2be5abb7e9
ELF-based platforms currently support defining multiple static initializer table sections with differing priorities, for example .init_array.0 or .init_array.100; the default .init_array corresponds to a priority of 65535. When building a shared library or executable, the system linker normally sorts these sections and combines them into a single .init_array section. This change adds the capability to recognize ELF static initializers with priorities other than the default, and to properly sort them by priority, to Orc and the Orc runtime. Reviewed By: lhames Differential Revision: https://reviews.llvm.org/D127056
132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
//===- elfnix_platform.h ----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// ORC Runtime support for dynamic loading features on ELF-based platforms.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ORC_RT_ELFNIX_PLATFORM_H
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#define ORC_RT_ELFNIX_PLATFORM_H
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#include "common.h"
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#include "executor_address.h"
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// Atexit functions.
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ORC_RT_INTERFACE int __orc_rt_elfnix_cxa_atexit(void (*func)(void *), void *arg,
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void *dso_handle);
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ORC_RT_INTERFACE int __orc_rt_elfnix_atexit(void (*func)(void *));
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ORC_RT_INTERFACE void __orc_rt_elfnix_cxa_finalize(void *dso_handle);
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// dlfcn functions.
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ORC_RT_INTERFACE const char *__orc_rt_elfnix_jit_dlerror();
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ORC_RT_INTERFACE void *__orc_rt_elfnix_jit_dlopen(const char *path, int mode);
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ORC_RT_INTERFACE int __orc_rt_elfnix_jit_dlclose(void *dso_handle);
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ORC_RT_INTERFACE void *__orc_rt_elfnix_jit_dlsym(void *dso_handle,
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const char *symbol);
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namespace __orc_rt {
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namespace elfnix {
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struct ELFNixPerObjectSectionsToRegister {
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ExecutorAddrRange EHFrameSection;
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ExecutorAddrRange ThreadDataSection;
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};
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struct ELFNixJITDylibInitializers {
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using SectionList = std::vector<ExecutorAddrRange>;
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ELFNixJITDylibInitializers() = default;
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ELFNixJITDylibInitializers(std::string Name, ExecutorAddr DSOHandleAddress)
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: Name(std::move(Name)), DSOHandleAddress(std::move(DSOHandleAddress)) {}
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std::string Name;
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ExecutorAddr DSOHandleAddress;
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std::vector<std::pair<std::string, SectionList>> InitSections;
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};
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class ELFNixJITDylibDeinitializers {};
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using ELFNixJITDylibInitializerSequence =
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std::vector<ELFNixJITDylibInitializers>;
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using ELFNixJITDylibDeinitializerSequence =
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std::vector<ELFNixJITDylibDeinitializers>;
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enum dlopen_mode : int {
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ORC_RT_RTLD_LAZY = 0x1,
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ORC_RT_RTLD_NOW = 0x2,
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ORC_RT_RTLD_LOCAL = 0x4,
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ORC_RT_RTLD_GLOBAL = 0x8
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};
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} // end namespace elfnix
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using SPSELFNixPerObjectSectionsToRegister =
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SPSTuple<SPSExecutorAddrRange, SPSExecutorAddrRange>;
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template <>
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class SPSSerializationTraits<SPSELFNixPerObjectSectionsToRegister,
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elfnix::ELFNixPerObjectSectionsToRegister> {
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public:
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static size_t size(const elfnix::ELFNixPerObjectSectionsToRegister &MOPOSR) {
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return SPSELFNixPerObjectSectionsToRegister::AsArgList::size(
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MOPOSR.EHFrameSection, MOPOSR.ThreadDataSection);
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}
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static bool
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serialize(SPSOutputBuffer &OB,
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const elfnix::ELFNixPerObjectSectionsToRegister &MOPOSR) {
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return SPSELFNixPerObjectSectionsToRegister::AsArgList::serialize(
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OB, MOPOSR.EHFrameSection, MOPOSR.ThreadDataSection);
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}
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static bool deserialize(SPSInputBuffer &IB,
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elfnix::ELFNixPerObjectSectionsToRegister &MOPOSR) {
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return SPSELFNixPerObjectSectionsToRegister::AsArgList::deserialize(
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IB, MOPOSR.EHFrameSection, MOPOSR.ThreadDataSection);
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}
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};
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using SPSNamedExecutorAddrRangeSequenceMap =
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SPSSequence<SPSTuple<SPSString, SPSExecutorAddrRangeSequence>>;
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using SPSELFNixJITDylibInitializers =
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SPSTuple<SPSString, SPSExecutorAddr, SPSNamedExecutorAddrRangeSequenceMap>;
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using SPSELFNixJITDylibInitializerSequence =
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SPSSequence<SPSELFNixJITDylibInitializers>;
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/// Serialization traits for ELFNixJITDylibInitializers.
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template <>
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class SPSSerializationTraits<SPSELFNixJITDylibInitializers,
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elfnix::ELFNixJITDylibInitializers> {
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public:
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static size_t size(const elfnix::ELFNixJITDylibInitializers &MOJDIs) {
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return SPSELFNixJITDylibInitializers::AsArgList::size(
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MOJDIs.Name, MOJDIs.DSOHandleAddress, MOJDIs.InitSections);
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}
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static bool serialize(SPSOutputBuffer &OB,
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const elfnix::ELFNixJITDylibInitializers &MOJDIs) {
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return SPSELFNixJITDylibInitializers::AsArgList::serialize(
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OB, MOJDIs.Name, MOJDIs.DSOHandleAddress, MOJDIs.InitSections);
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}
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static bool deserialize(SPSInputBuffer &IB,
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elfnix::ELFNixJITDylibInitializers &MOJDIs) {
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return SPSELFNixJITDylibInitializers::AsArgList::deserialize(
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IB, MOJDIs.Name, MOJDIs.DSOHandleAddress, MOJDIs.InitSections);
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}
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};
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} // end namespace __orc_rt
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#endif // ORC_RT_ELFNIX_PLATFORM_H
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