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    Subject[PATCH v3 2/8] LoongArch: extable: Also recognize ABI names of registers
    Date
    From: WANG Rui <wangrui@loongson.cn>

    When the kernel is compiled with LLVM, the register names being handled
    during exception fixup building are ABI names instead of bare $rNN
    style. Add mapping for the ABI names for LLVM compatibility.

    Signed-off-by: WANG Rui <wangrui@loongson.cn>
    Signed-off-by: WANG Xuerui <git@xen0n.name>
    ---
    arch/loongarch/include/asm/gpr-num.h | 30 ++++++++++++++++++++++++++++
    1 file changed, 30 insertions(+)

    diff --git a/arch/loongarch/include/asm/gpr-num.h b/arch/loongarch/include/asm/gpr-num.h
    index e0941af20c7e..996038da806d 100644
    --- a/arch/loongarch/include/asm/gpr-num.h
    +++ b/arch/loongarch/include/asm/gpr-num.h
    @@ -9,6 +9,22 @@
    .equ .L__gpr_num_$r\num, \num
    .endr

    + /* ABI names of registers */
    + .equ .L__gpr_num_$ra, 1
    + .equ .L__gpr_num_$tp, 2
    + .equ .L__gpr_num_$sp, 3
    + .irp num,0,1,2,3,4,5,6,7
    + .equ .L__gpr_num_$a\num, 4 + \num
    + .endr
    + .irp num,0,1,2,3,4,5,6,7,8
    + .equ .L__gpr_num_$t\num, 12 + \num
    + .endr
    + .equ .L__gpr_num_$s9, 22
    + .equ .L__gpr_num_$fp, 22
    + .irp num,0,1,2,3,4,5,6,7,8
    + .equ .L__gpr_num_$s\num, 23 + \num
    + .endr
    +
    #else /* __ASSEMBLY__ */

    #define __DEFINE_ASM_GPR_NUMS \
    @@ -16,6 +32,20 @@
    " .irp num,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31\n" \
    " .equ .L__gpr_num_$r\\num, \\num\n" \
    " .endr\n" \
    +" .equ .L__gpr_num_$ra, 1\n" \
    +" .equ .L__gpr_num_$tp, 2\n" \
    +" .equ .L__gpr_num_$sp, 3\n" \
    +" .irp num,0,1,2,3,4,5,6,7\n" \
    +" .equ .L__gpr_num_$a\\num, 4 + \\num\n" \
    +" .endr\n" \
    +" .irp num,0,1,2,3,4,5,6,7,8\n" \
    +" .equ .L__gpr_num_$t\\num, 12 + \\num\n" \
    +" .endr\n" \
    +" .equ .L__gpr_num_$s9, 22\n" \
    +" .equ .L__gpr_num_$fp, 22\n" \
    +" .irp num,0,1,2,3,4,5,6,7,8\n" \
    +" .equ .L__gpr_num_$s\\num, 23 + \\num\n" \
    +" .endr\n" \

    #endif /* __ASSEMBLY__ */

    --
    2.40.0
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