Display or set the current CPU registers saved on entry to the Kernel Debugger. Set default addresses for E command, D command, K command and U command.
Under the Dump Formatter this command is implemented as an alias to the .R command. Also applicable to the Dump Formatter only, the default adressing mode is not set according to the VM flags of the EFLAGS register but is assumed always to be in protect mode. This has been corrected from fix pack 29 of Wapr 3.0 and base Warp 4.0.
The remaining discussion in the section applies to the Kernel Debugger.
Syntax:
컴컴 R 컴컫컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴
� �
쳐� T 컴�
� �
쳐� flag register 쳐�
� �
쳐� 2-bit flag 쳐�
� �
쳐� 16-bit register 쳐�
� �
읕� 32-bit register 쳐�
flag register:
旼컴컴컴컴컴컴컴컴컴컴컴컴�
�
쳐쩡 F 컫컴컴컫컴컴컴컴컴컴컴컴컴컴쩡컨컴컴컴컴컴컴컴컴컴컴컴컴컴�
쳐 EF 켸 읕� flag mnemonics 컴�
�
� 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
� �
쳐 CR0 컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컫컴좔컴컴컴컴컴컴컴컴컴컴캑
� 읕� cr0 flag mnemonics 컴�
� 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
� �
읕 MSW 컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컫컴좔컴컴컴컴컴컴컴컴컴컴캑
읕� msw flag mnemonics 컴�
2-bit flag:
쳐컴 IOPL 컫컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
읕 pl 켸
16-bit register:
쳐컫� AX 컫컴컴컫컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴캑
쳐 BX 캑 � �
쳐 CX 캑 읕� 16-bit value 컴�
쳐 DX 캑
쳐 SI 캑
쳐 DI 캑
쳐 SP 캑
쳐 BP 캑
쳐 IP 캑
쳐 PC 캑
쳐 ES 캑
쳐 CS 캑
쳐 DS 캑
쳐 SS 캑
쳐 FS 캑
쳐 GS 캑
쳐 TR 캑
쳐 IDTL 캑
쳐 GDTL 캑
읕 LDTR 켸
32-bit register:
쳐컫� EAX 컫컴컴컫컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴캑
쳐 EBX 캑 � �
쳐 ECX 캑 읕� 32-bit value 컴�
쳐 EDX 캑
쳐 ESI 캑
쳐 EDI 캑
쳐 ESP 캑
쳐 EBP 캑
쳐 EIP 캑
쳐 CR2 캑
쳐 CR3 캑
쳐 CR4 캑
쳐 DR0 캑
쳐 DR1 캑
쳐 DR2 캑
쳐 DR3 캑
쳐 DR6 캑
쳐 DR7 캑
쳐 TR6 캑
쳐 TR7 캑
쳐 IDTB 캑
읕 GDTB 켸
Parameters:
Register mnemonics are assigned the values displayed for use in address expressions and operands of other Kernel Debugger and Dump Formatter commands.
Note:
The .SS command may be used to change the displayed values of CS, EIP, SS and ESP. It does not affect the values restored then the Kernel Debugger returns control to the system.
This option affects both the R and .R commands.
F
Some flags are toggled by specifying a single mnemonic, others use a one mnemonic for the set condition and a another of the reset condition.
If replacements flags are omitted then the user is prompted for values.
The following mnemonics are defined. The value of t implies the flag value is toggled when the mnemonic is specified:
旼컴컫컴컴쩡컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Flag�Bit �Value�Description � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿣M �17 퀃 쿣irtual 8086 Mode (EFLAGS � � � � 쿽nly) � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿝F �16 퀃 쿝esume Flag - Disable Debug � � � � 쿐xceptions (EFLAGS only) � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙T �14 퀃 쿙ested Task � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿚V �11 �1 쿚verflow � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙V �11 �0 나Overflow � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿏N �10 �1 쿏irection Down � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿢P �10 �0 쿏irection Up � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿐I �9 �1 쿐nable Interrupts � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿏I �9 �0 쿏isable Interrupts � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙G �7 �1 쿙egative Sign � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿛L �7 �0 쿛lus Sign � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿩R �6 �1 쿩ero Result � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙Z �6 �0 쿙on-zero Result � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿌C �4 �1 쿌uxiliary Carry � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙A �4 �0 나Auxiliary Carry � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿛E �2 �1 쿛arity Even � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿛O �2 �0 쿛arity Odd � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿎Y �0 �1 쿎arry � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿙C �0 �0 나Carry � 읕컴컨컴컴좔컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸cr0 flag mnemonics
The following mnemonics are defined:
旼컴컫컴컴컴쩡컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� �Bit �Value �Flag �Description � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿛G �31 �1 쿛aging Enabled � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿐T �4 �1 쿐xtension Type Flag - x87 � � � � 퀂upport � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿟S �3 �1 쿟ask Switch Flag � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿐M �2 �1 쿐mulation exception � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿘P �1 �1 쿘ath Present � 쳐컴컵컴컴컴탠컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿛M �0 �1 쿛rotect Mode Enabled � 읕컴컨컴컴컴좔컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�msw flag mnemonics
The following mnemonics are defined:
旼컴컫컴컴쩡컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �flag�bit �value�description � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿟S �3 �1 쿟ask Switch Flag � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿐M �2 �1 쿐mulation exception � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿘P �1 �1 쿘ath Present � 쳐컴컵컴컴탠컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿛M �0 �1 쿛rotect Mode Enabled � 읕컴컨컴컴좔컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸2-bit flag
If the replacement value is not specified then the user is prompted for a value.
GDTL
This option implies a request to update a register value. If the corresponding new 32-bit value is not specified then the prompted for a replacement value.
Results & Notes:
The register information is obtained from a special save area when the Kernel Debugger is entered and restored from this area when control returns to the system.
When no operands are specified the R command operates in display mode in exactly the same manner as the .R command.
From fix pack 29 for Warp 3.0 and base Warp 4.0 Pentium Processor support was added to the Kernel Debugger. This allows CR4 to be specified as a register mnemonic, though CR4 is never displayed without specifying it explicitely as an operand to the R command. On non-Pentium systems, CR4 is shown as 00000000.
When operands are specified the R command. operates in alter mode. If no replacement value is supplied on the command then the user is prompted with the current value followed by a colon prompt character. For example:
##R SS 0030 :
Flag register value prompts have their current flag setting interpreted using the mnemonics described above. For example:
##R EF --(rf) --(vm) --(nt) nv(ov) up(dn) ei(di) pl(ng) nz(zr) na(ac) po(pe) nc(cy) :
This example shows mnemonics for current settings followed by their negating mnemonic in brackets. For example:
RF is not in effect, but since it is a toggle flag, the value RF specified at the prompt would set RF.
NV is in effect. To negate it, specify OV at the prompt.