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