| /* GNU/Linux/SH specific low level interface, for the remote server for GDB. |
| Copyright (C) 1995-2021 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" |
| |
| /* Linux target op definitions for the SH architecture. */ |
| |
| class sh_target : public linux_process_target |
| { |
| public: |
| |
| const regs_info *get_regs_info () override; |
| |
| const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
| |
| protected: |
| |
| void low_arch_setup () override; |
| |
| bool low_cannot_fetch_register (int regno) override; |
| |
| bool low_cannot_store_register (int regno) override; |
| |
| bool low_supports_breakpoints () override; |
| |
| CORE_ADDR low_get_pc (regcache *regcache) override; |
| |
| void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; |
| |
| bool low_breakpoint_at (CORE_ADDR pc) override; |
| }; |
| |
| /* The singleton target ops object. */ |
| |
| static sh_target the_sh_target; |
| |
| bool |
| sh_target::low_supports_breakpoints () |
| { |
| return true; |
| } |
| |
| CORE_ADDR |
| sh_target::low_get_pc (regcache *regcache) |
| { |
| return linux_get_pc_32bit (regcache); |
| } |
| |
| void |
| sh_target::low_set_pc (regcache *regcache, CORE_ADDR pc) |
| { |
| linux_set_pc_32bit (regcache, pc); |
| } |
| |
| /* 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, |
| }; |
| |
| bool |
| sh_target::low_cannot_store_register (int regno) |
| { |
| return false; |
| } |
| |
| bool |
| sh_target::low_cannot_fetch_register (int regno) |
| { |
| return false; |
| } |
| |
| /* Correct in either endianness, obviously. */ |
| static const unsigned short sh_breakpoint = 0xc3c3; |
| #define sh_breakpoint_len 2 |
| |
| /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
| |
| const gdb_byte * |
| sh_target::sw_breakpoint_from_kind (int kind, int *size) |
| { |
| *size = sh_breakpoint_len; |
| return (const gdb_byte *) &sh_breakpoint; |
| } |
| |
| bool |
| sh_target::low_breakpoint_at (CORE_ADDR where) |
| { |
| unsigned short insn; |
| |
| read_memory (where, (unsigned char *) &insn, 2); |
| if (insn == sh_breakpoint) |
| return true; |
| |
| /* If necessary, recognize more trap instructions here. GDB only uses the |
| one. */ |
| return false; |
| } |
| |
| /* 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 myregs_info = |
| { |
| NULL, /* regset_bitmap */ |
| &sh_usrregs_info, |
| &sh_regsets_info |
| }; |
| |
| const regs_info * |
| sh_target::get_regs_info () |
| { |
| return &myregs_info; |
| } |
| |
| void |
| sh_target::low_arch_setup () |
| { |
| current_process ()->tdesc = tdesc_sh; |
| } |
| |
| /* The linux target ops object. */ |
| |
| linux_process_target *the_linux_target = &the_sh_target; |
| |
| void |
| initialize_low_arch (void) |
| { |
| init_registers_sh (); |
| |
| initialize_regsets_info (&sh_regsets_info); |
| } |