1*b725ae77Skettenis /* GNU/Linux/SH specific low level interface, for the remote server for GDB.
2*b725ae77Skettenis Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003
3*b725ae77Skettenis Free Software Foundation, Inc.
4*b725ae77Skettenis
5*b725ae77Skettenis This file is part of GDB.
6*b725ae77Skettenis
7*b725ae77Skettenis This program is free software; you can redistribute it and/or modify
8*b725ae77Skettenis it under the terms of the GNU General Public License as published by
9*b725ae77Skettenis the Free Software Foundation; either version 2 of the License, or
10*b725ae77Skettenis (at your option) any later version.
11*b725ae77Skettenis
12*b725ae77Skettenis This program is distributed in the hope that it will be useful,
13*b725ae77Skettenis but WITHOUT ANY WARRANTY; without even the implied warranty of
14*b725ae77Skettenis MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15*b725ae77Skettenis GNU General Public License for more details.
16*b725ae77Skettenis
17*b725ae77Skettenis You should have received a copy of the GNU General Public License
18*b725ae77Skettenis along with this program; if not, write to the Free Software
19*b725ae77Skettenis Foundation, Inc., 59 Temple Place - Suite 330,
20*b725ae77Skettenis Boston, MA 02111-1307, USA. */
21*b725ae77Skettenis
22*b725ae77Skettenis #include "server.h"
23*b725ae77Skettenis #include "linux-low.h"
24*b725ae77Skettenis
25*b725ae77Skettenis #ifdef HAVE_SYS_REG_H
26*b725ae77Skettenis #include <sys/reg.h>
27*b725ae77Skettenis #endif
28*b725ae77Skettenis
29*b725ae77Skettenis #include <asm/ptrace.h>
30*b725ae77Skettenis
31*b725ae77Skettenis #define sh_num_regs 41
32*b725ae77Skettenis
33*b725ae77Skettenis /* Currently, don't check/send MQ. */
34*b725ae77Skettenis static int sh_regmap[] = {
35*b725ae77Skettenis 0, 4, 8, 12, 16, 20, 24, 28,
36*b725ae77Skettenis 32, 36, 40, 44, 48, 52, 56, 60,
37*b725ae77Skettenis
38*b725ae77Skettenis REG_PC*4, REG_PR*4, REG_GBR*4, -1,
39*b725ae77Skettenis REG_MACH*4, REG_MACL*4, REG_SR*4,
40*b725ae77Skettenis REG_FPUL*4, REG_FPSCR*4,
41*b725ae77Skettenis
42*b725ae77Skettenis REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12,
43*b725ae77Skettenis REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28,
44*b725ae77Skettenis REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44,
45*b725ae77Skettenis REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60,
46*b725ae77Skettenis };
47*b725ae77Skettenis
48*b725ae77Skettenis static int
sh_cannot_store_register(int regno)49*b725ae77Skettenis sh_cannot_store_register (int regno)
50*b725ae77Skettenis {
51*b725ae77Skettenis return 0;
52*b725ae77Skettenis }
53*b725ae77Skettenis
54*b725ae77Skettenis static int
sh_cannot_fetch_register(int regno)55*b725ae77Skettenis sh_cannot_fetch_register (int regno)
56*b725ae77Skettenis {
57*b725ae77Skettenis return 0;
58*b725ae77Skettenis }
59*b725ae77Skettenis
60*b725ae77Skettenis static CORE_ADDR
sh_get_pc()61*b725ae77Skettenis sh_get_pc ()
62*b725ae77Skettenis {
63*b725ae77Skettenis unsigned long pc;
64*b725ae77Skettenis collect_register_by_name ("pc", &pc);
65*b725ae77Skettenis return pc;
66*b725ae77Skettenis }
67*b725ae77Skettenis
68*b725ae77Skettenis static void
sh_set_pc(CORE_ADDR pc)69*b725ae77Skettenis sh_set_pc (CORE_ADDR pc)
70*b725ae77Skettenis {
71*b725ae77Skettenis unsigned long newpc = pc;
72*b725ae77Skettenis supply_register_by_name ("pc", &newpc);
73*b725ae77Skettenis }
74*b725ae77Skettenis
75*b725ae77Skettenis /* Correct in either endianness, obviously. */
76*b725ae77Skettenis static const unsigned short sh_breakpoint = 0xc3c3;
77*b725ae77Skettenis #define sh_breakpoint_len 2
78*b725ae77Skettenis
79*b725ae77Skettenis static int
sh_breakpoint_at(CORE_ADDR where)80*b725ae77Skettenis sh_breakpoint_at (CORE_ADDR where)
81*b725ae77Skettenis {
82*b725ae77Skettenis unsigned short insn;
83*b725ae77Skettenis
84*b725ae77Skettenis (*the_target->read_memory) (where, (char *) &insn, 2);
85*b725ae77Skettenis if (insn == sh_breakpoint)
86*b725ae77Skettenis return 1;
87*b725ae77Skettenis
88*b725ae77Skettenis /* If necessary, recognize more trap instructions here. GDB only uses the
89*b725ae77Skettenis one. */
90*b725ae77Skettenis return 0;
91*b725ae77Skettenis }
92*b725ae77Skettenis
93*b725ae77Skettenis struct linux_target_ops the_low_target = {
94*b725ae77Skettenis sh_num_regs,
95*b725ae77Skettenis sh_regmap,
96*b725ae77Skettenis sh_cannot_fetch_register,
97*b725ae77Skettenis sh_cannot_store_register,
98*b725ae77Skettenis sh_get_pc,
99*b725ae77Skettenis sh_set_pc,
100*b725ae77Skettenis (const char *) &sh_breakpoint,
101*b725ae77Skettenis sh_breakpoint_len,
102*b725ae77Skettenis NULL,
103*b725ae77Skettenis 0,
104*b725ae77Skettenis sh_breakpoint_at,
105*b725ae77Skettenis };
106