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  1. Friedrich-Alexander-Universität
  2. Technische Fakultät
  3. Department Informatik
Friedrich-Alexander-Universität Lehrstuhl für Informatik 4 (Systemsoftware)
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                              Aufgabe 2: Unterbrechungen

                              Classes | Public Types | Static Public Member Functions | List of all members
                              State Class Reference

                              Structure for the core state after a trap. More...

                              #include <debug/gdb/state.h>

                              Classes

                              struct  Register
                               Structure to access a register. More...
                               

                              Public Types

                              enum  RegisterNumber {
                                REG_RAX ,
                                REG_RBX ,
                                REG_RCX ,
                                REG_RDX ,
                                REG_RSI ,
                                REG_RDI ,
                                REG_RBP ,
                                REG_RSP ,
                                REG_8 ,
                                REG_9 ,
                                REG_10 ,
                                REG_11 ,
                                REG_12 ,
                                REG_13 ,
                                REG_14 ,
                                REG_15 ,
                                REG_RIP ,
                                REG_EFLAGS ,
                                REG_CS ,
                                REG_SS ,
                                REG_DS ,
                                REG_ES ,
                                REG_FS ,
                                REG_GS ,
                                REG_ST0 ,
                                REG_ST1 ,
                                REG_ST2 ,
                                REG_ST3 ,
                                REG_ST4 ,
                                REG_ST5 ,
                                REG_ST6 ,
                                REG_ST7 ,
                                REG_FCTRL ,
                                REG_FSTAT ,
                                REG_FTAG ,
                                REG_FISEG ,
                                REG_FIOFF ,
                                REG_FOSEG ,
                                REG_FOOFF ,
                                REG_FOP ,
                                REG_XMM0 ,
                                REG_XMM1 ,
                                REG_XMM2 ,
                                REG_XMM3 ,
                                REG_XMM4 ,
                                REG_XMM5 ,
                                REG_XMM6 ,
                                REG_XMM7 ,
                                REG_XMM8 ,
                                REG_XMM9 ,
                                REG_XMM10 ,
                                REG_XMM11 ,
                                REG_XMM12 ,
                                REG_XMM13 ,
                                REG_XMM14 ,
                                REG_XMM15 ,
                                REG_MXCSR ,
                                REGISTERS
                              }
                               

                              Static Public Member Functions

                              static Register get (enum RegisterNumber reg=REGISTERS, int8_t core=0)
                               Access a previously saved register. More...
                               
                              static Register get (uintptr_t reg, int8_t core=0)
                               Access a previously saved register. More...
                               
                              static void save (const DebugContext *context)
                               Read register content from DebugContext and FPU. More...
                               
                              static void restore (DebugContext *context)
                               Write register contents back DebugContext and FPU. More...
                               

                              Detailed Description

                              Structure for the core state after a trap.

                              GDB allows both reading and changing of registers. These registers are saved at the entry function of a trap (before the actual GDB_Stub::handle is executed) and then converted into this structure – and usually also directly transferred to the connected GDB host. Changes done by the GDB host are first saved in this structure and then written back into the registers right before continuing the actual operating system code.

                              Member Enumeration Documentation

                              enum State::RegisterNumber
                              Enumerator
                              REG_FCTRL 

                              FPU Control Word (fcw)

                              REG_FSTAT 

                              FPU Status Word (fsw)

                              REG_FTAG 

                              FPU Tag Word (ftw)

                              REG_FISEG 

                              FPU IP Selector (fcs)

                              REG_FIOFF 

                              FPU IP Offset (fip)

                              REG_FOSEG 

                              FPU Operand Pointer Selector (fos)

                              REG_FOOFF 

                              FPU Operand Pointer Offset (foo)

                              REG_FOP 

                              Last Instruction Opcode (fop)

                              REGISTERS 

                              Total number of registers.

                              Member Function Documentation

                              State::Register State::get ( enum RegisterNumber  reg = REGISTERS,
                              int8_t  core = 0 
                              )
                              static

                              Access a previously saved register.

                              Parameters
                              regRegister identifier. If State::REGISTERS is used, all registers will be returned
                              core1-indexed Core ID (≤ 0 for current core)
                              Returns
                              Pointer to a structure with address and size of the stored contents
                              State::Register State::get ( uintptr_t  reg,
                              int8_t  core = 0 
                              )
                              static

                              Access a previously saved register.

                              Parameters
                              regRegister identifier. If State::REGISTERS is used, all registers will be returned
                              core1-indexed Core ID (≤ 0 for current core)
                              Returns
                              Pointer to a structure with address and size of the stored contents
                              void State::save ( const DebugContext *  context)
                              static

                              Read register content from DebugContext and FPU.

                              Parameters
                              contextPointer to context of gdb_interrupt_handler
                              void State::restore ( DebugContext *  context)
                              static

                              Write register contents back DebugContext and FPU.

                              Parameters
                              contextPointer to context of gdb_interrupt_handler, which will finally be restored after returning from the handler.

                              The documentation for this class was generated from the following files:
                              • debug/gdb/state.h
                              • debug/gdb/state.cc
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