50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 Google LLC
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* Author: ramjiyani@google.com (Ramji Jiyani)
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*/
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#include <linux/bsearch.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/printk.h>
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#include <linux/string.h>
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/*
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* Build time generated header files
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*
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* gki_module_exported.h -- Symbols protected from _export_ by unsigned modules
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* gki_module_protected.h -- Symbols protected from _access_ by unsigned modules
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*/
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#include "gki_module_protected.h"
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#include "gki_module_exported.h"
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#define MAX_STRCMP_LEN (max(MAX_PROTECTED_NAME_LEN, MAX_EXPORTED_NAME_LEN))
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/* bsearch() comparision callback */
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static int cmp_name(const void *sym, const void *protected_sym)
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{
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return strncmp(sym, protected_sym, MAX_STRCMP_LEN);
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}
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/**
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* gki_is_module_protected_symbol - Is a symbol protected from unsigned module?
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*
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* @name: Symbol being checked against protection from unsigned module
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*/
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bool gki_is_module_protected_symbol(const char *name)
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{
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return bsearch(name, gki_protected_symbols, NO_OF_PROTECTED_SYMBOLS,
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MAX_PROTECTED_NAME_LEN, cmp_name) != NULL;
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}
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/**
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* gki_is_module_exported_symbol - Is a symbol exported from a GKI module?
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*
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* @name: Symbol being checked against exported symbols from GKI modules
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*/
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bool gki_is_module_exported_symbol(const char *name)
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{
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return bsearch(name, gki_exported_symbols, NO_OF_EXPORTED_SYMBOLS,
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MAX_EXPORTED_NAME_LEN, cmp_name) != NULL;
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}
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