machine.c (1104B)
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}