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d61ef735 | 1 | /* Unit test for _dl_addr_inside_object. |
bfff8b1b | 2 | Copyright (C) 2016-2017 Free Software Foundation, Inc. |
d61ef735 CD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <link.h> | |
22 | #include <elf.h> | |
23 | #include <libc-symbols.h> | |
24 | ||
25 | extern int internal_function _dl_addr_inside_object (struct link_map *l, | |
26 | const ElfW(Addr) addr); | |
27 | ||
28 | static int | |
29 | do_test (void) | |
30 | { | |
31 | int ret, err = 0; | |
32 | ElfW(Addr) addr; | |
33 | struct link_map map; | |
34 | ElfW(Phdr) header; | |
35 | map.l_phdr = &header; | |
36 | map.l_phnum = 1; | |
37 | map.l_addr = 0x0; | |
38 | /* Segment spans 0x2000 -> 0x4000. */ | |
39 | header.p_vaddr = 0x2000; | |
40 | header.p_memsz = 0x2000; | |
41 | header.p_type = PT_LOAD; | |
42 | /* Address is above the segment e.g. > 0x4000. */ | |
43 | addr = 0x5000; | |
44 | ret = _dl_addr_inside_object (&map, addr); | |
45 | switch (ret) | |
46 | { | |
47 | case 0: | |
48 | printf ("PASS: Above: Address is detected as outside the segment.\n"); | |
49 | break; | |
50 | case 1: | |
51 | printf ("FAIL: Above: Address is detected as inside the segment.\n"); | |
52 | err++; | |
53 | break; | |
54 | default: | |
55 | printf ("FAIL: Above: Invalid return value.\n"); | |
56 | exit (1); | |
57 | } | |
58 | /* Address is inside the segment e.g. 0x2000 < addr < 0x4000. */ | |
59 | addr = 0x3000; | |
60 | ret = _dl_addr_inside_object (&map, addr); | |
61 | switch (ret) | |
62 | { | |
63 | case 0: | |
64 | printf ("FAIL: Inside: Address is detected as outside the segment.\n"); | |
65 | err++; | |
66 | break; | |
67 | case 1: | |
68 | printf ("PASS: Inside: Address is detected as inside the segment.\n"); | |
69 | break; | |
70 | default: | |
71 | printf ("FAIL: Inside: Invalid return value.\n"); | |
72 | exit (1); | |
73 | } | |
74 | /* Address is below the segment e.g. < 0x2000. */ | |
75 | addr = 0x1000; | |
76 | ret = _dl_addr_inside_object (&map, addr); | |
77 | switch (ret) | |
78 | { | |
79 | case 0: | |
80 | printf ("PASS: Below: Address is detected as outside the segment.\n"); | |
81 | break; | |
82 | case 1: | |
83 | printf ("FAIL: Below: Address is detected as inside the segment.\n"); | |
84 | err++; | |
85 | break; | |
86 | default: | |
87 | printf ("FAIL: Below: Invalid return value.\n"); | |
88 | exit (1); | |
89 | } | |
90 | /* Address is in the segment and addr == p_vaddr. */ | |
91 | addr = 0x2000; | |
92 | ret = _dl_addr_inside_object (&map, addr); | |
93 | switch (ret) | |
94 | { | |
95 | case 0: | |
96 | printf ("FAIL: At p_vaddr: Address is detected as outside the segment.\n"); | |
97 | err++; | |
98 | break; | |
99 | case 1: | |
100 | printf ("PASS: At p_vaddr: Address is detected as inside the segment.\n"); | |
101 | break; | |
102 | default: | |
103 | printf ("FAIL: At p_vaddr: Invalid return value.\n"); | |
104 | exit (1); | |
105 | } | |
106 | /* Address is in the segment and addr == p_vaddr + p_memsz - 1. */ | |
107 | addr = 0x2000 + 0x2000 - 0x1; | |
108 | ret = _dl_addr_inside_object (&map, addr); | |
109 | switch (ret) | |
110 | { | |
111 | case 0: | |
112 | printf ("FAIL: At p_memsz-1: Address is detected as outside the segment.\n"); | |
113 | err++; | |
114 | break; | |
115 | case 1: | |
116 | printf ("PASS: At p_memsz-1: Address is detected as inside the segment.\n"); | |
117 | break; | |
118 | default: | |
119 | printf ("FAIL: At p_memsz-1: Invalid return value.\n"); | |
120 | exit (1); | |
121 | } | |
122 | /* Address is outside the segment and addr == p_vaddr + p_memsz. */ | |
123 | addr = 0x2000 + 0x2000; | |
124 | ret = _dl_addr_inside_object (&map, addr); | |
125 | switch (ret) | |
126 | { | |
127 | case 0: | |
128 | printf ("PASS: At p_memsz: Address is detected as outside the segment.\n"); | |
129 | break; | |
130 | case 1: | |
131 | printf ("FAIL: At p_memsz: Address is detected as inside the segment.\n"); | |
132 | err++; | |
133 | break; | |
134 | default: | |
135 | printf ("FAIL: At p_memsz: Invalid return value.\n"); | |
136 | exit (1); | |
137 | } | |
138 | /* Address is outside the segment and p_vaddr at maximum address. */ | |
139 | addr = 0x0 - 0x2; | |
140 | header.p_vaddr = 0x0 - 0x1; | |
141 | header.p_memsz = 0x1; | |
142 | ret = _dl_addr_inside_object (&map, addr); | |
143 | switch (ret) | |
144 | { | |
145 | case 0: | |
146 | printf ("PASS: At max: Address is detected as outside the segment.\n"); | |
147 | break; | |
148 | case 1: | |
149 | printf ("FAIL: At max: Address is detected as inside the segment.\n"); | |
150 | err++; | |
151 | break; | |
152 | default: | |
153 | printf ("FAIL: At max: Invalid return value.\n"); | |
154 | exit (1); | |
155 | } | |
156 | /* Address is outside the segment and p_vaddr at minimum address. */ | |
157 | addr = 0x1; | |
158 | header.p_vaddr = 0x0; | |
159 | header.p_memsz = 0x1; | |
160 | ret = _dl_addr_inside_object (&map, addr); | |
161 | switch (ret) | |
162 | { | |
163 | case 0: | |
164 | printf ("PASS: At min: Address is detected as outside the segment.\n"); | |
165 | break; | |
166 | case 1: | |
167 | printf ("FAIL: At min: Address is detected as inside the segment.\n"); | |
168 | err++; | |
169 | break; | |
170 | default: | |
171 | printf ("FAIL: At min: Invalid return value.\n"); | |
172 | exit (1); | |
173 | } | |
174 | /* Address is always inside the segment with p_memsz at max. */ | |
175 | addr = 0x0; | |
176 | header.p_vaddr = 0x0; | |
177 | header.p_memsz = 0x0 - 0x1; | |
178 | ret = _dl_addr_inside_object (&map, addr); | |
179 | switch (ret) | |
180 | { | |
181 | case 0: | |
182 | printf ("FAIL: At maxmem: Address is detected as outside the segment.\n"); | |
183 | err++; | |
184 | break; | |
185 | case 1: | |
186 | printf ("PASS: At maxmem: Address is detected as inside the segment.\n"); | |
187 | break; | |
188 | default: | |
189 | printf ("FAIL: At maxmem: Invalid return value.\n"); | |
190 | exit (1); | |
191 | } | |
192 | /* Attempt to wrap addr into the segment. | |
193 | Pick a load address in the middle of the address space. | |
194 | Place the test address at 0x0 so it wraps to the middle again. */ | |
195 | map.l_addr = 0x0 - 0x1; | |
196 | map.l_addr = map.l_addr / 2; | |
197 | addr = 0; | |
198 | /* Setup a segment covering 1/2 the address space. */ | |
199 | header.p_vaddr = 0x0; | |
200 | header.p_memsz = 0x0 - 0x1 - map.l_addr; | |
201 | /* No matter where you place addr everything is shifted modulo l_addr | |
202 | and even with this underflow you're always 1 byte away from being | |
203 | in the range. */ | |
204 | ret = _dl_addr_inside_object (&map, addr); | |
205 | switch (ret) | |
206 | { | |
207 | case 0: | |
208 | printf ("PASS: Underflow: Address is detected as outside the segment.\n"); | |
209 | break; | |
210 | case 1: | |
211 | printf ("FAIL: Underflow: Address is detected as inside the segment.\n"); | |
212 | err++; | |
213 | break; | |
214 | default: | |
215 | printf ("FAIL: Underflow: Invalid return value.\n"); | |
216 | exit (1); | |
217 | } | |
218 | ||
219 | return err; | |
220 | } | |
221 | ||
36fe25fd | 222 | #include <support/test-driver.c> |