unittests/Process/Utility/RegisterContextNetBSDTest_i386.cpp

//===-- RegisterContextNetBSDTest_i386.cpp --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#if defined(__i386__) || defined(__x86_64__)

// clang-format off
#include <sys/types.h>
#include <i386/reg.h>
// clang-format on

#include "gmock/gmock.h"
#include "gtest/gtest.h"

#include "Plugins/Process/Utility/lldb-x86-register-enums.h"
#include "Plugins/Process/Utility/RegisterContextNetBSD_i386.h"

using namespace lldb;
using namespace lldb_private;

static std::pair<size_t, size_t> GetRegParams(RegisterInfoInterface &ctx,
                                              uint32_t reg) {
  const RegisterInfo &info = ctx.GetRegisterInfo()[reg];
  return {info.byte_offset, info.byte_size};
}

#define EXPECT_OFF(regname, offset, size)                                      \
  EXPECT_THAT(GetRegParams(reg_ctx, lldb_##regname),                           \
              ::testing::Pair(offset + base_offset, size))

#define EXPECT_GPR_I386(regname)                                               \
  EXPECT_THAT(GetRegParams(reg_ctx, lldb_##regname##_i386),                    \
              ::testing::Pair(offsetof(reg, r_##regname),         \
                              sizeof(reg::r_##regname)))
#define EXPECT_DBR_I386(num)                                                   \
  EXPECT_OFF(dr##num##_i386, offsetof(dbreg, dr[num]),            \
             sizeof(dbreg::dr[num]))

TEST(RegisterContextNetBSDTest, i386) {
  ArchSpec arch{"i686-unknown-netbsd"};
  RegisterContextNetBSD_i386 reg_ctx{arch};

  EXPECT_GPR_I386(eax);
  EXPECT_GPR_I386(ecx);
  EXPECT_GPR_I386(edx);
  EXPECT_GPR_I386(ebx);
  EXPECT_GPR_I386(esp);
  EXPECT_GPR_I386(ebp);
  EXPECT_GPR_I386(esi);
  EXPECT_GPR_I386(edi);
  EXPECT_GPR_I386(eip);
  EXPECT_GPR_I386(eflags);
  EXPECT_GPR_I386(cs);
  EXPECT_GPR_I386(ss);
  EXPECT_GPR_I386(ds);
  EXPECT_GPR_I386(es);
  EXPECT_GPR_I386(fs);
  EXPECT_GPR_I386(gs);

  // fctrl is the first FPR field, it is used to determine offset of the whole
  // FPR struct
  size_t base_offset = reg_ctx.GetRegisterInfo()[lldb_fctrl_i386].byte_offset;

  // assert against FXSAVE struct
  EXPECT_OFF(fctrl_i386, 0x00, 2);
  EXPECT_OFF(fstat_i386, 0x02, 2);
  // TODO: This is a known bug, abridged ftag should is 8 bits in length.
  EXPECT_OFF(ftag_i386, 0x04, 2);
  EXPECT_OFF(fop_i386, 0x06, 2);
  // NB: Technically fiseg/foseg are 16-bit long and the higher 16 bits
  // are reserved.  However, we use them to access/recombine 64-bit FIP/FDP.
  EXPECT_OFF(fioff_i386, 0x08, 4);
  EXPECT_OFF(fiseg_i386, 0x0C, 4);
  EXPECT_OFF(fooff_i386, 0x10, 4);
  EXPECT_OFF(foseg_i386, 0x14, 4);
  EXPECT_OFF(mxcsr_i386, 0x18, 4);
  EXPECT_OFF(mxcsrmask_i386, 0x1C, 4);
  EXPECT_OFF(st0_i386, 0x20, 10);
  EXPECT_OFF(st1_i386, 0x30, 10);
  EXPECT_OFF(st2_i386, 0x40, 10);
  EXPECT_OFF(st3_i386, 0x50, 10);
  EXPECT_OFF(st4_i386, 0x60, 10);
  EXPECT_OFF(st5_i386, 0x70, 10);
  EXPECT_OFF(st6_i386, 0x80, 10);
  EXPECT_OFF(st7_i386, 0x90, 10);
  EXPECT_OFF(mm0_i386, 0x20, 8);
  EXPECT_OFF(mm1_i386, 0x30, 8);
  EXPECT_OFF(mm2_i386, 0x40, 8);
  EXPECT_OFF(mm3_i386, 0x50, 8);
  EXPECT_OFF(mm4_i386, 0x60, 8);
  EXPECT_OFF(mm5_i386, 0x70, 8);
  EXPECT_OFF(mm6_i386, 0x80, 8);
  EXPECT_OFF(mm7_i386, 0x90, 8);
  EXPECT_OFF(xmm0_i386, 0xA0, 16);
  EXPECT_OFF(xmm1_i386, 0xB0, 16);
  EXPECT_OFF(xmm2_i386, 0xC0, 16);
  EXPECT_OFF(xmm3_i386, 0xD0, 16);
  EXPECT_OFF(xmm4_i386, 0xE0, 16);
  EXPECT_OFF(xmm5_i386, 0xF0, 16);
  EXPECT_OFF(xmm6_i386, 0x100, 16);
  EXPECT_OFF(xmm7_i386, 0x110, 16);

  base_offset = reg_ctx.GetRegisterInfo()[lldb_dr0_i386].byte_offset;
  EXPECT_DBR_I386(0);
  EXPECT_DBR_I386(1);
  EXPECT_DBR_I386(2);
  EXPECT_DBR_I386(3);
  EXPECT_DBR_I386(4);
  EXPECT_DBR_I386(5);
  EXPECT_DBR_I386(6);
  EXPECT_DBR_I386(7);
}

#endif // defined(__i386__) || defined(__x86_64__)