diff options
Diffstat (limited to 'arch/riscv/kernel/probes/simulate-insn.h')
| -rw-r--r-- | arch/riscv/kernel/probes/simulate-insn.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/riscv/kernel/probes/simulate-insn.h b/arch/riscv/kernel/probes/simulate-insn.h new file mode 100644 index 000000000..de8474146 --- /dev/null +++ b/arch/riscv/kernel/probes/simulate-insn.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ + +#ifndef _RISCV_KERNEL_PROBES_SIMULATE_INSN_H +#define _RISCV_KERNEL_PROBES_SIMULATE_INSN_H + +#define __RISCV_INSN_FUNCS(name, mask, val) \ +static __always_inline bool riscv_insn_is_##name(probe_opcode_t code) \ +{ \ + BUILD_BUG_ON(~(mask) & (val)); \ + return (code & (mask)) == (val); \ +} \ +bool simulate_##name(u32 opcode, unsigned long addr, \ + struct pt_regs *regs) + +#define RISCV_INSN_REJECTED(name, code) \ + do { \ + if (riscv_insn_is_##name(code)) { \ + return INSN_REJECTED; \ + } \ + } while (0) + +__RISCV_INSN_FUNCS(system, 0x7f, 0x73); +__RISCV_INSN_FUNCS(fence, 0x7f, 0x0f); + +#define RISCV_INSN_SET_SIMULATE(name, code) \ + do { \ + if (riscv_insn_is_##name(code)) { \ + api->handler = simulate_##name; \ + return INSN_GOOD_NO_SLOT; \ + } \ + } while (0) + +__RISCV_INSN_FUNCS(c_j, 0xe003, 0xa001); +__RISCV_INSN_FUNCS(c_jr, 0xf07f, 0x8002); +__RISCV_INSN_FUNCS(c_jal, 0xe003, 0x2001); +__RISCV_INSN_FUNCS(c_jalr, 0xf07f, 0x9002); +__RISCV_INSN_FUNCS(c_beqz, 0xe003, 0xc001); +__RISCV_INSN_FUNCS(c_bnez, 0xe003, 0xe001); +__RISCV_INSN_FUNCS(c_ebreak, 0xffff, 0x9002); + +__RISCV_INSN_FUNCS(auipc, 0x7f, 0x17); +__RISCV_INSN_FUNCS(branch, 0x7f, 0x63); + +__RISCV_INSN_FUNCS(jal, 0x7f, 0x6f); +__RISCV_INSN_FUNCS(jalr, 0x707f, 0x67); + +#endif /* _RISCV_KERNEL_PROBES_SIMULATE_INSN_H */ |