mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
213516ef31
This commit is the result of running the gdb/copyright.py script, which automated the update of the copyright year range for all source files managed by the GDB project to be updated to include year 2023.
267 lines
6.2 KiB
C++
267 lines
6.2 KiB
C++
/* GNU/Linux/OR1K specific low level interface for the GDB server.
|
|
Copyright (C) 2021-2023 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"
|
|
#include "elf/common.h"
|
|
#include "nat/gdb_ptrace.h"
|
|
#include <endian.h>
|
|
#include "gdb_proc_service.h"
|
|
#include <asm/ptrace.h>
|
|
|
|
#ifndef PTRACE_GET_THREAD_AREA
|
|
#define PTRACE_GET_THREAD_AREA 25
|
|
#endif
|
|
|
|
/* Linux target op definitions for the OpenRISC architecture. */
|
|
|
|
class or1k_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 or1k_target the_or1k_target;
|
|
|
|
bool
|
|
or1k_target::low_supports_breakpoints ()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
CORE_ADDR
|
|
or1k_target::low_get_pc (regcache *regcache)
|
|
{
|
|
return linux_get_pc_32bit (regcache);
|
|
}
|
|
|
|
void
|
|
or1k_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
|
|
{
|
|
linux_set_pc_32bit (regcache, pc);
|
|
}
|
|
|
|
/* The following definition must agree with the number of registers
|
|
defined in "struct user_regs" in GLIBC
|
|
(sysdeps/unix/sysv/linux/or1k/sys/ucontext.h), and also with
|
|
OR1K_NUM_REGS in GDB proper. */
|
|
|
|
#define or1k_num_regs 35
|
|
|
|
/* Defined in auto-generated file or1k-linux.c. */
|
|
|
|
void init_registers_or1k_linux (void);
|
|
extern const struct target_desc *tdesc_or1k_linux;
|
|
|
|
/* This union is used to convert between int and byte buffer
|
|
representations of register contents. */
|
|
|
|
union or1k_register
|
|
{
|
|
unsigned char buf[4];
|
|
int reg32;
|
|
};
|
|
|
|
/* Return the ptrace ``address'' of register REGNO. */
|
|
|
|
static int or1k_regmap[] = {
|
|
-1, 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,
|
|
-1, /* PC */
|
|
-1, /* ORIGINAL R11 */
|
|
-1 /* SYSCALL NO */
|
|
};
|
|
|
|
/* Implement the low_arch_setup linux target ops method. */
|
|
|
|
void
|
|
or1k_target::low_arch_setup ()
|
|
{
|
|
current_process ()->tdesc = tdesc_or1k_linux;
|
|
}
|
|
|
|
/* Implement the low_cannot_fetch_register linux target ops method. */
|
|
|
|
bool
|
|
or1k_target::low_cannot_fetch_register (int regno)
|
|
{
|
|
return (or1k_regmap[regno] == -1);
|
|
}
|
|
|
|
/* Implement the low_cannot_store_register linux target ops method. */
|
|
|
|
bool
|
|
or1k_target::low_cannot_store_register (int regno)
|
|
{
|
|
return (or1k_regmap[regno] == -1);
|
|
}
|
|
|
|
/* Breakpoint support. */
|
|
|
|
static const unsigned int or1k_breakpoint = 0x21000001;
|
|
#define or1k_breakpoint_len 4
|
|
|
|
/* Implementation of target ops method "sw_breakpoint_from_kind". */
|
|
|
|
const gdb_byte *
|
|
or1k_target::sw_breakpoint_from_kind (int kind, int *size)
|
|
{
|
|
*size = or1k_breakpoint_len;
|
|
return (const gdb_byte *) &or1k_breakpoint;
|
|
}
|
|
|
|
/* Implement the low_breakpoint_at linux target ops method. */
|
|
|
|
bool
|
|
or1k_target::low_breakpoint_at (CORE_ADDR where)
|
|
{
|
|
unsigned int insn;
|
|
|
|
read_memory (where, (unsigned char *) &insn, or1k_breakpoint_len);
|
|
if (insn == or1k_breakpoint)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/* Fetch the thread-local storage pointer for libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
*base = (void *) ((char *) *base - idx);
|
|
|
|
return PS_OK;
|
|
}
|
|
|
|
/* Helper functions to collect/supply a single register REGNO. */
|
|
|
|
static void
|
|
or1k_collect_register (struct regcache *regcache, int regno,
|
|
union or1k_register *reg)
|
|
{
|
|
union or1k_register tmp_reg;
|
|
|
|
collect_register (regcache, regno, &tmp_reg.reg32);
|
|
reg->reg32 = tmp_reg.reg32;
|
|
}
|
|
|
|
static void
|
|
or1k_supply_register (struct regcache *regcache, int regno,
|
|
const union or1k_register *reg)
|
|
{
|
|
supply_register (regcache, regno, reg->buf);
|
|
}
|
|
|
|
/* We have only a single register set on OpenRISC. */
|
|
|
|
static void
|
|
or1k_fill_gregset (struct regcache *regcache, void *buf)
|
|
{
|
|
union or1k_register *regset = (union or1k_register *) buf;
|
|
int i;
|
|
|
|
for (i = 1; i < or1k_num_regs; i++)
|
|
or1k_collect_register (regcache, i, regset + i);
|
|
}
|
|
|
|
static void
|
|
or1k_store_gregset (struct regcache *regcache, const void *buf)
|
|
{
|
|
const union or1k_register *regset = (union or1k_register *) buf;
|
|
int i;
|
|
|
|
for (i = 0; i < or1k_num_regs; i++)
|
|
or1k_supply_register (regcache, i, regset + i);
|
|
}
|
|
|
|
static struct regset_info or1k_regsets[] =
|
|
{
|
|
{ PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS,
|
|
or1k_num_regs * 4, GENERAL_REGS,
|
|
or1k_fill_gregset, or1k_store_gregset },
|
|
NULL_REGSET
|
|
};
|
|
|
|
static struct regsets_info or1k_regsets_info =
|
|
{
|
|
or1k_regsets, /* regsets */
|
|
0, /* num_regsets */
|
|
NULL, /* disabled_regsets */
|
|
};
|
|
|
|
static struct usrregs_info or1k_usrregs_info =
|
|
{
|
|
or1k_num_regs,
|
|
or1k_regmap,
|
|
};
|
|
|
|
static struct regs_info or1k_regs =
|
|
{
|
|
NULL, /* regset_bitmap */
|
|
&or1k_usrregs_info,
|
|
&or1k_regsets_info
|
|
};
|
|
|
|
const regs_info *
|
|
or1k_target::get_regs_info ()
|
|
{
|
|
return &or1k_regs;
|
|
}
|
|
|
|
/* The linux target ops object. */
|
|
|
|
linux_process_target *the_linux_target = &the_or1k_target;
|
|
|
|
void
|
|
initialize_low_arch (void)
|
|
{
|
|
init_registers_or1k_linux ();
|
|
|
|
initialize_regsets_info (&or1k_regsets_info);
|
|
}
|