设置Linux KERN_DIR 环境变量

本文介绍如何在Linux系统中配置内核编译环境,包括设置必要的环境变量以指向正确的内核源代码目录。针对不同版本的Fedora、CentOS及Red Hat系统提供了具体的配置指令。

1. 打开 /etc/profile

vi /etc/profile


2. 根据不同系统选择下面的环境变量

## Current running kernel on Fedora, CentOS 6 and Red Hat (RHEL) 6 ##
KERN_DIR=/usr/src/kernels/`uname -r`
 
## Current running kernel on CentOS 5 and Red Hat (RHEL) 5 ##
KERN_DIR=/usr/src/kernels/`uname -r`-`uname -m`
 
## Fedora example ##
KERN_DIR=/usr/src/kernels/2.6.33.5-124.fc13.i686
 
## CentOS and Red Hat (RHEL) example ##
KERN_DIR=/usr/src/kernels/2.6.18-194.11.1.el5-x86_64
 
## Export KERN_DIR ##
export KERN_DIR

# # Copyright (C) 2006-2010 OpenWrt.org # # This is free software, licensed under the GNU General Public License v2. # See /LICENSE for more information. # curdir:=package include $(INCLUDE_DIR)/feeds.mk include $(INCLUDE_DIR)/rootfs.mk -include $(TMP_DIR)/.packagedeps package-y += kernel/linux $(curdir)/autoremove:=1 $(curdir)/builddirs:=$(sort $(package-) $(package-y) $(package-m)) $(curdir)/builddirs-default:=. $(sort $(package-y) $(package-m)) $(curdir)/builddirs-prereq:=. $(sort $(prereq-y) $(prereq-m)) ifdef CHECK_ALL $(curdir)/builddirs-check:=$($(curdir)/builddirs) $(curdir)/builddirs-download:=$($(curdir)/builddirs) endif ifneq ($(IGNORE_ERRORS),) package-y-filter := $(package-y) package-m-filter := $(filter-out $(package-y),$(package-m)) package-n-filter := $(filter-out $(package-y) $(package-m),$(package-)) package-ignore-errors := $(filter n m y,$(IGNORE_ERRORS)) package-ignore-errors := $(if $(package-ignore-errors),$(package-ignore-errors),n m) package-ignore-subdirs := $(sort $(foreach m,$(package-ignore-errors),$(package-$(m)-filter))) $(curdir)/builddirs-ignore-download := $(package-ignore-subdirs) $(curdir)/builddirs-ignore-compile := $(package-ignore-subdirs) $(curdir)/builddirs-ignore-host-download := $(package-ignore-subdirs) $(curdir)/builddirs-ignore-host-compile := $(package-ignore-subdirs) endif PACKAGE_INSTALL_FILES:= \ $(foreach pkg,$(sort $(package-y)), \ $(foreach variant, \ $(if $(strip $(package/$(pkg)/variants)), \ $(package/$(pkg)/variants), \ $(if $(package/$(pkg)/default-variant), \ $(package/$(pkg)/default-variant), \ default \ ) \ ), \ $(PKG_INFO_DIR)/$(lastword $(subst /,$(space),$(pkg))).$(variant).install \ ) \ ) $(curdir)/cleanup: $(TMP_DIR)/.build rm -rf $(STAGING_DIR_ROOT) $(curdir)/merge: rm -rf $(PACKAGE_DIR_ALL) mkdir -p $(PACKAGE_DIR_ALL) ifneq ($(CONFIG_USE_APK),) -$(foreach pdir,$(PACKAGE_SUBDIRS),$(if $(wildcard $(pdir)/*.apk),ln -s $(pdir)/*.apk $(PACKAGE_DIR_ALL);)) else -$(foreach pdir,$(PACKAGE_SUBDIRS),$(if $(wildcard $(pdir)/*.ipk),ln -s $(pdir)/*.ipk $(PACKAGE_DIR_ALL);)) endif $(BUILD_KEY_APK_SEC): $(STAGING_DIR_HOST)/bin/openssl ecparam -name prime256v1 -genkey -noout -out $(BUILD_KEY_APK_SEC) $(BUILD_KEY_APK_PUB): $(BUILD_KEY_APK_SEC) $(STAGING_DIR_HOST)/bin/openssl ec -in $(BUILD_KEY_APK_SEC) -pubout > $(BUILD_KEY_APK_PUB) $(curdir)/merge-index: $(curdir)/merge ifneq ($(CONFIG_USE_APK),) (cd $(PACKAGE_DIR_ALL) && $(STAGING_DIR_HOST)/bin/apk mkndx \ --root $(TOPDIR) \ --keys-dir $(TOPDIR) \ --allow-untrusted \ $(if $(CONFIG_SIGNED_PACKAGES),--sign $(BUILD_KEY_APK_SEC),) \ --output packages.adb \ *.apk; \ ) else (cd $(PACKAGE_DIR_ALL) && $(SCRIPT_DIR)/ipkg-make-index.sh . 2>&1 > Packages; ) endif ifndef SDK $(curdir)//compile = $(STAGING_DIR)/.prepared $(BIN_DIR) ifneq ($(CONFIG_USE_APK),) $(curdir)//compile += $(curdir)/system/apk/host/compile $(BUILD_KEY_APK_SEC) $(BUILD_KEY_APK_PUB) else $(curdir)/compile: $(curdir)/system/opkg/host/compile endif else ifneq ($(CONFIG_USE_APK),) $(curdir)//compile += $(BUILD_KEY_APK_SEC) $(BUILD_KEY_APK_PUB) endif endif $(curdir)/install: $(TMP_DIR)/.build $(curdir)/merge $(curdir)/merge-index - find $(STAGING_DIR_ROOT) -type d | $(XARGS) chmod 0755 rm -rf $(TARGET_DIR) $(TARGET_DIR_ORIG) mkdir -p $(TARGET_DIR)/tmp ifneq ($(CONFIG_USE_APK),) $(file >$(TMP_DIR)/apk_install_list,\ $(foreach pkg,$(shell cat $(PACKAGE_INSTALL_FILES) 2>/dev/null),$(pkg)$(call GetABISuffix,$(pkg)))) $(call apk,$(TARGET_DIR)) add --no-cache --initdb --no-scripts --arch $(ARCH_PACKAGES) \ --repositories-file /dev/null --repository file://$(PACKAGE_DIR_ALL)/packages.adb \ $(if $(CONFIG_SIGNED_PACKAGES),,--allow-untrusted) \ $$(cat $(TMP_DIR)/apk_install_list) \ "base-files=$(shell cat $(TMP_DIR)/base-files.version)" \ "libc=$(shell cat $(TMP_DIR)/libc.version)" \ "kernel=$(shell cat $(TMP_DIR)/kernel.version)" rm -rf $(TARGET_DIR)/run else $(file >$(TMP_DIR)/opkg_install_list,\ $(call opkg_package_files,\ $(foreach pkg,$(shell cat $(PACKAGE_INSTALL_FILES) 2>/dev/null),$(pkg)$(call GetABISuffix,$(pkg))))) $(call opkg,$(TARGET_DIR)) install $$(cat $(TMP_DIR)/opkg_install_list) @for file in $(PACKAGE_INSTALL_FILES); do \ [ -s $$file.flags ] || continue; \ for flag in `cat $$file.flags`; do \ $(call opkg,$(TARGET_DIR)) flag $$flag `cat $$file`; \ done; \ done || true endif $(CP) $(TARGET_DIR) $(TARGET_DIR_ORIG) $(call prepare_rootfs,$(TARGET_DIR),$(TOPDIR)/files) $(curdir)/index: FORCE @echo Generating package index... ifneq ($(CONFIG_USE_APK),) @for d in $(PACKAGE_SUBDIRS); do \ mkdir -p $$d; \ cd $$d || continue; \ ls *.apk >/dev/null 2>&1 || continue; \ $(STAGING_DIR_HOST)/bin/apk mkndx \ --root $(TOPDIR) \ --keys-dir $(TOPDIR) \ --allow-untrusted \ $(if $(CONFIG_SIGNED_PACKAGES),--sign $(BUILD_KEY_APK_SEC),) \ --output packages.adb \ *.apk; \ $(STAGING_DIR_HOST)/bin/apk adbdump --format json packages.adb | \ $(SCRIPT_DIR)/make-index-json.py -f apk -a "$(ARCH_PACKAGES)" - > index.json; \ done else @for d in $(PACKAGE_SUBDIRS); do ( \ mkdir -p $$d; \ cd $$d || continue; \ $(SCRIPT_DIR)/ipkg-make-index.sh . 2>&1 > Packages.manifest; \ grep -vE '^(Maintainer|LicenseFiles|Source|SourceName|Require|SourceDateEpoch)' Packages.manifest > Packages; \ case "$$(((64 + $$(stat -L -c%s Packages)) % 128))" in 110|111) \ $(call ERROR_MESSAGE,WARNING: Applying padding in $$d/Packages to workaround usign SHA-512 bug!); \ { echo ""; echo ""; } >> Packages;; \ esac; \ $(SCRIPT_DIR)/make-index-json.py -f opkg -a "$(ARCH_PACKAGES)" Packages > index.json; \ gzip -9nc Packages > Packages.gz; \ ); done ifdef CONFIG_SIGNED_PACKAGES @echo Signing package index... @for d in $(PACKAGE_SUBDIRS); do ( \ [ -d $$d ] && \ cd $$d || continue; \ $(STAGING_DIR_HOST)/bin/usign -S -m Packages -s $(BUILD_KEY); \ ); done endif ifdef CONFIG_JSON_CYCLONEDX_SBOM @echo Creating CycloneDX package SBOMs... @for d in $(PACKAGE_SUBDIRS); do ( \ [ -d $$d ] && \ cd $$d || continue; \ $(SCRIPT_DIR)/package-metadata.pl pkgcyclonedxsbom Packages.manifest > Packages.bom.cdx.json || true; \ ); done endif endif $(call sha256sums,$(OUTPUT_DIR)/packages/$(ARCH_PACKAGES),1) $(curdir)/flags-install:= -j1 $(eval $(call stampfile,$(curdir),package,prereq,.config)) $(eval $(call stampfile,$(curdir),package,cleanup,$(TMP_DIR)/.build)) $(eval $(call stampfile,$(curdir),package,compile,$(TMP_DIR)/.build)) $(eval $(call stampfile,$(curdir),package,install,$(TMP_DIR)/.build)) $(eval $(call stampfile,$(curdir),package,check,$(TMP_DIR)/.build)) $(eval $(call subdir,$(curdir))) 内核是我自己的本地版本,现在想要强制install,怎么处理
最新发布
12-25
#include <linux/module.h> #include <linux/kernel.h> #include <linux/proc_fs.h> #include <linux/fs.h> #include <linux/blkdev.h> #include <linux/bio.h> #include <linux/random.h> #include <linux/version.h> #include <linux/slab.h> #define DEV_NAME "sda1" // 目标设备 #define START_BYTE (562 * 1024 * 1024) // 起始字节 #define END_BYTE (818 * 1024 * 1024) // 结束字节 static struct gendisk *target_disk; static int trigger_enabled = 0; static unsigned long error_count = 0; static struct proc_dir_entry *trigger_proc; // 原始make_request_fn函数 static blk_qc_t (*orig_make_request)(struct request_queue *q, struct bio *bio); // 处理/proc/trigger_io写入 static ssize_t trigger_io_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { char cmd[32]; if (copy_from_user(cmd, buf, min(count, sizeof(cmd)-1))) return -EFAULT; cmd[min(count, sizeof(cmd)-1)] = '\0'; // 解析命令 if (strcmp(cmd, "enable") == 0 || strcmp(cmd, "1") == 0) { trigger_enabled = 1; printk(KERN_INFO "I/O error trigger ENABLED\n"); } else if (strcmp(cmd, "disable") == 0 || strcmp(cmd, "0") == 0) { trigger_enabled = 0; printk(KERN_INFO "I/O error trigger DISABLED\n"); } else if (strcmp(cmd, "reset") == 0) { error_count = 0; printk(KERN_INFO "Error counter reset\n"); } else { printk(KERN_WARNING "Unknown command: %s\n", cmd); return -EINVAL; } return count; } // 处理/proc/trigger_io读取 static ssize_t trigger_io_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { char status[128]; int len; len = snprintf(status, sizeof(status), "Status: %s\nError count: %lu\nTarget device: %s\nRange: %uMB-%uMB\n", trigger_enabled ? "ENABLED" : "DISABLED", error_count, DEV_NAME, START_BYTE/(1024*1024), END_BYTE/(1024*1024)); return simple_read_from_buffer(buf, count, ppos, status, len); } static const struct proc_ops trigger_io_fops = { .proc_read = trigger_io_read, .proc_write = trigger_io_write, }; // 拦截块设备I/O请求 static blk_qc_t modified_make_request(struct request_queue *q, struct bio *bio) { if (trigger_enabled && bio->bi_disk == target_disk) { sector_t sector = bio->bi_iter.bi_sector; unsigned long byte_offset = sector * 512; // 检查是否在目标范围 if (byte_offset >= START_BYTE && byte_offset <= END_BYTE) { // 50%概率触发错误 if (get_random_u32() % 2 == 0) { printk(KERN_INFO "Injecting I/O error at sector %lu\n", (u64)sector); bio->bi_status = BLK_STS_IOERR; bio_endio(bio); error_count++; return BLK_QC_T_NONE; } } } return orig_make_request(q, bio); } static int __init trigger_io_init(void) { // 查找目标设备 struct block_device *bdev = blkdev_get_by_dev(MKDEV(8, 1), FMODE_READ, NULL, NULL); struct gendisk *target_disk = bdev->bd_disk; if (!target_disk) { printk(KERN_ERR "Failed to find %s\n", DEV_NAME); return -ENODEV; } // 保存原始请求函数并替换 orig_make_request = target_disk->queue->make_request_fn; target_disk->queue->make_request_fn = modified_make_request; // 创建/proc/trigger_io文件 trigger_proc = proc_create("trigger_io", 0644, NULL, &trigger_io_fops); if (!trigger_proc) { printk(KERN_ERR "Failed to create /proc/trigger_io\n"); return -ENOMEM; } printk(KERN_INFO "I/O trigger module loaded for %s\n", DEV_NAME); return 0; } static void __exit trigger_io_exit(void) { // 恢复原始请求函数 if (target_disk) { target_disk->queue->make_request_fn = orig_make_request; put_disk(target_disk); } // 移除/proc文件 if (trigger_proc) proc_remove(trigger_proc); printk(KERN_INFO "I/O trigger module unloaded\n"); } module_init(trigger_io_init); module_exit(trigger_io_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Your Name"); MODULE_DESCRIPTION("Controlled I/O error trigger"); 这是k_trigger_io.c代码,你先记着有些编译错误我一个一个问你
08-08
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