Commit | Line | Data |
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eb826dc6 MF |
1 | /* GNU/Linux/BFIN specific low level interface, for the remote server for GDB. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2005-2020 Free Software Foundation, Inc. |
eb826dc6 MF |
4 | |
5 | Contributed by Analog Devices, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
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. | |
13 | ||
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. | |
18 | ||
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/>. */ | |
21 | ||
22 | #include "server.h" | |
23 | #include "linux-low.h" | |
eb826dc6 MF |
24 | #include <asm/ptrace.h> |
25 | ||
ef0478f6 TBA |
26 | /* Linux target op definitions for the BFIN architecture. */ |
27 | ||
28 | class bfin_target : public linux_process_target | |
29 | { | |
30 | public: | |
31 | ||
aa8d21c9 TBA |
32 | const regs_info *get_regs_info () override; |
33 | ||
797bcff5 TBA |
34 | protected: |
35 | ||
36 | void low_arch_setup () override; | |
daca57a7 TBA |
37 | |
38 | bool low_cannot_fetch_register (int regno) override; | |
39 | ||
40 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
41 | |
42 | bool low_supports_breakpoints () override; | |
43 | ||
44 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
45 | ||
46 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
ef0478f6 TBA |
47 | }; |
48 | ||
49 | /* The singleton target ops object. */ | |
50 | ||
51 | static bfin_target the_bfin_target; | |
52 | ||
bf9ae9d8 TBA |
53 | bool |
54 | bfin_target::low_supports_breakpoints () | |
55 | { | |
56 | return true; | |
57 | } | |
58 | ||
59 | CORE_ADDR | |
60 | bfin_target::low_get_pc (regcache *regcache) | |
61 | { | |
62 | return linux_get_pc_32bit (regcache); | |
63 | } | |
64 | ||
65 | void | |
66 | bfin_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
67 | { | |
68 | linux_set_pc_32bit (regcache, pc); | |
69 | } | |
70 | ||
eb826dc6 MF |
71 | /* Defined in auto-generated file reg-bfin.c. */ |
72 | void init_registers_bfin (void); | |
3aee8918 | 73 | extern const struct target_desc *tdesc_bfin; |
eb826dc6 MF |
74 | |
75 | static int bfin_regmap[] = | |
76 | { | |
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, | |
85 | PT_PC, | |
86 | }; | |
87 | ||
88 | #define bfin_num_regs ARRAY_SIZE (bfin_regmap) | |
89 | ||
daca57a7 TBA |
90 | bool |
91 | bfin_target::low_cannot_store_register (int regno) | |
eb826dc6 MF |
92 | { |
93 | return (regno >= bfin_num_regs); | |
94 | } | |
95 | ||
daca57a7 TBA |
96 | bool |
97 | bfin_target::low_cannot_fetch_register (int regno) | |
eb826dc6 MF |
98 | { |
99 | return (regno >= bfin_num_regs); | |
100 | } | |
101 | ||
eb826dc6 | 102 | #define bfin_breakpoint_len 2 |
dd373349 AT |
103 | static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00}; |
104 | ||
105 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ | |
106 | ||
107 | static const gdb_byte * | |
108 | bfin_sw_breakpoint_from_kind (int kind, int *size) | |
109 | { | |
110 | *size = bfin_breakpoint_len; | |
111 | return bfin_breakpoint; | |
112 | } | |
eb826dc6 MF |
113 | |
114 | static int | |
115 | bfin_breakpoint_at (CORE_ADDR where) | |
116 | { | |
117 | unsigned char insn[bfin_breakpoint_len]; | |
118 | ||
119 | read_inferior_memory(where, insn, bfin_breakpoint_len); | |
120 | if (insn[0] == bfin_breakpoint[0] | |
121 | && insn[1] == bfin_breakpoint[1]) | |
122 | return 1; | |
123 | ||
124 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
125 | one. */ | |
126 | return 0; | |
127 | } | |
128 | ||
797bcff5 TBA |
129 | void |
130 | bfin_target::low_arch_setup () | |
3aee8918 PA |
131 | { |
132 | current_process ()->tdesc = tdesc_bfin; | |
133 | } | |
134 | ||
7d00775e AT |
135 | /* Support for hardware single step. */ |
136 | ||
137 | static int | |
138 | bfin_supports_hardware_single_step (void) | |
139 | { | |
140 | return 1; | |
141 | } | |
142 | ||
3aee8918 PA |
143 | static struct usrregs_info bfin_usrregs_info = |
144 | { | |
145 | bfin_num_regs, | |
146 | bfin_regmap, | |
147 | }; | |
148 | ||
aa8d21c9 | 149 | static struct regs_info myregs_info = |
3aee8918 PA |
150 | { |
151 | NULL, /* regset_bitmap */ | |
152 | &bfin_usrregs_info, | |
153 | }; | |
154 | ||
aa8d21c9 TBA |
155 | const regs_info * |
156 | bfin_target::get_regs_info () | |
3aee8918 | 157 | { |
aa8d21c9 | 158 | return &myregs_info; |
3aee8918 PA |
159 | } |
160 | ||
eb826dc6 | 161 | struct linux_target_ops the_low_target = { |
dd373349 | 162 | bfin_sw_breakpoint_from_kind, |
fa5308bd | 163 | NULL, /* get_next_pcs */ |
eb826dc6 MF |
164 | 2, |
165 | bfin_breakpoint_at, | |
7d00775e AT |
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 */ | |
04ec7890 | 175 | NULL, /* delete_process */ |
7d00775e | 176 | NULL, /* new_thread */ |
466eecee | 177 | NULL, /* delete_thread */ |
7d00775e AT |
178 | NULL, /* new_fork */ |
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 */ | |
184 | NULL, /* emit_ops */ | |
185 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
186 | NULL, /* supports_range_stepping */ | |
7d00775e | 187 | bfin_supports_hardware_single_step, |
eb826dc6 | 188 | }; |
3aee8918 | 189 | |
ef0478f6 TBA |
190 | /* The linux target ops object. */ |
191 | ||
192 | linux_process_target *the_linux_target = &the_bfin_target; | |
3aee8918 PA |
193 | |
194 | void | |
195 | initialize_low_arch (void) | |
196 | { | |
197 | init_registers_bfin (); | |
198 | } |