1 /* Functions specific to running gdb native on an ns32k running NetBSD
2 Copyright 1989, 1992, 1993, 1994, 1996 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., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #include <sys/types.h>
22 #include <sys/ptrace.h>
23 #include <machine/reg.h>
24 #include <machine/frame.h>
25 #include <machine/pcb.h>
32 #define RF(dst, src) \
33 memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
35 #define RS(src, dst) \
36 memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
39 fetch_inferior_registers (int regno
)
41 struct reg inferior_registers
;
42 struct fpreg inferior_fpregisters
;
44 ptrace (PT_GETREGS
, inferior_pid
,
45 (PTRACE_ARG3_TYPE
) & inferior_registers
, 0);
46 ptrace (PT_GETFPREGS
, inferior_pid
,
47 (PTRACE_ARG3_TYPE
) & inferior_fpregisters
, 0);
49 RF (R0_REGNUM
+ 0, inferior_registers
.r_r0
);
50 RF (R0_REGNUM
+ 1, inferior_registers
.r_r1
);
51 RF (R0_REGNUM
+ 2, inferior_registers
.r_r2
);
52 RF (R0_REGNUM
+ 3, inferior_registers
.r_r3
);
53 RF (R0_REGNUM
+ 4, inferior_registers
.r_r4
);
54 RF (R0_REGNUM
+ 5, inferior_registers
.r_r5
);
55 RF (R0_REGNUM
+ 6, inferior_registers
.r_r6
);
56 RF (R0_REGNUM
+ 7, inferior_registers
.r_r7
);
58 RF (SP_REGNUM
, inferior_registers
.r_sp
);
59 RF (FP_REGNUM
, inferior_registers
.r_fp
);
60 RF (PC_REGNUM
, inferior_registers
.r_pc
);
61 RF (PS_REGNUM
, inferior_registers
.r_psr
);
63 RF (FPS_REGNUM
, inferior_fpregisters
.r_fsr
);
64 RF (FP0_REGNUM
+ 0, inferior_fpregisters
.r_freg
[0]);
65 RF (FP0_REGNUM
+ 2, inferior_fpregisters
.r_freg
[2]);
66 RF (FP0_REGNUM
+ 4, inferior_fpregisters
.r_freg
[4]);
67 RF (FP0_REGNUM
+ 6, inferior_fpregisters
.r_freg
[6]);
68 RF (LP0_REGNUM
+ 1, inferior_fpregisters
.r_freg
[1]);
69 RF (LP0_REGNUM
+ 3, inferior_fpregisters
.r_freg
[3]);
70 RF (LP0_REGNUM
+ 5, inferior_fpregisters
.r_freg
[5]);
71 RF (LP0_REGNUM
+ 7, inferior_fpregisters
.r_freg
[7]);
76 store_inferior_registers (int regno
)
78 struct reg inferior_registers
;
79 struct fpreg inferior_fpregisters
;
81 RS (R0_REGNUM
+ 0, inferior_registers
.r_r0
);
82 RS (R0_REGNUM
+ 1, inferior_registers
.r_r1
);
83 RS (R0_REGNUM
+ 2, inferior_registers
.r_r2
);
84 RS (R0_REGNUM
+ 3, inferior_registers
.r_r3
);
85 RS (R0_REGNUM
+ 4, inferior_registers
.r_r4
);
86 RS (R0_REGNUM
+ 5, inferior_registers
.r_r5
);
87 RS (R0_REGNUM
+ 6, inferior_registers
.r_r6
);
88 RS (R0_REGNUM
+ 7, inferior_registers
.r_r7
);
90 RS (SP_REGNUM
, inferior_registers
.r_sp
);
91 RS (FP_REGNUM
, inferior_registers
.r_fp
);
92 RS (PC_REGNUM
, inferior_registers
.r_pc
);
93 RS (PS_REGNUM
, inferior_registers
.r_psr
);
95 RS (FPS_REGNUM
, inferior_fpregisters
.r_fsr
);
96 RS (FP0_REGNUM
+ 0, inferior_fpregisters
.r_freg
[0]);
97 RS (FP0_REGNUM
+ 2, inferior_fpregisters
.r_freg
[2]);
98 RS (FP0_REGNUM
+ 4, inferior_fpregisters
.r_freg
[4]);
99 RS (FP0_REGNUM
+ 6, inferior_fpregisters
.r_freg
[6]);
100 RS (LP0_REGNUM
+ 1, inferior_fpregisters
.r_freg
[1]);
101 RS (LP0_REGNUM
+ 3, inferior_fpregisters
.r_freg
[3]);
102 RS (LP0_REGNUM
+ 5, inferior_fpregisters
.r_freg
[5]);
103 RS (LP0_REGNUM
+ 7, inferior_fpregisters
.r_freg
[7]);
105 ptrace (PT_SETREGS
, inferior_pid
,
106 (PTRACE_ARG3_TYPE
) & inferior_registers
, 0);
107 ptrace (PT_SETFPREGS
, inferior_pid
,
108 (PTRACE_ARG3_TYPE
) & inferior_fpregisters
, 0);
112 /* XXX - Add this to machine/regs.h instead? */
119 /* Get registers from a core file. */
121 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, reg_addr
)
123 unsigned core_reg_size
;
125 unsigned int reg_addr
; /* Unused in this version */
127 struct coreregs
*core_reg
;
129 core_reg
= (struct coreregs
*) core_reg_sect
;
132 * We have *all* registers
133 * in the first core section.
137 if (core_reg_size
< sizeof (*core_reg
))
139 fprintf_unfiltered (gdb_stderr
, "Couldn't read regs from core file\n");
143 /* Integer registers */
144 RF (R0_REGNUM
+ 0, core_reg
->intreg
.r_r0
);
145 RF (R0_REGNUM
+ 1, core_reg
->intreg
.r_r1
);
146 RF (R0_REGNUM
+ 2, core_reg
->intreg
.r_r2
);
147 RF (R0_REGNUM
+ 3, core_reg
->intreg
.r_r3
);
148 RF (R0_REGNUM
+ 4, core_reg
->intreg
.r_r4
);
149 RF (R0_REGNUM
+ 5, core_reg
->intreg
.r_r5
);
150 RF (R0_REGNUM
+ 6, core_reg
->intreg
.r_r6
);
151 RF (R0_REGNUM
+ 7, core_reg
->intreg
.r_r7
);
153 RF (SP_REGNUM
, core_reg
->intreg
.r_sp
);
154 RF (FP_REGNUM
, core_reg
->intreg
.r_fp
);
155 RF (PC_REGNUM
, core_reg
->intreg
.r_pc
);
156 RF (PS_REGNUM
, core_reg
->intreg
.r_psr
);
158 /* Floating point registers */
159 RF (FPS_REGNUM
, core_reg
->freg
.r_fsr
);
160 RF (FP0_REGNUM
+ 0, core_reg
->freg
.r_freg
[0]);
161 RF (FP0_REGNUM
+ 2, core_reg
->freg
.r_freg
[2]);
162 RF (FP0_REGNUM
+ 4, core_reg
->freg
.r_freg
[4]);
163 RF (FP0_REGNUM
+ 6, core_reg
->freg
.r_freg
[6]);
164 RF (LP0_REGNUM
+ 1, core_reg
->freg
.r_freg
[1]);
165 RF (LP0_REGNUM
+ 3, core_reg
->freg
.r_freg
[3]);
166 RF (LP0_REGNUM
+ 5, core_reg
->freg
.r_freg
[5]);
167 RF (LP0_REGNUM
+ 7, core_reg
->freg
.r_freg
[7]);
168 registers_fetched ();
171 /* Register that we are able to handle ns32knbsd core file formats.
172 FIXME: is this really bfd_target_unknown_flavour? */
174 static struct core_fns nat_core_fns
=
176 bfd_target_unknown_flavour
, /* core_flavour */
177 default_check_format
, /* check_format */
178 default_core_sniffer
, /* core_sniffer */
179 fetch_core_registers
, /* core_read_registers */
184 _initialize_ns32knbsd_nat (void)
186 add_core_fns (&nat_core_fns
);
191 * kernel_u_size() is not helpful on NetBSD because
192 * the "u" struct is NOT in the core dump file.
195 #ifdef FETCH_KCORE_REGISTERS
197 * Get registers from a kernel crash dump or live kernel.
198 * Called by kcore-nbsd.c:get_kcore_registers().
201 fetch_kcore_registers (struct pcb
*pcb
)
203 struct switchframe sf
;
207 /* Integer registers */
208 if (target_read_memory ((CORE_ADDR
) pcb
->pcb_ksp
, (char *) &sf
, sizeof sf
))
209 error ("Cannot read integer registers.");
211 /* We use the psr at kernel entry */
212 if (target_read_memory ((CORE_ADDR
) pcb
->pcb_onstack
, (char *) &intreg
, sizeof intreg
))
213 error ("Cannot read processor status register.");
216 RF (R0_REGNUM
+ 0, dummy
);
217 RF (R0_REGNUM
+ 1, dummy
);
218 RF (R0_REGNUM
+ 2, dummy
);
219 RF (R0_REGNUM
+ 3, sf
.sf_r3
);
220 RF (R0_REGNUM
+ 4, sf
.sf_r4
);
221 RF (R0_REGNUM
+ 5, sf
.sf_r5
);
222 RF (R0_REGNUM
+ 6, sf
.sf_r6
);
223 RF (R0_REGNUM
+ 7, sf
.sf_r7
);
225 dummy
= pcb
->pcb_kfp
+ 8;
226 RF (SP_REGNUM
, dummy
);
227 RF (FP_REGNUM
, sf
.sf_fp
);
228 RF (PC_REGNUM
, sf
.sf_pc
);
229 RF (PS_REGNUM
, intreg
.r_psr
);
231 /* Floating point registers */
232 RF (FPS_REGNUM
, pcb
->pcb_fsr
);
233 RF (FP0_REGNUM
+ 0, pcb
->pcb_freg
[0]);
234 RF (FP0_REGNUM
+ 2, pcb
->pcb_freg
[2]);
235 RF (FP0_REGNUM
+ 4, pcb
->pcb_freg
[4]);
236 RF (FP0_REGNUM
+ 6, pcb
->pcb_freg
[6]);
237 RF (LP0_REGNUM
+ 1, pcb
->pcb_freg
[1]);
238 RF (LP0_REGNUM
+ 3, pcb
->pcb_freg
[3]);
239 RF (LP0_REGNUM
+ 5, pcb
->pcb_freg
[5]);
240 RF (LP0_REGNUM
+ 7, pcb
->pcb_freg
[7]);
241 registers_fetched ();
243 #endif /* FETCH_KCORE_REGISTERS */
251 /* Integer registers */
252 RF (R0_REGNUM
+ 0, null
);
253 RF (R0_REGNUM
+ 1, null
);
254 RF (R0_REGNUM
+ 2, null
);
255 RF (R0_REGNUM
+ 3, null
);
256 RF (R0_REGNUM
+ 4, null
);
257 RF (R0_REGNUM
+ 5, null
);
258 RF (R0_REGNUM
+ 6, null
);
259 RF (R0_REGNUM
+ 7, null
);
261 RF (SP_REGNUM
, null
);
262 RF (FP_REGNUM
, null
);
263 RF (PC_REGNUM
, null
);
264 RF (PS_REGNUM
, null
);
266 /* Floating point registers */
267 RF (FPS_REGNUM
, zero
);
268 RF (FP0_REGNUM
+ 0, zero
);
269 RF (FP0_REGNUM
+ 2, zero
);
270 RF (FP0_REGNUM
+ 4, zero
);
271 RF (FP0_REGNUM
+ 6, zero
);
272 RF (LP0_REGNUM
+ 0, zero
);
273 RF (LP0_REGNUM
+ 1, zero
);
274 RF (LP0_REGNUM
+ 2, zero
);
275 RF (LP0_REGNUM
+ 3, zero
);
279 /* Return number of args passed to a frame.
280 Can return -1, meaning no way to tell. */
283 frame_num_args (struct frame_info
*fi
)
285 CORE_ADDR enter_addr
;
291 if (read_memory_integer (fi
->frame
, 4) == 0 && fi
->pc
< 0x10000)
293 /* main is always called with three args */
296 enter_addr
= ns32k_get_enter_addr (fi
->pc
);
299 argp
= enter_addr
== 1 ? SAVED_PC_AFTER_CALL (fi
) : FRAME_SAVED_PC (fi
);
300 for (i
= 0; i
< 16; i
++)
303 * After a bsr gcc may emit the following instructions
304 * to remove the arguments from the stack:
305 * cmpqd 0,tos - to remove 4 bytes from the stack
306 * cmpd tos,tos - to remove 8 bytes from the stack
307 * adjsp[bwd] -n - to remove n bytes from the stack
308 * Gcc sometimes delays emitting these instructions and
309 * may even throw a branch between our feet.
311 inst
= read_memory_integer (argp
, 4);
312 args
= read_memory_integer (argp
+ 2, 4);
313 if ((inst
& 0xff) == 0xea)
315 args
= ((inst
>> 8) & 0xffffff) | (args
<< 24);
324 args
= ntohs (args
& 0xffff);
338 if ((inst
& 0xffff) == 0xb81f) /* cmpqd 0,tos */
340 else if ((inst
& 0xffff) == 0xbdc7) /* cmpd tos,tos */
342 else if ((inst
& 0xfffc) == 0xa57c)
347 args
= ((args
& 0xff) + 0x80);
350 args
= ((ntohs (args
) & 0xffff) + 0x8000);
353 args
= -ntohl (args
);
358 if (args
/ 4 > 10 || (args
& 3) != 0)