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LibC+LibELF: Implement support for the dl_iterate_phdr helper

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This helper is used by libgcc_s to figure out where the .eh_frame sections
are located for all loaded shared objects.
This commit is contained in:
Gunnar Beutner 2021-04-16 21:53:43 +02:00 • committed by Andreas Kling
parent cf13fa57cd
commit 6cb28ecee8
20 changed files with 171 additions and 25 deletions
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41
Userland/Libraries/LibC/link.cpp Normal file
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/*
* Copyright (c) 2021, Gunnar Beutner <gunnar@beutner.name>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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 HOLDER 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.
*/
#include <assert.h>
#include <link.h>
extern "C" {
using DlIteratePhdrCallbackFunction = int (*)(struct dl_phdr_info*, size_t, void*);
using DlIteratePhdrFunction = int (*)(DlIteratePhdrCallbackFunction, void*);
DlIteratePhdrFunction __dl_iterate_phdr;
int dl_iterate_phdr(int (*callback)(struct dl_phdr_info* info, size_t size, void* data), void* data)
{
return __dl_iterate_phdr(callback, data);
}
}