862a23dfdf
crt_pad_segment provides a note of type NT_ANDROID_TYPE_PAD_SEGMENT. It's intended when present is for the loader to pad segment gaps to reduce kernel slab memory usage (due to additional vm_area_struct's for gaps). crt_pad_segment.o retains control to the static linker so that app developers can opt out (build with different flags) it there are undesireable side effects. Section Headers: [Nr] Name Type Address Off Size ES Flg Lk Inf Al [ 0] NULL 0000000000000000 000000 000000 00 0 0 0 [ 1] .strtab STRTAB 0000000000000000 0000f8 000066 00 0 0 1 [ 2] .text PROGBITS 0000000000000000 000040 000000 00 AX 0 0 4 [ 3] .note.GNU-stack PROGBITS 0000000000000000 000040 000000 00 0 0 1 [ 4] .note.android.pad_segment NOTE 0000000000000000 000040 00001c 00 A 0 0 4 [ 5] .rela.note.android.pad_segment RELA 0000000000000000 0000e0 000018 18 I 7 4 8 [ 6] .debug_line PROGBITS 0000000000000000 00005c 000052 00 0 0 1 [ 7] .symtab SYMTAB 0000000000000000 0000b0 000030 18 1 1 8 Key to Flags: W (write), A (alloc), X (execute), M (merge), S (strings), I (info), L (link order), O (extra OS processing required), G (group), T (TLS), C (compressed), x (unknown), o (OS specific), E (exclude), D (mbind), l (large), p (processor specific) Bug: 316403210 Test: m -j50 ndk Test: find out/soong/ndk -name 'crt_pad_segment.o' Test: readelf -SW crt_pag_segment.o Change-Id: I94af5e85fd602e7ba5fd56788ae39277368229d8 Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
34 lines
1.5 KiB
C
34 lines
1.5 KiB
C
/*
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* Copyright (C) 2021 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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#define NT_ANDROID_TYPE_IDENT 1
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#define NT_ANDROID_TYPE_KUSER 3
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#define NT_ANDROID_TYPE_MEMTAG 4
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#define NT_ANDROID_TYPE_PAD_SEGMENT 5
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