150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* $NetBSD: db_trace.c,v 1.1 2001/03/04 05:11:41 matt Exp $ */
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/*
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* Copyright (c) 1996 Scott K. Stevens
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*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_access.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_output.h>
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#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MIN_KERNEL_ADDRESS)
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void
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db_stack_trace_print(addr, have_addr, count, modif, pr)
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db_expr_t addr;
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int have_addr;
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db_expr_t count;
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char *modif;
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void (*pr) __P((const char *, ...));
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{
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struct frame *frame, *lastframe;
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char c, *cp = modif;
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boolean_t kernel_only = TRUE;
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boolean_t trace_thread = FALSE;
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while ((c = *cp++) != 0) {
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if (c == 'u')
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kernel_only = FALSE;
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if (c == 't')
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trace_thread = TRUE;
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}
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/*
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* The frame pointer points to the top word of the stack frame so we
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* need to adjust it by sizeof(struct frame) - sizeof(u_int))
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* to get the address of the start of the frame structure.
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*/
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if (!have_addr)
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frame = (struct frame *)(DDB_REGS->tf_r11
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- (sizeof(struct frame) - sizeof(u_int)));
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else {
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if (trace_thread) {
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struct proc *p;
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struct user *u;
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(*pr)("trace: pid %d ", (int)addr);
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p = pfind(addr);
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if (p == NULL) {
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(*pr)("not found\n");
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return;
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}
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if (!(p->p_flag & P_INMEM)) {
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(*pr)("swapped out\n");
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return;
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}
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u = p->p_addr;
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frame = (struct frame *) (u->u_pcb.pcb_r11
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- (sizeof(struct frame) - sizeof(u_int)));
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(*pr)("at %p\n", frame);
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} else
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frame = (struct frame *)(addr - (sizeof(struct frame)
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- sizeof(u_int)));
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}
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lastframe = NULL;
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while (count--) {
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db_expr_t offset;
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char *name;
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db_addr_t pc;
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/* (*pr)("fp=%08x: fp=%08x sp=%08x lr=%08x pc=%08x\n",
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(u_int)frame, frame->fr_fp, frame->fr_sp, frame->fr_lr,
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frame->fr_pc);*/
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pc = frame->fr_pc;
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/* Adjust the PC so the same address is printed no matter what CPU */
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if (cputype == CPU_ID_SA110 || cputype == CPU_ID_ARM810)
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pc += 4;
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if (!INKERNEL(pc))
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break;
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db_find_sym_and_offset(pc, &name, &offset);
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if (name == NULL)
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name = "?";
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(*pr)("%s(", name);
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db_printsym(pc, DB_STGY_PROC, pr);
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(*pr)(")");
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(*pr)("\n");
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/*
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* Switch to next frame up
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*/
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lastframe = frame;
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frame = (struct frame *)(frame->fr_fp - (sizeof(struct frame)
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- sizeof(u_int)));
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if (frame == NULL)
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break;
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if (INKERNEL((int)frame)) {
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/* staying in kernel */
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if (frame <= lastframe) {
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(*pr)("Bad frame pointer: %p\n", frame);
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break;
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}
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} else if (INKERNEL((int)lastframe)) {
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/* switch from user to kernel */
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if (kernel_only)
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break; /* kernel stack only */
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} else {
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/* in user */
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if (frame <= lastframe) {
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(*pr)("Bad user frame pointer: %p\n",
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frame);
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break;
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}
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}
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}
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}
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