aspire r7

Label: Style Color SP data problems BS ad program nbsp I. background In the process of program debugging, a problem occurs. After the program goes into the stack and goes out of the stack, it always runs and uses GDB for debugging. After the stack operation is found, check that the data after the stack is imported does not match when the stack is released. Ii. Analysis content 1, Stmfd SP !, {R0-R12, R1} Previously, it was understood that the first step is to import the stack R1,

the 00h-1fh 32 units are evenly divided into four, each containing eight 8-bit registers, are named in R0-R7, we often call these registers as General registers. The registers in these four blocks are called R0-R7, so how to distinguish and use them in the program? Intelligent intel engineers have assigned a register-program status word register (psw) to manage them. The CPU only needs to define the D3 and

These days are quite troublesome. For RTSP server, we need to port live555 to Android. The common practice is to write an android program. MK, put it under the android source code tree, mm, you can, but I have always had a bunch of errors, and I compiled it under a separate ndk, it turned out to be normal, just in idle time, let's take a look at the compilation error prompts. I didn't find the C ++ libraries. The Compiler automatically adds these libraries to the ndk, in the android source code

divided into two parts: the operation code and the operand. The operation code represents the command function, such as ADD and sub. It represents a specific circuit in the CPU, for example, add represents the addition circuit, sub represents the subtraction circuit, and the operand represents the input and output of the function, and the input and output of the corresponding circuit. 2) currently there are four functions in common, so at least two bits are required for encoding. For example, 0

(9) Call the decompress_kernel () function of the file Misc. C to decompress the kernel at the end of the cache.(After the R2 address ). The register values are changed as follows:R0 indicates the size of the extracted kernel.R4 is the address when the kernel is executedR5 is the start address of the kernel after decompression.R6 is the CPU type value (processor ID)R7 is the system type value (Architecture ID)(10) after the reloc_start code is copied

We all know that Linux applications must use system calls to access the kernel to switch from USR mode to SVC mode. Let's take a look at its implementation process. System calling is a service provided by the operating system of the operating system. User Programs reference various services provided by the kernel through various system calls. The execution of system calls puts user programs into the kernel, this is completed by SWI soft interruption. The Soft Interrupt corresponding to the Linux

table: There is a route to each destination. Such a table is called a route table.　　Basic concepts:OSPF regards the entire network (subnet on the Internet or other types of networks) as an autonomous system ()　　In each as, several physically adjacent routers (routers) and networks form an area. These areas are generally non-intersecting and divide the entire.　　Is an example of a typical Autonomous System Division: Rxx represents the router, N * represents the network,　　1. R1, R2, R3, R4, and N

com.sun.jdi.socketattach:hostname=127.0.0.1,port=8700Let the program resume running, then the program will stop at linker, the Jni_oload function up and down the breakpoint, and then F9 run the program, F8 run, run to this function will exit, F7 follow-up to debugis a Create thread library function, if the disassembly code can see the specific address directive is BLX R7,R7 value is the address of the Pthr

file named zimage.gz, and use the 010Editor tool, ctrl+f shortcut key to find the hexadecimal content 1F 8B 08 00, find the front of the data are all deleted, so that the zimage.gz file into the standard gzip compressed files, this way you can use Gunzip decompression. Command: Gunzip zimage.gz; getting to know the zimage after pressure is the final file we're going to deal with. 4. Ida opens the Zimage kernel file for modification, with the kernel file Zimage from the previous step, and opens

Nagios->check_openmanage[dell r7*]2014 November 13 07:44 Requirements: Monitor Dell R7 series server hardware status environment information through Nagios: Nagios Monitoring host: Xxx.xxx.xxx.xxxNagios use version: 3.2.3nagiosql:3.2.0dell R710:xxx.xxx.xxx.xxx monitoring logic: 1.Nagios via plug-in Check_nrpe call Check_openmange Receive hardware information.　　2. The server-side SNMP service obtains the har

final confirmation. 　　"DX12 Feature level 12_0" This level is AMD graphics card, desktop independence includes Radeon HD 7790, R7 260/x, R9 285, R9 290/x, R9 295x2, total six. APU has no clear statement, but Kaveri A-7000, Godavari a-7000/8000, Mullins a/e-6000, Beema a/e-6000 series should be at this level. Nvidia has no such level. 　　"DX12 Feature level 11_1" This is much, AMD covers 7790 Radeon HD 7700/7800/7900 series All models, R9 270/x,

Tags: res now NIS class MEM cal CLU Hardware Application layer1. Linux ArchitectureThe address space of the Linux system is divided into user space and kernel space, which can be transferred from user space to kernel space through system call and hardware interrupt.2. System Call Interface① Generally, user processes cannot access kernel space. The Linux kernel provides a set of subroutines for implementing various system functions that users can call to access the data and functions of the Linux

) 0xFFFFFFFC, that is, remove the last two bits, You can subtract 2 from the calculation. But there is also an assumption that the start address of the hook function must be 4-byte aligned, even if the hook function is written using the thumb instruction set. It is said that when the hook function 4 byte alignment, add R5, PC, #12这条指令的地址刚好是2字节对齐, then according to the above paragraph can be reduced by 2 R5 point is jumpt[16] instead of jumpt[18], so this hook function is required. After t

". Try "Help". (GDB) R6 0x0 0Undefined Command: "R6". Try "Help". (gdb) R7 0x1c8df0 1871344Undefined command: "R7". Try "Help". (gdb) R8 0xc00 3072Undefined command: "R8". Try "Help". (gdb) R9 0x549ff237 1419768375Undefined command: "R9". Try "Help". (gdb) R10 0x7000806 117442566Undefined command: "R10". Try "Help". (gdb) R11 0x7000806 117442566Undefined command: "R11". Try "Help". (GDB) R12 0xffffffe

to take effect: sudo source/etc/profile. Input: android. If the Android SDK Manager window is displayed, the Environment configuration is successful. 5. Install NDK 1) download NDK ,: http://developer.android.com/sdk/ndk/index.html Select the Linux version. Decompress the package, configure the environment, open the/etc/profile file, and enter the following content at the bottom: [plain] export NDK_HOME =/home/mayliang/programs/android-ndk-r7 export

Describes how to use SWI for an interruption.Privileged mode: A protection mode in which superisor SVC is used by the OS.It is actually an interruption. For hardware users, the interruption mode is defined by the user.1. Understand the available registers of normal user statusR0 ~ R7 universal R8 ~ R12 independent registers [some mode register groups are independent] R13-SP [independent] R14-LR [independent] PC [general] CPSR [independent]R0 ~

00000000Backtrace:[R7 = 44065570 R6 = 4156f04 R5 = 00008000 r4 = 44065570[R5 = ffffffe7 r4 = c67a3720[R7 = 00000000 R6 = 00000008 R5 = 44065570 r4 = c67a3720[R7 = 00000036 R6 = 4156f04 R5 = fffffff7 r4 = c67a3720[R6 = 0000070c R5 = 00030140 r4 = 0002c6e0Code: e24cb004 e59f7064 e1a03800 e1a04823 (e7973104)Solution: cmem. ko is the memory space that can be shared

example, when an open system is called, the library function will eventually call _ syscall (Open). The macro is SWI #__ nr_open, that is, SWI #0x900005 triggers the interruption, 0 X in the [LR, #-4] address, the processor jumps to the ARCH/ARM/kernel/entry-common.S vector_swi read [LR, #-4] address in the interrupt number, then query the sys_call_table system call table in the arch/ARM/kernel/entry-common.S. defined in S, __nr_open corresponds to the sequence number in the table_ Syscall_star

43891f6c R7 42084eb0 I/debug (971): R8 4a570b80 R9 42084ea8 10 42084e94 FP 0011f3e0 I/debug (971): IP a7f0110c SP 4a570b50 LR ae203247 PC 815009ba CPSR a0000030 I/debug (971): #00 PC 000009ba/system/lib/HW/sensors. Default. So I/debug (971): #01 PC 00003244/system/lib/libandroid_servers.so I/debug (971): #02 PC 00011cf4/system/lib/libdvm. So I/debug (971): #03 PC 0003f194/system/lib/libdvm. So I/debug (971): #04 PC 00016cb8/system/lib/libdvm. So I/de

/// /// Blur the image/// /// /// Public static bitmap blur (Bitmap bitmap){ If (Bitmap = NULL){Return NULL;} Int width = bitmap. width;Int Height = bitmap. height; Try{Bitmap BMP return = new Bitmap (width, height, pixelformat. format24bpprgb );Bitmapdata srcbits = bitmap. lockbits (New rectangle (0, 0, width, height), imagelockmode. readonly, pixelformat. format24bpprgb );Bitmapdata targetbits = BMP return. lockbits (New rectangle (0, 0, width, height), imagelockmode. writeonly, pixelformat. f