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 "regcache.h"
  24 #include "linux-nat.h"
  25
  26 #include "alpha-tdep.h"
  27
  28 #include <sys/ptrace.h>
  29 #include <alpha/ptrace.h>
  30
  31 #include <sys/procfs.h>
  32 #include "gregset.h"
  33
  34 /* The address of UNIQUE for ptrace.  */
  35 #define ALPHA_UNIQUE_PTRACE_ADDR 65
  36
  37
  38 /*
  39  * See the comment in m68k-tdep.c regarding the utility of these functions.
  40  */
  41
  42 void
  43 supply_gregset (gdb_gregset_t *gregsetp)
  44 {
  45   long *regp = (long *)gregsetp;
  46
  47   /* PC is in slot 32, UNIQUE is in slot 33.  */
  48   alpha_supply_int_regs (current_regcache, -1, regp, regp + 31, regp + 32);
  49 }
  50
  51 void
  52 fill_gregset (gdb_gregset_t *gregsetp, int regno)
  53 {
  54   long *regp = (long *)gregsetp;
  55
  56   /* PC is in slot 32, UNIQUE is in slot 33.  */
  57   alpha_fill_int_regs (current_regcache, regno, regp, regp + 31, regp + 32);
  58 }
  59
  60 /*
  61  * Now we do the same thing for floating-point registers.
  62  * Again, see the comments in m68k-tdep.c.
  63  */
  64
  65 void
  66 supply_fpregset (gdb_fpregset_t *fpregsetp)
  67 {
  68   long *regp = (long *)fpregsetp;
  69
  70   /* FPCR is in slot 32.  */
  71   alpha_supply_fp_regs (current_regcache, -1, regp, regp + 31);
  72 }
  73
  74 void
  75 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
  76 {
  77   long *regp = (long *)fpregsetp;
  78
  79   /* FPCR is in slot 32.  */
  80   alpha_fill_fp_regs (current_regcache, regno, regp, regp + 31);
  81 }
  82
  83
  84 static CORE_ADDR
  85 alpha_linux_register_u_offset (int regno)
  86 {
  87   if (regno == PC_REGNUM)
  88     return PC;
  89   if (regno == ALPHA_UNIQUE_REGNUM)
  90     return ALPHA_UNIQUE_PTRACE_ADDR;
  91   if (regno < FP0_REGNUM)
  92     return GPR_BASE + regno;
  93   else
  94     return FPR_BASE + regno - FP0_REGNUM;
  95 }
  96
  97 void _initialialize_alpha_linux_nat (void);
  98
  99 void
 100 _initialize_alpha_linux_nat (void)
 101 {
 102   linux_nat_add_target (linux_trad_target (alpha_linux_register_u_offset));
 103 }