1 /* Native-dependent code for GDB, for NYU Ultra3 running Sym1 OS.
2 Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
3 Contributed by David Wood (wood@nyu.edu) at New York University.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
29 #include <sys/types.h>
30 #include <sys/param.h>
32 #include <sys/ioctl.h>
40 static void fetch_core_registers (char *, unsigned, int, CORE_ADDR);
42 /* Assumes support for AMD's Binary Compatibility Standard
43 for ptrace(). If you define ULTRA3, the ultra3 extensions to
44 ptrace() are used allowing the reading of more than one register
47 This file assumes KERNEL_DEBUGGING is turned off. This means
48 that if the user/gdb tries to read gr64-gr95 or any of the
49 protected special registers we silently return -1 (see the
50 CANNOT_STORE/FETCH_REGISTER macros). */
53 #if !defined (offsetof)
54 #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
58 struct ptrace_user pt_struct;
60 /* Get all available registers from the inferior. Registers that are
61 * defined in REGISTER_NAMES, but not available to the user/gdb are
62 * supplied as -1. This may include gr64-gr95 and the protected special
67 fetch_inferior_registers (int regno)
69 register int i, j, ret_val = 0;
74 fetch_register (regno);
78 /* Global Registers */
81 ptrace (PT_READ_STRUCT, inferior_pid,
82 (PTRACE_ARG3_TYPE) register_addr (GR96_REGNUM, 0),
83 (int) &pt_struct.pt_gr[0], 32 * 4);
86 perror_with_name ("reading global registers");
90 for (regno = GR96_REGNUM, j = 0; j < 32; regno++, j++)
92 supply_register (regno, &pt_struct.pt_gr[j]);
95 for (regno = GR96_REGNUM; !ret_val && regno < GR96_REGNUM + 32; regno++)
96 fetch_register (regno);
102 ptrace (PT_READ_STRUCT, inferior_pid,
103 (PTRACE_ARG3_TYPE) register_addr (LR0_REGNUM, 0),
104 (int) &pt_struct.pt_lr[0], 128 * 4);
107 perror_with_name ("reading local registers");
111 for (regno = LR0_REGNUM, j = 0; j < 128; regno++, j++)
113 supply_register (regno, &pt_struct.pt_lr[j]);
116 for (regno = LR0_REGNUM; !ret_val && regno < LR0_REGNUM + 128; regno++)
117 fetch_register (regno);
120 /* Special Registers */
121 fetch_register (GR1_REGNUM);
122 fetch_register (CPS_REGNUM);
123 fetch_register (PC_REGNUM);
124 fetch_register (NPC_REGNUM);
125 fetch_register (PC2_REGNUM);
126 fetch_register (IPC_REGNUM);
127 fetch_register (IPA_REGNUM);
128 fetch_register (IPB_REGNUM);
129 fetch_register (Q_REGNUM);
130 fetch_register (BP_REGNUM);
131 fetch_register (FC_REGNUM);
133 /* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
134 registers_fetched ();
137 /* Store our register values back into the inferior.
138 * If REGNO is -1, do this for all registers.
139 * Otherwise, REGNO specifies which register (so we can save time).
140 * NOTE: Assumes AMD's binary compatibility standard.
144 store_inferior_registers (int regno)
146 register unsigned int regaddr;
151 if (CANNOT_STORE_REGISTER (regno))
153 regaddr = register_addr (regno, 0);
155 ptrace (PT_WRITE_U, inferior_pid,
156 (PTRACE_ARG3_TYPE) regaddr, read_register (regno));
159 sprintf (buf, "writing register %s (#%d)", REGISTER_NAME (regno), regno);
160 perror_with_name (buf);
166 pt_struct.pt_gr1 = read_register (GR1_REGNUM);
167 for (regno = GR96_REGNUM; regno < GR96_REGNUM + 32; regno++)
168 pt_struct.pt_gr[regno] = read_register (regno);
169 for (regno = LR0_REGNUM; regno < LR0_REGNUM + 128; regno++)
170 pt_struct.pt_gr[regno] = read_register (regno);
172 ptrace (PT_WRITE_STRUCT, inferior_pid,
173 (PTRACE_ARG3_TYPE) register_addr (GR1_REGNUM, 0),
174 (int) &pt_struct.pt_gr1, (1 * 32 * 128) * 4);
177 sprintf (buf, "writing all local/global registers");
178 perror_with_name (buf);
180 pt_struct.pt_psr = read_register (CPS_REGNUM);
181 pt_struct.pt_pc0 = read_register (NPC_REGNUM);
182 pt_struct.pt_pc1 = read_register (PC_REGNUM);
183 pt_struct.pt_pc2 = read_register (PC2_REGNUM);
184 pt_struct.pt_ipc = read_register (IPC_REGNUM);
185 pt_struct.pt_ipa = read_register (IPA_REGNUM);
186 pt_struct.pt_ipb = read_register (IPB_REGNUM);
187 pt_struct.pt_q = read_register (Q_REGNUM);
188 pt_struct.pt_bp = read_register (BP_REGNUM);
189 pt_struct.pt_fc = read_register (FC_REGNUM);
191 ptrace (PT_WRITE_STRUCT, inferior_pid,
192 (PTRACE_ARG3_TYPE) register_addr (CPS_REGNUM, 0),
193 (int) &pt_struct.pt_psr, (10) * 4);
196 sprintf (buf, "writing all special registers");
197 perror_with_name (buf);
201 store_inferior_registers (GR1_REGNUM);
202 for (regno = GR96_REGNUM; regno < GR96_REGNUM + 32; regno++)
203 store_inferior_registers (regno);
204 for (regno = LR0_REGNUM; regno < LR0_REGNUM + 128; regno++)
205 store_inferior_registers (regno);
206 store_inferior_registers (CPS_REGNUM);
207 store_inferior_registers (PC_REGNUM);
208 store_inferior_registers (NPC_REGNUM);
209 store_inferior_registers (PC2_REGNUM);
210 store_inferior_registers (IPC_REGNUM);
211 store_inferior_registers (IPA_REGNUM);
212 store_inferior_registers (IPB_REGNUM);
213 store_inferior_registers (Q_REGNUM);
214 store_inferior_registers (BP_REGNUM);
215 store_inferior_registers (FC_REGNUM);
221 * Fetch an individual register (and supply it).
222 * return 0 on success, -1 on failure.
223 * NOTE: Assumes AMD's Binary Compatibility Standard for ptrace().
226 fetch_register (int regno)
231 if (CANNOT_FETCH_REGISTER (regno))
234 supply_register (regno, &val);
239 val = ptrace (PT_READ_U, inferior_pid,
240 (PTRACE_ARG3_TYPE) register_addr (regno, 0), 0);
243 sprintf (buf, "reading register %s (#%d)", REGISTER_NAME (regno), regno);
244 perror_with_name (buf);
248 supply_register (regno, &val);
255 * Read AMD's Binary Compatibilty Standard conforming core file.
256 * struct ptrace_user is the first thing in the core file
258 * CORE_REG_SECT, CORE_REG_SIZE, WHICH, and REG_ADDR are all ignored.
262 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
263 int which, CORE_ADDR reg_addr)
269 for (regno = 0; regno < NUM_REGS; regno++)
271 if (!CANNOT_FETCH_REGISTER (regno))
273 val = bfd_seek (core_bfd, (file_ptr) register_addr (regno, 0), SEEK_SET);
274 if (val < 0 || (val = bfd_read (buf, sizeof buf, 1, core_bfd)) < 0)
276 char *buffer = (char *) alloca (strlen (REGISTER_NAME (regno)) + 35);
277 strcpy (buffer, "Reading core register ");
278 strcat (buffer, REGISTER_NAME (regno));
279 perror_with_name (buffer);
281 supply_register (regno, buf);
285 /* Fake any registers that are in REGISTER_NAMES, but not available to gdb */
286 registers_fetched ();
291 * Takes a register number as defined in tm.h via REGISTER_NAMES, and maps
292 * it to an offset in a struct ptrace_user defined by AMD's BCS.
293 * That is, it defines the mapping between gdb register numbers and items in
294 * a struct ptrace_user.
295 * A register protection scheme is set up here. If a register not
296 * available to the user is specified in 'regno', then an address that
297 * will cause ptrace() to fail is returned.
300 register_addr (int regno, CORE_ADDR blockend)
302 if ((regno >= LR0_REGNUM) && (regno < LR0_REGNUM + 128))
304 return (offsetof (struct ptrace_user, pt_lr[regno - LR0_REGNUM]));
306 else if ((regno >= GR96_REGNUM) && (regno < GR96_REGNUM + 32))
308 return (offsetof (struct ptrace_user, pt_gr[regno - GR96_REGNUM]));
315 return (offsetof (struct ptrace_user, pt_gr1));
317 return (offsetof (struct ptrace_user, pt_psr));
319 return (offsetof (struct ptrace_user, pt_pc0));
321 return (offsetof (struct ptrace_user, pt_pc1));
323 return (offsetof (struct ptrace_user, pt_pc2));
325 return (offsetof (struct ptrace_user, pt_ipc));
327 return (offsetof (struct ptrace_user, pt_ipa));
329 return (offsetof (struct ptrace_user, pt_ipb));
331 return (offsetof (struct ptrace_user, pt_q));
333 return (offsetof (struct ptrace_user, pt_bp));
335 return (offsetof (struct ptrace_user, pt_fc));
337 fprintf_filtered (gdb_stderr, "register_addr():Bad register %s (%d)\n",
338 REGISTER_NAME (regno), regno);
339 return (0xffffffff); /* Should make ptrace() fail */
345 /* Register that we are able to handle ultra3 core file formats.
346 FIXME: is this really bfd_target_unknown_flavour? */
348 static struct core_fns ultra3_core_fns =
350 bfd_target_unknown_flavour, /* core_flavour */
351 default_check_format, /* check_format */
352 default_core_sniffer, /* core_sniffer */
353 fetch_core_registers, /* core_read_registers */
358 _initialize_core_ultra3 (void)
360 add_core_fns (&ultra3_core_fns);