diff options
Diffstat (limited to 'arch/riscv/include/asm/assembler.h')
| -rw-r--r-- | arch/riscv/include/asm/assembler.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/assembler.h b/arch/riscv/include/asm/assembler.h index 16931712beab..a8df1999118b 100644 --- a/arch/riscv/include/asm/assembler.h +++ b/arch/riscv/include/asm/assembler.h @@ -80,3 +80,47 @@ .endm #endif /* __ASM_ASSEMBLER_H */ + +#if defined(VDSO_CFI) && (__riscv_xlen == 64) +.macro vdso_lpad, label = 0 +lpad \label +.endm +#else +.macro vdso_lpad, label = 0 +.endm +#endif + +/* + * This macro emits a program property note section identifying + * architecture features which require special handling, mainly for + * use in assembly files included in the VDSO. + */ +#define NT_GNU_PROPERTY_TYPE_0 5 +#define GNU_PROPERTY_RISCV_FEATURE_1_AND 0xc0000000 + +#define GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP BIT(0) +#define GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS BIT(1) + +#if defined(VDSO_CFI) && (__riscv_xlen == 64) +#define GNU_PROPERTY_RISCV_FEATURE_1_DEFAULT \ + (GNU_PROPERTY_RISCV_FEATURE_1_ZICFILP | GNU_PROPERTY_RISCV_FEATURE_1_ZICFISS) +#endif + +#ifdef GNU_PROPERTY_RISCV_FEATURE_1_DEFAULT +.macro emit_riscv_feature_1_and, feat = GNU_PROPERTY_RISCV_FEATURE_1_DEFAULT + .pushsection .note.gnu.property, "a" + .p2align 3 + .word 4 + .word 16 + .word NT_GNU_PROPERTY_TYPE_0 + .asciz "GNU" + .word GNU_PROPERTY_RISCV_FEATURE_1_AND + .word 4 + .word \feat + .word 0 + .popsection +.endm +#else +.macro emit_riscv_feature_1_and, feat = 0 +.endm +#endif |