stack_machdep.c

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    1 /*-
    2  * Copyright (c) 2005 Antoine Brodin
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.0/sys/arm/arm/stack_machdep.c 174195 2007-12-02 20:40:35Z rwatson $");
   29 
   30 #include <sys/systm.h>
   31 #include <sys/param.h>
   32 #include <sys/proc.h>
   33 #include <sys/stack.h>
   34 
   35 #include <machine/vmparam.h>
   36 #include <machine/pcb.h>
   37 #include <machine/stack.h>
   38 
   39 static void
   40 stack_capture(struct stack *st, u_int32_t *frame)
   41 {
   42         vm_offset_t callpc;
   43 
   44         stack_zero(st);
   45         while (1) {
   46                 if (!INKERNEL(frame))
   47                         break;
   48                 callpc = frame[FR_SCP];
   49                 if (stack_put(st, callpc) == -1)
   50                         break;
   51                 frame = (u_int32_t *)(frame[FR_RFP]);
   52         }
   53 }
   54 
   55 void
   56 stack_save_td(struct stack *st, struct thread *td)
   57 {
   58         u_int32_t *frame;
   59 
   60         if (TD_IS_SWAPPED(td))
   61                 panic("stack_save_td: swapped");
   62         if (TD_IS_RUNNING(td))
   63                 panic("stack_save_td: running");
   64 
   65         frame = (u_int32_t *)td->td_pcb->un_32.pcb32_r11;
   66         stack_capture(st, frame);
   67 }
   68 
   69 void
   70 stack_save(struct stack *st)
   71 {
   72         u_int32_t *frame;
   73 
   74         frame = (u_int32_t *)__builtin_frame_address(0);
   75         stack_capture(st, frame);
   76 }

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FreeBSD/Linux Kernel Cross Reference sys/arm/arm/stack_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/arm/stack_machdep.c