1 /* Native-dependent code for BSD Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000,
3 2001 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. */
24 #ifdef FETCH_INFERIOR_REGISTERS
25 #include <sys/types.h>
26 #include <sys/ptrace.h>
27 #include <machine/reg.h>
28 #include <machine/frame.h>
30 #include "gdbcore.h" /* for registers_fetched() */
34 fetch_inferior_registers (int regno)
36 struct reg inferior_registers;
38 ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
39 memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers, 4 * NUM_REGS);
44 store_inferior_registers (int regno)
46 struct reg inferior_registers;
48 memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)], 4 * NUM_REGS);
49 ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
59 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
62 struct md_core *core_reg = (struct md_core *) core_reg_sect;
64 /* integer registers */
65 memcpy (®isters[REGISTER_BYTE (0)], &core_reg->intreg,
67 /* floating point registers */
73 #include <machine/reg.h>
75 /* this table must line up with REGISTER_NAMES in tm-i386.h */
76 /* symbols like 'tEAX' come from <machine/reg.h> */
77 static int tregmap[] =
79 tEAX, tECX, tEDX, tEBX,
80 tESP, tEBP, tESI, tEDI,
81 tEIP, tEFLAGS, tCS, tSS
85 static int sregmap[] =
87 sEAX, sECX, sEDX, sEBX,
88 sESP, sEBP, sESI, sEDI,
89 sEIP, sEFLAGS, sCS, sSS
93 /* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
94 ones aren't around, use the t* ones for sregmap too. */
96 static int sregmap[] =
98 tEAX, tECX, tEDX, tEBX,
99 tESP, tEBP, tESI, tEDI,
100 tEIP, tEFLAGS, tCS, tSS
104 /* blockend is the value of u.u_ar0, and points to the
105 place where ES is stored. */
108 i386_register_u_addr (int blockend, int regnum)
110 /* The following condition is a kludge to get at the proper register map
111 depending upon the state of pcb_flag.
112 The proper condition would be
113 if (u.u_pcb.pcb_flag & FM_TRAP)
114 but that would require a ptrace call here and wouldn't work
117 if (blockend < 0x1fcc)
118 return (blockend + 4 * tregmap[regnum]);
120 return (blockend + 4 * sregmap[regnum]);
123 #endif /* !FETCH_INFERIOR_REGISTERS */
126 #include "expression.h"
127 #include "language.h" /* for local_hex_string */
128 #include "floatformat.h"
130 #include <sys/param.h>
133 #include <sys/ioctl.h>
138 #include <sys/time.h>
139 #include <sys/resource.h>
141 #define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
142 #include <sys/user.h>
144 #include <sys/file.h>
145 #include "gdb_stat.h"
146 #include <sys/ptrace.h>
148 extern void print_387_control_word (); /* i387-tdep.h */
149 extern void print_387_status_word ();
151 #define fpstate save87
152 #define U_FPSTATE(u) u.u_pcb.pcb_savefpu
156 unsigned short control;
158 unsigned short status;
163 unsigned short code_seg;
164 unsigned short opcode;
165 unsigned long operand;
166 unsigned short operand_seg;
168 unsigned char regs[8][10];
172 print_387_status (unsigned short status, struct env387 *ep)
179 bothstatus = ((status != 0) && (ep->status != 0));
183 printf_unfiltered ("u: ");
184 print_387_status_word ((unsigned int) status);
190 printf_unfiltered ("e: ");
191 print_387_status_word ((unsigned int) ep->status);
194 print_387_control_word ((unsigned int) ep->control);
195 printf_unfiltered ("last exception: ");
196 printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
197 printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
198 printf_unfiltered ("%s; ", local_hex_string (ep->eip));
199 printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
200 printf_unfiltered (":%s\n", local_hex_string (ep->operand));
202 top = (ep->status >> 11) & 7;
204 printf_unfiltered ("regno tag msb lsb value\n");
205 for (fpreg = 7; fpreg >= 0; fpreg--)
209 printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
211 switch ((ep->tag >> (fpreg * 2)) & 3)
214 printf_unfiltered ("valid ");
217 printf_unfiltered ("zero ");
220 printf_unfiltered ("trap ");
223 printf_unfiltered ("empty ");
226 for (i = 9; i >= 0; i--)
227 printf_unfiltered ("%02x", ep->regs[fpreg][i]);
229 floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
231 printf_unfiltered (" %g\n", val);
235 i386_float_info (void)
237 struct user u; /* just for address computations */
239 /* fpstate defined in <sys/user.h> */
240 struct fpstate *fpstatep;
241 char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
244 unsigned int rounded_addr;
245 unsigned int rounded_size;
246 /*extern int corechan; */
248 extern int inferior_pid;
250 uaddr = (char *) &U_FPSTATE (u) - (char *) &u;
255 rounded_addr = uaddr & -sizeof (int);
256 rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
257 sizeof (int) - 1) / sizeof (int);
258 skip = uaddr - rounded_addr;
261 for (i = 0; i < rounded_size; i++)
263 *ip++ = ptrace (PT_READ_U, inferior_pid, (caddr_t) rounded_addr, 0);
264 rounded_addr += sizeof (int);
269 printf ("float info: can't do a core file (yet)\n");
272 if (lseek (corechan, uaddr, 0) < 0)
273 perror_with_name ("seek on core file");
274 if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
275 perror_with_name ("read from core file");
280 print_387_status (0, (struct env387 *) buf);
286 return (sizeof (struct user));