xref: /openbmc/linux/tools/lib/symbol/kallsyms.c (revision bdeeed09)
1 // SPDX-License-Identifier: GPL-2.0
2 #include <ctype.h>
3 #include "symbol/kallsyms.h"
4 #include <stdio.h>
5 #include <stdlib.h>
6 
7 u8 kallsyms2elf_type(char type)
8 {
9 	type = tolower(type);
10 	return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
11 }
12 
13 int kallsyms__parse(const char *filename, void *arg,
14 		    int (*process_symbol)(void *arg, const char *name,
15 					  char type, u64 start))
16 {
17 	char *line = NULL;
18 	size_t n;
19 	int err = -1;
20 	FILE *file = fopen(filename, "r");
21 
22 	if (file == NULL)
23 		goto out_failure;
24 
25 	err = 0;
26 
27 	while (!feof(file)) {
28 		u64 start;
29 		int line_len, len;
30 		char symbol_type;
31 		char *symbol_name;
32 
33 		line_len = getline(&line, &n, file);
34 		if (line_len < 0 || !line)
35 			break;
36 
37 		line[--line_len] = '\0'; /* \n */
38 
39 		len = hex2u64(line, &start);
40 
41 		/* Skip the line if we failed to parse the address. */
42 		if (!len)
43 			continue;
44 
45 		len++;
46 		if (len + 2 >= line_len)
47 			continue;
48 
49 		symbol_type = line[len];
50 		len += 2;
51 		symbol_name = line + len;
52 		len = line_len - len;
53 
54 		if (len >= KSYM_NAME_LEN) {
55 			err = -1;
56 			break;
57 		}
58 
59 		err = process_symbol(arg, symbol_name, symbol_type, start);
60 		if (err)
61 			break;
62 	}
63 
64 	free(line);
65 	fclose(file);
66 	return err;
67 
68 out_failure:
69 	return -1;
70 }
71