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/* $Id: entry.S,v 1.1.1.1 2004-04-15 01:22:39 phoenix Exp $** linux/arch/cris/entry.S** Copyright (C) 2000, 2001, 2002 Axis Communications AB** Authors: Bjorn Wesen (bjornw@axis.com)** $Log: not supported by cvs2svn $* Revision 1.42 2003/07/07 09:00:50 johana* Added CONFIG_ETRAX_DEBUG_INTERRUPT support.** Revision 1.41 2003/06/17 13:57:50 starvik* Merge of Linux 2.4.21** Revision 1.40 2002/12/02 08:11:41 starvik* Merge of Linux 2.4.20** Revision 1.39 2002/04/24 00:46:45 bjornw* Added sys_tkill** Revision 1.38 2002/01/16 15:15:30 bjornw* Use a C-code compatible watchdog reset when NICE_DOGGY is enabled** 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***//** entry.S contains the system-call and fault low-level handling routines.** NOTE: This code handles signal-recognition, which happens every time* 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* updated in fork.c:copy_process, signal.c:do_signal,* ptrace.c and ptrace.h**/#include <linux/config.h>#include <linux/linkage.h>#include <linux/sys.h>#include <asm/unistd.h>#include <asm/sv_addr_ag.h>#include <asm/errno.h>;; functions exported from this file.globl system_call.globl ret_from_intr.globl ret_from_sys_call.globl resume.globl multiple_interrupt.globl hwbreakpoint.globl IRQ1_interrupt.globl timer_interrupt.globl timer_shortcut.globl spurious_interrupt.globl hw_bp_trigs.globl mmu_bus_fault.globl do_sigtrap.globl gdb_handle_breakpoint.globl sys_call_table;; Get values and offsets into various structs. The file isn't;; suitable for consumption by the preprocessor, so don't use;; #include..include "entryoffsets.s";; process bits for ptrace. FIXME: Should be in a header file.PT_TRACESYS_BIT = 1;; below are various parts of system_call which are not in the fast-path;; handle software irqs_handle_softirq:move.d $r9, $r1jsr do_softirq ; call the C routine for softirq handlingmove.d $r1, $r9;; fall-throughret_from_intr:;; check for resched only 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 + LDCCR], $r0; regs->dccrbtstq 8, $r0 ; U-flagbpl _Rexit ; go back directlynopba _ret_with_reschedule ; go back but check schedule and signals firstnop_reschedule:;; keep r9 intactmove.d $r9, $r1jsr scheduleba ret_from_sys_callmove.d $r1, $r9;; return but call do_signal first_signal_return:ei ; we can get here from an interruptmove.d $r9, $r10 ; do_signals syscall/irq parammoveq 0, $r11 ; oldset param - 0 in this casemove.d $sp, $r12 ; another argument to do_signal (the regs param)jsr do_signal ; arch/cris/kernel/signal.cba _Rexitnop;; 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;; and one for interrupts) we push the contents of BRP instead of IRP in the;; system call prologue, to make it look like an ordinary interrupt on the;; stackframe.;;;; 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;; really designed so that the fast-path does not force cache-loading of non-used;; instructions. Only the non-common cases cause the outlined code to run..system_call:;; stack-frame similar to the irq heads, which is reversed in ret_from_sys_callmove $brp,[$sp=$sp-16]; instruction pointer and room for a fake SBFS framepush $srppush $dccrpush $mofsubq 14*4, $sp ; make room for r0-r13movem $r13, [$sp] ; push r0-r13push $r10 ; push orig_r10clear.d [$sp=$sp-4] ; frametype == 0, normal stackframemovs.w -ENOSYS, $r0move.d $r0, [$sp+LR10] ; put the default return value in r10 in the frame;; check if this process is syscall-tracedmovs.w -8192, $r0 ; THREAD_SIZE == 8192and.d $sp, $r0move.d [$r0+LTASK_PTRACE], $r0btstq PT_TRACESYS_BIT, $r0bmi _tracesysnop;; check for sanity in the requested syscall numbercmpu.w NR_syscalls, $r9bcc ret_from_sys_calllslq 2, $r9 ; multiply by 4, in the delay slot;; as a bonus 7th parameter, we give the location on the stack;; 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;; respectively, and we need to put them on the stack.push $srppush $mofjsr [$r9+sys_call_table] ; actually do the system calladdq 3*4, $sp ; pop the mof, srp and regs parametersmove.d $r10, [$sp+LR10] ; save the return valuemoveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys call;; fall through into ret_from_sys_call to returnret_from_sys_call:;; r9 is a parameter - if 1, we came from a syscall, if 0, from an irq;; check if any bottom halves need servicetest.d [irq_stat] ; softirq_pendingbne _handle_softirqnop_ret_with_reschedule:;; first get the current task-struct pointer (see top for defs)move.d $sp, $r0and.d -8192, $r0 ; THREAD_SIZE == 8192;; see if we want to reschedule into another processtest.d [$r0+LTASK_NEEDRESCHED]bne _reschedulenop;; see if we need to run signal checks (important that r9 is intact here)test.d [$r0+LTASK_SIGPENDING]bne _signal_returnnop_Rexit:;; this epilogue MUST match the prologues in multiple_interrupt, irq.h and ptregs.h#ifdef CONFIG_ETRAX_DEBUG_INTERRUPTmove.d $pc,$r10move $ccr,$r11move.d [$sp + LDCCR], $r12; regs->dccrjsr log_int#endifpop $r10 ; frametypebne _RBFexit ; was not CRIS_FRAME_NORMAL, handle otherwiseaddq 4, $sp ; skip orig_r10, in delayslotmovem [$sp+], $r13 ; registers r0-r13pop $mof ; multiply overflow registerpop $dccr ; condition codespop $srp ; subroutine return pointer;; now we have a 4-word SBFS frame which we do not want to restore;; using RBF since it was not stacked with SBFS. instead we would like to;; just get the PC value to restart it with, and skip the rest of;; the frame.;; Also notice that it's important to use instructions here that;; keep the interrupts disabled (since we've already popped DCCR)move [$sp=$sp+16], $p8; pop the SBFS frame from the spjmpu [$sp-16] ; return through the irp field in the sbfs frame_RBFexit:movem [$sp+], $r13 ; registers r0-r13, in delay slotpop $mof ; multiply overflow registerpop $dccr ; condition codespop $srp ; subroutine return pointerrbf [$sp+] ; return by popping the CPU status_tracesys:;; this first invocation of syscall_trace _requires_ that;; LR10 in the frame contains -ENOSYS (as is set in the beginning;; of system_call).jsr syscall_trace;; now we should more or less do the same things as in the system_call;; but since our argument regs got clobbered during syscall_trace and;; because syscall_trace might want to alter them, we need to reload them;; from the stack-frame as we use them.;; check for sanity in the requested syscall numbermove.d [$sp+LR9], $r9movs.w -ENOSYS, $r10cmpu.w NR_syscalls, $r9bcc 1flslq 2, $r9 ; multiply by 4, in the delay slot;; read the system call vector entry into r9move.d [$r9+sys_call_table], $r9;; restore r10, r11, r12, r13, mof and srp into the needed registersmove.d [$sp+LORIG_R10], $r10 ; LR10 is already filled with -ENOSYS.move.d [$sp+LR11], $r11move.d [$sp+LR12], $r12move.d [$sp+LR13], $r13move [$sp+LMOF], $mofmove [$sp+LSRP], $srp;; as a bonus 7th parameter, we give the location on the stack;; of the register structure itself. some syscalls need this.push $sp;; the fifth and sixth parameters needs to be put on the stack for;; the system call to find thempush $srppush $mofjsr $r9 ; actually call the system-calladdq 3*4, $sp ; pop the srp, mof and regs parameters1: move.d $r10, [$sp+LR10]; save the return value;; second call of syscall_trace, to let it grab the resultsjsr syscall_tracemoveq 1, $r9 ; "parameter" to ret_from_sys_call to show it was a sys callba ret_from_sys_callnop;; 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;;;; 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 stackadd.d $r12, $r10 ; r10 = current tasks tssmove $dccr, [$r10+LTHREAD_DCCR] ; save irq enable state#ifdef CONFIG_ETRAX_DEBUG_INTERRUPTpush $r9push $r10push $r11push $r12push $r13move.d $pc,$r10move $ccr,$r11clear.d $r12jsr log_intpop $r13pop $r12pop $r11pop $r10pop $r9#endifdimove $usp, [$r10+LTHREAD_USP] ; save user-mode stackpointer;; See copy_thread for the reason why register R9 is saved.subq 10*4, $spmovem $r9, [$sp] ; save non-scratch registers and R9.move.d $sp, [$r10+LTHREAD_KSP] ; save the kernel stack pointer for the old taskmove.d $sp, $r10 ; return last running task in r10and.d -8192, $r10 ; get task ptr from stackpointeradd.d $r12, $r11 ; find the new tasks tssmove.d [$r11+LTHREAD_KSP], $sp ; switch into the new stackframe by restoring kernel spmovem [$sp+], $r9 ; restore non-scratch registers and R9.move [$r11+LTHREAD_USP], $usp ; restore user-mode stackpointermove [$r11+LTHREAD_DCCR], $dccr ; restore irq enable statusjump [$sp+] ; restore PC;; This is the MMU bus fault handler.;; It needs to stack the CPU status and overall is different;; from the other interrupt handlers.mmu_bus_fault:sbfs [$sp=$sp-16] ; push the internal CPU status;; the first longword in the sbfs frame was the interrupted PC;; which fits nicely with the "IRP" slot in pt_regs normally used to;; contain the return address. used by Oops to print kernel errors..push $srp ; make a stackframe similar to pt_regspush $dccrpush $mofdisubq 14*4, $spmovem $r13, [$sp]push $r10 ; dummy orig_r10moveq 1, $r10push $r10 ; frametype == 1, BUSFAULT frame typemove.d $sp, $r10 ; pt_regs argument to handle_mmu_bus_faultjsr handle_mmu_bus_fault ; in arch/cris/mm/fault.c;; now we need to return through the normal path, we cannot just;; do the RBFexit since we might have killed off the running;; process due to a SEGV, scheduled due to a page blocking or;; whatever.moveq 0, $r9 ; busfault is equivalent to an irqba ret_from_intrnop;; special handlers for breakpoint and NMI#if 0hwbreakpoint:push $dccrdipush $r10push $r11push $r12push $r13clearf bmove $brp,$r11move.d [hw_bp_msg],$r10jsr printksetf bpop $r13pop $r12pop $r11pop $r10pop $dccrretbnop#elsehwbreakpoint:push $dccrdi#if 1push $r10push $r11move.d [hw_bp_trig_ptr],$r10move.d [$r10],$r11cmp.d 42,$r11beq 1fnopmove $brp,$r11move.d $r11,[$r10+]move.d $r10,[hw_bp_trig_ptr]1: pop $r11pop $r10#endifpop $dccrretbnop#endifIRQ1_interrupt:#if defined(CONFIG_ETRAX_WATCHDOG) && !defined(CONFIG_SVINTO_SIM);; If we receive a watchdog interrupt while it is not expected, then set;; up a canonical frame and dump register contents before dying.;; 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 framepush $srppush $dccrpush $mofdisubq 14*4, $spmovem $r13, [$sp]push $r10 ; push orig_r10clear.d [$sp=$sp-4] ; frametype == 0, normal frame;; We don't check that we actually were bit by the watchdog as opposed to;; an external NMI, since there is currently no handler for external NMI.;; 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..comm cause_of_death, 4 ;; Don't declare this anywhere.move.d [cause_of_death], $r10cmp.d 0xbedead, $r10_killed_by_death:beq _killed_by_deathnop;; We'll see this in ksymoops dumps.Watchdog_bite:#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY;; We just restart the watchdog here to be sure we dont get;; hit while printing the watchdogmsg below;; This restart is compatible with the rest of the C-code, so;; the C-code can keep restarting the watchdog after this point.;; The non-NICE_DOGGY code below though, disables the possibility;; to restart since it changes the watchdog key, to avoid any;; buggy loops etc. keeping the watchdog alive after this.jsr reset_watchdog#else;; We need to extend the 3.3ms after the NMI at watchdog bite, so we have;; time for an oops-dump over a 115k2 serial wire. Another 100ms should do.;; Change the watchdog key to an arbitrary 3-bit value and restart the;; watchdog.#define WD_INIT 2moveq IO_FIELD (R_WATCHDOG, key, WD_INIT), $r10move.d R_WATCHDOG, $r11move.d $r10, [$r11]moveq IO_FIELD (R_WATCHDOG, key, \IO_EXTRACT (R_WATCHDOG, key, \IO_MASK (R_WATCHDOG, key)) \^ WD_INIT) \| IO_STATE (R_WATCHDOG, enable, start), $r10move.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;; to reset us.move.d _watchdogmsg,$r10jsr printkmove.d $sp, $r10jsr watchdog_bite_hook;; This nop is here so we see the "Watchdog_bite" label in ksymoops dumps;; rather than "spurious_interrupt".nop;; At this point we drop down into spurious_interrupt, which will do a;; hard reset..section .rodata,"a"_watchdogmsg:.ascii "Oops: bitten by watchdog\n\0".previous#endif /* CONFIG_ETRAX_WATCHDOG and not CONFIG_SVINTO_SIM */spurious_interrupt:dijump 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 finishesmultiple_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 framepush $srppush $dccrpush $mofdisubq 14*4, $spmovem $r13, [$sp]push $r10 ; push orig_r10clear.d [$sp=$sp-4] ; frametype == 0, normal framemove.d irq_shortcuts + 8, $r1moveq 2, $r2 ; first bit we care about is the timer0 irqmove.d [R_VECT_MASK_RD], $r0; read the irq bits that triggered the multiple irq1:btst $r2, $r0 ; check for the irq given by bit r2bmi _do_shortcut ; actually do the shortcutnopaddq 1, $r2 ; next vector bitaddq 4, $r1 ; next vectorcmp.b 32, $r2bne 1b ; process all irq's up to and including number 31nop;; strange, we didn't get any set vector bits.. oh well, just returnba _Rexitnop_do_shortcut:test.d [$r1]beq _Rexitnopjump [$r1] ; jump to the irq handlers shortcutdo_sigtrap:;;;; SIGTRAP the process that executed the break instruction.;; Make a frame that Rexit in entry.S expects.;;move $brp, [$sp=$sp-16] ; Push BRP while faking a cpu status record.push $srp ; Push subroutine return pointer.push $dccr ; Push condition codes.push $mof ; Push multiply overflow reg.di ; Need to disable irq's at this point.subq 14*4, $sp ; Make room for r0-r13.movem $r13, [$sp] ; Push the r0-r13 registers.push $r10 ; Push orig_r10.clear.d [$sp=$sp-4] ; Frametype - this is a normal stackframe.movs.w -8192,$r9 ; THREAD_SIZE == 8192and.d $sp, $r9move.d [$r9+LTASK_PID], $r10 ; current->pid as arg1.moveq 5, $r11 ; SIGTRAP as arg2.jsr sys_killjump ret_from_intr ; Use the return routine for interrupts.gdb_handle_breakpoint:push $dccrpush $r0#ifdef CONFIG_ETRAX_KGDBmove $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).pop $r0 ; Restore r0.ba kgdb_handle_breakpoint ; Go to kernel debugging.pop $dccr ; Restore dccr in delay slot.#endif_ugdb_handle_breakpoint:move $brp, $r0 ; Use r0 temporarily for calculation.subq 2, $r0 ; Set to address of previous instruction.move $r0, $brppop $r0 ; Restore r0.ba do_sigtrap ; SIGTRAP the offending process.pop $dccr ; Restore dccr in delay slot..datahw_bp_trigs:.space 64*4hw_bp_trig_ptr:.dword hw_bp_trigs/** This is the mechanism for creating a new kernel thread.** NOTE! Only a kernel-only process (i.e. the swapper or direct descendants* who haven't done an "execve()") should use this: it will work within* a system call from a "real" process, but the process memory space will* not be free'd until both the parent and the child have exited.** This *can* be done in C with an single-asm-wrapped-in-a-function, but you* get more or less gross code. The safer you make the asm-constraints,* the grosser the code, at least with the gcc version in cris-dist-1.13.*//* int arch_kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) *//* r10 r11 r12 */.text.global arch_kernel_threadarch_kernel_thread:/* Save ARG for later. */move.d $r11, $r13/* r11 is argument 2 to clone, the flags */move.d $r12, $r11or.w LCLONE_VM, $r11/* Save FN for later. */move.d $r10, $r12/* r9 contains syscall number, to sys_clone */movu.w __NR_clone, $r9/* r10 is argument 1 to clone */clear.d $r10/* call sys_clone, this will fork */break 13/* parent or child? child returns 0 here. */test.d $r10/* jump if parent */bne 1fnop /* delay slot *//* set argument to function to call */move.d $r13, $r10/* call specified function */jsr $r12/* If we ever return from the function, something bad has happened. *//* r9 is sys_exit syscall number */movu.w __NR_exit, $r9/* Give a really bad exit-value */moveq -1, $r10/* call sys_exit, killing the child */break 131:retnop /* delay slot */.section .rodata,"a"sys_call_table:.long SYMBOL_NAME(sys_ni_syscall) /* 0 - old "setup()" system call*/.long SYMBOL_NAME(sys_exit).long SYMBOL_NAME(sys_fork).long SYMBOL_NAME(sys_read).long SYMBOL_NAME(sys_write).long SYMBOL_NAME(sys_open) /* 5 */.long SYMBOL_NAME(sys_close).long SYMBOL_NAME(sys_waitpid).long SYMBOL_NAME(sys_creat).long SYMBOL_NAME(sys_link).long SYMBOL_NAME(sys_unlink) /* 10 */.long SYMBOL_NAME(sys_execve).long SYMBOL_NAME(sys_chdir).long SYMBOL_NAME(sys_time).long SYMBOL_NAME(sys_mknod).long SYMBOL_NAME(sys_chmod) /* 15 */.long SYMBOL_NAME(sys_lchown16).long SYMBOL_NAME(sys_ni_syscall) /* old break syscall holder */.long SYMBOL_NAME(sys_stat).long SYMBOL_NAME(sys_lseek).long SYMBOL_NAME(sys_getpid) /* 20 */.long SYMBOL_NAME(sys_mount).long SYMBOL_NAME(sys_oldumount).long SYMBOL_NAME(sys_setuid16).long SYMBOL_NAME(sys_getuid16).long SYMBOL_NAME(sys_stime) /* 25 */.long SYMBOL_NAME(sys_ptrace).long SYMBOL_NAME(sys_alarm).long SYMBOL_NAME(sys_fstat).long SYMBOL_NAME(sys_pause).long SYMBOL_NAME(sys_utime) /* 30 */.long SYMBOL_NAME(sys_ni_syscall) /* old stty syscall holder */.long SYMBOL_NAME(sys_ni_syscall) /* old gtty syscall holder */.long SYMBOL_NAME(sys_access).long SYMBOL_NAME(sys_nice).long SYMBOL_NAME(sys_ni_syscall) /* 35 old ftime syscall holder */.long SYMBOL_NAME(sys_sync).long SYMBOL_NAME(sys_kill).long SYMBOL_NAME(sys_rename).long SYMBOL_NAME(sys_mkdir).long SYMBOL_NAME(sys_rmdir) /* 40 */.long SYMBOL_NAME(sys_dup).long SYMBOL_NAME(sys_pipe).long SYMBOL_NAME(sys_times).long SYMBOL_NAME(sys_ni_syscall) /* old prof syscall holder */.long SYMBOL_NAME(sys_brk) /* 45 */.long SYMBOL_NAME(sys_setgid16).long SYMBOL_NAME(sys_getgid16).long SYMBOL_NAME(sys_signal).long SYMBOL_NAME(sys_geteuid16).long SYMBOL_NAME(sys_getegid16) /* 50 */.long SYMBOL_NAME(sys_acct).long SYMBOL_NAME(sys_umount) /* recycled never used phys() */.long SYMBOL_NAME(sys_ni_syscall) /* old lock syscall holder */.long SYMBOL_NAME(sys_ioctl).long SYMBOL_NAME(sys_fcntl) /* 55 */.long SYMBOL_NAME(sys_ni_syscall) /* old mpx syscall holder */.long SYMBOL_NAME(sys_setpgid).long SYMBOL_NAME(sys_ni_syscall) /* old ulimit syscall holder */.long SYMBOL_NAME(sys_ni_syscall) /* old sys_olduname holder */.long SYMBOL_NAME(sys_umask) /* 60 */.long SYMBOL_NAME(sys_chroot).long SYMBOL_NAME(sys_ustat).long SYMBOL_NAME(sys_dup2).long SYMBOL_NAME(sys_getppid).long SYMBOL_NAME(sys_getpgrp) /* 65 */.long SYMBOL_NAME(sys_setsid).long SYMBOL_NAME(sys_sigaction).long SYMBOL_NAME(sys_sgetmask).long SYMBOL_NAME(sys_ssetmask).long SYMBOL_NAME(sys_setreuid16) /* 70 */.long SYMBOL_NAME(sys_setregid16).long SYMBOL_NAME(sys_sigsuspend).long SYMBOL_NAME(sys_sigpending).long SYMBOL_NAME(sys_sethostname).long SYMBOL_NAME(sys_setrlimit) /* 75 */.long SYMBOL_NAME(sys_old_getrlimit).long SYMBOL_NAME(sys_getrusage).long SYMBOL_NAME(sys_gettimeofday).long SYMBOL_NAME(sys_settimeofday).long SYMBOL_NAME(sys_getgroups16) /* 80 */.long SYMBOL_NAME(sys_setgroups16).long SYMBOL_NAME(sys_select) /* was old_select in Linux/E100 */.long SYMBOL_NAME(sys_symlink).long SYMBOL_NAME(sys_lstat).long SYMBOL_NAME(sys_readlink) /* 85 */.long SYMBOL_NAME(sys_uselib).long SYMBOL_NAME(sys_swapon).long SYMBOL_NAME(sys_reboot).long SYMBOL_NAME(old_readdir).long SYMBOL_NAME(old_mmap) /* 90 */.long SYMBOL_NAME(sys_munmap).long SYMBOL_NAME(sys_truncate).long SYMBOL_NAME(sys_ftruncate).long SYMBOL_NAME(sys_fchmod).long SYMBOL_NAME(sys_fchown16) /* 95 */.long SYMBOL_NAME(sys_getpriority).long SYMBOL_NAME(sys_setpriority).long SYMBOL_NAME(sys_ni_syscall) /* old profil syscall holder */.long SYMBOL_NAME(sys_statfs).long SYMBOL_NAME(sys_fstatfs) /* 100 */.long SYMBOL_NAME(sys_ni_syscall) /* sys_ioperm in i386 */.long SYMBOL_NAME(sys_socketcall).long SYMBOL_NAME(sys_syslog).long SYMBOL_NAME(sys_setitimer).long SYMBOL_NAME(sys_getitimer) /* 105 */.long SYMBOL_NAME(sys_newstat).long SYMBOL_NAME(sys_newlstat).long SYMBOL_NAME(sys_newfstat).long SYMBOL_NAME(sys_ni_syscall) /* old sys_uname holder */.long SYMBOL_NAME(sys_ni_syscall) /* sys_iopl in i386 */.long SYMBOL_NAME(sys_vhangup).long SYMBOL_NAME(sys_ni_syscall) /* old "idle" system call */.long SYMBOL_NAME(sys_ni_syscall) /* vm86old in i386 */.long SYMBOL_NAME(sys_wait4).long SYMBOL_NAME(sys_swapoff) /* 115 */.long SYMBOL_NAME(sys_sysinfo).long SYMBOL_NAME(sys_ipc).long SYMBOL_NAME(sys_fsync).long SYMBOL_NAME(sys_sigreturn).long SYMBOL_NAME(sys_clone) /* 120 */.long SYMBOL_NAME(sys_setdomainname).long SYMBOL_NAME(sys_newuname).long SYMBOL_NAME(sys_ni_syscall) /* TODO sys_modify_ldt - do something ?*/.long SYMBOL_NAME(sys_adjtimex).long SYMBOL_NAME(sys_mprotect) /* 125 */.long SYMBOL_NAME(sys_sigprocmask).long SYMBOL_NAME(sys_create_module).long SYMBOL_NAME(sys_init_module).long SYMBOL_NAME(sys_delete_module).long SYMBOL_NAME(sys_get_kernel_syms) /* 130 */.long SYMBOL_NAME(sys_quotactl).long SYMBOL_NAME(sys_getpgid).long SYMBOL_NAME(sys_fchdir).long SYMBOL_NAME(sys_bdflush).long SYMBOL_NAME(sys_sysfs) /* 135 */.long SYMBOL_NAME(sys_personality).long SYMBOL_NAME(sys_ni_syscall) /* for afs_syscall */.long SYMBOL_NAME(sys_setfsuid16).long SYMBOL_NAME(sys_setfsgid16).long SYMBOL_NAME(sys_llseek) /* 140 */.long SYMBOL_NAME(sys_getdents).long SYMBOL_NAME(sys_select).long SYMBOL_NAME(sys_flock).long SYMBOL_NAME(sys_msync).long SYMBOL_NAME(sys_readv) /* 145 */.long SYMBOL_NAME(sys_writev).long SYMBOL_NAME(sys_getsid).long SYMBOL_NAME(sys_fdatasync).long SYMBOL_NAME(sys_sysctl).long SYMBOL_NAME(sys_mlock) /* 150 */.long SYMBOL_NAME(sys_munlock).long SYMBOL_NAME(sys_mlockall).long SYMBOL_NAME(sys_munlockall).long SYMBOL_NAME(sys_sched_setparam).long SYMBOL_NAME(sys_sched_getparam) /* 155 */.long SYMBOL_NAME(sys_sched_setscheduler).long SYMBOL_NAME(sys_sched_getscheduler).long SYMBOL_NAME(sys_sched_yield).long SYMBOL_NAME(sys_sched_get_priority_max).long SYMBOL_NAME(sys_sched_get_priority_min) /* 160 */.long SYMBOL_NAME(sys_sched_rr_get_interval).long SYMBOL_NAME(sys_nanosleep).long SYMBOL_NAME(sys_mremap).long SYMBOL_NAME(sys_setresuid16).long SYMBOL_NAME(sys_getresuid16) /* 165 */.long SYMBOL_NAME(sys_ni_syscall) /* sys_vm86 */.long SYMBOL_NAME(sys_query_module).long SYMBOL_NAME(sys_poll).long SYMBOL_NAME(sys_nfsservctl).long SYMBOL_NAME(sys_setresgid16) /* 170 */.long SYMBOL_NAME(sys_getresgid16).long SYMBOL_NAME(sys_prctl).long SYMBOL_NAME(sys_rt_sigreturn).long SYMBOL_NAME(sys_rt_sigaction).long SYMBOL_NAME(sys_rt_sigprocmask) /* 175 */.long SYMBOL_NAME(sys_rt_sigpending).long SYMBOL_NAME(sys_rt_sigtimedwait).long SYMBOL_NAME(sys_rt_sigqueueinfo).long SYMBOL_NAME(sys_rt_sigsuspend).long SYMBOL_NAME(sys_pread) /* 180 */.long SYMBOL_NAME(sys_pwrite).long SYMBOL_NAME(sys_chown16).long SYMBOL_NAME(sys_getcwd).long SYMBOL_NAME(sys_capget).long SYMBOL_NAME(sys_capset) /* 185 */.long SYMBOL_NAME(sys_sigaltstack).long SYMBOL_NAME(sys_sendfile).long SYMBOL_NAME(sys_ni_syscall) /* streams1 */.long SYMBOL_NAME(sys_ni_syscall) /* streams2 */.long SYMBOL_NAME(sys_vfork) /* 190 */.long SYMBOL_NAME(sys_getrlimit).long SYMBOL_NAME(sys_mmap2).long SYMBOL_NAME(sys_truncate64).long SYMBOL_NAME(sys_ftruncate64).long SYMBOL_NAME(sys_stat64) /* 195 */.long SYMBOL_NAME(sys_lstat64).long SYMBOL_NAME(sys_fstat64).long SYMBOL_NAME(sys_lchown).long SYMBOL_NAME(sys_getuid).long SYMBOL_NAME(sys_getgid) /* 200 */.long SYMBOL_NAME(sys_geteuid).long SYMBOL_NAME(sys_getegid).long SYMBOL_NAME(sys_setreuid).long SYMBOL_NAME(sys_setregid).long SYMBOL_NAME(sys_getgroups) /* 205 */.long SYMBOL_NAME(sys_setgroups).long SYMBOL_NAME(sys_fchown).long SYMBOL_NAME(sys_setresuid).long SYMBOL_NAME(sys_getresuid).long SYMBOL_NAME(sys_setresgid) /* 210 */.long SYMBOL_NAME(sys_getresgid).long SYMBOL_NAME(sys_chown).long SYMBOL_NAME(sys_setuid).long SYMBOL_NAME(sys_setgid).long SYMBOL_NAME(sys_setfsuid) /* 215 */.long SYMBOL_NAME(sys_setfsgid).long SYMBOL_NAME(sys_pivot_root).long SYMBOL_NAME(sys_mincore).long SYMBOL_NAME(sys_madvise).long SYMBOL_NAME(sys_getdents64) /* 220 */.long SYMBOL_NAME(sys_fcntl64).long SYMBOL_NAME(sys_ni_syscall) /* reserved for TUX */.long SYMBOL_NAME(sys_ni_syscall) /* Reserved for Security */.long SYMBOL_NAME(sys_gettid).long SYMBOL_NAME(sys_readahead) /* 225 */.long SYMBOL_NAME(sys_setxattr).long SYMBOL_NAME(sys_lsetxattr).long SYMBOL_NAME(sys_fsetxattr).long SYMBOL_NAME(sys_getxattr).long SYMBOL_NAME(sys_lgetxattr) /* 230 */.long SYMBOL_NAME(sys_fgetxattr).long SYMBOL_NAME(sys_listxattr).long SYMBOL_NAME(sys_llistxattr).long SYMBOL_NAME(sys_flistxattr).long SYMBOL_NAME(sys_removexattr) /* 235 */.long SYMBOL_NAME(sys_lremovexattr).long SYMBOL_NAME(sys_fremovexattr).long SYMBOL_NAME(sys_tkill).long SYMBOL_NAME(sys_ni_syscall) /* reserved for sendfile64 */.long SYMBOL_NAME(sys_ni_syscall) /* 240 reserved for futex */.long SYMBOL_NAME(sys_ni_syscall) /* reserved for sched_setaffinity */.long SYMBOL_NAME(sys_ni_syscall) /* reserved for sched_getaffinity */.long SYMBOL_NAME(sys_ni_syscall) /* sys_set_thread_area */.long SYMBOL_NAME(sys_ni_syscall) /* sys_get_thread_area */.long SYMBOL_NAME(sys_ni_syscall) /* 245 sys_io_setup */.long SYMBOL_NAME(sys_ni_syscall) /* sys_io_destroy */.long SYMBOL_NAME(sys_ni_syscall) /* sys_io_getevents */.long SYMBOL_NAME(sys_ni_syscall) /* sys_io_submit */.long SYMBOL_NAME(sys_ni_syscall) /* sys_io_cancel */.long SYMBOL_NAME(sys_ni_syscall) /* 250 sys_alloc_hugepages */.long SYMBOL_NAME(sys_ni_syscall) /* sys_free_hugepages */.long SYMBOL_NAME(sys_ni_syscall) /* sys_exit_group *//** NOTE!! This doesn't have to be exact - we just have* to make sure we have _enough_ of the "sys_ni_syscall"* entries. Don't panic if you notice that this hasn't* been shrunk every time we add a new system call.*/.rept NR_syscalls-(.-sys_call_table)/4.long SYMBOL_NAME(sys_ni_syscall).endr
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