diff options
| 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/mm | |
| parent | 6dd10d9166a0c06260e0ac6b1fac454117c8024a (diff) | |
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/mm')
| -rw-r--r-- | arch/riscv/mm/extable.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/riscv/mm/extable.c b/arch/riscv/mm/extable.c index 3c561f1d0115..91e52c4bb33a 100644 --- a/arch/riscv/mm/extable.c +++ b/arch/riscv/mm/extable.c @@ -10,6 +10,20 @@ #include <linux/extable.h> #include <linux/module.h> #include <linux/uaccess.h> +#include <asm/asm-extable.h> + +static inline unsigned long +get_ex_fixup(const struct exception_table_entry *ex) +{ + return ((unsigned long)&ex->fixup + ex->fixup); +} + +static bool ex_handler_fixup(const struct exception_table_entry *ex, + struct pt_regs *regs) +{ + regs->epc = get_ex_fixup(ex); + return true; +} bool fixup_exception(struct pt_regs *regs) { @@ -19,9 +33,12 @@ bool fixup_exception(struct pt_regs *regs) if (!ex) return false; - if (regs->epc >= BPF_JIT_REGION_START && regs->epc < BPF_JIT_REGION_END) - return rv_bpf_fixup_exception(ex, regs); + switch (ex->type) { + case EX_TYPE_FIXUP: + return ex_handler_fixup(ex, regs); + case EX_TYPE_BPF: + return ex_handler_bpf(ex, regs); + } - regs->epc = (unsigned long)&ex->fixup + ex->fixup; - return true; + BUG(); } |