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 /* Prototypes for supply_gregset etc. */
37 /* The /proc interface divides the target machine's register set up into
38 two different sets, the general register set (gregset) and the floating
39 point register set (fpregset). For each set, there is an ioctl to get
40 the current register set and another ioctl to set the current values.
42 The actual structure passed through the ioctl interface is, of course,
43 naturally machine dependent, and is different for each set of registers.
44 For the i386 for example, the general register set is typically defined
47 typedef int gregset_t[19]; (in <sys/regset.h>)
49 #define GS 0 (in <sys/reg.h>)
55 and the floating point set by:
57 typedef struct fpregset
61 struct fpchip_state // fp extension state //
63 int state[27]; // 287/387 saved state //
64 int status; // status word saved at exception //
66 struct fp_emul_space // for emulators //
71 int f_fpregs[62]; // union of the above //
73 long f_wregs[33]; // saved weitek state //
76 These routines provide the packing and unpacking of gregset_t and
77 fpregset_t formatted data.
83 /* This is a duplicate of the table in i386-xdep.c. */
93 /* Prototypes for local functions */
95 void fill_gregset (gregset_t
*, int);
97 void supply_gregset (gregset_t
*);
99 void supply_fpregset (fpregset_t
*);
101 void fill_fpregset (fpregset_t
*, int);
104 /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
105 being less than or equal to the number of registers that can be stored
106 in a gregset_t. Note that with the current scheme there will typically
107 be more registers actually stored in a gregset_t that what we know
108 about. This is bogus and should be fixed. */
110 /* Given a pointer to a general register set in /proc format (gregset_t *),
111 unpack the register contents and supply them as gdb's idea of the current
115 supply_gregset (gregset_t
*gregsetp
)
118 register greg_t
*regp
= (greg_t
*) gregsetp
;
121 for (regi
= 0; regi
< (NUM_REGS
- NUM_FREGS
); regi
++)
123 supply_register (regi
, (char *) (regp
+ regmap
[regi
]));
128 fill_gregset (gregset_t
*gregsetp
, int 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 (fpregset_t
*fpregsetp
)
182 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
186 char *from
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
188 if (regi
== FCS_REGNUM
)
190 tval
= extract_unsigned_integer (from
, 4) & 0xffff;
191 store_unsigned_integer (tbuf
, 4, tval
);
192 supply_register (regi
, tbuf
);
194 else if (regi
== FOP_REGNUM
)
196 tval
= (extract_unsigned_integer (from
, 4) >> 16) & ((1 << 11) - 1);
197 store_unsigned_integer (tbuf
, 4, tval
);
198 supply_register (regi
, tbuf
);
201 supply_register (regi
, from
);
205 /* Given a pointer to a floating point register set in /proc format
206 (fpregset_t *), update the register specified by REGNO from gdb's idea
207 of the current floating point register set. If REGNO is -1, update
211 fill_fpregset (fpregset_t
*fpregsetp
, int regno
)
217 for (regi
= FP0_REGNUM
; regi
<= LAST_FPU_CTRL_REGNUM
; regi
++)
219 if ((regno
== -1) || (regno
== regi
))
221 char *to
= (char *) fpregsetp
+ freg_offset_map
[regi
- FP0_REGNUM
];
222 char *from
= (char *) ®isters
[REGISTER_BYTE (regi
)];
226 if (regi
== FCS_REGNUM
)
228 valto
= extract_unsigned_integer (to
, 4);
229 valfrom
= extract_unsigned_integer (from
, 4);
230 valto
= (valto
& ~0xffff) | (valfrom
& 0xffff);
231 store_unsigned_integer (to
, 4, valto
);
233 else if (regi
== FOP_REGNUM
)
235 valto
= extract_unsigned_integer (to
, 4);
236 valfrom
= extract_unsigned_integer (from
, 4);
237 valto
= (valto
& 0xffff) | ((valfrom
& ((1 << 11) - 1)) << 16);
238 store_unsigned_integer (to
, 4, valto
);
242 memcpy (to
, from
, REGISTER_RAW_SIZE (regi
));
248 #endif /* defined (HAVE_FPREGSET_T) */
250 #endif /* HAVE_SYS_PROCFS_H */
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