198 lines
4.5 KiB
C++
198 lines
4.5 KiB
C++
/* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
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Copyright (C) 2005-2020 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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#ifdef HAVE_SYS_REG_H
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#include <sys/reg.h>
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#endif
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/* Linux target op definitions for the m32r architecture. */
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class m32r_target : public linux_process_target
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{
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public:
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const regs_info *get_regs_info () override;
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protected:
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void low_arch_setup () override;
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bool low_cannot_fetch_register (int regno) override;
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bool low_cannot_store_register (int regno) override;
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bool low_supports_breakpoints () override;
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CORE_ADDR low_get_pc (regcache *regcache) override;
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void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
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};
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/* The singleton target ops object. */
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static m32r_target the_m32r_target;
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bool
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m32r_target::low_supports_breakpoints ()
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{
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return true;
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}
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CORE_ADDR
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m32r_target::low_get_pc (regcache *regcache)
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{
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return linux_get_pc_32bit (regcache);
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}
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void
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m32r_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
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{
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linux_set_pc_32bit (regcache, pc);
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}
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/* Defined in auto-generated file reg-m32r.c. */
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void init_registers_m32r (void);
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extern const struct target_desc *tdesc_m32r;
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#define m32r_num_regs 25
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static int m32r_regmap[] = {
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#ifdef PT_R0
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PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
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PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
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PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
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#else
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4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
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4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
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4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
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#endif
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};
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bool
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m32r_target::low_cannot_store_register (int regno)
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{
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return (regno >= m32r_num_regs);
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}
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bool
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m32r_target::low_cannot_fetch_register (int regno)
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{
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return (regno >= m32r_num_regs);
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}
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static const unsigned short m32r_breakpoint = 0x10f1;
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#define m32r_breakpoint_len 2
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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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m32r_sw_breakpoint_from_kind (int kind, int *size)
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{
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*size = m32r_breakpoint_len;
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return (const gdb_byte *) &m32r_breakpoint;
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}
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static int
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m32r_breakpoint_at (CORE_ADDR where)
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{
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unsigned short insn;
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the_target->read_memory (where, (unsigned char *) &insn,
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m32r_breakpoint_len);
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if (insn == m32r_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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void
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m32r_target::low_arch_setup ()
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{
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current_process ()->tdesc = tdesc_m32r;
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}
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/* Support for hardware single step. */
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static int
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m32r_supports_hardware_single_step (void)
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{
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return 1;
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}
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static struct usrregs_info m32r_usrregs_info =
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{
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m32r_num_regs,
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m32r_regmap,
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};
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static struct regs_info myregs_info =
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{
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NULL, /* regset_bitmap */
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&m32r_usrregs_info,
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};
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const regs_info *
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m32r_target::get_regs_info ()
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{
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return &myregs_info;
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}
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struct linux_target_ops the_low_target = {
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m32r_sw_breakpoint_from_kind,
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NULL,
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0,
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m32r_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, /* delete_process */
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NULL, /* new_thread */
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NULL, /* delete_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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m32r_supports_hardware_single_step,
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};
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/* The linux target ops object. */
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linux_process_target *the_linux_target = &the_m32r_target;
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void
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initialize_low_arch (void)
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{
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init_registers_m32r ();
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}
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