1 /* Native-dependent code for SVR4 Unix running on i386's, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1996 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, Boston, MA 02111-1307, 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 /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
79 being less than or equal to the number of registers that can be stored
80 in a gregset_t. Note that with the current scheme there will typically
81 be more registers actually stored in a gregset_t that what we know
82 about. This is bogus and should be fixed. */
84 /* Given a pointer to a general register set in /proc format (gregset_t *),
85 unpack the register contents and supply them as gdb's idea of the current
89 supply_gregset (gregsetp)
93 register greg_t *regp = (greg_t *) gregsetp;
96 for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++)
98 supply_register (regi, (char *) (regp + regmap[regi]));
103 fill_gregset (gregsetp, regno)
108 register greg_t *regp = (greg_t *) gregsetp;
109 extern char registers[];
112 for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++)
114 if ((regno == -1) || (regno == regi))
116 *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)];
121 #if defined (FP0_REGNUM)
123 /* Given a pointer to a floating point register set in /proc format
124 (fpregset_t *), unpack the register contents and supply them as gdb's
125 idea of the current floating point register values. */
128 supply_fpregset (fpregsetp)
129 fpregset_t *fpregsetp;
133 /* FIXME: see m68k-tdep.c for an example, for the m68k. */
136 /* Given a pointer to a floating point register set in /proc format
137 (fpregset_t *), update the register specified by REGNO from gdb's idea
138 of the current floating point register set. If REGNO is -1, update
142 fill_fpregset (fpregsetp, regno)
143 fpregset_t *fpregsetp;
149 extern char registers[];
151 /* FIXME: see m68k-tdep.c for an example, for the m68k. */
154 #endif /* defined (FP0_REGNUM) */