1 /* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
3 Copyright (C) 2005-2020 Free Software Foundation, Inc.
5 Contributed by Analog Devices, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "linux-low.h"
24 #include <asm/ptrace.h>
26 /* Linux target op definitions for the BFIN architecture. */
28 class bfin_target
: public linux_process_target
32 const regs_info
*get_regs_info () override
;
34 const gdb_byte
*sw_breakpoint_from_kind (int kind
, int *size
) override
;
38 void low_arch_setup () override
;
40 bool low_cannot_fetch_register (int regno
) override
;
42 bool low_cannot_store_register (int regno
) override
;
44 bool low_supports_breakpoints () override
;
46 CORE_ADDR
low_get_pc (regcache
*regcache
) override
;
48 void low_set_pc (regcache
*regcache
, CORE_ADDR newpc
) override
;
50 int low_decr_pc_after_break () override
;
53 /* The singleton target ops object. */
55 static bfin_target the_bfin_target
;
58 bfin_target::low_supports_breakpoints ()
64 bfin_target::low_get_pc (regcache
*regcache
)
66 return linux_get_pc_32bit (regcache
);
70 bfin_target::low_set_pc (regcache
*regcache
, CORE_ADDR pc
)
72 linux_set_pc_32bit (regcache
, pc
);
76 bfin_target::low_decr_pc_after_break ()
81 /* Defined in auto-generated file reg-bfin.c. */
82 void init_registers_bfin (void);
83 extern const struct target_desc
*tdesc_bfin
;
85 static int bfin_regmap
[] =
87 PT_R0
, PT_R1
, PT_R2
, PT_R3
, PT_R4
, PT_R5
, PT_R6
, PT_R7
,
88 PT_P0
, PT_P1
, PT_P2
, PT_P3
, PT_P4
, PT_P5
, PT_USP
, PT_FP
,
89 PT_I0
, PT_I1
, PT_I2
, PT_I3
, PT_M0
, PT_M1
, PT_M2
, PT_M3
,
90 PT_B0
, PT_B1
, PT_B2
, PT_B3
, PT_L0
, PT_L1
, PT_L2
, PT_L3
,
91 PT_A0X
, PT_A0W
, PT_A1X
, PT_A1W
, PT_ASTAT
, PT_RETS
,
92 PT_LC0
, PT_LT0
, PT_LB0
, PT_LC1
, PT_LT1
, PT_LB1
,
93 -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
94 -1 /* PT_USP */, PT_SEQSTAT
, PT_SYSCFG
, PT_PC
, PT_RETX
, PT_RETN
, PT_RETE
,
98 #define bfin_num_regs ARRAY_SIZE (bfin_regmap)
101 bfin_target::low_cannot_store_register (int regno
)
103 return (regno
>= bfin_num_regs
);
107 bfin_target::low_cannot_fetch_register (int regno
)
109 return (regno
>= bfin_num_regs
);
112 #define bfin_breakpoint_len 2
113 static const gdb_byte bfin_breakpoint
[bfin_breakpoint_len
] = {0xa1, 0x00};
115 /* Implementation of target ops method "sw_breakpoint_from_kind". */
118 bfin_target::sw_breakpoint_from_kind (int kind
, int *size
)
120 *size
= bfin_breakpoint_len
;
121 return bfin_breakpoint
;
125 bfin_breakpoint_at (CORE_ADDR where
)
127 unsigned char insn
[bfin_breakpoint_len
];
129 read_inferior_memory(where
, insn
, bfin_breakpoint_len
);
130 if (insn
[0] == bfin_breakpoint
[0]
131 && insn
[1] == bfin_breakpoint
[1])
134 /* If necessary, recognize more trap instructions here. GDB only uses the
140 bfin_target::low_arch_setup ()
142 current_process ()->tdesc
= tdesc_bfin
;
145 /* Support for hardware single step. */
148 bfin_supports_hardware_single_step (void)
153 static struct usrregs_info bfin_usrregs_info
=
159 static struct regs_info myregs_info
=
161 NULL
, /* regset_bitmap */
166 bfin_target::get_regs_info ()
171 struct linux_target_ops the_low_target
= {
173 NULL
, /* supports_z_point_type */
174 NULL
, /* insert_point */
175 NULL
, /* remove_point */
176 NULL
, /* stopped_by_watchpoint */
177 NULL
, /* stopped_data_address */
178 NULL
, /* collect_ptrace_register */
179 NULL
, /* supply_ptrace_register */
180 NULL
, /* siginfo_fixup */
181 NULL
, /* new_process */
182 NULL
, /* delete_process */
183 NULL
, /* new_thread */
184 NULL
, /* delete_thread */
186 NULL
, /* prepare_to_resume */
187 NULL
, /* process_qsupported */
188 NULL
, /* supports_tracepoints */
189 NULL
, /* get_thread_area */
190 NULL
, /* install_fast_tracepoint_jump_pad */
192 NULL
, /* get_min_fast_tracepoint_insn_len */
193 NULL
, /* supports_range_stepping */
194 bfin_supports_hardware_single_step
,
197 /* The linux target ops object. */
199 linux_process_target
*the_linux_target
= &the_bfin_target
;
202 initialize_low_arch (void)
204 init_registers_bfin ();