summaryrefslogtreecommitdiff
path: root/arch/arm64/kernel/insn.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm64/kernel/insn.c')
-rw-r--r--arch/arm64/kernel/insn.c46
1 files changed, 29 insertions, 17 deletions
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 4a9e773a177f..684d871ae38d 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -51,21 +51,33 @@ enum aarch64_insn_encoding_class __kprobes aarch64_get_insn_class(u32 insn)
return aarch64_insn_encoding_class[(insn >> 25) & 0xf];
}
-/* NOP is an alias of HINT */
-bool __kprobes aarch64_insn_is_nop(u32 insn)
+bool __kprobes aarch64_insn_is_steppable_hint(u32 insn)
{
if (!aarch64_insn_is_hint(insn))
return false;
switch (insn & 0xFE0) {
- case AARCH64_INSN_HINT_YIELD:
- case AARCH64_INSN_HINT_WFE:
- case AARCH64_INSN_HINT_WFI:
- case AARCH64_INSN_HINT_SEV:
- case AARCH64_INSN_HINT_SEVL:
- return false;
- default:
+ case AARCH64_INSN_HINT_XPACLRI:
+ case AARCH64_INSN_HINT_PACIA_1716:
+ case AARCH64_INSN_HINT_PACIB_1716:
+ case AARCH64_INSN_HINT_AUTIA_1716:
+ case AARCH64_INSN_HINT_AUTIB_1716:
+ case AARCH64_INSN_HINT_PACIAZ:
+ case AARCH64_INSN_HINT_PACIASP:
+ case AARCH64_INSN_HINT_PACIBZ:
+ case AARCH64_INSN_HINT_PACIBSP:
+ case AARCH64_INSN_HINT_AUTIAZ:
+ case AARCH64_INSN_HINT_AUTIASP:
+ case AARCH64_INSN_HINT_AUTIBZ:
+ case AARCH64_INSN_HINT_AUTIBSP:
+ case AARCH64_INSN_HINT_BTI:
+ case AARCH64_INSN_HINT_BTIC:
+ case AARCH64_INSN_HINT_BTIJ:
+ case AARCH64_INSN_HINT_BTIJC:
+ case AARCH64_INSN_HINT_NOP:
return true;
+ default:
+ return false;
}
}
@@ -574,7 +586,7 @@ u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr,
offset >> 2);
}
-u32 __kprobes aarch64_insn_gen_hint(enum aarch64_insn_hint_op op)
+u32 __kprobes aarch64_insn_gen_hint(enum aarch64_insn_hint_cr_op op)
{
return aarch64_insn_get_hint_value() | op;
}
@@ -1535,16 +1547,10 @@ static u32 aarch64_encode_immediate(u64 imm,
u32 insn)
{
unsigned int immr, imms, n, ones, ror, esz, tmp;
- u64 mask = ~0UL;
-
- /* Can't encode full zeroes or full ones */
- if (!imm || !~imm)
- return AARCH64_BREAK_FAULT;
+ u64 mask;
switch (variant) {
case AARCH64_INSN_VARIANT_32BIT:
- if (upper_32_bits(imm))
- return AARCH64_BREAK_FAULT;
esz = 32;
break;
case AARCH64_INSN_VARIANT_64BIT:
@@ -1556,6 +1562,12 @@ static u32 aarch64_encode_immediate(u64 imm,
return AARCH64_BREAK_FAULT;
}
+ mask = GENMASK(esz - 1, 0);
+
+ /* Can't encode full zeroes, full ones, or value wider than the mask */
+ if (!imm || imm == mask || imm & ~mask)
+ return AARCH64_BREAK_FAULT;
+
/*
* Inverse of Replicate(). Try to spot a repeating pattern
* with a pow2 stride.