162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci#include <inttypes.h> 362306a36Sopenharmony_ci#include <unistd.h> 462306a36Sopenharmony_ci#include <stdio.h> 562306a36Sopenharmony_ci#include <string.h> 662306a36Sopenharmony_ci#include <internal/lib.h> // page_size 762306a36Sopenharmony_ci#include "machine.h" 862306a36Sopenharmony_ci#include "api/fs/fs.h" 962306a36Sopenharmony_ci#include "debug.h" 1062306a36Sopenharmony_ci#include "symbol.h" 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ciint arch__fix_module_text_start(u64 *start, u64 *size, const char *name) 1362306a36Sopenharmony_ci{ 1462306a36Sopenharmony_ci u64 m_start = *start; 1562306a36Sopenharmony_ci char path[PATH_MAX]; 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci snprintf(path, PATH_MAX, "module/%.*s/sections/.text", 1862306a36Sopenharmony_ci (int)strlen(name) - 2, name + 1); 1962306a36Sopenharmony_ci if (sysfs__read_ull(path, (unsigned long long *)start) < 0) { 2062306a36Sopenharmony_ci pr_debug2("Using module %s start:%#lx\n", path, m_start); 2162306a36Sopenharmony_ci *start = m_start; 2262306a36Sopenharmony_ci } else { 2362306a36Sopenharmony_ci /* Successful read of the modules segment text start address. 2462306a36Sopenharmony_ci * Calculate difference between module start address 2562306a36Sopenharmony_ci * in memory and module text segment start address. 2662306a36Sopenharmony_ci * For example module load address is 0x3ff8011b000 2762306a36Sopenharmony_ci * (from /proc/modules) and module text segment start 2862306a36Sopenharmony_ci * address is 0x3ff8011b870 (from file above). 2962306a36Sopenharmony_ci * 3062306a36Sopenharmony_ci * Adjust the module size and subtract the GOT table 3162306a36Sopenharmony_ci * size located at the beginning of the module. 3262306a36Sopenharmony_ci */ 3362306a36Sopenharmony_ci *size -= (*start - m_start); 3462306a36Sopenharmony_ci } 3562306a36Sopenharmony_ci 3662306a36Sopenharmony_ci return 0; 3762306a36Sopenharmony_ci} 38