1 /* Native-dependent code for SVR4 Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 #include <sys/procfs.h>
23 /* The /proc interface divides the target machine's register set up into
24 two different sets, the general register set (gregset) and the floating
25 point register set (fpregset). For each set, there is an ioctl to get
26 the current register set and another ioctl to set the current values.
28 The actual structure passed through the ioctl interface is, of course,
29 naturally machine dependent, and is different for each set of registers.
30 For the i386 for example, the general register set is typically defined
33 typedef int gregset_t[19]; (in <sys/regset.h>)
35 #define GS 0 (in <sys/reg.h>)
41 and the floating point set by:
43 typedef struct fpregset
47 struct fpchip_state // fp extension state //
49 int state[27]; // 287/387 saved state //
50 int status; // status word saved at exception //
52 struct fp_emul_space // for emulators //
57 int f_fpregs[62]; // union of the above //
59 long f_wregs[33]; // saved weitek state //
62 These routines provide the packing and unpacking of gregset_t and
63 fpregset_t formatted data.
67 /* This is a duplicate of the table in i386-xdep.c. */
78 /* Given a pointer to a general register set in /proc format (gregset_t *),
79 unpack the register contents and supply them as gdb's idea of the current
83 supply_gregset (gregsetp
)
87 register greg_t
*regp
= (greg_t
*) gregsetp
;
90 for (regi
= 0 ; regi
< NUM_REGS
; regi
++)
92 supply_register (regi
, (char *) (regp
+ regmap
[regi
]));
97 fill_gregset (gregsetp
, regno
)
102 register greg_t
*regp
= (greg_t
*) gregsetp
;
103 extern char registers
[];
106 for (regi
= 0 ; regi
< NUM_REGS
; regi
++)
108 if ((regno
== -1) || (regno
== regi
))
110 *(regp
+ regmap
[regi
]) = *(int *) ®isters
[REGISTER_BYTE (regi
)];
115 #if defined (FP0_REGNUM)
117 /* Given a pointer to a floating point register set in /proc format
118 (fpregset_t *), unpack the register contents and supply them as gdb's
119 idea of the current floating point register values. */
122 supply_fpregset (fpregsetp
)
123 fpregset_t
*fpregsetp
;
127 /* FIXME: see m68k-tdep.c for an example, for the m68k. */
130 /* Given a pointer to a floating point register set in /proc format
131 (fpregset_t *), update the register specified by REGNO from gdb's idea
132 of the current floating point register set. If REGNO is -1, update
136 fill_fpregset (fpregsetp
, regno
)
137 fpregset_t
*fpregsetp
;
143 extern char registers
[];
145 /* FIXME: see m68k-tdep.c for an example, for the m68k. */
148 #endif /* defined (FP0_REGNUM) */
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