176 lines
4.6 KiB
C
176 lines
4.6 KiB
C
/* Native-dependent code for BSD Unix running on i386's, for GDB.
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Copyright 1988, 1989, 1991, 1992, 1994, 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* $FreeBSD$ */
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#include "defs.h"
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#include <string.h>
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#include "gdbcore.h"
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#include "value.h"
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#include "inferior.h"
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#if defined(HAVE_GREGSET_T)
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#include <sys/procfs.h>
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#endif
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int kernel_debugging = 0;
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/* Size of elements in jmpbuf */
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#define JB_ELEMENT_SIZE 8
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/* The definition for JB_PC in machine/reg.h is wrong.
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And we can't get at the correct definition in setjmp.h as it is
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not always available (eg. if _POSIX_SOURCE is defined which is the
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default). As the defintion is unlikely to change (see comment
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in <setjmp.h>, define the correct value here. */
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#undef JB_PC
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#define JB_PC 2
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/* Figure out where the longjmp will land.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
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This routine returns true on success. */
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int
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get_longjmp_target (pc)
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CORE_ADDR *pc;
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{
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CORE_ADDR jb_addr;
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char raw_buffer[MAX_REGISTER_RAW_SIZE];
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jb_addr = read_register(A0_REGNUM);
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if (target_read_memory(jb_addr + JB_PC * JB_ELEMENT_SIZE, raw_buffer,
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sizeof(CORE_ADDR)))
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return 0;
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*pc = extract_address (raw_buffer, sizeof(CORE_ADDR));
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return 1;
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}
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct reg regs; /* ptrace order, not gcc/gdb order */
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struct fpreg fpregs;
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int r;
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ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
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ptrace (PT_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
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for (r = 0; r < 31; r++)
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memcpy (®isters[REGISTER_BYTE (r)],
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®s.r_regs[r], sizeof(u_int64_t));
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for (r = 0; r < 32; r++)
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memcpy (®isters[REGISTER_BYTE (r + FP0_REGNUM)],
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&fpregs.fpr_regs[r], sizeof(u_int64_t));
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memcpy (®isters[REGISTER_BYTE (PC_REGNUM)],
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®s.r_regs[31], sizeof(u_int64_t));
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memset (®isters[REGISTER_BYTE (ZERO_REGNUM)], 0, sizeof(u_int64_t));
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memset (®isters[REGISTER_BYTE (FP_REGNUM)], 0, sizeof(u_int64_t));
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registers_fetched ();
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}
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void
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store_inferior_registers (regno)
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int regno;
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{
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struct reg regs; /* ptrace order, not gcc/gdb order */
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struct fpreg fpregs;
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int r;
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for (r = 0; r < 31; r++)
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memcpy (®s.r_regs[r],
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®isters[REGISTER_BYTE (r)], sizeof(u_int64_t));
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for (r = 0; r < 32; r++)
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memcpy (&fpregs.fpr_regs[r],
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®isters[REGISTER_BYTE (r + FP0_REGNUM)], sizeof(u_int64_t));
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memcpy (®s.r_regs[31],
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®isters[REGISTER_BYTE (PC_REGNUM)], sizeof(u_int64_t));
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ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
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ptrace (PT_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
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}
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#ifdef HAVE_GREGSET_T
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void
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supply_gregset (gp)
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gregset_t *gp;
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{
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int regno = 0;
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/* These must be ordered the same as REGISTER_NAMES in
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config/alpha/tm-alpha.h. */
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for (regno = 0; regno < 31; regno++)
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supply_register (regno, (char *)&gp->r_regs[regno]);
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supply_register (PC_REGNUM, (char *)&gp->r_regs[regno]);
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}
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#endif /* HAVE_GREGSET_T */
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#ifdef HAVE_FPREGSET_T
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void
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supply_fpregset (fp)
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fpregset_t *fp;
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{
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int regno = 0;
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for (regno = 0; regno < 32; regno++)
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supply_register (regno + 32, (char *)&fp->fpr_regs[regno]);
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}
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#endif /* HAVE_FPREGSET_T */
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/*
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* Get registers from a kernel crash dump or live kernel.
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* Called by kvm-fbsd.c:get_kcore_registers().
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*/
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fetch_kcore_registers (pcbp)
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struct pcb *pcbp;
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{
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/* First clear out any garbage. */
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memset(registers, '\0', REGISTER_BYTES);
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/* SP */
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*(long *) ®isters[REGISTER_BYTE (SP_REGNUM)] =
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pcbp->pcb_hw.apcb_ksp;
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/* S0 through S6 */
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memcpy (®isters[REGISTER_BYTE (S0_REGNUM)],
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&pcbp->pcb_context[0], 7 * sizeof(long));
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/* PC */
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*(long *) ®isters[REGISTER_BYTE (PC_REGNUM)] =
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pcbp->pcb_context[7];
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registers_fetched ();
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}
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