gdb/amd64-bsd-nat.c

   1 /* Native-dependent code for AMD64 BSD's.
   2
   3    Copyright (C) 2003-2022 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22 #include "regcache.h"
  23 #include "target.h"
  24
  25 /* We include <signal.h> to make sure `struct fxsave64' is defined on
  26    NetBSD, since NetBSD's <machine/reg.h> needs it.  */
  27 #include <signal.h>
  28 #include <sys/types.h>
  29 #include <sys/ptrace.h>
  30 #include <machine/reg.h>
  31
  32 #include "amd64-tdep.h"
  33 #include "amd64-nat.h"
  34 #include "x86-bsd-nat.h"
  35 #include "inf-ptrace.h"
  36 #include "amd64-bsd-nat.h"
  37 \f
  38
  39 static PTRACE_TYPE_RET
  40 gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr,
  41             PTRACE_TYPE_ARG4 data)
  42 {
  43 #ifdef __NetBSD__
  44   gdb_assert (data == 0);
  45   /* Support for NetBSD threads: unlike other ptrace implementations in this
  46      file, NetBSD requires that we pass both the pid and lwp.  */
  47   return ptrace (request, ptid.pid (), addr, ptid.lwp ());
  48 #else
  49   pid_t pid = get_ptrace_pid (ptid);
  50   return ptrace (request, pid, addr, data);
  51 #endif
  52 }
  53
  54 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  55    for all registers (including the floating-point registers).  */
  56
  57 void
  58 amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
  59 {
  60   struct gdbarch *gdbarch = regcache->arch ();
  61   ptid_t ptid = regcache->ptid ();
  62
  63   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  64     {
  65       struct reg regs;
  66
  67       if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  68         perror_with_name (_("Couldn't get registers"));
  69
  70       amd64_supply_native_gregset (regcache, &regs, -1);
  71       if (regnum != -1)
  72         return;
  73     }
  74
  75   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
  76     {
  77       struct fpreg fpregs;
  78
  79       if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  80         perror_with_name (_("Couldn't get floating point status"));
  81
  82       amd64_supply_fxsave (regcache, -1, &fpregs);
  83     }
  84 }
  85
  86 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  87    this for all registers (including the floating-point registers).  */
  88
  89 void
  90 amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
  91 {
  92   struct gdbarch *gdbarch = regcache->arch ();
  93   ptid_t ptid = regcache->ptid ();
  94
  95   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  96     {
  97       struct reg regs;
  98
  99       if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 100         perror_with_name (_("Couldn't get registers"));
 101
 102       amd64_collect_native_gregset (regcache, &regs, regnum);
 103
 104       if (gdb_ptrace (PT_SETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 105         perror_with_name (_("Couldn't write registers"));
 106
 107       if (regnum != -1)
 108         return;
 109     }
 110
 111   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
 112     {
 113       struct fpreg fpregs;
 114
 115       if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 116         perror_with_name (_("Couldn't get floating point status"));
 117
 118       amd64_collect_fxsave (regcache, regnum, &fpregs);
 119
 120       if (gdb_ptrace (PT_SETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 121         perror_with_name (_("Couldn't write floating point status"));
 122     }
 123 }