| /* GNU/Linux/SH specific low level interface, for the remote server for GDB. |
| Copyright (C) 1995-2020 Free Software Foundation, 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" |
| |
| /* Defined in auto-generated file reg-sh.c. */ |
| void init_registers_sh (void); |
| extern const struct target_desc *tdesc_sh; |
| |
| #ifdef HAVE_SYS_REG_H |
| #include <sys/reg.h> |
| #endif |
| |
| #include <asm/ptrace.h> |
| |
| #define sh_num_regs 41 |
| |
| /* Currently, don't check/send MQ. */ |
| static int sh_regmap[] = { |
| 0, 4, 8, 12, 16, 20, 24, 28, |
| 32, 36, 40, 44, 48, 52, 56, 60, |
| |
| REG_PC*4, REG_PR*4, REG_GBR*4, -1, |
| REG_MACH*4, REG_MACL*4, REG_SR*4, |
| REG_FPUL*4, REG_FPSCR*4, |
| |
| REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12, |
| REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28, |
| REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44, |
| REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60, |
| }; |
| |
| static int |
| sh_cannot_store_register (int regno) |
| { |
| return 0; |
| } |
| |
| static int |
| sh_cannot_fetch_register (int regno) |
| { |
| return 0; |
| } |
| |
| /* Correct in either endianness, obviously. */ |
| static const unsigned short sh_breakpoint = 0xc3c3; |
| #define sh_breakpoint_len 2 |
| |
| /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
| |
| static const gdb_byte * |
| sh_sw_breakpoint_from_kind (int kind, int *size) |
| { |
| *size = sh_breakpoint_len; |
| return (const gdb_byte *) &sh_breakpoint; |
| } |
| |
| static int |
| sh_breakpoint_at (CORE_ADDR where) |
| { |
| unsigned short insn; |
| |
| the_target->read_memory (where, (unsigned char *) &insn, 2); |
| if (insn == sh_breakpoint) |
| return 1; |
| |
| /* If necessary, recognize more trap instructions here. GDB only uses the |
| one. */ |
| return 0; |
| } |
| |
| /* Support for hardware single step. */ |
| |
| static int |
| sh_supports_hardware_single_step (void) |
| { |
| return 1; |
| } |
| |
| /* Provide only a fill function for the general register set. ps_lgetregs |
| will use this for NPTL support. */ |
| |
| static void sh_fill_gregset (struct regcache *regcache, void *buf) |
| { |
| int i; |
| |
| for (i = 0; i < 23; i++) |
| if (sh_regmap[i] != -1) |
| collect_register (regcache, i, (char *) buf + sh_regmap[i]); |
| } |
| |
| static struct regset_info sh_regsets[] = { |
| { 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL }, |
| NULL_REGSET |
| }; |
| |
| static struct regsets_info sh_regsets_info = |
| { |
| sh_regsets, /* regsets */ |
| 0, /* num_regsets */ |
| NULL, /* disabled_regsets */ |
| }; |
| |
| static struct usrregs_info sh_usrregs_info = |
| { |
| sh_num_regs, |
| sh_regmap, |
| }; |
| |
| static struct regs_info regs_info = |
| { |
| NULL, /* regset_bitmap */ |
| &sh_usrregs_info, |
| &sh_regsets_info |
| }; |
| |
| static const struct regs_info * |
| sh_regs_info (void) |
| { |
| return ®s_info; |
| } |
| |
| static void |
| sh_arch_setup (void) |
| { |
| current_process ()->tdesc = tdesc_sh; |
| } |
| |
| struct linux_target_ops the_low_target = { |
| sh_arch_setup, |
| sh_regs_info, |
| sh_cannot_fetch_register, |
| sh_cannot_store_register, |
| NULL, /* fetch_register */ |
| linux_get_pc_32bit, |
| linux_set_pc_32bit, |
| NULL, /* breakpoint_kind_from_pc */ |
| sh_sw_breakpoint_from_kind, |
| NULL, |
| 0, |
| sh_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 */ |
| sh_supports_hardware_single_step, |
| }; |
| |
| void |
| initialize_low_arch (void) |
| { |
| init_registers_sh (); |
| |
| initialize_regsets_info (&sh_regsets_info); |
| } |