/* 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 . */ #include "server.h" #include "linux-low.h" #include /* 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, /* delete_process */ NULL, /* new_thread */ NULL, /* delete_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 (); }