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linux-m32r-low.c
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1 /* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
2  Copyright (C) 2005-2015 Free Software Foundation, Inc.
3 
4  This file is part of GDB.
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 3 of the License, or
9  (at your option) any later version.
10 
11  This program is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU General Public License for more details.
15 
16  You should have received a copy of the GNU General Public License
17  along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 
19 #include "server.h"
20 #include "linux-low.h"
21 
22 #ifdef HAVE_SYS_REG_H
23 #include <sys/reg.h>
24 #endif
25 
26 /* Defined in auto-generated file reg-m32r.c. */
27 void init_registers_m32r (void);
28 extern const struct target_desc *tdesc_m32r;
29 
30 #define m32r_num_regs 25
31 
32 static int m32r_regmap[] = {
33 #ifdef PT_R0
34  PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
35  PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
36  PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
37 #else
38  4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
39  4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
40  4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
41 #endif
42 };
43 
44 static int
46 {
47  return (regno >= m32r_num_regs);
48 }
49 
50 static int
52 {
53  return (regno >= m32r_num_regs);
54 }
55 
56 static CORE_ADDR
58 {
59  unsigned long pc;
60  collect_register_by_name (regcache, "pc", &pc);
61  if (debug_threads)
62  debug_printf ("stop pc is %08lx\n", pc);
63  return pc;
64 }
65 
66 static void
68 {
69  unsigned long newpc = pc;
70  supply_register_by_name (regcache, "pc", &newpc);
71 }
72 
73 static const unsigned short m32r_breakpoint = 0x10f1;
74 #define m32r_breakpoint_len 2
75 
76 static int
78 {
79  unsigned short insn;
80 
81  (*the_target->read_memory) (where, (unsigned char *) &insn,
83  if (insn == m32r_breakpoint)
84  return 1;
85 
86  /* If necessary, recognize more trap instructions here. GDB only uses the
87  one. */
88  return 0;
89 }
90 
91 static void
93 {
95 }
96 
97 static struct usrregs_info m32r_usrregs_info =
98  {
100  m32r_regmap,
101  };
102 
103 static struct regs_info regs_info =
104  {
105  NULL, /* regset_bitmap */
107  };
108 
109 static const struct regs_info *
111 {
112  return &regs_info;
113 }
114 
115 struct linux_target_ops the_low_target = {
120  NULL, /* fetch_register */
121  m32r_get_pc,
122  m32r_set_pc,
123  (const unsigned char *) &m32r_breakpoint,
125  NULL,
126  0,
128 };
129 
130 void
132 {
134 }
int debug_threads
Definition: debug.c:24
bfd_vma CORE_ADDR
Definition: common-types.h:41
void supply_register_by_name(struct regcache *regcache, const char *name, const void *buf)
Definition: regcache.c:405
static struct regs_info regs_info
#define m32r_num_regs
static void m32r_set_pc(struct regcache *regcache, CORE_ADDR pc)
static int m32r_cannot_fetch_register(int regno)
struct target_ops * the_target
Definition: target.c:24
const struct target_desc * tdesc
Definition: inferiors.h:69
void collect_register_by_name(struct regcache *regcache, const char *name, void *buf)
Definition: regcache.c:430
void init_registers_m32r(void)
static const unsigned short m32r_breakpoint
static struct usrregs_info m32r_usrregs_info
#define m32r_breakpoint_len
struct process_info * current_process(void)
Definition: inferiors.c:356
static const struct regs_info * m32r_regs_info(void)
static int m32r_regmap[]
const struct target_desc * tdesc_m32r
int(* read_memory)(CORE_ADDR memaddr, unsigned char *myaddr, int len)
Definition: target.h:160
void initialize_low_arch(void)
static int m32r_cannot_store_register(int regno)
void debug_printf(const char *fmt,...)
Definition: common-debug.c:30
static void m32r_arch_setup(void)
static int m32r_breakpoint_at(CORE_ADDR where)
static CORE_ADDR m32r_get_pc(struct regcache *regcache)