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eeb8076c MK |
1 | /* Native-dependent code for PA-RISC HP-UX. |
2 | ||
6aba47ca | 3 | Copyright (C) 2004, 2005, 2007 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 | |
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 | |
197e01b6 EZ |
19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
eeb8076c MK |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "regcache.h" | |
25 | #include "target.h" | |
26 | ||
27 | #include "gdb_assert.h" | |
28 | #include <sys/ptrace.h> | |
29 | #include <machine/save_state.h> | |
30 | ||
eee22bf8 MK |
31 | #ifdef HAVE_TTRACE |
32 | #include <sys/ttrace.h> | |
33 | #endif | |
34 | ||
eeb8076c MK |
35 | #include "hppa-tdep.h" |
36 | #include "inf-ptrace.h" | |
eee22bf8 MK |
37 | #include "inf-ttrace.h" |
38 | ||
eeca586f MK |
39 | /* Non-zero if we should pretend not to be a runnable target. */ |
40 | int child_suppress_run = 0; | |
eeb8076c | 41 | |
eeca586f MK |
42 | /* Return the offset of register REGNUM within `struct save_state'. |
43 | The offset returns depends on the flags in the "flags" register and | |
44 | the register size (32-bit or 64-bit). These are taken from | |
45 | REGCACHE. */ | |
3f6306ec | 46 | |
eeca586f MK |
47 | LONGEST |
48 | hppa_hpux_save_state_offset (struct regcache *regcache, int regnum) | |
eeb8076c | 49 | { |
eeca586f | 50 | LONGEST offset; |
eeb8076c | 51 | |
eeca586f MK |
52 | if (regnum == HPPA_FLAGS_REGNUM) |
53 | return ssoff (ss_flags); | |
eeb8076c | 54 | |
eeca586f MK |
55 | if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM) |
56 | { | |
57 | struct gdbarch *arch = get_regcache_arch (regcache); | |
58 | size_t size = register_size (arch, HPPA_R1_REGNUM); | |
59 | ULONGEST flags; | |
60 | ||
61 | gdb_assert (size == 4 || size == 8); | |
62 | ||
63 | regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags); | |
64 | if (flags & SS_WIDEREGS) | |
65 | offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8; | |
66 | else | |
67 | offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4; | |
68 | } | |
69 | else | |
70 | { | |
71 | struct gdbarch *arch = get_regcache_arch (regcache); | |
72 | size_t size = register_size (arch, HPPA_FP0_REGNUM); | |
73 | ||
74 | gdb_assert (size == 4 || size == 8); | |
75 | gdb_assert (regnum >= HPPA_FP0_REGNUM); | |
76 | offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size; | |
77 | } | |
78 | ||
79 | gdb_assert (offset < sizeof (save_state_t)); | |
80 | return offset; | |
eeb8076c MK |
81 | } |
82 | ||
eee22bf8 MK |
83 | /* Just in case a future version of PA-RISC HP-UX won't have ptrace(2) |
84 | at all. */ | |
85 | #ifndef PTRACE_TYPE_RET | |
86 | #define PTRACE_TYPE_RET void | |
87 | #endif | |
88 | ||
eeb8076c | 89 | static void |
56be3814 | 90 | hppa_hpux_fetch_register (struct regcache *regcache, int regnum) |
eeb8076c MK |
91 | { |
92 | CORE_ADDR addr; | |
93 | size_t size; | |
94 | PTRACE_TYPE_RET *buf; | |
95 | pid_t pid; | |
96 | int i; | |
97 | ||
eee22bf8 | 98 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 99 | |
eeca586f | 100 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 101 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
eeb8076c MK |
102 | size = register_size (current_gdbarch, regnum); |
103 | ||
eee22bf8 | 104 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
105 | buf = alloca (size); |
106 | ||
eee22bf8 MK |
107 | #ifdef HAVE_TTRACE |
108 | { | |
109 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
110 | ||
111 | if (ttrace (TT_LWP_RUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 112 | error (_("Couldn't read register %s (#%d): %s"), |
c9f4d572 UW |
113 | gdbarch_register_name (current_gdbarch, regnum), |
114 | regnum, safe_strerror (errno)); | |
eee22bf8 MK |
115 | } |
116 | #else | |
117 | { | |
118 | int i; | |
119 | ||
120 | /* Read the register contents from the inferior a chuck at the time. */ | |
121 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
122 | { | |
123 | errno = 0; | |
124 | buf[i] = ptrace (PT_RUREGS, pid, (PTRACE_TYPE_ARG3) addr, 0, 0); | |
125 | if (errno != 0) | |
8a3fe4f8 | 126 | error (_("Couldn't read register %s (#%d): %s"), |
c9f4d572 UW |
127 | gdbarch_register_name (current_gdbarch, regnum), |
128 | regnum, safe_strerror (errno)); | |
eee22bf8 MK |
129 | |
130 | addr += sizeof (PTRACE_TYPE_RET); | |
131 | } | |
132 | } | |
133 | #endif | |
eeb8076c | 134 | |
eeca586f MK |
135 | /* Take care with the "flags" register. It's stored as an `int' in |
136 | `struct save_state', even for 64-bit code. */ | |
137 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
138 | { | |
0d559b99 MK |
139 | ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 4); |
140 | store_unsigned_integer ((gdb_byte *)buf, 8, flags); | |
eeca586f MK |
141 | } |
142 | ||
56be3814 | 143 | regcache_raw_supply (regcache, regnum, buf); |
eeb8076c MK |
144 | } |
145 | ||
146 | static void | |
56be3814 | 147 | hppa_hpux_fetch_inferior_registers (struct regcache *regcache, int regnum) |
eeb8076c MK |
148 | { |
149 | if (regnum == -1) | |
f57d151a | 150 | for (regnum = 0; regnum < gdbarch_num_regs (current_gdbarch); regnum++) |
56be3814 | 151 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c | 152 | else |
56be3814 | 153 | hppa_hpux_fetch_register (regcache, regnum); |
eeb8076c MK |
154 | } |
155 | ||
156 | /* Store register REGNUM into the inferior. */ | |
157 | ||
158 | static void | |
56be3814 | 159 | hppa_hpux_store_register (struct regcache *regcache, int regnum) |
eeb8076c MK |
160 | { |
161 | CORE_ADDR addr; | |
162 | size_t size; | |
163 | PTRACE_TYPE_RET *buf; | |
164 | pid_t pid; | |
eeb8076c | 165 | |
eee22bf8 | 166 | pid = ptid_get_pid (inferior_ptid); |
eeb8076c | 167 | |
eeca586f | 168 | /* This isn't really an address, but ptrace thinks of it as one. */ |
56be3814 | 169 | addr = hppa_hpux_save_state_offset (regcache, regnum); |
eeb8076c MK |
170 | size = register_size (current_gdbarch, regnum); |
171 | ||
eee22bf8 | 172 | gdb_assert (size == 4 || size == 8); |
eeb8076c MK |
173 | buf = alloca (size); |
174 | ||
56be3814 | 175 | regcache_raw_collect (regcache, regnum, buf); |
eeb8076c | 176 | |
eeca586f MK |
177 | /* Take care with the "flags" register. It's stored as an `int' in |
178 | `struct save_state', even for 64-bit code. */ | |
179 | if (regnum == HPPA_FLAGS_REGNUM && size == 8) | |
180 | { | |
0d559b99 MK |
181 | ULONGEST flags = extract_unsigned_integer ((gdb_byte *)buf, 8); |
182 | store_unsigned_integer ((gdb_byte *)buf, 4, flags); | |
eeca586f MK |
183 | size = 4; |
184 | } | |
185 | ||
eee22bf8 MK |
186 | #ifdef HAVE_TTRACE |
187 | { | |
188 | lwpid_t lwp = ptid_get_lwp (inferior_ptid); | |
189 | ||
190 | if (ttrace (TT_LWP_WUREGS, pid, lwp, addr, size, (uintptr_t)buf) == -1) | |
8a3fe4f8 | 191 | error (_("Couldn't write register %s (#%d): %s"), |
c9f4d572 UW |
192 | gdbarch_register_name (current_gdbarch, regnum), |
193 | regnum, safe_strerror (errno)); | |
eee22bf8 MK |
194 | } |
195 | #else | |
196 | { | |
197 | int i; | |
198 | ||
199 | /* Write the register contents into the inferior a chunk at the time. */ | |
200 | for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++) | |
201 | { | |
202 | errno = 0; | |
203 | ptrace (PT_WUREGS, pid, (PTRACE_TYPE_ARG3) addr, buf[i], 0); | |
204 | if (errno != 0) | |
8a3fe4f8 | 205 | error (_("Couldn't write register %s (#%d): %s"), |
c9f4d572 UW |
206 | gdbarch_register_name (current_gdbarch, regnum), |
207 | regnum, safe_strerror (errno)); | |
eee22bf8 MK |
208 | |
209 | addr += sizeof (PTRACE_TYPE_RET); | |
210 | } | |
211 | } | |
212 | #endif | |
eeb8076c MK |
213 | } |
214 | ||
215 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do | |
216 | this for all registers (including the floating point registers). */ | |
217 | ||
218 | static void | |
56be3814 | 219 | hppa_hpux_store_inferior_registers (struct regcache *regcache, int regnum) |
eeb8076c MK |
220 | { |
221 | if (regnum == -1) | |
f57d151a | 222 | for (regnum = 0; regnum < gdbarch_num_regs (current_gdbarch); regnum++) |
56be3814 | 223 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 224 | else |
56be3814 | 225 | hppa_hpux_store_register (regcache, regnum); |
eeb8076c | 226 | } |
3f6306ec DA |
227 | |
228 | static int | |
229 | hppa_hpux_child_can_run (void) | |
230 | { | |
eeca586f | 231 | /* This variable is controlled by modules that layer their own |
0d9b270c MK |
232 | process structure atop that provided here. The code in |
233 | hpux-thread.c does this to support the HP-UX user-mode DCE | |
234 | threads. */ | |
3f6306ec DA |
235 | return !child_suppress_run; |
236 | } | |
eeb8076c MK |
237 | \f |
238 | ||
239 | /* Prevent warning from -Wmissing-prototypes. */ | |
240 | void _initialize_hppa_hpux_nat (void); | |
241 | ||
242 | void | |
243 | _initialize_hppa_hpux_nat (void) | |
244 | { | |
245 | struct target_ops *t; | |
246 | ||
eee22bf8 MK |
247 | #ifdef HAVE_TTRACE |
248 | t = inf_ttrace_target (); | |
249 | #else | |
eeb8076c | 250 | t = inf_ptrace_target (); |
eee22bf8 MK |
251 | #endif |
252 | ||
eeb8076c MK |
253 | t->to_fetch_registers = hppa_hpux_fetch_inferior_registers; |
254 | t->to_store_registers = hppa_hpux_store_inferior_registers; | |
3f6306ec | 255 | t->to_can_run = hppa_hpux_child_can_run; |
eee22bf8 | 256 | |
eeb8076c MK |
257 | add_target (t); |
258 | } |