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author | Jisheng Zhang <jszhang@kernel.org> | 2021-11-18 19:26:05 +0800 |
---|---|---|
committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-01-05 17:52:54 -0800 |
commit | 2bf847db0c7437c28b10fba2981b9a7db4b4e0e2 (patch) | |
tree | f0248762ab49f86e123c5ac25f457e3565677d2b /arch/riscv/include | |
parent | 6dd10d9166a0c06260e0ac6b1fac454117c8024a (diff) | |
download | linux-2bf847db0c7437c28b10fba2981b9a7db4b4e0e2.tar.gz linux-2bf847db0c7437c28b10fba2981b9a7db4b4e0e2.tar.bz2 linux-2bf847db0c7437c28b10fba2981b9a7db4b4e0e2.zip |
riscv: extable: add `type` and `data` fields
This is a riscv port of commit d6e2cc564775 ("arm64: extable: add `type`
and `data` fields").
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
-rw-r--r-- | arch/riscv/include/asm/asm-extable.h | 25 | ||||
-rw-r--r-- | arch/riscv/include/asm/extable.h | 17 |
2 files changed, 31 insertions, 11 deletions
diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h index b790c02dbdda..1b1f4ffd8d37 100644 --- a/arch/riscv/include/asm/asm-extable.h +++ b/arch/riscv/include/asm/asm-extable.h @@ -2,31 +2,40 @@ #ifndef __ASM_ASM_EXTABLE_H #define __ASM_ASM_EXTABLE_H +#define EX_TYPE_NONE 0 +#define EX_TYPE_FIXUP 1 +#define EX_TYPE_BPF 2 + #ifdef __ASSEMBLY__ -#define __ASM_EXTABLE_RAW(insn, fixup) \ - .pushsection __ex_table, "a"; \ - .balign 4; \ - .long ((insn) - .); \ - .long ((fixup) - .); \ +#define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ + .pushsection __ex_table, "a"; \ + .balign 4; \ + .long ((insn) - .); \ + .long ((fixup) - .); \ + .short (type); \ + .short (data); \ .popsection; .macro _asm_extable, insn, fixup - __ASM_EXTABLE_RAW(\insn, \fixup) + __ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) .endm #else /* __ASSEMBLY__ */ #include <linux/stringify.h> -#define __ASM_EXTABLE_RAW(insn, fixup) \ +#define __ASM_EXTABLE_RAW(insn, fixup, type, data) \ ".pushsection __ex_table, \"a\"\n" \ ".balign 4\n" \ ".long ((" insn ") - .)\n" \ ".long ((" fixup ") - .)\n" \ + ".short (" type ")\n" \ + ".short (" data ")\n" \ ".popsection\n" -#define _ASM_EXTABLE(insn, fixup) __ASM_EXTABLE_RAW(#insn, #fixup) +#define _ASM_EXTABLE(insn, fixup) \ + __ASM_EXTABLE_RAW(#insn, #fixup, __stringify(EX_TYPE_FIXUP), "0") #endif /* __ASSEMBLY__ */ diff --git a/arch/riscv/include/asm/extable.h b/arch/riscv/include/asm/extable.h index e4374dde02b4..512012d193dc 100644 --- a/arch/riscv/include/asm/extable.h +++ b/arch/riscv/include/asm/extable.h @@ -17,18 +17,29 @@ struct exception_table_entry { int insn, fixup; + short type, data; }; #define ARCH_HAS_RELATIVE_EXTABLE +#define swap_ex_entry_fixup(a, b, tmp, delta) \ +do { \ + (a)->fixup = (b)->fixup + (delta); \ + (b)->fixup = (tmp).fixup - (delta); \ + (a)->type = (b)->type; \ + (b)->type = (tmp).type; \ + (a)->data = (b)->data; \ + (b)->data = (tmp).data; \ +} while (0) + bool fixup_exception(struct pt_regs *regs); #if defined(CONFIG_BPF_JIT) && defined(CONFIG_ARCH_RV64I) -bool rv_bpf_fixup_exception(const struct exception_table_entry *ex, struct pt_regs *regs); +bool ex_handler_bpf(const struct exception_table_entry *ex, struct pt_regs *regs); #else static inline bool -rv_bpf_fixup_exception(const struct exception_table_entry *ex, - struct pt_regs *regs) +ex_handler_bpf(const struct exception_table_entry *ex, + struct pt_regs *regs) { return false; } |