mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-28 04:25:10 +08:00
137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/* Native-dependent code for X86 BSD's.
|
||
|
||
Copyright (C) 2003-2020 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 "defs.h"
|
||
#include "inferior.h"
|
||
#include "gdbthread.h"
|
||
|
||
/* We include <signal.h> to make sure `struct fxsave64' is defined on
|
||
NetBSD, since NetBSD's <machine/reg.h> needs it. */
|
||
#include <signal.h>
|
||
#include <sys/types.h>
|
||
#include <sys/ptrace.h>
|
||
#include <machine/reg.h>
|
||
|
||
#include "x86-nat.h"
|
||
#include "x86-bsd-nat.h"
|
||
#include "inf-ptrace.h"
|
||
|
||
|
||
#ifdef PT_GETXSTATE_INFO
|
||
size_t x86bsd_xsave_len;
|
||
#endif
|
||
|
||
/* Support for debug registers. */
|
||
|
||
#ifdef HAVE_PT_GETDBREGS
|
||
|
||
/* Helper macro to access debug register X. FreeBSD/amd64 and modern
|
||
versions of FreeBSD/i386 provide this macro in system headers. Define
|
||
a local version for systems that do not provide it. */
|
||
#ifndef DBREG_DRX
|
||
#ifdef __NetBSD__
|
||
#define DBREG_DRX(d, x) ((d)->dr[x])
|
||
#else
|
||
#define DBREG_DRX(d, x) ((&d->dr0)[x])
|
||
#endif
|
||
#endif
|
||
|
||
static unsigned long
|
||
x86bsd_dr_get (ptid_t ptid, int regnum)
|
||
{
|
||
struct dbreg dbregs;
|
||
|
||
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
|
||
perror_with_name (_("Couldn't read debug registers"));
|
||
|
||
return DBREG_DRX ((&dbregs), regnum);
|
||
}
|
||
|
||
static void
|
||
x86bsd_dr_set (int regnum, unsigned long value)
|
||
{
|
||
struct dbreg dbregs;
|
||
|
||
if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
|
||
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get debug registers"));
|
||
|
||
/* For some mysterious reason, some of the reserved bits in the
|
||
debug control register get set. Mask these off, otherwise the
|
||
ptrace call below will fail. */
|
||
DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
|
||
|
||
DBREG_DRX ((&dbregs), regnum) = value;
|
||
|
||
for (thread_info *thread : current_inferior ()->non_exited_threads ())
|
||
{
|
||
if (ptrace (PT_SETDBREGS, get_ptrace_pid (thread->ptid),
|
||
(PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
|
||
perror_with_name (_("Couldn't write debug registers"));
|
||
}
|
||
}
|
||
|
||
static void
|
||
x86bsd_dr_set_control (unsigned long control)
|
||
{
|
||
x86bsd_dr_set (7, control);
|
||
}
|
||
|
||
static void
|
||
x86bsd_dr_set_addr (int regnum, CORE_ADDR addr)
|
||
{
|
||
gdb_assert (regnum >= 0 && regnum <= 4);
|
||
|
||
x86bsd_dr_set (regnum, addr);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
x86bsd_dr_get_addr (int regnum)
|
||
{
|
||
return x86bsd_dr_get (inferior_ptid, regnum);
|
||
}
|
||
|
||
static unsigned long
|
||
x86bsd_dr_get_status (void)
|
||
{
|
||
return x86bsd_dr_get (inferior_ptid, 6);
|
||
}
|
||
|
||
static unsigned long
|
||
x86bsd_dr_get_control (void)
|
||
{
|
||
return x86bsd_dr_get (inferior_ptid, 7);
|
||
}
|
||
|
||
#endif /* PT_GETDBREGS */
|
||
|
||
void
|
||
_initialize_x86_bsd_nat ()
|
||
{
|
||
#ifdef HAVE_PT_GETDBREGS
|
||
x86_dr_low.set_control = x86bsd_dr_set_control;
|
||
x86_dr_low.set_addr = x86bsd_dr_set_addr;
|
||
x86_dr_low.get_addr = x86bsd_dr_get_addr;
|
||
x86_dr_low.get_status = x86bsd_dr_get_status;
|
||
x86_dr_low.get_control = x86bsd_dr_get_control;
|
||
x86_set_debug_register_length (sizeof (void *));
|
||
#endif /* HAVE_PT_GETDBREGS */
|
||
}
|