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
));
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