8f639a4096
The executable can be inside a zip file using the same syntax used for
shared objects: path.zip!/libentry.so.
The linker currently requires an absolute path. This restriction could be
loosened, but it didn't seem important? If it allowed non-absolute paths,
we'd need to decide how to handle:
- foo/bar (relative to CWD?)
- foo (search PATH / LD_LIBRARY_PATH, or also relative to CWD?)
- foo.zip!/bar (normalize_path() requires an absolute path)
The linker adjusts the argc/argv passed to main() and to constructor
functions to hide the initial linker argument, but doesn't adjust the auxv
vector or files like /proc/self/{exe,cmdline,auxv,stat}. Those files will
report that the kernel loaded the linker as an executable.
I think the linker_logger.cpp change guarding against (g_argv == NULL)
isn't actually necessary, but it seemed like a good idea given that I'm
delaying initialization of g_argv until after C++ constructors have run.
Bug: http://b/112050209
Test: bionic unit tests
Change-Id: I846faf98b16fd34218946f6167e8b451897debe5
73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <android/dlext.h>
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#include <unordered_map>
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#include <vector>
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#include "linker_namespaces.h"
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#include "linker_soinfo.h"
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class ProtectedDataGuard {
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public:
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ProtectedDataGuard();
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~ProtectedDataGuard();
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private:
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void protect_data(int protection);
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static size_t ref_count_;
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};
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class ElfReader;
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std::vector<android_namespace_t*> init_default_namespaces(const char* executable_path);
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soinfo* soinfo_alloc(android_namespace_t* ns, const char* name,
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const struct stat* file_stat, off64_t file_offset,
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uint32_t rtld_flags);
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bool find_libraries(android_namespace_t* ns,
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soinfo* start_with,
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const char* const library_names[],
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size_t library_names_count,
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soinfo* soinfos[],
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std::vector<soinfo*>* ld_preloads,
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size_t ld_preloads_count,
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int rtld_flags,
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const android_dlextinfo* extinfo,
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bool add_as_children,
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bool search_linked_namespaces,
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std::vector<android_namespace_t*>* namespaces = nullptr);
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void solist_add_soinfo(soinfo* si);
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bool solist_remove_soinfo(soinfo* si);
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soinfo* solist_get_head();
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soinfo* solist_get_somain();
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soinfo* solist_get_vdso();
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