contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextPOSIX_x86.cpp

   1 //===-- RegisterContextPOSIX_x86.cpp ----------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include <cstring>
  11 #include <errno.h>
  12 #include <stdint.h>
  13
  14 #include "lldb/Target/Process.h"
  15 #include "lldb/Target/Target.h"
  16 #include "lldb/Target/Thread.h"
  17 #include "lldb/Utility/DataBufferHeap.h"
  18 #include "lldb/Utility/DataExtractor.h"
  19 #include "lldb/Utility/Endian.h"
  20 #include "lldb/Utility/RegisterValue.h"
  21 #include "lldb/Utility/Scalar.h"
  22 #include "llvm/Support/Compiler.h"
  23
  24 #include "RegisterContextPOSIX_x86.h"
  25 #include "RegisterContext_x86.h"
  26
  27 using namespace lldb_private;
  28 using namespace lldb;
  29
  30 const uint32_t g_gpr_regnums_i386[] = {
  31     lldb_eax_i386,       lldb_ebx_i386,    lldb_ecx_i386, lldb_edx_i386,
  32     lldb_edi_i386,       lldb_esi_i386,    lldb_ebp_i386, lldb_esp_i386,
  33     lldb_eip_i386,       lldb_eflags_i386, lldb_cs_i386,  lldb_fs_i386,
  34     lldb_gs_i386,        lldb_ss_i386,     lldb_ds_i386,  lldb_es_i386,
  35     lldb_ax_i386,        lldb_bx_i386,     lldb_cx_i386,  lldb_dx_i386,
  36     lldb_di_i386,        lldb_si_i386,     lldb_bp_i386,  lldb_sp_i386,
  37     lldb_ah_i386,        lldb_bh_i386,     lldb_ch_i386,  lldb_dh_i386,
  38     lldb_al_i386,        lldb_bl_i386,     lldb_cl_i386,  lldb_dl_i386,
  39     LLDB_INVALID_REGNUM, // Register sets must be terminated with
  40                          // LLDB_INVALID_REGNUM.
  41 };
  42 static_assert((sizeof(g_gpr_regnums_i386) / sizeof(g_gpr_regnums_i386[0])) -
  43                       1 ==
  44                   k_num_gpr_registers_i386,
  45               "g_gpr_regnums_i386 has wrong number of register infos");
  46
  47 const uint32_t g_lldb_regnums_i386[] = {
  48     lldb_fctrl_i386,    lldb_fstat_i386,     lldb_ftag_i386,  lldb_fop_i386,
  49     lldb_fiseg_i386,    lldb_fioff_i386,     lldb_foseg_i386, lldb_fooff_i386,
  50     lldb_mxcsr_i386,    lldb_mxcsrmask_i386, lldb_st0_i386,   lldb_st1_i386,
  51     lldb_st2_i386,      lldb_st3_i386,       lldb_st4_i386,   lldb_st5_i386,
  52     lldb_st6_i386,      lldb_st7_i386,       lldb_mm0_i386,   lldb_mm1_i386,
  53     lldb_mm2_i386,      lldb_mm3_i386,       lldb_mm4_i386,   lldb_mm5_i386,
  54     lldb_mm6_i386,      lldb_mm7_i386,       lldb_xmm0_i386,  lldb_xmm1_i386,
  55     lldb_xmm2_i386,     lldb_xmm3_i386,      lldb_xmm4_i386,  lldb_xmm5_i386,
  56     lldb_xmm6_i386,     lldb_xmm7_i386,
  57     LLDB_INVALID_REGNUM // Register sets must be terminated with
  58                         // LLDB_INVALID_REGNUM.
  59 };
  60 static_assert((sizeof(g_lldb_regnums_i386) / sizeof(g_lldb_regnums_i386[0])) -
  61                       1 ==
  62                   k_num_fpr_registers_i386,
  63               "g_lldb_regnums_i386 has wrong number of register infos");
  64
  65 const uint32_t g_avx_regnums_i386[] = {
  66     lldb_ymm0_i386,     lldb_ymm1_i386, lldb_ymm2_i386, lldb_ymm3_i386,
  67     lldb_ymm4_i386,     lldb_ymm5_i386, lldb_ymm6_i386, lldb_ymm7_i386,
  68     LLDB_INVALID_REGNUM // Register sets must be terminated with
  69                         // LLDB_INVALID_REGNUM.
  70 };
  71 static_assert((sizeof(g_avx_regnums_i386) / sizeof(g_avx_regnums_i386[0])) -
  72                       1 ==
  73                   k_num_avx_registers_i386,
  74               " g_avx_regnums_i386 has wrong number of register infos");
  75
  76 static const uint32_t g_gpr_regnums_x86_64[] = {
  77     lldb_rax_x86_64,    lldb_rbx_x86_64,    lldb_rcx_x86_64, lldb_rdx_x86_64,
  78     lldb_rdi_x86_64,    lldb_rsi_x86_64,    lldb_rbp_x86_64, lldb_rsp_x86_64,
  79     lldb_r8_x86_64,     lldb_r9_x86_64,     lldb_r10_x86_64, lldb_r11_x86_64,
  80     lldb_r12_x86_64,    lldb_r13_x86_64,    lldb_r14_x86_64, lldb_r15_x86_64,
  81     lldb_rip_x86_64,    lldb_rflags_x86_64, lldb_cs_x86_64,  lldb_fs_x86_64,
  82     lldb_gs_x86_64,     lldb_ss_x86_64,     lldb_ds_x86_64,  lldb_es_x86_64,
  83     lldb_eax_x86_64,    lldb_ebx_x86_64,    lldb_ecx_x86_64, lldb_edx_x86_64,
  84     lldb_edi_x86_64,    lldb_esi_x86_64,    lldb_ebp_x86_64, lldb_esp_x86_64,
  85     lldb_r8d_x86_64,  // Low 32 bits or r8
  86     lldb_r9d_x86_64,  // Low 32 bits or r9
  87     lldb_r10d_x86_64, // Low 32 bits or r10
  88     lldb_r11d_x86_64, // Low 32 bits or r11
  89     lldb_r12d_x86_64, // Low 32 bits or r12
  90     lldb_r13d_x86_64, // Low 32 bits or r13
  91     lldb_r14d_x86_64, // Low 32 bits or r14
  92     lldb_r15d_x86_64, // Low 32 bits or r15
  93     lldb_ax_x86_64,     lldb_bx_x86_64,     lldb_cx_x86_64,  lldb_dx_x86_64,
  94     lldb_di_x86_64,     lldb_si_x86_64,     lldb_bp_x86_64,  lldb_sp_x86_64,
  95     lldb_r8w_x86_64,  // Low 16 bits or r8
  96     lldb_r9w_x86_64,  // Low 16 bits or r9
  97     lldb_r10w_x86_64, // Low 16 bits or r10
  98     lldb_r11w_x86_64, // Low 16 bits or r11
  99     lldb_r12w_x86_64, // Low 16 bits or r12
 100     lldb_r13w_x86_64, // Low 16 bits or r13
 101     lldb_r14w_x86_64, // Low 16 bits or r14
 102     lldb_r15w_x86_64, // Low 16 bits or r15
 103     lldb_ah_x86_64,     lldb_bh_x86_64,     lldb_ch_x86_64,  lldb_dh_x86_64,
 104     lldb_al_x86_64,     lldb_bl_x86_64,     lldb_cl_x86_64,  lldb_dl_x86_64,
 105     lldb_dil_x86_64,    lldb_sil_x86_64,    lldb_bpl_x86_64, lldb_spl_x86_64,
 106     lldb_r8l_x86_64,    // Low 8 bits or r8
 107     lldb_r9l_x86_64,    // Low 8 bits or r9
 108     lldb_r10l_x86_64,   // Low 8 bits or r10
 109     lldb_r11l_x86_64,   // Low 8 bits or r11
 110     lldb_r12l_x86_64,   // Low 8 bits or r12
 111     lldb_r13l_x86_64,   // Low 8 bits or r13
 112     lldb_r14l_x86_64,   // Low 8 bits or r14
 113     lldb_r15l_x86_64,   // Low 8 bits or r15
 114     LLDB_INVALID_REGNUM // Register sets must be terminated with
 115                         // LLDB_INVALID_REGNUM.
 116 };
 117 static_assert((sizeof(g_gpr_regnums_x86_64) / sizeof(g_gpr_regnums_x86_64[0])) -
 118                       1 ==
 119                   k_num_gpr_registers_x86_64,
 120               "g_gpr_regnums_x86_64 has wrong number of register infos");
 121
 122 static const uint32_t g_lldb_regnums_x86_64[] = {
 123     lldb_fctrl_x86_64,     lldb_fstat_x86_64, lldb_ftag_x86_64,
 124     lldb_fop_x86_64,       lldb_fiseg_x86_64, lldb_fioff_x86_64,
 125     lldb_foseg_x86_64,     lldb_fooff_x86_64, lldb_mxcsr_x86_64,
 126     lldb_mxcsrmask_x86_64, lldb_st0_x86_64,   lldb_st1_x86_64,
 127     lldb_st2_x86_64,       lldb_st3_x86_64,   lldb_st4_x86_64,
 128     lldb_st5_x86_64,       lldb_st6_x86_64,   lldb_st7_x86_64,
 129     lldb_mm0_x86_64,       lldb_mm1_x86_64,   lldb_mm2_x86_64,
 130     lldb_mm3_x86_64,       lldb_mm4_x86_64,   lldb_mm5_x86_64,
 131     lldb_mm6_x86_64,       lldb_mm7_x86_64,   lldb_xmm0_x86_64,
 132     lldb_xmm1_x86_64,      lldb_xmm2_x86_64,  lldb_xmm3_x86_64,
 133     lldb_xmm4_x86_64,      lldb_xmm5_x86_64,  lldb_xmm6_x86_64,
 134     lldb_xmm7_x86_64,      lldb_xmm8_x86_64,  lldb_xmm9_x86_64,
 135     lldb_xmm10_x86_64,     lldb_xmm11_x86_64, lldb_xmm12_x86_64,
 136     lldb_xmm13_x86_64,     lldb_xmm14_x86_64, lldb_xmm15_x86_64,
 137     LLDB_INVALID_REGNUM // Register sets must be terminated with
 138                         // LLDB_INVALID_REGNUM.
 139 };
 140 static_assert((sizeof(g_lldb_regnums_x86_64) /
 141                sizeof(g_lldb_regnums_x86_64[0])) -
 142                       1 ==
 143                   k_num_fpr_registers_x86_64,
 144               "g_lldb_regnums_x86_64 has wrong number of register infos");
 145
 146 static const uint32_t g_avx_regnums_x86_64[] = {
 147     lldb_ymm0_x86_64,   lldb_ymm1_x86_64,  lldb_ymm2_x86_64,  lldb_ymm3_x86_64,
 148     lldb_ymm4_x86_64,   lldb_ymm5_x86_64,  lldb_ymm6_x86_64,  lldb_ymm7_x86_64,
 149     lldb_ymm8_x86_64,   lldb_ymm9_x86_64,  lldb_ymm10_x86_64, lldb_ymm11_x86_64,
 150     lldb_ymm12_x86_64,  lldb_ymm13_x86_64, lldb_ymm14_x86_64, lldb_ymm15_x86_64,
 151     LLDB_INVALID_REGNUM // Register sets must be terminated with
 152                         // LLDB_INVALID_REGNUM.
 153 };
 154 static_assert((sizeof(g_avx_regnums_x86_64) / sizeof(g_avx_regnums_x86_64[0])) -
 155                       1 ==
 156                   k_num_avx_registers_x86_64,
 157               "g_avx_regnums_x86_64 has wrong number of register infos");
 158
 159 uint32_t RegisterContextPOSIX_x86::g_contained_eax[] = {lldb_eax_i386,
 160                                                         LLDB_INVALID_REGNUM};
 161 uint32_t RegisterContextPOSIX_x86::g_contained_ebx[] = {lldb_ebx_i386,
 162                                                         LLDB_INVALID_REGNUM};
 163 uint32_t RegisterContextPOSIX_x86::g_contained_ecx[] = {lldb_ecx_i386,
 164                                                         LLDB_INVALID_REGNUM};
 165 uint32_t RegisterContextPOSIX_x86::g_contained_edx[] = {lldb_edx_i386,
 166                                                         LLDB_INVALID_REGNUM};
 167 uint32_t RegisterContextPOSIX_x86::g_contained_edi[] = {lldb_edi_i386,
 168                                                         LLDB_INVALID_REGNUM};
 169 uint32_t RegisterContextPOSIX_x86::g_contained_esi[] = {lldb_esi_i386,
 170                                                         LLDB_INVALID_REGNUM};
 171 uint32_t RegisterContextPOSIX_x86::g_contained_ebp[] = {lldb_ebp_i386,
 172                                                         LLDB_INVALID_REGNUM};
 173 uint32_t RegisterContextPOSIX_x86::g_contained_esp[] = {lldb_esp_i386,
 174                                                         LLDB_INVALID_REGNUM};
 175
 176 uint32_t RegisterContextPOSIX_x86::g_invalidate_eax[] = {
 177     lldb_eax_i386, lldb_ax_i386, lldb_ah_i386, lldb_al_i386,
 178     LLDB_INVALID_REGNUM};
 179 uint32_t RegisterContextPOSIX_x86::g_invalidate_ebx[] = {
 180     lldb_ebx_i386, lldb_bx_i386, lldb_bh_i386, lldb_bl_i386,
 181     LLDB_INVALID_REGNUM};
 182 uint32_t RegisterContextPOSIX_x86::g_invalidate_ecx[] = {
 183     lldb_ecx_i386, lldb_cx_i386, lldb_ch_i386, lldb_cl_i386,
 184     LLDB_INVALID_REGNUM};
 185 uint32_t RegisterContextPOSIX_x86::g_invalidate_edx[] = {
 186     lldb_edx_i386, lldb_dx_i386, lldb_dh_i386, lldb_dl_i386,
 187     LLDB_INVALID_REGNUM};
 188 uint32_t RegisterContextPOSIX_x86::g_invalidate_edi[] = {
 189     lldb_edi_i386, lldb_di_i386, LLDB_INVALID_REGNUM};
 190 uint32_t RegisterContextPOSIX_x86::g_invalidate_esi[] = {
 191     lldb_esi_i386, lldb_si_i386, LLDB_INVALID_REGNUM};
 192 uint32_t RegisterContextPOSIX_x86::g_invalidate_ebp[] = {
 193     lldb_ebp_i386, lldb_bp_i386, LLDB_INVALID_REGNUM};
 194 uint32_t RegisterContextPOSIX_x86::g_invalidate_esp[] = {
 195     lldb_esp_i386, lldb_sp_i386, LLDB_INVALID_REGNUM};
 196
 197 uint32_t RegisterContextPOSIX_x86::g_contained_rax[] = {lldb_rax_x86_64,
 198                                                         LLDB_INVALID_REGNUM};
 199 uint32_t RegisterContextPOSIX_x86::g_contained_rbx[] = {lldb_rbx_x86_64,
 200                                                         LLDB_INVALID_REGNUM};
 201 uint32_t RegisterContextPOSIX_x86::g_contained_rcx[] = {lldb_rcx_x86_64,
 202                                                         LLDB_INVALID_REGNUM};
 203 uint32_t RegisterContextPOSIX_x86::g_contained_rdx[] = {lldb_rdx_x86_64,
 204                                                         LLDB_INVALID_REGNUM};
 205 uint32_t RegisterContextPOSIX_x86::g_contained_rdi[] = {lldb_rdi_x86_64,
 206                                                         LLDB_INVALID_REGNUM};
 207 uint32_t RegisterContextPOSIX_x86::g_contained_rsi[] = {lldb_rsi_x86_64,
 208                                                         LLDB_INVALID_REGNUM};
 209 uint32_t RegisterContextPOSIX_x86::g_contained_rbp[] = {lldb_rbp_x86_64,
 210                                                         LLDB_INVALID_REGNUM};
 211 uint32_t RegisterContextPOSIX_x86::g_contained_rsp[] = {lldb_rsp_x86_64,
 212                                                         LLDB_INVALID_REGNUM};
 213 uint32_t RegisterContextPOSIX_x86::g_contained_r8[] = {lldb_r8_x86_64,
 214                                                        LLDB_INVALID_REGNUM};
 215 uint32_t RegisterContextPOSIX_x86::g_contained_r9[] = {lldb_r9_x86_64,
 216                                                        LLDB_INVALID_REGNUM};
 217 uint32_t RegisterContextPOSIX_x86::g_contained_r10[] = {lldb_r10_x86_64,
 218                                                         LLDB_INVALID_REGNUM};
 219 uint32_t RegisterContextPOSIX_x86::g_contained_r11[] = {lldb_r11_x86_64,
 220                                                         LLDB_INVALID_REGNUM};
 221 uint32_t RegisterContextPOSIX_x86::g_contained_r12[] = {lldb_r12_x86_64,
 222                                                         LLDB_INVALID_REGNUM};
 223 uint32_t RegisterContextPOSIX_x86::g_contained_r13[] = {lldb_r13_x86_64,
 224                                                         LLDB_INVALID_REGNUM};
 225 uint32_t RegisterContextPOSIX_x86::g_contained_r14[] = {lldb_r14_x86_64,
 226                                                         LLDB_INVALID_REGNUM};
 227 uint32_t RegisterContextPOSIX_x86::g_contained_r15[] = {lldb_r15_x86_64,
 228                                                         LLDB_INVALID_REGNUM};
 229
 230 uint32_t RegisterContextPOSIX_x86::g_invalidate_rax[] = {
 231     lldb_rax_x86_64, lldb_eax_x86_64, lldb_ax_x86_64,
 232     lldb_ah_x86_64,  lldb_al_x86_64,  LLDB_INVALID_REGNUM};
 233 uint32_t RegisterContextPOSIX_x86::g_invalidate_rbx[] = {
 234     lldb_rbx_x86_64, lldb_ebx_x86_64, lldb_bx_x86_64,
 235     lldb_bh_x86_64,  lldb_bl_x86_64,  LLDB_INVALID_REGNUM};
 236 uint32_t RegisterContextPOSIX_x86::g_invalidate_rcx[] = {
 237     lldb_rcx_x86_64, lldb_ecx_x86_64, lldb_cx_x86_64,
 238     lldb_ch_x86_64,  lldb_cl_x86_64,  LLDB_INVALID_REGNUM};
 239 uint32_t RegisterContextPOSIX_x86::g_invalidate_rdx[] = {
 240     lldb_rdx_x86_64, lldb_edx_x86_64, lldb_dx_x86_64,
 241     lldb_dh_x86_64,  lldb_dl_x86_64,  LLDB_INVALID_REGNUM};
 242 uint32_t RegisterContextPOSIX_x86::g_invalidate_rdi[] = {
 243     lldb_rdi_x86_64, lldb_edi_x86_64, lldb_di_x86_64, lldb_dil_x86_64,
 244     LLDB_INVALID_REGNUM};
 245 uint32_t RegisterContextPOSIX_x86::g_invalidate_rsi[] = {
 246     lldb_rsi_x86_64, lldb_esi_x86_64, lldb_si_x86_64, lldb_sil_x86_64,
 247     LLDB_INVALID_REGNUM};
 248 uint32_t RegisterContextPOSIX_x86::g_invalidate_rbp[] = {
 249     lldb_rbp_x86_64, lldb_ebp_x86_64, lldb_bp_x86_64, lldb_bpl_x86_64,
 250     LLDB_INVALID_REGNUM};
 251 uint32_t RegisterContextPOSIX_x86::g_invalidate_rsp[] = {
 252     lldb_rsp_x86_64, lldb_esp_x86_64, lldb_sp_x86_64, lldb_spl_x86_64,
 253     LLDB_INVALID_REGNUM};
 254 uint32_t RegisterContextPOSIX_x86::g_invalidate_r8[] = {
 255     lldb_r8_x86_64, lldb_r8d_x86_64, lldb_r8w_x86_64, lldb_r8l_x86_64,
 256     LLDB_INVALID_REGNUM};
 257 uint32_t RegisterContextPOSIX_x86::g_invalidate_r9[] = {
 258     lldb_r9_x86_64, lldb_r9d_x86_64, lldb_r9w_x86_64, lldb_r9l_x86_64,
 259     LLDB_INVALID_REGNUM};
 260 uint32_t RegisterContextPOSIX_x86::g_invalidate_r10[] = {
 261     lldb_r10_x86_64, lldb_r10d_x86_64, lldb_r10w_x86_64, lldb_r10l_x86_64,
 262     LLDB_INVALID_REGNUM};
 263 uint32_t RegisterContextPOSIX_x86::g_invalidate_r11[] = {
 264     lldb_r11_x86_64, lldb_r11d_x86_64, lldb_r11w_x86_64, lldb_r11l_x86_64,
 265     LLDB_INVALID_REGNUM};
 266 uint32_t RegisterContextPOSIX_x86::g_invalidate_r12[] = {
 267     lldb_r12_x86_64, lldb_r12d_x86_64, lldb_r12w_x86_64, lldb_r12l_x86_64,
 268     LLDB_INVALID_REGNUM};
 269 uint32_t RegisterContextPOSIX_x86::g_invalidate_r13[] = {
 270     lldb_r13_x86_64, lldb_r13d_x86_64, lldb_r13w_x86_64, lldb_r13l_x86_64,
 271     LLDB_INVALID_REGNUM};
 272 uint32_t RegisterContextPOSIX_x86::g_invalidate_r14[] = {
 273     lldb_r14_x86_64, lldb_r14d_x86_64, lldb_r14w_x86_64, lldb_r14l_x86_64,
 274     LLDB_INVALID_REGNUM};
 275 uint32_t RegisterContextPOSIX_x86::g_invalidate_r15[] = {
 276     lldb_r15_x86_64, lldb_r15d_x86_64, lldb_r15w_x86_64, lldb_r15l_x86_64,
 277     LLDB_INVALID_REGNUM};
 278
 279 // Number of register sets provided by this context.
 280 enum { k_num_extended_register_sets = 1, k_num_register_sets = 3 };
 281
 282 static const RegisterSet g_reg_sets_i386[k_num_register_sets] = {
 283     {"General Purpose Registers", "gpr", k_num_gpr_registers_i386,
 284      g_gpr_regnums_i386},
 285     {"Floating Point Registers", "fpu", k_num_fpr_registers_i386,
 286      g_lldb_regnums_i386},
 287     {"Advanced Vector Extensions", "avx", k_num_avx_registers_i386,
 288      g_avx_regnums_i386}};
 289
 290 static const RegisterSet g_reg_sets_x86_64[k_num_register_sets] = {
 291     {"General Purpose Registers", "gpr", k_num_gpr_registers_x86_64,
 292      g_gpr_regnums_x86_64},
 293     {"Floating Point Registers", "fpu", k_num_fpr_registers_x86_64,
 294      g_lldb_regnums_x86_64},
 295     {"Advanced Vector Extensions", "avx", k_num_avx_registers_x86_64,
 296      g_avx_regnums_x86_64}};
 297
 298 bool RegisterContextPOSIX_x86::IsGPR(unsigned reg) {
 299   return reg <= m_reg_info.last_gpr; // GPR's come first.
 300 }
 301
 302 bool RegisterContextPOSIX_x86::IsFPR(unsigned reg) {
 303   return (m_reg_info.first_fpr <= reg && reg <= m_reg_info.last_fpr);
 304 }
 305
 306 bool RegisterContextPOSIX_x86::IsAVX(unsigned reg) {
 307   return (m_reg_info.first_ymm <= reg && reg <= m_reg_info.last_ymm);
 308 }
 309
 310 bool RegisterContextPOSIX_x86::IsFPR(unsigned reg, FPRType fpr_type) {
 311   bool generic_fpr = IsFPR(reg);
 312
 313   if (fpr_type == eXSAVE)
 314     return generic_fpr || IsAVX(reg);
 315   return generic_fpr;
 316 }
 317
 318 RegisterContextPOSIX_x86::RegisterContextPOSIX_x86(
 319     Thread &thread, uint32_t concrete_frame_idx,
 320     RegisterInfoInterface *register_info)
 321     : RegisterContext(thread, concrete_frame_idx) {
 322   m_register_info_ap.reset(register_info);
 323
 324   switch (register_info->m_target_arch.GetMachine()) {
 325   case llvm::Triple::x86:
 326     m_reg_info.num_registers = k_num_registers_i386;
 327     m_reg_info.num_gpr_registers = k_num_gpr_registers_i386;
 328     m_reg_info.num_fpr_registers = k_num_fpr_registers_i386;
 329     m_reg_info.num_avx_registers = k_num_avx_registers_i386;
 330     m_reg_info.last_gpr = k_last_gpr_i386;
 331     m_reg_info.first_fpr = k_first_fpr_i386;
 332     m_reg_info.last_fpr = k_last_fpr_i386;
 333     m_reg_info.first_st = lldb_st0_i386;
 334     m_reg_info.last_st = lldb_st7_i386;
 335     m_reg_info.first_mm = lldb_mm0_i386;
 336     m_reg_info.last_mm = lldb_mm7_i386;
 337     m_reg_info.first_xmm = lldb_xmm0_i386;
 338     m_reg_info.last_xmm = lldb_xmm7_i386;
 339     m_reg_info.first_ymm = lldb_ymm0_i386;
 340     m_reg_info.last_ymm = lldb_ymm7_i386;
 341     m_reg_info.first_dr = lldb_dr0_i386;
 342     m_reg_info.gpr_flags = lldb_eflags_i386;
 343     break;
 344   case llvm::Triple::x86_64:
 345     m_reg_info.num_registers = k_num_registers_x86_64;
 346     m_reg_info.num_gpr_registers = k_num_gpr_registers_x86_64;
 347     m_reg_info.num_fpr_registers = k_num_fpr_registers_x86_64;
 348     m_reg_info.num_avx_registers = k_num_avx_registers_x86_64;
 349     m_reg_info.last_gpr = k_last_gpr_x86_64;
 350     m_reg_info.first_fpr = k_first_fpr_x86_64;
 351     m_reg_info.last_fpr = k_last_fpr_x86_64;
 352     m_reg_info.first_st = lldb_st0_x86_64;
 353     m_reg_info.last_st = lldb_st7_x86_64;
 354     m_reg_info.first_mm = lldb_mm0_x86_64;
 355     m_reg_info.last_mm = lldb_mm7_x86_64;
 356     m_reg_info.first_xmm = lldb_xmm0_x86_64;
 357     m_reg_info.last_xmm = lldb_xmm15_x86_64;
 358     m_reg_info.first_ymm = lldb_ymm0_x86_64;
 359     m_reg_info.last_ymm = lldb_ymm15_x86_64;
 360     m_reg_info.first_dr = lldb_dr0_x86_64;
 361     m_reg_info.gpr_flags = lldb_rflags_x86_64;
 362     break;
 363   default:
 364     assert(false && "Unhandled target architecture.");
 365     break;
 366   }
 367
 368   ::memset(&m_fpr, 0, sizeof(FPR));
 369
 370   m_fpr_type = eNotValid;
 371 }
 372
 373 RegisterContextPOSIX_x86::~RegisterContextPOSIX_x86() {}
 374
 375 RegisterContextPOSIX_x86::FPRType RegisterContextPOSIX_x86::GetFPRType() {
 376   if (m_fpr_type == eNotValid) {
 377     // TODO: Use assembly to call cpuid on the inferior and query ebx or ecx
 378     m_fpr_type = eXSAVE; // extended floating-point registers, if available
 379     if (!ReadFPR())
 380       m_fpr_type = eFXSAVE; // assume generic floating-point registers
 381   }
 382   return m_fpr_type;
 383 }
 384
 385 void RegisterContextPOSIX_x86::Invalidate() {}
 386
 387 void RegisterContextPOSIX_x86::InvalidateAllRegisters() {}
 388
 389 unsigned RegisterContextPOSIX_x86::GetRegisterOffset(unsigned reg) {
 390   assert(reg < m_reg_info.num_registers && "Invalid register number.");
 391   return GetRegisterInfo()[reg].byte_offset;
 392 }
 393
 394 unsigned RegisterContextPOSIX_x86::GetRegisterSize(unsigned reg) {
 395   assert(reg < m_reg_info.num_registers && "Invalid register number.");
 396   return GetRegisterInfo()[reg].byte_size;
 397 }
 398
 399 size_t RegisterContextPOSIX_x86::GetRegisterCount() {
 400   size_t num_registers =
 401       m_reg_info.num_gpr_registers + m_reg_info.num_fpr_registers;
 402   if (GetFPRType() == eXSAVE)
 403     return num_registers + m_reg_info.num_avx_registers;
 404   return num_registers;
 405 }
 406
 407 size_t RegisterContextPOSIX_x86::GetGPRSize() {
 408   return m_register_info_ap->GetGPRSize();
 409 }
 410
 411 size_t RegisterContextPOSIX_x86::GetFXSAVEOffset() {
 412   return GetRegisterInfo()[m_reg_info.first_fpr].byte_offset;
 413 }
 414
 415 const RegisterInfo *RegisterContextPOSIX_x86::GetRegisterInfo() {
 416   // Commonly, this method is overridden and g_register_infos is copied and
 417   // specialized. So, use GetRegisterInfo() rather than g_register_infos in
 418   // this scope.
 419   return m_register_info_ap->GetRegisterInfo();
 420 }
 421
 422 const RegisterInfo *
 423 RegisterContextPOSIX_x86::GetRegisterInfoAtIndex(size_t reg) {
 424   if (reg < m_reg_info.num_registers)
 425     return &GetRegisterInfo()[reg];
 426   else
 427     return NULL;
 428 }
 429
 430 size_t RegisterContextPOSIX_x86::GetRegisterSetCount() {
 431   size_t sets = 0;
 432   for (size_t set = 0; set < k_num_register_sets; ++set) {
 433     if (IsRegisterSetAvailable(set))
 434       ++sets;
 435   }
 436
 437   return sets;
 438 }
 439
 440 const RegisterSet *RegisterContextPOSIX_x86::GetRegisterSet(size_t set) {
 441   if (IsRegisterSetAvailable(set)) {
 442     switch (m_register_info_ap->m_target_arch.GetMachine()) {
 443     case llvm::Triple::x86:
 444       return &g_reg_sets_i386[set];
 445     case llvm::Triple::x86_64:
 446       return &g_reg_sets_x86_64[set];
 447     default:
 448       assert(false && "Unhandled target architecture.");
 449       return NULL;
 450     }
 451   }
 452   return NULL;
 453 }
 454
 455 const char *RegisterContextPOSIX_x86::GetRegisterName(unsigned reg) {
 456   assert(reg < m_reg_info.num_registers && "Invalid register offset.");
 457   return GetRegisterInfo()[reg].name;
 458 }
 459
 460 lldb::ByteOrder RegisterContextPOSIX_x86::GetByteOrder() {
 461   // Get the target process whose privileged thread was used for the register
 462   // read.
 463   lldb::ByteOrder byte_order = eByteOrderInvalid;
 464   Process *process = CalculateProcess().get();
 465
 466   if (process)
 467     byte_order = process->GetByteOrder();
 468   return byte_order;
 469 }
 470
 471 // Parse ymm registers and into xmm.bytes and ymmh.bytes.
 472 bool RegisterContextPOSIX_x86::CopyYMMtoXSTATE(uint32_t reg,
 473                                                lldb::ByteOrder byte_order) {
 474   if (!IsAVX(reg))
 475     return false;
 476
 477   if (byte_order == eByteOrderLittle) {
 478     ::memcpy(m_fpr.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
 479              m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, sizeof(XMMReg));
 480     ::memcpy(m_fpr.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
 481              m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
 482              sizeof(YMMHReg));
 483     return true;
 484   }
 485
 486   if (byte_order == eByteOrderBig) {
 487     ::memcpy(m_fpr.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
 488              m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
 489              sizeof(XMMReg));
 490     ::memcpy(m_fpr.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
 491              m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes, sizeof(YMMHReg));
 492     return true;
 493   }
 494   return false; // unsupported or invalid byte order
 495 }
 496
 497 // Concatenate xmm.bytes with ymmh.bytes
 498 bool RegisterContextPOSIX_x86::CopyXSTATEtoYMM(uint32_t reg,
 499                                                lldb::ByteOrder byte_order) {
 500   if (!IsAVX(reg))
 501     return false;
 502
 503   if (byte_order == eByteOrderLittle) {
 504     ::memcpy(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes,
 505              m_fpr.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
 506              sizeof(XMMReg));
 507     ::memcpy(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
 508              m_fpr.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
 509              sizeof(YMMHReg));
 510     return true;
 511   }
 512
 513   if (byte_order == eByteOrderBig) {
 514     ::memcpy(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes + sizeof(XMMReg),
 515              m_fpr.fxsave.xmm[reg - m_reg_info.first_ymm].bytes,
 516              sizeof(XMMReg));
 517     ::memcpy(m_ymm_set.ymm[reg - m_reg_info.first_ymm].bytes,
 518              m_fpr.xsave.ymmh[reg - m_reg_info.first_ymm].bytes,
 519              sizeof(YMMHReg));
 520     return true;
 521   }
 522   return false; // unsupported or invalid byte order
 523 }
 524
 525 bool RegisterContextPOSIX_x86::IsRegisterSetAvailable(size_t set_index) {
 526   // Note: Extended register sets are assumed to be at the end of g_reg_sets...
 527   size_t num_sets = k_num_register_sets - k_num_extended_register_sets;
 528
 529   if (GetFPRType() == eXSAVE) // ...and to start with AVX registers.
 530     ++num_sets;
 531   return (set_index < num_sets);
 532 }
 533
 534 // Used when parsing DWARF and EH frame information and any other object file
 535 // sections that contain register numbers in them.
 536 uint32_t RegisterContextPOSIX_x86::ConvertRegisterKindToRegisterNumber(
 537     lldb::RegisterKind kind, uint32_t num) {
 538   const uint32_t num_regs = GetRegisterCount();
 539
 540   assert(kind < kNumRegisterKinds);
 541   for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) {
 542     const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx);
 543
 544     if (reg_info->kinds[kind] == num)
 545       return reg_idx;
 546   }
 547
 548   return LLDB_INVALID_REGNUM;
 549 }