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d61ef735 | 1 | /* Unit test for _dl_addr_inside_object. |
581c785b | 2 | Copyright (C) 2016-2022 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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
d61ef735 CD |
18 | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <link.h> | |
22 | #include <elf.h> | |
23 | #include <libc-symbols.h> | |
24 | ||
17e00cc6 | 25 | extern int _dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr); |
d61ef735 CD |
26 | |
27 | static int | |
28 | do_test (void) | |
29 | { | |
30 | int ret, err = 0; | |
31 | ElfW(Addr) addr; | |
32 | struct link_map map; | |
33 | ElfW(Phdr) header; | |
34 | map.l_phdr = &header; | |
35 | map.l_phnum = 1; | |
36 | map.l_addr = 0x0; | |
37 | /* Segment spans 0x2000 -> 0x4000. */ | |
38 | header.p_vaddr = 0x2000; | |
39 | header.p_memsz = 0x2000; | |
40 | header.p_type = PT_LOAD; | |
41 | /* Address is above the segment e.g. > 0x4000. */ | |
42 | addr = 0x5000; | |
43 | ret = _dl_addr_inside_object (&map, addr); | |
44 | switch (ret) | |
45 | { | |
46 | case 0: | |
47 | printf ("PASS: Above: Address is detected as outside the segment.\n"); | |
48 | break; | |
49 | case 1: | |
50 | printf ("FAIL: Above: Address is detected as inside the segment.\n"); | |
51 | err++; | |
52 | break; | |
53 | default: | |
54 | printf ("FAIL: Above: Invalid return value.\n"); | |
55 | exit (1); | |
56 | } | |
57 | /* Address is inside the segment e.g. 0x2000 < addr < 0x4000. */ | |
58 | addr = 0x3000; | |
59 | ret = _dl_addr_inside_object (&map, addr); | |
60 | switch (ret) | |
61 | { | |
62 | case 0: | |
63 | printf ("FAIL: Inside: Address is detected as outside the segment.\n"); | |
64 | err++; | |
65 | break; | |
66 | case 1: | |
67 | printf ("PASS: Inside: Address is detected as inside the segment.\n"); | |
68 | break; | |
69 | default: | |
70 | printf ("FAIL: Inside: Invalid return value.\n"); | |
71 | exit (1); | |
72 | } | |
73 | /* Address is below the segment e.g. < 0x2000. */ | |
74 | addr = 0x1000; | |
75 | ret = _dl_addr_inside_object (&map, addr); | |
76 | switch (ret) | |
77 | { | |
78 | case 0: | |
79 | printf ("PASS: Below: Address is detected as outside the segment.\n"); | |
80 | break; | |
81 | case 1: | |
82 | printf ("FAIL: Below: Address is detected as inside the segment.\n"); | |
83 | err++; | |
84 | break; | |
85 | default: | |
86 | printf ("FAIL: Below: Invalid return value.\n"); | |
87 | exit (1); | |
88 | } | |
89 | /* Address is in the segment and addr == p_vaddr. */ | |
90 | addr = 0x2000; | |
91 | ret = _dl_addr_inside_object (&map, addr); | |
92 | switch (ret) | |
93 | { | |
94 | case 0: | |
95 | printf ("FAIL: At p_vaddr: Address is detected as outside the segment.\n"); | |
96 | err++; | |
97 | break; | |
98 | case 1: | |
99 | printf ("PASS: At p_vaddr: Address is detected as inside the segment.\n"); | |
100 | break; | |
101 | default: | |
102 | printf ("FAIL: At p_vaddr: Invalid return value.\n"); | |
103 | exit (1); | |
104 | } | |
105 | /* Address is in the segment and addr == p_vaddr + p_memsz - 1. */ | |
106 | addr = 0x2000 + 0x2000 - 0x1; | |
107 | ret = _dl_addr_inside_object (&map, addr); | |
108 | switch (ret) | |
109 | { | |
110 | case 0: | |
111 | printf ("FAIL: At p_memsz-1: Address is detected as outside the segment.\n"); | |
112 | err++; | |
113 | break; | |
114 | case 1: | |
115 | printf ("PASS: At p_memsz-1: Address is detected as inside the segment.\n"); | |
116 | break; | |
117 | default: | |
118 | printf ("FAIL: At p_memsz-1: Invalid return value.\n"); | |
119 | exit (1); | |
120 | } | |
121 | /* Address is outside the segment and addr == p_vaddr + p_memsz. */ | |
122 | addr = 0x2000 + 0x2000; | |
123 | ret = _dl_addr_inside_object (&map, addr); | |
124 | switch (ret) | |
125 | { | |
126 | case 0: | |
127 | printf ("PASS: At p_memsz: Address is detected as outside the segment.\n"); | |
128 | break; | |
129 | case 1: | |
130 | printf ("FAIL: At p_memsz: Address is detected as inside the segment.\n"); | |
131 | err++; | |
132 | break; | |
133 | default: | |
134 | printf ("FAIL: At p_memsz: Invalid return value.\n"); | |
135 | exit (1); | |
136 | } | |
137 | /* Address is outside the segment and p_vaddr at maximum address. */ | |
138 | addr = 0x0 - 0x2; | |
139 | header.p_vaddr = 0x0 - 0x1; | |
140 | header.p_memsz = 0x1; | |
141 | ret = _dl_addr_inside_object (&map, addr); | |
142 | switch (ret) | |
143 | { | |
144 | case 0: | |
145 | printf ("PASS: At max: Address is detected as outside the segment.\n"); | |
146 | break; | |
147 | case 1: | |
148 | printf ("FAIL: At max: Address is detected as inside the segment.\n"); | |
149 | err++; | |
150 | break; | |
151 | default: | |
152 | printf ("FAIL: At max: Invalid return value.\n"); | |
153 | exit (1); | |
154 | } | |
155 | /* Address is outside the segment and p_vaddr at minimum address. */ | |
156 | addr = 0x1; | |
157 | header.p_vaddr = 0x0; | |
158 | header.p_memsz = 0x1; | |
159 | ret = _dl_addr_inside_object (&map, addr); | |
160 | switch (ret) | |
161 | { | |
162 | case 0: | |
163 | printf ("PASS: At min: Address is detected as outside the segment.\n"); | |
164 | break; | |
165 | case 1: | |
166 | printf ("FAIL: At min: Address is detected as inside the segment.\n"); | |
167 | err++; | |
168 | break; | |
169 | default: | |
170 | printf ("FAIL: At min: Invalid return value.\n"); | |
171 | exit (1); | |
172 | } | |
173 | /* Address is always inside the segment with p_memsz at max. */ | |
174 | addr = 0x0; | |
175 | header.p_vaddr = 0x0; | |
176 | header.p_memsz = 0x0 - 0x1; | |
177 | ret = _dl_addr_inside_object (&map, addr); | |
178 | switch (ret) | |
179 | { | |
180 | case 0: | |
181 | printf ("FAIL: At maxmem: Address is detected as outside the segment.\n"); | |
182 | err++; | |
183 | break; | |
184 | case 1: | |
185 | printf ("PASS: At maxmem: Address is detected as inside the segment.\n"); | |
186 | break; | |
187 | default: | |
188 | printf ("FAIL: At maxmem: Invalid return value.\n"); | |
189 | exit (1); | |
190 | } | |
191 | /* Attempt to wrap addr into the segment. | |
192 | Pick a load address in the middle of the address space. | |
193 | Place the test address at 0x0 so it wraps to the middle again. */ | |
194 | map.l_addr = 0x0 - 0x1; | |
195 | map.l_addr = map.l_addr / 2; | |
196 | addr = 0; | |
197 | /* Setup a segment covering 1/2 the address space. */ | |
198 | header.p_vaddr = 0x0; | |
199 | header.p_memsz = 0x0 - 0x1 - map.l_addr; | |
200 | /* No matter where you place addr everything is shifted modulo l_addr | |
201 | and even with this underflow you're always 1 byte away from being | |
202 | in the range. */ | |
203 | ret = _dl_addr_inside_object (&map, addr); | |
204 | switch (ret) | |
205 | { | |
206 | case 0: | |
207 | printf ("PASS: Underflow: Address is detected as outside the segment.\n"); | |
208 | break; | |
209 | case 1: | |
210 | printf ("FAIL: Underflow: Address is detected as inside the segment.\n"); | |
211 | err++; | |
212 | break; | |
213 | default: | |
214 | printf ("FAIL: Underflow: Invalid return value.\n"); | |
215 | exit (1); | |
216 | } | |
217 | ||
218 | return err; | |
219 | } | |
220 | ||
36fe25fd | 221 | #include <support/test-driver.c> |