGD for the current process + move.d [current_pgd], $r0 ; PGD for the current process move.d [$r0+$r1.d], $r0 ; Get PMD beq 2f nop @@ -637,7 +401,7 @@ mmu_bus_fault: push $r10 ; frametype == 1, BUSFAULT frame type move.d $sp, $r10 ; pt_regs argument to handle_mmu_bus_fault - + jsr handle_mmu_bus_fault ; in arch/cris/arch-v10/mm/fault.c ;; now we need to return through the normal path, we cannot just @@ -646,10 +410,10 @@ mmu_bus_fault: ;; whatever. moveq 0, $r9 ; busfault is equivalent to an irq - + ba ret_from_intr nop - + ;; special handlers for breakpoint and NMI hwbreakpoint: push $dccr @@ -665,7 +429,7 @@ hwbreakpoint: pop $dccr retb nop - + IRQ1_interrupt: ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!! move $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame @@ -678,16 +442,22 @@ IRQ1_interrupt: push $r10 ; push orig_r10 clear.d [$sp=$sp-4] ; frametype == 0, normal frame + ;; If there is a glitch on the NMI pin shorter than ~100ns + ;; (i.e. non-active by the time we get here) then the nmi_pin bit + ;; in R_IRQ_MASK0_RD will already be cleared. The watchdog_nmi bit + ;; is cleared by us however (when feeding the watchdog), which is why + ;; we use that bit to determine what brought us here. + move.d [R_IRQ_MASK0_RD], $r1 ; External NMI or watchdog? - and.d 0x80000000, $r1 - beq wdog + and.d (1<<30), $r1 + bne wdog move.d $sp, $r10 jsr handle_nmi setf m ; Enable NMI again - retb ; Return from NMI + ba _Rexit ; Return the standard way nop wdog: -#if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM) +#if defined(CONFIG_ETRAX_WATCHDOG) ;; Check if we're waiting for reset to happen, as signalled by ;; hard_reset_now setting cause_of_death to a magic value. If so, just ;; get stuck until reset happens. @@ -730,7 +500,7 @@ Watchdog_bite: move.d $r10, [$r11] #endif - + ;; Note that we don't do "setf m" here (or after two necessary NOPs), ;; since *not* doing that saves us from re-entrancy checks. We don't want ;; to get here again due to possible subsequent NMIs; we want the watchdog @@ -753,16 +523,16 @@ _watchdogmsg: .ascii "Oops: bitten by watchdog\n\0" .previous -#endif /* CONFIG_ETRAX_WATCHDOG and not CONFIG_SVINTO_SIM */ +#endif /* CONFIG_ETRAX_WATCHDOG */ -spurious_interrupt: +spurious_interrupt: di jump hard_reset_now ;; this handles the case when multiple interrupts arrive at the same time ;; we jump to the first set interrupt bit in a priority fashion ;; the hardware will call the unserved interrupts after the handler finishes - + multiple_interrupt: ;; this prologue MUST match the one in irq.h and the struct in ptregs.h!!! move $irp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS frame @@ -774,27 +544,14 @@ multiple_interrupt: movem $r13, [$sp] push $r10 ; push orig_r10 clear.d [$sp=$sp-4] ; frametype == 0, normal frame - - moveq 2, $r2 ; first bit we care about is the timer0 irq - move.d [R_VECT_MASK_RD], $r0; read the irq bits that triggered the multiple irq - move.d $r0, [R_VECT_MASK_CLR] ; Block all active IRQs -1: - btst $r2, $r0 ; check for the irq given by bit r2 - bpl 2f - move.d $r2, $r10 ; First argument to do_IRQ - move.d $sp, $r11 ; second argument to do_IRQ - jsr do_IRQ -2: - addq 1, $r2 ; next vector bit - cmp.b 32, $r2 - bne 1b ; process all irq's up to and including number 31 - moveq 0, $r9 ; make ret_from_intr realise we came from an ir - - move.d $r0, [R_VECT_MASK_SET] ; Unblock all the IRQs + + move.d $sp, $r10 + jsr do_multiple_IRQ + jump ret_from_intr do_sigtrap: - ;; + ;; ;; SIGTRAP the process that executed the break instruction. ;; Make a frame that Rexit in entry.S expects. ;; @@ -811,32 +568,32 @@ do_sigtrap: movs.w -8192,$r9 ; THREAD_SIZE == 8192 and.d $sp, $r9 move.d [$r9+TI_task], $r10 - move.d [$r10+TASK_pid], $r10 ; current->pid as arg1. + move.d [$r10+TASK_pid], $r10 ; current->pid as arg1. moveq 5, $r11 ; SIGTRAP as arg2. - jsr sys_kill + jsr sys_kill jump ret_from_intr ; Use the return routine for interrupts. -gdb_handle_breakpoint: +gdb_handle_breakpoint: push $dccr push $r0 #ifdef CONFIG_ETRAX_KGDB - move $dccr, $r0 ; U-flag not affected by previous insns. + move $dccr, $r0 ; U-flag not affected by previous insns. btstq 8, $r0 ; Test the U-flag. - bmi _ugdb_handle_breakpoint ; Go to user mode debugging. - nop ; Empty delay slot (cannot pop r0 here). + bmi _ugdb_handle_breakpoint ; Go to user mode debugging. + nop ; Empty delay slot (cannot pop r0 here). pop $r0 ; Restore r0. - ba kgdb_handle_breakpoint ; Go to kernel debugging. + ba kgdb_handle_breakpoint ; Go to kernel debugging. pop $dccr ; Restore dccr in delay slot. #endif - -_ugdb_handle_breakpoint: + +_ugdb_handle_breakpoint: move $brp, $r0 ; Use r0 temporarily for calculation. subq 2, $r0 ; Set to address of previous instruction. move $r0, $brp - pop $r0 ; Restore r0. - ba do_sigtrap ; SIGTRAP the offending process. + pop $r0 ; Restore r0. + ba do_sigtrap ; SIGTRAP the offending process. pop $dccr ; Restore dccr in delay slot. - + .data hw_bp_trigs: @@ -845,7 +602,7 @@ hw_bp_trig_ptr: .dword hw_bp_trigs .section .rodata,"a" -sys_call_table: +sys_call_table: .long sys_restart_syscall /* 0 - old "setup()" system call, used for restarting */ .long sys_exit .long sys_fork @@ -935,8 +692,8 @@ sys_call_table: .long sys_uselib .long sys_swapon .long sys_reboot - .long old_readdir - .long old_mmap /* 90 */ + .long sys_old_readdir + .long sys_old_mmap /* 90 */ .long sys_munmap .long sys_truncate .long sys_ftruncate @@ -956,7 +713,7 @@ sys_call_table: .long sys_newlstat .long sys_newfstat .long sys_ni_syscall /* old sys_uname holder */ - .long sys_ni_syscall /* sys_iopl in i386 */ + .long sys_ni_syscall /* 110 */ /* sys_iopl in i386 */ .long sys_vhangup .long sys_ni_syscall /* old "idle" system call */ .long sys_ni_syscall /* vm86old in i386 */ @@ -973,7 +730,7 @@ sys_call_table: .long sys_adjtimex .long sys_mprotect /* 125 */ .long sys_sigprocmask - .long sys_ni_syscall /* old "create_module" */ + .long sys_ni_syscall /* old "create_module" */ .long sys_init_module .long sys_delete_module .long sys_ni_syscall /* 130: old "get_kernel_syms" */ @@ -1015,7 +772,7 @@ sys_call_table: .long sys_ni_syscall /* sys_vm86 */ .long sys_ni_syscall /* Old sys_query_module */ .long sys_poll - .long sys_nfsservctl + .long sys_ni_syscall /* old nfsservctl */ .long sys_setresgid16 /* 170 */ .long sys_getresgid16 .long sys_prctl @@ -1038,7 +795,7 @@ sys_call_table: .long sys_ni_syscall /* streams2 */ .long sys_vfork /* 190 */ .long sys_getrlimit - .long sys_mmap2 + .long sys_mmap2 /* mmap_pgoff */ .long sys_truncate64 .long sys_ftruncate64 .long sys_stat64 /* 195 */ @@ -1104,21 +861,21 @@ sys_call_table: .long sys_epoll_ctl /* 255 */ .long sys_epoll_wait .long sys_remap_file_pages - .long sys_set_tid_address - .long sys_timer_create - .long sys_timer_settime /* 260 */ - .long sys_timer_gettime - .long sys_timer_getoverrun - .long sys_timer_delete - .long sys_clock_settime - .long sys_clock_gettime /* 265 */ - .long sys_clock_getres - .long sys_clock_nanosleep + .long sys_set_tid_address + .long sys_timer_create + .long sys_timer_settime /* 260 */ + .long sys_timer_gettime + .long sys_timer_getoverrun + .long sys_timer_delete + .long sys_clock_settime + .long sys_clock_gettime /* 265 */ + .long sys_clock_getres + .long sys_clock_nanosleep .long sys_statfs64 - .long sys_fstatfs64 - .long sys_tgkill /* 270 */ + .long sys_fstatfs64 + .long sys_tgkill /* 270 */ .long sys_utimes - .long sys_fadvise64_64 + .long sys_fadvise64_64 .long sys_ni_syscall /* sys_vserver */ .long sys_ni_syscall /* sys_mbind */ .long sys_ni_syscall /* 275 sys_get_mempolicy */ @@ -1129,12 +886,75 @@ sys_call_table: .long sys_mq_timedreceive /* 280 */ .long sys_mq_notify .long sys_mq_getsetattr - .long sys_ni_syscall /* reserved for kexec */ + .long sys_ni_syscall .long sys_waitid .long sys_ni_syscall /* 285 */ /* available */ .long sys_add_key .long sys_request_key .long sys_keyctl + .long sys_ioprio_set + .long sys_ioprio_get /* 290 */ + .long sys_inotify_init + .long sys_inotify_add_watch + .long sys_inotify_rm_watch + .long sys_migrate_pages + .long sys_openat /* 295 */ + .long sys_mkdirat + .long sys_mknodat + .long sys_fchownat + .long sys_futimesat + .long sys_fstatat64 /* 300 */ + .long sys_unlinkat + .long sys_renameat + .long sys_linkat + .long sys_symlinkat + .long sys_readlinkat /* 305 */ + .long sys_fchmodat + .long sys_faccessat + .long sys_pselect6 + .long sys_ppoll + .long sys_unshare /* 310 */ + .long sys_set_robust_list + .long sys_get_robust_list + .long sys_splice + .long sys_sync_file_range + .long sys_tee /* 315 */ + .long sys_vmsplice + .long sys_move_pages + .long sys_getcpu + .long sys_epoll_pwait + .long sys_utimensat /* 320 */ + .long sys_signalfd + .long sys_timerfd_create + .long sys_eventfd + .long sys_fallocate + .long sys_timerfd_settime /* 325 */ + .long sys_timerfd_gettime + .long sys_signalfd4 + .long sys_eventfd2 + .long sys_epoll_create1 + .long sys_dup3 /* 330 */ + .long sys_pipe2 + .long sys_inotify_init1 + .long sys_preadv + .long sys_pwritev + .long sys_setns /* 335 */ + .long sys_name_to_handle_at + .long sys_open_by_handle_at + .long sys_rt_tgsigqueueinfo + .long sys_perf_event_open + .long sys_recvmmsg /* 340 */ + .long sys_accept4 + .long sys_fanotify_init + .long sys_fanotify_mark + .long sys_prlimit64 + .long sys_clock_adjtime /* 345 */ + .long sys_syncfs + .long sys_sendmmsg + .long sys_process_vm_readv + .long sys_process_vm_writev + .long sys_kcmp /* 350 */ + .long sys_finit_module /* * NOTE!! This doesn't have to be exact - we just have @@ -1146,4 +966,4 @@ sys_call_table: .rept NR_syscalls-(.-sys_call_table)/4 .long sys_ni_syscall .endr - + |