gdb/ppc-linux-nat.c

   1 /* PPC linux native support.
   2    Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "defs.h"
  21 #include "frame.h"
  22 #include "inferior.h"
  23 #include "gdbcore.h"
  24
  25 #include <sys/types.h>
  26 #include <sys/param.h>
  27 #include <signal.h>
  28 #include <sys/user.h>
  29 #include <sys/ioctl.h>
  30 #include <sys/wait.h>
  31 #include <fcntl.h>
  32 #include <sys/procfs.h>
  33
  34 /* Prototypes for supply_gregset etc. */
  35 #include "gregset.h"
  36
  37 int
  38 kernel_u_size (void)
  39 {
  40   return (sizeof (struct user));
  41 }
  42
  43 static int regmap[] =
  44 {PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
  45  PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
  46  PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
  47  PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
  48  PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
  49  PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
  50  PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
  51  PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
  52  PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ};
  53
  54 int
  55 ppc_register_u_addr (int ustart, int regnum)
  56 {
  57   return (ustart + 4 * regmap[regnum]);
  58 }
  59
  60 void
  61 supply_gregset (gdb_gregset_t *gregsetp)
  62 {
  63   int regi;
  64   register greg_t *regp = (greg_t *) gregsetp;
  65
  66   for (regi = 0; regi < 32; regi++)
  67     supply_register (regi, (char *) (regp + regi));
  68
  69   for (regi = FIRST_UISA_SP_REGNUM; regi <= LAST_UISA_SP_REGNUM; regi++)
  70     supply_register (regi, (char *) (regp + regmap[regi]));
  71 }
  72
  73 void
  74 fill_gregset (gdb_gregset_t *gregsetp, int regno)
  75 {
  76   int regi;
  77   greg_t *regp = (greg_t *) gregsetp;
  78
  79 #define COPY_REG(_idx_,_regi_) \
  80   if ((regno == -1) || regno == _regi_) \
  81     memcpy (regp + _idx_, &registers[REGISTER_BYTE (_regi_)], \
  82             REGISTER_RAW_SIZE (_regi_))
  83
  84   for (regi = 0; regi < 32; regi++)
  85     {
  86       COPY_REG (regmap[regi], regi);
  87     }
  88
  89   for (regi = FIRST_UISA_SP_REGNUM; regi <= LAST_UISA_SP_REGNUM; regi++)
  90     {
  91       COPY_REG (regmap[regi], regi);
  92     }
  93 }
  94
  95 void
  96 supply_fpregset (gdb_fpregset_t * fpregsetp)
  97 {
  98   int regi;
  99   for (regi = 0; regi < 32; regi++)
 100     {
 101       supply_register (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
 102     }
 103 }
 104
 105 /*  Given a pointer to a floating point register set in /proc format
 106    (fpregset_t *), update the register specified by REGNO from gdb's idea
 107    of the current floating point register set.  If REGNO is -1, update
 108    them all. */
 109
 110 void
 111 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
 112 {
 113   int regi;
 114   char *to;
 115   char *from;
 116
 117   for (regi = 0; regi < 32; regi++)
 118     {
 119       if ((regno == -1) || (regno == FP0_REGNUM + regi))
 120         {
 121           from = (char *) &registers[REGISTER_BYTE (FP0_REGNUM + regi)];
 122           to = (char *) (*fpregsetp + regi);
 123           memcpy (to, from, REGISTER_RAW_SIZE (FP0_REGNUM + regi));
 124         }
 125     }
 126 }