1 /* Native-dependent code for HP PA-RISC BSD's.
2
3 Copyright 2004, 2005 Free Software Foundation, 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 #include "target.h"
26
27 #include <sys/types.h>
28 #include <sys/ptrace.h>
29 #include <machine/reg.h>
30
31 #include "obsd-nat.h"
32 #include "hppa-tdep.h"
33 #include "inf-ptrace.h"
34
35 static int
hppabsd_gregset_supplies_p(int regnum)36 hppabsd_gregset_supplies_p (int regnum)
37 {
38 return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_CR27_REGNUM);
39 }
40
41 static int
hppabsd_fpregset_supplies_p(int regnum)42 hppabsd_fpregset_supplies_p (int regnum)
43 {
44 return (regnum >= HPPA_FP0_REGNUM && regnum < HPPA_FP0_REGNUM + 32 * 2);
45 }
46
47 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */
48
49 static void
hppabsd_supply_gregset(struct regcache * regcache,const void * gregs)50 hppabsd_supply_gregset (struct regcache *regcache, const void *gregs)
51 {
52 const char *regs = gregs;
53 int regnum;
54
55 for (regnum = HPPA_R1_REGNUM; regnum <= HPPA_R31_REGNUM; regnum++)
56 regcache_raw_supply (regcache, regnum, regs + regnum * 4);
57
58 regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
59 regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
60 regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
61 regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
62 regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
63 regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
64 regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
65 regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
66 regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
67 regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
68 regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
69 regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
70 regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
71 regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
72 regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
73 regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
74 }
75
76 /* Supply the floating-point registers stored in FPREGS to REGCACHE. */
77
78 static void
hppabsd_supply_fpregset(struct regcache * regcache,const void * fpregs)79 hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
80 {
81 const char *regs = fpregs;
82 int regnum;
83
84 for (regnum = HPPA_FP0_REGNUM; regnum < HPPA_FP0_REGNUM + 32 * 2; regnum++)
85 regcache_raw_supply (regcache, regnum,
86 regs + (regnum - HPPA_FP0_REGNUM) * 4);
87 }
88
89 /* Collect the general-purpose registers from REGCACHE and store them
90 in GREGS. */
91
92 static void
hppabsd_collect_gregset(const struct regcache * regcache,void * gregs,int regnum)93 hppabsd_collect_gregset (const struct regcache *regcache,
94 void *gregs, int regnum)
95 {
96 char *regs = gregs;
97 int i;
98
99 for (i = HPPA_R1_REGNUM; i <= HPPA_R31_REGNUM; i++)
100 {
101 if (regnum == -1 || regnum == i)
102 regcache_raw_collect (regcache, i, regs + i * 4);
103 }
104
105 if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
106 regcache_raw_collect (regcache, HPPA_IPSW_REGNUM, regs);
107 if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
108 regcache_raw_collect (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
109 if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
110 regcache_raw_collect (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
111 if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
112 regcache_raw_collect (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
113 if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
114 regcache_raw_collect (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
115 if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
116 regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
117 if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
118 regcache_raw_collect (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
119 if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
120 regcache_raw_collect (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
121 if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
122 regcache_raw_collect (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
123 if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
124 regcache_raw_collect (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
125 if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
126 regcache_raw_collect (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
127 if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
128 regcache_raw_collect (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
129 if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
130 regcache_raw_collect (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
131 if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
132 regcache_raw_collect (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
133 if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
134 regcache_raw_collect (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
135 if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
136 regcache_raw_collect (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
137 }
138
139 /* Collect the floating-point registers from REGCACHE and store them
140 in FPREGS. */
141
142 static void
hppabsd_collect_fpregset(struct regcache * regcache,void * fpregs,int regnum)143 hppabsd_collect_fpregset (struct regcache *regcache,
144 void *fpregs, int regnum)
145 {
146 char *regs = fpregs;
147 int i;
148
149 for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
150 {
151 if (regnum == -1 || regnum == i)
152 regcache_raw_collect (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4);
153 }
154 }
155
156
157 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
158 for all registers (including the floating-point registers). */
159
160 static void
hppabsd_fetch_registers(int regnum)161 hppabsd_fetch_registers (int regnum)
162 {
163 struct regcache *regcache = current_regcache;
164 int pid;
165
166 /* Cater for systems like OpenBSD, that implement threads as
167 separate processes. */
168 pid = ptid_get_lwp (inferior_ptid);
169 if (pid == 0)
170 pid = ptid_get_pid (inferior_ptid);
171
172
173 if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
174 {
175 struct reg regs;
176
177 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
178 perror_with_name (_("Couldn't get registers"));
179
180 hppabsd_supply_gregset (regcache, ®s);
181 }
182
183 if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
184 {
185 struct fpreg fpregs;
186
187 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
188 perror_with_name (_("Couldn't get floating point status"));
189
190 hppabsd_supply_fpregset (current_regcache, &fpregs);
191 }
192 }
193
194 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
195 this for all registers (including the floating-point registers). */
196
197 static void
hppabsd_store_registers(int regnum)198 hppabsd_store_registers (int regnum)
199 {
200 int pid;
201
202 /* Cater for systems like OpenBSD, that implement threads as
203 separate processes. */
204 pid = ptid_get_lwp (inferior_ptid);
205 if (pid == 0)
206 pid = ptid_get_pid (inferior_ptid);
207
208 if (regnum == -1 || hppabsd_gregset_supplies_p (regnum))
209 {
210 struct reg regs;
211
212 if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
213 perror_with_name (_("Couldn't get registers"));
214
215 hppabsd_collect_gregset (current_regcache, ®s, regnum);
216
217 if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
218 perror_with_name (_("Couldn't write registers"));
219 }
220
221 if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
222 {
223 struct fpreg fpregs;
224
225 if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
226 perror_with_name (_("Couldn't get floating point status"));
227
228 hppabsd_collect_fpregset (current_regcache, &fpregs, regnum);
229
230 if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
231 perror_with_name (_("Couldn't write floating point status"));
232 }
233 }
234
235 /* Provide a prototype to silence -Wmissing-prototypes. */
236 void _initialize_hppabsd_nat (void);
237
238 void
_initialize_hppabsd_nat(void)239 _initialize_hppabsd_nat (void)
240 {
241 struct target_ops *t;
242
243 /* Add in local overrides. */
244 t = inf_ptrace_target ();
245 t->to_fetch_registers = hppabsd_fetch_registers;
246 t->to_store_registers = hppabsd_store_registers;
247 t->to_pid_to_str = obsd_pid_to_str;
248 t->to_find_new_threads = obsd_find_new_threads;
249 t->to_wait = obsd_wait;
250 add_target (t);
251 }
252