1// SPDX-License-Identifier: GPL-2.0
2#include <inttypes.h>
3#include <unistd.h>
4#include <stdio.h>
5#include <string.h>
6#include <internal/lib.h> // page_size
7#include "machine.h"
8#include "api/fs/fs.h"
9#include "debug.h"
10#include "symbol.h"
11
12int arch__fix_module_text_start(u64 *start, u64 *size, const char *name)
13{
14	u64 m_start = *start;
15	char path[PATH_MAX];
16
17	snprintf(path, PATH_MAX, "module/%.*s/sections/.text",
18				(int)strlen(name) - 2, name + 1);
19	if (sysfs__read_ull(path, (unsigned long long *)start) < 0) {
20		pr_debug2("Using module %s start:%#lx\n", path, m_start);
21		*start = m_start;
22	} else {
23		/* Successful read of the modules segment text start address.
24		 * Calculate difference between module start address
25		 * in memory and module text segment start address.
26		 * For example module load address is 0x3ff8011b000
27		 * (from /proc/modules) and module text segment start
28		 * address is 0x3ff8011b870 (from file above).
29		 *
30		 * Adjust the module size and subtract the GOT table
31		 * size located at the beginning of the module.
32		 */
33		*size -= (*start - m_start);
34	}
35
36	return 0;
37}
38