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

   1 //===---------- RISC-V vdso configuration -------------------------* C++ *-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 #ifndef LLVM_LIBC_SRC___SUPPORT_OSUTIL_LINUX_RISCV_VDSO_H
   9 #define LLVM_LIBC_SRC___SUPPORT_OSUTIL_LINUX_RISCV_VDSO_H
  10 #include "src/__support/CPP/string_view.h"
  11 #include "src/__support/OSUtil/linux/vdso_sym.h"
  12 namespace LIBC_NAMESPACE_DECL {
  13 namespace vdso {
  14 // translate VDSOSym to symbol names
  15 // https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/riscv/kernel/vdso/vdso.lds.S
  16 LIBC_INLINE constexpr cpp::string_view symbol_name(VDSOSym sym) {
  17   switch (sym) {
  18   case VDSOSym::RTSigReturn:
  19     return "__vdso_rt_sigreturn";
  20   case VDSOSym::GetTimeOfDay:
  21     return "__vdso_gettimeofday";
  22   case VDSOSym::ClockGetTime:
  23     return "__vdso_clock_gettime";
  24   case VDSOSym::ClockGetRes:
  25     return "__vdso_clock_getres";
  26   case VDSOSym::GetCpu:
  27     return "__vdso_getcpu";
  28   case VDSOSym::FlushICache:
  29     return "__vdso_flush_icache";
  30   case VDSOSym::RiscvHwProbe:
  31     return "__vdso_riscv_hwprobe";
  32   default:
  33     return "";
  34   }
  35 }
  36
  37 // symbol versions
  38 LIBC_INLINE constexpr cpp::string_view symbol_version(VDSOSym) {
  39   return "LINUX_4.15";
  40 }
  41 } // namespace vdso
  42 } // namespace LIBC_NAMESPACE_DECL
  43 #endif // LLVM_LIBC_SRC___SUPPORT_OSUTIL_LINUX_RISCV_VDSO_H