1 /* Functions specific to running gdb native on an ns32k running NetBSD
2 Copyright 1989, 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #include <sys/types.h>
23 #include <sys/ptrace.h>
24 #include <machine/reg.h>
25 #include <machine/frame.h>
26 #include <machine/pcb.h>
34 #define RF(dst, src) \
35 memcpy(&deprecated_registers[DEPRECATED_REGISTER_BYTE(dst)], &src, sizeof(src))
37 #define RS(src, dst) \
38 memcpy(&dst, &deprecated_registers[DEPRECATED_REGISTER_BYTE(src)], sizeof(dst))
41 fetch_inferior_registers (int regno)
43 struct reg inferior_registers;
44 struct fpreg inferior_fpregisters;
46 ptrace (PT_GETREGS, PIDGET (inferior_ptid),
47 (PTRACE_ARG3_TYPE) & inferior_registers, 0);
48 ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
49 (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
51 RF (R0_REGNUM + 0, inferior_registers.r_r0);
52 RF (R0_REGNUM + 1, inferior_registers.r_r1);
53 RF (R0_REGNUM + 2, inferior_registers.r_r2);
54 RF (R0_REGNUM + 3, inferior_registers.r_r3);
55 RF (R0_REGNUM + 4, inferior_registers.r_r4);
56 RF (R0_REGNUM + 5, inferior_registers.r_r5);
57 RF (R0_REGNUM + 6, inferior_registers.r_r6);
58 RF (R0_REGNUM + 7, inferior_registers.r_r7);
60 RF (SP_REGNUM, inferior_registers.r_sp);
61 RF (DEPRECATED_FP_REGNUM, inferior_registers.r_fp);
62 RF (PC_REGNUM, inferior_registers.r_pc);
63 RF (PS_REGNUM, inferior_registers.r_psr);
65 RF (FPS_REGNUM, inferior_fpregisters.r_fsr);
66 RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]);
67 RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]);
68 RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]);
69 RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]);
70 RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
71 RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
72 RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
73 RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
74 deprecated_registers_fetched ();
78 store_inferior_registers (int 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 (DEPRECATED_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, PIDGET (inferior_ptid),
108 (PTRACE_ARG3_TYPE) & inferior_registers, 0);
109 ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
110 (PTRACE_ARG3_TYPE) & inferior_fpregisters, 0);
114 /* XXX - Add this to machine/regs.h instead? */
121 /* Get registers from a core file. REG_ADDR is unused. */
123 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
124 unsigned int reg_addr)
126 struct coreregs *core_reg;
128 core_reg = (struct coreregs *) core_reg_sect;
131 * We have *all* registers
132 * in the first core section.
136 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 (DEPRECATED_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 deprecated_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, /* core_flavour */
176 default_check_format, /* check_format */
177 default_core_sniffer, /* core_sniffer */
178 fetch_core_registers, /* core_read_registers */
183 _initialize_ns32knbsd_nat (void)
185 deprecated_add_core_fns (&nat_core_fns);
190 * kernel_u_size() is not helpful on NetBSD because
191 * the "u" struct is NOT in the core dump file.
194 #ifdef FETCH_KCORE_REGISTERS
196 * Get registers from a kernel crash dump or live kernel.
197 * Called by kcore-nbsd.c:get_kcore_registers().
200 fetch_kcore_registers (struct pcb *pcb)
202 struct switchframe sf;
206 /* Integer registers */
207 if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf))
208 error ("Cannot read integer registers.");
210 /* We use the psr at kernel entry */
211 if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg))
212 error ("Cannot read processor status register.");
215 RF (R0_REGNUM + 0, dummy);
216 RF (R0_REGNUM + 1, dummy);
217 RF (R0_REGNUM + 2, dummy);
218 RF (R0_REGNUM + 3, sf.sf_r3);
219 RF (R0_REGNUM + 4, sf.sf_r4);
220 RF (R0_REGNUM + 5, sf.sf_r5);
221 RF (R0_REGNUM + 6, sf.sf_r6);
222 RF (R0_REGNUM + 7, sf.sf_r7);
224 dummy = pcb->pcb_kfp + 8;
225 RF (SP_REGNUM, dummy);
226 RF (DEPRECATED_FP_REGNUM, sf.sf_fp);
227 RF (PC_REGNUM, sf.sf_pc);
228 RF (PS_REGNUM, intreg.r_psr);
230 /* Floating point registers */
231 RF (FPS_REGNUM, pcb->pcb_fsr);
232 RF (FP0_REGNUM + 0, pcb->pcb_freg[0]);
233 RF (FP0_REGNUM + 2, pcb->pcb_freg[2]);
234 RF (FP0_REGNUM + 4, pcb->pcb_freg[4]);
235 RF (FP0_REGNUM + 6, pcb->pcb_freg[6]);
236 RF (LP0_REGNUM + 1, pcb->pcb_freg[1]);
237 RF (LP0_REGNUM + 3, pcb->pcb_freg[3]);
238 RF (LP0_REGNUM + 5, pcb->pcb_freg[5]);
239 RF (LP0_REGNUM + 7, pcb->pcb_freg[7]);
240 deprecated_registers_fetched ();
242 #endif /* FETCH_KCORE_REGISTERS */
250 /* Integer registers */
251 RF (R0_REGNUM + 0, null);
252 RF (R0_REGNUM + 1, null);
253 RF (R0_REGNUM + 2, null);
254 RF (R0_REGNUM + 3, null);
255 RF (R0_REGNUM + 4, null);
256 RF (R0_REGNUM + 5, null);
257 RF (R0_REGNUM + 6, null);
258 RF (R0_REGNUM + 7, null);
260 RF (SP_REGNUM, null);
261 RF (DEPRECATED_FP_REGNUM, null);
262 RF (PC_REGNUM, null);
263 RF (PS_REGNUM, null);
265 /* Floating point registers */
266 RF (FPS_REGNUM, zero);
267 RF (FP0_REGNUM + 0, zero);
268 RF (FP0_REGNUM + 2, zero);
269 RF (FP0_REGNUM + 4, zero);
270 RF (FP0_REGNUM + 6, zero);
271 RF (LP0_REGNUM + 0, zero);
272 RF (LP0_REGNUM + 1, zero);
273 RF (LP0_REGNUM + 2, zero);
274 RF (LP0_REGNUM + 3, zero);
278 /* Return number of args passed to a frame.
279 Can return -1, meaning no way to tell. */
282 frame_num_args (struct frame_info *fi)
284 CORE_ADDR enter_addr;
290 if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000)
292 /* main is always called with three args */
295 enter_addr = ns32k_get_enter_addr (fi->pc);
298 argp = (enter_addr == 1
299 ? DEPRECATED_SAVED_PC_AFTER_CALL (fi)
300 : DEPRECATED_FRAME_SAVED_PC (fi));
301 for (i = 0; i < 16; i++)
304 * After a bsr gcc may emit the following instructions
305 * to remove the arguments from the stack:
306 * cmpqd 0,tos - to remove 4 bytes from the stack
307 * cmpd tos,tos - to remove 8 bytes from the stack
308 * adjsp[bwd] -n - to remove n bytes from the stack
309 * Gcc sometimes delays emitting these instructions and
310 * may even throw a branch between our feet.
312 inst = read_memory_integer (argp, 4);
313 args = read_memory_integer (argp + 2, 4);
314 if ((inst & 0xff) == 0xea)
316 args = ((inst >> 8) & 0xffffff) | (args << 24);
325 args = ntohs (args & 0xffff);
339 if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
341 else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
343 else if ((inst & 0xfffc) == 0xa57c)
348 args = ((args & 0xff) + 0x80);
351 args = ((ntohs (args) & 0xffff) + 0x8000);
354 args = -ntohl (args);
359 if (args / 4 > 10 || (args & 3) != 0)