compiler design.3.2 align data access
The load/store command of the CPU of the Proteus requires data to be aligned. Data with a length of 4 should be placed on the 4N boundary, and data with a length of 2 should be placed on the 2N boundary. Take the arm cpu load as an example:
LDR R5,[R4]LDRSH R7,[R6]LDRB R9,[R8]
LDR, ldrsh, and ldrb read one word, half word, and byte from the memory and put them in the specified register. For example
) True
String I = @ "Live for nothing,
Die for something "; // multiple rows
RegEx R1 = new RegEx ("^ live for nothing, die for something $ ");
Console. writeline ("R1 match count:" + r1.matches (I). Count); // 0
RegEx r2 = new RegEx ("^ live for nothing, die for something $", regexoptions. multiline );
Console. writeline ("R2 match count:" + r2.matches (I). Count); // 0
RegEx R3 = new RegEx ("^ live for nothing, \ r \ ndie for something $ ");
Console. writeline ("R3 match count:" + r3.matches
. weird, but I didn't find a way to attach it properly. and this is pity, because IDA is a great tool and it wocould make debugging a pleasure, but I had to use GDB instead.
Second, Android has problems with debugging multi-threaded native code. mt support was added in ndk R5 and because of some bugs it's not possible on a system older than gingerbread.
Third, you cocould attach GDB manually, but ndk-GDB script does great work for you. You will have t
;-Set up abort mode and set abort mode StackMSR cpsr_c, # arm_mode_abort: Or: I _bit: Or: f_bitBic R4, R4, #3; insure word alignementMoV sp, R4; init stack abort
;-Set up undefined instruction mode and set UNDEF mode StackMSR cpsr_c, # arm_mode_undef: Or: I _bit: Or: f_bitBic R5, R5, #3; insure word alignementMoV sp, R5; init stack UNDEF
;-Set up user mode and s
CDT and support C/C ++ projects.
Http://www.eclipse.org/cdt/downloads.php
5. Configure eclipse
Project generation is fast and flexible. Have you ever used an eclipse generator? They are configurable switches used to execute your configured commands and refresh engineering resources. My configurations are as follows:
Right-click your project and select "properties"
Select "builders" in the list on the left"
Click "new..." on the right ..." Button
In the list box, select "program" as the con
using temporary variables
Very cute tips. I have a detailed explanation in the link at the top of this page. It's faster than 20%.VaR T: Int =;
A = B;
B = T;
// Equivalent:
A ^ = B;
B ^ =;
A ^ = B;
Auto-increment/auto-Increment(Increment/decrement)
This is much slower than before, but it is a good way to blur your code ;-)I = -~ I; // I ++
I = ~ -I; // I --
Invert(Sign flipping using not or XOR)
Another strange thing is that this is actually 300% faster!I =-I;
// Equivalent:
I = ~ I + 1;
// Or
. Otherwise, an sb restarts. You need to attach the mounted vlan .... This is...
The method for automatically inserting a vlan is to regularly retrieve data from the switch, then compare the information and push the information and instructions.
The configuration of automatic raid is a small kernel system encapsulated with the raid vendor tool provided by the manufacturer to implement automatic configuration.
You can use MegaCli to implement these functions.
I would like to give a brief introdu
Nginx load balancing-expansion function (NGINX Plus), nginx Load Balancing
Nginx load balancing-expansion feature (NGINX Plus). This article mainly introduces the functions of NGINX Plus, and updates across different versions such as NGINX Plus R5, R6, R7, and R9.What is NGINX Plus?
As the name suggests, it is the enhanced or extended version of Nginx. We know that Nginx is open-source and free of charge, but charges are required for many functions of
Collect it and give the children who are hard to use and cannot find a hope
Ndk-r4 ndk-r5 ndk-r6 linxu and windows
Http://dl.google.com/android/ndk/android-ndk-r4b-linux-x86.zip
Http://www.ideasandroid.com/android/sdk/android-ndk-r4-linux-x86.zip
Http://dl.google.com/android/ndk/android-ndk-r5-linux-x86.tar.bz2
Http://dl.google.com/android/ndk/android-ndk-r6-linux-x86.tar.bz2
Http://dl.google.com/andr
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,
, RCA, and SCR.
Operation Condition register (OCR): 32-bit OCR includes a working voltmeter supported by the card device;
Card identification number register (CID): contains the card information used in the card recognition phase, including the manufacturer ID and product name;
Card specific data register (CSD): the CSD register provides information on how to access the card device, including defining the data format, error verification type, maximum access times, and data transmission rate;
Rel
/kernel/head. S:
The first statement first gets the processor ID with the processor, and then uses the _ lookup_processor_type function to find whether the front core supports this handler in the head-common.S:
Simply put, the physical address of _ proc_info_begin Row 3 after row 3 is complete is _ proc_info_begin. After Row 3 is complete, R5 = _ proc_info_beginR6 =__ proc_info_end, R7 = zookeeper address of the 196 line generation, the difference
)
#DefineIrq_eint15S3c2410_irq(43)
#DefineIrq_eint16S3c2410_irq(44)
....
After reading N for a long time, I found the reason:During initialization, the interrupt source and interrupt number are mapped one by one in the relevant startup code, and then irq_desc is initialized. When the interrupt is executedState and control register to convert, convert the corresponding interrupt source to the interrupt number, and then execute the Interrupt Routine. Here, we will analyze the 2440 process in a
Background: In our computer, images are displayed in rgb888 format. Each pixel of the 24-Bit Bitmap stores 32-bit data, that is, rgb888 + Alpha, and Alpha is a translucent padding Byte ...... However, for a true color image, it is difficult for the naked eye to distinguish between 16 bits. Therefore, in some cases, rgb888 can be converted to rgb565 for storage, which reduces the storage capacity, reduces the data size. When the backend is displayed, rgb565 is converted to rgb888 again to achieve
.tar.bz2Linuxhttp://dl.google.com/android/ndk/android-ndk-r5b-linux-x86.tar.bz2Android SDK 3.0WindowsHttp://dl.google.com/android/installer_r10-windows.exeHttp://dl.google.com/android/android-sdk_r10-windows.zipMac OS X (Intel)Http://dl.google.com/android/android-sdk_r10-mac_x86.zipLinux (i386)Http://dl.google.com/android/android-sdk_r10-linux_x86.tgzAndroid SDK 2.3WindowsHttp://dl.google.com/android/android-sdk_r08-windows.zipHttp://dl.google.com/android/installer_r08-windows.exeLinux (i386)Htt
back)NORA (No read ahead)RA (Read ahead)ADRA (Adaptive read ahead)CachedDirect
Example:
Megacli-ldsetprop wt| wb| nora| ra| Adra-l0-a0
Or
Megacli-ldsetprop-cached|-direct-l0-a0
Or
Enable/disable Disk Cache
Megacli-ldsetprop-endskcache|-disdskcache-l0-a0
4. Create/delete array
4.1 Create a RAID5 array, consisting of a physical disk 2,3,4, the hot spare for the array is the physical disk 5
MEGACLI-CFGLDADD-R5 [1:2,1:3,1:4] WB Direct-hsp[1:5]-
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