LLVM and SPIRV-LLVM-Translator pulldown (WW52 2025)

bolt/README.md

@@ -202,6 +202,26 @@ $ merge-fdata *.fdata > combined.fdata
 Use `combined.fdata` for **Step 3** above to generate a universally optimized
 binary.
 
+## Identifying a Binary Modified By BOLT
+
+A binary that has been modified by BOLT will include a `bolt_info` note and may
+have extra sections with `bolt` in their name.
+
+You can use `readelf` to find these:
+```
+$ readelf -S <your-binary> | grep bolt
+  [11] .bolt.org.eh_frame PROGBITS <...>
+<...>
+  [39] .note.bolt_info   NOTE <...>
+```
+The note can be displayed with:
+```
+$ readelf -p .note.bolt_info <your-binary>
+String dump of section '.note.bolt_info':
+  <...>
+  [    10]  BOLT revision: <...>
+```
+
 ## License
 
 BOLT is licensed under the [Apache License v2.0 with LLVM Exceptions](./LICENSE.TXT).

bolt/docs/BAT.md

@@ -61,6 +61,7 @@ Functions table:
 
 ### Functions table
 Hot and cold functions tables share the encoding except differences marked below.
+
 Header:
 | Entry  | Encoding | Description |
 | ------ | ----- | ----------- |

bolt/docs/CommandLineArgumentReference.md

@@ -811,6 +811,15 @@
 
   Specify file name of the runtime instrumentation library
 
+- `--runtime-lib-init-hook=<value>`
+
+  Primary target for hooking runtime library initialization, used in
+  fallback order of availability in input binary (entry_point -> init
+   -> init_array) (default: entry_point)
+  - `entry_point`: use ELF Header Entry Point
+  - `init`: use ELF DT_INIT entry
+  - `init_array`: use ELF .init_array entry
+
 - `--sctc-mode=<value>`
 
   Mode for simplify conditional tail calls