{"id":55,"date":"2026-06-05T06:28:47","date_gmt":"2026-06-05T06:28:47","guid":{"rendered":"https:\/\/www.skillnotes.cloud\/?p=55"},"modified":"2026-06-05T09:30:56","modified_gmt":"2026-06-05T09:30:56","slug":"%e4%bd%bf%e7%94%a8qemu%e8%99%9a%e6%8b%9f%e6%9c%ba%e6%90%ad%e5%bb%ba%e4%b8%80%e4%b8%aalinux%e5%86%85%e6%a0%b8%e5%92%8cglibc%e8%b0%83%e8%af%95%e7%8e%af%e5%a2%83","status":"publish","type":"post","link":"https:\/\/www.skillnotes.cloud\/?p=55","title":{"rendered":"\u4f7f\u7528qemu\u865a\u62df\u673a\u642d\u5efa\u4e00\u4e2aLinux\u5185\u6838\u8c03\u8bd5\u73af\u5883"},"content":{"rendered":"\n<ul class=\"wp-block-list\">\n<li>\u914d\u7f6eLinux\u5185\u6838\u53c2\u6570<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">         \u8c03\u8bd5\u5185\u6838\u9700\u8981\u914d\u7f6edefconfig\u6216.config<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">         defconfig\u6587\u4ef6\u9700\u8981\u653e\u7f6e\u5728\u5185\u6838\u7684receipt\u76ee\u5f55\uff0c\u9700\u8981\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u4f7f\u80fd<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CONFIG_GDB_SCRIPTS=y\n\nCONFIG_DEBUG_INFO_DWARF5=y<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">        \u5728\u914d\u7f6e\u8c03\u8bd5Linux\u5185\u6838\u53c2\u6570\u65f6\u53ef\u4ee5\u4f7f\u7528 bitbake virtual\/kernel -c menuconfig \u4f7f\u7528Linux\u7684menuconfig\u5bf9\u5185\u6838\u53c2\u6570\u8fdb\u884c\u914d\u7f6e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528yocto\u7684\u7f16\u8bd1\u7cfb\u7edf\u5bf9\u5185\u6838\u8fdb\u884c\u7f16\u8bd1<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>bitbake virtual\/kernel<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7f16\u8bd1\u5b8c\u6210\u4e4b\u540e\u5185\u6838\u7f16\u8bd1\u76ee\u5f55\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work\/qemux86_64-oe-linux\/linux-yocto\/7.0\/build\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6b64\u76ee\u5f55\u5185\u6709\u5e26\u6709\u8c03\u8bd5\u4fe1\u606f\u7684 vmlinux<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5185\u6838\u6e90\u4ee3\u7801\u4fdd\u5b58\u5728\u76ee\u5f55<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work-shared\/qemux86-64\/kernel-source\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7f16\u8bd1\u5b8c\u6210\u4e4b\u540e\u8fdb\u5165\u76ee\u5f55<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work\/qemux86_64-oe-linux\/linux-yocto\/7.0\/build\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 <strong><mark style=\"background-color:#686868\" class=\"has-inline-color has-base-color\">make scripts_gdb<\/mark> <\/strong>\u7f16\u8bd1\u8c03\u8bd5\u811a\u672c\uff0c\u5728\u4f7f\u7528gdb\u914d\u5408qemu\u865a\u62df\u673a\u8c03\u8bd5\u5185\u6838\u65f6\u9700\u8981 vmlinux-gdb.py python\u8c03\u8bd5\u811a\u672c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528qemu\u865a\u62df\u673a\u542f\u52a8yocto\u7f16\u8bd1\u7684\u5185\u6838\u548crootfs<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>qemu-system-x86_64 -device virtio-net-pci,netdev=net0,mac=52:54:00:12:34:02 -netdev tap,id=net0,ifname=tap0,script=no,downscript=no -object rng-random,filename=\/dev\/urandom,id=rng0 -device virtio-rng-pci,rng=rng0 -drive file=${yocto\u6839\u76ee\u5f55}\/build\/tmp\/deploy\/images\/qemux86-64\/core-image-minimal-qemux86-64.rootfs.ext4,if=virtio,format=raw -usb -device usb-tablet -usb -device usb-kbd -cpu Skylake-Client -machine q35,i8042=off -smp 4 -m 1024 -vga std -serial mon:stdio -display sdl,show-cursor=on -gdb tcp::2345 -kernel ${yocto\u6839\u76ee\u5f55}\/build\/tmp\/deploy\/images\/qemux86-64\/bzImage -append 'root=\/dev\/vda rw console=tty0 console=ttyS0,115200 ip=192.168.7.2::192.168.7.1:255.255.255.0::eth0:off:8.8.8.8 net.ifnames=0 oprofile.timer=1 tsc=reliable no_timer_check rcupdate.rcu_expedited=1 swiotlb=0 nokaslr'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u547d\u4ee4\u884c\u4e2d\uff0c\u5236\u5b9agdb\u8fdc\u7a0b\u8c03\u8bd5\u63a5\u53e3\u7684\u6307\u4ee4\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-gdb tcp::2345<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u9700debug\u542f\u52a8\uff0c\u53ef\u4ee5\u4f7f\u7528 -S \u6307\u5b9a\u5728\u542f\u52a8\u4e4b\u540e\u505c\u6b62<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u547d\u4ee4\u884c\u4e2d\uff0c\u6307\u5b9a\u5185\u6838\u542f\u52a8\u53c2\u6570\u7684\u6307\u4ee4\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-append 'root=\/dev\/vda rw console=tty0 console=ttyS0,115200 ip=192.168.7.2::192.168.7.1:255.255.255.0::eth0:off:8.8.8.8 net.ifnames=0 oprofile.timer=1 tsc=reliable no_timer_check rcupdate.rcu_expedited=1 swiotlb=0 nokaslr'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u5173\u95edkaslr,\u5373\u5728\u542f\u52a8\u53c2\u6570\u672b\u5c3e\u4f7f\u7528 nokaslr \u7981\u7528\u5185\u6838\u52a0\u8f7d\u5730\u5740\u968f\u673a\u5316\uff0c\u5426\u5219\u5728\u4f7f\u7528GDB\u8c03\u8bd5\u65f6\u9700\u8981\u5148\u4ece\/proc\/kallsymc\u67e5\u8be2\u5230\u5185\u6838\u7684\u504f\u79fb\u5730\u5740\uff0c\u7136\u540e\u518d\u4f7f\u7528\u8c03\u8bd5\u4fee\u6539\u5185\u6838\u8d77\u59cb\u5730\u5740<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528gdb \u8fde\u63a5qemu\u865a\u62df\u673a<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fdb\u5165\u76ee\u5f55<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work\/qemux86_64-oe-linux\/linux-yocto\/7.0\/build\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u547d\u4ee4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>gdb .\/vmlinux<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"> \u6253\u5f00gdb\u8c03\u8bd5\u5668<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728gdb\u754c\u9762\uff0c\u4f7f\u7528\u547d\u4ee4\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">a. \u914d\u7f6e\u53ef\u52a0\u8f7d\u7684\u8def\u5f84<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) add-auto-load-safe-path ${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work-shared\/qemux86-64\/kernel-source<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">b. \u4f7f\u80fdvmlinux-gdb.py\u8c03\u8bd5\u63d2\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) source vmlinux-gdb.py<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c. \u914d\u7f6e\u5f53\u524d\u5185\u6838\u7684\u76ee\u5f55\uff0cgdb\u4f1a\u4ece\/usr\/src\/kernel \u67e5\u627e\u5185\u6838\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) set substitute-path \/usr\/src\/kernel ${yocto\u6839\u76ee\u5f55}\/build\/tmp\/work-shared\/qemux86-64\/kernel-source<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">d. \u8fde\u63a5\u865a\u62df\u673a\u8c03\u8bd5\u5668<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) target remote :2345<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">e. \u52a0\u8f7d\u5185\u6838\u7b26\u53f7\u8868<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) lx-symbols<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u672a\u5173\u95edkaslr\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u91cd\u65b0\u5b9a\u5411\u5185\u6838\u7684\u7b26\u53f7\u4f4d\u7f6e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u672a\u5173\u95edkaslr\uff0c\u5185\u6838\u4f1a\u542f\u7528\u5185\u6838\u52a0\u8f7d\u5730\u5740\u968f\u673a\u5316\uff0c\u91cd\u65b0\u5b9a\u4f4d\u5185\u6838\u7b26\u53f7\u7684\u504f\u79fb<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\/proc\/kallsyms \u67e5\u627e\u5185\u6838\u7b26\u53f7\u7684\u5b9e\u9645\u5185\u5b58\u4f4d\u7f6e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cat \/proc\/kallsyms\n\nffffffffadc00000 T _stext\n\nffffffffadc00000 T _text\n\nffffffffadc00000 T __pi__text\n\n......<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u5185\u6838\u7684.text\u6bb5\u91cd\u65b0\u5b9a\u4f4d\u5230\u65b0\u7684\u504f\u79fb\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528vmlinux\u4e2d\u5b9a\u4e49\u7684\u504f\u79fb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(gdb) add-symbol-file vmlinux 0xffffffffadc00000<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8c03\u8bd5\u5185\u6838\u9700\u8981\u914d\u7f6edefconfig\u6216.config defconfig\u6587\u4ef6\u9700\u8981\u653e\u7f6e\u5728\u5185\u6838\u7684receipt\u76ee\u5f55\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-55","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/55","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=55"}],"version-history":[{"count":7,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/55\/revisions"}],"predecessor-version":[{"id":82,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=\/wp\/v2\/posts\/55\/revisions\/82"}],"wp:attachment":[{"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=55"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=55"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skillnotes.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=55"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}