1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 3 #ifndef _RISCV_KERNEL_PROBES_SIMULATE_INSN_H 4 #define _RISCV_KERNEL_PROBES_SIMULATE_INSN_H 5 6 #define __RISCV_INSN_FUNCS(name, mask, val) \ 7 static __always_inline bool riscv_insn_is_##name(probe_opcode_t code) \ 8 { \ 9 BUILD_BUG_ON(~(mask) & (val)); \ 10 return (code & (mask)) == (val); \ 11 } \ 12 bool simulate_##name(u32 opcode, unsigned long addr, \ 13 struct pt_regs *regs) 14 15 #define RISCV_INSN_REJECTED(name, code) \ 16 do { \ 17 if (riscv_insn_is_##name(code)) { \ 18 return INSN_REJECTED; \ 19 } \ 20 } while (0) 21 22 __RISCV_INSN_FUNCS(system, 0x7f, 0x73); 23 __RISCV_INSN_FUNCS(fence, 0x7f, 0x0f); 24 25 #define RISCV_INSN_SET_SIMULATE(name, code) \ 26 do { \ 27 if (riscv_insn_is_##name(code)) { \ 28 api->handler = simulate_##name; \ 29 return INSN_GOOD_NO_SLOT; \ 30 } \ 31 } while (0) 32 33 __RISCV_INSN_FUNCS(c_j, 0xe003, 0xa001); 34 __RISCV_INSN_FUNCS(c_jr, 0xf07f, 0x8002); 35 __RISCV_INSN_FUNCS(c_jal, 0xe003, 0x2001); 36 __RISCV_INSN_FUNCS(c_jalr, 0xf07f, 0x9002); 37 __RISCV_INSN_FUNCS(c_beqz, 0xe003, 0xc001); 38 __RISCV_INSN_FUNCS(c_bnez, 0xe003, 0xe001); 39 __RISCV_INSN_FUNCS(c_ebreak, 0xffff, 0x9002); 40 41 __RISCV_INSN_FUNCS(auipc, 0x7f, 0x17); 42 __RISCV_INSN_FUNCS(branch, 0x7f, 0x63); 43 44 __RISCV_INSN_FUNCS(jal, 0x7f, 0x6f); 45 __RISCV_INSN_FUNCS(jalr, 0x707f, 0x67); 46 47 #endif /* _RISCV_KERNEL_PROBES_SIMULATE_INSN_H */ 48