kernel/linux.git/tools/objtool/arch/loongarch, branch v6.19.11

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

2025-11-24T19:39:47+00:00

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: Improve register reporting during function validation

2025-11-21T14:30:10+00:00

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: Disassemble code with libopcodes instead of running objdump

2025-11-21T14:30:07+00:00

objtool executes the objdump command to disassemble code. Use libopcodes instead to have more control about the disassembly scope and output. If libopcodes is not present then objtool is built without disassembly support. Signed-off-by: Alexandre Chartre Signed-off-by: Peter Zijlstra (Intel) Acked-by: Josh Poimboeuf Link: https://patch.msgid.link/20251121095340.464045-4-alexandre.chartre@oracle.com

objtool: Add annotype() helper

2025-10-14T21:46:49+00:00

... for reading annotation types. Acked-by: Petr Mladek Tested-by: Joe Lawrence Signed-off-by: Josh Poimboeuf

objtool: Const string cleanup

2025-10-14T21:45:24+00:00

Use 'const char *' where applicable. Acked-by: Petr Mladek Tested-by: Joe Lawrence Signed-off-by: Josh Poimboeuf

objtool: Fix x86 addend calculation

2025-10-14T21:45:24+00:00

On x86, arch_dest_reloc_offset() hardcodes the addend adjustment to four, but the actual adjustment depends on the relocation type. Fix that. Acked-by: Petr Mladek Tested-by: Joe Lawrence Signed-off-by: Josh Poimboeuf

objtool/LoongArch: Mark special atomic instruction as INSN_BUG type

2025-09-18T11:43:36+00:00

When compiling with LLVM and CONFIG_RUST is set, there exists the following objtool warning: rust/compiler_builtins.o: warning: objtool: __rust__unordsf2(): unexpected end of section .text.unlikely. objdump shows that the end of section .text.unlikely is an atomic instruction: amswap.w $zero, $ra, $zero According to the LoongArch Reference Manual, if the amswap.w atomic memory access instruction has the same register number as rd and rj, the execution will trigger an Instruction Non-defined Exception, so mark the above instruction as INSN_BUG type to fix the warning. Cc: stable@vger.kernel.org Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen

objtool/LoongArch: Mark types based on break immediate code

2025-09-18T11:43:36+00:00

If the break immediate code is 0, it should mark the type as INSN_TRAP. If the break immediate code is 1, it should mark the type as INSN_BUG. While at it, format the code style and add the code comment for nop. Cc: stable@vger.kernel.org Suggested-by: WANG Rui Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen

objtool/LoongArch: Get table size correctly if LTO is enabled

2025-08-20T14:23:15+00:00

When compiling with LLVM and CONFIG_LTO_CLANG is set, there exist many objtool warnings "sibling call from callable instruction with modified stack frame". For this special case, the related object file shows that there is no generated relocation section '.rela.discard.tablejump_annotate' for the table jump instruction jirl, thus objtool can not know that what is the actual destination address. It needs to do something on the LLVM side to make sure that there is the relocation section '.rela.discard.tablejump_annotate' if LTO is enabled, but in order to maintain compatibility for the current LLVM compiler, this can be done in the kernel Makefile for now. Ensure it is aware of linker with LTO, '--loongarch-annotate-tablejump' needs to be passed via '-mllvm' to ld.lld. Before doing the above changes, it should handle the special case of the relocation section '.rela.discard.tablejump_annotate' to get the correct table size first, otherwise there are many objtool warnings and errors if LTO is enabled. There are many different rodata for each function if LTO is enabled, it is necessary to enhance get_rodata_table_size_by_table_annotate(). Fixes: b95f852d3af2 ("objtool/LoongArch: Add support for switch table") Closes: https://lore.kernel.org/loongarch/20250731175655.GA1455142@ax162/ Reported-by: Nathan Chancellor Tested-by: Nathan Chancellor Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen

objtool: Change "warning:" to "error: " for fatal errors

2025-04-01T07:07:13+00:00

This is similar to GCC's behavior and makes it more obvious why the build failed. Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Cc: Linus Torvalds Link: https://lore.kernel.org/r/0ea76f4b0e7a370711ed9f75fd0792bb5979c2bf.1743481539.git.jpoimboe@kernel.org