| 1 | /* Host-dependent Motorola 88xxx support for GDB, the GNU Debugger. |
| 2 | Copyright 1988, 1990, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "frame.h" |
| 22 | #include "inferior.h" |
| 23 | |
| 24 | #ifdef USG |
| 25 | #include <sys/types.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <sys/param.h> |
| 29 | #include <sys/dir.h> |
| 30 | #include <signal.h> |
| 31 | #include "gdbcore.h" |
| 32 | #include <sys/user.h> |
| 33 | |
| 34 | #ifndef USER /* added to support BCS ptrace_user */ |
| 35 | #define USER ptrace_user |
| 36 | #endif |
| 37 | #include <sys/ioctl.h> |
| 38 | #include <fcntl.h> |
| 39 | #include <sys/file.h> |
| 40 | #include <sys/stat.h> |
| 41 | |
| 42 | #include "symtab.h" |
| 43 | #include "setjmp.h" |
| 44 | #include "value.h" |
| 45 | |
| 46 | #ifdef DELTA88 |
| 47 | #include <sys/ptrace.h> |
| 48 | |
| 49 | /* define offsets to the pc instruction offsets in ptrace_user struct */ |
| 50 | #define SXIP_OFFSET (char *)&u.pt_sigframe.sig_sxip - (char *)&u |
| 51 | #define SNIP_OFFSET (char *)&u.pt_sigframe.sig_snip - (char *)&u |
| 52 | #define SFIP_OFFSET (char *)&u.pt_sigframe.sig_sfip - (char *)&u |
| 53 | #else |
| 54 | /* define offsets to the pc instruction offsets in ptrace_user struct */ |
| 55 | #define SXIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u |
| 56 | #define SNIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u |
| 57 | #define SFIP_OFFSET (char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u |
| 58 | #endif |
| 59 | |
| 60 | extern int have_symbol_file_p(); |
| 61 | |
| 62 | extern jmp_buf stack_jmp; |
| 63 | |
| 64 | extern int errno; |
| 65 | extern char registers[REGISTER_BYTES]; |
| 66 | \f |
| 67 | void |
| 68 | fetch_inferior_registers (regno) |
| 69 | int regno; /* Original value discarded */ |
| 70 | { |
| 71 | register unsigned int regaddr; |
| 72 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 73 | register int i; |
| 74 | |
| 75 | struct USER u; |
| 76 | unsigned int offset; |
| 77 | |
| 78 | offset = (char *) &u.pt_r0 - (char *) &u; |
| 79 | regaddr = offset; /* byte offset to r0;*/ |
| 80 | |
| 81 | /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */ |
| 82 | for (regno = 0; regno < NUM_REGS; regno++) |
| 83 | { |
| 84 | /*regaddr = register_addr (regno, offset);*/ |
| 85 | /* 88k enhancement */ |
| 86 | |
| 87 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
| 88 | { |
| 89 | *(int *) &buf[i] = ptrace (3, inferior_pid, |
| 90 | (PTRACE_ARG3_TYPE) regaddr, 0); |
| 91 | regaddr += sizeof (int); |
| 92 | } |
| 93 | supply_register (regno, buf); |
| 94 | } |
| 95 | /* now load up registers 36 - 38; special pc registers */ |
| 96 | *(int *) &buf[0] = ptrace (3,inferior_pid, |
| 97 | (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0); |
| 98 | supply_register (SXIP_REGNUM, buf); |
| 99 | *(int *) &buf[0] = ptrace (3, inferior_pid, |
| 100 | (PTRACE_ARG3_TYPE) SNIP_OFFSET,0); |
| 101 | supply_register (SNIP_REGNUM, buf); |
| 102 | *(int *) &buf[0] = ptrace (3, inferior_pid, |
| 103 | (PTRACE_ARG3_TYPE) SFIP_OFFSET,0); |
| 104 | supply_register (SFIP_REGNUM, buf); |
| 105 | } |
| 106 | |
| 107 | /* Store our register values back into the inferior. |
| 108 | If REGNO is -1, do this for all registers. |
| 109 | Otherwise, REGNO specifies which register (so we can save time). */ |
| 110 | |
| 111 | void |
| 112 | store_inferior_registers (regno) |
| 113 | int regno; |
| 114 | { |
| 115 | register unsigned int regaddr; |
| 116 | char buf[80]; |
| 117 | |
| 118 | struct USER u; |
| 119 | |
| 120 | |
| 121 | unsigned int offset = (char *) &u.pt_r0 - (char *) &u; |
| 122 | |
| 123 | regaddr = offset; |
| 124 | |
| 125 | if (regno >= 0) |
| 126 | { |
| 127 | /* regaddr = register_addr (regno, offset); */ |
| 128 | if (regno < PC_REGNUM) |
| 129 | { |
| 130 | regaddr = offset + regno * sizeof (int); |
| 131 | errno = 0; |
| 132 | ptrace (6, inferior_pid, |
| 133 | (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); |
| 134 | if (errno != 0) |
| 135 | { |
| 136 | sprintf (buf, "writing register number %d", regno); |
| 137 | perror_with_name (buf); |
| 138 | } |
| 139 | } |
| 140 | else if (regno == SXIP_REGNUM) |
| 141 | ptrace (6, inferior_pid, |
| 142 | (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno)); |
| 143 | else if (regno == SNIP_REGNUM) |
| 144 | ptrace (6, inferior_pid, |
| 145 | (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno)); |
| 146 | else if (regno == SFIP_REGNUM) |
| 147 | ptrace (6, inferior_pid, |
| 148 | (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno)); |
| 149 | else printf ("Bad register number for store_inferior routine\n"); |
| 150 | } |
| 151 | else { |
| 152 | for (regno = 0; regno < NUM_REGS - 3; regno++) |
| 153 | { |
| 154 | /* regaddr = register_addr (regno, offset); */ |
| 155 | errno = 0; |
| 156 | regaddr = offset + regno * sizeof (int); |
| 157 | ptrace (6, inferior_pid, |
| 158 | (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); |
| 159 | if (errno != 0) |
| 160 | { |
| 161 | sprintf (buf, "writing register number %d", regno); |
| 162 | perror_with_name (buf); |
| 163 | } |
| 164 | } |
| 165 | ptrace (6,inferior_pid, |
| 166 | (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM)); |
| 167 | ptrace (6,inferior_pid, |
| 168 | (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM)); |
| 169 | ptrace (6,inferior_pid, |
| 170 | (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM)); |
| 171 | } |
| 172 | |
| 173 | |
| 174 | } |
| 175 | |
| 176 | #if 0 |
| 177 | /* Core files are now a function of BFD. */ |
| 178 | \f |
| 179 | void |
| 180 | core_file_command (filename, from_tty) |
| 181 | char *filename; |
| 182 | int from_tty; |
| 183 | { |
| 184 | int val; |
| 185 | extern char registers[]; |
| 186 | |
| 187 | /* Need symbol file and one with tdesc info for corefiles to work */ |
| 188 | if (!have_symbol_file_p()) |
| 189 | error ("Requires symbol-file and exec-file"); |
| 190 | if (!execfile) |
| 191 | error ("Requires exec-file and symbol-file"); |
| 192 | |
| 193 | /* Discard all vestiges of any previous core file |
| 194 | and mark data and stack spaces as empty. */ |
| 195 | |
| 196 | if (corefile) |
| 197 | free (corefile); |
| 198 | corefile = 0; |
| 199 | |
| 200 | if (corechan >= 0) |
| 201 | close (corechan); |
| 202 | corechan = -1; |
| 203 | |
| 204 | data_start = 0; |
| 205 | data_end = 0; |
| 206 | stack_start = STACK_END_ADDR; |
| 207 | stack_end = STACK_END_ADDR; |
| 208 | |
| 209 | /* Now, if a new core file was specified, open it and digest it. */ |
| 210 | |
| 211 | if (filename) |
| 212 | { |
| 213 | filename = tilde_expand (filename); |
| 214 | make_cleanup (free, filename); |
| 215 | |
| 216 | if (have_inferior_p ()) |
| 217 | error ("To look at a core file, you must kill the inferior with \"kill\"."); |
| 218 | corechan = open (filename, O_RDONLY, 0); |
| 219 | if (corechan < 0) |
| 220 | perror_with_name (filename); |
| 221 | /* 4.2-style (and perhaps also sysV-style) core dump file. */ |
| 222 | { |
| 223 | struct USER u; |
| 224 | |
| 225 | int reg_offset; |
| 226 | |
| 227 | val = myread (corechan, &u, sizeof u); |
| 228 | if (val < 0) |
| 229 | perror_with_name (filename); |
| 230 | data_start = u.pt_o_data_start; |
| 231 | |
| 232 | data_end = data_start + u.pt_dsize; |
| 233 | stack_start = stack_end - u.pt_ssize; |
| 234 | data_offset = u.pt_dataptr; |
| 235 | stack_offset = data_offset + u.pt_dsize; |
| 236 | |
| 237 | #if defined(BCS) |
| 238 | #if defined(DGUX) |
| 239 | |
| 240 | reg_offset = 2048; |
| 241 | |
| 242 | |
| 243 | #endif /* defined (DGUX) */ |
| 244 | #else |
| 245 | |
| 246 | /* original code: */ |
| 247 | reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR; |
| 248 | |
| 249 | #endif /* defined(BCS) */ |
| 250 | |
| 251 | /* I don't know where to find this info. |
| 252 | So, for now, mark it as not available. */ |
| 253 | /* N_SET_MAGIC (core_aouthdr, 0); */ |
| 254 | bzero ((char *) &core_aouthdr, sizeof core_aouthdr); |
| 255 | |
| 256 | /* Read the register values out of the core file and store |
| 257 | them where `read_register' will find them. */ |
| 258 | |
| 259 | { |
| 260 | register int regno; |
| 261 | |
| 262 | for (regno = 0; regno < NUM_REGS; regno++) |
| 263 | { |
| 264 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 265 | |
| 266 | val = lseek (corechan, register_addr (regno, reg_offset), 0); |
| 267 | if (val < 0) |
| 268 | perror_with_name (filename); |
| 269 | |
| 270 | val = myread (corechan, buf, sizeof buf); |
| 271 | if (val < 0) |
| 272 | perror_with_name (filename); |
| 273 | supply_register (regno, buf); |
| 274 | } |
| 275 | } |
| 276 | } |
| 277 | if (filename[0] == '/') |
| 278 | corefile = savestring (filename, strlen (filename)); |
| 279 | else |
| 280 | { |
| 281 | corefile = concat (current_directory, "/", filename, NULL); |
| 282 | } |
| 283 | init_tdesc(); |
| 284 | current_context = init_dcontext(); |
| 285 | set_current_frame ( create_new_frame(get_frame_base (read_pc()), |
| 286 | read_pc ())); |
| 287 | select_frame (get_current_frame (), 0); |
| 288 | validate_files (); |
| 289 | } |
| 290 | else if (from_tty) |
| 291 | printf ("No core file now.\n"); |
| 292 | } |
| 293 | #endif |
| 294 | \f |
| 295 | /* blockend is the address of the end of the user structure */ |
| 296 | m88k_register_u_addr (blockend, regnum) |
| 297 | { |
| 298 | struct USER u; |
| 299 | int ustart = blockend - sizeof (struct USER); |
| 300 | switch (regnum) |
| 301 | { |
| 302 | case 0: |
| 303 | case 1: |
| 304 | case 2: |
| 305 | case 3: |
| 306 | case 4: |
| 307 | case 5: |
| 308 | case 6: |
| 309 | case 7: |
| 310 | case 8: |
| 311 | case 9: |
| 312 | case 10: |
| 313 | case 11: |
| 314 | case 12: |
| 315 | case 13: |
| 316 | case 14: |
| 317 | case 15: |
| 318 | case 16: |
| 319 | case 17: |
| 320 | case 18: |
| 321 | case 19: |
| 322 | case 20: |
| 323 | case 21: |
| 324 | case 22: |
| 325 | case 23: |
| 326 | case 24: |
| 327 | case 25: |
| 328 | case 26: |
| 329 | case 27: |
| 330 | case 28: |
| 331 | case 29: |
| 332 | case 30: |
| 333 | case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum); |
| 334 | case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u)); |
| 335 | case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u)); |
| 336 | case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u)); |
| 337 | case SXIP_REGNUM: return (ustart + SXIP_OFFSET); |
| 338 | case SNIP_REGNUM: return (ustart + SNIP_OFFSET); |
| 339 | case SFIP_REGNUM: return (ustart + SFIP_OFFSET); |
| 340 | default: return (blockend + sizeof (REGISTER_TYPE) * regnum); |
| 341 | } |
| 342 | } |