/* $OpenBSD: kgdb_machdep.c,v 1.9 2008/06/26 05:42:10 ray Exp $ */ /* $NetBSD: kgdb_machdep.c,v 1.6 1998/08/13 21:36:03 thorpej 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. */ #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. */ #include #include #include #include #include #include #include /* * Determine if the memory at va..(va+len) is valid. */ int kgdb_acc(vaddr_t va, size_t len) { vaddr_t last_va; pt_entry_t *pte; last_va = va + len; va &= ~PGOFSET; last_va &= ~PGOFSET; do { pte = kvtopte(va); if ((*pte & PG_V) == 0) return (0); va += NBPG; } 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(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(db_regs_t *regs, kgdb_reg_t *gdb_regs) { gdb_regs[ 0] = regs->tf_eax; gdb_regs[ 1] = regs->tf_ecx; gdb_regs[ 2] = regs->tf_edx; gdb_regs[ 3] = regs->tf_ebx; gdb_regs[ 5] = regs->tf_ebp; gdb_regs[ 6] = regs->tf_esi; gdb_regs[ 7] = regs->tf_edi; gdb_regs[ 8] = regs->tf_eip; gdb_regs[ 9] = regs->tf_eflags; gdb_regs[10] = regs->tf_cs; gdb_regs[12] = regs->tf_ds; gdb_regs[13] = regs->tf_es; gdb_regs[14] = regs->tf_fs; gdb_regs[15] = regs->tf_gs; if (KERNELMODE(regs->tf_cs, regs->tf_eflags)) { /* * Kernel mode - esp and ss not saved. */ gdb_regs[ 4] = (kgdb_reg_t)®s->tf_esp; /* kernel stack pointer */ __asm __volatile("movw %%ss,%w0" : "=r" (gdb_regs[11])); } } /* * Reverse the above. */ void kgdb_setregs(db_regs_t *regs, kgdb_reg_t *gdb_regs) { regs->tf_eax = gdb_regs[ 0]; regs->tf_ecx = gdb_regs[ 1]; regs->tf_edx = gdb_regs[ 2]; regs->tf_ebx = gdb_regs[ 3]; regs->tf_ebp = gdb_regs[ 5]; regs->tf_esi = gdb_regs[ 6]; regs->tf_edi = gdb_regs[ 7]; regs->tf_eip = gdb_regs[ 8]; regs->tf_eflags = gdb_regs[ 9]; regs->tf_cs = gdb_regs[10]; regs->tf_ds = gdb_regs[12]; regs->tf_es = gdb_regs[13]; if (KERNELMODE(regs->tf_cs, regs->tf_eflags) == 0) { /* * Trapped in user mode - restore esp and ss. */ regs->tf_esp = gdb_regs[ 4]; regs->tf_ss = gdb_regs[11]; } }