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 #include "ppc-tdep.h"
  39
  40 int
  41 kernel_u_size (void)
  42 {
  43   return (sizeof (struct user));
  44 }
  45
  46 /* *INDENT-OFF* */
  47 /* registers layout, as presented by the ptrace interface:
  48 PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5, PT_R6, PT_R7,
  49 PT_R8, PT_R9, PT_R10, PT_R11, PT_R12, PT_R13, PT_R14, PT_R15,
  50 PT_R16, PT_R17, PT_R18, PT_R19, PT_R20, PT_R21, PT_R22, PT_R23,
  51 PT_R24, PT_R25, PT_R26, PT_R27, PT_R28, PT_R29, PT_R30, PT_R31,
  52 PT_FPR0, PT_FPR0 + 2, PT_FPR0 + 4, PT_FPR0 + 6, PT_FPR0 + 8, PT_FPR0 + 10, PT_FPR0 + 12, PT_FPR0 + 14,
  53 PT_FPR0 + 16, PT_FPR0 + 18, PT_FPR0 + 20, PT_FPR0 + 22, PT_FPR0 + 24, PT_FPR0 + 26, PT_FPR0 + 28, PT_FPR0 + 30,
  54 PT_FPR0 + 32, PT_FPR0 + 34, PT_FPR0 + 36, PT_FPR0 + 38, PT_FPR0 + 40, PT_FPR0 + 42, PT_FPR0 + 44, PT_FPR0 + 46,
  55 PT_FPR0 + 48, PT_FPR0 + 50, PT_FPR0 + 52, PT_FPR0 + 54, PT_FPR0 + 56, PT_FPR0 + 58, PT_FPR0 + 60, PT_FPR0 + 62,
  56 PT_NIP, PT_MSR, PT_CCR, PT_LNK, PT_CTR, PT_XER, PT_MQ */
  57 /* *INDENT_ON * */
  58
  59 int
  60 ppc_register_u_addr (int ustart, int regno)
  61 {
  62   int u_addr = -1;
  63
  64   /* General purpose registers occupy 1 slot each in the buffer */
  65   if (regno >= gdbarch_tdep (current_gdbarch)->ppc_gp0_regnum
  66       && regno <= gdbarch_tdep (current_gdbarch)->ppc_gplast_regnum )
  67     u_addr =  (ustart + (PT_R0 + regno) * 4);
  68
  69   /* Floating point regs: 2 slots each */
  70   if (regno >= FP0_REGNUM && regno <= FPLAST_REGNUM)
  71     u_addr = (ustart + (PT_FPR0 + (regno - FP0_REGNUM) * 2) * 4);
  72
  73   /* UISA special purpose registers: 1 slot each */
  74   if (regno == PC_REGNUM)
  75     u_addr = ustart + PT_NIP * 4;
  76   if (regno == gdbarch_tdep (current_gdbarch)->ppc_lr_regnum)
  77     u_addr = ustart + PT_LNK * 4;
  78   if (regno == gdbarch_tdep (current_gdbarch)->ppc_cr_regnum)
  79     u_addr = ustart + PT_CCR * 4;
  80   if (regno == gdbarch_tdep (current_gdbarch)->ppc_xer_regnum)
  81     u_addr = ustart + PT_XER * 4;
  82   if (regno == gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum)
  83     u_addr = ustart + PT_CTR * 4;
  84   if (regno == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum)
  85     u_addr = ustart + PT_MQ * 4;
  86   if (regno == gdbarch_tdep (current_gdbarch)->ppc_ps_regnum)
  87     u_addr = ustart + PT_MSR * 4;
  88
  89   return u_addr;
  90 }
  91
  92 void
  93 supply_gregset (gdb_gregset_t *gregsetp)
  94 {
  95   int regi;
  96   register elf_greg_t *regp = (elf_greg_t *) gregsetp;
  97
  98   for (regi = 0; regi < 32; regi++)
  99     supply_register (regi, (char *) (regp + regi));
 100
 101   supply_register (PC_REGNUM, (char *) (regp + PT_NIP));
 102   supply_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum,
 103                    (char *) (regp + PT_LNK));
 104   supply_register (gdbarch_tdep (current_gdbarch)->ppc_cr_regnum,
 105                    (char *) (regp + PT_CCR));
 106   supply_register (gdbarch_tdep (current_gdbarch)->ppc_xer_regnum,
 107                    (char *) (regp + PT_XER));
 108   supply_register (gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum,
 109                    (char *) (regp + PT_CTR));
 110   supply_register (gdbarch_tdep (current_gdbarch)->ppc_mq_regnum,
 111                    (char *) (regp + PT_MQ));
 112   supply_register (gdbarch_tdep (current_gdbarch)->ppc_ps_regnum,
 113                    (char *) (regp + PT_MSR));
 114
 115 }
 116
 117 void
 118 fill_gregset (gdb_gregset_t *gregsetp, int regno)
 119 {
 120   int regi;
 121   elf_greg_t *regp = (elf_greg_t *) gregsetp;
 122
 123   for (regi = 0; regi < 32; regi++)
 124     {
 125       if ((regno == -1) || regno == regi)
 126         regcache_collect (regi, regp + PT_R0 + regi);
 127     }
 128
 129   if ((regno == -1) || regno == PC_REGNUM)
 130     regcache_collect (PC_REGNUM, regp + PT_NIP);
 131   if ((regno == -1)
 132       || regno == gdbarch_tdep (current_gdbarch)->ppc_lr_regnum)
 133     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum,
 134                       regp + PT_LNK);
 135   if ((regno == -1)
 136       || regno == gdbarch_tdep (current_gdbarch)->ppc_cr_regnum)
 137     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_cr_regnum,
 138                       regp + PT_CCR);
 139   if ((regno == -1)
 140       || regno == gdbarch_tdep (current_gdbarch)->ppc_xer_regnum)
 141     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_xer_regnum,
 142                       regp + PT_XER);
 143   if ((regno == -1)
 144       || regno == gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum)
 145     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum,
 146                       regp + PT_CTR);
 147   if ((regno == -1)
 148       || regno == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum)
 149     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_mq_regnum,
 150                       regp + PT_MQ);
 151   if ((regno == -1)
 152       || regno == gdbarch_tdep (current_gdbarch)->ppc_ps_regnum)
 153     regcache_collect (gdbarch_tdep (current_gdbarch)->ppc_ps_regnum,
 154                       regp + PT_MSR);
 155 }
 156
 157 void
 158 supply_fpregset (gdb_fpregset_t * fpregsetp)
 159 {
 160   int regi;
 161   for (regi = 0; regi < 32; regi++)
 162     {
 163       supply_register (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
 164     }
 165 }
 166
 167 /*  Given a pointer to a floating point register set in /proc format
 168    (fpregset_t *), update the register specified by REGNO from gdb's idea
 169    of the current floating point register set.  If REGNO is -1, update
 170    them all. */
 171
 172 void
 173 fill_fpregset (gdb_fpregset_t *fpregsetp, int regno)
 174 {
 175   int regi;
 176
 177   for (regi = 0; regi < 32; regi++)
 178     {
 179       if ((regno == -1) || (regno == FP0_REGNUM + regi))
 180         regcache_collect (FP0_REGNUM + regi, (char *) (*fpregsetp + regi));
 181     }
 182 }