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
31INTERFACE 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#
37METHOD int lookup_symbol {
38    linker_file_t	file;
39    const char*		name;
40    c_linker_sym_t*	symp;
41};
42
43METHOD int symbol_values {
44    linker_file_t	file;
45    c_linker_sym_t	sym;
46    linker_symval_t*	valp;
47};
48
49METHOD 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#
60METHOD 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#
71METHOD 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#
83METHOD 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 dependencies and freeing storage.
93#
94METHOD 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#
102METHOD int ctf_get {
103	linker_file_t	file;
104	linker_ctf_t	*lc;
105};
106
107#
108# Get the symbol table, returning it in **symtab.  Return the 
109# number of symbols, otherwise zero.
110#
111METHOD long symtab_get {
112	linker_file_t	file;
113	const Elf_Sym	**symtab;
114};
115
116#
117# Get the string table, returning it in *strtab.  Return the
118# size (in bytes) of the string table, otherwise zero.
119#
120METHOD long strtab_get {
121	linker_file_t	file;
122	caddr_t		*strtab;
123};
124
125#
126# Load a file, returning the new linker_file_t in *result.  If
127# the class does not recognise the file type, zero should be
128# returned, without modifying *result.  If the file is
129# recognised, the file should be loaded, *result set to the new
130# file and zero returned.  If some other error is detected an
131# appropriate errno should be returned.
132#
133STATICMETHOD int load_file {
134    linker_class_t	cls;
135    const char*		filename;
136    linker_file_t*	result;
137};
138STATICMETHOD int link_preload {
139    linker_class_t	cls;
140    const char*		filename;
141    linker_file_t*	result;
142};
143METHOD int link_preload_finish {
144    linker_file_t	file;
145};
146