238 lines
5.3 KiB
C
238 lines
5.3 KiB
C
/* GNU/Linux/TILE-Gx specific low level interface, GDBserver.
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Copyright (C) 2012-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "linux-low.h"
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#include <arch/abi.h>
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#include "nat/gdb_ptrace.h"
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/* Defined in auto-generated file reg-tilegx.c. */
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void init_registers_tilegx (void);
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extern const struct target_desc *tdesc_tilegx;
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/* Defined in auto-generated file reg-tilegx32.c. */
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void init_registers_tilegx32 (void);
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extern const struct target_desc *tdesc_tilegx32;
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#define tile_num_regs 65
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static int tile_regmap[] =
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{
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0, 1, 2, 3, 4, 5, 6, 7,
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8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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-1, -1, -1, -1, -1, -1, -1, -1,
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56
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};
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static int
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tile_cannot_fetch_register (int regno)
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{
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if (regno >= 0 && regno < 56)
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return 0;
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else if (regno == 64)
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return 0;
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else
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return 1;
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}
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static int
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tile_cannot_store_register (int regno)
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{
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if (regno >= 0 && regno < 56)
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return 0;
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else if (regno == 64)
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return 0;
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else
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return 1;
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}
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static CORE_ADDR
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tile_get_pc (struct regcache *regcache)
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{
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unsigned long pc;
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collect_register_by_name (regcache, "pc", &pc);
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return pc;
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}
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static void
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tile_set_pc (struct regcache *regcache, CORE_ADDR pc)
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{
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unsigned long newpc = pc;
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supply_register_by_name (regcache, "pc", &newpc);
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}
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static uint64_t tile_breakpoint = 0x400b3cae70166000ULL;
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#define tile_breakpoint_len 8
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/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
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static const gdb_byte *
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tile_sw_breakpoint_from_kind (int kind, int *size)
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{
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*size = tile_breakpoint_len;
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return (const gdb_byte *) &tile_breakpoint;
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}
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static int
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tile_breakpoint_at (CORE_ADDR where)
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{
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uint64_t insn;
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(*the_target->read_memory) (where, (unsigned char *) &insn, 8);
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if (insn == tile_breakpoint)
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return 1;
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/* If necessary, recognize more trap instructions here. GDB only uses the
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one. */
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return 0;
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}
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static void
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tile_fill_gregset (struct regcache *regcache, void *buf)
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{
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int i;
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for (i = 0; i < tile_num_regs; i++)
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if (tile_regmap[i] != -1)
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collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
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}
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static void
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tile_store_gregset (struct regcache *regcache, const void *buf)
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{
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int i;
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for (i = 0; i < tile_num_regs; i++)
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if (tile_regmap[i] != -1)
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supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
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}
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static struct regset_info tile_regsets[] =
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{
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{ PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8,
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GENERAL_REGS, tile_fill_gregset, tile_store_gregset },
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NULL_REGSET
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};
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static struct regsets_info tile_regsets_info =
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{
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tile_regsets, /* regsets */
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0, /* num_regsets */
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NULL, /* disabled_regsets */
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};
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static struct usrregs_info tile_usrregs_info =
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{
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tile_num_regs,
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tile_regmap,
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};
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static struct regs_info regs_info =
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{
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NULL, /* regset_bitmap */
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&tile_usrregs_info,
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&tile_regsets_info,
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};
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static const struct regs_info *
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tile_regs_info (void)
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{
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return ®s_info;
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}
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static void
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tile_arch_setup (void)
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{
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int pid = pid_of (current_thread);
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unsigned int machine;
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int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine);
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if (sizeof (void *) == 4)
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if (is_elf64 > 0)
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error (_("Can't debug 64-bit process with 32-bit GDBserver"));
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if (!is_elf64)
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current_process ()->tdesc = tdesc_tilegx32;
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else
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current_process ()->tdesc = tdesc_tilegx;
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}
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/* Support for hardware single step. */
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static int
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tile_supports_hardware_single_step (void)
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{
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return 1;
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}
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struct linux_target_ops the_low_target =
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{
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tile_arch_setup,
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tile_regs_info,
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tile_cannot_fetch_register,
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tile_cannot_store_register,
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NULL,
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tile_get_pc,
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tile_set_pc,
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NULL, /* breakpoint_kind_from_pc */
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tile_sw_breakpoint_from_kind,
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NULL,
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0,
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tile_breakpoint_at,
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NULL, /* supports_z_point_type */
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NULL, /* insert_point */
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NULL, /* remove_point */
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NULL, /* stopped_by_watchpoint */
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NULL, /* stopped_data_address */
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NULL, /* collect_ptrace_register */
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NULL, /* supply_ptrace_register */
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NULL, /* siginfo_fixup */
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NULL, /* new_process */
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NULL, /* new_thread */
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NULL, /* new_fork */
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NULL, /* prepare_to_resume */
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NULL, /* process_qsupported */
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NULL, /* supports_tracepoints */
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NULL, /* get_thread_area */
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NULL, /* install_fast_tracepoint_jump_pad */
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NULL, /* emit_ops */
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NULL, /* get_min_fast_tracepoint_insn_len */
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NULL, /* supports_range_stepping */
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NULL, /* breakpoint_kind_from_current_state */
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tile_supports_hardware_single_step,
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};
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void
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initialize_low_arch (void)
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{
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init_registers_tilegx32();
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init_registers_tilegx();
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initialize_regsets_info (&tile_regsets_info);
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}
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