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/* GNU/Linux/m32r specific low level interface, for the remote server for GDB.
Copyright (C) 2005-2020 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 <http://www.gnu.org/licenses/>. */
#include "server.h"
#include "linux-low.h"
#ifdef HAVE_SYS_REG_H
#include <sys/reg.h>
#endif
/* Linux target op definitions for the m32r architecture. */
class m32r_target : public linux_process_target
{
public:
const regs_info *get_regs_info () override;
const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;
protected:
void low_arch_setup () override;
bool low_cannot_fetch_register (int regno) override;
bool low_cannot_store_register (int regno) override;
bool low_supports_breakpoints () override;
CORE_ADDR low_get_pc (regcache *regcache) override;
void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
bool low_breakpoint_at (CORE_ADDR pc) override;
};
/* The singleton target ops object. */
static m32r_target the_m32r_target;
bool
m32r_target::low_supports_breakpoints ()
{
return true;
}
CORE_ADDR
m32r_target::low_get_pc (regcache *regcache)
{
return linux_get_pc_32bit (regcache);
}
void
m32r_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
{
linux_set_pc_32bit (regcache, pc);
}
/* Defined in auto-generated file reg-m32r.c. */
void init_registers_m32r (void);
extern const struct target_desc *tdesc_m32r;
#define m32r_num_regs 25
static int m32r_regmap[] = {
#ifdef PT_R0
PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_FP, PT_LR, PT_SPU,
PT_PSW, PT_CBR, PT_SPI, PT_SPU, PT_BPC, PT_PC, PT_ACCL, PT_ACCH, PT_EVB
#else
4 * 4, 4 * 5, 4 * 6, 4 * 7, 4 * 0, 4 * 1, 4 * 2, 4 * 8,
4 * 9, 4 * 10, 4 * 11, 4 * 12, 4 * 13, 4 * 24, 4 * 25, 4 * 23,
4 * 19, 4 * 31, 4 * 26, 4 * 23, 4 * 20, 4 * 30, 4 * 16, 4 * 15, 4 * 32
#endif
};
bool
m32r_target::low_cannot_store_register (int regno)
{
return (regno >= m32r_num_regs);
}
bool
m32r_target::low_cannot_fetch_register (int regno)
{
return (regno >= m32r_num_regs);
}
static const unsigned short m32r_breakpoint = 0x10f1;
#define m32r_breakpoint_len 2
/* Implementation of target ops method "sw_breakpoint_from_kind". */
const gdb_byte *
m32r_target::sw_breakpoint_from_kind (int kind, int *size)
{
*size = m32r_breakpoint_len;
return (const gdb_byte *) &m32r_breakpoint;
}
bool
m32r_target::low_breakpoint_at (CORE_ADDR where)
{
unsigned short insn;
read_memory (where, (unsigned char *) &insn, m32r_breakpoint_len);
if (insn == m32r_breakpoint)
return true;
/* If necessary, recognize more trap instructions here. GDB only uses the
one. */
return false;
}
void
m32r_target::low_arch_setup ()
{
current_process ()->tdesc = tdesc_m32r;
}
/* Support for hardware single step. */
static int
m32r_supports_hardware_single_step (void)
{
return 1;
}
static struct usrregs_info m32r_usrregs_info =
{
m32r_num_regs,
m32r_regmap,
};
static struct regs_info myregs_info =
{
NULL, /* regset_bitmap */
&m32r_usrregs_info,
};
const regs_info *
m32r_target::get_regs_info ()
{
return &myregs_info;
}
struct linux_target_ops the_low_target = {
NULL, /* stopped_by_watchpoint */
NULL, /* stopped_data_address */
NULL, /* collect_ptrace_register */
NULL, /* supply_ptrace_register */
NULL, /* siginfo_fixup */
NULL, /* new_process */
NULL, /* delete_process */
NULL, /* new_thread */
NULL, /* delete_thread */
NULL, /* new_fork */
NULL, /* prepare_to_resume */
NULL, /* process_qsupported */
NULL, /* supports_tracepoints */
NULL, /* get_thread_area */
NULL, /* install_fast_tracepoint_jump_pad */
NULL, /* emit_ops */
NULL, /* get_min_fast_tracepoint_insn_len */
NULL, /* supports_range_stepping */
m32r_supports_hardware_single_step,
};
/* The linux target ops object. */
linux_process_target *the_linux_target = &the_m32r_target;
void
initialize_low_arch (void)
{
init_registers_m32r ();
}
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