/* GNU/Linux/TILE-Gx specific low level interface, GDBserver. Copyright (C) 2012-2015 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 . */ #include "server.h" #include "linux-low.h" #include #include "nat/gdb_ptrace.h" /* Defined in auto-generated file reg-tilegx.c. */ void init_registers_tilegx (void); extern const struct target_desc *tdesc_tilegx; /* Defined in auto-generated file reg-tilegx32.c. */ void init_registers_tilegx32 (void); extern const struct target_desc *tdesc_tilegx32; #define tile_num_regs 65 static int tile_regmap[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, -1, -1, -1, -1, -1, -1, -1, -1, 56 }; static int tile_cannot_fetch_register (int regno) { if (regno >= 0 && regno < 56) return 0; else if (regno == 64) return 0; else return 1; } static int tile_cannot_store_register (int regno) { if (regno >= 0 && regno < 56) return 0; else if (regno == 64) return 0; else return 1; } static CORE_ADDR tile_get_pc (struct regcache *regcache) { unsigned long pc; collect_register_by_name (regcache, "pc", &pc); return pc; } static void tile_set_pc (struct regcache *regcache, CORE_ADDR pc) { unsigned long newpc = pc; supply_register_by_name (regcache, "pc", &newpc); } static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; #define tile_breakpoint_len 8 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ static const gdb_byte * tile_sw_breakpoint_from_kind (int kind, int *size) { *size = tile_breakpoint_len; return (const gdb_byte *) &tile_breakpoint; } static int tile_breakpoint_at (CORE_ADDR where) { uint64_t insn; (*the_target->read_memory) (where, (unsigned char *) &insn, 8); if (insn == tile_breakpoint) return 1; /* If necessary, recognize more trap instructions here. GDB only uses the one. */ return 0; } static void tile_fill_gregset (struct regcache *regcache, void *buf) { int i; for (i = 0; i < tile_num_regs; i++) if (tile_regmap[i] != -1) collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); } static void tile_store_gregset (struct regcache *regcache, const void *buf) { int i; for (i = 0; i < tile_num_regs; i++) if (tile_regmap[i] != -1) supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); } static struct regset_info tile_regsets[] = { { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8, GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, NULL_REGSET }; static struct regsets_info tile_regsets_info = { tile_regsets, /* regsets */ 0, /* num_regsets */ NULL, /* disabled_regsets */ }; static struct usrregs_info tile_usrregs_info = { tile_num_regs, tile_regmap, }; static struct regs_info regs_info = { NULL, /* regset_bitmap */ &tile_usrregs_info, &tile_regsets_info, }; static const struct regs_info * tile_regs_info (void) { return ®s_info; } static void tile_arch_setup (void) { int pid = pid_of (current_thread); unsigned int machine; int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine); if (sizeof (void *) == 4) if (is_elf64 > 0) error (_("Can't debug 64-bit process with 32-bit GDBserver")); if (!is_elf64) current_process ()->tdesc = tdesc_tilegx32; else current_process ()->tdesc = tdesc_tilegx; } struct linux_target_ops the_low_target = { tile_arch_setup, tile_regs_info, tile_cannot_fetch_register, tile_cannot_store_register, NULL, tile_get_pc, tile_set_pc, NULL, /* breakpoint_kind_from_pc */ tile_sw_breakpoint_from_kind, NULL, 0, tile_breakpoint_at, }; void initialize_low_arch (void) { init_registers_tilegx32(); init_registers_tilegx(); initialize_regsets_info (&tile_regsets_info); }