gdb/amd64-bsd-nat.c

   1 /* Native-dependent code for AMD64 BSD's.
   2
   3    Copyright (C) 2003-2024 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 "inferior.h"
  21 #include "regcache.h"
  22 #include "target.h"
  23
  24 /* We include <signal.h> to make sure `struct fxsave64' is defined on
  25    NetBSD, since NetBSD's <machine/reg.h> needs it.  */
  26 #include <signal.h>
  27 #include <sys/types.h>
  28 #include <sys/ptrace.h>
  29 #include <machine/reg.h>
  30
  31 #include "amd64-tdep.h"
  32 #include "amd64-nat.h"
  33 #include "x86-bsd-nat.h"
  34 #include "inf-ptrace.h"
  35 #include "amd64-bsd-nat.h"
  36 \f
  37
  38 static PTRACE_TYPE_RET
  39 gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr,
  40             PTRACE_TYPE_ARG4 data)
  41 {
  42 #ifdef __NetBSD__
  43   gdb_assert (data == 0);
  44   /* Support for NetBSD threads: unlike other ptrace implementations in this
  45      file, NetBSD requires that we pass both the pid and lwp.  */
  46   return ptrace (request, ptid.pid (), addr, ptid.lwp ());
  47 #else
  48   pid_t pid = get_ptrace_pid (ptid);
  49   return ptrace (request, pid, addr, data);
  50 #endif
  51 }
  52
  53 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  54    for all registers (including the floating-point registers).  */
  55
  56 void
  57 amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
  58 {
  59   struct gdbarch *gdbarch = regcache->arch ();
  60   ptid_t ptid = regcache->ptid ();
  61
  62   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  63     {
  64       struct reg regs;
  65
  66       if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  67         perror_with_name (_("Couldn't get registers"));
  68
  69       amd64_supply_native_gregset (regcache, &regs, -1);
  70       if (regnum != -1)
  71         return;
  72     }
  73
  74   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
  75     {
  76       struct fpreg fpregs;
  77
  78       if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
  79         perror_with_name (_("Couldn't get floating point status"));
  80
  81       amd64_supply_fxsave (regcache, -1, &fpregs);
  82     }
  83 }
  84
  85 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  86    this for all registers (including the floating-point registers).  */
  87
  88 void
  89 amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
  90 {
  91   struct gdbarch *gdbarch = regcache->arch ();
  92   ptid_t ptid = regcache->ptid ();
  93
  94   if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
  95     {
  96       struct reg regs;
  97
  98       if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  99         perror_with_name (_("Couldn't get registers"));
 100
 101       amd64_collect_native_gregset (regcache, &regs, regnum);
 102
 103       if (gdb_ptrace (PT_SETREGS, ptid, (PTRACE_TYPE_ARG3) &regs, 0) == -1)
 104         perror_with_name (_("Couldn't write registers"));
 105
 106       if (regnum != -1)
 107         return;
 108     }
 109
 110   if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
 111     {
 112       struct fpreg fpregs;
 113
 114       if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 115         perror_with_name (_("Couldn't get floating point status"));
 116
 117       amd64_collect_fxsave (regcache, regnum, &fpregs);
 118
 119       if (gdb_ptrace (PT_SETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
 120         perror_with_name (_("Couldn't write floating point status"));
 121     }
 122 }