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1 | /* libthread_db helper functions for the remote server for GDB. | |
2 | Copyright (C) 2002-2019 Free Software Foundation, Inc. | |
3 | ||
4 | Contributed by MontaVista Software. | |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "server.h" | |
22 | ||
23 | /* This file is currently tied to GNU/Linux. It should scale well to | |
24 | another libthread_db implementation, with the approriate gdbserver | |
25 | hooks, but for now this means we can use GNU/Linux's target data. */ | |
26 | ||
27 | #include "linux-low.h" | |
28 | ||
29 | #include "gdb_proc_service.h" | |
30 | ||
31 | typedef struct ps_prochandle *gdb_ps_prochandle_t; | |
32 | typedef void *gdb_ps_read_buf_t; | |
33 | typedef const void *gdb_ps_write_buf_t; | |
34 | typedef size_t gdb_ps_size_t; | |
35 | ||
36 | #ifdef HAVE_LINUX_REGSETS | |
37 | #define HAVE_REGSETS | |
38 | #endif | |
39 | ||
40 | #ifdef HAVE_REGSETS | |
41 | static struct regset_info * | |
42 | gregset_info (void) | |
43 | { | |
44 | int i = 0; | |
45 | const struct regs_info *regs_info = (*the_low_target.regs_info) (); | |
46 | struct regsets_info *regsets_info = regs_info->regsets_info; | |
47 | ||
48 | while (regsets_info->regsets[i].size != -1) | |
49 | { | |
50 | if (regsets_info->regsets[i].type == GENERAL_REGS) | |
51 | break; | |
52 | i++; | |
53 | } | |
54 | ||
55 | return ®sets_info->regsets[i]; | |
56 | } | |
57 | #endif | |
58 | ||
59 | /* Search for the symbol named NAME within the object named OBJ within | |
60 | the target process PH. If the symbol is found the address of the | |
61 | symbol is stored in SYM_ADDR. */ | |
62 | ||
63 | ps_err_e | |
64 | ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj, | |
65 | const char *name, psaddr_t *sym_addr) | |
66 | { | |
67 | CORE_ADDR addr; | |
68 | ||
69 | if (thread_db_look_up_one_symbol (name, &addr) == 0) | |
70 | return PS_NOSYM; | |
71 | ||
72 | *sym_addr = (psaddr_t) (unsigned long) addr; | |
73 | return PS_OK; | |
74 | } | |
75 | ||
76 | /* Read SIZE bytes from the target process PH at address ADDR and copy | |
77 | them into BUF. */ | |
78 | ||
79 | ps_err_e | |
80 | ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr, | |
81 | gdb_ps_read_buf_t buf, gdb_ps_size_t size) | |
82 | { | |
83 | if (read_inferior_memory ((uintptr_t) addr, (gdb_byte *) buf, size) != 0) | |
84 | return PS_ERR; | |
85 | return PS_OK; | |
86 | } | |
87 | ||
88 | /* Write SIZE bytes from BUF into the target process PH at address ADDR. */ | |
89 | ||
90 | ps_err_e | |
91 | ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr, | |
92 | gdb_ps_write_buf_t buf, gdb_ps_size_t size) | |
93 | { | |
94 | if (target_write_memory ((uintptr_t) addr, (const gdb_byte *) buf, size) | |
95 | != 0) | |
96 | return PS_ERR; | |
97 | return PS_OK; | |
98 | } | |
99 | ||
100 | /* Get the general registers of LWP LWPID within the target process PH | |
101 | and store them in GREGSET. */ | |
102 | ||
103 | ps_err_e | |
104 | ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset) | |
105 | { | |
106 | #ifdef HAVE_REGSETS | |
107 | struct lwp_info *lwp; | |
108 | struct thread_info *reg_thread, *saved_thread; | |
109 | struct regcache *regcache; | |
110 | ||
111 | lwp = find_lwp_pid (ptid_t (lwpid)); | |
112 | if (lwp == NULL) | |
113 | return PS_ERR; | |
114 | ||
115 | reg_thread = get_lwp_thread (lwp); | |
116 | saved_thread = current_thread; | |
117 | current_thread = reg_thread; | |
118 | regcache = get_thread_regcache (current_thread, 1); | |
119 | gregset_info ()->fill_function (regcache, gregset); | |
120 | ||
121 | current_thread = saved_thread; | |
122 | return PS_OK; | |
123 | #else | |
124 | return PS_ERR; | |
125 | #endif | |
126 | } | |
127 | ||
128 | /* Set the general registers of LWP LWPID within the target process PH | |
129 | from GREGSET. */ | |
130 | ||
131 | ps_err_e | |
132 | ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset) | |
133 | { | |
134 | /* Unneeded. */ | |
135 | return PS_ERR; | |
136 | } | |
137 | ||
138 | /* Get the floating-point registers of LWP LWPID within the target | |
139 | process PH and store them in FPREGSET. */ | |
140 | ||
141 | ps_err_e | |
142 | ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prfpregset_t *fpregset) | |
143 | { | |
144 | /* Unneeded. */ | |
145 | return PS_ERR; | |
146 | } | |
147 | ||
148 | /* Set the floating-point registers of LWP LWPID within the target | |
149 | process PH from FPREGSET. */ | |
150 | ||
151 | ps_err_e | |
152 | ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prfpregset_t *fpregset) | |
153 | { | |
154 | /* Unneeded. */ | |
155 | return PS_ERR; | |
156 | } | |
157 | ||
158 | /* Return overall process id of the target PH. Special for GNU/Linux | |
159 | -- not used on Solaris. */ | |
160 | ||
161 | pid_t | |
162 | ps_getpid (gdb_ps_prochandle_t ph) | |
163 | { | |
164 | return pid_of (current_thread); | |
165 | } |