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
 8u8 kallsyms2elf_type(char type)
 9{
10	type = tolower(type);
11	return (type == 't' || type == 'w') ? STT_FUNC : STT_OBJECT;
12}
13
14bool kallsyms__is_function(char symbol_type)
15{
16	symbol_type = toupper(symbol_type);
17	return symbol_type == 'T' || symbol_type == 'W';
18}
19
20static 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
31int 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}

 
 1#include "symbol/kallsyms.h"
 
 2#include <stdio.h>
 3#include <stdlib.h>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 4
 5int kallsyms__parse(const char *filename, void *arg,
 6		    int (*process_symbol)(void *arg, const char *name,
 7					  char type, u64 start))
 8{
 9	char *line = NULL;
10	size_t n;
11	int err = -1;
12	FILE *file = fopen(filename, "r");
 
13
14	if (file == NULL)
15		goto out_failure;
 
 
16
17	err = 0;
18
19	while (!feof(file)) {
20		u64 start;
21		int line_len, len;
22		char symbol_type;
23		char *symbol_name;
24
25		line_len = getline(&line, &n, file);
26		if (line_len < 0 || !line)
27			break;
28
29		line[--line_len] = '\0'; /* \n */
30
31		len = hex2u64(line, &start);
32
33		len++;
34		if (len + 2 >= line_len)
35			continue;
36
37		symbol_type = line[len];
38		len += 2;
39		symbol_name = line + len;
40		len = line_len - len;
41
42		if (len >= KSYM_NAME_LEN) {
43			err = -1;
44			break;
45		}
 
 
 
 
 
 
 
46
47		err = process_symbol(arg, symbol_name, symbol_type, start);
48		if (err)
49			break;
50	}
51
52	free(line);
53	fclose(file);
54	return err;
55
56out_failure:
57	return -1;
58}