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db3cb7cb YQ |
1 | /* Copyright (C) 2009-2015 Free Software Foundation, Inc. |
2 | Contributed by ARM Ltd. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include "common-defs.h" | |
20 | #include "break-common.h" | |
21 | #include "nat/linux-nat.h" | |
22 | #include "nat/aarch64-linux-hw-point.h" | |
23 | #include "nat/aarch64-linux.h" | |
24 | ||
a0cc84cd YQ |
25 | #include "elf/common.h" |
26 | #include "nat/gdb_ptrace.h" | |
27 | #include <asm/ptrace.h> | |
28 | #include <sys/uio.h> | |
29 | ||
db3cb7cb YQ |
30 | /* Called when resuming a thread LWP. |
31 | The hardware debug registers are updated when there is any change. */ | |
32 | ||
33 | void | |
34 | aarch64_linux_prepare_to_resume (struct lwp_info *lwp) | |
35 | { | |
36 | struct arch_lwp_info *info = lwp_arch_private_info (lwp); | |
37 | ||
38 | /* NULL means this is the main thread still going through the shell, | |
39 | or, no watchpoint has been set yet. In that case, there's | |
40 | nothing to do. */ | |
41 | if (info == NULL) | |
42 | return; | |
43 | ||
44 | if (DR_HAS_CHANGED (info->dr_changed_bp) | |
45 | || DR_HAS_CHANGED (info->dr_changed_wp)) | |
46 | { | |
47 | ptid_t ptid = ptid_of_lwp (lwp); | |
48 | int tid = ptid_get_lwp (ptid); | |
49 | struct aarch64_debug_reg_state *state | |
50 | = aarch64_get_debug_reg_state (ptid_get_pid (ptid)); | |
51 | ||
52 | if (show_debug_regs) | |
53 | debug_printf ("prepare_to_resume thread %d\n", tid); | |
54 | ||
55 | /* Watchpoints. */ | |
56 | if (DR_HAS_CHANGED (info->dr_changed_wp)) | |
57 | { | |
58 | aarch64_linux_set_debug_regs (state, tid, 1); | |
59 | DR_CLEAR_CHANGED (info->dr_changed_wp); | |
60 | } | |
61 | ||
62 | /* Breakpoints. */ | |
63 | if (DR_HAS_CHANGED (info->dr_changed_bp)) | |
64 | { | |
65 | aarch64_linux_set_debug_regs (state, tid, 0); | |
66 | DR_CLEAR_CHANGED (info->dr_changed_bp); | |
67 | } | |
68 | } | |
69 | } | |
ed8b7b42 YQ |
70 | |
71 | /* Function to call when a new thread is detected. */ | |
72 | ||
73 | void | |
74 | aarch64_linux_new_thread (struct lwp_info *lwp) | |
75 | { | |
8d749320 | 76 | struct arch_lwp_info *info = XNEW (struct arch_lwp_info); |
ed8b7b42 YQ |
77 | |
78 | /* Mark that all the hardware breakpoint/watchpoint register pairs | |
79 | for this thread need to be initialized (with data from | |
80 | aarch_process_info.debug_reg_state). */ | |
81 | DR_MARK_ALL_CHANGED (info->dr_changed_bp, aarch64_num_bp_regs); | |
82 | DR_MARK_ALL_CHANGED (info->dr_changed_wp, aarch64_num_wp_regs); | |
83 | ||
84 | lwp_set_arch_private_info (lwp, info); | |
85 | } | |
ade90bde YQ |
86 | |
87 | /* Convert native siginfo FROM to the siginfo in the layout of the | |
88 | inferior's architecture TO. */ | |
89 | ||
90 | void | |
91 | aarch64_compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) | |
92 | { | |
93 | memset (to, 0, sizeof (*to)); | |
94 | ||
95 | to->si_signo = from->si_signo; | |
96 | to->si_errno = from->si_errno; | |
97 | to->si_code = from->si_code; | |
98 | ||
99 | if (to->si_code == SI_TIMER) | |
100 | { | |
101 | to->cpt_si_timerid = from->si_timerid; | |
102 | to->cpt_si_overrun = from->si_overrun; | |
103 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
104 | } | |
105 | else if (to->si_code == SI_USER) | |
106 | { | |
107 | to->cpt_si_pid = from->si_pid; | |
108 | to->cpt_si_uid = from->si_uid; | |
109 | } | |
110 | else if (to->si_code < 0) | |
111 | { | |
112 | to->cpt_si_pid = from->si_pid; | |
113 | to->cpt_si_uid = from->si_uid; | |
114 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
115 | } | |
116 | else | |
117 | { | |
118 | switch (to->si_signo) | |
119 | { | |
120 | case SIGCHLD: | |
121 | to->cpt_si_pid = from->si_pid; | |
122 | to->cpt_si_uid = from->si_uid; | |
123 | to->cpt_si_status = from->si_status; | |
124 | to->cpt_si_utime = from->si_utime; | |
125 | to->cpt_si_stime = from->si_stime; | |
126 | break; | |
127 | case SIGILL: | |
128 | case SIGFPE: | |
129 | case SIGSEGV: | |
130 | case SIGBUS: | |
131 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
132 | break; | |
133 | case SIGPOLL: | |
134 | to->cpt_si_band = from->si_band; | |
135 | to->cpt_si_fd = from->si_fd; | |
136 | break; | |
137 | default: | |
138 | to->cpt_si_pid = from->si_pid; | |
139 | to->cpt_si_uid = from->si_uid; | |
140 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
141 | break; | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | /* Convert inferior's architecture siginfo FROM to native siginfo TO. */ | |
147 | ||
148 | void | |
149 | aarch64_siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) | |
150 | { | |
151 | memset (to, 0, sizeof (*to)); | |
152 | ||
153 | to->si_signo = from->si_signo; | |
154 | to->si_errno = from->si_errno; | |
155 | to->si_code = from->si_code; | |
156 | ||
157 | if (to->si_code == SI_TIMER) | |
158 | { | |
159 | to->si_timerid = from->cpt_si_timerid; | |
160 | to->si_overrun = from->cpt_si_overrun; | |
161 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
162 | } | |
163 | else if (to->si_code == SI_USER) | |
164 | { | |
165 | to->si_pid = from->cpt_si_pid; | |
166 | to->si_uid = from->cpt_si_uid; | |
167 | } | |
168 | if (to->si_code < 0) | |
169 | { | |
170 | to->si_pid = from->cpt_si_pid; | |
171 | to->si_uid = from->cpt_si_uid; | |
172 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
173 | } | |
174 | else | |
175 | { | |
176 | switch (to->si_signo) | |
177 | { | |
178 | case SIGCHLD: | |
179 | to->si_pid = from->cpt_si_pid; | |
180 | to->si_uid = from->cpt_si_uid; | |
181 | to->si_status = from->cpt_si_status; | |
182 | to->si_utime = from->cpt_si_utime; | |
183 | to->si_stime = from->cpt_si_stime; | |
184 | break; | |
185 | case SIGILL: | |
186 | case SIGFPE: | |
187 | case SIGSEGV: | |
188 | case SIGBUS: | |
189 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
190 | break; | |
191 | case SIGPOLL: | |
192 | to->si_band = from->cpt_si_band; | |
193 | to->si_fd = from->cpt_si_fd; | |
194 | break; | |
195 | default: | |
196 | to->si_pid = from->cpt_si_pid; | |
197 | to->si_uid = from->cpt_si_uid; | |
198 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
199 | break; | |
200 | } | |
201 | } | |
202 | } | |
a0cc84cd YQ |
203 | |
204 | /* Called by libthread_db. Returns a pointer to the thread local | |
205 | storage (or its descriptor). */ | |
206 | ||
207 | ps_err_e | |
208 | aarch64_ps_get_thread_area (const struct ps_prochandle *ph, | |
209 | lwpid_t lwpid, int idx, void **base, | |
210 | int is_64bit_p) | |
211 | { | |
212 | struct iovec iovec; | |
213 | uint64_t reg64; | |
214 | uint32_t reg32; | |
215 | ||
216 | if (is_64bit_p) | |
217 | { | |
218 | iovec.iov_base = ®64; | |
219 | iovec.iov_len = sizeof (reg64); | |
220 | } | |
221 | else | |
222 | { | |
223 | iovec.iov_base = ®32; | |
224 | iovec.iov_len = sizeof (reg32); | |
225 | } | |
226 | ||
227 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
228 | return PS_ERR; | |
229 | ||
230 | /* IDX is the bias from the thread pointer to the beginning of the | |
231 | thread descriptor. It has to be subtracted due to implementation | |
232 | quirks in libthread_db. */ | |
233 | if (is_64bit_p) | |
234 | *base = (void *) (reg64 - idx); | |
235 | else | |
236 | *base = (void *) (uintptr_t) (reg32 - idx); | |
237 | ||
238 | return PS_OK; | |
239 | } |