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/*
* Copyright (C) 2019 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <link.h>
#include <stdint.h>
#include <stdlib.h>
#include <utility>
#include <vector>
#include "linker_common_types.h"
#include "linker_globals.h"
#include "linker_soinfo.h"
static constexpr ElfW(Versym) kVersymHiddenBit = 0x8000;
enum RelocationKind {
kRelocAbsolute = 0,
kRelocRelative,
kRelocSymbol,
kRelocSymbolCached,
kRelocMax
};
void count_relocation(RelocationKind kind);
template <bool Enabled> void count_relocation_if(RelocationKind kind) {
if (Enabled) count_relocation(kind);
}
void print_linker_stats();
inline bool is_symbol_global_and_defined(const soinfo* si, const ElfW(Sym)* s) {
if (__predict_true(ELF_ST_BIND(s->st_info) == STB_GLOBAL ||
ELF_ST_BIND(s->st_info) == STB_WEAK)) {
return s->st_shndx != SHN_UNDEF;
} else if (__predict_false(ELF_ST_BIND(s->st_info) != STB_LOCAL)) {
DL_WARN("Warning: unexpected ST_BIND value: %d for \"%s\" in \"%s\" (ignoring)",
ELF_ST_BIND(s->st_info), si->get_string(s->st_name), si->get_realpath());
}
return false;
}
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