vendor/lldb/lldb-r216948

1 files changed, 127 insertions, 0 deletions

diff --git a/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp b/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp
new file mode 100644
index 000000000000..b9b9dca07be4
--- /dev/null
+++ b/source/Plugins/Process/Utility/RegisterContextLinux_i386.cpp
@@ -0,0 +1,127 @@
+//===-- RegisterContextLinux_i386.cpp --------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#include "RegisterContextPOSIX_x86.h"
+#include "RegisterContextLinux_i386.h"
+
+using namespace lldb_private;
+using namespace lldb;
+
+struct GPR
+{
+    uint32_t ebx;
+    uint32_t ecx;
+    uint32_t edx;
+    uint32_t esi;
+    uint32_t edi;
+    uint32_t ebp;
+    uint32_t eax;
+    uint32_t ds;
+    uint32_t es;
+    uint32_t fs;
+    uint32_t gs;
+    uint32_t orig_ax;
+    uint32_t eip;
+    uint32_t cs;
+    uint32_t eflags;
+    uint32_t esp;
+    uint32_t ss;
+};
+
+struct FPR_i386
+{
+    uint16_t fctrl;         // FPU Control Word (fcw)
+    uint16_t fstat;         // FPU Status Word (fsw)
+    uint16_t ftag;          // FPU Tag Word (ftw)
+    uint16_t fop;           // Last Instruction Opcode (fop)
+    union
+    {
+        struct
+        {
+            uint64_t fip;   // Instruction Pointer
+            uint64_t fdp;   // Data Pointer
+        } x86_64;
+        struct
+        {
+            uint32_t fioff;   // FPU IP Offset (fip)
+            uint32_t fiseg;   // FPU IP Selector (fcs)
+            uint32_t fooff;   // FPU Operand Pointer Offset (foo)
+            uint32_t foseg;   // FPU Operand Pointer Selector (fos)
+        } i386_;// Added _ in the end to avoid error with gcc defining i386 in some cases
+    } ptr;
+    uint32_t mxcsr;         // MXCSR Register State
+    uint32_t mxcsrmask;     // MXCSR Mask
+    MMSReg   stmm[8];       // 8*16 bytes for each FP-reg = 128 bytes
+    XMMReg   xmm[8];        // 8*16 bytes for each XMM-reg = 128 bytes
+    uint32_t padding[56];
+};
+
+struct UserArea
+{
+    GPR      regs;          // General purpose registers.
+    int32_t  fpvalid;       // True if FPU is being used.
+    FPR_i386   i387;        // FPU registers.
+    uint32_t tsize;         // Text segment size.
+    uint32_t dsize;         // Data segment size.
+    uint32_t ssize;         // Stack segment size.
+    uint32_t start_code;    // VM address of text.
+    uint32_t start_stack;   // VM address of stack bottom (top in rsp).
+    int32_t  signal;        // Signal causing core dump.
+    int32_t  reserved;      // Unused.
+    uint32_t ar0;           // Location of GPR's.
+    uint32_t fpstate;       // Location of FPR's. Should be a FXSTATE *, but this
+	                        //  has to be 32-bits even on 64-bit systems.
+    uint32_t magic;         // Identifier for core dumps.
+    char     u_comm[32];    // Command causing core dump.
+    uint32_t u_debugreg[8]; // Debug registers (DR0 - DR7).
+};
+
+#define DR_SIZE sizeof(((UserArea*)NULL)->u_debugreg[0])
+#define DR_0_OFFSET 0xFC
+#define DR_OFFSET(reg_index) \
+    (DR_0_OFFSET + (reg_index * 4))
+#define FPR_SIZE(reg) sizeof(((FPR_i386*)NULL)->reg)
+
+//---------------------------------------------------------------------------
+// Include RegisterInfos_i386 to declare our g_register_infos_i386 structure.
+//---------------------------------------------------------------------------
+#define DECLARE_REGISTER_INFOS_I386_STRUCT
+#include "RegisterInfos_i386.h"
+#undef DECLARE_REGISTER_INFOS_I386_STRUCT
+
+RegisterContextLinux_i386::RegisterContextLinux_i386(const ArchSpec &target_arch) :
+    RegisterInfoInterface(target_arch)
+{
+}
+
+size_t
+RegisterContextLinux_i386::GetGPRSize() const
+{
+    return sizeof(GPR);
+}
+
+const RegisterInfo *
+RegisterContextLinux_i386::GetRegisterInfo() const
+{
+    switch (m_target_arch.GetMachine())
+    {
+        case llvm::Triple::x86:            
+            return g_register_infos_i386;
+        default:
+            assert(false && "Unhandled target architecture.");
+            return NULL;
+    }
+}
+
+uint32_t
+RegisterContextLinux_i386::GetRegisterCount () const
+{
+    return static_cast<uint32_t> (sizeof (g_register_infos_i386) / sizeof (g_register_infos_i386 [0]));
+}
+