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| author | Jian Cai <caij2003@gmail.com> | 2020-07-15 02:30:21 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-07-16 18:25:09 +0300 |
| commit | 6ee93f8df09c470da1a4af11e394c52d7b62418c (patch) | |
| tree | abb7da7932664cac251ad817628884ea1363d55d /arch/x86/include | |
| parent | bd87e6f6610aa96fde01ee6653e162213f7ec836 (diff) | |
| download | linux-6ee93f8df09c470da1a4af11e394c52d7b62418c.tar.xz | |
x86/entry: Add compatibility with IAS
Clang's integrated assembler does not allow symbols with non-absolute
values to be reassigned. Modify the interrupt entry loop macro to be
compatible with IAS by using a label and an offset.
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Brian Gerst <brgerst@gmail.com>
Suggested-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Jian Cai <caij2003@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> #
Link: https://github.com/ClangBuiltLinux/linux/issues/1043
Link: https://lkml.kernel.org/r/20200714233024.1789985-1-caij2003@gmail.com
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/idtentry.h | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index f3d70830bf2a..5efaaed34eda 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -469,16 +469,15 @@ __visible noinstr void func(struct pt_regs *regs, \ .align 8 SYM_CODE_START(irq_entries_start) vector=FIRST_EXTERNAL_VECTOR - pos = . .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) UNWIND_HINT_IRET_REGS +0 : .byte 0x6a, vector jmp asm_common_interrupt nop /* Ensure that the above is 8 bytes max */ - . = pos + 8 - pos=pos+8 - vector=vector+1 + . = 0b + 8 + vector = vector+1 .endr SYM_CODE_END(irq_entries_start) @@ -486,16 +485,15 @@ SYM_CODE_END(irq_entries_start) .align 8 SYM_CODE_START(spurious_entries_start) vector=FIRST_SYSTEM_VECTOR - pos = . .rept (NR_VECTORS - FIRST_SYSTEM_VECTOR) UNWIND_HINT_IRET_REGS +0 : .byte 0x6a, vector jmp asm_spurious_interrupt nop /* Ensure that the above is 8 bytes max */ - . = pos + 8 - pos=pos+8 - vector=vector+1 + . = 0b + 8 + vector = vector+1 .endr SYM_CODE_END(spurious_entries_start) #endif |