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, Boston, MA 02111-1307, USA. */
22 #ifdef FETCH_INFERIOR_REGISTERS
23 #include <sys/types.h>
24 #include <sys/ptrace.h>
25 #include <machine/reg.h>
26 #include <machine/frame.h>
30 fetch_inferior_registers(regno
)
33 struct reg inferior_registers
;
35 ptrace (PT_GETREGS
, inferior_pid
, (PTRACE_ARG3_TYPE
) &inferior_registers
, 0);
36 memcpy (®isters
[REGISTER_BYTE (0)], &inferior_registers
, 4*NUM_REGS
);
41 store_inferior_registers(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);
56 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, ignore
)
58 unsigned core_reg_size
;
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 (blockend
, regnum
)
112 /* The following condition is a kludge to get at the proper register map
113 depending upon the state of pcb_flag.
114 The proper condition would be
115 if (u.u_pcb.pcb_flag & FM_TRAP)
116 but that would require a ptrace call here and wouldn't work
119 if (blockend
< 0x1fcc)
120 return (blockend
+ 4 * tregmap
[regnum
]);
122 return (blockend
+ 4 * sregmap
[regnum
]);
125 #endif /* !FETCH_INFERIOR_REGISTERS */
128 #include "language.h" /* for local_hex_string */
129 #include "floatformat.h"
131 #include <sys/param.h>
134 #include <sys/ioctl.h>
139 #include <sys/time.h>
140 #include <sys/resource.h>
142 #define curpcb Xcurpcb /* XXX avoid leaking declaration from pcb.h */
143 #include <sys/user.h>
145 #include <sys/file.h>
146 #include "gdb_stat.h"
147 #include <sys/ptrace.h>
149 extern void print_387_control_word (); /* i387-tdep.h */
150 extern void print_387_status_word ();
152 #define fpstate save87
153 #define U_FPSTATE(u) u.u_pcb.pcb_savefpu
157 unsigned short control
;
159 unsigned short status
;
164 unsigned short code_seg
;
165 unsigned short opcode
;
166 unsigned long operand
;
167 unsigned short operand_seg
;
169 unsigned char regs
[8][10];
173 print_387_status (status
, ep
)
174 unsigned short status
;
182 bothstatus
= ((status
!= 0) && (ep
->status
!= 0));
186 printf_unfiltered ("u: ");
187 print_387_status_word ((unsigned int)status
);
193 printf_unfiltered ("e: ");
194 print_387_status_word ((unsigned int)ep
->status
);
197 print_387_control_word ((unsigned int)ep
->control
);
198 printf_unfiltered ("last exception: ");
199 printf_unfiltered ("opcode %s; ", local_hex_string(ep
->opcode
));
200 printf_unfiltered ("pc %s:", local_hex_string(ep
->code_seg
));
201 printf_unfiltered ("%s; ", local_hex_string(ep
->eip
));
202 printf_unfiltered ("operand %s", local_hex_string(ep
->operand_seg
));
203 printf_unfiltered (":%s\n", local_hex_string(ep
->operand
));
205 top
= (ep
->status
>> 11) & 7;
207 printf_unfiltered ("regno tag msb lsb value\n");
208 for (fpreg
= 7; fpreg
>= 0; fpreg
--)
212 printf_unfiltered ("%s %d: ", fpreg
== top
? "=>" : " ", fpreg
);
214 switch ((ep
->tag
>> (fpreg
* 2)) & 3)
216 case 0: printf_unfiltered ("valid "); break;
217 case 1: printf_unfiltered ("zero "); break;
218 case 2: printf_unfiltered ("trap "); break;
219 case 3: printf_unfiltered ("empty "); break;
221 for (i
= 9; i
>= 0; i
--)
222 printf_unfiltered ("%02x", ep
->regs
[fpreg
][i
]);
224 floatformat_to_double(&floatformat_i387_ext
, (char *) ep
->regs
[fpreg
],
226 printf_unfiltered (" %g\n", val
);
232 struct user u
; /* just for address computations */
234 /* fpstate defined in <sys/user.h> */
235 struct fpstate
*fpstatep
;
236 char buf
[sizeof (struct fpstate
) + 2 * sizeof (int)];
239 unsigned int rounded_addr
;
240 unsigned int rounded_size
;
241 /*extern int corechan;*/
243 extern int inferior_pid
;
245 uaddr
= (char *)&U_FPSTATE(u
) - (char *)&u
;
250 rounded_addr
= uaddr
& -sizeof (int);
251 rounded_size
= (((uaddr
+ sizeof (struct fpstate
)) - uaddr
) +
252 sizeof (int) - 1) / sizeof (int);
253 skip
= uaddr
- rounded_addr
;
256 for (i
= 0; i
< rounded_size
; i
++)
258 *ip
++ = ptrace (PT_READ_U
, inferior_pid
, (caddr_t
)rounded_addr
, 0);
259 rounded_addr
+= sizeof (int);
264 printf("float info: can't do a core file (yet)\n");
267 if (lseek (corechan
, uaddr
, 0) < 0)
268 perror_with_name ("seek on core file");
269 if (myread (corechan
, buf
, sizeof (struct fpstate
)) < 0)
270 perror_with_name ("read from core file");
275 print_387_status (0, (struct env387
*)buf
);
281 return (sizeof (struct user
));
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