FreeBSD/Linux Kernel Cross Reference
sys/kern/linker_if.m
1 #-
2 # Copyright (c) 2000 Doug Rabson
3 # All rights reserved.
4 #
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions
7 # are met:
8 # 1. Redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer.
10 # 2. Redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution.
13 #
14 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 # SUCH DAMAGE.
25 #
26 # $FreeBSD$
27 #
28
29 #include <sys/linker.h>
30
31 INTERFACE linker;
32
33 #
34 # Lookup a symbol in the file's symbol table. If the symbol is not
35 # found then return ENOENT, otherwise zero.
36 #
37 METHOD int lookup_symbol {
38 linker_file_t file;
39 const char* name;
40 c_linker_sym_t* symp;
41 };
42
43 METHOD int symbol_values {
44 linker_file_t file;
45 c_linker_sym_t sym;
46 linker_symval_t* valp;
47 };
48
49 METHOD int search_symbol {
50 linker_file_t file;
51 caddr_t value;
52 c_linker_sym_t* symp;
53 long* diffp;
54 };
55
56 #
57 # Call the callback with each specified function defined in the file.
58 # Stop and return the error if the callback returns an error.
59 #
60 METHOD int each_function_name {
61 linker_file_t file;
62 linker_function_name_callback_t callback;
63 void* opaque;
64 };
65
66 #
67 # Call the callback with each specified function and it's value
68 # defined in the file.
69 # Stop and return the error if the callback returns an error.
70 #
71 METHOD int each_function_nameval {
72 linker_file_t file;
73 linker_function_nameval_callback_t callback;
74 void* opaque;
75 };
76
77 #
78 # Search for a linker set in a file. Return a pointer to the first
79 # entry (which is itself a pointer), and the number of entries.
80 # "stop" points to the entry beyond the last valid entry.
81 # If count, start or stop are NULL, they are not returned.
82 #
83 METHOD int lookup_set {
84 linker_file_t file;
85 const char* name;
86 void*** start;
87 void*** stop;
88 int* count;
89 };
90
91 #
92 # Unload a file, releasing dependancies and freeing storage.
93 #
94 METHOD void unload {
95 linker_file_t file;
96 };
97
98 #
99 # Load CTF data if necessary and if there is a .SUNW_ctf section
100 # in the ELF file, returning info in the linker CTF structure.
101 #
102 METHOD int ctf_get {
103 linker_file_t file;
104 linker_ctf_t *lc;
105 };
106
107 #
108 # Load a file, returning the new linker_file_t in *result. If
109 # the class does not recognise the file type, zero should be
110 # returned, without modifying *result. If the file is
111 # recognised, the file should be loaded, *result set to the new
112 # file and zero returned. If some other error is detected an
113 # appropriate errno should be returned.
114 #
115 STATICMETHOD int load_file {
116 linker_class_t cls;
117 const char* filename;
118 linker_file_t* result;
119 };
120 STATICMETHOD int link_preload {
121 linker_class_t cls;
122 const char* filename;
123 linker_file_t* result;
124 };
125 METHOD int link_preload_finish {
126 linker_file_t file;
127 };
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