168 lines
3.8 KiB
C
168 lines
3.8 KiB
C
/* GNU/Linux/m68k specific low level interface, for the remote server for GDB.
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Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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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,
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Boston, MA 02111-1307, USA. */
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#include "server.h"
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#include "linux-low.h"
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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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#define m68k_num_regs 29
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#define m68k_num_gregs 18
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/* This table must line up with REGISTER_NAMES in tm-m68k.h */
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static int m68k_regmap[] =
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{
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#ifdef PT_D0
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PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4,
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PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4,
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PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4,
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PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4,
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PT_SR * 4, PT_PC * 4,
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#else
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14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4,
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7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4,
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17 * 4, 18 * 4,
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#endif
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#ifdef PT_FP0
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PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4,
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PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4,
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PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4
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#else
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21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4,
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39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4
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#endif
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};
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static int
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m68k_cannot_store_register (int regno)
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{
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return (regno >= m68k_num_regs);
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}
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static int
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m68k_cannot_fetch_register (int regno)
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{
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return (regno >= m68k_num_regs);
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}
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#ifdef HAVE_LINUX_REGSETS
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#include <sys/procfs.h>
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#include <sys/ptrace.h>
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static void
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m68k_fill_gregset (void *buf)
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{
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int i;
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for (i = 0; i < m68k_num_gregs; i++)
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collect_register (i, (char *) buf + m68k_regmap[i]);
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}
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static void
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m68k_store_gregset (const void *buf)
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{
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int i;
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for (i = 0; i < m68k_num_gregs; i++)
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supply_register (i, (const char *) buf + m68k_regmap[i]);
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}
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static void
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m68k_fill_fpregset (void *buf)
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{
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int i;
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for (i = m68k_num_gregs; i < m68k_num_regs; i++)
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collect_register (i, ((char *) buf
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+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
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}
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static void
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m68k_store_fpregset (const void *buf)
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{
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int i;
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for (i = m68k_num_gregs; i < m68k_num_regs; i++)
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supply_register (i, ((const char *) buf
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+ (m68k_regmap[i] - m68k_regmap[m68k_num_gregs])));
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}
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struct regset_info target_regsets[] = {
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{ PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
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GENERAL_REGS,
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m68k_fill_gregset, m68k_store_gregset },
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{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t),
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FP_REGS,
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m68k_fill_fpregset, m68k_store_fpregset },
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{ 0, 0, -1, -1, NULL, NULL }
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};
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#endif /* HAVE_LINUX_REGSETS */
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static const char m68k_breakpoint[] = { 0x4E, 0x4F };
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#define m68k_breakpoint_len 2
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static CORE_ADDR
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m68k_get_pc ()
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{
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unsigned long pc;
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collect_register_by_name ("pc", &pc);
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return pc;
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}
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static void
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m68k_set_pc (CORE_ADDR value)
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{
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unsigned long newpc = value;
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supply_register_by_name ("pc", &newpc);
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}
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static int
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m68k_breakpoint_at (CORE_ADDR pc)
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{
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unsigned char c[2];
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read_inferior_memory (pc, c, 2);
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if (c[0] == 0x4E && c[1] == 0x4F)
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return 1;
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return 0;
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}
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struct linux_target_ops the_low_target = {
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m68k_num_regs,
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m68k_regmap,
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m68k_cannot_fetch_register,
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m68k_cannot_store_register,
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m68k_get_pc,
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m68k_set_pc,
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m68k_breakpoint,
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m68k_breakpoint_len,
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NULL,
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2,
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m68k_breakpoint_at,
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};
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