056ea7f3ba21c1427f86b739387344803c746f58
1 /* Native-dependent code for SVR4 Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1996, 1998 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. */
30 #ifdef HAVE_SYS_PROCFS_H
32 #include <sys/procfs.h>
34 /* The /proc interface divides the target machine's register set up into
35 two different sets, the general register set (gregset) and the floating
36 point register set (fpregset). For each set, there is an ioctl to get
37 the current register set and another ioctl to set the current values.
39 The actual structure passed through the ioctl interface is, of course,
40 naturally machine dependent, and is different for each set of registers.
41 For the i386 for example, the general register set is typically defined
44 typedef int gregset_t[19]; (in <sys/regset.h>)
46 #define GS 0 (in <sys/reg.h>)
52 and the floating point set by:
54 typedef struct fpregset
58 struct fpchip_state // fp extension state //
60 int state[27]; // 287/387 saved state //
61 int status; // status word saved at exception //
63 struct fp_emul_space // for emulators //
68 int f_fpregs[62]; // union of the above //
70 long f_wregs[33]; // saved weitek state //
73 These routines provide the packing and unpacking of gregset_t and
74 fpregset_t formatted data.
80 /* This is a duplicate of the table in i386-xdep.c. */
90 /* Prototypes for local functions */
92 void fill_gregset
PARAMS ((gregset_t
*, int));
94 void supply_gregset
PARAMS ((gregset_t
*));
96 void supply_fpregset
PARAMS ((fpregset_t
*));
98 void fill_fpregset
PARAMS ((fpregset_t
*, int));
101 /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
102 being less than or equal to the number of registers that can be stored
103 in a gregset_t. Note that with the current scheme there will typically
104 be more registers actually stored in a gregset_t that what we know
105 about. This is bogus and should be fixed. */
107 /* Given a pointer to a general register set in /proc format (gregset_t *),
108 unpack the register contents and supply them as gdb's idea of the current
112 supply_gregset (gregsetp
)
116 register greg_t
*regp
= (greg_t
*) gregsetp
;
119 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
121 supply_register (regi
, (char *) (regp
+ regmap
[regi
]));
126 fill_gregset (gregsetp
, regno
)
131 register greg_t
*regp
= (greg_t
*) gregsetp
;
134 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
136 if ((regno
== -1) || (regno
== regi
))
138 *(regp
+ regmap
[regi
]) = *(int *) ®isters
[REGISTER_BYTE (regi
)];
143 #endif /* HAVE_GREGSET_T */
145 #if defined (HAVE_FPREGSET_T)
147 /* Given a pointer to a floating point register set in /proc format
148 (fpregset_t *), unpack the register contents and supply them as gdb's
149 idea of the current floating point register values. */
151 /* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */
152 static const int freg_offset_map
[] =
154 #if !defined(FPREGSET_FSAVE_OFFSET)
155 #define FPREGSET_FSAVE_OFFSET 0
157 FPREGSET_FSAVE_OFFSET
+ 28 + 0 * 10,
158 FPREGSET_FSAVE_OFFSET
+ 28 + 1 * 10,
159 FPREGSET_FSAVE_OFFSET
+ 28 + 2 * 10,
160 FPREGSET_FSAVE_OFFSET
+ 28 + 3 * 10,
161 FPREGSET_FSAVE_OFFSET
+ 28 + 4 * 10,
162 FPREGSET_FSAVE_OFFSET
+ 28 + 5 * 10,
163 FPREGSET_FSAVE_OFFSET
+ 28 + 6 * 10,
164 FPREGSET_FSAVE_OFFSET
+ 28 + 7 * 10,
165 FPREGSET_FSAVE_OFFSET
+ 0,
166 FPREGSET_FSAVE_OFFSET
+ 4,
167 FPREGSET_FSAVE_OFFSET
+ 8,
168 FPREGSET_FSAVE_OFFSET
+ 16,
169 FPREGSET_FSAVE_OFFSET
+ 12,
170 FPREGSET_FSAVE_OFFSET
+ 24,
171 FPREGSET_FSAVE_OFFSET
+ 20,
172 FPREGSET_FSAVE_OFFSET
+ 16
176 supply_fpregset (fpregsetp
)
177 fpregset_t
*fpregsetp
;
183 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
187 char *from
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
189 if (regi
== FCS_REGNUM
)
191 tval
= extract_unsigned_integer (from
, 4) & 0xffff;
192 store_unsigned_integer (tbuf
, 4, tval
);
193 supply_register (regi
, tbuf
);
195 else if (regi
== FOP_REGNUM
)
197 tval
= (extract_unsigned_integer (from
, 4) >> 16) & ((1 << 11) - 1);
198 store_unsigned_integer (tbuf
, 4, tval
);
199 supply_register (regi
, tbuf
);
202 supply_register (regi
, from
);
206 /* Given a pointer to a floating point register set in /proc format
207 (fpregset_t *), update the register specified by REGNO from gdb's idea
208 of the current floating point register set. If REGNO is -1, update
212 fill_fpregset (fpregsetp
, regno
)
213 fpregset_t
*fpregsetp
;
220 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
222 if ((regno
== -1) || (regno
== regi
))
224 char *to
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
225 char *from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
229 if (regi
== FCS_REGNUM
)
231 valto
= extract_unsigned_integer (to
, 4);
232 valfrom
= extract_unsigned_integer (from
, 4);
233 valto
= (valto
& ~0xffff) | (valfrom
& 0xffff);
234 store_unsigned_integer (to
, 4, valto
);
236 else if (regi
== FOP_REGNUM
)
238 valto
= extract_unsigned_integer (to
, 4);
239 valfrom
= extract_unsigned_integer (from
, 4);
240 valto
= (valto
& 0xffff) | ((valfrom
& ((1 << 11) - 1)) << 16);
241 store_unsigned_integer (to
, 4, valto
);
245 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
251 #endif /* defined (HAVE_FPREGSET_T) */
253 #endif /* HAVE_SYS_PROCFS_H */
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