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csky: kprobe: Fixup code in simulate without 'long' 

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@mail.gmail.com/T/#t
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Co-developed-by: Menglong Dong <dong.menglong@zte.com.cn>
Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn>
This commit is contained in:
Guo Ren 2021-01-14 07:54:37 +00:00
parent af94002bda
commit 8dcbc611f0
1 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
arch/csky/kernel/probes/simulate-insn.c
View File

@ -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