diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2021-11-18 19:25:45 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-01-05 17:52:47 -0800 |
| commit | 6dd10d9166a0c06260e0ac6b1fac454117c8024a (patch) | |
| tree | 7102788ef5eb73d674726348999476a5559ea216 | |
| parent | 9d504f9aa5c1b76673018da9503e76b351a24b8c (diff) | |
riscv: extable: consolidate definitions
This is a riscv port of commit 819771cc2892 ("arm64: extable:
consolidate definitions").
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/include/asm/asm-extable.h | 33 | ||||
| -rw-r--r-- | arch/riscv/include/asm/futex.h | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/uaccess.h | 7 | ||||
| -rw-r--r-- | arch/riscv/lib/uaccess.S | 6 |
4 files changed, 37 insertions, 10 deletions
diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h new file mode 100644 index 000000000000..b790c02dbdda --- /dev/null +++ b/arch/riscv/include/asm/asm-extable.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef __ASM_ASM_EXTABLE_H +#define __ASM_ASM_EXTABLE_H + +#ifdef __ASSEMBLY__ + +#define __ASM_EXTABLE_RAW(insn, fixup) \ + .pushsection __ex_table, "a"; \ + .balign 4; \ + .long ((insn) - .); \ + .long ((fixup) - .); \ + .popsection; + + .macro _asm_extable, insn, fixup + __ASM_EXTABLE_RAW(\insn, \fixup) + .endm + +#else /* __ASSEMBLY__ */ + +#include <linux/stringify.h> + +#define __ASM_EXTABLE_RAW(insn, fixup) \ + ".pushsection __ex_table, \"a\"\n" \ + ".balign 4\n" \ + ".long ((" insn ") - .)\n" \ + ".long ((" fixup ") - .)\n" \ + ".popsection\n" + +#define _ASM_EXTABLE(insn, fixup) __ASM_EXTABLE_RAW(#insn, #fixup) + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_ASM_EXTABLE_H */ diff --git a/arch/riscv/include/asm/futex.h b/arch/riscv/include/asm/futex.h index 3191574e135c..2e15e8e89502 100644 --- a/arch/riscv/include/asm/futex.h +++ b/arch/riscv/include/asm/futex.h @@ -11,6 +11,7 @@ #include <linux/uaccess.h> #include <linux/errno.h> #include <asm/asm.h> +#include <asm/asm-extable.h> /* We don't even really need the extable code, but for now keep it simple */ #ifndef CONFIG_MMU diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index 0f2c5b9d2e8f..40e6099af488 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -8,14 +8,9 @@ #ifndef _ASM_RISCV_UACCESS_H #define _ASM_RISCV_UACCESS_H +#include <asm/asm-extable.h> #include <asm/pgtable.h> /* for TASK_SIZE */ -#define _ASM_EXTABLE(from, to) \ - " .pushsection __ex_table, \"a\"\n" \ - " .balign 4\n" \ - " .long (" #from " - .), (" #to " - .)\n" \ - " .popsection\n" - /* * User space memory access functions */ diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S index 047f517ac780..8c475f4da308 100644 --- a/arch/riscv/lib/uaccess.S +++ b/arch/riscv/lib/uaccess.S @@ -1,15 +1,13 @@ #include <linux/linkage.h> #include <asm-generic/export.h> #include <asm/asm.h> +#include <asm/asm-extable.h> #include <asm/csr.h> .macro fixup op reg addr lbl 100: \op \reg, \addr - .section __ex_table,"a" - .balign 4 - .long (100b - .), (\lbl - .) - .previous + _asm_extable 100b, \lbl .endm ENTRY(__asm_copy_to_user) |