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9ce5c36a | 1 | /* Native-dependent code for UltraSPARC 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 | /* FIXME: PS_REGNUM for 32-bit code. */ | |
41 | return (regno == TSTATE_REGNUM | |
42 | || regno == PC_REGNUM | |
c6316faa | 43 | || regno == DEPRECATED_NPC_REGNUM |
9ce5c36a JT |
44 | || regno == Y_REGNUM |
45 | || (regno >= G0_REGNUM && regno <= G7_REGNUM) | |
46 | || (regno >= O0_REGNUM && regno <= O7_REGNUM) | |
47 | /* stack regs (handled by sparcnbsd_supply_reg) */ | |
48 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)); | |
49 | } | |
50 | ||
51 | /* Determine if PT_GETFPREGS fetches this register. */ | |
52 | static int | |
53 | getfpregs_supplies (int regno) | |
54 | { | |
55 | return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 47)) | |
56 | || regno == FPS_REGNUM); | |
57 | } | |
58 | ||
59 | void | |
60 | fetch_inferior_registers (int regno) | |
61 | { | |
62 | /* We don't use deferred stores. */ | |
63 | if (deferred_stores) | |
64 | internal_error (__FILE__, __LINE__, | |
65 | "fetch_inferior_registers: deferred stores pending"); | |
66 | ||
67 | if (regno == -1 || getregs_supplies (regno)) | |
68 | { | |
69 | union { | |
70 | struct reg32 regs32; | |
71 | struct reg64 regs64; | |
72 | } regs; | |
73 | ||
74 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
75 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
76 | perror_with_name ("Couldn't get registers"); | |
77 | ||
78 | if (gdbarch_ptr_bit (current_gdbarch) == 32) | |
79 | sparcnbsd_supply_reg32 ((char *) ®s.regs32, regno); | |
80 | else | |
81 | sparcnbsd_supply_reg64 ((char *) ®s.regs64, regno); | |
82 | if (regno != -1) | |
83 | return; | |
84 | } | |
85 | ||
86 | if (regno == -1 || getfpregs_supplies (regno)) | |
87 | { | |
88 | union { | |
89 | struct fpreg32 fpregs32; | |
90 | struct fpreg64 fpregs64; | |
91 | } fpregs; | |
92 | ||
93 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
94 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
95 | perror_with_name ("Couldn't get floating point registers"); | |
96 | ||
97 | if (gdbarch_ptr_bit (current_gdbarch) == 32) | |
98 | sparcnbsd_supply_fpreg32 ((char *) &fpregs.fpregs32, regno); | |
99 | else | |
100 | sparcnbsd_supply_fpreg64 ((char *) &fpregs.fpregs64, regno); | |
101 | if (regno != -1) | |
102 | return; | |
103 | } | |
104 | } | |
105 | ||
106 | void | |
107 | store_inferior_registers (int regno) | |
108 | { | |
109 | /* We don't use deferred stores. */ | |
110 | if (deferred_stores) | |
111 | internal_error (__FILE__, __LINE__, | |
112 | "store_inferior_registers: deferred stores pending"); | |
113 | ||
114 | if (regno == -1 || getregs_supplies (regno)) | |
115 | { | |
116 | union { | |
117 | struct reg32 regs32; | |
118 | struct reg64 regs64; | |
119 | } regs; | |
120 | ||
121 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), | |
122 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
123 | perror_with_name ("Couldn't get registers"); | |
124 | ||
125 | if (gdbarch_ptr_bit (current_gdbarch) == 32) | |
126 | sparcnbsd_fill_reg32 ((char *) ®s.regs32, regno); | |
127 | else | |
128 | sparcnbsd_fill_reg64 ((char *) ®s.regs64, regno); | |
129 | ||
130 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), | |
131 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) | |
132 | perror_with_name ("Couldn't write registers"); | |
133 | ||
134 | /* Deal with the stack regs. */ | |
135 | if (regno == -1 || regno == SP_REGNUM | |
136 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)) | |
137 | { | |
138 | CORE_ADDR sp = read_register (SP_REGNUM); | |
139 | int i; | |
140 | char buf[8]; | |
141 | ||
142 | if (sp & 1) | |
143 | { | |
144 | /* Registers are 64-bit. */ | |
145 | sp += 2047; | |
146 | ||
147 | for (i = L0_REGNUM; i <= I7_REGNUM; i++) | |
148 | { | |
149 | if (regno == -1 || regno == SP_REGNUM || regno == i) | |
150 | { | |
151 | regcache_collect (i, buf); | |
152 | target_write_memory (sp + ((i - L0_REGNUM) * 8), | |
153 | buf, sizeof (buf)); | |
154 | } | |
155 | } | |
156 | } | |
157 | else | |
158 | { | |
159 | /* Registers are 32-bit. Toss any sign-extension of the stack | |
160 | pointer. | |
161 | ||
162 | FIXME: We don't currently handle 32-bit code in a binary | |
163 | that indicated LP64. Do we have to care about that? */ | |
164 | if (gdbarch_ptr_bit (current_gdbarch) != 32) | |
165 | internal_error | |
166 | (__FILE__, __LINE__, | |
167 | "store_inferior_registers: 32-bit code in 64-bit inferior"); | |
168 | ||
169 | sp &= 0xffffffffUL; | |
170 | for (i = L0_REGNUM; i <= I7_REGNUM; i++) | |
171 | { | |
172 | if (regno == -1 || regno == SP_REGNUM || regno == i) | |
173 | { | |
174 | regcache_collect (i, buf); | |
175 | target_write_memory (sp + ((i - L0_REGNUM) * 4), buf, 4); | |
176 | } | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
181 | if (regno != -1) | |
182 | return; | |
183 | } | |
184 | ||
185 | if (regno == -1 || getfpregs_supplies (regno)) | |
186 | { | |
187 | union { | |
188 | struct fpreg32 fpregs32; | |
189 | struct fpreg64 fpregs64; | |
190 | } fpregs; | |
191 | ||
192 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), | |
193 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
194 | perror_with_name ("Couldn't get floating point registers"); | |
195 | ||
196 | if (gdbarch_ptr_bit (current_gdbarch) == 32) | |
197 | sparcnbsd_fill_fpreg32 ((char *) &fpregs.fpregs32, regno); | |
198 | else | |
199 | sparcnbsd_fill_fpreg64 ((char *) &fpregs.fpregs64, regno); | |
200 | ||
201 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), | |
202 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) | |
203 | perror_with_name ("Couldn't write floating point registers"); | |
204 | ||
205 | if (regno != -1) | |
206 | return; | |
207 | } | |
208 | } |