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9ce5c36a | 1 | /* Native-dependent code for SPARC systems running NetBSD. |
c139e7d9 | 2 | Copyright 2002, 2003 Free Software Foundation, Inc. |
9ce5c36a JT |
3 | Contributed by Wasabi Systems, Inc. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "regcache.h" | |
25 | ||
c139e7d9 | 26 | #include "sparc-tdep.h" |
9ce5c36a JT |
27 | #include "sparcnbsd-tdep.h" |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <sys/ptrace.h> | |
31 | #include <machine/reg.h> | |
32 | ||
33 | /* NOTE: We don't bother with any of the deferred_store nonsense; it | |
34 | makes things a lot more complicated than they need to be. */ | |
35 | ||
36 | /* Determine if PT_GETREGS fetches this register. */ | |
37 | static int | |
38 | getregs_supplies (int regno) | |
39 | { | |
40 | return (regno == PS_REGNUM | |
41 | || regno == PC_REGNUM | |
c6316faa | 42 | || regno == DEPRECATED_NPC_REGNUM |
9ce5c36a JT |
43 | || regno == Y_REGNUM |
44 | || (regno >= G0_REGNUM && regno <= G7_REGNUM) | |
45 | || (regno >= O0_REGNUM && regno <= O7_REGNUM) | |
46 | /* stack regs (handled by sparcnbsd_supply_reg) */ | |
47 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)); | |
48 | } | |
49 | ||
50 | /* Determine if PT_GETFPREGS fetches this register. */ | |
51 | static int | |
52 | getfpregs_supplies (int regno) | |
53 | { | |
54 | return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 31)) | |
55 | || regno == FPS_REGNUM); | |
56 | } | |
57 | ||
58 | void | |
59 | fetch_inferior_registers (int regno) | |
60 | { | |
61 | /* We don't use deferred stores. */ | |
62 | if (deferred_stores) | |
63 | internal_error (__FILE__, __LINE__, | |
64 | "fetch_inferior_registers: deferred stores pending"); | |
65 | ||
66 | if (regno == -1 || getregs_supplies (regno)) | |
67 | { | |
68 | struct reg regs; | |
69 | ||
70 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
71 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
72 | perror_with_name ("Couldn't get registers"); | |
73 | ||
74 | sparcnbsd_supply_reg32 ((char *) ®s, regno); | |
75 | if (regno != -1) | |
76 | return; | |
77 | } | |
78 | ||
79 | if (regno == -1 || getfpregs_supplies (regno)) | |
80 | { | |
81 | struct fpreg fpregs; | |
82 | ||
83 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
84 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
85 | perror_with_name ("Couldn't get floating point registers"); | |
86 | ||
87 | sparcnbsd_supply_fpreg32 ((char *) &fpregs, regno); | |
88 | if (regno != -1) | |
89 | return; | |
90 | } | |
91 | } | |
92 | ||
93 | void | |
94 | store_inferior_registers (int regno) | |
95 | { | |
96 | /* We don't use deferred stores. */ | |
97 | if (deferred_stores) | |
98 | internal_error (__FILE__, __LINE__, | |
99 | "store_inferior_registers: deferred stores pending"); | |
100 | ||
101 | if (regno == -1 || getregs_supplies (regno)) | |
102 | { | |
103 | struct reg regs; | |
104 | ||
105 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
106 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
107 | perror_with_name ("Couldn't get registers"); | |
108 | ||
109 | sparcnbsd_fill_reg32 ((char *) ®s, regno); | |
110 | ||
111 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), | |
112 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
113 | perror_with_name ("Couldn't write registers"); | |
114 | ||
115 | /* Deal with the stack regs. */ | |
116 | if (regno == -1 || regno == SP_REGNUM | |
117 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)) | |
118 | { | |
119 | CORE_ADDR sp = read_register (SP_REGNUM); | |
120 | int i; | |
121 | char buf[4]; | |
122 | ||
123 | for (i = L0_REGNUM; i <= I7_REGNUM; i++) | |
124 | { | |
125 | if (regno == -1 || regno == SP_REGNUM || regno == i) | |
126 | { | |
127 | regcache_collect (i, buf); | |
128 | target_write_memory (sp + ((i - L0_REGNUM) * 4), | |
129 | buf, sizeof (buf)); | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | if (regno != -1) | |
135 | return; | |
136 | } | |
137 | ||
138 | if (regno == -1 || getfpregs_supplies (regno)) | |
139 | { | |
140 | struct fpreg fpregs; | |
141 | ||
142 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
143 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
144 | perror_with_name ("Couldn't get floating point registers"); | |
145 | ||
146 | sparcnbsd_fill_fpreg32 ((char *) &fpregs, regno); | |
147 | ||
148 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), | |
149 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
150 | perror_with_name ("Couldn't write floating point registers"); | |
151 | ||
152 | if (regno != -1) | |
153 | return; | |
154 | } | |
155 | } |