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. */
33 #ifdef HAVE_SYS_PROCFS_H
35 #include <sys/procfs.h>
37 /* Prototypes for supply_gregset etc. */
40 /* The /proc interface divides the target machine's register set up into
41 two different sets, the general register set (gregset) and the floating
42 point register set (fpregset). For each set, there is an ioctl to get
43 the current register set and another ioctl to set the current values.
45 The actual structure passed through the ioctl interface is, of course,
46 naturally machine dependent, and is different for each set of registers.
47 For the i386 for example, the general register set is typically defined
50 typedef int gregset_t[19]; (in <sys/regset.h>)
52 #define GS 0 (in <sys/reg.h>)
58 and the floating point set by:
60 typedef struct fpregset
64 struct fpchip_state // fp extension state //
66 int state[27]; // 287/387 saved state //
67 int status; // status word saved at exception //
69 struct fp_emul_space // for emulators //
74 int f_fpregs[62]; // union of the above //
76 long f_wregs[33]; // saved weitek state //
79 These routines provide the packing and unpacking of gregset_t and
80 fpregset_t formatted data.
86 /* This is a duplicate of the table in i386-xdep.c. */
96 /* Prototypes for local functions */
98 void fill_gregset (gregset_t
*, int);
100 void supply_gregset (gregset_t
*);
102 void supply_fpregset (fpregset_t
*);
104 void fill_fpregset (fpregset_t
*, int);
107 /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
108 being less than or equal to the number of registers that can be stored
109 in a gregset_t. Note that with the current scheme there will typically
110 be more registers actually stored in a gregset_t that what we know
111 about. This is bogus and should be fixed. */
113 /* Given a pointer to a general register set in /proc format (gregset_t *),
114 unpack the register contents and supply them as gdb's idea of the current
118 supply_gregset (gregset_t
*gregsetp
)
121 register greg_t
*regp
= (greg_t
*) gregsetp
;
124 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
126 supply_register (regi
, (char *) (regp
+ regmap
[regi
]));
131 fill_gregset (gregset_t
*gregsetp
, int regno
)
134 register greg_t
*regp
= (greg_t
*) gregsetp
;
137 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
139 if ((regno
== -1) || (regno
== regi
))
141 *(regp
+ regmap
[regi
]) = *(int *) ®isters
[REGISTER_BYTE (regi
)];
146 #endif /* HAVE_GREGSET_T */
148 #if defined (HAVE_FPREGSET_T)
150 /* Given a pointer to a floating point register set in /proc format
151 (fpregset_t *), unpack the register contents and supply them as gdb's
152 idea of the current floating point register values. */
154 /* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */
155 static const int freg_offset_map
[] =
157 #if !defined(FPREGSET_FSAVE_OFFSET)
158 #define FPREGSET_FSAVE_OFFSET 0
160 FPREGSET_FSAVE_OFFSET
+ 28 + 0 * 10,
161 FPREGSET_FSAVE_OFFSET
+ 28 + 1 * 10,
162 FPREGSET_FSAVE_OFFSET
+ 28 + 2 * 10,
163 FPREGSET_FSAVE_OFFSET
+ 28 + 3 * 10,
164 FPREGSET_FSAVE_OFFSET
+ 28 + 4 * 10,
165 FPREGSET_FSAVE_OFFSET
+ 28 + 5 * 10,
166 FPREGSET_FSAVE_OFFSET
+ 28 + 6 * 10,
167 FPREGSET_FSAVE_OFFSET
+ 28 + 7 * 10,
168 FPREGSET_FSAVE_OFFSET
+ 0,
169 FPREGSET_FSAVE_OFFSET
+ 4,
170 FPREGSET_FSAVE_OFFSET
+ 8,
171 FPREGSET_FSAVE_OFFSET
+ 16,
172 FPREGSET_FSAVE_OFFSET
+ 12,
173 FPREGSET_FSAVE_OFFSET
+ 24,
174 FPREGSET_FSAVE_OFFSET
+ 20,
175 FPREGSET_FSAVE_OFFSET
+ 16
179 supply_fpregset (fpregset_t
*fpregsetp
)
185 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
189 char *from
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
191 if (regi
== FCS_REGNUM
)
193 tval
= extract_unsigned_integer (from
, 4) & 0xffff;
194 store_unsigned_integer (tbuf
, 4, tval
);
195 supply_register (regi
, tbuf
);
197 else if (regi
== FOP_REGNUM
)
199 tval
= (extract_unsigned_integer (from
, 4) >> 16) & ((1 << 11) - 1);
200 store_unsigned_integer (tbuf
, 4, tval
);
201 supply_register (regi
, tbuf
);
204 supply_register (regi
, from
);
208 /* Given a pointer to a floating point register set in /proc format
209 (fpregset_t *), update the register specified by REGNO from gdb's idea
210 of the current floating point register set. If REGNO is -1, update
214 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
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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