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, Boston, MA 02111-1307, USA. */
20 #include <sys/types.h>
21 #include <sys/ptrace.h>
22 #include <machine/reg.h>
23 #include <machine/frame.h>
24 #include <machine/pcb.h>
31 #define RF(dst, src) \
32 memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
34 #define RS(src, dst) \
35 memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
38 fetch_inferior_registers (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 (regno
)
79 struct reg inferior_registers
;
80 struct fpreg inferior_fpregisters
;
82 RS(R0_REGNUM
+ 0, inferior_registers
.r_r0
);
83 RS(R0_REGNUM
+ 1, inferior_registers
.r_r1
);
84 RS(R0_REGNUM
+ 2, inferior_registers
.r_r2
);
85 RS(R0_REGNUM
+ 3, inferior_registers
.r_r3
);
86 RS(R0_REGNUM
+ 4, inferior_registers
.r_r4
);
87 RS(R0_REGNUM
+ 5, inferior_registers
.r_r5
);
88 RS(R0_REGNUM
+ 6, inferior_registers
.r_r6
);
89 RS(R0_REGNUM
+ 7, inferior_registers
.r_r7
);
91 RS(SP_REGNUM
, inferior_registers
.r_sp
);
92 RS(FP_REGNUM
, inferior_registers
.r_fp
);
93 RS(PC_REGNUM
, inferior_registers
.r_pc
);
94 RS(PS_REGNUM
, inferior_registers
.r_psr
);
96 RS(FPS_REGNUM
, inferior_fpregisters
.r_fsr
);
97 RS(FP0_REGNUM
+0, inferior_fpregisters
.r_freg
[0]);
98 RS(FP0_REGNUM
+2, inferior_fpregisters
.r_freg
[2]);
99 RS(FP0_REGNUM
+4, inferior_fpregisters
.r_freg
[4]);
100 RS(FP0_REGNUM
+6, inferior_fpregisters
.r_freg
[6]);
101 RS(LP0_REGNUM
+ 1, inferior_fpregisters
.r_freg
[1]);
102 RS(LP0_REGNUM
+ 3, inferior_fpregisters
.r_freg
[3]);
103 RS(LP0_REGNUM
+ 5, inferior_fpregisters
.r_freg
[5]);
104 RS(LP0_REGNUM
+ 7, inferior_fpregisters
.r_freg
[7]);
106 ptrace (PT_SETREGS
, inferior_pid
,
107 (PTRACE_ARG3_TYPE
) &inferior_registers
, 0);
108 ptrace (PT_SETFPREGS
, inferior_pid
,
109 (PTRACE_ARG3_TYPE
) &inferior_fpregisters
, 0);
113 /* 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
)) {
138 fprintf_unfiltered (gdb_stderr
, "Couldn't read regs from core file\n");
142 /* Integer registers */
143 RF(R0_REGNUM
+ 0, core_reg
->intreg
.r_r0
);
144 RF(R0_REGNUM
+ 1, core_reg
->intreg
.r_r1
);
145 RF(R0_REGNUM
+ 2, core_reg
->intreg
.r_r2
);
146 RF(R0_REGNUM
+ 3, core_reg
->intreg
.r_r3
);
147 RF(R0_REGNUM
+ 4, core_reg
->intreg
.r_r4
);
148 RF(R0_REGNUM
+ 5, core_reg
->intreg
.r_r5
);
149 RF(R0_REGNUM
+ 6, core_reg
->intreg
.r_r6
);
150 RF(R0_REGNUM
+ 7, core_reg
->intreg
.r_r7
);
152 RF(SP_REGNUM
, core_reg
->intreg
.r_sp
);
153 RF(FP_REGNUM
, core_reg
->intreg
.r_fp
);
154 RF(PC_REGNUM
, core_reg
->intreg
.r_pc
);
155 RF(PS_REGNUM
, core_reg
->intreg
.r_psr
);
157 /* Floating point registers */
158 RF(FPS_REGNUM
, core_reg
->freg
.r_fsr
);
159 RF(FP0_REGNUM
+0, core_reg
->freg
.r_freg
[0]);
160 RF(FP0_REGNUM
+2, core_reg
->freg
.r_freg
[2]);
161 RF(FP0_REGNUM
+4, core_reg
->freg
.r_freg
[4]);
162 RF(FP0_REGNUM
+6, core_reg
->freg
.r_freg
[6]);
163 RF(LP0_REGNUM
+ 1, core_reg
->freg
.r_freg
[1]);
164 RF(LP0_REGNUM
+ 3, core_reg
->freg
.r_freg
[3]);
165 RF(LP0_REGNUM
+ 5, core_reg
->freg
.r_freg
[5]);
166 RF(LP0_REGNUM
+ 7, core_reg
->freg
.r_freg
[7]);
167 registers_fetched ();
170 /* Register that we are able to handle ns32knbsd core file formats.
171 FIXME: is this really bfd_target_unknown_flavour? */
173 static struct core_fns nat_core_fns
=
175 bfd_target_unknown_flavour
,
176 fetch_core_registers
,
181 _initialize_ns32knbsd_nat ()
183 add_core_fns (&nat_core_fns
);
188 * kernel_u_size() is not helpful on NetBSD because
189 * the "u" struct is NOT in the core dump file.
192 #ifdef FETCH_KCORE_REGISTERS
194 * Get registers from a kernel crash dump or live kernel.
195 * Called by kcore-nbsd.c:get_kcore_registers().
198 fetch_kcore_registers (pcb
)
201 struct switchframe sf
;
205 /* Integer registers */
206 if (target_read_memory((CORE_ADDR
)pcb
->pcb_ksp
, (char *)&sf
, sizeof sf
))
207 error("Cannot read integer registers.");
209 /* We use the psr at kernel entry */
210 if (target_read_memory((CORE_ADDR
)pcb
->pcb_onstack
, (char *)&intreg
, sizeof intreg
))
211 error("Cannot read processor status register.");
214 RF(R0_REGNUM
+ 0, dummy
);
215 RF(R0_REGNUM
+ 1, dummy
);
216 RF(R0_REGNUM
+ 2, dummy
);
217 RF(R0_REGNUM
+ 3, sf
.sf_r3
);
218 RF(R0_REGNUM
+ 4, sf
.sf_r4
);
219 RF(R0_REGNUM
+ 5, sf
.sf_r5
);
220 RF(R0_REGNUM
+ 6, sf
.sf_r6
);
221 RF(R0_REGNUM
+ 7, sf
.sf_r7
);
223 dummy
= pcb
->pcb_kfp
+ 8;
224 RF(SP_REGNUM
, dummy
);
225 RF(FP_REGNUM
, sf
.sf_fp
);
226 RF(PC_REGNUM
, sf
.sf_pc
);
227 RF(PS_REGNUM
, intreg
.r_psr
);
229 /* Floating point registers */
230 RF(FPS_REGNUM
, pcb
->pcb_fsr
);
231 RF(FP0_REGNUM
+0, pcb
->pcb_freg
[0]);
232 RF(FP0_REGNUM
+2, pcb
->pcb_freg
[2]);
233 RF(FP0_REGNUM
+4, pcb
->pcb_freg
[4]);
234 RF(FP0_REGNUM
+6, pcb
->pcb_freg
[6]);
235 RF(LP0_REGNUM
+ 1, pcb
->pcb_freg
[1]);
236 RF(LP0_REGNUM
+ 3, pcb
->pcb_freg
[3]);
237 RF(LP0_REGNUM
+ 5, pcb
->pcb_freg
[5]);
238 RF(LP0_REGNUM
+ 7, pcb
->pcb_freg
[7]);
239 registers_fetched ();
241 #endif /* FETCH_KCORE_REGISTERS */
249 /* Integer registers */
250 RF(R0_REGNUM
+ 0, null
);
251 RF(R0_REGNUM
+ 1, null
);
252 RF(R0_REGNUM
+ 2, null
);
253 RF(R0_REGNUM
+ 3, null
);
254 RF(R0_REGNUM
+ 4, null
);
255 RF(R0_REGNUM
+ 5, null
);
256 RF(R0_REGNUM
+ 6, null
);
257 RF(R0_REGNUM
+ 7, null
);
259 RF(SP_REGNUM
, null
);
260 RF(FP_REGNUM
, null
);
261 RF(PC_REGNUM
, null
);
262 RF(PS_REGNUM
, null
);
264 /* Floating point registers */
265 RF(FPS_REGNUM
, zero
);
266 RF(FP0_REGNUM
+0, zero
);
267 RF(FP0_REGNUM
+2, zero
);
268 RF(FP0_REGNUM
+4, zero
);
269 RF(FP0_REGNUM
+6, zero
);
270 RF(LP0_REGNUM
+ 0, zero
);
271 RF(LP0_REGNUM
+ 1, zero
);
272 RF(LP0_REGNUM
+ 2, zero
);
273 RF(LP0_REGNUM
+ 3, zero
);
277 /* Return number of args passed to a frame.
278 Can return -1, meaning no way to tell. */
282 struct frame_info
*fi
;
284 CORE_ADDR enter_addr
;
290 if (read_memory_integer (fi
->frame
, 4) == 0 && fi
->pc
< 0x10000) {
291 /* main is always called with three args */
294 enter_addr
= ns32k_get_enter_addr(fi
->pc
);
297 argp
= enter_addr
== 1 ? SAVED_PC_AFTER_CALL(fi
) : FRAME_SAVED_PC(fi
);
298 for (i
= 0; i
< 16; i
++) {
300 * After a bsr gcc may emit the following instructions
301 * to remove the arguments from the stack:
302 * cmpqd 0,tos - to remove 4 bytes from the stack
303 * cmpd tos,tos - to remove 8 bytes from the stack
304 * adjsp[bwd] -n - to remove n bytes from the stack
305 * Gcc sometimes delays emitting these instructions and
306 * may even throw a branch between our feet.
308 inst
= read_memory_integer(argp
, 4);
309 args
= read_memory_integer(argp
+ 2, 4);
310 if ((inst
& 0xff) == 0xea) { /* br */
311 args
= ((inst
>> 8) & 0xffffff) | (args
<< 24);
316 args
= ntohs(args
& 0xffff);
328 if ((inst
& 0xffff) == 0xb81f) /* cmpqd 0,tos */
330 else if ((inst
& 0xffff) == 0xbdc7) /* cmpd tos,tos */
332 else if ((inst
& 0xfffc) == 0xa57c) { /* adjsp[bwd] */
335 args
= ((args
& 0xff) + 0x80);
338 args
= ((ntohs(args
) & 0xffff) + 0x8000);
346 if (args
/ 4 > 10 || (args
& 3) != 0)