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SchrodingerZhuSchrodingerZhu
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[libc] implement vdso
1 parent 62b5b61 commit 3c30e8f

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14 files changed

+496
-0
lines changed

14 files changed

+496
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lines changed

‎libc/src/__support/OSUtil/CMakeLists.txt

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@@ -15,3 +15,11 @@ add_object_library(
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DEPENDS
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${target_os_util}
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)
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add_header_library(
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vdso
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HDRS
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vdso.h
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DEPENDS
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.${LIBC_TARGET_OS}.vdso
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)

‎libc/src/__support/OSUtil/fuchsia/vdso.h

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//===------------- Fuchsia VDSO Header --------------------------*- 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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#ifndef LLVM_LIBC_SRC___SUPPORT_OSUTIL_FUCHSIA_VDSO_H
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#define LLVM_LIBC_SRC___SUPPORT_OSUTIL_FUCHSIA_VDSO_H
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/// TODO: implement fuchsia VDSO
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/// https://fuchsia.dev/fuchsia-src/concepts/kernel/vdso
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#endif // LLVM_LIBC_SRC___SUPPORT_OSUTIL_FUCHSIA_VDSO_H

‎libc/src/__support/OSUtil/linux/CMakeLists.txt

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@@ -16,3 +16,19 @@ add_object_library(
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libc.src.__support.common
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libc.src.__support.CPP.string_view
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)
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add_object_library(
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vdso
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HDRS
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vdso.h
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SRCS
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vdso.cpp
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DEPENDS
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.${LIBC_TARGET_ARCHITECTURE}.vdso
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libc.src.__support.CPP.array
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libc.src.__support.CPP.string_view
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libc.src.__support.threads.callonce
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libc.src.__support.threads.linux.futex_word_type
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libc.src.errno.errno
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libc.src.sys.auxv.getauxval
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)

‎libc/src/__support/OSUtil/linux/aarch64/CMakeLists.txt

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@@ -5,3 +5,12 @@ add_header_library(
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DEPENDS
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libc.src.__support.common
77
)
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add_header_library(
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vdso
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HDRS
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vdso.h
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DEPENDS
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libc.src.__support.common
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libc.src.__support.CPP.string_view
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)

‎libc/src/__support/OSUtil/linux/aarch64/vdso.h

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//===---------- aarch64 vdso configuration ------------------------* 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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#include "src/__support/CPP/string_view.h"
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namespace LIBC_NAMESPACE {
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namespace vdso {
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// macro definitions
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#define LIBC_VDSO_HAS_RT_SIGRETURN
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#define LIBC_VDSO_HAS_GETTIMEOFDAY
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#define LIBC_VDSO_HAS_CLOCK_GETTIME
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#define LIBC_VDSO_HAS_CLOCK_GETRES
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// list of VDSO symbols
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enum class VDSOSym {
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RTSigReturn,
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GetTimeOfDay,
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ClockGetTime,
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ClockGetRes,
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VDSOSymCount
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};
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// translate VDSOSym to symbol names
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LIBC_INLINE constexpr cpp::string_view symbol_name(VDSOSym sym) {
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switch (sym) {
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case VDSOSym::RTSigReturn:
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return "__kernel_rt_sigreturn";
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case VDSOSym::GetTimeOfDay:
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return "__kernel_gettimeofday";
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case VDSOSym::ClockGetTime:
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return "__kernel_clock_gettime";
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case VDSOSym::ClockGetRes:
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return "__kernel_clock_getres";
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default:
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return "";
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}
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}
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// symbol versions
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LIBC_INLINE constexpr cpp::string_view symbol_version(VDSOSym) {
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return "LINUX_2.6.39";
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}
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} // namespace vdso
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} // namespace LIBC_NAMESPACE

‎libc/src/__support/OSUtil/linux/arm/CMakeLists.txt

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@@ -5,3 +5,12 @@ add_header_library(
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DEPENDS
66
libc.src.__support.common
77
)
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add_header_library(
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vdso
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HDRS
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vdso.h
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DEPENDS
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libc.src.__support.common
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libc.src.__support.CPP.string_view
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)

‎libc/src/__support/OSUtil/linux/arm/vdso.h

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//===---------- arm vdso configuration ----------------------------* 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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#include "src/__support/CPP/string_view.h"
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namespace LIBC_NAMESPACE {
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namespace vdso {
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// macro definitions
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#define LIBC_VDSO_HAS_GETTIMEOFDAY
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#define LIBC_VDSO_HAS_CLOCK_GETTIME
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// list of VDSO symbols
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enum class VDSOSym {
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GetTimeOfDay,
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ClockGetTime,
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};
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// translate VDSOSym to symbol names
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LIBC_INLINE constexpr cpp::string_view symbol_name(VDSOSym sym) {
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switch (sym) {
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case VDSOSym::GetTimeOfDay:
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return "__vdso_gettimeofday";
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case VDSOSym::ClockGetTime:
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return "__vdso_clock_gettime";
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}
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}
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// symbol versions
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LIBC_INLINE constexpr cpp::string_view symbol_version(VDSOSym) {
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return "LINUX_2.6";
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}
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} // namespace vdso
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} // namespace LIBC_NAMESPACE

‎libc/src/__support/OSUtil/linux/riscv/CMakeLists.txt

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@@ -5,3 +5,12 @@ add_header_library(
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DEPENDS
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libc.src.__support.common
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)
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add_header_library(
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vdso
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HDRS
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vdso.h
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DEPENDS
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libc.src.__support.common
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libc.src.__support.CPP.string_view
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)

‎libc/src/__support/OSUtil/linux/riscv/vdso.h

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//===---------- RISC-V vdso configuration -------------------------* 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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#include "src/__support/CPP/string_view.h"
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namespace LIBC_NAMESPACE {
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namespace vdso {
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// macro definitions
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#define LIBC_VDSO_HAS_RT_SIGRETURN
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#define LIBC_VDSO_HAS_GETTIMEOFDAY
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#define LIBC_VDSO_HAS_CLOCK_GETTIME
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#define LIBC_VDSO_HAS_CLOCK_GETRES
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#define LIBC_VDSO_HAS_GETCPU
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#define LIBC_VDSO_HAS_FLUSH_ICACHE
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// list of VDSO symbols
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enum class VDSOSym {
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RTSigReturn,
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GetTimeOfDay,
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ClockGetTime,
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ClockGetRes,
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GetCpu,
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FlushICache,
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VDSOSymCount
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};
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// translate VDSOSym to symbol names
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LIBC_INLINE constexpr cpp::string_view symbol_name(VDSOSym sym) {
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switch (sym) {
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case VDSOSym::RTSigReturn:
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return "__vdso_rt_sigreturn";
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case VDSOSym::GetTimeOfDay:
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return "__vdso_gettimeofday";
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case VDSOSym::ClockGetTime:
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return "__vdso_clock_gettime";
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case VDSOSym::ClockGetRes:
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return "__vdso_clock_getres";
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case VDSOSym::GetCpu:
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return "__vdso_getcpu";
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case VDSOSym::FlushICache:
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return "__vdso_flush_icache";
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default:
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return "";
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}
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}
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// symbol versions
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LIBC_INLINE constexpr cpp::string_view symbol_version(VDSOSym) {
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return "LINUX_4.15";
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}
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} // namespace vdso
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} // namespace LIBC_NAMESPACE

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