^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/kprobes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "decode-insn.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "simulate-insn.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) static inline bool csky_insn_reg_get_val(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) unsigned long index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) unsigned long *ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) if (index < 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *ptr = *(®s->a0 + index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) if (index > 15 && index < 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *ptr = *(®s->exregs[0] + index - 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) switch (index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) case 14:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) *ptr = regs->usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) case 15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) *ptr = regs->lr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) case 31:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *ptr = regs->tls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline bool csky_insn_reg_set_val(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned long index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (index < 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *(®s->a0 + index) = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (index > 15 && index < 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) *(®s->exregs[0] + index - 16) = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) switch (index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) case 14:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) regs->usp = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) case 15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) regs->lr = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) case 31:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) regs->tls = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) simulate_br16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) addr + sign_extend32((opcode & 0x3ff) << 1, 9));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) simulate_br32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) simulate_bt16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (regs->sr & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) addr + sign_extend32((opcode & 0x3ff) << 1, 9));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) instruction_pointer_set(regs, addr + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) simulate_bt32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (regs->sr & 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) simulate_bf16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!(regs->sr & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) addr + sign_extend32((opcode & 0x3ff) << 1, 9));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) instruction_pointer_set(regs, addr + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) simulate_bf32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!(regs->sr & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) simulate_jmp16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) unsigned long tmp = (opcode >> 2) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) instruction_pointer_set(regs, tmp & 0xfffffffe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) simulate_jmp32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) instruction_pointer_set(regs, tmp & 0xfffffffe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) simulate_jsr16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) unsigned long tmp = (opcode >> 2) & 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) regs->lr = addr + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) instruction_pointer_set(regs, tmp & 0xfffffffe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) simulate_jsr32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) regs->lr = addr + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) instruction_pointer_set(regs, tmp & 0xfffffffe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) simulate_lrw16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) unsigned long tmp = (opcode & 0x300) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) unsigned long offset = ((opcode & 0x1f) | tmp) << 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) tmp = (opcode & 0xe0) >> 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) val = *(unsigned int *)(instruction_pointer(regs) + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) simulate_lrw32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) unsigned long offset = (opcode & 0xffff0000) >> 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) unsigned long tmp = opcode & 0x0000001f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) val = *(unsigned int *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ((instruction_pointer(regs) + offset) & 0xfffffffc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) simulate_pop16(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) unsigned long *tmp = (unsigned long *)regs->usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) for (i = 0; i < (opcode & 0xf); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) csky_insn_reg_set_val(regs, i + 4, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (opcode & 0x10) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) csky_insn_reg_set_val(regs, 15, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) regs->usp = (unsigned long)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) instruction_pointer_set(regs, regs->lr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) simulate_pop32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) unsigned long *tmp = (unsigned long *)regs->usp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) for (i = 0; i < ((opcode & 0xf0000) >> 16); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) csky_insn_reg_set_val(regs, i + 4, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (opcode & 0x100000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) csky_insn_reg_set_val(regs, 15, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) for (i = 0; i < ((opcode & 0xe00000) >> 21); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) csky_insn_reg_set_val(regs, i + 16, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (opcode & 0x1000000) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) csky_insn_reg_set_val(regs, 29, *tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) tmp += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) regs->usp = (unsigned long)tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) instruction_pointer_set(regs, regs->lr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) simulate_bez32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (tmp == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) simulate_bnez32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) csky_insn_reg_get_val(regs, tmp, &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (tmp != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) simulate_bnezad32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) csky_insn_reg_get_val(regs, tmp, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) val -= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (val > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) simulate_bhsz32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) csky_insn_reg_get_val(regs, tmp, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (val >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) simulate_bhz32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) csky_insn_reg_get_val(regs, tmp, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (val > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) simulate_blsz32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) csky_insn_reg_get_val(regs, tmp, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (val <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) simulate_blz32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) unsigned long tmp = opcode & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) csky_insn_reg_get_val(regs, tmp, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (val < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) addr + sign_extend32((opcode & 0xffff0000) >> 15, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) instruction_pointer_set(regs, addr + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) csky_insn_reg_set_val(regs, tmp, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) simulate_bsr32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) unsigned long tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) tmp = (opcode & 0xffff) << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) tmp |= (opcode & 0xffff0000) >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) instruction_pointer_set(regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) addr + sign_extend32((tmp & 0x3ffffff) << 1, 15));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) regs->lr = addr + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) simulate_jmpi32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) unsigned long offset = ((opcode & 0xffff0000) >> 14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) val = *(unsigned int *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ((instruction_pointer(regs) + offset) & 0xfffffffc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) instruction_pointer_set(regs, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) void __kprobes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) simulate_jsri32(u32 opcode, long addr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) unsigned long val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) unsigned long offset = ((opcode & 0xffff0000) >> 14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) val = *(unsigned int *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) ((instruction_pointer(regs) + offset) & 0xfffffffc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) regs->lr = addr + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) instruction_pointer_set(regs, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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