gdb/sun386-nat.c

   1 /* OBSOLETE /* Native support for Sun 386i's for GDB, the GNU debugger. */
   2 /* OBSOLETE    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1995, 1999, 2000, 2001 */
   3 /* OBSOLETE    Free Software Foundation, Inc. */
   4 /* OBSOLETE    Changes for sun386i by Jean Daniel Fekete (jdf@litp.univ-p6-7.fr), */
   5 /* OBSOLETE    C2V Paris, April 89. */
   6 /* OBSOLETE  */
   7 /* OBSOLETE    This file is part of GDB. */
   8 /* OBSOLETE  */
   9 /* OBSOLETE    This program is free software; you can redistribute it and/or modify */
  10 /* OBSOLETE    it under the terms of the GNU General Public License as published by */
  11 /* OBSOLETE    the Free Software Foundation; either version 2 of the License, or */
  12 /* OBSOLETE    (at your option) any later version. */
  13 /* OBSOLETE  */
  14 /* OBSOLETE    This program is distributed in the hope that it will be useful, */
  15 /* OBSOLETE    but WITHOUT ANY WARRANTY; without even the implied warranty of */
  16 /* OBSOLETE    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the */
  17 /* OBSOLETE    GNU General Public License for more details. */
  18 /* OBSOLETE  */
  19 /* OBSOLETE    You should have received a copy of the GNU General Public License */
  20 /* OBSOLETE    along with this program; if not, write to the Free Software */
  21 /* OBSOLETE    Foundation, Inc., 59 Temple Place - Suite 330, */
  22 /* OBSOLETE    Boston, MA 02111-1307, USA.  */ */
  23 /* OBSOLETE  */
  24 /* OBSOLETE #include "defs.h" */
  25 /* OBSOLETE #include "frame.h" */
  26 /* OBSOLETE #include "inferior.h" */
  27 /* OBSOLETE #include "gdbcore.h" */
  28 /* OBSOLETE #include "regcache.h" */
  29 /* OBSOLETE  */
  30 /* OBSOLETE #include <sys/param.h> */
  31 /* OBSOLETE #include <sys/dir.h> */
  32 /* OBSOLETE #include <sys/user.h> */
  33 /* OBSOLETE #include <signal.h> */
  34 /* OBSOLETE #include <sys/ioctl.h> */
  35 /* OBSOLETE #include <fcntl.h> */
  36 /* OBSOLETE  */
  37 /* OBSOLETE #include <sys/ptrace.h> */
  38 /* OBSOLETE #include <machine/reg.h> */
  39 /* OBSOLETE  */
  40 /* OBSOLETE #include <sys/file.h> */
  41 /* OBSOLETE #include "gdb_stat.h" */
  42 /* OBSOLETE #include <sys/core.h> */
  43 /* OBSOLETE \f */
  44 /* OBSOLETE  */
  45 /* OBSOLETE /* Machine-dependent code which would otherwise be in corefile.c */ */
  46 /* OBSOLETE /* Work with core files, for GDB. */ */
  47 /* OBSOLETE \f */
  48 /* OBSOLETE  */
  49 /* OBSOLETE void */
  50 /* OBSOLETE core_file_command (char *filename, int from_tty) */
  51 /* OBSOLETE { */
  52 /* OBSOLETE   int val; */
  53 /* OBSOLETE  */
  54 /* OBSOLETE   /* Discard all vestiges of any previous core file */
  55 /* OBSOLETE      and mark data and stack spaces as empty.  */ */
  56 /* OBSOLETE  */
  57 /* OBSOLETE   if (corefile) */
  58 /* OBSOLETE     xfree (corefile); */
  59 /* OBSOLETE   corefile = 0; */
  60 /* OBSOLETE  */
  61 /* OBSOLETE   if (corechan >= 0) */
  62 /* OBSOLETE     close (corechan); */
  63 /* OBSOLETE   corechan = -1; */
  64 /* OBSOLETE  */
  65 /* OBSOLETE   data_start = 0; */
  66 /* OBSOLETE   data_end = 0; */
  67 /* OBSOLETE   stack_start = STACK_END_ADDR; */
  68 /* OBSOLETE   stack_end = STACK_END_ADDR; */
  69 /* OBSOLETE  */
  70 /* OBSOLETE   /* Now, if a new core file was specified, open it and digest it.  */ */
  71 /* OBSOLETE  */
  72 /* OBSOLETE   if (filename) */
  73 /* OBSOLETE     { */
  74 /* OBSOLETE       filename = tilde_expand (filename); */
  75 /* OBSOLETE       make_cleanup (xfree, filename); */
  76 /* OBSOLETE  */
  77 /* OBSOLETE       if (have_inferior_p ()) */
  78 /* OBSOLETE     error ("To look at a core file, you must kill the program with \"kill\"."); */
  79 /* OBSOLETE       corechan = open (filename, O_RDONLY, 0); */
  80 /* OBSOLETE       if (corechan < 0) */
  81 /* OBSOLETE     perror_with_name (filename); */
  82 /* OBSOLETE  */
  83 /* OBSOLETE       { */
  84 /* OBSOLETE     struct core corestr; */
  85 /* OBSOLETE  */
  86 /* OBSOLETE     val = myread (corechan, &corestr, sizeof corestr); */
  87 /* OBSOLETE     if (val < 0) */
  88 /* OBSOLETE       perror_with_name (filename); */
  89 /* OBSOLETE     if (corestr.c_magic != CORE_MAGIC) */
  90 /* OBSOLETE       error ("\"%s\" does not appear to be a core dump file (magic 0x%x, expected 0x%x)", */
  91 /* OBSOLETE              filename, corestr.c_magic, (int) CORE_MAGIC); */
  92 /* OBSOLETE     else if (sizeof (struct core) != corestr.c_len) */
  93 /* OBSOLETE         error ("\"%s\" has an invalid struct core length (%d, expected %d)", */
  94 /* OBSOLETE                filename, corestr.c_len, (int) sizeof (struct core)); */
  95 /* OBSOLETE  */
  96 /* OBSOLETE     data_start = exec_data_start; */
  97 /* OBSOLETE     data_end = data_start + corestr.c_dsize; */
  98 /* OBSOLETE     stack_start = stack_end - corestr.c_ssize; */
  99 /* OBSOLETE     data_offset = sizeof corestr; */
 100 /* OBSOLETE     stack_offset = sizeof corestr + corestr.c_dsize; */
 101 /* OBSOLETE  */
 102 /* OBSOLETE     memcpy (registers, &corestr.c_regs, sizeof corestr.c_regs); */
 103 /* OBSOLETE  */
 104 /* OBSOLETE     memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], */
 105 /* OBSOLETE             corestr.c_fpu.f_fpstatus.f_st, */
 106 /* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus.f_st); */
 107 /* OBSOLETE     memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)], */
 108 /* OBSOLETE             &corestr.c_fpu.f_fpstatus.f_ctrl, */
 109 /* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus - */
 110 /* OBSOLETE             sizeof corestr.c_fpu.f_fpstatus.f_st); */
 111 /* OBSOLETE  */
 112 /* OBSOLETE     /* the struct aouthdr of sun coff is not the struct exec stored */
 113 /* OBSOLETE        in the core file. */ */
 114 /* OBSOLETE     memcpy (&core_aouthdr, &corestr.c_aouthdr, sizeof (struct exec)); */
 115 /* OBSOLETE #ifndef COFF_ENCAPSULATE */
 116 /* OBSOLETE     core_aouthdr.magic = corestr.c_aouthdr.a_info; */
 117 /* OBSOLETE     core_aouthdr.vstamp = /*SUNVERSION */ 31252; */
 118 /* OBSOLETE #endif */
 119 /* OBSOLETE     printf_unfiltered ("Core file is from \"%s\".\n", corestr.c_cmdname); */
 120 /* OBSOLETE     if (corestr.c_signo > 0) */
 121 /* OBSOLETE       printf_unfiltered ("Program terminated with signal %d, %s.\n", */
 122 /* OBSOLETE                      corestr.c_signo, safe_strsignal (corestr.c_signo)); */
 123 /* OBSOLETE       } */
 124 /* OBSOLETE       if (filename[0] == '/') */
 125 /* OBSOLETE     corefile = savestring (filename, strlen (filename)); */
 126 /* OBSOLETE       else */
 127 /* OBSOLETE     { */
 128 /* OBSOLETE       corefile = concat (current_directory, "/", filename, NULL); */
 129 /* OBSOLETE     } */
 130 /* OBSOLETE  */
 131 /* OBSOLETE       flush_cached_frames (); */
 132 /* OBSOLETE       select_frame (get_current_frame (), 0); */
 133 /* OBSOLETE  */
 134 /* OBSOLETE       validate_files (); */
 135 /* OBSOLETE     } */
 136 /* OBSOLETE   else if (from_tty) */
 137 /* OBSOLETE     printf_unfiltered ("No core file now.\n"); */
 138 /* OBSOLETE } */
 139 /* OBSOLETE  */
 140 /* OBSOLETE i387_to_double (char *from, char *to) */
 141 /* OBSOLETE { */
 142 /* OBSOLETE   long *lp; */
 143 /* OBSOLETE   /* push extended mode on 387 stack, then pop in double mode */
 144 /* OBSOLETE  */
 145 /* OBSOLETE    * first, set exception masks so no error is generated - */
 146 /* OBSOLETE    * number will be rounded to inf or 0, if necessary  */
 147 /* OBSOLETE    */ */
 148 /* OBSOLETE   asm ("pushl %eax");               /* grab a stack slot */ */
 149 /* OBSOLETE   asm ("fstcw (%esp)");             /* get 387 control word */ */
 150 /* OBSOLETE   asm ("movl (%esp),%eax"); /* save old value */ */
 151 /* OBSOLETE   asm ("orl $0x3f,%eax");   /* mask all exceptions */ */
 152 /* OBSOLETE   asm ("pushl %eax"); */
 153 /* OBSOLETE   asm ("fldcw (%esp)");             /* load new value into 387 */ */
 154 /* OBSOLETE  */
 155 /* OBSOLETE   asm ("movl 8(%ebp),%eax"); */
 156 /* OBSOLETE   asm ("fldt (%eax)");              /* push extended number on 387 stack */ */
 157 /* OBSOLETE   asm ("fwait"); */
 158 /* OBSOLETE   asm ("movl 12(%ebp),%eax"); */
 159 /* OBSOLETE   asm ("fstpl (%eax)");             /* pop double */ */
 160 /* OBSOLETE   asm ("fwait"); */
 161 /* OBSOLETE  */
 162 /* OBSOLETE   asm ("popl %eax");                /* flush modified control word */ */
 163 /* OBSOLETE   asm ("fnclex");           /* clear exceptions */ */
 164 /* OBSOLETE   asm ("fldcw (%esp)");             /* restore original control word */ */
 165 /* OBSOLETE   asm ("popl %eax");                /* flush saved copy */ */
 166 /* OBSOLETE } */
 167 /* OBSOLETE  */
 168 /* OBSOLETE double_to_i387 (char *from, char *to) */
 169 /* OBSOLETE { */
 170 /* OBSOLETE   /* push double mode on 387 stack, then pop in extended mode */
 171 /* OBSOLETE    * no errors are possible because every 64-bit pattern */
 172 /* OBSOLETE    * can be converted to an extended */
 173 /* OBSOLETE    */ */
 174 /* OBSOLETE   asm ("movl 8(%ebp),%eax"); */
 175 /* OBSOLETE   asm ("fldl (%eax)"); */
 176 /* OBSOLETE   asm ("fwait"); */
 177 /* OBSOLETE   asm ("movl 12(%ebp),%eax"); */
 178 /* OBSOLETE   asm ("fstpt (%eax)"); */
 179 /* OBSOLETE   asm ("fwait"); */
 180 /* OBSOLETE } */
 181 /* OBSOLETE  */
 182 /* OBSOLETE void */
 183 /* OBSOLETE fetch_inferior_registers (int regno) */
 184 /* OBSOLETE { */
 185 /* OBSOLETE   struct regs inferior_registers; */
 186 /* OBSOLETE   struct fp_state inferior_fp_registers; */
 187 /* OBSOLETE  */
 188 /* OBSOLETE   registers_fetched (); */
 189 /* OBSOLETE  */
 190 /* OBSOLETE   ptrace (PTRACE_GETREGS, inferior_pid, */
 191 /* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_registers); */
 192 /* OBSOLETE   ptrace (PTRACE_GETFPREGS, inferior_pid, */
 193 /* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_fp_registers); */
 194 /* OBSOLETE  */
 195 /* OBSOLETE   memcpy (registers, &inferior_registers, sizeof inferior_registers); */
 196 /* OBSOLETE  */
 197 /* OBSOLETE   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], inferior_fp_registers.f_st, */
 198 /* OBSOLETE       sizeof inferior_fp_registers.f_st); */
 199 /* OBSOLETE   memcpy (&registers[REGISTER_BYTE (FPC_REGNUM)], */
 200 /* OBSOLETE       &inferior_fp_registers.f_ctrl, */
 201 /* OBSOLETE       sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); */
 202 /* OBSOLETE } */
 203 /* OBSOLETE  */
 204 /* OBSOLETE /* Store our register values back into the inferior. */
 205 /* OBSOLETE    If REGNO is -1, do this for all registers. */
 206 /* OBSOLETE    Otherwise, REGNO specifies which register (so we can save time).  */ */
 207 /* OBSOLETE  */
 208 /* OBSOLETE void */
 209 /* OBSOLETE store_inferior_registers (int regno) */
 210 /* OBSOLETE { */
 211 /* OBSOLETE   struct regs inferior_registers; */
 212 /* OBSOLETE   struct fp_state inferior_fp_registers; */
 213 /* OBSOLETE  */
 214 /* OBSOLETE   memcpy (&inferior_registers, registers, 20 * 4); */
 215 /* OBSOLETE  */
 216 /* OBSOLETE   memcpy (inferior_fp_registers.f_st, */
 217 /* OBSOLETE       &registers[REGISTER_BYTE (FP0_REGNUM)], */
 218 /* OBSOLETE       sizeof inferior_fp_registers.f_st); */
 219 /* OBSOLETE   memcpy (&inferior_fp_registers.f_ctrl, */
 220 /* OBSOLETE       &registers[REGISTER_BYTE (FPC_REGNUM)], */
 221 /* OBSOLETE       sizeof inferior_fp_registers - sizeof inferior_fp_registers.f_st); */
 222 /* OBSOLETE  */
 223 /* OBSOLETE #ifdef PTRACE_FP_BUG */
 224 /* OBSOLETE   if (regno == FP_REGNUM || regno == -1) */
 225 /* OBSOLETE     /* Storing the frame pointer requires a gross hack, in which an */
 226 /* OBSOLETE        instruction that moves eax into ebp gets single-stepped.  */ */
 227 /* OBSOLETE     { */
 228 /* OBSOLETE       int stack = inferior_registers.r_reg[SP_REGNUM]; */
 229 /* OBSOLETE       int stuff = ptrace (PTRACE_PEEKDATA, inferior_pid, */
 230 /* OBSOLETE                       (PTRACE_ARG3_TYPE) stack); */
 231 /* OBSOLETE       int reg = inferior_registers.r_reg[EAX]; */
 232 /* OBSOLETE       inferior_registers.r_reg[EAX] = */
 233 /* OBSOLETE     inferior_registers.r_reg[FP_REGNUM]; */
 234 /* OBSOLETE       ptrace (PTRACE_SETREGS, inferior_pid, */
 235 /* OBSOLETE           (PTRACE_ARG3_TYPE) & inferior_registers); */
 236 /* OBSOLETE       ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, */
 237 /* OBSOLETE           0xc589); */
 238 /* OBSOLETE       ptrace (PTRACE_SINGLESTEP, inferior_pid, (PTRACE_ARG3_TYPE) stack, */
 239 /* OBSOLETE           0); */
 240 /* OBSOLETE       wait (0); */
 241 /* OBSOLETE       ptrace (PTRACE_POKEDATA, inferior_pid, (PTRACE_ARG3_TYPE) stack, */
 242 /* OBSOLETE           stuff); */
 243 /* OBSOLETE       inferior_registers.r_reg[EAX] = reg; */
 244 /* OBSOLETE     } */
 245 /* OBSOLETE #endif */
 246 /* OBSOLETE   ptrace (PTRACE_SETREGS, inferior_pid, */
 247 /* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_registers); */
 248 /* OBSOLETE   ptrace (PTRACE_SETFPREGS, inferior_pid, */
 249 /* OBSOLETE       (PTRACE_ARG3_TYPE) & inferior_fp_registers); */
 250 /* OBSOLETE } */