/* Native-dependent code for BSD Unix running on i386's, for GDB. Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "defs.h" #include <machine/reg.h> /* this table must line up with REGISTER_NAMES in tm-i386.h */ /* symbols like 'tEAX' come from <machine/reg.h> */ static int tregmap[] = { tEAX, tECX, tEDX, tEBX, tESP, tEBP, tESI, tEDI, tEIP, tEFLAGS, tCS, tSS }; static int sregmap[] = { sEAX, sECX, sEDX, sEBX, sESP, sEBP, sESI, sEDI, sEIP, sEFLAGS, sCS, sSS }; /* blockend is the value of u.u_ar0, and points to the place where ES is stored. */ int i386_register_u_addr (blockend, regnum) int blockend; int regnum; { /* The following condition is a kludge to get at the proper register map depending upon the state of pcb_flag. The proper condition would be if (u.u_pcb.pcb_flag & FM_TRAP) but that would require a ptrace call here and wouldn't work for corefiles. */ if (blockend < 0x1fcc) return (blockend + 4 * tregmap[regnum]); else return (blockend + 4 * sregmap[regnum]); } /*XXX!!!*/ /* BSDI $Id: i386bsd-xdep.c,v 1.2 1992/09/02 17:43:24 trent Exp $ */ /* * GDB support code for BSD/386. */ #include <sys/param.h> #include <sys/ptrace.h> #include <sys/user.h> #include <machine/frame.h> #include <machine/reg.h> #include "defs.h" #include "inferior.h" #if !defined (offsetof) #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) #endif static int trapmap[] = { tEAX, tECX, tEDX, tEBX, tESP, tEBP, tESI, tEDI, tEIP, tEFLAGS, tCS, tSS, tDS, tES, tES, tES }; static int syscmap[] = { sEAX, sECX, sEDX, sEBX, sESP, sEBP, sESI, sEDI, sEIP, sEFLAGS, sCS, sSS, sCS, sCS, sCS, sCS }; static int *regmap; static unsigned long *reg_offset; /* * There aren't that many registers -- might as well fetch them all, * and avoid repeatedly paying for those pcb and kproc reads. */ void fetch_inferior_registers(int regno) { int i; int val; if (ptrace(PT_READ_U, inferior_pid, (caddr_t)offsetof(struct user, u_pcb.pcb_flags), 0) & FM_TRAP) regmap = trapmap; else regmap = syscmap; reg_offset = (unsigned long *) (ptrace(PT_READ_U, inferior_pid, (caddr_t) offsetof(struct user, u_kproc.kp_proc.p_regs), 0) - VM_MAXUSER_ADDRESS); for (i = 0; i < NUM_REGS; ++i) { val = ptrace(PT_READ_U, inferior_pid, (caddr_t)®_offset[regmap[i]], 0); supply_register(i, (char *)&val); } /* FP registers? */ } /* * Should we bother to defer any stores? */ void store_inferior_registers(int regno) { int i; if (regno >= 0) { ptrace(PT_WRITE_U, inferior_pid, (caddr_t) ®_offset[regmap[regno]], *(int *)®isters[REGISTER_BYTE(regno)]); return; } for (i = 0; i < NUM_REGS; ++i) ptrace(PT_WRITE_U, inferior_pid, (caddr_t) ®_offset[regmap[i]], *(int *)®isters[REGISTER_BYTE(i)]); } void fetch_core_registers(char *upage, unsigned size, int which, unsigned reg_addr) { struct user *up; unsigned long *core_regs; int i; if (which) return; up = (struct user *)upage; core_regs = (unsigned long *)(upage + ((unsigned long)up->u_kproc.kp_proc.p_regs - VM_MAXUSER_ADDRESS)); regmap = up->u_pcb.pcb_flags & FM_TRAP ? trapmap : syscmap; for (i = 0; i < NUM_REGS; ++i) supply_register(i, (char *)&core_regs[regmap[i]]); }