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("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/proc.h> 33#include <sys/stack.h> 34 35#include <machine/pcb.h> 36#include <machine/stack.h> 37 38#include <vm/vm.h> 39#include <vm/vm_param.h> 40#include <vm/pmap.h> 41 42static void 43stack_capture(struct stack *st, register_t ebp) 44{ 45 struct i386_frame *frame; 46 vm_offset_t callpc; 47 48 stack_zero(st); 49 frame = (struct i386_frame *)ebp; 50 while (1) { 51 if (!INKERNEL(frame)) 52 break; 53 callpc = frame->f_retaddr; 54 if (!INKERNEL(callpc)) 55 break; 56 if (stack_put(st, callpc) == -1) 57 break; 58 if (frame->f_frame <= frame || 59 (vm_offset_t)frame->f_frame >= 60 (vm_offset_t)ebp + KSTACK_PAGES * PAGE_SIZE) 61 break; 62 frame = frame->f_frame; 63 } 64} 65 66void 67stack_save_td(struct stack *st, struct thread *td) 68{ 69 register_t ebp; 70 71 if (TD_IS_SWAPPED(td)) 72 panic("stack_save_td: swapped"); 73 if (TD_IS_RUNNING(td)) 74 panic("stack_save_td: running"); 75 76 ebp = td->td_pcb->pcb_ebp; 77 stack_capture(st, ebp); 78} 79 80void 81stack_save(struct stack *st) 82{ 83 register_t ebp; 84 85 __asm __volatile("movl %%ebp,%0" : "=r" (ebp)); 86 stack_capture(st, ebp); 87} 88