/* $NetBSD: kgdb_machdep.c,v 1.3 2008/04/28 20:23:12 martin Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1996 Matthias Pfaller. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Matthias Pfaller. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: kgdb_machdep.c,v 1.3 2008/04/28 20:23:12 martin Exp $"); #include "opt_ddb.h" /* * Machine-dependent functions for remote KGDB. Originally written * for NetBSD/pc532 by Matthias Pfaller. Modified for NetBSD/i386 * by Jason R. Thorpe. Modified for NetBSD/amd64 by Frank van der Linden. */ #include <sys/param.h> #include <sys/kgdb.h> #include <sys/systm.h> #include <uvm/uvm_extern.h> #include <machine/pte.h> #include <machine/trap.h> /* * Determine if the memory at va..(va+len) is valid. */ int kgdb_acc(va, len) vaddr_t va; size_t len; { vaddr_t last_va; pt_entry_t *pte; last_va = va + len; va &= ~PGOFSET; last_va &= ~PGOFSET; do { if (va < VM_MIN_KERNEL_ADDRESS) pte = vtopte(va); else pte = kvtopte(va); if ((*pte & PG_V) == 0) return (0); va += PAGE_SIZE; } while (va < last_va); return (1); } /* * Translate a trap number into a unix compatible signal value. * (gdb only understands unix signal numbers). */ int kgdb_signal(type) int type; { switch (type) { case T_NMI: return (SIGINT); case T_ALIGNFLT: return (SIGILL); case T_BPTFLT: case T_TRCTRAP: return (SIGTRAP); case T_ASTFLT: case T_DOUBLEFLT: return (SIGEMT); case T_ARITHTRAP: case T_DIVIDE: case T_OFLOW: case T_DNA: case T_FPOPFLT: return (SIGFPE); case T_PRIVINFLT: case T_PROTFLT: case T_PAGEFLT: case T_TSSFLT: case T_SEGNPFLT: case T_STKFLT: return (SIGSEGV); case T_BOUND: return (SIGURG); default: return (SIGEMT); } } /* * Translate the values stored in the kernel regs struct to the format * understood by gdb. */ void kgdb_getregs(regs, gdb_regs) db_regs_t *regs; kgdb_reg_t *gdb_regs; { memcpy(gdb_regs, regs, sizeof *regs); } /* * Reverse the above. */ void kgdb_setregs(regs, gdb_regs) db_regs_t *regs; kgdb_reg_t *gdb_regs; { memcpy(regs, gdb_regs, sizeof *regs); } /* * Trap into kgdb to wait for debugger to connect, * noting on the console why nothing else is going on. */ void kgdb_connect(verbose) int verbose; { if (kgdb_dev < 0) return; if (verbose) printf("kgdb waiting..."); breakpoint(); if (verbose) printf("connected.\n"); kgdb_debug_panic = 1; } /* * Decide what to do on panic. * (This is called by panic, like Debugger()) */ void kgdb_panic() { if (kgdb_dev >= 0 && kgdb_debug_panic) { printf("entering kgdb\n"); kgdb_connect(kgdb_active == 0); } }