1 /* Host-dependent Motorola 88xxx support for GDB, the GNU Debugger.
2 Copyright 1988, 1990, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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. */
25 #include <sys/types.h>
28 #include <sys/param.h>
34 #ifndef USER /* added to support BCS ptrace_user */
35 #define USER ptrace_user
37 #include <sys/ioctl.h>
47 #include <sys/ptrace.h>
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
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
60 extern int have_symbol_file_p();
62 extern jmp_buf stack_jmp;
65 extern char registers[REGISTER_BYTES];
68 fetch_inferior_registers (regno)
69 int regno; /* Original value discarded */
71 register unsigned int regaddr;
72 char buf[MAX_REGISTER_RAW_SIZE];
78 offset = (char *) &u.pt_r0 - (char *) &u;
79 regaddr = offset; /* byte offset to r0;*/
81 /* offset = ptrace (3, inferior_pid, offset, 0) - KERNEL_U_ADDR; */
82 for (regno = 0; regno < NUM_REGS; regno++)
84 /*regaddr = register_addr (regno, offset);*/
87 for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
89 *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
90 regaddr += sizeof (int);
92 supply_register (regno, buf);
94 /* now load up registers 36 - 38; special pc registers */
95 *(int *) &buf[0] = ptrace (3,inferior_pid,SXIP_OFFSET ,0);
96 supply_register (SXIP_REGNUM, buf);
97 *(int *) &buf[0] = ptrace (3, inferior_pid,SNIP_OFFSET,0);
98 supply_register (SNIP_REGNUM, buf);
99 *(int *) &buf[0] = ptrace (3, inferior_pid,SFIP_OFFSET,0);
100 supply_register (SFIP_REGNUM, buf);
103 /* Store our register values back into the inferior.
104 If REGNO is -1, do this for all registers.
105 Otherwise, REGNO specifies which register (so we can save time). */
108 store_inferior_registers (regno)
111 register unsigned int regaddr;
117 unsigned int offset = (char *) &u.pt_r0 - (char *) &u;
123 /* regaddr = register_addr (regno, offset); */
124 if (regno < PC_REGNUM)
126 regaddr = offset + regno * sizeof (int);
128 ptrace (6, inferior_pid, regaddr, read_register (regno));
131 sprintf (buf, "writing register number %d", regno);
132 perror_with_name (buf);
135 else if (regno == SXIP_REGNUM)
136 ptrace (6, inferior_pid, SXIP_OFFSET, read_register(regno));
137 else if (regno == SNIP_REGNUM)
138 ptrace (6, inferior_pid, SNIP_OFFSET, read_register(regno));
139 else if (regno == SFIP_REGNUM)
140 ptrace (6, inferior_pid, SFIP_OFFSET, read_register(regno));
141 else printf ("Bad register number for store_inferior routine\n");
144 for (regno = 0; regno < NUM_REGS - 3; regno++)
146 /* regaddr = register_addr (regno, offset); */
148 regaddr = offset + regno * sizeof (int);
149 ptrace (6, inferior_pid, regaddr, read_register (regno));
152 sprintf (buf, "writing register number %d", regno);
153 perror_with_name (buf);
156 ptrace (6,inferior_pid,SXIP_OFFSET,read_register(SXIP_REGNUM));
157 ptrace (6,inferior_pid,SNIP_OFFSET,read_register(SNIP_REGNUM));
158 ptrace (6,inferior_pid,SFIP_OFFSET,read_register(SFIP_REGNUM));
165 /* Core files are now a function of BFD. */
168 core_file_command (filename, from_tty)
173 extern char registers[];
175 /* Need symbol file and one with tdesc info for corefiles to work */
176 if (!have_symbol_file_p())
177 error ("Requires symbol-file and exec-file");
179 error ("Requires exec-file and symbol-file");
181 /* Discard all vestiges of any previous core file
182 and mark data and stack spaces as empty. */
194 stack_start = STACK_END_ADDR;
195 stack_end = STACK_END_ADDR;
197 /* Now, if a new core file was specified, open it and digest it. */
201 filename = tilde_expand (filename);
202 make_cleanup (free, filename);
204 if (have_inferior_p ())
205 error ("To look at a core file, you must kill the inferior with \"kill\".");
206 corechan = open (filename, O_RDONLY, 0);
208 perror_with_name (filename);
209 /* 4.2-style (and perhaps also sysV-style) core dump file. */
215 val = myread (corechan, &u, sizeof u);
217 perror_with_name (filename);
218 data_start = u.pt_o_data_start;
220 data_end = data_start + u.pt_dsize;
221 stack_start = stack_end - u.pt_ssize;
222 data_offset = u.pt_dataptr;
223 stack_offset = data_offset + u.pt_dsize;
231 #endif /* defined (DGUX) */
235 reg_offset = (int) u.pt_r0 - KERNEL_U_ADDR;
237 #endif /* defined(BCS) */
239 /* I don't know where to find this info.
240 So, for now, mark it as not available. */
241 /* N_SET_MAGIC (core_aouthdr, 0); */
242 bzero ((char *) &core_aouthdr, sizeof core_aouthdr);
244 /* Read the register values out of the core file and store
245 them where `read_register' will find them. */
250 for (regno = 0; regno < NUM_REGS; regno++)
252 char buf[MAX_REGISTER_RAW_SIZE];
254 val = lseek (corechan, register_addr (regno, reg_offset), 0);
256 perror_with_name (filename);
258 val = myread (corechan, buf, sizeof buf);
260 perror_with_name (filename);
261 supply_register (regno, buf);
265 if (filename[0] == '/')
266 corefile = savestring (filename, strlen (filename));
269 corefile = concat (current_directory, "/", filename, NULL);
272 current_context = init_dcontext();
273 set_current_frame ( create_new_frame(get_frame_base (read_pc()),
275 select_frame (get_current_frame (), 0);
279 printf ("No core file now.\n");
283 /* blockend is the address of the end of the user structure */
284 m88k_register_u_addr (blockend, regnum)
287 int ustart = blockend - sizeof (struct USER);
321 case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + sizeof(REGISTER_TYPE) * regnum);
322 case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u));
323 case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u));
324 case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u));
325 case SXIP_REGNUM: return (ustart + SXIP_OFFSET);
326 case SNIP_REGNUM: return (ustart + SNIP_OFFSET);
327 case SFIP_REGNUM: return (ustart + SFIP_OFFSET);
328 default: return (blockend + sizeof (REGISTER_TYPE) * regnum);