text_poke_bp(insn, code, size, NULL);
}
+static void __static_call_validate(void *insn, bool tail)
+{
+ u8 opcode = *(u8 *)insn;
+
+ if (tail) {
+ if (opcode == JMP32_INSN_OPCODE ||
+ opcode == RET_INSN_OPCODE)
+ return;
+ } else {
+ if (opcode == CALL_INSN_OPCODE ||
+ !memcmp(insn, ideal_nops[NOP_ATOMIC5], 5))
+ return;
+ }
+
+ /*
+ * If we ever trigger this, our text is corrupt, we'll probably not live long.
+ */
+ WARN_ONCE(1, "unexpected static_call insn opcode 0x%x at %pS\n", opcode, insn);
+}
+
static inline enum insn_type __sc_insn(bool null, bool tail)
{
/*
{
mutex_lock(&text_mutex);
- if (tramp)
+ if (tramp) {
+ __static_call_validate(tramp, true);
__static_call_transform(tramp, __sc_insn(!func, true), func);
+ }
- if (IS_ENABLED(CONFIG_HAVE_STATIC_CALL_INLINE) && site)
+ if (IS_ENABLED(CONFIG_HAVE_STATIC_CALL_INLINE) && site) {
+ __static_call_validate(site, tail);
__static_call_transform(site, __sc_insn(!func, tail), func);
+ }
mutex_unlock(&text_mutex);
}