190 lines
4.5 KiB
C
190 lines
4.5 KiB
C
/* GNU/Linux/SH specific low level interface, for the remote server for GDB.
|
|
Copyright (C) 1995-2018 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "server.h"
|
|
#include "linux-low.h"
|
|
|
|
/* Defined in auto-generated file reg-sh.c. */
|
|
void init_registers_sh (void);
|
|
extern const struct target_desc *tdesc_sh;
|
|
|
|
#ifdef HAVE_SYS_REG_H
|
|
#include <sys/reg.h>
|
|
#endif
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
#define sh_num_regs 41
|
|
|
|
/* Currently, don't check/send MQ. */
|
|
static int sh_regmap[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 48, 52, 56, 60,
|
|
|
|
REG_PC*4, REG_PR*4, REG_GBR*4, -1,
|
|
REG_MACH*4, REG_MACL*4, REG_SR*4,
|
|
REG_FPUL*4, REG_FPSCR*4,
|
|
|
|
REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12,
|
|
REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28,
|
|
REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44,
|
|
REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60,
|
|
};
|
|
|
|
static int
|
|
sh_cannot_store_register (int regno)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
sh_cannot_fetch_register (int regno)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Correct in either endianness, obviously. */
|
|
static const unsigned short sh_breakpoint = 0xc3c3;
|
|
#define sh_breakpoint_len 2
|
|
|
|
/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
|
|
|
|
static const gdb_byte *
|
|
sh_sw_breakpoint_from_kind (int kind, int *size)
|
|
{
|
|
*size = sh_breakpoint_len;
|
|
return (const gdb_byte *) &sh_breakpoint;
|
|
}
|
|
|
|
static int
|
|
sh_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned short insn;
|
|
|
|
(*the_target->read_memory) (where, (unsigned char *) &insn, 2);
|
|
if (insn == sh_breakpoint)
|
|
return 1;
|
|
|
|
/* If necessary, recognize more trap instructions here. GDB only uses the
|
|
one. */
|
|
return 0;
|
|
}
|
|
|
|
/* Support for hardware single step. */
|
|
|
|
static int
|
|
sh_supports_hardware_single_step (void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* Provide only a fill function for the general register set. ps_lgetregs
|
|
will use this for NPTL support. */
|
|
|
|
static void sh_fill_gregset (struct regcache *regcache, void *buf)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 23; i++)
|
|
if (sh_regmap[i] != -1)
|
|
collect_register (regcache, i, (char *) buf + sh_regmap[i]);
|
|
}
|
|
|
|
static struct regset_info sh_regsets[] = {
|
|
{ 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
|
|
NULL_REGSET
|
|
};
|
|
|
|
static struct regsets_info sh_regsets_info =
|
|
{
|
|
sh_regsets, /* regsets */
|
|
0, /* num_regsets */
|
|
NULL, /* disabled_regsets */
|
|
};
|
|
|
|
static struct usrregs_info sh_usrregs_info =
|
|
{
|
|
sh_num_regs,
|
|
sh_regmap,
|
|
};
|
|
|
|
static struct regs_info regs_info =
|
|
{
|
|
NULL, /* regset_bitmap */
|
|
&sh_usrregs_info,
|
|
&sh_regsets_info
|
|
};
|
|
|
|
static const struct regs_info *
|
|
sh_regs_info (void)
|
|
{
|
|
return ®s_info;
|
|
}
|
|
|
|
static void
|
|
sh_arch_setup (void)
|
|
{
|
|
current_process ()->tdesc = tdesc_sh;
|
|
}
|
|
|
|
struct linux_target_ops the_low_target = {
|
|
sh_arch_setup,
|
|
sh_regs_info,
|
|
sh_cannot_fetch_register,
|
|
sh_cannot_store_register,
|
|
NULL, /* fetch_register */
|
|
linux_get_pc_32bit,
|
|
linux_set_pc_32bit,
|
|
NULL, /* breakpoint_kind_from_pc */
|
|
sh_sw_breakpoint_from_kind,
|
|
NULL,
|
|
0,
|
|
sh_breakpoint_at,
|
|
NULL, /* supports_z_point_type */
|
|
NULL, /* insert_point */
|
|
NULL, /* remove_point */
|
|
NULL, /* stopped_by_watchpoint */
|
|
NULL, /* stopped_data_address */
|
|
NULL, /* collect_ptrace_register */
|
|
NULL, /* supply_ptrace_register */
|
|
NULL, /* siginfo_fixup */
|
|
NULL, /* new_process */
|
|
NULL, /* delete_process */
|
|
NULL, /* new_thread */
|
|
NULL, /* delete_thread */
|
|
NULL, /* new_fork */
|
|
NULL, /* prepare_to_resume */
|
|
NULL, /* process_qsupported */
|
|
NULL, /* supports_tracepoints */
|
|
NULL, /* get_thread_area */
|
|
NULL, /* install_fast_tracepoint_jump_pad */
|
|
NULL, /* emit_ops */
|
|
NULL, /* get_min_fast_tracepoint_insn_len */
|
|
NULL, /* supports_range_stepping */
|
|
NULL, /* breakpoint_kind_from_current_state */
|
|
sh_supports_hardware_single_step,
|
|
};
|
|
|
|
void
|
|
initialize_low_arch (void)
|
|
{
|
|
init_registers_sh ();
|
|
|
|
initialize_regsets_info (&sh_regsets_info);
|
|
}
|