1281494Sandrew/*- 2281494Sandrew * Copyright (c) 2015 The FreeBSD Foundation 3281494Sandrew * All rights reserved. 4281494Sandrew * 5281494Sandrew * This software was developed by Andrew Turner under 6281494Sandrew * sponsorship from the FreeBSD Foundation. 7281494Sandrew * 8281494Sandrew * Redistribution and use in source and binary forms, with or without 9281494Sandrew * modification, are permitted provided that the following conditions 10281494Sandrew * are met: 11281494Sandrew * 1. Redistributions of source code must retain the above copyright 12281494Sandrew * notice, this list of conditions and the following disclaimer. 13281494Sandrew * 2. Redistributions in binary form must reproduce the above copyright 14281494Sandrew * notice, this list of conditions and the following disclaimer in the 15281494Sandrew * documentation and/or other materials provided with the distribution. 16281494Sandrew * 17281494Sandrew * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18281494Sandrew * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19281494Sandrew * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20281494Sandrew * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21281494Sandrew * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22281494Sandrew * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23281494Sandrew * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24281494Sandrew * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25281494Sandrew * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26281494Sandrew * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27281494Sandrew * SUCH DAMAGE. 28281494Sandrew * 29281494Sandrew */ 30281494Sandrew 31281494Sandrew#include <sys/cdefs.h> 32281494Sandrew__FBSDID("$FreeBSD: releng/11.0/sys/arm64/arm64/stack_machdep.c 287645 2015-09-11 03:54:37Z markj $"); 33281494Sandrew 34281494Sandrew#include <sys/param.h> 35281494Sandrew#include <sys/systm.h> 36281494Sandrew#include <sys/proc.h> 37281494Sandrew#include <sys/stack.h> 38281494Sandrew 39281494Sandrew#include <machine/vmparam.h> 40281494Sandrew#include <machine/pcb.h> 41281494Sandrew#include <machine/stack.h> 42281494Sandrew 43286133Sandrewstatic void 44286133Sandrewstack_capture(struct stack *st, struct unwind_state *frame) 45286133Sandrew{ 46286133Sandrew 47286133Sandrew stack_zero(st); 48286133Sandrew while (1) { 49286133Sandrew unwind_frame(frame); 50286133Sandrew if (!INKERNEL((vm_offset_t)frame->fp) || 51286133Sandrew !INKERNEL((vm_offset_t)frame->pc)) 52286133Sandrew break; 53286133Sandrew if (stack_put(st, frame->pc) == -1) 54286133Sandrew break; 55286133Sandrew } 56286133Sandrew} 57286133Sandrew 58281494Sandrewvoid 59281494Sandrewstack_save_td(struct stack *st, struct thread *td) 60281494Sandrew{ 61286133Sandrew struct unwind_state frame; 62281850Sandrew 63281850Sandrew if (TD_IS_SWAPPED(td)) 64281850Sandrew panic("stack_save_td: swapped"); 65281850Sandrew if (TD_IS_RUNNING(td)) 66281850Sandrew panic("stack_save_td: running"); 67281850Sandrew 68286133Sandrew frame.sp = td->td_pcb->pcb_sp; 69286133Sandrew frame.fp = td->td_pcb->pcb_x[29]; 70286133Sandrew frame.pc = td->td_pcb->pcb_x[30]; 71286133Sandrew 72286133Sandrew stack_capture(st, &frame); 73281494Sandrew} 74281494Sandrew 75287645Smarkjint 76287645Smarkjstack_save_td_running(struct stack *st, struct thread *td) 77287645Smarkj{ 78287645Smarkj 79287645Smarkj return (EOPNOTSUPP); 80287645Smarkj} 81287645Smarkj 82281494Sandrewvoid 83281494Sandrewstack_save(struct stack *st) 84281494Sandrew{ 85286133Sandrew struct unwind_state frame; 86286133Sandrew uint64_t sp; 87281850Sandrew 88286133Sandrew __asm __volatile("mov %0, sp" : "=&r" (sp)); 89286133Sandrew 90286133Sandrew frame.sp = sp; 91286133Sandrew frame.fp = (uint64_t)__builtin_frame_address(0); 92286133Sandrew frame.pc = (uint64_t)stack_save; 93286133Sandrew 94286133Sandrew stack_capture(st, &frame); 95281494Sandrew} 96