1 // SPDX-License-Identifier: GPL-2.0
2 #include "symbol/kallsyms.h"
3 #include "api/io.h"
4 #include <stdio.h>
5 #include <sys/stat.h>
6 #include <fcntl.h>
7
8 u8 kallsyms2elf_type(char type)
9 {
10 type = tolower(type);
11 return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
12 }
13
14 bool kallsyms__is_function(char symbol_type)
15 {
16 symbol_type = toupper(symbol_type);
17 return symbol_type == 'T' || symbol_type == 'W';
18 }
19
20 static void read_to_eol(struct io *io)
21 {
22 int ch;
23
24 for (;;) {
25 ch = io__get_char(io);
26 if (ch < 0 || ch == '\n')
27 return;
28 }
29 }
30
31 int kallsyms__parse(const char *filename, void *arg,
32 int (*process_symbol)(void *arg, const char *name,
33 char type, u64 start))
34 {
35 struct io io;
36 char bf[BUFSIZ];
37 int err;
38
39 io.fd = open(filename, O_RDONLY, 0);
40
41 if (io.fd < 0)
42 return -1;
43
44 io__init(&io, io.fd, bf, sizeof(bf));
45
46 err = 0;
47 while (!io.eof) {
48 __u64 start;
49 int ch;
50 size_t i;
51 char symbol_type;
52 char symbol_name[KSYM_NAME_LEN + 1];
53
54 if (io__get_hex(&io, &start) != ' ') {
55 read_to_eol(&io);
56 continue;
57 }
58 symbol_type = io__get_char(&io);
59 if (io__get_char(&io) != ' ') {
60 read_to_eol(&io);
61 continue;
62 }
63 for (i = 0; i < sizeof(symbol_name); i++) {
64 ch = io__get_char(&io);
65 if (ch < 0 || ch == '\n')
66 break;
67 symbol_name[i] = ch;
68 }
69 symbol_name[i] = '\0';
70
71 err = process_symbol(arg, symbol_name, symbol_type, start);
72 if (err)
73 break;
74 }
75
76 close(io.fd);
77 return err;
78 }
79
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