From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> The type of 'val' is 'unsigned long' in simulate_blz32, so 'val < 0' can't be true. Cast 'val' to 'long' here to determine branch token or not, Fixup instructions: bnezad32, bhsz32, bhz32, blsz32, blz32 Link: https://lore.kernel.org/linux-csky/CAJF2gTQjKXR9gpo06WAWG1aquiT87mATiMGorXs6ChxOxoe90Q@xxxxxxxxxxxxxx/T/#t Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Co-developed-by: Menglong Dong <dong.menglong@xxxxxxxxxx> Signed-off-by: Menglong Dong <dong.menglong@xxxxxxxxxx> --- arch/csky/kernel/probes/simulate-insn.c | 22 +++++++--------------- 1 file changed, 7 insertions(+), 15 deletions(-) diff --git a/arch/csky/kernel/probes/simulate-insn.c b/arch/csky/kernel/probes/simulate-insn.c index 4e464fed52ec..d6e8d092c9b7 100644 --- a/arch/csky/kernel/probes/simulate-insn.c +++ b/arch/csky/kernel/probes/simulate-insn.c @@ -274,9 +274,9 @@ void __kprobes simulate_bnezad32(u32 opcode, long addr, struct pt_regs *regs) { unsigned long tmp = opcode & 0x1f; - unsigned long val; + long val; - csky_insn_reg_get_val(regs, tmp, &val); + csky_insn_reg_get_val(regs, tmp, (unsigned long *)&val); val -= 1; @@ -286,7 +286,7 @@ simulate_bnezad32(u32 opcode, long addr, struct pt_regs *regs) } else instruction_pointer_set(regs, addr + 4); - csky_insn_reg_set_val(regs, tmp, val); + csky_insn_reg_set_val(regs, tmp, (unsigned long)val); } void __kprobes @@ -297,13 +297,11 @@ simulate_bhsz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val >= 0) { + if ((long) val >= 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -314,13 +312,11 @@ simulate_bhz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val > 0) { + if ((long) val > 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -331,13 +327,11 @@ simulate_blsz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val <= 0) { + if ((long) val <= 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes @@ -348,13 +342,11 @@ simulate_blz32(u32 opcode, long addr, struct pt_regs *regs) csky_insn_reg_get_val(regs, tmp, &val); - if (val < 0) { + if ((long) val < 0) { instruction_pointer_set(regs, addr + sign_extend32((opcode & 0xffff0000) >> 15, 15)); } else instruction_pointer_set(regs, addr + 4); - - csky_insn_reg_set_val(regs, tmp, val); } void __kprobes -- 2.17.1
