1 /* GNU/Linux/SH specific low level interface, for the remote server for GDB. 2 Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003 3 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, 20 Boston, MA 02111-1307, USA. */ 21 22 #include "server.h" 23 #include "linux-low.h" 24 25 #ifdef HAVE_SYS_REG_H 26 #include <sys/reg.h> 27 #endif 28 29 #include <asm/ptrace.h> 30 31 #define sh_num_regs 41 32 33 /* Currently, don't check/send MQ. */ 34 static int sh_regmap[] = { 35 0, 4, 8, 12, 16, 20, 24, 28, 36 32, 36, 40, 44, 48, 52, 56, 60, 37 38 REG_PC*4, REG_PR*4, REG_GBR*4, -1, 39 REG_MACH*4, REG_MACL*4, REG_SR*4, 40 REG_FPUL*4, REG_FPSCR*4, 41 42 REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12, 43 REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28, 44 REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44, 45 REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60, 46 }; 47 48 static int 49 sh_cannot_store_register (int regno) 50 { 51 return 0; 52 } 53 54 static int 55 sh_cannot_fetch_register (int regno) 56 { 57 return 0; 58 } 59 60 static CORE_ADDR 61 sh_get_pc () 62 { 63 unsigned long pc; 64 collect_register_by_name ("pc", &pc); 65 return pc; 66 } 67 68 static void 69 sh_set_pc (CORE_ADDR pc) 70 { 71 unsigned long newpc = pc; 72 supply_register_by_name ("pc", &newpc); 73 } 74 75 /* Correct in either endianness, obviously. */ 76 static const unsigned short sh_breakpoint = 0xc3c3; 77 #define sh_breakpoint_len 2 78 79 static int 80 sh_breakpoint_at (CORE_ADDR where) 81 { 82 unsigned short insn; 83 84 (*the_target->read_memory) (where, (char *) &insn, 2); 85 if (insn == sh_breakpoint) 86 return 1; 87 88 /* If necessary, recognize more trap instructions here. GDB only uses the 89 one. */ 90 return 0; 91 } 92 93 struct linux_target_ops the_low_target = { 94 sh_num_regs, 95 sh_regmap, 96 sh_cannot_fetch_register, 97 sh_cannot_store_register, 98 sh_get_pc, 99 sh_set_pc, 100 (const char *) &sh_breakpoint, 101 sh_breakpoint_len, 102 NULL, 103 0, 104 sh_breakpoint_at, 105 }; 106