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
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 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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#ifndef _PRIVATE_BIONIC_GLOBALS_H
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#define _PRIVATE_BIONIC_GLOBALS_H
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#include <sys/cdefs.h>
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#include "private/bionic_fdsan.h"
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#include "private/bionic_malloc_dispatch.h"
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#include "private/bionic_vdso.h"
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#include "private/WriteProtected.h"
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struct libc_globals {
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vdso_entry vdso[VDSO_END];
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long setjmp_cookie;
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MallocDispatch malloc_dispatch;
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};
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__LIBC_HIDDEN__ extern WriteProtected<libc_globals> __libc_globals;
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// Globals shared between the dynamic linker and libc.so.
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struct libc_shared_globals {
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FdTable fd_table;
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// When the linker is invoked on a binary (e.g. `linker64 /system/bin/date`),
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// record the number of arguments passed to the linker itself rather than to
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// the program it's loading. Typically 0, sometimes 1.
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int initial_linker_arg_count;
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};
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__LIBC_HIDDEN__ extern libc_shared_globals* __libc_shared_globals;
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__LIBC_HIDDEN__ void __libc_init_shared_globals(libc_shared_globals*);
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__LIBC_HIDDEN__ void __libc_init_fdsan();
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class KernelArgumentBlock;
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__LIBC_HIDDEN__ void __libc_init_malloc(libc_globals* globals);
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__LIBC_HIDDEN__ void __libc_init_setjmp_cookie(libc_globals* globals, KernelArgumentBlock& args);
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__LIBC_HIDDEN__ void __libc_init_vdso(libc_globals* globals, KernelArgumentBlock& args);
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#if defined(__i386__)
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__LIBC_HIDDEN__ extern void* __libc_sysinfo;
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__LIBC_HIDDEN__ void __libc_init_sysinfo(KernelArgumentBlock& args);
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#endif
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#endif
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