/* GNU/Linux/m68k specific low level interface, for the remote server for GDB. Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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 2 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "server.h" #include "linux-low.h" #ifdef HAVE_SYS_REG_H #include <sys/reg.h> #endif #define m68k_num_regs 29 #define m68k_num_gregs 18 /* This table must line up with REGISTER_NAMES in tm-m68k.h */ static int m68k_regmap[] = { #ifdef PT_D0 PT_D0 * 4, PT_D1 * 4, PT_D2 * 4, PT_D3 * 4, PT_D4 * 4, PT_D5 * 4, PT_D6 * 4, PT_D7 * 4, PT_A0 * 4, PT_A1 * 4, PT_A2 * 4, PT_A3 * 4, PT_A4 * 4, PT_A5 * 4, PT_A6 * 4, PT_USP * 4, PT_SR * 4, PT_PC * 4, #else 14 * 4, 0 * 4, 1 * 4, 2 * 4, 3 * 4, 4 * 4, 5 * 4, 6 * 4, 7 * 4, 8 * 4, 9 * 4, 10 * 4, 11 * 4, 12 * 4, 13 * 4, 15 * 4, 17 * 4, 18 * 4, #endif #ifdef PT_FP0 PT_FP0 * 4, PT_FP1 * 4, PT_FP2 * 4, PT_FP3 * 4, PT_FP4 * 4, PT_FP5 * 4, PT_FP6 * 4, PT_FP7 * 4, PT_FPCR * 4, PT_FPSR * 4, PT_FPIAR * 4 #else 21 * 4, 24 * 4, 27 * 4, 30 * 4, 33 * 4, 36 * 4, 39 * 4, 42 * 4, 45 * 4, 46 * 4, 47 * 4 #endif }; static int m68k_cannot_store_register (int regno) { return (regno >= m68k_num_regs); } static int m68k_cannot_fetch_register (int regno) { return (regno >= m68k_num_regs); } #ifdef HAVE_PTRACE_GETREGS #include <sys/procfs.h> #include <sys/ptrace.h> static void m68k_fill_gregset (void *buf) { int i; for (i = 0; i < m68k_num_gregs; i++) collect_register (i, (char *) buf + m68k_regmap[i]); } static void m68k_store_gregset (const void *buf) { int i; for (i = 0; i < m68k_num_gregs; i++) supply_register (i, (const char *) buf + m68k_regmap[i]); } static void m68k_fill_fpregset (void *buf) { int i; for (i = m68k_num_gregs; i < m68k_num_regs; i++) collect_register (i, ((char *) buf + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); } static void m68k_store_fpregset (const void *buf) { int i; for (i = m68k_num_gregs; i < m68k_num_regs; i++) supply_register (i, ((const char *) buf + (m68k_regmap[i] - m68k_regmap[m68k_num_gregs]))); } #endif /* HAVE_PTRACE_GETREGS */ struct regset_info target_regsets[] = { #ifdef HAVE_PTRACE_GETREGS { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t), GENERAL_REGS, m68k_fill_gregset, m68k_store_gregset }, { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (elf_fpregset_t), FP_REGS, m68k_fill_fpregset, m68k_store_fpregset }, #endif /* HAVE_PTRACE_GETREGS */ { 0, 0, -1, -1, NULL, NULL } }; static const unsigned char m68k_breakpoint[] = { 0x4E, 0x4F }; #define m68k_breakpoint_len 2 static CORE_ADDR m68k_get_pc () { unsigned long pc; collect_register_by_name ("pc", &pc); return pc; } static void m68k_set_pc (CORE_ADDR value) { unsigned long newpc = value; supply_register_by_name ("pc", &newpc); } static int m68k_breakpoint_at (CORE_ADDR pc) { unsigned char c[2]; read_inferior_memory (pc, c, 2); if (c[0] == 0x4E && c[1] == 0x4F) return 1; return 0; } struct linux_target_ops the_low_target = { m68k_num_regs, m68k_regmap, m68k_cannot_fetch_register, m68k_cannot_store_register, m68k_get_pc, m68k_set_pc, m68k_breakpoint, m68k_breakpoint_len, NULL, 2, m68k_breakpoint_at, };