gdb/alpha-linux-nat.c

   1 /* Low level Alpha GNU/Linux interface, for GDB when running native.
   2    Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19    Boston, MA 02110-1301, USA.  */
  20
  21 #include "defs.h"
  22 #include "target.h"
  23 #include "linux-nat.h"
  24
  25 #include "alpha-tdep.h"
  26
  27 #include <sys/ptrace.h>
  28 #include <alpha/ptrace.h>
  29
  30 #include <sys/procfs.h>
  31 #include "gregset.h"
  32
  33 /* The address of UNIQUE for ptrace.  */
  34 #define ALPHA_UNIQUE_PTRACE_ADDR 65
  35
  36
  37 /*
  38  * See the comment in m68k-tdep.c regarding the utility of these functions.
  39  */
  40
  41 void
  42 supply_gregset (gdb_gregset_t *gregsetp)
  43 {
  44   long *regp = (long *)gregsetp;
  45
  46   /* PC is in slot 32, UNIQUE is in slot 33.  */
  47   alpha_supply_int_regs (-1, regp, regp + 31, regp + 32);
  48 }
  49
  50 void
  51 fill_gregset (gdb_gregset_t *gregsetp, int regno)
  52 {
  53   long *regp = (long *)gregsetp;
  54
  55   /* PC is in slot 32, UNIQUE is in slot 33.  */
  56   alpha_fill_int_regs (regno, regp, regp + 31, regp + 32);
  57 }
  58
  59 /*
  60  * Now we do the same thing for floating-point registers.
  61  * Again, see the comments in m68k-tdep.c.
  62  */
  63
  64 void
  65 supply_fpregset (gdb_fpregset_t *fpregsetp)
  66 {
  67   long *regp = (long *)fpregsetp;
  68
  69   /* FPCR is in slot 32.  */
  70   alpha_supply_fp_regs (-1, regp, regp + 31);
  71 }
  72
  73 void
  74 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
  75 {
  76   long *regp = (long *)fpregsetp;
  77
  78   /* FPCR is in slot 32.  */
  79   alpha_fill_fp_regs (regno, regp, regp + 31);
  80 }
  81
  82
  83 static CORE_ADDR
  84 alpha_linux_register_u_offset (int regno)
  85 {
  86   if (regno == PC_REGNUM)
  87     return PC;
  88   if (regno == ALPHA_UNIQUE_REGNUM)
  89     return ALPHA_UNIQUE_PTRACE_ADDR;
  90   if (regno < FP0_REGNUM)
  91     return GPR_BASE + regno;
  92   else
  93     return FPR_BASE + regno - FP0_REGNUM;
  94 }
  95
  96 void _initialialize_alpha_linux_nat (void);
  97
  98 void
  99 _initialize_alpha_linux_nat (void)
 100 {
 101   linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset));
 102 }