gdb/ppc-linux-nat.c

   1 /* PPC linux native support.
   2    Copyright 1988, 1989, 1991, 1992, 1994, 1996, 2000, 2001
   3    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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "inferior.h"
  24 #include "gdbcore.h"
  25 #include "regcache.h"
  26
  27 #include <sys/types.h>
  28 #include <sys/param.h>
  29 #include <signal.h>
  30 #include <sys/user.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/wait.h>
  33 #include <fcntl.h>
  34 #include <sys/procfs.h>
  35
  36 /* Prototypes for supply_gregset etc. */
  37 #include "gregset.h"
  38
  39 int
  40 kernel_u_size (void)
  41 {
  42   return (sizeof (struct user));
  43 }
  44
  45 static int regmap[] =
  46 {PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
  47  PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
  48  PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
  49  PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
  50  PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
  51  PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
  52  PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
  53  PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
  54  PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ};
  55
  56 int
  57 ppc_register_u_addr (int ustart, int regnum)
  58 {
  59   return (ustart + 4 * regmap[regnum]);
  60 }
  61
  62 void
  63 supply_gregset (gdb_gregset_t *gregsetp)
  64 {
  65   int regi;
  66   register elf_greg_t *regp = (elf_greg_t *) gregsetp;
  67
  68   for (regi = 0; regi < 32; regi++)
  69     supply_register (regi, (char *) (regp + regi));
  70
  71   for (regi = FIRST_UISA_SP_REGNUM; regi <= LAST_UISA_SP_REGNUM; regi++)
  72     supply_register (regi, (char *) (regp + regmap[regi]));
  73 }
  74
  75 void
  76 fill_gregset (gdb_gregset_t *gregsetp, int regno)
  77 {
  78   int regi;
  79   elf_greg_t *regp = (elf_greg_t *) gregsetp;
  80
  81 #define COPY_REG(_idx_,_regi_) \
  82   if ((regno == -1) || regno == _regi_) \
  83     regcache_collect (_regi_, regp + _idx_)
  84
  85   for (regi = 0; regi < 32; regi++)
  86     {
  87       COPY_REG (regmap[regi], regi);
  88     }
  89
  90   for (regi = FIRST_UISA_SP_REGNUM; regi <= LAST_UISA_SP_REGNUM; regi++)
  91     {
  92       COPY_REG (regmap[regi], regi);
  93     }
  94 }
  95
  96 void
  97 supply_fpregset (gdb_fpregset_t * fpregsetp)
  98 {
  99   int regi;
 100   for (regi = 0; regi < 32; regi++)
 101     {
 102       supply_register (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
 103     }
 104 }
 105
 106 /*  Given a pointer to a floating point register set in /proc format
 107    (fpregset_t *), update the register specified by REGNO from gdb's idea
 108    of the current floating point register set.  If REGNO is -1, update
 109    them all. */
 110
 111 void
 112 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
 113 {
 114   int regi;
 115
 116   for (regi = 0; regi < 32; regi++)
 117     {
 118       if ((regno == -1) || (regno == FP0_REGNUM + regi))
 119         regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
 120     }
 121 }