mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-06 12:09:26 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* Native-dependent code for X86 BSD's.
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Copyright (C) 2003-2024 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 "defs.h"
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#include "inferior.h"
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#include "gdbthread.h"
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/* We include <signal.h> to make sure `struct fxsave64' is defined on
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NetBSD, since NetBSD's <machine/reg.h> needs it. */
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include "x86-nat.h"
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#include "x86-bsd-nat.h"
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#include "inf-ptrace.h"
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/* Support for debug registers. */
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#ifdef HAVE_PT_GETDBREGS
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static PTRACE_TYPE_RET
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gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr)
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{
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#ifdef __NetBSD__
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/* Support for NetBSD threads: unlike other ptrace implementations in this
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file, NetBSD requires that we pass both the pid and lwp. */
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return ptrace (request, ptid.pid (), addr, ptid.lwp ());
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#else
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pid_t pid = get_ptrace_pid (ptid);
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return ptrace (request, pid, addr, 0);
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#endif
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}
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/* Helper macro to access debug register X. FreeBSD/amd64 and modern
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versions of FreeBSD/i386 provide this macro in system headers. Define
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a local version for systems that do not provide it. */
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#ifndef DBREG_DRX
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#ifdef __NetBSD__
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#define DBREG_DRX(d, x) ((d)->dr[x])
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#else
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#define DBREG_DRX(d, x) ((&d->dr0)[x])
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#endif
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#endif
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static unsigned long
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x86bsd_dr_get (ptid_t ptid, int regnum)
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{
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struct dbreg dbregs;
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if (gdb_ptrace (PT_GETDBREGS, ptid, (PTRACE_TYPE_ARG3) &dbregs) == -1)
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perror_with_name (_("Couldn't read debug registers"));
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return DBREG_DRX ((&dbregs), regnum);
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}
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static void
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x86bsd_dr_set (ptid_t ptid, int regnum, unsigned long value)
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{
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struct dbreg dbregs;
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if (gdb_ptrace (PT_GETDBREGS, ptid, (PTRACE_TYPE_ARG3) &dbregs) == -1)
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perror_with_name (_("Couldn't get debug registers"));
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/* For some mysterious reason, some of the reserved bits in the
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debug control register get set. Mask these off, otherwise the
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ptrace call below will fail. */
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DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
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DBREG_DRX ((&dbregs), regnum) = value;
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for (thread_info *thread : current_inferior ()->non_exited_threads ())
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{
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if (gdb_ptrace (PT_SETDBREGS, thread->ptid,
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(PTRACE_TYPE_ARG3) &dbregs) == -1)
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perror_with_name (_("Couldn't write debug registers"));
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}
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}
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static void
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x86bsd_dr_set_control (unsigned long control)
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{
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x86bsd_dr_set (inferior_ptid, 7, control);
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}
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static void
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x86bsd_dr_set_addr (int regnum, CORE_ADDR addr)
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{
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gdb_assert (regnum >= 0 && regnum <= 4);
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x86bsd_dr_set (inferior_ptid, regnum, addr);
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}
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static CORE_ADDR
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x86bsd_dr_get_addr (int regnum)
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{
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return x86bsd_dr_get (inferior_ptid, regnum);
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}
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static unsigned long
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x86bsd_dr_get_status (void)
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{
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return x86bsd_dr_get (inferior_ptid, 6);
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}
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static unsigned long
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x86bsd_dr_get_control (void)
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{
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return x86bsd_dr_get (inferior_ptid, 7);
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}
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#endif /* PT_GETDBREGS */
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void _initialize_x86_bsd_nat ();
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void
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_initialize_x86_bsd_nat ()
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{
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#ifdef HAVE_PT_GETDBREGS
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x86_dr_low.set_control = x86bsd_dr_set_control;
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x86_dr_low.set_addr = x86bsd_dr_set_addr;
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x86_dr_low.get_addr = x86bsd_dr_get_addr;
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x86_dr_low.get_status = x86bsd_dr_get_status;
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x86_dr_low.get_control = x86bsd_dr_get_control;
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x86_set_debug_register_length (sizeof (void *));
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#endif /* HAVE_PT_GETDBREGS */
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}
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