1 /* Low level interface to ptrace, for the remote server for GDB.
2 Copyright (C) 1995 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 * $DragonFly: src/gnu/usr.bin/binutils215/gdbserver/Attic/low-fbsd.c,v 1.1 2004/12/20 13:14:44 asmodai Exp $
29 #include <sys/param.h>
33 #include <sys/ioctl.h>
38 /***************Begin MY defs*********************/
40 char registers[REGISTER_BYTES];
42 /* Index within `registers' of the first byte of the space for
46 char buf2[MAX_REGISTER_RAW_SIZE];
47 /***************End MY defs*********************/
49 #include <sys/ptrace.h>
50 #include <machine/reg.h>
52 extern char **environ;
53 extern int inferior_pid;
54 void quit (), perror_with_name ();
57 /* Start an inferior process and returns its pid.
58 ALLARGS is a vector of program-name and args.
59 ENV is the environment vector to pass. */
62 create_inferior (program, allargs)
70 perror_with_name ("fork");
74 ptrace (PT_TRACE_ME, 0, 0, 0);
76 execv (program, allargs);
78 fprintf (stderr, "Cannot exec %s: %s.\n", program, strerror(errno));
86 /* Kill the inferior process. Make us have no inferior. */
91 if (inferior_pid == 0)
93 ptrace (PT_KILL, inferior_pid, 0, 0);
95 /*************inferior_died ();****VK**************/
98 /* Return nonzero if the given thread is still alive. */
106 /* Wait for process, returns status */
116 if (pid != inferior_pid)
117 perror_with_name ("wait");
121 fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
123 return ((unsigned char) WEXITSTATUS (w));
125 else if (!WIFSTOPPED (w))
127 fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
129 return ((unsigned char) WTERMSIG (w));
132 fetch_inferior_registers (0);
135 return ((unsigned char) WSTOPSIG (w));
138 /* Resume execution of the inferior process.
139 If STEP is nonzero, single-step it.
140 If SIGNAL is nonzero, give it that signal. */
143 myresume (step, signal)
148 ptrace (step ? PT_STEP : PT_CONTINUE, inferior_pid,
149 (PTRACE_ARG3_TYPE) 1, signal);
151 perror_with_name ("ptrace");
154 #if defined(__i386__)
156 /* this table must line up with REGISTER_NAMES in tm-i386v.h */
157 /* symbols like 'tEAX' come from <machine/reg.h> */
158 static int tregmap[] =
160 tEAX, tECX, tEDX, tEBX,
161 tESP, tEBP, tESI, tEDI,
162 tEIP, tEFLAGS, tCS, tSS,
166 static struct save87 pcb_savefpu;
169 fetch_inferior_registers (regno)
172 struct reg inferior_registers; /* ptrace order, not gcc/gdb order */
175 ptrace (PT_GETREGS, inferior_pid,
176 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
178 for (r = 0; r < NUM_REGS; r++)
179 memcpy (®isters[REGISTER_BYTE (r)], ((int *)&inferior_registers) + tregmap[r], 4);
183 store_inferior_registers (regno)
186 struct reg inferior_registers; /* ptrace order, not gcc/gdb order */
189 ptrace (PT_GETREGS, inferior_pid,
190 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
192 for (r = 0; r < NUM_REGS; r++)
193 memcpy (((int *)&inferior_registers) + tregmap[r], ®isters[REGISTER_BYTE (r)], 4);
195 ptrace (PT_SETREGS, inferior_pid,
196 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
199 #elif defined(__alpha__)
202 fetch_inferior_registers (regno)
205 struct reg regs; /* ptrace order, not gcc/gdb order */
209 ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
210 ptrace (PT_GETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
212 for (r = 0; r < 31; r++)
213 memcpy (®isters[REGISTER_BYTE (r)],
214 ®s.r_regs[r], sizeof(u_int64_t));
215 for (r = 0; r < 32; r++)
216 memcpy (®isters[REGISTER_BYTE (r + FP0_REGNUM)],
217 &fpregs.fpr_regs[r], sizeof(u_int64_t));
218 memcpy (®isters[REGISTER_BYTE (PC_REGNUM)],
219 ®s.r_regs[31], sizeof(u_int64_t));
221 memset (®isters[REGISTER_BYTE (ZERO_REGNUM)], 0, sizeof(u_int64_t));
222 memset (®isters[REGISTER_BYTE (FP_REGNUM)], 0, sizeof(u_int64_t));
226 store_inferior_registers (regno)
229 struct reg regs; /* ptrace order, not gcc/gdb order */
233 for (r = 0; r < 31; r++)
234 memcpy (®s.r_regs[r],
235 ®isters[REGISTER_BYTE (r)], sizeof(u_int64_t));
236 for (r = 0; r < 32; r++)
237 memcpy (&fpregs.fpr_regs[r],
238 ®isters[REGISTER_BYTE (r + FP0_REGNUM)], sizeof(u_int64_t));
239 memcpy (®s.r_regs[31],
240 ®isters[REGISTER_BYTE (PC_REGNUM)], sizeof(u_int64_t));
242 ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) ®s, 0);
243 ptrace (PT_SETFPREGS, inferior_pid, (PTRACE_ARG3_TYPE) &fpregs, 0);
249 /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory
250 in the NEW_SUN_PTRACE case.
251 It ought to be straightforward. But it appears that writing did
252 not write the data that I specified. I cannot understand where
253 it got the data that it actually did write. */
255 /* Copy LEN bytes from inferior's memory starting at MEMADDR
256 to debugger memory starting at MYADDR. */
258 read_inferior_memory (memaddr, myaddr, len)
264 /* Round starting address down to longword boundary. */
265 register CORE_ADDR addr = memaddr & -sizeof (int);
266 /* Round ending address up; get number of longwords that makes. */
268 = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
269 /* Allocate buffer of that many longwords. */
270 register int *buffer = (int *) alloca (count * sizeof (int));
272 /* Read all the longwords */
273 for (i = 0; i < count; i++, addr += sizeof (int))
275 buffer[i] = ptrace (PT_READ_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, 0);
278 /* Copy appropriate bytes out of the buffer. */
279 memcpy (myaddr, (char *) buffer + (memaddr & (sizeof (int) - 1)), len);
282 /* Copy LEN bytes of data from debugger memory at MYADDR
283 to inferior's memory at MEMADDR.
284 On failure (cannot write the inferior)
285 returns the value of errno. */
288 write_inferior_memory (memaddr, myaddr, len)
294 /* Round starting address down to longword boundary. */
295 register CORE_ADDR addr = memaddr & -sizeof (int);
296 /* Round ending address up; get number of longwords that makes. */
298 = (((memaddr + len) - addr) + sizeof (int) - 1) / sizeof (int);
299 /* Allocate buffer of that many longwords. */
300 register int *buffer = (int *) alloca (count * sizeof (int));
303 /* Fill start and end extra bytes of buffer with existing memory data. */
305 buffer[0] = ptrace (PT_READ_I, inferior_pid,
306 (PTRACE_ARG3_TYPE) addr, 0);
311 = ptrace (PT_READ_I, inferior_pid,
312 (PTRACE_ARG3_TYPE) addr + (count - 1) * sizeof (int), 0);
315 /* Copy data to be written over corresponding part of buffer */
317 memcpy ((char *) buffer + (memaddr & (sizeof (int) - 1)), myaddr, len);
319 /* Write the entire buffer. */
321 for (i = 0; i < count; i++, addr += sizeof (int))
324 ptrace (PT_WRITE_I, inferior_pid, (PTRACE_ARG3_TYPE) addr, buffer[i]);
341 return inferior_pid != 0;