linux-rng/tools/objtool/include, branch master

objtool: Add wide output for disassembly

2025-11-24T19:40:48Z

Add the --wide option to provide a wide output when disassembling. With this option, the disassembly of alternatives is displayed side-by-side instead of one above the other. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-30-alexandre.chartre@oracle.com

objtool: Add Function to get the name of a CPU feature

2025-11-24T19:39:47Z

Add a function to get the name of a CPU feature. The function is architecture dependent and currently only implemented for x86. The feature names are automatically generated from the cpufeatures.h include file. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-27-alexandre.chartre@oracle.com

objtool: Provide access to feature and flags of group alternatives

2025-11-21T14:30:14Z

Each alternative of a group alternative depends on a specific feature and flags. Provide access to the feature/flags for each alternative as an attribute (feature) in struct alt_group. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-26-alexandre.chartre@oracle.com

objtool: Add the --disas= action

2025-11-21T14:30:12Z

Add the --disas= actions to disassemble the specified functions. The function pattern can be a single function name (e.g. --disas foo to disassemble the function with the name "foo"), or a shell wildcard pattern (e.g. --disas foo* to disassemble all functions with a name starting with "foo"). Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-18-alexandre.chartre@oracle.com

objtool: Improve tracing of alternative instructions

2025-11-21T14:30:11Z

When tracing function validation, improve the reporting of alternative instruction by more clearly showing the different alternatives beginning and end. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-16-alexandre.chartre@oracle.com

objtool: Add functions to better name alternatives

2025-11-21T14:30:11Z

Add the disas_alt_name() and disas_alt_type_name() to provide a name and a type name for an alternative. This will be used to better name alternatives when tracing their execution. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-15-alexandre.chartre@oracle.com

objtool: Identify the different types of alternatives

2025-11-21T14:30:11Z

Alternative code, including jump table and exception table, is represented with the same struct alternative structure. But there is no obvious way to identify whether the struct represents alternative instructions, a jump table or an exception table. So add a type to struct alternative to clearly identify the type of alternative. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-14-alexandre.chartre@oracle.com

objtool: Improve register reporting during function validation

2025-11-21T14:30:10Z

When tracing function validation, instruction state changes can report changes involving registers. These registers are reported with the name "r" (e.g. "r3"). Print the CPU specific register name instead of a generic name (e.g. print "rbx" instead of "r3" on x86). Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-13-alexandre.chartre@oracle.com

objtool: Trace instruction state changes during function validation

2025-11-21T14:30:10Z

During function validation, objtool maintains a per-instruction state, in particular to track call frame information. When tracing validation, print any instruction state changes. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-12-alexandre.chartre@oracle.com

objtool: Add option to trace function validation

2025-11-21T14:30:09Z

Add an option to trace and have information during the validation of specified functions. Functions are specified with the --trace option which can be a single function name (e.g. --trace foo to trace the function with the name "foo"), or a shell wildcard pattern (e.g. --trace foo* to trace all functions with a name starting with "foo"). Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-11-alexandre.chartre@oracle.com