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eeb8076c MK |
1 | /* Native-dependent code for PA-RISC HP-UX. |
2 | ||
9b254dd1 | 3 | Copyright (C) 2004, 2005, 2007, 2008 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 | ||
25 | #include "gdb_assert.h" | |
26 | #include <sys/ptrace.h> | |
27 | #include <machine/save_state.h> | |
28 | ||
eee22bf8 MK |
29 | #ifdef HAVE_TTRACE |
30 | #include <sys/ttrace.h> | |
31 | #endif | |
32 | ||
eeb8076c MK |
33 | #include "hppa-tdep.h" |
34 | #include "inf-ptrace.h" | |
eee22bf8 MK |
35 | #include "inf-ttrace.h" |
36 | ||
eeca586f MK |
37 | /* Non-zero if we should pretend not to be a runnable target. */ |
38 | int child_suppress_run = 0; | |
eeb8076c | 39 | |
eeca586f MK |
40 | /* Return the offset of register REGNUM within `struct save_state'. |
41 | The offset returns depends on the flags in the "flags" register and | |
42 | the register size (32-bit or 64-bit). These are taken from | |
43 | REGCACHE. */ | |
3f6306ec | 44 | |
eeca586f MK |
45 | LONGEST |
46 | hppa_hpux_save_state_offset (struct regcache *regcache, int regnum) | |
eeb8076c | 47 | { |
eeca586f | 48 | LONGEST offset; |
eeb8076c | 49 | |
eeca586f MK |
50 | if (regnum == HPPA_FLAGS_REGNUM) |
51 | return ssoff (ss_flags); | |
eeb8076c | 52 | |
eeca586f MK |
53 | if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM) |
54 | { | |
55 | struct gdbarch *arch = get_regcache_arch (regcache); | |
56 | size_t size = register_size (arch, HPPA_R1_REGNUM); | |
57 | ULONGEST flags; | |
58 | ||
59 | gdb_assert (size == 4 || size == 8); | |
60 | ||
61 | regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags); | |
62 | if (flags & SS_WIDEREGS) | |
63 | offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8; | |
64 | else | |
65 | offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4; | |
66 | } | |
67 | else | |
68 | { | |
69 | struct gdbarch *arch = get_regcache_arch (regcache); | |
70 | size_t size = register_size (arch, HPPA_FP0_REGNUM); | |
71 | ||
72 | gdb_assert (size == 4 || size == 8); | |
73 | gdb_assert (regnum >= HPPA_FP0_REGNUM); | |
74 | offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size; | |
75 | } | |
76 | ||
77 | gdb_assert (offset < sizeof (save_state_t)); | |
78 | return offset; | |
eeb8076c MK |
79 | } |
80 | ||
eee22bf8 MK |
81 | /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2) |
82 | at all. */ | |
83 | #ifndef PTRACE_TYPE_RET | |
84 | #define PTRACE_TYPE_RET void | |
85 | #endif | |
86 | ||
eeb8076c | 87 | static void |
56be3814 | 88 | hppa_hpux_fetch_register (struct regcache *regcache, int regnum) |
eeb8076c | 89 | { |
464963c9 | 90 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
eeb8076c MK |
91 | CORE_ADDR addr; |
92 | size_t size; | |
93 | PTRACE_TYPE_RET *buf; | |
94 | pid_t pid; | |
95 | int i; | |
96 | ||
eee22bf8 | 97 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 98 | |
eeca586f | 99 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 100 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
464963c9 | 101 | size = register_size (gdbarch, regnum); |
eeb8076c | 102 | |
eee22bf8 | 103 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
104 | buf = alloca (size); |
105 | ||
eee22bf8 MK |
106 | #ifdef HAVE_TTRACE |
107 | { | |
108 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
109 | ||
110 | if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 111 | error (_("Couldn't read register %s (#%d): %s"), |
464963c9 | 112 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 113 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
114 | } |
115 | #else | |
116 | { | |
117 | int i; | |
118 | ||
119 | /* Read the register contents from the inferior a chuck at the time. */ | |
120 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
121 | { | |
122 | errno = 0; | |
123 | buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0); | |
124 | if (errno != 0) | |
8a3fe4f8 | 125 | error (_("Couldn't read register %s (#%d): %s"), |
464963c9 | 126 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 127 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
128 | |
129 | addr += sizeof (PTRACE_TYPE_RET); | |
130 | } | |
131 | } | |
132 | #endif | |
eeb8076c | 133 | |
eeca586f MK |
134 | /* Take care with the "flags" register. It's stored as an `int' in |
135 | `struct save_state', even for 64-bit code. */ | |
136 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
137 | { | |
0d559b99 MK |
138 | ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 4); |
139 | store_unsigned_integer ((gdb_byte *)buf, 8, flags); | |
eeca586f MK |
140 | } |
141 | ||
56be3814 | 142 | regcache_raw_supply (regcache, regnum, buf); |
eeb8076c MK |
143 | } |
144 | ||
145 | static void | |
56be3814 | 146 | hppa_hpux_fetch_inferior_registers (struct regcache *regcache, int regnum) |
eeb8076c MK |
147 | { |
148 | if (regnum == -1) | |
464963c9 UW |
149 | for (regnum = 0; |
150 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); | |
151 | regnum++) | |
56be3814 | 152 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c | 153 | else |
56be3814 | 154 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c MK |
155 | } |
156 | ||
157 | /* Store register REGNUM into the inferior. */ | |
158 | ||
159 | static void | |
56be3814 | 160 | hppa_hpux_store_register (struct regcache *regcache, int regnum) |
eeb8076c | 161 | { |
464963c9 | 162 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
261224b2 | 163 | CORE_ADDR addr; |
eeb8076c MK |
164 | size_t size; |
165 | PTRACE_TYPE_RET *buf; | |
166 | pid_t pid; | |
eeb8076c | 167 | |
eee22bf8 | 168 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 169 | |
eeca586f | 170 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 171 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
464963c9 | 172 | size = register_size (gdbarch, regnum); |
eeb8076c | 173 | |
eee22bf8 | 174 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
175 | buf = alloca (size); |
176 | ||
56be3814 | 177 | regcache_raw_collect (regcache, regnum, buf); |
eeb8076c | 178 | |
eeca586f MK |
179 | /* Take care with the "flags" register. It's stored as an `int' in |
180 | `struct save_state', even for 64-bit code. */ | |
181 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
182 | { | |
0d559b99 MK |
183 | ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 8); |
184 | store_unsigned_integer ((gdb_byte *)buf, 4, flags); | |
eeca586f MK |
185 | size = 4; |
186 | } | |
187 | ||
eee22bf8 MK |
188 | #ifdef HAVE_TTRACE |
189 | { | |
190 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
191 | ||
192 | if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 193 | error (_("Couldn't write register %s (#%d): %s"), |
464963c9 | 194 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 195 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
196 | } |
197 | #else | |
198 | { | |
199 | int i; | |
200 | ||
201 | /* Write the register contents into the inferior a chunk at the time. */ | |
202 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
203 | { | |
204 | errno = 0; | |
205 | ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0); | |
206 | if (errno != 0) | |
8a3fe4f8 | 207 | error (_("Couldn't write register %s (#%d): %s"), |
464963c9 | 208 | gdbarch_register_name (gdbarch, regnum), |
c9f4d572 | 209 | regnum, safe_strerror (errno)); |
eee22bf8 MK |
210 | |
211 | addr += sizeof (PTRACE_TYPE_RET); | |
212 | } | |
213 | } | |
214 | #endif | |
eeb8076c MK |
215 | } |
216 | ||
217 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
218 | this for all registers (including the floating point registers). */ | |
219 | ||
220 | static void | |
56be3814 | 221 | hppa_hpux_store_inferior_registers (struct regcache *regcache, int regnum) |
eeb8076c MK |
222 | { |
223 | if (regnum == -1) | |
464963c9 UW |
224 | for (regnum = 0; |
225 | regnum < gdbarch_num_regs (get_regcache_arch (regcache)); | |
226 | regnum++) | |
56be3814 | 227 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 228 | else |
56be3814 | 229 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 230 | } |
3f6306ec DA |
231 | |
232 | static int | |
233 | hppa_hpux_child_can_run (void) | |
234 | { | |
eeca586f | 235 | /* This variable is controlled by modules that layer their own |
0d9b270c MK |
236 | process structure atop that provided here. The code in |
237 | hpux-thread.c does this to support the HP-UX user-mode DCE | |
238 | threads. */ | |
3f6306ec DA |
239 | return !child_suppress_run; |
240 | } | |
eeb8076c MK |
241 | \f |
242 | ||
243 | /* Prevent warning from -Wmissing-prototypes. */ | |
244 | void _initialize_hppa_hpux_nat (void); | |
245 | ||
246 | void | |
247 | _initialize_hppa_hpux_nat (void) | |
248 | { | |
249 | struct target_ops *t; | |
250 | ||
eee22bf8 MK |
251 | #ifdef HAVE_TTRACE |
252 | t = inf_ttrace_target (); | |
253 | #else | |
eeb8076c | 254 | t = inf_ptrace_target (); |
eee22bf8 MK |
255 | #endif |
256 | ||
eeb8076c MK |
257 | t->to_fetch_registers = hppa_hpux_fetch_inferior_registers; |
258 | t->to_store_registers = hppa_hpux_store_inferior_registers; | |
3f6306ec | 259 | t->to_can_run = hppa_hpux_child_can_run; |
eee22bf8 | 260 | |
eeb8076c MK |
261 | add_target (t); |
262 | } |