1 /* GNU/Linux/BFIN specific low level interface, for the remote server for GDB.
3 Copyright (C) 2005-2016 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 /* Defined in auto-generated file reg-bfin.c. */
27 void init_registers_bfin (void);
28 extern const struct target_desc *tdesc_bfin;
30 static int bfin_regmap[] =
32 PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
33 PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP,
34 PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3,
35 PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3,
36 PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS,
37 PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1,
38 -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */,
39 -1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE,
43 #define bfin_num_regs ARRAY_SIZE (bfin_regmap)
46 bfin_cannot_store_register (int regno)
48 return (regno >= bfin_num_regs);
52 bfin_cannot_fetch_register (int regno)
54 return (regno >= bfin_num_regs);
58 bfin_get_pc (struct regcache *regcache)
62 collect_register_by_name (regcache, "pc", &pc);
68 bfin_set_pc (struct regcache *regcache, CORE_ADDR pc)
70 unsigned long newpc = pc;
72 supply_register_by_name (regcache, "pc", &newpc);
75 #define bfin_breakpoint_len 2
76 static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00};
78 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
80 static const gdb_byte *
81 bfin_sw_breakpoint_from_kind (int kind, int *size)
83 *size = bfin_breakpoint_len;
84 return bfin_breakpoint;
88 bfin_breakpoint_at (CORE_ADDR where)
90 unsigned char insn[bfin_breakpoint_len];
92 read_inferior_memory(where, insn, bfin_breakpoint_len);
93 if (insn[0] == bfin_breakpoint[0]
94 && insn[1] == bfin_breakpoint[1])
97 /* If necessary, recognize more trap instructions here. GDB only uses the
103 bfin_arch_setup (void)
105 current_process ()->tdesc = tdesc_bfin;
108 /* Support for hardware single step. */
111 bfin_supports_hardware_single_step (void)
116 static struct usrregs_info bfin_usrregs_info =
122 static struct regs_info regs_info =
124 NULL, /* regset_bitmap */
128 static const struct regs_info *
129 bfin_regs_info (void)
134 struct linux_target_ops the_low_target = {
137 bfin_cannot_fetch_register,
138 bfin_cannot_store_register,
139 NULL, /* fetch_register */
142 NULL, /* breakpoint_kind_from_pc */
143 bfin_sw_breakpoint_from_kind,
144 NULL, /* get_next_pcs */
147 NULL, /* supports_z_point_type */
148 NULL, /* insert_point */
149 NULL, /* remove_point */
150 NULL, /* stopped_by_watchpoint */
151 NULL, /* stopped_data_address */
152 NULL, /* collect_ptrace_register */
153 NULL, /* supply_ptrace_register */
154 NULL, /* siginfo_fixup */
155 NULL, /* new_process */
156 NULL, /* new_thread */
158 NULL, /* prepare_to_resume */
159 NULL, /* process_qsupported */
160 NULL, /* supports_tracepoints */
161 NULL, /* get_thread_area */
162 NULL, /* install_fast_tracepoint_jump_pad */
164 NULL, /* get_min_fast_tracepoint_insn_len */
165 NULL, /* supports_range_stepping */
166 NULL, /* breakpoint_kind_from_current_state */
167 bfin_supports_hardware_single_step,
172 initialize_low_arch (void)
174 init_registers_bfin ();