| 1 | /* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger. |
| 2 | Copyright 1988, 1990, 1991, 1992 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 | #include <sys/types.h> |
| 25 | #include <sys/param.h> |
| 26 | #include <sys/dir.h> |
| 27 | #include <signal.h> |
| 28 | #include "gdbcore.h" |
| 29 | #include <sys/user.h> |
| 30 | |
| 31 | #ifndef USER /* added to support BCS ptrace_user */ |
| 32 | #define USER ptrace_user |
| 33 | #endif |
| 34 | #include <sys/ioctl.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <sys/file.h> |
| 37 | #include <sys/stat.h> |
| 38 | |
| 39 | #include "symtab.h" |
| 40 | #include "setjmp.h" |
| 41 | #include "value.h" |
| 42 | |
| 43 | #ifdef DELTA88 |
| 44 | #include <sys/ptrace.h> |
| 45 | |
| 46 | /* define offsets to the pc instruction offsets in ptrace_user struct */ |
| 47 | #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u) |
| 48 | #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u) |
| 49 | #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u) |
| 50 | #else |
| 51 | /* define offsets to the pc instruction offsets in ptrace_user struct */ |
| 52 | #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u) |
| 53 | #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u) |
| 54 | #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u) |
| 55 | #endif |
| 56 | |
| 57 | extern int have_symbol_file_p(); |
| 58 | |
| 59 | extern jmp_buf stack_jmp; |
| 60 | |
| 61 | extern int errno; |
| 62 | extern char registers[REGISTER_BYTES]; |
| 63 | |
| 64 | void |
| 65 | fetch_inferior_registers (regno) |
| 66 | int regno; /* Original value discarded */ |
| 67 | { |
| 68 | register unsigned int regaddr; |
| 69 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 70 | register int i; |
| 71 | |
| 72 | struct USER u; |
| 73 | unsigned int offset; |
| 74 | |
| 75 | offset = (char *) &u.pt_r0 - (char *) &u; |
| 76 | regaddr = offset; /* byte offset to r0;*/ |
| 77 | |
| 78 | /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */ |
| 79 | for (regno = 0; regno < NUM_REGS; regno++) |
| 80 | { |
| 81 | /*regaddr = register_addr (regno, offset);*/ |
| 82 | /* 88k enhancement */ |
| 83 | |
| 84 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
| 85 | { |
| 86 | *(int *) &buf[i] = ptrace (3, inferior_pid, |
| 87 | (PTRACE_ARG3_TYPE) regaddr, 0); |
| 88 | regaddr += sizeof (int); |
| 89 | } |
| 90 | supply_register (regno, buf); |
| 91 | } |
| 92 | /* now load up registers 36 - 38; special pc registers */ |
| 93 | *(int *) &buf[0] = ptrace (3,inferior_pid, |
| 94 | (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0); |
| 95 | supply_register (SXIP_REGNUM, buf); |
| 96 | *(int *) &buf[0] = ptrace (3, inferior_pid, |
| 97 | (PTRACE_ARG3_TYPE) SNIP_OFFSET,0); |
| 98 | supply_register (SNIP_REGNUM, buf); |
| 99 | *(int *) &buf[0] = ptrace (3, inferior_pid, |
| 100 | (PTRACE_ARG3_TYPE) SFIP_OFFSET,0); |
| 101 | supply_register (SFIP_REGNUM, buf); |
| 102 | } |
| 103 | |
| 104 | /* Store our register values back into the inferior. |
| 105 | If REGNO is -1, do this for all registers. |
| 106 | Otherwise, REGNO specifies which register (so we can save time). */ |
| 107 | |
| 108 | void |
| 109 | store_inferior_registers (regno) |
| 110 | int regno; |
| 111 | { |
| 112 | register unsigned int regaddr; |
| 113 | char buf[80]; |
| 114 | |
| 115 | struct USER u; |
| 116 | |
| 117 | unsigned int offset = (char *) &u.pt_r0 - (char *) &u; |
| 118 | |
| 119 | regaddr = offset; |
| 120 | |
| 121 | /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either |
| 122 | svr3 doesn't run on an 88110, or the kernel isolates the different (not |
| 123 | completely sure this is true, but seems to be. */ |
| 124 | if (regno >= 0) |
| 125 | { |
| 126 | /* regaddr = register_addr (regno, offset); */ |
| 127 | if (regno < PC_REGNUM) |
| 128 | { |
| 129 | regaddr = offset + regno * sizeof (int); |
| 130 | errno = 0; |
| 131 | ptrace (6, inferior_pid, |
| 132 | (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); |
| 133 | if (errno != 0) |
| 134 | { |
| 135 | sprintf (buf, "writing register number %d", regno); |
| 136 | perror_with_name (buf); |
| 137 | } |
| 138 | } |
| 139 | else if (regno == SXIP_REGNUM) |
| 140 | ptrace (6, inferior_pid, |
| 141 | (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno)); |
| 142 | else if (regno == SNIP_REGNUM) |
| 143 | ptrace (6, inferior_pid, |
| 144 | (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno)); |
| 145 | else if (regno == SFIP_REGNUM) |
| 146 | ptrace (6, inferior_pid, |
| 147 | (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno)); |
| 148 | else |
| 149 | printf ("Bad register number for store_inferior routine\n"); |
| 150 | } |
| 151 | else |
| 152 | { |
| 153 | for (regno = 0; regno < PC_REGNUM; regno++) |
| 154 | { |
| 155 | /* regaddr = register_addr (regno, offset); */ |
| 156 | errno = 0; |
| 157 | regaddr = offset + regno * sizeof (int); |
| 158 | ptrace (6, inferior_pid, |
| 159 | (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); |
| 160 | if (errno != 0) |
| 161 | { |
| 162 | sprintf (buf, "writing register number %d", regno); |
| 163 | perror_with_name (buf); |
| 164 | } |
| 165 | } |
| 166 | ptrace (6,inferior_pid, |
| 167 | (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM)); |
| 168 | ptrace (6,inferior_pid, |
| 169 | (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM)); |
| 170 | ptrace (6,inferior_pid, |
| 171 | (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM)); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | |
| 176 | /* blockend is the address of the end of the user structure */ |
| 177 | m88k_register_u_addr (blockend, regnum) |
| 178 | { |
| 179 | struct USER u; |
| 180 | int ustart = blockend - sizeof (struct USER); |
| 181 | switch (regnum) |
| 182 | { |
| 183 | case 0: |
| 184 | case 1: |
| 185 | case 2: |
| 186 | case 3: |
| 187 | case 4: |
| 188 | case 5: |
| 189 | case 6: |
| 190 | case 7: |
| 191 | case 8: |
| 192 | case 9: |
| 193 | case 10: |
| 194 | case 11: |
| 195 | case 12: |
| 196 | case 13: |
| 197 | case 14: |
| 198 | case 15: |
| 199 | case 16: |
| 200 | case 17: |
| 201 | case 18: |
| 202 | case 19: |
| 203 | case 20: |
| 204 | case 21: |
| 205 | case 22: |
| 206 | case 23: |
| 207 | case 24: |
| 208 | case 25: |
| 209 | case 26: |
| 210 | case 27: |
| 211 | case 28: |
| 212 | case 29: |
| 213 | case 30: |
| 214 | case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum); |
| 215 | case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u)); |
| 216 | case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u)); |
| 217 | case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u)); |
| 218 | case SXIP_REGNUM: return (ustart + SXIP_OFFSET); |
| 219 | case SNIP_REGNUM: return (ustart + SNIP_OFFSET); |
| 220 | case SFIP_REGNUM: return (ustart + SFIP_OFFSET); |
| 221 | default: return (blockend + sizeof (REGISTER_TYPE) * regnum); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | #ifdef USE_PROC_FS |
| 226 | |
| 227 | #include <sys/procfs.h> |
| 228 | |
| 229 | /* Given a pointer to a general register set in /proc format (gregset_t *), |
| 230 | unpack the register contents and supply them as gdb's idea of the current |
| 231 | register values. */ |
| 232 | |
| 233 | void |
| 234 | supply_gregset (gregsetp) |
| 235 | gregset_t *gregsetp; |
| 236 | { |
| 237 | register int regi; |
| 238 | register greg_t *regp = (greg_t *) gregsetp; |
| 239 | |
| 240 | for (regi=0; regi <= SP_REGNUM; regi++) |
| 241 | supply_register (regi, (char *) (regp + regi)); |
| 242 | |
| 243 | supply_register (SXIP_REGNUM, (char *) (regp + R_XIP)); |
| 244 | supply_register (SNIP_REGNUM, (char *) (regp + R_NIP)); |
| 245 | supply_register (SFIP_REGNUM, (char *) (regp + R_FIP)); |
| 246 | supply_register (PSR_REGNUM, (char *) (regp + R_PSR)); |
| 247 | supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR)); |
| 248 | supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR)); |
| 249 | } |
| 250 | |
| 251 | void |
| 252 | fill_gregset (gregsetp, regno) |
| 253 | gregset_t *gregsetp; |
| 254 | int regno; |
| 255 | { |
| 256 | int regi; |
| 257 | register greg_t *regp = (greg_t *) gregsetp; |
| 258 | extern char registers[]; |
| 259 | |
| 260 | for (regi = 0 ; regi <= R_R31 ; regi++) |
| 261 | if ((regno == -1) || (regno == regi)) |
| 262 | *(regp + regi) = *(int *) ®isters[REGISTER_BYTE(regi)]; |
| 263 | |
| 264 | if ((regno == -1) || (regno == SXIP_REGNUM)) |
| 265 | *(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE(SXIP_REGNUM)]; |
| 266 | if ((regno == -1) || (regno == SNIP_REGNUM)) |
| 267 | *(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE(SNIP_REGNUM)]; |
| 268 | if ((regno == -1) || (regno == SFIP_REGNUM)) |
| 269 | *(regp + R_FIP) = *(int *) ®isters[REGISTER_BYTE(SFIP_REGNUM)]; |
| 270 | if ((regno == -1) || (regno == PSR_REGNUM)) |
| 271 | *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE(PSR_REGNUM)]; |
| 272 | if ((regno == -1) || (regno == FPSR_REGNUM)) |
| 273 | *(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE(FPSR_REGNUM)]; |
| 274 | if ((regno == -1) || (regno == FPCR_REGNUM)) |
| 275 | *(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE(FPCR_REGNUM)]; |
| 276 | } |
| 277 | |
| 278 | #endif /* USE_PROC_FS */ |