diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2025-03-27 19:26:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-03-27 19:26:10 -0700 |
| commit | dcf9f31c62b3d31c033ee5bce522855c3d7f56b1 (patch) | |
| tree | 213e4ba3dcb9a6d0943036d1f37b800946b45e59 /Documentation | |
| parent | 96050814a3f667eb28dabb78e7b3a7b06e5243e9 (diff) | |
| parent | d11f0d172a3c2ea9cbe9b07abd47d5b767600ad9 (diff) | |
Merge tag 'livepatching-for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching
Pull livepatching updates from Petr Mladek:
- Add a selftest for tracing of a livepatched function
- Skip a selftest when kprobes are not using ftrace
- Some documentation clean up
* tag 'livepatching-for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching:
selftests: livepatch: test if ftrace can trace a livepatched function
selftests: livepatch: add new ftrace helpers functions
selftest/livepatch: Only run test-kprobe with CONFIG_KPROBES_ON_FTRACE
docs: livepatch: move text out of code block
livepatch: Add comment to clarify klp_add_nops()
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/livepatch/module-elf-format.rst | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/Documentation/livepatch/module-elf-format.rst b/Documentation/livepatch/module-elf-format.rst index a03ed02ec57e..5d48778d4dfc 100644 --- a/Documentation/livepatch/module-elf-format.rst +++ b/Documentation/livepatch/module-elf-format.rst @@ -217,16 +217,19 @@ livepatch relocation section refer to their respective symbols with their symbol indices, and the original symbol indices (and thus the symtab ordering) must be preserved in order for apply_relocate_add() to find the right symbol. -For example, take this particular rela from a livepatch module::: +For example, take this particular rela from a livepatch module:: Relocation section '.klp.rela.btrfs.text.btrfs_feature_attr_show' at offset 0x2ba0 contains 4 entries: Offset Info Type Symbol's Value Symbol's Name + Addend 000000000000001f 0000005e00000002 R_X86_64_PC32 0000000000000000 .klp.sym.vmlinux.printk,0 - 4 - This rela refers to the symbol '.klp.sym.vmlinux.printk,0', and the symbol index is encoded - in 'Info'. Here its symbol index is 0x5e, which is 94 in decimal, which refers to the - symbol index 94. - And in this patch module's corresponding symbol table, symbol index 94 refers to that very symbol: +This rela refers to the symbol '.klp.sym.vmlinux.printk,0', and the symbol +index is encoded in 'Info'. Here its symbol index is 0x5e, which is 94 in +decimal, which refers to the symbol index 94. + +And in this patch module's corresponding symbol table, symbol index 94 refers +to that very symbol:: + [ snip ] 94: 0000000000000000 0 NOTYPE GLOBAL DEFAULT OS [0xff20] .klp.sym.vmlinux.printk,0 [ snip ] |