a2e83ab348
Previously, Bionic's dl_phdr_info only included the first four
dl_iterate_phdr fields. Several other libc's have these additional fields:
unsigned long long dlpi_adds -- incremented when a library is loaded
unsigned long long dlpi_subs -- incremented when a library is unloaded
size_t dlpi_tls_modid -- TLS module ID
void* dlpi_tls_data -- pointer to current thread's TLS block or NULL
These extra fields are also exposed by glibc, musl, and FreeBSD. The
unwinder in libgcc.a, linked into shipping Android DSOs, has a
PC->eh_frame cache that activates if dl_phdr_info has the dlpi_adds and
dlpi_subs fields (indicated at run-time by a sufficiently-large size
argument to the callback).
Bug: https://github.com/android-ndk/ndk/issues/1062
Test: bionic unit tests
Change-Id: I6f0bab548cf8c828af2ddab9eb01c5c6d70cd81f
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*
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* Copyright (C) 2012 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 _LINK_H_
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#define _LINK_H_
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <elf.h>
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__BEGIN_DECLS
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#if defined(__LP64__)
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#define ElfW(type) Elf64_ ## type
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#else
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#define ElfW(type) Elf32_ ## type
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#endif
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struct dl_phdr_info {
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ElfW(Addr) dlpi_addr;
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const char* dlpi_name;
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const ElfW(Phdr)* dlpi_phdr;
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ElfW(Half) dlpi_phnum;
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// These fields were added in Android R.
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unsigned long long dlpi_adds;
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unsigned long long dlpi_subs;
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size_t dlpi_tls_modid;
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void* dlpi_tls_data;
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};
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#if defined(__arm__)
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int dl_iterate_phdr(int (*__callback)(struct dl_phdr_info*, size_t, void*), void* __data) __INTRODUCED_IN(21);
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#else
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int dl_iterate_phdr(int (*__callback)(struct dl_phdr_info*, size_t, void*), void* __data);
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#endif
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#ifdef __arm__
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typedef uintptr_t _Unwind_Ptr;
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_Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr, int*);
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#endif
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/* Used by the dynamic linker to communicate with the debugger. */
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struct link_map {
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ElfW(Addr) l_addr;
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char* l_name;
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ElfW(Dyn)* l_ld;
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struct link_map* l_next;
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struct link_map* l_prev;
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};
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/* Used by the dynamic linker to communicate with the debugger. */
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struct r_debug {
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int32_t r_version;
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struct link_map* r_map;
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ElfW(Addr) r_brk;
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enum {
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RT_CONSISTENT,
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RT_ADD,
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RT_DELETE
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} r_state;
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ElfW(Addr) r_ldbase;
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};
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__END_DECLS
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#endif
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