/* $NetBSD: kgdb_machdep.c,v 1.17 2009/11/21 17:40:28 rmind Exp $ */ /*- * Copyright (c) 1997, 2002 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. * * 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 1.17 2009/11/21 17:40:28 rmind Exp $"); #include "opt_ddb.h" #if defined(DDB) #error "Can't build DDB and KGDB together." #endif /* * 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/mips by Ethan Solomita. * Modified for NetBSD/sh3 by UCHIYAMA Yasushi. */ #include <sys/types.h> #include <sys/systm.h> #include <sys/param.h> #include <sys/proc.h> #include <sys/reboot.h> #include <sys/kgdb.h> #include <uvm/uvm_extern.h> #include <sh3/cpu.h> #include <machine/db_machdep.h> #include <ddb/db_access.h> /* * Is kva a valid address to access? This is used by KGDB. */ static int kvacc(vaddr_t kva) { pt_entry_t *pte; if (kva < SH3_P1SEG_BASE) return (0); if (kva < SH3_P2SEG_BASE) return (1); if (kva >= VM_MAX_KERNEL_ADDRESS) return (0); /* check kva is kernel virtual. */ if ((kva < VM_MIN_KERNEL_ADDRESS) || (kva >= VM_MAX_KERNEL_ADDRESS)) return (0); /* check page which related kva is valid. */ pte = __pmap_kpte_lookup(kva); if (!(*pte & PG_V)) return (0); return (1); } /* * Determine if the memory at va..(va+len) is valid. */ int kgdb_acc(vaddr_t va, size_t len) { vaddr_t last_va; last_va = va + len + PAGE_SIZE - 1; va &= ~PGOFSET; last_va &= ~PGOFSET; for (; va < last_va; va += PAGE_SIZE) { if (kvacc(va) == 0) return 0; } return (1); } /* * Translate a trap number into a unix compatible signal value. * (gdb only understands unix signal numbers). */ int kgdb_signal(int type) { switch (type) { case EXPEVT_TLB_MISS_LD: case EXPEVT_TLB_MISS_ST: case EXPEVT_TLB_MOD: case EXPEVT_TLB_PROT_LD: case EXPEVT_TLB_PROT_ST: case EXPEVT_ADDR_ERR_LD: case EXPEVT_ADDR_ERR_ST: case EXPEVT_TLB_MISS_LD | EXP_USER: case EXPEVT_TLB_MISS_ST | EXP_USER: case EXPEVT_TLB_MOD | EXP_USER: case EXPEVT_TLB_PROT_LD | EXP_USER: case EXPEVT_TLB_PROT_ST | EXP_USER: case EXPEVT_ADDR_ERR_LD | EXP_USER: case EXPEVT_ADDR_ERR_ST | EXP_USER: return (SIGSEGV); case EXPEVT_TRAPA: case EXPEVT_BREAK: case EXPEVT_TRAPA | EXP_USER: case EXPEVT_BREAK | EXP_USER: return (SIGTRAP); case EXPEVT_RES_INST: case EXPEVT_SLOT_INST: case EXPEVT_RES_INST | EXP_USER: case EXPEVT_SLOT_INST | EXP_USER: return (SIGILL); default: return (SIGEMT); } } /* * Translate the values stored in the db_regs_t struct to the format * understood by gdb. (gdb-5.1.1/gdb/config/sh/tm-sh.h) */ void kgdb_getregs(db_regs_t *regs, kgdb_reg_t *gdb_regs) { uint32_t r; memset(gdb_regs, 0, KGDB_NUMREGS * sizeof(kgdb_reg_t)); gdb_regs[ 0] = regs->tf_r0; gdb_regs[ 1] = regs->tf_r1; gdb_regs[ 2] = regs->tf_r2; gdb_regs[ 3] = regs->tf_r3; gdb_regs[ 4] = regs->tf_r4; gdb_regs[ 5] = regs->tf_r5; gdb_regs[ 6] = regs->tf_r6; gdb_regs[ 7] = regs->tf_r7; gdb_regs[ 8] = regs->tf_r8; gdb_regs[ 9] = regs->tf_r9; gdb_regs[10] = regs->tf_r10; gdb_regs[11] = regs->tf_r11; gdb_regs[12] = regs->tf_r12; gdb_regs[13] = regs->tf_r13; gdb_regs[14] = regs->tf_r14; gdb_regs[15] = regs->tf_r15; gdb_regs[16] = regs->tf_spc; gdb_regs[17] = regs->tf_pr; __asm volatile("stc vbr, %0" : "=r"(r)); gdb_regs[19] = r; gdb_regs[20] = regs->tf_mach; gdb_regs[21] = regs->tf_macl; gdb_regs[22] = regs->tf_ssr; /* How treat register bank 1 ? */ } /* * Reverse the above. */ void kgdb_setregs(db_regs_t *regs, kgdb_reg_t *gdb_regs) { regs->tf_r0 = gdb_regs[ 0]; regs->tf_r1 = gdb_regs[ 1]; regs->tf_r2 = gdb_regs[ 2]; regs->tf_r3 = gdb_regs[ 3]; regs->tf_r4 = gdb_regs[ 4]; regs->tf_r5 = gdb_regs[ 5]; regs->tf_r6 = gdb_regs[ 6]; regs->tf_r7 = gdb_regs[ 7]; regs->tf_r8 = gdb_regs[ 8]; regs->tf_r9 = gdb_regs[ 9]; regs->tf_r10 = gdb_regs[10]; regs->tf_r11 = gdb_regs[11]; regs->tf_r12 = gdb_regs[12]; regs->tf_r13 = gdb_regs[13]; regs->tf_r14 = gdb_regs[14]; regs->tf_r15 = gdb_regs[15]; regs->tf_spc = gdb_regs[16]; regs->tf_pr = gdb_regs[17]; __asm volatile("ldc %0, vbr" :: "r"(gdb_regs[19])); regs->tf_mach = gdb_regs[20]; regs->tf_macl = gdb_regs[21]; regs->tf_ssr = gdb_regs[22]; } /* * Trap into kgdb to wait for debugger to connect, * noting on the console why nothing else is going on. */ void kgdb_connect(int verbose) { if (kgdb_dev == NODEV) { printf("kgdb_dev=%"PRId64"\n", kgdb_dev); return; } if (verbose) printf("kgdb waiting..."); __asm volatile("trapa %0" :: "i"(_SH_TRA_BREAK)); 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(void) { if (kgdb_dev != NODEV && kgdb_debug_panic) { printf("entering kgdb\n"); kgdb_connect(kgdb_active == 0); } }
