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diff --git a/docs/ELF_PACKAGE_METADATA.md b/docs/ELF_PACKAGE_METADATA.md index 2b58cf1380..5415441cfb 100644 --- a/docs/ELF_PACKAGE_METADATA.md +++ b/docs/ELF_PACKAGE_METADATA.md @@ -103,3 +103,97 @@ A set of well-known keys is defined here, and hopefully shared among all vendors | architecture | The binary package architecture | arm32 | | osCpe | A CPE name for the OS, typically corresponding to CPE_NAME in os-release | cpe:/o:fedoraproject:fedora:33 | | debugInfoUrl | The debuginfod server url, if available | https://debuginfod.fedoraproject.org/ | + +### Displaying package notes + +The raw ELF section can be extracted using `objdump`: +```console +$ objdump -j .note.package -s /usr/bin/ls + +/usr/bin/ls: file format elf64-x86-64 + +Contents of section .note.package: + 03cc 04000000 7c000000 7e1afeca 46444f00 ....|...~...FDO. + 03dc 7b227479 7065223a 2272706d 222c226e {"type":"rpm","n + 03ec 616d6522 3a22636f 72657574 696c7322 ame":"coreutils" + 03fc 2c227665 7273696f 6e223a22 392e342d ,"version":"9.4- + 040c 372e6663 3430222c 22617263 68697465 7.fc40","archite + 041c 63747572 65223a22 7838365f 3634222c cture":"x86_64", + 042c 226f7343 7065223a 22637065 3a2f6f3a "osCpe":"cpe:/o: + 043c 6665646f 72617072 6f6a6563 743a6665 fedoraproject:fe + 044c 646f7261 3a343022 7d000000 dora:40"}... +``` + +It is more convenient to use a higher level tool: +```console +$ readelf --notes /usr/bin/ls +... +Displaying notes found in: .note.gnu.build-id + Owner Data size Description + GNU 0x00000014 NT_GNU_BUILD_ID (unique build ID bitstring) + Build ID: 40e5a1570a9d97fc48f5c61cfb7690fec0f872b2 + +Displaying notes found in: .note.ABI-tag + Owner Data size Description + GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag) + OS: Linux, ABI: 3.2.0 + +Displaying notes found in: .note.package + Owner Data size Description + FDO 0x0000007c FDO_PACKAGING_METADATA + Packaging Metadata: {"type":"rpm","name":"coreutils","version":"9.4-7.fc40","architecture":"x86_64","osCpe":"cpe:/o:fedoraproject:fedora:40"} +... + +$ systemd-analyze inspect-elf /usr/bin/ls + path: /usr/bin/ls + elfType: executable +elfArchitecture: AMD x86-64 + + type: rpm + name: coreutils + version: 9.4-7.fc40 + architecture: x86_64 + osCpe: cpe:/o:fedoraproject:fedora:40 + buildId: 40e5a1570a9d97fc48f5c61cfb7690fec0f872b2 +``` + +If the binary crashes, `systemd-coredump` will display the combined information +from the crashing binary and any shared libraries it links to: + +```console +$ coredumpctl info + PID: 3987823 (ls) + Signal: 11 (SEGV) + Command Line: ls --color=tty -lR / + Executable: /usr/bin/ls +... + Storage: /var/lib/systemd/coredump/core.ls.1000.88dea1b9831c420dbb398f9d2ad9b41e.3987823.1726230641000000.zst (present) + Size on Disk: 194.4K + Package: coreutils/9.4-7.fc40 + build-id: 40e5a1570a9d97fc48f5c61cfb7690fec0f872b2 + Message: Process 3987823 (ls) of user 1000 dumped core. + + Module /usr/bin/ls from rpm coreutils-9.4-7.fc40.x86_64 + Module libz.so.1 from rpm zlib-ng-2.1.7-1.fc40.x86_64 + Module libcrypto.so.3 from rpm openssl-3.2.2-3.fc40.x86_64 + Module libmount.so.1 from rpm util-linux-2.40.1-1.fc40.x86_64 + Module libcrypt.so.2 from rpm libxcrypt-4.4.36-5.fc40.x86_64 + Module libblkid.so.1 from rpm util-linux-2.40.1-1.fc40.x86_64 + Module libnss_sss.so.2 from rpm sssd-2.9.5-1.fc40.x86_64 + Module libpcre2-8.so.0 from rpm pcre2-10.44-1.fc40.x86_64 + Module libcap.so.2 from rpm libcap-2.69-8.fc40.x86_64 + Module libselinux.so.1 from rpm libselinux-3.6-4.fc40.x86_64 + Stack trace of thread 3987823: + #0 0x00007f19331c3f7e lgetxattr (libc.so.6 + 0x116f7e) + #1 0x00007f19332be4c0 lgetfilecon_raw (libselinux.so.1 + 0x134c0) + #2 0x00007f19332c3bd9 lgetfilecon (libselinux.so.1 + 0x18bd9) + #3 0x000056038273ad55 gobble_file.constprop.0 (/usr/bin/ls + 0x17d55) + #4 0x0000560382733c55 print_dir (/usr/bin/ls + 0x10c55) + #5 0x0000560382727c35 main (/usr/bin/ls + 0x4c35) + #6 0x00007f19330d7088 __libc_start_call_main (libc.so.6 + 0x2a088) + #7 0x00007f19330d714b __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2a14b) + #8 0x0000560382728f15 _start (/usr/bin/ls + 0x5f15) + ELF object binary architecture: AMD x86-64 +``` + +(This is just a simulation. `ls` is not prone to crashing with a segmentation violation.) |