121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
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Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007
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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 3 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, see <http://www.gnu.org/licenses/>. */
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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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#include <asm/ptrace.h>
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#define sh_num_regs 41
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/* Currently, don't check/send MQ. */
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static int sh_regmap[] = {
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0, 4, 8, 12, 16, 20, 24, 28,
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32, 36, 40, 44, 48, 52, 56, 60,
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REG_PC*4, REG_PR*4, REG_GBR*4, -1,
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REG_MACH*4, REG_MACL*4, REG_SR*4,
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REG_FPUL*4, REG_FPSCR*4,
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REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12,
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REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28,
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REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44,
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REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60,
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};
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static int
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sh_cannot_store_register (int regno)
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{
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return 0;
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}
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static int
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sh_cannot_fetch_register (int regno)
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{
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return 0;
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}
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static CORE_ADDR
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sh_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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sh_set_pc (CORE_ADDR pc)
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{
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unsigned long newpc = pc;
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supply_register_by_name ("pc", &newpc);
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}
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/* Correct in either endianness, obviously. */
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static const unsigned short sh_breakpoint = 0xc3c3;
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#define sh_breakpoint_len 2
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static int
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sh_breakpoint_at (CORE_ADDR where)
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{
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unsigned short insn;
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(*the_target->read_memory) (where, (unsigned char *) &insn, 2);
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if (insn == sh_breakpoint)
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return 1;
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/* If necessary, recognize more trap instructions here. GDB only uses the
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one. */
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return 0;
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}
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/* Provide only a fill function for the general register set. ps_lgetregs
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will use this for NPTL support. */
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static void sh_fill_gregset (void *buf)
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{
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int i;
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for (i = 0; i < 23; i++)
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if (sh_regmap[i] != -1)
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collect_register (i, (char *) buf + sh_regmap[i]);
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}
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struct regset_info target_regsets[] = {
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{ 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
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{ 0, 0, -1, -1, NULL, NULL }
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};
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struct linux_target_ops the_low_target = {
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sh_num_regs,
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sh_regmap,
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sh_cannot_fetch_register,
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sh_cannot_store_register,
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sh_get_pc,
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sh_set_pc,
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(const unsigned char *) &sh_breakpoint,
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sh_breakpoint_len,
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NULL,
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0,
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sh_breakpoint_at,
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};
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