Tiezhu Yang 539d7344d4 objtool/LoongArch: Mark special atomic instruction as INSN_BUG type ...

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: [email protected]
Signed-off-by: Tiezhu Yang <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>

2025-09-18 19:43:36 +08:00

..

asm

objtool/LoongArch: Mark special atomic instruction as INSN_BUG type

2025-09-18 19:43:36 +08:00

uapi/asm

clone3: drop __ARCH_WANT_SYS_CLONE3 macro

2024-07-10 14:23:38 +02:00