2000-05-25 06:32:58 +08:00
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/* Native-dependent code for modern i386 BSD's.
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2001-03-01 09:39:22 +08:00
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Copyright 2000, 2001 Free Software Foundation, Inc.
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2000-05-25 06:32:58 +08:00
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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,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "inferior.h"
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2001-03-01 09:39:22 +08:00
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#include "regcache.h"
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2000-05-25 06:32:58 +08:00
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* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
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#include "gdb_assert.h"
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2001-07-14 02:27:21 +08:00
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#include <signal.h>
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#include <stddef.h>
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2000-05-25 06:32:58 +08:00
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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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#ifdef HAVE_SYS_PROCFS_H
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#include <sys/procfs.h>
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#endif
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#ifndef HAVE_GREGSET_T
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typedef struct reg gregset_t;
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#endif
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#ifndef HAVE_FPREGSET_T
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typedef struct fpreg fpregset_t;
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#endif
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2000-06-01 07:14:19 +08:00
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#include "gregset.h"
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2000-05-25 06:32:58 +08:00
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/* In older BSD versions we cannot get at some of the segment
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registers. FreeBSD for example didn't support the %fs and %gs
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registers until the 3.0 release. We have autoconf checks for their
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presence, and deal gracefully with their absence. */
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/* Registers we shouldn't try to fetch. */
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#if !defined (CANNOT_FETCH_REGISTER)
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#define CANNOT_FETCH_REGISTER(regno) cannot_fetch_register (regno)
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#endif
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/* Registers we shouldn't try to store. */
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#if !defined (CANNOT_STORE_REGISTER)
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2000-06-01 07:14:19 +08:00
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#define CANNOT_STORE_REGISTER(regno) cannot_fetch_register (regno)
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2000-05-25 06:32:58 +08:00
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#endif
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/* Offset to the gregset_t location where REG is stored. */
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#define REG_OFFSET(reg) offsetof (gregset_t, reg)
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/* At reg_offset[REGNO] you'll find the offset to the gregset_t
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location where the GDB register REGNO is stored. Unsupported
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registers are marked with `-1'. */
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static int reg_offset[] =
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{
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REG_OFFSET (r_eax),
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REG_OFFSET (r_ecx),
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REG_OFFSET (r_edx),
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REG_OFFSET (r_edx),
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REG_OFFSET (r_esp),
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REG_OFFSET (r_ebp),
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REG_OFFSET (r_esi),
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REG_OFFSET (r_edi),
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REG_OFFSET (r_eip),
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REG_OFFSET (r_eflags),
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REG_OFFSET (r_cs),
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REG_OFFSET (r_ss),
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REG_OFFSET (r_ds),
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REG_OFFSET (r_es),
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2000-06-06 02:59:40 +08:00
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#ifdef HAVE_STRUCT_REG_R_FS
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2000-05-25 06:32:58 +08:00
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REG_OFFSET (r_fs),
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#else
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-1,
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#endif
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2000-06-06 02:59:40 +08:00
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#ifdef HAVE_STRUCT_REG_R_GS
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2000-05-25 06:32:58 +08:00
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REG_OFFSET (r_gs)
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#else
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-1
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#endif
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};
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#define REG_ADDR(regset, regno) ((char *) (regset) + reg_offset[regno])
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/* Return nonzero if we shouldn't try to fetch register REGNO. */
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static int
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cannot_fetch_register (int regno)
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{
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return (reg_offset[regno] == -1);
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}
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/* Transfering the registers between GDB, inferiors and core files. */
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2001-01-04 05:12:18 +08:00
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/* Fill GDB's register array with the general-purpose register values
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2000-05-25 06:32:58 +08:00
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in *GREGSETP. */
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void
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supply_gregset (gregset_t *gregsetp)
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{
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int i;
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for (i = 0; i < NUM_GREGS; i++)
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{
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if (CANNOT_FETCH_REGISTER (i))
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2000-06-01 07:14:19 +08:00
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supply_register (i, NULL);
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2000-05-25 06:32:58 +08:00
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else
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supply_register (i, REG_ADDR (gregsetp, i));
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}
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}
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/* Fill register REGNO (if it is a general-purpose register) in
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*GREGSETPS with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_gregset (gregset_t *gregsetp, int regno)
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{
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int i;
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for (i = 0; i < NUM_GREGS; i++)
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if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
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2000-06-01 07:14:19 +08:00
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memcpy (REG_ADDR (gregsetp, i), ®isters[REGISTER_BYTE (i)],
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2000-05-25 06:32:58 +08:00
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REGISTER_RAW_SIZE (i));
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}
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#include "i387-nat.h"
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/* Fill GDB's register array with the floating-point register values
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in *FPREGSETP. */
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void
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supply_fpregset (fpregset_t *fpregsetp)
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{
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i387_supply_fsave ((char *) fpregsetp);
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}
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/* Fill register REGNO (if it is a floating-point register) in
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*FPREGSETP with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_fpregset (fpregset_t *fpregsetp, int regno)
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{
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i387_fill_fsave ((char *) fpregsetp, regno);
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}
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/* Fetch register REGNO from the inferior. If REGNO is -1, do this
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for all registers (including the floating point registers). */
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void
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fetch_inferior_registers (int regno)
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{
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gregset_t gregs;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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2000-05-25 06:32:58 +08:00
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perror_with_name ("Couldn't get registers");
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supply_gregset (&gregs);
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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2000-05-25 06:32:58 +08:00
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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supply_fpregset (&fpregs);
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}
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2000-06-01 07:14:19 +08:00
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}
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2000-05-25 06:32:58 +08:00
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/* Store register REGNO back into the inferior. If REGNO is -1, do
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this for all registers (including the floating point registers). */
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void
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store_inferior_registers (int regno)
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{
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gregset_t gregs;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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2000-05-25 06:32:58 +08:00
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perror_with_name ("Couldn't get registers");
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fill_gregset (&gregs, regno);
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2001-07-14 02:27:21 +08:00
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if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
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2000-05-25 06:32:58 +08:00
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perror_with_name ("Couldn't write registers");
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if (regno == -1 || regno >= FP0_REGNUM)
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{
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fpregset_t fpregs;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
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2000-05-25 06:32:58 +08:00
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't get floating point status");
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fill_fpregset (&fpregs, regno);
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
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2000-05-25 06:32:58 +08:00
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(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
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perror_with_name ("Couldn't write floating point status");
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}
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}
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* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
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/* Support for debug registers. */
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#ifdef HAVE_PT_GETDBREGS
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/* Not all versions of FreeBSD/i386 that support the debug registers
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have this macro. */
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#ifndef DBREG_DRX
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#define DBREG_DRX(d, x) ((&d->dr0)[x])
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#endif
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static void
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i386bsd_dr_set (int regnum, unsigned int value)
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{
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struct dbreg dbregs;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
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* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
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perror_with_name ("Couldn't get debug registers");
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/* For some mysterious reason, some of the reserved bits in the
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debug control register get set. Mask these off, otherwise the
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ptrace call below will fail. */
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dbregs.dr7 &= ~(0x0000fc00);
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DBREG_DRX ((&dbregs), regnum) = value;
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2001-05-04 12:15:33 +08:00
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if (ptrace (PT_SETDBREGS, PIDGET (inferior_ptid),
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(PTRACE_ARG3_TYPE) &dbregs, 0) == -1)
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* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
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perror_with_name ("Couldn't write debug registers");
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|
|
|
|
}
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|
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|
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|
void
|
|
|
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|
i386bsd_dr_set_control (unsigned long control)
|
|
|
|
|
{
|
|
|
|
|
i386bsd_dr_set (7, control);
|
|
|
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|
}
|
|
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|
void
|
|
|
|
|
i386bsd_dr_set_addr (int regnum, CORE_ADDR addr)
|
|
|
|
|
{
|
|
|
|
|
gdb_assert (regnum >= 0 && regnum <= 4);
|
|
|
|
|
|
|
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|
i386bsd_dr_set (regnum, addr);
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|
|
|
}
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|
void
|
|
|
|
|
i386bsd_dr_reset_addr (int regnum)
|
|
|
|
|
{
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|
|
|
|
gdb_assert (regnum >= 0 && regnum <= 4);
|
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|
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|
|
i386bsd_dr_set (regnum, 0);
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|
|
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|
}
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|
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|
|
|
unsigned long
|
|
|
|
|
i386bsd_dr_get_status (void)
|
|
|
|
|
{
|
|
|
|
|
struct dbreg dbregs;
|
|
|
|
|
|
|
|
|
|
/* FIXME: kettenis/2001-03-31: Calling perror_with_name if the
|
|
|
|
|
ptrace call fails breaks debugging remote targets. The correct
|
|
|
|
|
way to fix this is to add the hardware breakpoint and watchpoint
|
2001-07-14 02:27:21 +08:00
|
|
|
|
stuff to the target vector. For now, just return zero if the
|
* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
|
|
|
|
ptrace call fails. */
|
2001-05-04 12:15:33 +08:00
|
|
|
|
if (ptrace (PT_GETDBREGS, PIDGET (inferior_ptid),
|
|
|
|
|
(PTRACE_ARG3_TYPE) & dbregs, 0) == -1)
|
* i386bsd-nat.c: Include "gdb_assert.h".
[HAVE_PT_GETDBREGS] (DBREG_DRX): Define if not
already defined.
[HAVE_PT_GETDBREGS] (i386bsd_dr_set, i386bsd_dr_set_control,
i386bsd_dr_set_addr, i386bsd_dr_reset_addr,
i386bsd_dr_get_status): New functions.
* config/i386/nm-fbsd.h [HAVE_PT_GETDBREGS]
(I386_USE_GENERIC_WATCHPOINTS): Define.
Include "i386/nm-i386.h".
(I386_DR_LOW_SET_CONTROL, I386_DR_LOW_SET_ADDR,
I386_DR_LOW_RESET_ADDR, I386_DR_LOW_GET_STATUS): New macros.
(i386bsd_dr_set_control, i386bsd_dr_set_addr,
i386bsd_dr_reset_addr, i386bsd_dr_get_status): New prototypes.
* acconfig.h (HAVE_PT_GETDBREGS): New configure macro.
* configure.in: Cleanup a few comments. Check for PT_GETDBREGS
ptrace request.
* config.in, configure: Regenerate.
2001-04-01 02:09:03 +08:00
|
|
|
|
#if 0
|
|
|
|
|
perror_with_name ("Couldn't read debug registers");
|
|
|
|
|
#else
|
|
|
|
|
return 0;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
return dbregs.dr6;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* PT_GETDBREGS */
|
|
|
|
|
|
|
|
|
|
|
2000-05-25 06:32:58 +08:00
|
|
|
|
/* Support for the user struct. */
|
|
|
|
|
|
|
|
|
|
/* Return the address register REGNO. BLOCKEND is the value of
|
|
|
|
|
u.u_ar0, which should point to the registers. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
|
register_u_addr (CORE_ADDR blockend, int regno)
|
|
|
|
|
{
|
|
|
|
|
return (CORE_ADDR) REG_ADDR (blockend, regno);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
|
#include <sys/user.h>
|
|
|
|
|
|
|
|
|
|
/* Return the size of the user struct. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
kernel_u_size (void)
|
|
|
|
|
{
|
|
|
|
|
return (sizeof (struct user));
|
|
|
|
|
}
|
2001-07-14 02:27:21 +08:00
|
|
|
|
|
|
|
|
|
/* See i386bsd-tdep.c. */
|
|
|
|
|
extern int i386bsd_sigcontext_pc_offset;
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
_initialize_i386bsd_nat (void)
|
|
|
|
|
{
|
|
|
|
|
/* To support the recognition of signal handlers, i386bsd-tdep.c
|
|
|
|
|
hardcodes some constants. Inclusion of this file means that we
|
|
|
|
|
are compiling a native debugger, which means that we can use the
|
|
|
|
|
system header files and sysctl(3) to get at the relevant
|
|
|
|
|
information. */
|
|
|
|
|
|
|
|
|
|
/* Override the default value for the offset of the program counter
|
|
|
|
|
in the sigcontext structure. */
|
|
|
|
|
i386bsd_sigcontext_pc_offset = offsetof (struct sigcontext, sc_pc);
|
|
|
|
|
}
|