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. REG_ADDR is unused. */
121 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
122 unsigned int reg_addr)
124 struct coreregs *core_reg;
126 core_reg = (struct coreregs *) core_reg_sect;
129 * We have *all* registers
130 * in the first core section.
134 if (core_reg_size < sizeof (*core_reg))
136 fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
140 /* Integer registers */
141 RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
142 RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
143 RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
144 RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
145 RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
146 RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
147 RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
148 RF (R0_REGNUM + 7, core_reg->intreg.r_r7);
150 RF (SP_REGNUM, core_reg->intreg.r_sp);
151 RF (FP_REGNUM, core_reg->intreg.r_fp);
152 RF (PC_REGNUM, core_reg->intreg.r_pc);
153 RF (PS_REGNUM, core_reg->intreg.r_psr);
155 /* Floating point registers */
156 RF (FPS_REGNUM, core_reg->freg.r_fsr);
157 RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
158 RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
159 RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
160 RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
161 RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
162 RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
163 RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
164 RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
165 registers_fetched ();
168 /* Register that we are able to handle ns32knbsd core file formats.
169 FIXME: is this really bfd_target_unknown_flavour? */
171 static struct core_fns nat_core_fns =
173 bfd_target_unknown_flavour, /* core_flavour */
174 default_check_format, /* check_format */
175 default_core_sniffer, /* core_sniffer */
176 fetch_core_registers, /* core_read_registers */
181 _initialize_ns32knbsd_nat (void)
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 (struct pcb *pcb)
200 struct switchframe sf;
204 /* Integer registers */
205 if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
206 error ("Cannot read integer registers.");
208 /* We use the psr at kernel entry */
209 if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
210 error ("Cannot read processor status register.");
213 RF (R0_REGNUM + 0, dummy);
214 RF (R0_REGNUM + 1, dummy);
215 RF (R0_REGNUM + 2, dummy);
216 RF (R0_REGNUM + 3, sf.sf_r3);
217 RF (R0_REGNUM + 4, sf.sf_r4);
218 RF (R0_REGNUM + 5, sf.sf_r5);
219 RF (R0_REGNUM + 6, sf.sf_r6);
220 RF (R0_REGNUM + 7, sf.sf_r7);
222 dummy = pcb->pcb_kfp + 8;
223 RF (SP_REGNUM, dummy);
224 RF (FP_REGNUM, sf.sf_fp);
225 RF (PC_REGNUM, sf.sf_pc);
226 RF (PS_REGNUM, intreg.r_psr);
228 /* Floating point registers */
229 RF (FPS_REGNUM, pcb->pcb_fsr);
230 RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
231 RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
232 RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
233 RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
234 RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
235 RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
236 RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
237 RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
238 registers_fetched ();
240 #endif /* FETCH_KCORE_REGISTERS */
248 /* Integer registers */
249 RF (R0_REGNUM + 0, null);
250 RF (R0_REGNUM + 1, null);
251 RF (R0_REGNUM + 2, null);
252 RF (R0_REGNUM + 3, null);
253 RF (R0_REGNUM + 4, null);
254 RF (R0_REGNUM + 5, null);
255 RF (R0_REGNUM + 6, null);
256 RF (R0_REGNUM + 7, null);
258 RF (SP_REGNUM, null);
259 RF (FP_REGNUM, null);
260 RF (PC_REGNUM, null);
261 RF (PS_REGNUM, null);
263 /* Floating point registers */
264 RF (FPS_REGNUM, zero);
265 RF (FP0_REGNUM + 0, zero);
266 RF (FP0_REGNUM + 2, zero);
267 RF (FP0_REGNUM + 4, zero);
268 RF (FP0_REGNUM + 6, zero);
269 RF (LP0_REGNUM + 0, zero);
270 RF (LP0_REGNUM + 1, zero);
271 RF (LP0_REGNUM + 2, zero);
272 RF (LP0_REGNUM + 3, zero);
276 /* Return number of args passed to a frame.
277 Can return -1, meaning no way to tell. */
280 frame_num_args (struct frame_info *fi)
282 CORE_ADDR enter_addr;
288 if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
290 /* main is always called with three args */
293 enter_addr = ns32k_get_enter_addr (fi->pc);
296 argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
297 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)
312 args = ((inst >> 8) & 0xffffff) | (args << 24);
321 args = ntohs (args & 0xffff);
335 if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
337 else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
339 else if ((inst & 0xfffc) == 0xa57c)
344 args = ((args & 0xff) + 0x80);
347 args = ((ntohs (args) & 0xffff) + 0x8000);
350 args = -ntohl (args);
355 if (args / 4 > 10 || (args & 3) != 0)