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 (regno)
42 struct reg inferior_registers;
43 struct fpreg inferior_fpregisters;
45 ptrace (PT_GETREGS, inferior_pid,
46 (PTRACE_ARG3_TYPE) & inferior_registers, 0);
47 ptrace (PT_GETFPREGS, inferior_pid,
48 (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
50 RF (R0_REGNUM + 0, inferior_registers.r_r0);
51 RF (R0_REGNUM + 1, inferior_registers.r_r1);
52 RF (R0_REGNUM + 2, inferior_registers.r_r2);
53 RF (R0_REGNUM + 3, inferior_registers.r_r3);
54 RF (R0_REGNUM + 4, inferior_registers.r_r4);
55 RF (R0_REGNUM + 5, inferior_registers.r_r5);
56 RF (R0_REGNUM + 6, inferior_registers.r_r6);
57 RF (R0_REGNUM + 7, inferior_registers.r_r7);
59 RF (SP_REGNUM, inferior_registers.r_sp);
60 RF (FP_REGNUM, inferior_registers.r_fp);
61 RF (PC_REGNUM, inferior_registers.r_pc);
62 RF (PS_REGNUM, inferior_registers.r_psr);
64 RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
65 RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
66 RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
67 RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
68 RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
69 RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
70 RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
71 RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
72 RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
77 store_inferior_registers (regno)
80 struct reg inferior_registers;
81 struct fpreg inferior_fpregisters;
83 RS (R0_REGNUM + 0, inferior_registers.r_r0);
84 RS (R0_REGNUM + 1, inferior_registers.r_r1);
85 RS (R0_REGNUM + 2, inferior_registers.r_r2);
86 RS (R0_REGNUM + 3, inferior_registers.r_r3);
87 RS (R0_REGNUM + 4, inferior_registers.r_r4);
88 RS (R0_REGNUM + 5, inferior_registers.r_r5);
89 RS (R0_REGNUM + 6, inferior_registers.r_r6);
90 RS (R0_REGNUM + 7, inferior_registers.r_r7);
92 RS (SP_REGNUM, inferior_registers.r_sp);
93 RS (FP_REGNUM, inferior_registers.r_fp);
94 RS (PC_REGNUM, inferior_registers.r_pc);
95 RS (PS_REGNUM, inferior_registers.r_psr);
97 RS (FPS_REGNUM, inferior_fpregisters.r_fsr);
98 RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
99 RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
100 RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
101 RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
102 RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
103 RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
104 RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
105 RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
107 ptrace (PT_SETREGS, inferior_pid,
108 (PTRACE_ARG3_TYPE) & inferior_registers, 0);
109 ptrace (PT_SETFPREGS, inferior_pid,
110 (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
114 /* XXX - Add this to machine/regs.h instead? */
121 /* Get registers from a core file. */
123 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
125 unsigned core_reg_size;
127 unsigned int reg_addr; /* Unused in this version */
129 struct coreregs *core_reg;
131 core_reg = (struct coreregs *) core_reg_sect;
134 * We have *all* registers
135 * in the first core section.
139 if (core_reg_size < sizeof (*core_reg))
141 fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
145 /* Integer registers */
146 RF (R0_REGNUM + 0, core_reg->intreg.r_r0);
147 RF (R0_REGNUM + 1, core_reg->intreg.r_r1);
148 RF (R0_REGNUM + 2, core_reg->intreg.r_r2);
149 RF (R0_REGNUM + 3, core_reg->intreg.r_r3);
150 RF (R0_REGNUM + 4, core_reg->intreg.r_r4);
151 RF (R0_REGNUM + 5, core_reg->intreg.r_r5);
152 RF (R0_REGNUM + 6, core_reg->intreg.r_r6);
153 RF (R0_REGNUM + 7, core_reg->intreg.r_r7);
155 RF (SP_REGNUM, core_reg->intreg.r_sp);
156 RF (FP_REGNUM, core_reg->intreg.r_fp);
157 RF (PC_REGNUM, core_reg->intreg.r_pc);
158 RF (PS_REGNUM, core_reg->intreg.r_psr);
160 /* Floating point registers */
161 RF (FPS_REGNUM, core_reg->freg.r_fsr);
162 RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]);
163 RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]);
164 RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]);
165 RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]);
166 RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
167 RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
168 RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
169 RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
170 registers_fetched ();
173 /* Register that we are able to handle ns32knbsd core file formats.
174 FIXME: is this really bfd_target_unknown_flavour? */
176 static struct core_fns nat_core_fns =
178 bfd_target_unknown_flavour,
179 fetch_core_registers,
184 _initialize_ns32knbsd_nat ()
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 (pcb)
204 struct switchframe sf;
208 /* Integer registers */
209 if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
210 error ("Cannot read integer registers.");
212 /* We use the psr at kernel entry */
213 if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
214 error ("Cannot read processor status register.");
217 RF (R0_REGNUM + 0, dummy);
218 RF (R0_REGNUM + 1, dummy);
219 RF (R0_REGNUM + 2, dummy);
220 RF (R0_REGNUM + 3, sf.sf_r3);
221 RF (R0_REGNUM + 4, sf.sf_r4);
222 RF (R0_REGNUM + 5, sf.sf_r5);
223 RF (R0_REGNUM + 6, sf.sf_r6);
224 RF (R0_REGNUM + 7, sf.sf_r7);
226 dummy = pcb->pcb_kfp + 8;
227 RF (SP_REGNUM, dummy);
228 RF (FP_REGNUM, sf.sf_fp);
229 RF (PC_REGNUM, sf.sf_pc);
230 RF (PS_REGNUM, intreg.r_psr);
232 /* Floating point registers */
233 RF (FPS_REGNUM, pcb->pcb_fsr);
234 RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
235 RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
236 RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
237 RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
238 RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
239 RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
240 RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
241 RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
242 registers_fetched ();
244 #endif /* FETCH_KCORE_REGISTERS */
252 /* Integer registers */
253 RF (R0_REGNUM + 0, null);
254 RF (R0_REGNUM + 1, null);
255 RF (R0_REGNUM + 2, null);
256 RF (R0_REGNUM + 3, null);
257 RF (R0_REGNUM + 4, null);
258 RF (R0_REGNUM + 5, null);
259 RF (R0_REGNUM + 6, null);
260 RF (R0_REGNUM + 7, null);
262 RF (SP_REGNUM, null);
263 RF (FP_REGNUM, null);
264 RF (PC_REGNUM, null);
265 RF (PS_REGNUM, null);
267 /* Floating point registers */
268 RF (FPS_REGNUM, zero);
269 RF (FP0_REGNUM + 0, zero);
270 RF (FP0_REGNUM + 2, zero);
271 RF (FP0_REGNUM + 4, zero);
272 RF (FP0_REGNUM + 6, zero);
273 RF (LP0_REGNUM + 0, zero);
274 RF (LP0_REGNUM + 1, zero);
275 RF (LP0_REGNUM + 2, zero);
276 RF (LP0_REGNUM + 3, zero);
280 /* Return number of args passed to a frame.
281 Can return -1, meaning no way to tell. */
285 struct frame_info *fi;
287 CORE_ADDR enter_addr;
293 if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
295 /* main is always called with three args */
298 enter_addr = ns32k_get_enter_addr (fi->pc);
301 argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL (fi) : FRAME_SAVED_PC (fi);
302 for (i = 0; i < 16; i++)
305 * After a bsr gcc may emit the following instructions
306 * to remove the arguments from the stack:
307 * cmpqd 0,tos - to remove 4 bytes from the stack
308 * cmpd tos,tos - to remove 8 bytes from the stack
309 * adjsp[bwd] -n - to remove n bytes from the stack
310 * Gcc sometimes delays emitting these instructions and
311 * may even throw a branch between our feet.
313 inst = read_memory_integer (argp, 4);
314 args = read_memory_integer (argp + 2, 4);
315 if ((inst & 0xff) == 0xea)
317 args = ((inst >> 8) & 0xffffff) | (args << 24);
326 args = ntohs (args & 0xffff);
340 if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
342 else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
344 else if ((inst & 0xfffc) == 0xa57c)
349 args = ((args & 0xff) + 0x80);
352 args = ((ntohs (args) & 0xffff) + 0x8000);
355 args = -ntohl (args);
360 if (args / 4 > 10 || (args & 3) != 0)