| 1 | /* HP/UX native interface for HP 300's, for GDB when running under Unix. |
| 2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993 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 | #include "defs.h" |
| 22 | #include "frame.h" |
| 23 | #include "inferior.h" |
| 24 | |
| 25 | /* Defining this means some system include files define some extra stuff. */ |
| 26 | #define WOPR |
| 27 | #include <sys/param.h> |
| 28 | #include <signal.h> |
| 29 | #include <sys/user.h> |
| 30 | #include <fcntl.h> |
| 31 | |
| 32 | #include <sys/ptrace.h> |
| 33 | #include <sys/reg.h> |
| 34 | #include <sys/trap.h> |
| 35 | |
| 36 | #include <sys/file.h> |
| 37 | |
| 38 | static void |
| 39 | fetch_inferior_register PARAMS ((int, unsigned int)); |
| 40 | |
| 41 | static void |
| 42 | store_inferior_register_1 PARAMS ((int, unsigned int, int)); |
| 43 | |
| 44 | static void |
| 45 | store_inferior_register PARAMS ((int, unsigned int)); |
| 46 | |
| 47 | /* Get kernel_u_addr using HPUX-style nlist(). */ |
| 48 | CORE_ADDR kernel_u_addr; |
| 49 | |
| 50 | struct hpnlist |
| 51 | { |
| 52 | char *n_name; |
| 53 | long n_value; |
| 54 | unsigned char n_type; |
| 55 | unsigned char n_length; |
| 56 | short n_almod; |
| 57 | short n_unused; |
| 58 | }; |
| 59 | static struct hpnlist nl[] = |
| 60 | { |
| 61 | {"_u", -1,}, |
| 62 | {(char *) 0,}}; |
| 63 | |
| 64 | /* read the value of the u area from the hp-ux kernel */ |
| 65 | void |
| 66 | _initialize_hp300ux_nat () |
| 67 | { |
| 68 | #ifndef HPUX_VERSION_5 |
| 69 | nlist ("/hp-ux", nl); |
| 70 | kernel_u_addr = nl[0].n_value; |
| 71 | #else /* HPUX version 5. */ |
| 72 | kernel_u_addr = (CORE_ADDR) 0x0097900; |
| 73 | #endif |
| 74 | } |
| 75 | |
| 76 | #define INFERIOR_AR0(u) \ |
| 77 | ((ptrace \ |
| 78 | (PT_RUAREA, inferior_pid, \ |
| 79 | (PTRACE_ARG3_TYPE) ((char *) &u.u_ar0 - (char *) &u), 0, 0)) \ |
| 80 | - kernel_u_addr) |
| 81 | |
| 82 | static void |
| 83 | fetch_inferior_register (regno, regaddr) |
| 84 | register int regno; |
| 85 | register unsigned int regaddr; |
| 86 | { |
| 87 | #ifndef HPUX_VERSION_5 |
| 88 | if (regno == PS_REGNUM) |
| 89 | { |
| 90 | union |
| 91 | { |
| 92 | int i; |
| 93 | short s[2]; |
| 94 | } |
| 95 | ps_val; |
| 96 | int regval; |
| 97 | |
| 98 | ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, |
| 99 | 0, 0)); |
| 100 | regval = ps_val.s[0]; |
| 101 | supply_register (regno, (char *) ®val); |
| 102 | } |
| 103 | else |
| 104 | #endif /* not HPUX_VERSION_5 */ |
| 105 | { |
| 106 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 107 | register int i; |
| 108 | |
| 109 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
| 110 | { |
| 111 | *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid, |
| 112 | (PTRACE_ARG3_TYPE) regaddr, 0, 0); |
| 113 | regaddr += sizeof (int); |
| 114 | } |
| 115 | supply_register (regno, buf); |
| 116 | } |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | static void |
| 121 | store_inferior_register_1 (regno, regaddr, val) |
| 122 | int regno; |
| 123 | unsigned int regaddr; |
| 124 | int val; |
| 125 | { |
| 126 | errno = 0; |
| 127 | ptrace (PT_WUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, val, 0); |
| 128 | #if 0 |
| 129 | /* HP-UX randomly sets errno to non-zero for regno == 25. |
| 130 | However, the value is correctly written, so ignore errno. */ |
| 131 | if (errno != 0) |
| 132 | { |
| 133 | char string_buf[64]; |
| 134 | |
| 135 | sprintf (string_buf, "writing register number %d", regno); |
| 136 | perror_with_name (string_buf); |
| 137 | } |
| 138 | #endif |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | static void |
| 143 | store_inferior_register (regno, regaddr) |
| 144 | register int regno; |
| 145 | register unsigned int regaddr; |
| 146 | { |
| 147 | #ifndef HPUX_VERSION_5 |
| 148 | if (regno == PS_REGNUM) |
| 149 | { |
| 150 | union |
| 151 | { |
| 152 | int i; |
| 153 | short s[2]; |
| 154 | } |
| 155 | ps_val; |
| 156 | |
| 157 | ps_val.i = (ptrace (PT_RUAREA, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, |
| 158 | 0, 0)); |
| 159 | ps_val.s[0] = (read_register (regno)); |
| 160 | store_inferior_register_1 (regno, regaddr, ps_val.i); |
| 161 | } |
| 162 | else |
| 163 | #endif /* not HPUX_VERSION_5 */ |
| 164 | { |
| 165 | register int i; |
| 166 | |
| 167 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) |
| 168 | { |
| 169 | store_inferior_register_1 |
| 170 | (regno, regaddr, |
| 171 | (*(int *) ®isters[(REGISTER_BYTE (regno)) + i])); |
| 172 | regaddr += sizeof (int); |
| 173 | } |
| 174 | } |
| 175 | return; |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | fetch_inferior_registers (regno) |
| 180 | int regno; |
| 181 | { |
| 182 | struct user u; |
| 183 | register unsigned int ar0_offset; |
| 184 | |
| 185 | ar0_offset = (INFERIOR_AR0 (u)); |
| 186 | if (regno == -1) |
| 187 | { |
| 188 | for (regno = 0; (regno < FP0_REGNUM); regno++) |
| 189 | fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno))); |
| 190 | for (; (regno < NUM_REGS); regno++) |
| 191 | fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno))); |
| 192 | } |
| 193 | else |
| 194 | fetch_inferior_register (regno, |
| 195 | (regno < FP0_REGNUM |
| 196 | ? REGISTER_ADDR (ar0_offset, regno) |
| 197 | : FP_REGISTER_ADDR (u, regno))); |
| 198 | } |
| 199 | |
| 200 | /* Store our register values back into the inferior. |
| 201 | If REGNO is -1, do this for all registers. |
| 202 | Otherwise, REGNO specifies which register (so we can save time). */ |
| 203 | |
| 204 | void |
| 205 | store_inferior_registers (regno) |
| 206 | register int regno; |
| 207 | { |
| 208 | struct user u; |
| 209 | register unsigned int ar0_offset; |
| 210 | |
| 211 | if (regno >= FP0_REGNUM) |
| 212 | { |
| 213 | store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno))); |
| 214 | return; |
| 215 | } |
| 216 | |
| 217 | ar0_offset = (INFERIOR_AR0 (u)); |
| 218 | if (regno >= 0) |
| 219 | { |
| 220 | store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno))); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | for (regno = 0; (regno < FP0_REGNUM); regno++) |
| 225 | store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno))); |
| 226 | for (; (regno < NUM_REGS); regno++) |
| 227 | store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno))); |
| 228 | return; |
| 229 | } |
| 230 | |
| 231 | int |
| 232 | getpagesize () |
| 233 | { |
| 234 | return 4096; |
| 235 | } |