gdb/core-sol2.c

   1 /* Machine independent support for Solaris 2 core files for GDB.
   2    Copyright 1994, 2000 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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21
  22 /* Solaris comes with two flavours of core files, cores generated by
  23    an ELF executable and cores generated by programs that were
  24    run under BCP (the part of Solaris which allows it to run SunOS4
  25    a.out files).
  26    This file combines the core register fetching from core-regset.c
  27    and sparc-nat.c to be able to read both flavours.  */
  28
  29 /* for Sparc64 cross Sparc32 */
  30 #define _SYSCALL32
  31 #include "defs.h"
  32
  33 #if defined (__sparcv9)
  34 /* Fails to get included by the Solaris system header files.  */
  35 # include <v9/sys/privregs.h>
  36 #endif
  37
  38 #include <time.h>
  39 #include <sys/types.h>
  40 #include <sys/regset.h>
  41 #include <sys/procfs.h>
  42 #include <fcntl.h>
  43 #include <errno.h>
  44 #include "gdb_string.h"
  45
  46 #include "inferior.h"
  47 #include "target.h"
  48 #include "command.h"
  49 #include "gdbcore.h"
  50
  51 /* Prototypes for supply_gregset etc. */
  52 #include "gregset.h"
  53
  54 static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
  55
  56 /* Fetch registers from core file data pointed to by CORE_REG_SECT.  When
  57    WHICH is 0, the the general register set is fetched; when WHICH is
  58    2, the floating point registers are fetched.  CORE_REG_SIZE is used
  59    to validate the size of the data pointed to by CORE_REG_SECT.  REG_ADDR
  60    is unused. */
  61
  62 static void
  63 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
  64                       CORE_ADDR reg_addr)
  65 {
  66   int i;
  67
  68   if (which == 0)
  69     {
  70       prgregset_t prgregset;
  71
  72       if (core_reg_size == sizeof (prgregset_t))
  73         {
  74           memcpy ((char *) &prgregset, core_reg_sect, sizeof (prgregset));
  75           supply_gregset (&prgregset);
  76         }
  77 #if defined (HAVE_PRGREGSET32_T)
  78       /* 32-bit corefile, 64-bit debugger.  */
  79       else if (core_reg_size == sizeof (prgregset32_t))
  80         {
  81           prgreg32_t *core_gregs;
  82
  83           /* Can't use memcpy here, because the core file contains
  84              32-bit regs; supply_register expects 64-bit regs.  */
  85           core_gregs = (prgreg32_t *) core_reg_sect;
  86           for (i = 0; i < NPRGREG; i++)
  87             prgregset[i] = core_gregs[i];
  88
  89           supply_gregset (&prgregset);
  90         }
  91 #endif /* HAVE_PRGREGSET32_T */
  92       else if (core_reg_size == sizeof (struct regs))
  93         {
  94           struct regs *gregs = (struct regs *) core_reg_sect;
  95
  96           /* G0 *always* holds 0.  */
  97           *(int *) &registers[REGISTER_BYTE (0)] = 0;
  98
  99           /* The globals and output registers.  */
 100           memcpy (&registers[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1,
 101                   15 * REGISTER_RAW_SIZE (G1_REGNUM));
 102           *(int *) &registers[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps;
 103           *(int *) &registers[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc;
 104           *(int *) &registers[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc;
 105           *(int *) &registers[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y;
 106
 107           /* My best guess at where to get the locals and input
 108              registers is exactly where they usually are, right above
 109              the stack pointer.  If the core dump was caused by a bus error
 110              from blowing away the stack pointer (as is possible) then this
 111              won't work, but it's worth the try. */
 112           {
 113             int sp;
 114
 115             sp = *(int *) &registers[REGISTER_BYTE (SP_REGNUM)];
 116             if (0 != target_read_memory (sp,
 117                                       &registers[REGISTER_BYTE (L0_REGNUM)],
 118                                          16 * REGISTER_RAW_SIZE (L0_REGNUM)))
 119               {
 120                 warning ("couldn't read input and local registers from core file\n");
 121               }
 122           }
 123         }
 124       else
 125         {
 126           warning ("wrong size gregset struct in core file");
 127         }
 128     }
 129   else if (which == 2)
 130     {
 131       prfpregset_t prfpregset;
 132
 133       if (core_reg_size == sizeof (prfpregset_t))
 134         {
 135           memcpy ((char *) &prfpregset, core_reg_sect, sizeof (prfpregset));
 136           supply_fpregset (&prfpregset);
 137         }
 138 #if defined (HAVE_PRFPREGSET32_T)
 139       /* 32-bit corefile, 64-bit debugger.  */
 140       else if (core_reg_size == sizeof (prfpregset32_t))
 141         {
 142           prfpregset32_t *core_fpregset;
 143
 144           /* Can't use memcpy here, because the core file contains
 145              32-bit regs; supply_fpregset expects 64-bit regs.  */
 146
 147           core_fpregset = (prfpregset32_t *) core_reg_sect;
 148           for (i = 0; i < 16; i++)
 149             prfpregset.pr_fr.pr_dregs[i] = core_fpregset->pr_fr.pr_dregs[i];
 150           while (i < 32)
 151             prfpregset.pr_fr.pr_dregs[i++] = 0;
 152
 153           prfpregset.pr_fsr         = core_fpregset->pr_fsr;
 154           prfpregset.pr_qcnt        = core_fpregset->pr_qcnt;
 155           prfpregset.pr_q_entrysize = core_fpregset->pr_q_entrysize;
 156           prfpregset.pr_en          = core_fpregset->pr_en;
 157           /* We will not use the pr_q array.  */
 158
 159           supply_fpregset (&prfpregset);
 160         }
 161 #endif /* HAVE_PRFPREGSET32_T */
 162       else if (core_reg_size >= sizeof (struct fpu))
 163         {
 164           struct fpu *fpuregs = (struct fpu *) core_reg_sect;
 165
 166           memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], &fpuregs->fpu_fr,
 167                   sizeof (fpuregs->fpu_fr));
 168           memcpy (&registers[REGISTER_BYTE (FPS_REGNUM)], &fpuregs->fpu_fsr,
 169                   sizeof (FPU_FSR_TYPE));
 170         }
 171       else
 172         {
 173           warning ("wrong size fpregset struct in core file");
 174         }
 175     }
 176 }
 177 \f
 178
 179 /* Register that we are able to handle solaris core file formats. */
 180
 181 static struct core_fns solaris_core_fns =
 182 {
 183   bfd_target_elf_flavour,               /* core_flavour */
 184   default_check_format,                 /* check_format */
 185   default_core_sniffer,                 /* core_sniffer */
 186   fetch_core_registers,                 /* core_read_registers */
 187   NULL                                  /* next */
 188 };
 189
 190 void
 191 _initialize_core_solaris (void)
 192 {
 193   add_core_fns (&solaris_core_fns);
 194 }