/* Motorola m68k native support for GNU/Linux.
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/* Motorola m68k native support for GNU/Linux.
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Copyright 1996, 1998, 2000, 2001, 2002 Free Software Foundation,
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Copyright 1996, 1998, 2000, 2001, 2002 Free Software Foundation,
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Inc.
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Inc.
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This file is part of GDB.
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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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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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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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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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(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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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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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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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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "defs.h"
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#include "frame.h"
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#include "frame.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "language.h"
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#include "language.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "regcache.h"
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#ifdef USG
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#ifdef USG
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#include <sys/types.h>
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#include <sys/types.h>
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#endif
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#endif
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#include <sys/param.h>
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#include <sys/param.h>
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#include <sys/dir.h>
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#include <sys/dir.h>
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#include <signal.h>
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#include <signal.h>
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#include <sys/ptrace.h>
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#include <sys/ptrace.h>
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#include <sys/user.h>
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#include <sys/user.h>
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#include <sys/ioctl.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <sys/procfs.h>
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#include <sys/procfs.h>
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#ifdef HAVE_SYS_REG_H
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#include <sys/reg.h>
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#endif
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#endif
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#include <sys/file.h>
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#include <sys/file.h>
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#include "gdb_stat.h"
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#include "gdb_stat.h"
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#include "floatformat.h"
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#include "floatformat.h"
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#include "target.h"
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#include "target.h"
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/* This table must line up with REGISTER_NAMES in tm-m68k.h */
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/* This table must line up with REGISTER_NAMES in tm-m68k.h */
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static const int regmap[] =
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static const int regmap[] =
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{
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{
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PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
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PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
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PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
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PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
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PT_SR, PT_PC,
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PT_SR, PT_PC,
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/* PT_FP0, ..., PT_FP7 */
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/* PT_FP0, ..., PT_FP7 */
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21, 24, 27, 30, 33, 36, 39, 42,
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21, 24, 27, 30, 33, 36, 39, 42,
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/* PT_FPCR, PT_FPSR, PT_FPIAR */
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/* PT_FPCR, PT_FPSR, PT_FPIAR */
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45, 46, 47
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45, 46, 47
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};
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};
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/* Which ptrace request retrieves which registers?
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/* Which ptrace request retrieves which registers?
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These apply to the corresponding SET requests as well. */
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These apply to the corresponding SET requests as well. */
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#define NUM_GREGS (18)
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#define NUM_GREGS (18)
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#define MAX_NUM_REGS (NUM_GREGS + 11)
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#define MAX_NUM_REGS (NUM_GREGS + 11)
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int
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int
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getregs_supplies (int regno)
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getregs_supplies (int regno)
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{
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{
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return 0 <= regno && regno < NUM_GREGS;
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return 0 <= regno && regno < NUM_GREGS;
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}
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}
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int
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int
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getfpregs_supplies (int regno)
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getfpregs_supplies (int regno)
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{
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{
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return FP0_REGNUM <= regno && regno <= FPI_REGNUM;
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return FP0_REGNUM <= regno && regno <= FPI_REGNUM;
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}
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}
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/* Does the current host support the GETREGS request? */
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/* Does the current host support the GETREGS request? */
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int have_ptrace_getregs =
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int have_ptrace_getregs =
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#ifdef HAVE_PTRACE_GETREGS
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#ifdef HAVE_PTRACE_GETREGS
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1
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1
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#else
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#else
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0
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0
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#endif
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#endif
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;
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;
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/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
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/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
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is stored. */
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is stored. */
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int
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int
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m68k_linux_register_u_addr (int blockend, int regnum)
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m68k_linux_register_u_addr (int blockend, int regnum)
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{
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{
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return (blockend + 4 * regmap[regnum]);
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return (blockend + 4 * regmap[regnum]);
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}
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}
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/* Fetching registers directly from the U area, one at a time. */
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/* Fetching registers directly from the U area, one at a time. */
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/* FIXME: This duplicates code from `inptrace.c'. The problem is that we
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/* FIXME: This duplicates code from `inptrace.c'. The problem is that we
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define FETCH_INFERIOR_REGISTERS since we want to use our own versions
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define FETCH_INFERIOR_REGISTERS since we want to use our own versions
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of {fetch,store}_inferior_registers that use the GETREGS request. This
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of {fetch,store}_inferior_registers that use the GETREGS request. This
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means that the code in `infptrace.c' is #ifdef'd out. But we need to
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means that the code in `infptrace.c' is #ifdef'd out. But we need to
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fall back on that code when GDB is running on top of a kernel that
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fall back on that code when GDB is running on top of a kernel that
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doesn't support the GETREGS request. */
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doesn't support the GETREGS request. */
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#ifndef PT_READ_U
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#ifndef PT_READ_U
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#define PT_READ_U PTRACE_PEEKUSR
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#define PT_READ_U PTRACE_PEEKUSR
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#endif
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#endif
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#ifndef PT_WRITE_U
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#ifndef PT_WRITE_U
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#define PT_WRITE_U PTRACE_POKEUSR
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#define PT_WRITE_U PTRACE_POKEUSR
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#endif
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#endif
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/* Default the type of the ptrace transfer to int. */
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/* Default the type of the ptrace transfer to int. */
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#ifndef PTRACE_XFER_TYPE
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#ifndef PTRACE_XFER_TYPE
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#define PTRACE_XFER_TYPE int
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#define PTRACE_XFER_TYPE int
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#endif
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#endif
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/* Fetch one register. */
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/* Fetch one register. */
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static void
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static void
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fetch_register (int regno)
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fetch_register (int regno)
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{
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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/* This isn't really an address. But ptrace thinks of it as one. */
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CORE_ADDR regaddr;
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CORE_ADDR regaddr;
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char mess[128]; /* For messages */
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char mess[128]; /* For messages */
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register int i;
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register int i;
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unsigned int offset; /* Offset of registers within the u area. */
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unsigned int offset; /* Offset of registers within the u area. */
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char buf[MAX_REGISTER_RAW_SIZE];
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char buf[MAX_REGISTER_RAW_SIZE];
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int tid;
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int tid;
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if (CANNOT_FETCH_REGISTER (regno))
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if (CANNOT_FETCH_REGISTER (regno))
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{
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{
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memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
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memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */
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supply_register (regno, buf);
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supply_register (regno, buf);
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return;
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return;
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}
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}
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/* Overload thread id onto process id */
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/* Overload thread id onto process id */
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if ((tid = TIDGET (inferior_ptid)) == 0)
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if ((tid = TIDGET (inferior_ptid)) == 0)
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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offset = U_REGS_OFFSET;
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offset = U_REGS_OFFSET;
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regaddr = register_addr (regno, offset);
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regaddr = register_addr (regno, offset);
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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{
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{
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errno = 0;
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errno = 0;
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*(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
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*(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid,
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(PTRACE_ARG3_TYPE) regaddr, 0);
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(PTRACE_ARG3_TYPE) regaddr, 0);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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if (errno != 0)
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{
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{
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sprintf (mess, "reading register %s (#%d)",
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sprintf (mess, "reading register %s (#%d)",
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REGISTER_NAME (regno), regno);
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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perror_with_name (mess);
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}
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}
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}
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}
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supply_register (regno, buf);
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supply_register (regno, buf);
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}
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}
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/* Fetch register values from the inferior.
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/* Fetch register values from the inferior.
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If REGNO is negative, do this for all registers.
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If REGNO is negative, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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void
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old_fetch_inferior_registers (int regno)
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old_fetch_inferior_registers (int regno)
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{
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{
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if (regno >= 0)
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if (regno >= 0)
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{
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{
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fetch_register (regno);
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fetch_register (regno);
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}
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}
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else
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else
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{
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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{
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fetch_register (regno);
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fetch_register (regno);
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}
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}
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}
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}
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}
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}
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/* Store one register. */
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/* Store one register. */
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static void
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static void
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store_register (int regno)
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store_register (int regno)
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{
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{
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/* This isn't really an address. But ptrace thinks of it as one. */
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/* This isn't really an address. But ptrace thinks of it as one. */
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CORE_ADDR regaddr;
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CORE_ADDR regaddr;
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char mess[128]; /* For messages */
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char mess[128]; /* For messages */
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register int i;
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register int i;
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unsigned int offset; /* Offset of registers within the u area. */
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unsigned int offset; /* Offset of registers within the u area. */
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int tid;
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int tid;
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char *buf = alloca (MAX_REGISTER_RAW_SIZE);
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char *buf = alloca (MAX_REGISTER_RAW_SIZE);
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if (CANNOT_STORE_REGISTER (regno))
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if (CANNOT_STORE_REGISTER (regno))
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{
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{
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return;
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return;
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}
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}
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/* Overload thread id onto process id */
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/* Overload thread id onto process id */
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if ((tid = TIDGET (inferior_ptid)) == 0)
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if ((tid = TIDGET (inferior_ptid)) == 0)
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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tid = PIDGET (inferior_ptid); /* no thread id, just use process id */
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offset = U_REGS_OFFSET;
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offset = U_REGS_OFFSET;
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regaddr = register_addr (regno, offset);
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regaddr = register_addr (regno, offset);
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/* Put the contents of regno into a local buffer */
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/* Put the contents of regno into a local buffer */
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regcache_collect (regno, buf);
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regcache_collect (regno, buf);
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/* Store the local buffer into the inferior a chunk at the time. */
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/* Store the local buffer into the inferior a chunk at the time. */
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE))
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{
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{
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errno = 0;
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errno = 0;
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ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
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ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr,
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*(PTRACE_XFER_TYPE *) (buf + i));
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*(PTRACE_XFER_TYPE *) (buf + i));
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regaddr += sizeof (PTRACE_XFER_TYPE);
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regaddr += sizeof (PTRACE_XFER_TYPE);
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if (errno != 0)
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if (errno != 0)
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{
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{
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sprintf (mess, "writing register %s (#%d)",
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sprintf (mess, "writing register %s (#%d)",
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REGISTER_NAME (regno), regno);
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REGISTER_NAME (regno), regno);
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perror_with_name (mess);
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perror_with_name (mess);
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}
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}
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}
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}
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}
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}
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/* Store our register values back into the inferior.
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/* Store our register values back into the inferior.
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If REGNO is negative, do this for all registers.
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If REGNO is negative, do this for all registers.
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Otherwise, REGNO specifies which register (so we can save time). */
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Otherwise, REGNO specifies which register (so we can save time). */
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void
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void
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old_store_inferior_registers (int regno)
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old_store_inferior_registers (int regno)
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{
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{
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if (regno >= 0)
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if (regno >= 0)
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{
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{
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store_register (regno);
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store_register (regno);
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}
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}
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else
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else
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{
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{
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for (regno = 0; regno < NUM_REGS; regno++)
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for (regno = 0; regno < NUM_REGS; regno++)
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{
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{
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store_register (regno);
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store_register (regno);
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}
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}
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}
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}
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}
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}
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/* Given a pointer to a general register set in /proc format
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/* Given a pointer to a general register set in /proc format
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(elf_gregset_t *), unpack the register contents and supply
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(elf_gregset_t *), unpack the register contents and supply
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them as gdb's idea of the current register values. */
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them as gdb's idea of the current register values. */
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/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
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/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
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for supply_gregset and supply_fpregset. The definitions
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for supply_gregset and supply_fpregset. The definitions
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in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
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in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
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the definitions in m68klinux-nat.c will be used. This is a
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the definitions in m68klinux-nat.c will be used. This is a
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bit of a hack. The supply_* routines do not belong in
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bit of a hack. The supply_* routines do not belong in
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*_tdep.c files. But, there are several lynx ports that currently
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*_tdep.c files. But, there are several lynx ports that currently
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depend on these definitions. */
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depend on these definitions. */
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#ifndef USE_PROC_FS
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#ifndef USE_PROC_FS
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/* Prototypes for supply_gregset etc. */
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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#include "gregset.h"
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void
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void
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supply_gregset (elf_gregset_t *gregsetp)
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supply_gregset (elf_gregset_t *gregsetp)
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{
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{
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elf_greg_t *regp = (elf_greg_t *) gregsetp;
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elf_greg_t *regp = (elf_greg_t *) gregsetp;
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int regi;
|
int regi;
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|
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for (regi = D0_REGNUM; regi <= SP_REGNUM; regi++)
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for (regi = D0_REGNUM; regi <= SP_REGNUM; regi++)
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supply_register (regi, (char *) ®p[regmap[regi]]);
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supply_register (regi, (char *) ®p[regmap[regi]]);
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supply_register (PS_REGNUM, (char *) ®p[PT_SR]);
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supply_register (PS_REGNUM, (char *) ®p[PT_SR]);
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supply_register (PC_REGNUM, (char *) ®p[PT_PC]);
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supply_register (PC_REGNUM, (char *) ®p[PT_PC]);
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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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/* Fill register REGNO (if it is a general-purpose register) in
|
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
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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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do this for all registers. */
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void
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void
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fill_gregset (elf_gregset_t *gregsetp, int regno)
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fill_gregset (elf_gregset_t *gregsetp, int regno)
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{
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{
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elf_greg_t *regp = (elf_greg_t *) gregsetp;
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elf_greg_t *regp = (elf_greg_t *) gregsetp;
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int i;
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int i;
|
|
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for (i = 0; i < NUM_GREGS; i++)
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for (i = 0; i < NUM_GREGS; i++)
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if ((regno == -1 || regno == i))
|
if ((regno == -1 || regno == i))
|
regcache_collect (i, regp + regmap[i]);
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regcache_collect (i, regp + regmap[i]);
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}
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}
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|
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#ifdef HAVE_PTRACE_GETREGS
|
#ifdef HAVE_PTRACE_GETREGS
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|
|
/* Fetch all general-purpose registers from process/thread TID and
|
/* Fetch all general-purpose registers from process/thread TID and
|
store their values in GDB's register array. */
|
store their values in GDB's register array. */
|
|
|
static void
|
static void
|
fetch_regs (int tid)
|
fetch_regs (int tid)
|
{
|
{
|
elf_gregset_t regs;
|
elf_gregset_t regs;
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
{
|
{
|
if (errno == EIO)
|
if (errno == EIO)
|
{
|
{
|
/* The kernel we're running on doesn't support the GETREGS
|
/* The kernel we're running on doesn't support the GETREGS
|
request. Reset `have_ptrace_getregs'. */
|
request. Reset `have_ptrace_getregs'. */
|
have_ptrace_getregs = 0;
|
have_ptrace_getregs = 0;
|
return;
|
return;
|
}
|
}
|
|
|
perror_with_name ("Couldn't get registers");
|
perror_with_name ("Couldn't get registers");
|
}
|
}
|
|
|
supply_gregset (®s);
|
supply_gregset (®s);
|
}
|
}
|
|
|
/* Store all valid general-purpose registers in GDB's register array
|
/* Store all valid general-purpose registers in GDB's register array
|
into the process/thread specified by TID. */
|
into the process/thread specified by TID. */
|
|
|
static void
|
static void
|
store_regs (int tid, int regno)
|
store_regs (int tid, int regno)
|
{
|
{
|
elf_gregset_t regs;
|
elf_gregset_t regs;
|
|
|
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0)
|
perror_with_name ("Couldn't get registers");
|
perror_with_name ("Couldn't get registers");
|
|
|
fill_gregset (®s, regno);
|
fill_gregset (®s, regno);
|
|
|
if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0)
|
if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0)
|
perror_with_name ("Couldn't write registers");
|
perror_with_name ("Couldn't write registers");
|
}
|
}
|
|
|
#else
|
#else
|
|
|
static void fetch_regs (int tid) {}
|
static void fetch_regs (int tid) {}
|
static void store_regs (int tid, int regno) {}
|
static void store_regs (int tid, int regno) {}
|
|
|
#endif
|
#endif
|
|
|
|
|
/* Transfering floating-point registers between GDB, inferiors and cores. */
|
/* Transfering floating-point registers between GDB, inferiors and cores. */
|
|
|
/* What is the address of fpN within the floating-point register set F? */
|
/* What is the address of fpN within the floating-point register set F? */
|
#define FPREG_ADDR(f, n) ((char *) &(f)->fpregs[(n) * 3])
|
#define FPREG_ADDR(f, n) ((char *) &(f)->fpregs[(n) * 3])
|
|
|
/* Fill GDB's register array with the floating-point register values in
|
/* Fill GDB's register array with the floating-point register values in
|
*FPREGSETP. */
|
*FPREGSETP. */
|
|
|
void
|
void
|
supply_fpregset (elf_fpregset_t *fpregsetp)
|
supply_fpregset (elf_fpregset_t *fpregsetp)
|
{
|
{
|
int regi;
|
int regi;
|
|
|
for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
|
for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
|
supply_register (regi, FPREG_ADDR (fpregsetp, regi - FP0_REGNUM));
|
supply_register (regi, FPREG_ADDR (fpregsetp, regi - FP0_REGNUM));
|
supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
|
supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
|
supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
|
supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
|
supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
|
supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
|
}
|
}
|
|
|
/* Fill register REGNO (if it is a floating-point register) in
|
/* Fill register REGNO (if it is a floating-point register) in
|
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
|
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
|
do this for all registers. */
|
do this for all registers. */
|
|
|
void
|
void
|
fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
|
fill_fpregset (elf_fpregset_t *fpregsetp, int regno)
|
{
|
{
|
int i;
|
int i;
|
|
|
/* Fill in the floating-point registers. */
|
/* Fill in the floating-point registers. */
|
for (i = FP0_REGNUM; i < FP0_REGNUM + 8; i++)
|
for (i = FP0_REGNUM; i < FP0_REGNUM + 8; i++)
|
if (regno == -1 || regno == i)
|
if (regno == -1 || regno == i)
|
regcache_collect (regno, FPREG_ADDR (fpregsetp, regno - FP0_REGNUM));
|
regcache_collect (regno, FPREG_ADDR (fpregsetp, regno - FP0_REGNUM));
|
|
|
/* Fill in the floating-point control registers. */
|
/* Fill in the floating-point control registers. */
|
for (i = FPC_REGNUM; i <= FPI_REGNUM; i++)
|
for (i = FPC_REGNUM; i <= FPI_REGNUM; i++)
|
if (regno == -1 || regno == i)
|
if (regno == -1 || regno == i)
|
regcache_collect (regno, (char *) &fpregsetp->fpcntl[regno - FPC_REGNUM]);
|
regcache_collect (regno, (char *) &fpregsetp->fpcntl[regno - FPC_REGNUM]);
|
}
|
}
|
|
|
#ifdef HAVE_PTRACE_GETREGS
|
#ifdef HAVE_PTRACE_GETREGS
|
|
|
/* Fetch all floating-point registers from process/thread TID and store
|
/* Fetch all floating-point registers from process/thread TID and store
|
thier values in GDB's register array. */
|
thier values in GDB's register array. */
|
|
|
static void
|
static void
|
fetch_fpregs (int tid)
|
fetch_fpregs (int tid)
|
{
|
{
|
elf_fpregset_t fpregs;
|
elf_fpregset_t fpregs;
|
|
|
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
perror_with_name ("Couldn't get floating point status");
|
perror_with_name ("Couldn't get floating point status");
|
|
|
supply_fpregset (&fpregs);
|
supply_fpregset (&fpregs);
|
}
|
}
|
|
|
/* Store all valid floating-point registers in GDB's register array
|
/* Store all valid floating-point registers in GDB's register array
|
into the process/thread specified by TID. */
|
into the process/thread specified by TID. */
|
|
|
static void
|
static void
|
store_fpregs (int tid, int regno)
|
store_fpregs (int tid, int regno)
|
{
|
{
|
elf_fpregset_t fpregs;
|
elf_fpregset_t fpregs;
|
|
|
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0)
|
perror_with_name ("Couldn't get floating point status");
|
perror_with_name ("Couldn't get floating point status");
|
|
|
fill_fpregset (&fpregs, regno);
|
fill_fpregset (&fpregs, regno);
|
|
|
if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0)
|
if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0)
|
perror_with_name ("Couldn't write floating point status");
|
perror_with_name ("Couldn't write floating point status");
|
}
|
}
|
|
|
#else
|
#else
|
|
|
static void fetch_fpregs (int tid) {}
|
static void fetch_fpregs (int tid) {}
|
static void store_fpregs (int tid, int regno) {}
|
static void store_fpregs (int tid, int regno) {}
|
|
|
#endif
|
#endif
|
|
|
#endif
|
#endif
|
|
|
/* Transferring arbitrary registers between GDB and inferior. */
|
/* Transferring arbitrary registers between GDB and inferior. */
|
|
|
/* Fetch register REGNO from the child process. If REGNO is -1, do
|
/* Fetch register REGNO from the child process. If REGNO is -1, do
|
this for all registers (including the floating point and SSE
|
this for all registers (including the floating point and SSE
|
registers). */
|
registers). */
|
|
|
void
|
void
|
fetch_inferior_registers (int regno)
|
fetch_inferior_registers (int regno)
|
{
|
{
|
int tid;
|
int tid;
|
|
|
/* Use the old method of peeking around in `struct user' if the
|
/* Use the old method of peeking around in `struct user' if the
|
GETREGS request isn't available. */
|
GETREGS request isn't available. */
|
if (! have_ptrace_getregs)
|
if (! have_ptrace_getregs)
|
{
|
{
|
old_fetch_inferior_registers (regno);
|
old_fetch_inferior_registers (regno);
|
return;
|
return;
|
}
|
}
|
|
|
/* GNU/Linux LWP ID's are process ID's. */
|
/* GNU/Linux LWP ID's are process ID's. */
|
if ((tid = TIDGET (inferior_ptid)) == 0)
|
if ((tid = TIDGET (inferior_ptid)) == 0)
|
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
|
|
/* Use the PTRACE_GETFPXREGS request whenever possible, since it
|
/* Use the PTRACE_GETFPXREGS request whenever possible, since it
|
transfers more registers in one system call, and we'll cache the
|
transfers more registers in one system call, and we'll cache the
|
results. But remember that fetch_fpxregs can fail, and return
|
results. But remember that fetch_fpxregs can fail, and return
|
zero. */
|
zero. */
|
if (regno == -1)
|
if (regno == -1)
|
{
|
{
|
fetch_regs (tid);
|
fetch_regs (tid);
|
|
|
/* The call above might reset `have_ptrace_getregs'. */
|
/* The call above might reset `have_ptrace_getregs'. */
|
if (! have_ptrace_getregs)
|
if (! have_ptrace_getregs)
|
{
|
{
|
old_fetch_inferior_registers (-1);
|
old_fetch_inferior_registers (-1);
|
return;
|
return;
|
}
|
}
|
|
|
fetch_fpregs (tid);
|
fetch_fpregs (tid);
|
return;
|
return;
|
}
|
}
|
|
|
if (getregs_supplies (regno))
|
if (getregs_supplies (regno))
|
{
|
{
|
fetch_regs (tid);
|
fetch_regs (tid);
|
return;
|
return;
|
}
|
}
|
|
|
if (getfpregs_supplies (regno))
|
if (getfpregs_supplies (regno))
|
{
|
{
|
fetch_fpregs (tid);
|
fetch_fpregs (tid);
|
return;
|
return;
|
}
|
}
|
|
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
"Got request for bad register number %d.", regno);
|
"Got request for bad register number %d.", regno);
|
}
|
}
|
|
|
/* Store register REGNO back into the child process. If REGNO is -1,
|
/* Store register REGNO back into the child process. If REGNO is -1,
|
do this for all registers (including the floating point and SSE
|
do this for all registers (including the floating point and SSE
|
registers). */
|
registers). */
|
void
|
void
|
store_inferior_registers (int regno)
|
store_inferior_registers (int regno)
|
{
|
{
|
int tid;
|
int tid;
|
|
|
/* Use the old method of poking around in `struct user' if the
|
/* Use the old method of poking around in `struct user' if the
|
SETREGS request isn't available. */
|
SETREGS request isn't available. */
|
if (! have_ptrace_getregs)
|
if (! have_ptrace_getregs)
|
{
|
{
|
old_store_inferior_registers (regno);
|
old_store_inferior_registers (regno);
|
return;
|
return;
|
}
|
}
|
|
|
/* GNU/Linux LWP ID's are process ID's. */
|
/* GNU/Linux LWP ID's are process ID's. */
|
if ((tid = TIDGET (inferior_ptid)) == 0)
|
if ((tid = TIDGET (inferior_ptid)) == 0)
|
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
tid = PIDGET (inferior_ptid); /* Not a threaded program. */
|
|
|
/* Use the PTRACE_SETFPREGS requests whenever possible, since it
|
/* Use the PTRACE_SETFPREGS requests whenever possible, since it
|
transfers more registers in one system call. But remember that
|
transfers more registers in one system call. But remember that
|
store_fpregs can fail, and return zero. */
|
store_fpregs can fail, and return zero. */
|
if (regno == -1)
|
if (regno == -1)
|
{
|
{
|
store_regs (tid, regno);
|
store_regs (tid, regno);
|
store_fpregs (tid, regno);
|
store_fpregs (tid, regno);
|
return;
|
return;
|
}
|
}
|
|
|
if (getregs_supplies (regno))
|
if (getregs_supplies (regno))
|
{
|
{
|
store_regs (tid, regno);
|
store_regs (tid, regno);
|
return;
|
return;
|
}
|
}
|
|
|
if (getfpregs_supplies (regno))
|
if (getfpregs_supplies (regno))
|
{
|
{
|
store_fpregs (tid, regno);
|
store_fpregs (tid, regno);
|
return;
|
return;
|
}
|
}
|
|
|
internal_error (__FILE__, __LINE__,
|
internal_error (__FILE__, __LINE__,
|
"Got request to store bad register number %d.", regno);
|
"Got request to store bad register number %d.", regno);
|
}
|
}
|
|
|
/* Interpreting register set info found in core files. */
|
/* Interpreting register set info found in core files. */
|
|
|
/* Provide registers to GDB from a core file.
|
/* Provide registers to GDB from a core file.
|
|
|
(We can't use the generic version of this function in
|
(We can't use the generic version of this function in
|
core-regset.c, because we need to use elf_gregset_t instead of
|
core-regset.c, because we need to use elf_gregset_t instead of
|
gregset_t.)
|
gregset_t.)
|
|
|
CORE_REG_SECT points to an array of bytes, which are the contents
|
CORE_REG_SECT points to an array of bytes, which are the contents
|
of a `note' from a core file which BFD thinks might contain
|
of a `note' from a core file which BFD thinks might contain
|
register contents. CORE_REG_SIZE is its size.
|
register contents. CORE_REG_SIZE is its size.
|
|
|
WHICH says which register set corelow suspects this is:
|
WHICH says which register set corelow suspects this is:
|
0 --- the general-purpose register set, in elf_gregset_t format
|
0 --- the general-purpose register set, in elf_gregset_t format
|
2 --- the floating-point register set, in elf_fpregset_t format
|
2 --- the floating-point register set, in elf_fpregset_t format
|
|
|
REG_ADDR isn't used on GNU/Linux. */
|
REG_ADDR isn't used on GNU/Linux. */
|
|
|
static void
|
static void
|
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
|
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
|
int which, CORE_ADDR reg_addr)
|
int which, CORE_ADDR reg_addr)
|
{
|
{
|
elf_gregset_t gregset;
|
elf_gregset_t gregset;
|
elf_fpregset_t fpregset;
|
elf_fpregset_t fpregset;
|
|
|
switch (which)
|
switch (which)
|
{
|
{
|
case 0:
|
case 0:
|
if (core_reg_size != sizeof (gregset))
|
if (core_reg_size != sizeof (gregset))
|
warning ("Wrong size gregset in core file.");
|
warning ("Wrong size gregset in core file.");
|
else
|
else
|
{
|
{
|
memcpy (&gregset, core_reg_sect, sizeof (gregset));
|
memcpy (&gregset, core_reg_sect, sizeof (gregset));
|
supply_gregset (&gregset);
|
supply_gregset (&gregset);
|
}
|
}
|
break;
|
break;
|
|
|
case 2:
|
case 2:
|
if (core_reg_size != sizeof (fpregset))
|
if (core_reg_size != sizeof (fpregset))
|
warning ("Wrong size fpregset in core file.");
|
warning ("Wrong size fpregset in core file.");
|
else
|
else
|
{
|
{
|
memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
|
memcpy (&fpregset, core_reg_sect, sizeof (fpregset));
|
supply_fpregset (&fpregset);
|
supply_fpregset (&fpregset);
|
}
|
}
|
break;
|
break;
|
|
|
default:
|
default:
|
/* We've covered all the kinds of registers we know about here,
|
/* We've covered all the kinds of registers we know about here,
|
so this must be something we wouldn't know what to do with
|
so this must be something we wouldn't know what to do with
|
anyway. Just ignore it. */
|
anyway. Just ignore it. */
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
|
|
int
|
int
|
kernel_u_size (void)
|
kernel_u_size (void)
|
{
|
{
|
return (sizeof (struct user));
|
return (sizeof (struct user));
|
}
|
}
|
|
|
/* Check whether insn1 and insn2 are parts of a signal trampoline. */
|
/* Check whether insn1 and insn2 are parts of a signal trampoline. */
|
|
|
#define IS_SIGTRAMP(insn1, insn2) \
|
#define IS_SIGTRAMP(insn1, insn2) \
|
(/* addaw #20,sp; moveq #119,d0; trap #0 */ \
|
(/* addaw #20,sp; moveq #119,d0; trap #0 */ \
|
(insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
|
(insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
|
/* moveq #119,d0; trap #0 */ \
|
/* moveq #119,d0; trap #0 */ \
|
|| insn1 == 0x70774e40)
|
|| insn1 == 0x70774e40)
|
|
|
#define IS_RT_SIGTRAMP(insn1, insn2) \
|
#define IS_RT_SIGTRAMP(insn1, insn2) \
|
(/* movel #173,d0; trap #0 */ \
|
(/* movel #173,d0; trap #0 */ \
|
(insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
|
(insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
|
/* moveq #82,d0; notb d0; trap #0 */ \
|
/* moveq #82,d0; notb d0; trap #0 */ \
|
|| (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
|
|| (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
|
|
|
/* Return non-zero if PC points into the signal trampoline. For the sake
|
/* Return non-zero if PC points into the signal trampoline. For the sake
|
of m68k_linux_frame_saved_pc we also distinguish between non-RT and RT
|
of m68k_linux_frame_saved_pc we also distinguish between non-RT and RT
|
signal trampolines. */
|
signal trampolines. */
|
|
|
int
|
int
|
m68k_linux_in_sigtramp (CORE_ADDR pc)
|
m68k_linux_in_sigtramp (CORE_ADDR pc)
|
{
|
{
|
CORE_ADDR sp;
|
CORE_ADDR sp;
|
char buf[12];
|
char buf[12];
|
unsigned long insn0, insn1, insn2;
|
unsigned long insn0, insn1, insn2;
|
|
|
if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
|
if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
|
return 0;
|
return 0;
|
insn1 = extract_unsigned_integer (buf + 4, 4);
|
insn1 = extract_unsigned_integer (buf + 4, 4);
|
insn2 = extract_unsigned_integer (buf + 8, 4);
|
insn2 = extract_unsigned_integer (buf + 8, 4);
|
if (IS_SIGTRAMP (insn1, insn2))
|
if (IS_SIGTRAMP (insn1, insn2))
|
return 1;
|
return 1;
|
if (IS_RT_SIGTRAMP (insn1, insn2))
|
if (IS_RT_SIGTRAMP (insn1, insn2))
|
return 2;
|
return 2;
|
|
|
insn0 = extract_unsigned_integer (buf, 4);
|
insn0 = extract_unsigned_integer (buf, 4);
|
if (IS_SIGTRAMP (insn0, insn1))
|
if (IS_SIGTRAMP (insn0, insn1))
|
return 1;
|
return 1;
|
if (IS_RT_SIGTRAMP (insn0, insn1))
|
if (IS_RT_SIGTRAMP (insn0, insn1))
|
return 2;
|
return 2;
|
|
|
insn0 = (insn0 << 16) | (insn1 >> 16);
|
insn0 = (insn0 << 16) | (insn1 >> 16);
|
insn1 = (insn1 << 16) | (insn2 >> 16);
|
insn1 = (insn1 << 16) | (insn2 >> 16);
|
if (IS_SIGTRAMP (insn0, insn1))
|
if (IS_SIGTRAMP (insn0, insn1))
|
return 1;
|
return 1;
|
if (IS_RT_SIGTRAMP (insn0, insn1))
|
if (IS_RT_SIGTRAMP (insn0, insn1))
|
return 2;
|
return 2;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
|
/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
|
#define SIGCONTEXT_PC_OFFSET 26
|
#define SIGCONTEXT_PC_OFFSET 26
|
|
|
/* Offset to saved PC in ucontext, from <asm/ucontext.h>. */
|
/* Offset to saved PC in ucontext, from <asm/ucontext.h>. */
|
#define UCONTEXT_PC_OFFSET 88
|
#define UCONTEXT_PC_OFFSET 88
|
|
|
/* Get saved user PC for sigtramp from sigcontext or ucontext. */
|
/* Get saved user PC for sigtramp from sigcontext or ucontext. */
|
|
|
static CORE_ADDR
|
static CORE_ADDR
|
m68k_linux_sigtramp_saved_pc (struct frame_info *frame)
|
m68k_linux_sigtramp_saved_pc (struct frame_info *frame)
|
{
|
{
|
CORE_ADDR sigcontext_addr;
|
CORE_ADDR sigcontext_addr;
|
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
|
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
|
int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
|
int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
|
int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
|
int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
|
|
|
/* Get sigcontext address, it is the third parameter on the stack. */
|
/* Get sigcontext address, it is the third parameter on the stack. */
|
if (frame->next)
|
if (frame->next)
|
sigcontext_addr = read_memory_integer (FRAME_ARGS_ADDRESS (frame->next)
|
sigcontext_addr = read_memory_integer (FRAME_ARGS_ADDRESS (frame->next)
|
+ FRAME_ARGS_SKIP
|
+ FRAME_ARGS_SKIP
|
+ sigcontext_offs,
|
+ sigcontext_offs,
|
ptrbytes);
|
ptrbytes);
|
else
|
else
|
sigcontext_addr = read_memory_integer (read_register (SP_REGNUM)
|
sigcontext_addr = read_memory_integer (read_register (SP_REGNUM)
|
+ sigcontext_offs,
|
+ sigcontext_offs,
|
ptrbytes);
|
ptrbytes);
|
|
|
/* Don't cause a memory_error when accessing sigcontext in case the
|
/* Don't cause a memory_error when accessing sigcontext in case the
|
stack layout has changed or the stack is corrupt. */
|
stack layout has changed or the stack is corrupt. */
|
if (m68k_linux_in_sigtramp (frame->pc) == 2)
|
if (m68k_linux_in_sigtramp (frame->pc) == 2)
|
target_read_memory (sigcontext_addr + UCONTEXT_PC_OFFSET, buf, ptrbytes);
|
target_read_memory (sigcontext_addr + UCONTEXT_PC_OFFSET, buf, ptrbytes);
|
else
|
else
|
target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
|
target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
|
return extract_unsigned_integer (buf, ptrbytes);
|
return extract_unsigned_integer (buf, ptrbytes);
|
}
|
}
|
|
|
/* Return the saved program counter for FRAME. */
|
/* Return the saved program counter for FRAME. */
|
|
|
CORE_ADDR
|
CORE_ADDR
|
m68k_linux_frame_saved_pc (struct frame_info *frame)
|
m68k_linux_frame_saved_pc (struct frame_info *frame)
|
{
|
{
|
if (frame->signal_handler_caller)
|
if (frame->signal_handler_caller)
|
return m68k_linux_sigtramp_saved_pc (frame);
|
return m68k_linux_sigtramp_saved_pc (frame);
|
|
|
return read_memory_integer (frame->frame + 4, 4);
|
return read_memory_integer (frame->frame + 4, 4);
|
}
|
}
|
|
|
/* Register that we are able to handle GNU/Linux ELF core file
|
/* Register that we are able to handle GNU/Linux ELF core file
|
formats. */
|
formats. */
|
|
|
static struct core_fns linux_elf_core_fns =
|
static struct core_fns linux_elf_core_fns =
|
{
|
{
|
bfd_target_elf_flavour, /* core_flavour */
|
bfd_target_elf_flavour, /* core_flavour */
|
default_check_format, /* check_format */
|
default_check_format, /* check_format */
|
default_core_sniffer, /* core_sniffer */
|
default_core_sniffer, /* core_sniffer */
|
fetch_core_registers, /* core_read_registers */
|
fetch_core_registers, /* core_read_registers */
|
NULL /* next */
|
NULL /* next */
|
};
|
};
|
|
|
void
|
void
|
_initialize_m68k_linux_nat (void)
|
_initialize_m68k_linux_nat (void)
|
{
|
{
|
add_core_fns (&linux_elf_core_fns);
|
add_core_fns (&linux_elf_core_fns);
|
}
|
}
|
|
|
