mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/* Ravenscar x86-64 target support.
|
|
|
|
Copyright (C) 2020-2021 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 "defs.h"
|
|
#include "gdbarch.h"
|
|
#include "gdbcore.h"
|
|
#include "regcache.h"
|
|
#include "amd64-tdep.h"
|
|
#include "inferior.h"
|
|
#include "ravenscar-thread.h"
|
|
#include "amd64-ravenscar-thread.h"
|
|
|
|
struct amd64_ravenscar_ops : public ravenscar_arch_ops
|
|
{
|
|
void fetch_registers (struct regcache *regcache, int regnum) override;
|
|
void store_registers (struct regcache *regcache, int regnum) override;
|
|
|
|
private:
|
|
|
|
/* Return the offset of the register in the context buffer. */
|
|
int register_offset (struct gdbarch *arch, int regnum);
|
|
};
|
|
|
|
/* x86-64 Ravenscar stores registers as:
|
|
|
|
type Context_Buffer is record
|
|
RIP : System.Address;
|
|
RFLAGS : EFLAGS;
|
|
RSP : System.Address;
|
|
|
|
RBX : System.Address;
|
|
RBP : System.Address;
|
|
R12 : System.Address;
|
|
R13 : System.Address;
|
|
R14 : System.Address;
|
|
R15 : System.Address;
|
|
end record;
|
|
*/
|
|
static const int register_layout[] =
|
|
{
|
|
AMD64_RIP_REGNUM,
|
|
AMD64_EFLAGS_REGNUM,
|
|
AMD64_RSP_REGNUM,
|
|
AMD64_RBX_REGNUM,
|
|
AMD64_RBP_REGNUM,
|
|
AMD64_R12_REGNUM,
|
|
AMD64_R13_REGNUM,
|
|
AMD64_R14_REGNUM,
|
|
AMD64_R15_REGNUM,
|
|
};
|
|
|
|
int
|
|
amd64_ravenscar_ops::register_offset (struct gdbarch *arch, int regnum)
|
|
{
|
|
for (int i = 0; i < ARRAY_SIZE (register_layout); ++i)
|
|
if (register_layout[i] == regnum)
|
|
return i * 8;
|
|
/* Not saved. */
|
|
return -1;
|
|
}
|
|
|
|
/* Supply register REGNUM, which has been saved at REGISTER_ADDR, to
|
|
the regcache. */
|
|
|
|
static void
|
|
supply_register_at_address (struct regcache *regcache, int regnum,
|
|
CORE_ADDR register_addr)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
int buf_size = register_size (gdbarch, regnum);
|
|
gdb_byte *buf;
|
|
|
|
buf = (gdb_byte *) alloca (buf_size);
|
|
read_memory (register_addr, buf, buf_size);
|
|
regcache->raw_supply (regnum, buf);
|
|
}
|
|
|
|
void
|
|
amd64_ravenscar_ops::fetch_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
const int num_regs = gdbarch_num_regs (gdbarch);
|
|
int current_regnum;
|
|
CORE_ADDR current_address;
|
|
CORE_ADDR thread_descriptor_address;
|
|
|
|
/* The tid is the thread_id field, which is a pointer to the thread. */
|
|
thread_descriptor_address = (CORE_ADDR) inferior_ptid.tid ();
|
|
|
|
/* Read registers. */
|
|
for (current_regnum = 0; current_regnum < num_regs; current_regnum++)
|
|
{
|
|
int offset = register_offset (gdbarch, current_regnum);
|
|
|
|
if (offset != -1)
|
|
{
|
|
current_address = thread_descriptor_address + offset;
|
|
supply_register_at_address (regcache, current_regnum,
|
|
current_address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
amd64_ravenscar_ops::store_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
int buf_size = register_size (gdbarch, regnum);
|
|
gdb_byte buf[buf_size];
|
|
CORE_ADDR register_address;
|
|
|
|
int offset = register_offset (gdbarch, regnum);
|
|
if (offset != -1)
|
|
{
|
|
register_address = inferior_ptid.tid () + offset;
|
|
|
|
regcache->raw_collect (regnum, buf);
|
|
write_memory (register_address,
|
|
buf,
|
|
buf_size);
|
|
}
|
|
}
|
|
|
|
/* The ravenscar_arch_ops vector for AMD64 targets. */
|
|
|
|
static struct amd64_ravenscar_ops amd64_ravenscar_ops;
|
|
|
|
/* Register amd64_ravenscar_ops in GDBARCH. */
|
|
|
|
void
|
|
register_amd64_ravenscar_ops (struct gdbarch *gdbarch)
|
|
{
|
|
set_gdbarch_ravenscar_ops (gdbarch, &amd64_ravenscar_ops);
|
|
}
|