| 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 | #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 | |
| 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 | |
| 177 | /* blockend is the address of the end of the user structure */ |
| 178 | m88k_register_u_addr (blockend, regnum) |
| 179 | { |
| 180 | struct USER u; |
| 181 | int ustart = blockend - sizeof (struct USER); |
| 182 | switch (regnum) |
| 183 | { |
| 184 | case 0: |
| 185 | case 1: |
| 186 | case 2: |
| 187 | case 3: |
| 188 | case 4: |
| 189 | case 5: |
| 190 | case 6: |
| 191 | case 7: |
| 192 | case 8: |
| 193 | case 9: |
| 194 | case 10: |
| 195 | case 11: |
| 196 | case 12: |
| 197 | case 13: |
| 198 | case 14: |
| 199 | case 15: |
| 200 | case 16: |
| 201 | case 17: |
| 202 | case 18: |
| 203 | case 19: |
| 204 | case 20: |
| 205 | case 21: |
| 206 | case 22: |
| 207 | case 23: |
| 208 | case 24: |
| 209 | case 25: |
| 210 | case 26: |
| 211 | case 27: |
| 212 | case 28: |
| 213 | case 29: |
| 214 | case 30: |
| 215 | case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum); |
| 216 | case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u)); |
| 217 | case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u)); |
| 218 | case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u)); |
| 219 | case SXIP_REGNUM: return (ustart + SXIP_OFFSET); |
| 220 | case SNIP_REGNUM: return (ustart + SNIP_OFFSET); |
| 221 | case SFIP_REGNUM: return (ustart + SFIP_OFFSET); |
| 222 | default: return (blockend + sizeof (REGISTER_TYPE) * regnum); |
| 223 | } |
| 224 | } |
| 225 | |