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eeb8076c MK |
1 | /* Native-dependent code for PA-RISC HP-UX. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2004-2014 Free Software Foundation, Inc. |
eeb8076c MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
eeb8076c MK |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
eeb8076c MK |
19 | |
20 | #include "defs.h" | |
21 | #include "inferior.h" | |
22 | #include "regcache.h" | |
23 | #include "target.h" | |
24 | ||
eeb8076c | 25 | #include <sys/ptrace.h> |
7b64a93b | 26 | #include <sys/utsname.h> |
eeb8076c MK |
27 | #include <machine/save_state.h> |
28 | ||
eee22bf8 MK |
29 | #ifdef HAVE_TTRACE |
30 | #include <sys/ttrace.h> | |
31 | #endif | |
32 | ||
eeb8076c | 33 | #include "hppa-tdep.h" |
7b64a93b | 34 | #include "solib-som.h" |
eeb8076c | 35 | #include "inf-ptrace.h" |
eee22bf8 MK |
36 | #include "inf-ttrace.h" |
37 | ||
eeca586f MK |
38 | /* Return the offset of register REGNUM within `struct save_state'. |
39 | The offset returns depends on the flags in the "flags" register and | |
40 | the register size (32-bit or 64-bit). These are taken from | |
41 | REGCACHE. */ | |
3f6306ec | 42 | |
58665b40 | 43 | static LONGEST |
eeca586f | 44 | hppa_hpux_save_state_offset (struct regcache *regcache, int regnum) |
eeb8076c | 45 | { |
eeca586f | 46 | LONGEST offset; |
eeb8076c | 47 | |
eeca586f MK |
48 | if (regnum == HPPA_FLAGS_REGNUM) |
49 | return ssoff (ss_flags); | |
eeb8076c | 50 | |
eeca586f MK |
51 | if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM) |
52 | { | |
53 | struct gdbarch *arch = get_regcache_arch (regcache); | |
54 | size_t size = register_size (arch, HPPA_R1_REGNUM); | |
55 | ULONGEST flags; | |
56 | ||
57 | gdb_assert (size == 4 || size == 8); | |
58 | ||
59 | regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags); | |
60 | if (flags & SS_WIDEREGS) | |
61 | offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8; | |
62 | else | |
63 | offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4; | |
64 | } | |
65 | else | |
66 | { | |
67 | struct gdbarch *arch = get_regcache_arch (regcache); | |
68 | size_t size = register_size (arch, HPPA_FP0_REGNUM); | |
69 | ||
70 | gdb_assert (size == 4 || size == 8); | |
71 | gdb_assert (regnum >= HPPA_FP0_REGNUM); | |
72 | offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size; | |
73 | } | |
74 | ||
75 | gdb_assert (offset < sizeof (save_state_t)); | |
76 | return offset; | |
eeb8076c MK |
77 | } |
78 | ||
eee22bf8 MK |
79 | /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2) |
80 | at all. */ | |
81 | #ifndef PTRACE_TYPE_RET | |
82 | #define PTRACE_TYPE_RET void | |
83 | #endif | |
84 | ||
eeb8076c | 85 | static void |
56be3814 | 86 | hppa_hpux_fetch_register (struct regcache *regcache, int regnum) |
eeb8076c | 87 | { |
464963c9 | 88 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 89 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
eeb8076c MK |
90 | CORE_ADDR addr; |
91 | size_t size; | |
92 | PTRACE_TYPE_RET *buf; | |
93 | pid_t pid; | |
94 | int i; | |
95 | ||
eee22bf8 | 96 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 97 | |
eeca586f | 98 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 99 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
464963c9 | 100 | size = register_size (gdbarch, regnum); |
eeb8076c | 101 | |
eee22bf8 | 102 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
103 | buf = alloca (size); |
104 | ||
eee22bf8 MK |
105 | #ifdef HAVE_TTRACE |
106 | { | |
107 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
108 | ||
109 | if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 110 | error (_("Couldn't read register %s (#%d): %s"), |
464963c9 | 111 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 112 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
113 | } |
114 | #else | |
115 | { | |
116 | int i; | |
117 | ||
118 | /* Read the register contents from the inferior a chuck at the time. */ | |
119 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
120 | { | |
121 | errno = 0; | |
122 | buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0); | |
123 | if (errno != 0) | |
8a3fe4f8 | 124 | error (_("Couldn't read register %s (#%d): %s"), |
464963c9 | 125 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 126 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
127 | |
128 | addr += sizeof (PTRACE_TYPE_RET); | |
129 | } | |
130 | } | |
131 | #endif | |
eeb8076c | 132 | |
eeca586f MK |
133 | /* Take care with the "flags" register. It's stored as an `int' in |
134 | `struct save_state', even for 64-bit code. */ | |
135 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
136 | { | |
e17a4113 UW |
137 | ULONGEST flags; |
138 | flags = extract_unsigned_integer ((gdb_byte *)buf, 4, byte_order); | |
139 | store_unsigned_integer ((gdb_byte *)buf, 8, byte_order, flags); | |
eeca586f MK |
140 | } |
141 | ||
56be3814 | 142 | regcache_raw_supply (regcache, regnum, buf); |
eeb8076c MK |
143 | } |
144 | ||
145 | static void | |
28439f5e PA |
146 | hppa_hpux_fetch_inferior_registers (struct target_ops *ops, |
147 | struct regcache *regcache, int regnum) | |
eeb8076c MK |
148 | { |
149 | if (regnum == -1) | |
464963c9 UW |
150 | for (regnum = 0; |
151 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); | |
152 | regnum++) | |
56be3814 | 153 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c | 154 | else |
56be3814 | 155 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c MK |
156 | } |
157 | ||
158 | /* Store register REGNUM into the inferior. */ | |
159 | ||
160 | static void | |
56be3814 | 161 | hppa_hpux_store_register (struct regcache *regcache, int regnum) |
eeb8076c | 162 | { |
464963c9 | 163 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 164 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
261224b2 | 165 | CORE_ADDR addr; |
eeb8076c MK |
166 | size_t size; |
167 | PTRACE_TYPE_RET *buf; | |
168 | pid_t pid; | |
eeb8076c | 169 | |
eee22bf8 | 170 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 171 | |
eeca586f | 172 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 173 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
464963c9 | 174 | size = register_size (gdbarch, regnum); |
eeb8076c | 175 | |
eee22bf8 | 176 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
177 | buf = alloca (size); |
178 | ||
56be3814 | 179 | regcache_raw_collect (regcache, regnum, buf); |
eeb8076c | 180 | |
eeca586f MK |
181 | /* Take care with the "flags" register. It's stored as an `int' in |
182 | `struct save_state', even for 64-bit code. */ | |
183 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
184 | { | |
e17a4113 UW |
185 | ULONGEST flags; |
186 | flags = extract_unsigned_integer ((gdb_byte *)buf, 8, byte_order); | |
187 | store_unsigned_integer ((gdb_byte *)buf, 4, byte_order, flags); | |
eeca586f MK |
188 | size = 4; |
189 | } | |
190 | ||
eee22bf8 MK |
191 | #ifdef HAVE_TTRACE |
192 | { | |
193 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
194 | ||
195 | if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 196 | error (_("Couldn't write register %s (#%d): %s"), |
464963c9 | 197 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 198 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
199 | } |
200 | #else | |
201 | { | |
202 | int i; | |
203 | ||
204 | /* Write the register contents into the inferior a chunk at the time. */ | |
205 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
206 | { | |
207 | errno = 0; | |
208 | ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0); | |
209 | if (errno != 0) | |
8a3fe4f8 | 210 | error (_("Couldn't write register %s (#%d): %s"), |
464963c9 | 211 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 212 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
213 | |
214 | addr += sizeof (PTRACE_TYPE_RET); | |
215 | } | |
216 | } | |
217 | #endif | |
eeb8076c MK |
218 | } |
219 | ||
220 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
221 | this for all registers (including the floating point registers). */ | |
222 | ||
223 | static void | |
28439f5e PA |
224 | hppa_hpux_store_inferior_registers (struct target_ops *ops, |
225 | struct regcache *regcache, int regnum) | |
eeb8076c MK |
226 | { |
227 | if (regnum == -1) | |
464963c9 UW |
228 | for (regnum = 0; |
229 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); | |
230 | regnum++) | |
56be3814 | 231 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 232 | else |
56be3814 | 233 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 234 | } |
3f6306ec | 235 | |
7b64a93b PM |
236 | /* Set hpux_major_release variable to the value retrieved from a call to |
237 | uname function. */ | |
238 | ||
239 | static void | |
240 | set_hpux_major_release (void) | |
241 | { | |
242 | struct utsname x; | |
243 | char *p; | |
244 | ||
245 | uname (&x); | |
246 | p = strchr (x.release, '.'); | |
247 | if (p) | |
248 | hpux_major_release = atoi (p + 1); | |
249 | } | |
250 | ||
eeb8076c MK |
251 | \f |
252 | ||
253 | /* Prevent warning from -Wmissing-prototypes. */ | |
254 | void _initialize_hppa_hpux_nat (void); | |
255 | ||
256 | void | |
257 | _initialize_hppa_hpux_nat (void) | |
258 | { | |
259 | struct target_ops *t; | |
260 | ||
7b64a93b PM |
261 | set_hpux_major_release (); |
262 | ||
eee22bf8 MK |
263 | #ifdef HAVE_TTRACE |
264 | t = inf_ttrace_target (); | |
265 | #else | |
eeb8076c | 266 | t = inf_ptrace_target (); |
eee22bf8 MK |
267 | #endif |
268 | ||
eeb8076c MK |
269 | t->to_fetch_registers = hppa_hpux_fetch_inferior_registers; |
270 | t->to_store_registers = hppa_hpux_store_inferior_registers; | |
eee22bf8 | 271 | |
eeb8076c MK |
272 | add_target (t); |
273 | } |