linux-kernel - [peterz-queue:x86/wip.extable 6/22] arch/x86/entry/entry_32.S:989: Error: unknown pseudo-op: `.lasm_iret

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Date:   Fri, 5 Nov 2021 19:13:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [peterz-queue:x86/wip.extable 6/22] arch/x86/entry/entry_32.S:989:
 Error: unknown pseudo-op: `.lasm_iret_error'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/wip.extable
head:   a4d149db054a77aa35b04bb088f749cbb9a2edea
commit: f42d7634debdff653b927335ebad9c20fdcc6e87 [6/22] x86,entry_32: Remove .fixup usage
config: i386-randconfig-m021-20211105 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=f42d7634debdff653b927335ebad9c20fdcc6e87
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue x86/wip.extable
        git checkout f42d7634debdff653b927335ebad9c20fdcc6e87
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   arch/x86/entry/entry_32.S: Assembler messages:
>> arch/x86/entry/entry_32.S:989: Error: unknown pseudo-op: `.lasm_iret_error'


vim +989 arch/x86/entry/entry_32.S

   930	
   931	/*
   932	 * 32-bit legacy system call entry.
   933	 *
   934	 * 32-bit x86 Linux system calls traditionally used the INT $0x80
   935	 * instruction.  INT $0x80 lands here.
   936	 *
   937	 * This entry point can be used by any 32-bit perform system calls.
   938	 * Instances of INT $0x80 can be found inline in various programs and
   939	 * libraries.  It is also used by the vDSO's __kernel_vsyscall
   940	 * fallback for hardware that doesn't support a faster entry method.
   941	 * Restarted 32-bit system calls also fall back to INT $0x80
   942	 * regardless of what instruction was originally used to do the system
   943	 * call.  (64-bit programs can use INT $0x80 as well, but they can
   944	 * only run on 64-bit kernels and therefore land in
   945	 * entry_INT80_compat.)
   946	 *
   947	 * This is considered a slow path.  It is not used by most libc
   948	 * implementations on modern hardware except during process startup.
   949	 *
   950	 * Arguments:
   951	 * eax  system call number
   952	 * ebx  arg1
   953	 * ecx  arg2
   954	 * edx  arg3
   955	 * esi  arg4
   956	 * edi  arg5
   957	 * ebp  arg6
   958	 */
   959	SYM_FUNC_START(entry_INT80_32)
   960		ASM_CLAC
   961		pushl	%eax			/* pt_regs->orig_ax */
   962	
   963		SAVE_ALL pt_regs_ax=$-ENOSYS switch_stacks=1	/* save rest */
   964	
   965		movl	%esp, %eax
   966		call	do_int80_syscall_32
   967	.Lsyscall_32_done:
   968		STACKLEAK_ERASE
   969	
   970	restore_all_switch_stack:
   971		SWITCH_TO_ENTRY_STACK
   972		CHECK_AND_APPLY_ESPFIX
   973	
   974		/* Switch back to user CR3 */
   975		SWITCH_TO_USER_CR3 scratch_reg=%eax
   976	
   977		BUG_IF_WRONG_CR3
   978	
   979		/* Restore user state */
   980		RESTORE_REGS pop=4			# skip orig_eax/error_code
   981	.Lirq_return:
   982		/*
   983		 * ARCH_HAS_MEMBARRIER_SYNC_CORE rely on IRET core serialization
   984		 * when returning from IPI handler and when returning from
   985		 * scheduler to user-space.
   986		 */
   987		iret
   988	
 > 989	.Lasm_iret_error
   990		pushl	$0				# no error code
   991		pushl	$iret_error
   992	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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