1 /* Native-dependent code for BSD Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 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. */
23 #ifdef FETCH_INFERIOR_REGISTERS
24 #include <sys/types.h>
25 #include <sys/ptrace.h>
26 #include <machine/reg.h>
27 #include <machine/frame.h>
29 #include "gdbcore.h" /* for registers_fetched() */
32 fetch_inferior_registers (int regno)
34 struct reg inferior_registers;
36 ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
37 memcpy (®isters[REGISTER_BYTE (0)], &inferior_registers, 4 * NUM_REGS);
42 store_inferior_registers (int regno)
44 struct reg inferior_registers;
46 memcpy (&inferior_registers, ®isters[REGISTER_BYTE (0)], 4 * NUM_REGS);
47 ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) & inferior_registers, 0);
57 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
60 struct md_core *core_reg = (struct md_core *) core_reg_sect;
62 /* integer registers */
63 memcpy (®isters[REGISTER_BYTE (0)], &core_reg->intreg,
65 /* floating point registers */
71 #include <machine/reg.h>
73 /* this table must line up with REGISTER_NAMES in tm-i386.h */
74 /* symbols like 'tEAX' come from <machine/reg.h> */
75 static int tregmap[] =
77 tEAX, tECX, tEDX, tEBX,
78 tESP, tEBP, tESI, tEDI,
79 tEIP, tEFLAGS, tCS, tSS
83 static int sregmap[] =
85 sEAX, sECX, sEDX, sEBX,
86 sESP, sEBP, sESI, sEDI,
87 sEIP, sEFLAGS, sCS, sSS
91 /* FreeBSD has decided to collapse the s* and t* symbols. So if the s*
92 ones aren't around, use the t* ones for sregmap too. */
94 static int sregmap[] =
96 tEAX, tECX, tEDX, tEBX,
97 tESP, tEBP, tESI, tEDI,
98 tEIP, tEFLAGS, tCS, tSS
102 /* blockend is the value of u.u_ar0, and points to the
103 place where ES is stored. */
106 i386_register_u_addr (int blockend, int regnum)
108 /* The following condition is a kludge to get at the proper register map
109 depending upon the state of pcb_flag.
110 The proper condition would be
111 if (u.u_pcb.pcb_flag & FM_TRAP)
112 but that would require a ptrace call here and wouldn't work
115 if (blockend < 0x1fcc)
116 return (blockend + 4 * tregmap[regnum]);
118 return (blockend + 4 * sregmap[regnum]);
121 #endif /* !FETCH_INFERIOR_REGISTERS */
124 #include "expression.h"
125 #include "language.h" /* for local_hex_string */
126 #include "floatformat.h"
128 #include <sys/param.h>
131 #include <sys/ioctl.h>
136 #include <sys/time.h>
137 #include <sys/resource.h>
139 #define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
140 #include <sys/user.h>
142 #include <sys/file.h>
143 #include "gdb_stat.h"
144 #include <sys/ptrace.h>
146 extern void print_387_control_word (); /* i387-tdep.h */
147 extern void print_387_status_word ();
149 #define fpstate save87
150 #define U_FPSTATE(u) u.u_pcb.pcb_savefpu
154 unsigned short control;
156 unsigned short status;
161 unsigned short code_seg;
162 unsigned short opcode;
163 unsigned long operand;
164 unsigned short operand_seg;
166 unsigned char regs[8][10];
170 print_387_status (unsigned short status, struct env387 *ep)
177 bothstatus = ((status != 0) && (ep->status != 0));
181 printf_unfiltered ("u: ");
182 print_387_status_word ((unsigned int) status);
188 printf_unfiltered ("e: ");
189 print_387_status_word ((unsigned int) ep->status);
192 print_387_control_word ((unsigned int) ep->control);
193 printf_unfiltered ("last exception: ");
194 printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode));
195 printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg));
196 printf_unfiltered ("%s; ", local_hex_string (ep->eip));
197 printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg));
198 printf_unfiltered (":%s\n", local_hex_string (ep->operand));
200 top = (ep->status >> 11) & 7;
202 printf_unfiltered ("regno tag msb lsb value\n");
203 for (fpreg = 7; fpreg >= 0; fpreg--)
207 printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg);
209 switch ((ep->tag >> (fpreg * 2)) & 3)
212 printf_unfiltered ("valid ");
215 printf_unfiltered ("zero ");
218 printf_unfiltered ("trap ");
221 printf_unfiltered ("empty ");
224 for (i = 9; i >= 0; i--)
225 printf_unfiltered ("%02x", ep->regs[fpreg][i]);
227 floatformat_to_double (&floatformat_i387_ext, (char *) ep->regs[fpreg],
229 printf_unfiltered (" %g\n", val);
233 i386_float_info (void)
235 struct user u; /* just for address computations */
237 /* fpstate defined in <sys/user.h> */
238 struct fpstate *fpstatep;
239 char buf[sizeof (struct fpstate) + 2 * sizeof (int)];
242 unsigned int rounded_addr;
243 unsigned int rounded_size;
244 /*extern int corechan; */
246 extern int inferior_pid;
248 uaddr = (char *) &U_FPSTATE (u) - (char *) &u;
253 rounded_addr = uaddr & -sizeof (int);
254 rounded_size = (((uaddr + sizeof (struct fpstate)) - uaddr) +
255 sizeof (int) - 1) / sizeof (int);
256 skip = uaddr - rounded_addr;
259 for (i = 0; i < rounded_size; i++)
261 *ip++ = ptrace (PT_READ_U, inferior_pid, (caddr_t) rounded_addr, 0);
262 rounded_addr += sizeof (int);
267 printf ("float info: can't do a core file (yet)\n");
270 if (lseek (corechan, uaddr, 0) < 0)
271 perror_with_name ("seek on core file");
272 if (myread (corechan, buf, sizeof (struct fpstate)) < 0)
273 perror_with_name ("read from core file");
278 print_387_status (0, (struct env387 *) buf);
284 return (sizeof (struct user));