mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
00d7af046f
Rather than using the x86-specific register offset tables, use register maps to describe the layout of the general purpose registers fetched via PT_GETREGS. The sole user-visible difference is that FreeBSD/amd64 will now report additional segment registers ($ds, $es, $fs, and $gs) for both 32-bit and 64-bit processes. As part of these changes, the FreeBSD x86 native targets no longer use amd64-bsd-nat.c or i386-bsd-nat.c. Remove FreeBSD-specific register handling (for $fs_base, $gs_base, and XSAVE state) from these files. Similarly, remove the global x86bsd_xsave_len from x86-bsd-nat.c. The FreeBSD x86 native targets use a static xsave_len instead. While here, rework the probing of PT_GETXMMREGS on FreeBSD/i386. Probe the ptrace op once in the target read_description method and cache the result for the future similar to the way the status of XSAVE support is probed in the read_description method. In addition, return the proper xcr0 mask (X87-only) for old kernels or systems without either XSAVE or XMM support.
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/* Native-dependent code for AMD64 BSD's.
|
||
|
||
Copyright (C) 2003-2022 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 "regcache.h"
|
||
#include "target.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 "amd64-tdep.h"
|
||
#include "amd64-nat.h"
|
||
#include "x86-bsd-nat.h"
|
||
#include "inf-ptrace.h"
|
||
#include "amd64-bsd-nat.h"
|
||
|
||
|
||
static PTRACE_TYPE_RET
|
||
gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr,
|
||
PTRACE_TYPE_ARG4 data)
|
||
{
|
||
#ifdef __NetBSD__
|
||
gdb_assert (data == 0);
|
||
/* Support for NetBSD threads: unlike other ptrace implementations in this
|
||
file, NetBSD requires that we pass both the pid and lwp. */
|
||
return ptrace (request, ptid.pid (), addr, ptid.lwp ());
|
||
#else
|
||
pid_t pid = get_ptrace_pid (ptid);
|
||
return ptrace (request, pid, addr, data);
|
||
#endif
|
||
}
|
||
|
||
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
|
||
for all registers (including the floating-point registers). */
|
||
|
||
void
|
||
amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = regcache->arch ();
|
||
ptid_t ptid = regcache->ptid ();
|
||
|
||
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
|
||
{
|
||
struct reg regs;
|
||
|
||
if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
amd64_supply_native_gregset (regcache, ®s, -1);
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
|
||
if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
|
||
{
|
||
struct fpreg fpregs;
|
||
|
||
if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
amd64_supply_fxsave (regcache, -1, &fpregs);
|
||
}
|
||
}
|
||
|
||
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
|
||
this for all registers (including the floating-point registers). */
|
||
|
||
void
|
||
amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
|
||
{
|
||
struct gdbarch *gdbarch = regcache->arch ();
|
||
ptid_t ptid = regcache->ptid ();
|
||
|
||
if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
|
||
{
|
||
struct reg regs;
|
||
|
||
if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't get registers"));
|
||
|
||
amd64_collect_native_gregset (regcache, ®s, regnum);
|
||
|
||
if (gdb_ptrace (PT_SETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
|
||
perror_with_name (_("Couldn't write registers"));
|
||
|
||
if (regnum != -1)
|
||
return;
|
||
}
|
||
|
||
if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
|
||
{
|
||
struct fpreg fpregs;
|
||
|
||
if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't get floating point status"));
|
||
|
||
amd64_collect_fxsave (regcache, regnum, &fpregs);
|
||
|
||
if (gdb_ptrace (PT_SETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
|
||
perror_with_name (_("Couldn't write floating point status"));
|
||
}
|
||
}
|