Commit | Line | Data |
---|---|---|
4d0eabff | 1 | /* Native-dependent code for SVR4 Unix running on i386's, for GDB. |
e33aefba | 2 | Copyright 1988, 1989, 1991, 1992, 1996 Free Software Foundation, Inc. |
4d0eabff FF |
3 | |
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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 | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
4d0eabff | 19 | |
d58ffc6c FF |
20 | #include "defs.h" |
21 | ||
9ca743cf AG |
22 | #ifdef HAVE_SYS_REG_H |
23 | #include <sys/reg.h> | |
24 | #endif | |
25 | ||
4708ac65 FF |
26 | #ifdef HAVE_SYS_PROCFS_H |
27 | ||
4d0eabff FF |
28 | #include <sys/procfs.h> |
29 | ||
30 | /* The /proc interface divides the target machine's register set up into | |
31 | two different sets, the general register set (gregset) and the floating | |
32 | point register set (fpregset). For each set, there is an ioctl to get | |
33 | the current register set and another ioctl to set the current values. | |
34 | ||
35 | The actual structure passed through the ioctl interface is, of course, | |
36 | naturally machine dependent, and is different for each set of registers. | |
37 | For the i386 for example, the general register set is typically defined | |
38 | by: | |
39 | ||
40 | typedef int gregset_t[19]; (in <sys/regset.h>) | |
41 | ||
42 | #define GS 0 (in <sys/reg.h>) | |
43 | #define FS 1 | |
44 | ... | |
45 | #define UESP 17 | |
46 | #define SS 18 | |
47 | ||
48 | and the floating point set by: | |
49 | ||
50 | typedef struct fpregset | |
51 | { | |
52 | union | |
53 | { | |
54 | struct fpchip_state // fp extension state // | |
55 | { | |
56 | int state[27]; // 287/387 saved state // | |
57 | int status; // status word saved at exception // | |
58 | } fpchip_state; | |
59 | struct fp_emul_space // for emulators // | |
60 | { | |
61 | char fp_emul[246]; | |
62 | char fp_epad[2]; | |
63 | } fp_emul_space; | |
64 | int f_fpregs[62]; // union of the above // | |
65 | } fp_reg_set; | |
66 | long f_wregs[33]; // saved weitek state // | |
67 | } fpregset_t; | |
68 | ||
69 | These routines provide the packing and unpacking of gregset_t and | |
70 | fpregset_t formatted data. | |
71 | ||
72 | */ | |
73 | ||
4708ac65 FF |
74 | #ifdef HAVE_GREGSET_T |
75 | ||
4d0eabff FF |
76 | /* This is a duplicate of the table in i386-xdep.c. */ |
77 | ||
78 | static int regmap[] = | |
79 | { | |
80 | EAX, ECX, EDX, EBX, | |
81 | UESP, EBP, ESI, EDI, | |
82 | EIP, EFL, CS, SS, | |
83 | DS, ES, FS, GS, | |
84 | }; | |
85 | ||
86 | ||
e33aefba FF |
87 | /* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS) |
88 | being less than or equal to the number of registers that can be stored | |
89 | in a gregset_t. Note that with the current scheme there will typically | |
90 | be more registers actually stored in a gregset_t that what we know | |
91 | about. This is bogus and should be fixed. */ | |
92 | ||
4d0eabff FF |
93 | /* Given a pointer to a general register set in /proc format (gregset_t *), |
94 | unpack the register contents and supply them as gdb's idea of the current | |
95 | register values. */ | |
96 | ||
97 | void | |
98 | supply_gregset (gregsetp) | |
99 | gregset_t *gregsetp; | |
100 | { | |
101 | register int regi; | |
102 | register greg_t *regp = (greg_t *) gregsetp; | |
103 | extern int regmap[]; | |
104 | ||
e33aefba | 105 | for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++) |
4d0eabff FF |
106 | { |
107 | supply_register (regi, (char *) (regp + regmap[regi])); | |
108 | } | |
109 | } | |
110 | ||
111 | void | |
112 | fill_gregset (gregsetp, regno) | |
113 | gregset_t *gregsetp; | |
114 | int regno; | |
115 | { | |
116 | int regi; | |
117 | register greg_t *regp = (greg_t *) gregsetp; | |
118 | extern char registers[]; | |
119 | extern int regmap[]; | |
120 | ||
e33aefba | 121 | for (regi = 0 ; regi < (NUM_REGS - NUM_FREGS) ; regi++) |
4d0eabff FF |
122 | { |
123 | if ((regno == -1) || (regno == regi)) | |
124 | { | |
125 | *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)]; | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
4708ac65 FF |
130 | #endif /* HAVE_GREGSET_T */ |
131 | ||
132 | #if defined (FP0_REGNUM) && defined (HAVE_FPREGSET_T) | |
4d0eabff FF |
133 | |
134 | /* Given a pointer to a floating point register set in /proc format | |
135 | (fpregset_t *), unpack the register contents and supply them as gdb's | |
136 | idea of the current floating point register values. */ | |
137 | ||
138 | void | |
139 | supply_fpregset (fpregsetp) | |
140 | fpregset_t *fpregsetp; | |
141 | { | |
4d0eabff FF |
142 | /* FIXME: see m68k-tdep.c for an example, for the m68k. */ |
143 | } | |
144 | ||
145 | /* Given a pointer to a floating point register set in /proc format | |
146 | (fpregset_t *), update the register specified by REGNO from gdb's idea | |
147 | of the current floating point register set. If REGNO is -1, update | |
148 | them all. */ | |
149 | ||
150 | void | |
151 | fill_fpregset (fpregsetp, regno) | |
152 | fpregset_t *fpregsetp; | |
153 | int regno; | |
154 | { | |
4d0eabff FF |
155 | /* FIXME: see m68k-tdep.c for an example, for the m68k. */ |
156 | } | |
157 | ||
4708ac65 FF |
158 | #endif /* defined (FP0_REGNUM) && defined (HAVE_FPREGSET_T) */ |
159 | ||
160 | #endif /* HAVE_SYS_PROCFS_H */ |