!!__bpf_address_lookup(addr, symbolsize, offset, namebuf);
}
+#ifdef CONFIG_CFI_CLANG
+/*
+ * LLVM appends .cfi to function names when CONFIG_CFI_CLANG is enabled,
+ * which causes confusion and potentially breaks user space tools, so we
+ * will strip the postfix from expanded symbol names.
+ */
+static inline void cleanup_symbol_name(char *s)
+{
+ char *res;
+
+ res = strrchr(s, '.');
+ if (res && !strcmp(res, ".cfi"))
+ *res = '\0';
+}
+#else
+static inline void cleanup_symbol_name(char *s) {}
+#endif
+
/*
* Lookup an address
* - modname is set to NULL if it's in the kernel.
namebuf, KSYM_NAME_LEN);
if (modname)
*modname = NULL;
- return namebuf;
+
+ ret = namebuf;
+ goto found;
}
/* See if it's in a module or a BPF JITed image. */
if (!ret)
ret = bpf_address_lookup(addr, symbolsize,
offset, modname, namebuf);
+
+found:
+ cleanup_symbol_name(namebuf);
return ret;
}
int lookup_symbol_name(unsigned long addr, char *symname)
{
+ int res;
+
symname[0] = '\0';
symname[KSYM_NAME_LEN - 1] = '\0';
/* Grab name */
kallsyms_expand_symbol(get_symbol_offset(pos),
symname, KSYM_NAME_LEN);
- return 0;
+ goto found;
}
/* See if it's in a module. */
- return lookup_module_symbol_name(addr, symname);
+ res = lookup_module_symbol_name(addr, symname);
+ if (res)
+ return res;
+
+found:
+ cleanup_symbol_name(symname);
+ return 0;
}
int lookup_symbol_attrs(unsigned long addr, unsigned long *size,
unsigned long *offset, char *modname, char *name)
{
+ int res;
+
name[0] = '\0';
name[KSYM_NAME_LEN - 1] = '\0';
kallsyms_expand_symbol(get_symbol_offset(pos),
name, KSYM_NAME_LEN);
modname[0] = '\0';
- return 0;
+ goto found;
}
/* See if it's in a module. */
- return lookup_module_symbol_attrs(addr, size, offset, modname, name);
+ res = lookup_module_symbol_attrs(addr, size, offset, modname, name);
+ if (res)
+ return res;
+
+found:
+ cleanup_symbol_name(name);
+ return 0;
}
/* Look up a kernel symbol and return it in a text buffer. */