4d4377881d
Add basic assembly stubs for TLS Descriptor support in the dynamic linker, and enable several code paths related to TLSDESC for RISC-V. Note: This patch requires an updated toolchain that supports TLSDESC for RISC-V, and the `-mtls-dialect=` compiler option specifically. Test: adb shell /data/nativetest64/bionic-unit-tests/bionic-unit-tests --gtest_filter=*tls* Bug: 322984914 Change-Id: I74bd0fa216b44b4ca2c5a5a6aec37b3fc47b00d9
44 lines
2 KiB
C
44 lines
2 KiB
C
/*
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* Copyright (C) 2024 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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#if defined(__riscv)
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// TLS_DTV_OFFSET is a constant used in relocation fields, defined in RISC-V ELF Specification[1]
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// The front of the TCB contains a pointer to the DTV, and each pointer in DTV
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// points to 0x800 past the start of a TLS block to make full use of the range
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// of load/store instructions, refer to [2].
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//
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// [1]: RISC-V ELF Specification.
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// https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc#constants
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// [2]: Documentation of TLS data structures
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// https://github.com/riscv-non-isa/riscv-elf-psabi-doc/issues/53
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#define TLS_DTV_OFFSET 0x800
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#else
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#define TLS_DTV_OFFSET 0
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#endif
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