odg r7

, #0x17 @ angel_swireason_entersvc ARM (Swi 0x123456) @ angel_swi_arm THUMB (svc 0xab) @ angel_swi_thumbNot_angel:Mrs R2, CPSR @ turn off interrupts to Orr R2, R2, #0xc0 @ Prevent Angel from running MSR cpsr_c, R2#else teqp pc, #0x0c000003 @ tur N Off Interrupts#endifIf the kernel runs from Angel into a mode of USR mode, it will need to enter the SVC mode and disable all Fiq and IRQ interrupts. These are only performed when the user mode is entered. Normally, the code that closes the interrupt i

Set display, single display hybrid dual graphics technology has a long history, and experienced a number of generations, and the only has a set of obvious, unique AMD in this respect has a unique advantage. Now, the new release of the Catalyst 14.1 Beta added to the Kaveri Apu Dual graphics support, together to see how the match, the effect of how. The Catalyst Control Center can be checked to turn on dual graphics. Kaveri APU Dual Graphics combination The table looks

then remove the library files (such as c51s. lib) and cfunc. c, and the cfunc. add A51 to the project.// The cfunc. SRC file is as follows. \ cfunc. SRC generated from: cfunc. c Name cfunc? PR? _ Afunc? Cfunc segment code? Bi? _ Afunc? Cfunc segment bit overlayable public? _ Afunc? Bit public _ afunc rseg? Bi? _ Afunc? Cfunc? _ Afunc? Bit: v_bflag? 041: dbit 1 ; # Define uchar unsigned char; # define uint unsigned int; uint afunc (uchar v_achr, bit v_bflag) Rseg? PR? _ Afunc? Cfunc_afunc: using

next points to the process to be switched. Let's talk about the code I transplanted. Since the code is a assembler, first introduce the CPU structure. The cpu I use uses 16-bit commands, 32-bit addresses and data. There are 16 General registers recorded as R0-R15. R0 as the stack pointer register sp, R1 usage is not fixed, r2-r6 as the parameter transfer register, function call if there are no more than five parameters, the parameters are placed in R2-R6 from left to right. At the same time, R2

= tag_next (tag_array ); ...... Tag_array-> hdr. tag = ATAG_NONE; Tag_array-> hdr. size = 0; Tag_array = tag_next (tag_array ); Finally, copy the linked list of kernel parameters to the default physical address 0x20000100 of the kernel. In this way, the parameter linked list is created. 4. kernel receiving Parameters The following describes how the Linux kernel receives the kernel parameters passed by BootLoader from the zImage Image Based on the ARM architecture. Shows the zImage startup pro

Most people who have studied single-chip microcomputer know the names of "Water lamp" or "horse lamp". The specific implementation effect is to display a group of changes cyclically according to a fixed rule. For example, if you use a byte length space to realize the "marquee", you can change the value of this Byte as follows: "0000 0001b"-> "0000 0010b"-> "0000 0100b"-> "0000 1000b"-> "0001 10000b"-> "0010 10000b"-> "0100 10000b" -> "1000 10000b"-> "0000 0001b" (loop) For example, to change th

vectortable, they are placed in the ROM at the beginning, which requires them to be moved to the specified position when the system starts up, the following code is intended for this purpose.; Setup the vector area.;; (R8) = PTR to exception Vectors Add R7, PC, # vectorinstructions-(. + 8)Ldmia R7 !, {R0-r3}; load 4 instructionsStmia R8 !, {R0-r3}; store the 4 vector instructionsLdmia

Key words: JNI, win7, Android SDK, Android ndk, cygwin, Eclipse, JDK 1.download and install the latest cygwinsetup.exeNote that you need to select devel @ install, which is required to simulate the Linux environment ,,,,SelectHttp://mirrors.163.comFast download speedAfter installation, open make-V and GCC-V to test whether the installation is successful. 2.download and install jdk-7u2-windows-i586.exeProblems that may occur later: When javah.exeis used in the pathsystem runtime to generat

Eclipse+cdt+gdb Debugging Android NDK ProgramFirst introduce the development environment, in this environment, the UP master guarantee is no problem. Ubuntu 11.10 Eclipse 3.7 (Indego) for Java JDK 6 Android SDK 2.2 Andrid NDK R7 Of course, in the Windows environment through the Cygwin and other tools can also be implemented GDB debugging, I have indeed implemented. But the performance is too low, the card can not be used

files Here are examples of how to do 6 of these things 1. Upgrade a single mail databaseThis sample looks for the mail database USER in the \mail subdirectory of the Notes data directory. Nsf. The Mail conversion utility replaces the current message template with the R7 mail template dwa7.ntf Regardless of the template used before the mail file.Load Convert MAIL\USER.NSF * dwa7.ntf 2, upgrade all mail databases in the directoryThis example finds al

immediate number is greater than 0xff, immediately the number of loops left to shift even digits, to get a number between 0x0--0xffMeeting the above two conditions is legal:Examples of illegal numbers: 0x101 0xffffffIllegal numbers can be manipulated by this example: LDR r1,=0xfffff, register addressingMOV R1,R2, register Indirect addressingLDR R1,[R2]; R2 the data read out of the storage unit pointed to is saved in R1STR R1,[R2]; Read the data in the R1 and save it in the storage unit that the

I have read the article about the transplantation of UC on the C51 by Mr. Yang from julong. However, with the understanding of UC, it is found that the task function in the porting program of instructor Yang cannot pass parameters, so he tried to change it. The running process of UC is as follows: 1. osinit () function initializes idle tasks. If there may be statistical tasks, of course, there are PCB and event idle lists (I think anyone who knows UC knows how to get started ); 2. ostaskcreate

Recently, I am very interested in iOS reverse engineering. Currently, iOS reverse engineering books include Hacking and Securing IOS Applications and iOS Hacker's Handbook. The Chinese books include iOS reverse engineering: analysis and practice: the programmer Nian Qian's iOS security attack and defense series english blog includes: Prateek Gianchandani's iOS Security Series blog which involves ARM assembly, but it is only widely used, the ARM assembly on iOS is not described in detail. Therefo

cannot be predicted. Therefore, in scenarios with high real-time requirements, compilation and C joint applications are also required. But is there a latency program that needs to be implemented through assembly? To find this answer, I did an experiment.When using C language to implement latency programs, the first thing that comes to mind is the commonly used loop statements in C. The following code is frequently seen on the Internet:Void delay2 (unsigned char I){For (; I! = 0; I --);}How high

registers cannot be accessed concurrently, and the processor state and operating mode determine which registers are available to the programmer. L Non-grouped universal register R0-R7 R0--R7 in 16 data registers are non-grouped universal registers that are used to hold data and addresses . L Packet General register R8-R15, processor mode determines physical register --r8-r12 Register: Fast Interrupt and o

configuration, cost-effective In the middle of April this year, Le saw the release of three blockbuster new machines, respectively, le 1, le 1 Pro, le view super mobile phone max. In these three models, the video super Mobile Max screen max, hardware configuration is also the most fever. The Super mobile phone Max uses the metal fuselage, has the Athens gold, the simple silver two kind of body color, the appearance simple Vogue, is called the most good-looking giant screen handset

the hardware in the case of frustration), but the performance of the great damage, not the last resort can not open. The code is very simple, it is not explained here.Third, how to get the system call number?System calls have two specifications, one is the old Oabi (the system call is from the SWI Directive) and the other is the arm ABI, which is the Eabi (the system call is from R7). If you want to be compatible with the old Oabi, then we need to de

, design a piece of code that will re-write a command to a specific address. Then, we can use a loop to implement it because we need to return to the original address and execute it again. The Code is as follows: #! Cpp _ asm _ volatile (1 "stmfd sp !, {R4-r8, lr} \ n "2" mov r6, #0 \ n "used to count the number of cycles, debug 3" mov r7, #0 \ n "assigns the initial value 4" mov r8, pc \ n "4, and 7 for r7

Lab requirements:Set up the topology, import the pre-configuration, and troubleshoot the following errors.1. R4 cannot learn the host entries mounted on R5;2. The OSPF neighbor between R6 and R7 cannot start;3. R4 cannot form OSPF neighbors with R2 and R3;4. R7 cannot form an IPsec neighbor with R8 or R9;5. The host on R5 cannot be pinged to the host on R9;6. Ensure that the packets sent from the host on R5

------------------------------------------------------------------------------------------------------------------------------------------- R7 (config-If) # int lo0R7 (config-If) # IP add 7.7.7.7 255.255.255.0 R7 (config) # int F0/0R7 (config-If) # IP add 10.1.1.7 255.255.255.0R7 (config-If) # No Shutdown Certificate ------------------------------------------------------------------------------------------