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
;
36 void low_arch_setup () override
;
38 bool low_cannot_fetch_register (int regno
) override
;
40 bool low_cannot_store_register (int regno
) override
;
42 bool low_supports_breakpoints () override
;
44 CORE_ADDR
low_get_pc (regcache
*regcache
) override
;
46 void low_set_pc (regcache
*regcache
, CORE_ADDR newpc
) override
;
49 /* The singleton target ops object. */
51 static bfin_target the_bfin_target
;
54 bfin_target::low_supports_breakpoints ()
60 bfin_target::low_get_pc (regcache
*regcache
)
62 return linux_get_pc_32bit (regcache
);
66 bfin_target::low_set_pc (regcache
*regcache
, CORE_ADDR pc
)
68 linux_set_pc_32bit (regcache
, pc
);
71 /* Defined in auto-generated file reg-bfin.c. */
72 void init_registers_bfin (void);
73 extern const struct target_desc
*tdesc_bfin
;
75 static int bfin_regmap
[] =
77 PT_R0
, PT_R1
, PT_R2
, PT_R3
, PT_R4
, PT_R5
, PT_R6
, PT_R7
,
78 PT_P0
, PT_P1
, PT_P2
, PT_P3
, PT_P4
, PT_P5
, PT_USP
, PT_FP
,
79 PT_I0
, PT_I1
, PT_I2
, PT_I3
, PT_M0
, PT_M1
, PT_M2
, PT_M3
,
80 PT_B0
, PT_B1
, PT_B2
, PT_B3
, PT_L0
, PT_L1
, PT_L2
, PT_L3
,
81 PT_A0X
, PT_A0W
, PT_A1X
, PT_A1W
, PT_ASTAT
, PT_RETS
,
82 PT_LC0
, PT_LT0
, PT_LB0
, PT_LC1
, PT_LT1
, PT_LB1
,
83 -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
84 -1 /* PT_USP */, PT_SEQSTAT
, PT_SYSCFG
, PT_PC
, PT_RETX
, PT_RETN
, PT_RETE
,
88 #define bfin_num_regs ARRAY_SIZE (bfin_regmap)
91 bfin_target::low_cannot_store_register (int regno
)
93 return (regno
>= bfin_num_regs
);
97 bfin_target::low_cannot_fetch_register (int regno
)
99 return (regno
>= bfin_num_regs
);
102 #define bfin_breakpoint_len 2
103 static const gdb_byte bfin_breakpoint
[bfin_breakpoint_len
] = {0xa1, 0x00};
105 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
107 static const gdb_byte
*
108 bfin_sw_breakpoint_from_kind (int kind
, int *size
)
110 *size
= bfin_breakpoint_len
;
111 return bfin_breakpoint
;
115 bfin_breakpoint_at (CORE_ADDR where
)
117 unsigned char insn
[bfin_breakpoint_len
];
119 read_inferior_memory(where
, insn
, bfin_breakpoint_len
);
120 if (insn
[0] == bfin_breakpoint
[0]
121 && insn
[1] == bfin_breakpoint
[1])
124 /* If necessary, recognize more trap instructions here. GDB only uses the
130 bfin_target::low_arch_setup ()
132 current_process ()->tdesc
= tdesc_bfin
;
135 /* Support for hardware single step. */
138 bfin_supports_hardware_single_step (void)
143 static struct usrregs_info bfin_usrregs_info
=
149 static struct regs_info myregs_info
=
151 NULL
, /* regset_bitmap */
156 bfin_target::get_regs_info ()
161 struct linux_target_ops the_low_target
= {
162 bfin_sw_breakpoint_from_kind
,
163 NULL
, /* get_next_pcs */
166 NULL
, /* supports_z_point_type */
167 NULL
, /* insert_point */
168 NULL
, /* remove_point */
169 NULL
, /* stopped_by_watchpoint */
170 NULL
, /* stopped_data_address */
171 NULL
, /* collect_ptrace_register */
172 NULL
, /* supply_ptrace_register */
173 NULL
, /* siginfo_fixup */
174 NULL
, /* new_process */
175 NULL
, /* delete_process */
176 NULL
, /* new_thread */
177 NULL
, /* delete_thread */
179 NULL
, /* prepare_to_resume */
180 NULL
, /* process_qsupported */
181 NULL
, /* supports_tracepoints */
182 NULL
, /* get_thread_area */
183 NULL
, /* install_fast_tracepoint_jump_pad */
185 NULL
, /* get_min_fast_tracepoint_insn_len */
186 NULL
, /* supports_range_stepping */
187 bfin_supports_hardware_single_step
,
190 /* The linux target ops object. */
192 linux_process_target
*the_linux_target
= &the_bfin_target
;
195 initialize_low_arch (void)
197 init_registers_bfin ();