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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Jiri Svoboda |
2 | * Copyright (c) 2008 Jiri Svoboda |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup rtld rtld |
29 | /** @addtogroup rtld rtld |
30 | * @brief |
30 | * @brief |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <sys/types.h> |
37 | #include <sys/types.h> |
38 | #include <align.h> |
38 | #include <align.h> |
39 | #include <tls.h> |
39 | #include <tls.h> |
40 | 40 | ||
41 | void _putint(int i); |
41 | void _putint(int i); |
42 | /* FIXME */ |
42 | /* FIXME */ |
43 | void __udivdi3(void); |
43 | void __udivdi3(void); |
44 | void __umoddi3(void); |
44 | void __umoddi3(void); |
45 | 45 | ||
46 | static void kputint(unsigned i) |
46 | static void kputint(unsigned i) |
47 | { |
47 | { |
48 | unsigned dummy; |
48 | unsigned dummy; |
49 | asm volatile ( |
49 | asm volatile ( |
50 | "movl $30, %%eax;" |
50 | "movl $30, %%eax;" |
51 | "int $0x30" |
51 | "int $0x30" |
52 | : "=d" (dummy) /* output - %edx clobbered */ |
52 | : "=d" (dummy) /* output - %edx clobbered */ |
53 | : "d" (i) /* input */ |
53 | : "d" (i) /* input */ |
54 | : "%eax","%ecx" /* all scratch registers clobbered */ |
54 | : "%eax","%ecx" /* all scratch registers clobbered */ |
55 | ); |
55 | ); |
56 | } |
56 | } |
57 | 57 | ||
58 | typedef struct { |
58 | typedef struct { |
59 | unsigned long int ti_module; |
59 | unsigned long int ti_module; |
60 | unsigned long int ti_offset; |
60 | unsigned long int ti_offset; |
61 | } tls_index; |
61 | } tls_index; |
62 | 62 | ||
63 | void __attribute__ ((__regparm__ (1))) |
63 | void __attribute__ ((__regparm__ (1))) |
64 | *___tls_get_addr(tls_index *ti); |
64 | *___tls_get_addr(tls_index *ti); |
65 | 65 | ||
66 | void __attribute__ ((__regparm__ (1))) |
66 | void __attribute__ ((__regparm__ (1))) |
67 | *___tls_get_addr(tls_index *ti) |
67 | *___tls_get_addr(tls_index *ti) |
68 | { |
68 | { |
69 | size_t tls_size; |
69 | size_t tls_size; |
70 | uint8_t *tls; |
70 | uint8_t *tls; |
71 | 71 | ||
72 | /* Calculate size of TLS block */ |
72 | /* Calculate size of TLS block */ |
73 | tls_size = ALIGN_UP(&_tbss_end - &_tdata_start, &_tls_alignment); |
73 | tls_size = ALIGN_UP(&_tbss_end - &_tdata_start, &_tls_alignment); |
74 | 74 | ||
75 | /* The TLS block is just before TCB */ |
75 | /* The TLS block is just before TCB */ |
76 | tls = (uint8_t *)__tcb_get() - tls_size; |
76 | tls = (uint8_t *)__tcb_get() - tls_size; |
77 | 77 | ||
78 | return tls + ti->ti_offset; |
78 | return tls + ti->ti_offset; |
79 | } |
79 | } |
80 | 80 | ||
81 | void __umoddi3(void) |
- | |
82 | { |
- | |
83 | kputint(0x101); |
- | |
84 | *(int *)0 = 0; /* cause a page fault */ |
- | |
85 | } |
- | |
86 | - | ||
87 | void __udivdi3(void) |
- | |
88 | { |
- | |
89 | kputint(0x102); |
- | |
90 | *(int *)0 = 0; /* cause a page fault */ |
- | |
91 | } |
- | |
92 | - | ||
93 | void _putint(int i) |
81 | void _putint(int i) |
94 | { |
82 | { |
95 | } |
83 | } |
96 | 84 | ||
97 | /** @} |
85 | /** @} |
98 | */ |
86 | */ |
99 | 87 |