bool arch_is_rethunk(struct symbol *sym)
{
- return !strcmp(sym->name, "__x86_return_thunk") ||
- !strcmp(sym->name, "srso_untrain_ret") ||
- !strcmp(sym->name, "srso_safe_ret") ||
- !strcmp(sym->name, "retbleed_return_thunk");
+ return !strcmp(sym->name, "__x86_return_thunk");
+}
+
+bool arch_is_embedded_insn(struct symbol *sym)
+{
+ return !strcmp(sym->name, "retbleed_return_thunk") ||
+ !strcmp(sym->name, "srso_safe_ret");
}
return 0;
}
+/*
+ * Symbols that replace INSN_CALL_DYNAMIC, every (tail) call to such a symbol
+ * will be added to the .retpoline_sites section.
+ */
__weak bool arch_is_retpoline(struct symbol *sym)
{
return false;
}
+/*
+ * Symbols that replace INSN_RETURN, every (tail) call to such a symbol
+ * will be added to the .return_sites section.
+ */
__weak bool arch_is_rethunk(struct symbol *sym)
{
return false;
}
+/*
+ * Symbols that are embedded inside other instructions, because sometimes crazy
+ * code exists. These are mostly ignored for validation purposes.
+ */
+__weak bool arch_is_embedded_insn(struct symbol *sym)
+{
+ return false;
+}
+
#define NEGATIVE_RELOC ((void *)-1L)
static struct reloc *insn_reloc(struct objtool_file *file, struct instruction *insn)
* middle of another instruction. Objtool only
* knows about the outer instruction.
*/
- if (sym && sym->return_thunk) {
+ if (sym && sym->embedded_insn) {
add_return_call(file, insn, false);
continue;
}
if (arch_is_rethunk(func))
func->return_thunk = true;
+ if (arch_is_embedded_insn(func))
+ func->embedded_insn = true;
+
if (!strcmp(func->name, "__fentry__"))
func->fentry = true;