| /* GNU/Linux/BFIN specific low level interface, for the remote server for GDB. |
| |
| Copyright (C) 2005-2017 Free Software Foundation, Inc. |
| |
| Contributed by Analog Devices, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "server.h" |
| #include "linux-low.h" |
| #include <asm/ptrace.h> |
| |
| /* Defined in auto-generated file reg-bfin.c. */ |
| void init_registers_bfin (void); |
| extern const struct target_desc *tdesc_bfin; |
| |
| static int bfin_regmap[] = |
| { |
| PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7, |
| PT_P0, PT_P1, PT_P2, PT_P3, PT_P4, PT_P5, PT_USP, PT_FP, |
| PT_I0, PT_I1, PT_I2, PT_I3, PT_M0, PT_M1, PT_M2, PT_M3, |
| PT_B0, PT_B1, PT_B2, PT_B3, PT_L0, PT_L1, PT_L2, PT_L3, |
| PT_A0X, PT_A0W, PT_A1X, PT_A1W, PT_ASTAT, PT_RETS, |
| PT_LC0, PT_LT0, PT_LB0, PT_LC1, PT_LT1, PT_LB1, |
| -1 /* PT_CYCLES */, -1 /* PT_CYCLES2 */, |
| -1 /* PT_USP */, PT_SEQSTAT, PT_SYSCFG, PT_PC, PT_RETX, PT_RETN, PT_RETE, |
| PT_PC, |
| }; |
| |
| #define bfin_num_regs ARRAY_SIZE (bfin_regmap) |
| |
| static int |
| bfin_cannot_store_register (int regno) |
| { |
| return (regno >= bfin_num_regs); |
| } |
| |
| static int |
| bfin_cannot_fetch_register (int regno) |
| { |
| return (regno >= bfin_num_regs); |
| } |
| |
| #define bfin_breakpoint_len 2 |
| static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00}; |
| |
| /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
| |
| static const gdb_byte * |
| bfin_sw_breakpoint_from_kind (int kind, int *size) |
| { |
| *size = bfin_breakpoint_len; |
| return bfin_breakpoint; |
| } |
| |
| static int |
| bfin_breakpoint_at (CORE_ADDR where) |
| { |
| unsigned char insn[bfin_breakpoint_len]; |
| |
| read_inferior_memory(where, insn, bfin_breakpoint_len); |
| if (insn[0] == bfin_breakpoint[0] |
| && insn[1] == bfin_breakpoint[1]) |
| return 1; |
| |
| /* If necessary, recognize more trap instructions here. GDB only uses the |
| one. */ |
| return 0; |
| } |
| |
| static void |
| bfin_arch_setup (void) |
| { |
| current_process ()->tdesc = tdesc_bfin; |
| } |
| |
| /* Support for hardware single step. */ |
| |
| static int |
| bfin_supports_hardware_single_step (void) |
| { |
| return 1; |
| } |
| |
| static struct usrregs_info bfin_usrregs_info = |
| { |
| bfin_num_regs, |
| bfin_regmap, |
| }; |
| |
| static struct regs_info regs_info = |
| { |
| NULL, /* regset_bitmap */ |
| &bfin_usrregs_info, |
| }; |
| |
| static const struct regs_info * |
| bfin_regs_info (void) |
| { |
| return ®s_info; |
| } |
| |
| struct linux_target_ops the_low_target = { |
| bfin_arch_setup, |
| bfin_regs_info, |
| bfin_cannot_fetch_register, |
| bfin_cannot_store_register, |
| NULL, /* fetch_register */ |
| linux_get_pc_32bit, |
| linux_set_pc_32bit, |
| NULL, /* breakpoint_kind_from_pc */ |
| bfin_sw_breakpoint_from_kind, |
| NULL, /* get_next_pcs */ |
| 2, |
| bfin_breakpoint_at, |
| NULL, /* supports_z_point_type */ |
| NULL, /* insert_point */ |
| NULL, /* remove_point */ |
| NULL, /* stopped_by_watchpoint */ |
| NULL, /* stopped_data_address */ |
| NULL, /* collect_ptrace_register */ |
| NULL, /* supply_ptrace_register */ |
| NULL, /* siginfo_fixup */ |
| NULL, /* new_process */ |
| NULL, /* new_thread */ |
| NULL, /* new_fork */ |
| NULL, /* prepare_to_resume */ |
| NULL, /* process_qsupported */ |
| NULL, /* supports_tracepoints */ |
| NULL, /* get_thread_area */ |
| NULL, /* install_fast_tracepoint_jump_pad */ |
| NULL, /* emit_ops */ |
| NULL, /* get_min_fast_tracepoint_insn_len */ |
| NULL, /* supports_range_stepping */ |
| NULL, /* breakpoint_kind_from_current_state */ |
| bfin_supports_hardware_single_step, |
| }; |
| |
| |
| void |
| initialize_low_arch (void) |
| { |
| init_registers_bfin (); |
| } |