1 /* Native-dependent code for SVR4 Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000, 2001
3 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. */
32 #ifdef HAVE_SYS_PROCFS_H
34 #include <sys/procfs.h>
36 /* Prototypes for supply_gregset etc. */
39 /* The /proc interface divides the target machine's register set up into
40 two different sets, the general register set (gregset) and the floating
41 point register set (fpregset). For each set, there is an ioctl to get
42 the current register set and another ioctl to set the current values.
44 The actual structure passed through the ioctl interface is, of course,
45 naturally machine dependent, and is different for each set of registers.
46 For the i386 for example, the general register set is typically defined
49 typedef int gregset_t[19]; (in <sys/regset.h>)
51 #define GS 0 (in <sys/reg.h>)
57 and the floating point set by:
59 typedef struct fpregset
63 struct fpchip_state // fp extension state //
65 int state[27]; // 287/387 saved state //
66 int status; // status word saved at exception //
68 struct fp_emul_space // for emulators //
73 int f_fpregs[62]; // union of the above //
75 long f_wregs[33]; // saved weitek state //
78 These routines provide the packing and unpacking of gregset_t and
79 fpregset_t formatted data.
85 /* This is a duplicate of the table in i386-xdep.c. */
95 /* Prototypes for local functions */
97 void fill_gregset (gregset_t
*, int);
99 void supply_gregset (gregset_t
*);
101 void supply_fpregset (fpregset_t
*);
103 void fill_fpregset (fpregset_t
*, int);
106 /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
107 being less than or equal to the number of registers that can be stored
108 in a gregset_t. Note that with the current scheme there will typically
109 be more registers actually stored in a gregset_t that what we know
110 about. This is bogus and should be fixed. */
112 /* Given a pointer to a general register set in /proc format (gregset_t *),
113 unpack the register contents and supply them as gdb's idea of the current
117 supply_gregset (gregset_t
*gregsetp
)
120 register greg_t
*regp
= (greg_t
*) gregsetp
;
123 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
125 supply_register (regi
, (char *) (regp
+ regmap
[regi
]));
130 fill_gregset (gregset_t
*gregsetp
, int regno
)
133 register greg_t
*regp
= (greg_t
*) gregsetp
;
136 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
138 if ((regno
== -1) || (regno
== regi
))
140 *(regp
+ regmap
[regi
]) = *(int *) ®isters
[REGISTER_BYTE (regi
)];
145 #endif /* HAVE_GREGSET_T */
147 #if defined (HAVE_FPREGSET_T)
149 /* Given a pointer to a floating point register set in /proc format
150 (fpregset_t *), unpack the register contents and supply them as gdb's
151 idea of the current floating point register values. */
153 /* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */
154 static const int freg_offset_map
[] =
156 #if !defined(FPREGSET_FSAVE_OFFSET)
157 #define FPREGSET_FSAVE_OFFSET 0
159 FPREGSET_FSAVE_OFFSET
+ 28 + 0 * 10,
160 FPREGSET_FSAVE_OFFSET
+ 28 + 1 * 10,
161 FPREGSET_FSAVE_OFFSET
+ 28 + 2 * 10,
162 FPREGSET_FSAVE_OFFSET
+ 28 + 3 * 10,
163 FPREGSET_FSAVE_OFFSET
+ 28 + 4 * 10,
164 FPREGSET_FSAVE_OFFSET
+ 28 + 5 * 10,
165 FPREGSET_FSAVE_OFFSET
+ 28 + 6 * 10,
166 FPREGSET_FSAVE_OFFSET
+ 28 + 7 * 10,
167 FPREGSET_FSAVE_OFFSET
+ 0,
168 FPREGSET_FSAVE_OFFSET
+ 4,
169 FPREGSET_FSAVE_OFFSET
+ 8,
170 FPREGSET_FSAVE_OFFSET
+ 16,
171 FPREGSET_FSAVE_OFFSET
+ 12,
172 FPREGSET_FSAVE_OFFSET
+ 24,
173 FPREGSET_FSAVE_OFFSET
+ 20,
174 FPREGSET_FSAVE_OFFSET
+ 16
178 supply_fpregset (fpregset_t
*fpregsetp
)
184 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
188 char *from
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
190 if (regi
== FCS_REGNUM
)
192 tval
= extract_unsigned_integer (from
, 4) & 0xffff;
193 store_unsigned_integer (tbuf
, 4, tval
);
194 supply_register (regi
, tbuf
);
196 else if (regi
== FOP_REGNUM
)
198 tval
= (extract_unsigned_integer (from
, 4) >> 16) & ((1 << 11) - 1);
199 store_unsigned_integer (tbuf
, 4, tval
);
200 supply_register (regi
, tbuf
);
203 supply_register (regi
, from
);
207 /* Given a pointer to a floating point register set in /proc format
208 (fpregset_t *), update the register specified by REGNO from gdb's idea
209 of the current floating point register set. If REGNO is -1, update
213 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
219 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
221 if ((regno
== -1) || (regno
== regi
))
223 char *to
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
224 char *from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
228 if (regi
== FCS_REGNUM
)
230 valto
= extract_unsigned_integer (to
, 4);
231 valfrom
= extract_unsigned_integer (from
, 4);
232 valto
= (valto
& ~0xffff) | (valfrom
& 0xffff);
233 store_unsigned_integer (to
, 4, valto
);
235 else if (regi
== FOP_REGNUM
)
237 valto
= extract_unsigned_integer (to
, 4);
238 valfrom
= extract_unsigned_integer (from
, 4);
239 valto
= (valto
& 0xffff) | ((valfrom
& ((1 << 11) - 1)) << 16);
240 store_unsigned_integer (to
, 4, valto
);
244 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
250 #endif /* defined (HAVE_FPREGSET_T) */
252 #endif /* HAVE_SYS_PROCFS_H */
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