r5 spotify

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Use assembly to analyze the Memory Distribution of c code

c program, "hhhhhhh" corresponds to 686868 ..... // There are also global initialization constants modified using const. the above const int finalone variable. it only corresponds to 848c zookeeper. sassembly of section. rodata: 00008488 : 848c: 0000000aandeqr0, r0, sl8490: 686868681_davsr8 !, {R3, r5, r6, fp, sp, lr} ^ 8494: 6868681_davsr8 !, {R3, r5, r6, fp, sp, lr} ^ 8498: 00000068andeqr0, r

The NDK development of Android

normally.Then enter gcc–version,g++--version,make–version,gdb–version for testing, and if you print out the version information and some descriptive information, the Cygwin installation is successful!3. Configure NDK Environment variablesAFirst find the Cygwin installation directory, find a home\b Open a. bash_profile file, add ndk=/cygdrive/Ndk=/cygdrive/e/android-ndk-r5Export NDKThe NDK name is random, for the convenience of later use, choose a short name, and then saveC Open Cygwin, enter th

Dm6446 codec engine problem summary and Solution

in: dsplinkk cmemkCPU: 0PC is at pmgr_msgq_close + 0x18/0x84 [dsplinkk]LR is at drv_ioctl + 0x2a4/0x34c [dsplinkk]PC: [SP: c5e61f00 IP: c5e61f20 FP: c5e61f1cR10: 00900036 R9: c5e60000 R8: c002a154R7: bf015430 R6: 1276f04 R5: 00008000 R4: 0000ff00R3: ff000000 R2: Listen 6c11 r1: Listen 6f04 R0: 0002ff00Flags: nzcv irqs on fiqs on mode svc_32 segment userControl: 5317f table: 858e8000 DAC: 00000015Process image_sharpen (PID: 1214, stack Limit = 0xc5e60

Build an ndk development environment in Windows (cygwin + Android-SDK + ndk)

the SRC item is the source code. This is unnecessary. 11. Test whether cygwin has been installed. Run cygwin. In the displayed command line window, enter the cygcheck-C cygwin command to print the current cygwin version and running status. If the status is OK, cygwin runs normally. Enter gcc-V, G ++ -- version, make-version, and GDB-version in sequence for testing. (note the space and-) if both print the published information and some description information, we are very happy to tell you that

Android ndk instance

ndk is downloaded ). Appendix: Android SDK: 3.0 Windows Http://dl.google.com/android/installer_r10-windows.exe Http://dl.google.com/android/android-sdk_r10-windows.zip Mac OS X (Intel) Http://dl.google.com/android/android-sdk_r10-mac_x86.zip Linux (i386) Http://dl.google.com/android/android-sdk_r10-linux_x86.tgz Android ndk r5b Windows Http://dl.google.com/android/ndk/android-ndk-r5b-windows.zip Mac OS X (Intel) Http://dl.google.com/android/ndk/android-ndk-r5b-darwin-x86.tar.bz2 Linux Http

ARM architecture and programming Learning (2)

Field 8; x length 8 bytes, relative position 8 Y Field 8; y length is 8 bytes, relative position is 16 String Field 256; String Length: 256 bytes; relative position: 24 LDR R6, Consta; reference data fields in the memory table Map 4096; the first address of the memory table is 4096 (0x1000) Consta field 4; Consta length is 4 bytes, relative position is 0 Constb field 4; constb length is 4 bytes, relative position is 4 X Field 8; x length 8 bytes, relative position 8 Y Field 8; y length is 8 by

Access Physical Address via Devmem

, [IP] MCR p15, 0, IP, C1, C0 @ Update control register#endif ENABLE_IRQ ... /* * Note: off_4k (r5) is always units of 4K. If we can‘t do the requested * offset, we return EINVAL. */sys_mmap2:#if PAGE_SHIFT > 12 tst r5, #PGOFF_MASK moveq r5, r5, lsr #PAGE_SHIFT - 12 streq

Android SDK Android ndk official download address (update and Version Download)

Android SDK Android ndk official Android SDK Windows Http://dl.google.com/android/android-sdk_r08-windows.zip Http://dl.google.com/android/installer_r08-windows.exe Linux (i386) Http://dl.google.com/android/android-sdk_r08-linux_86.tgz Mac OS X (Intel) Http://dl.google.com/android/android-sdk_r08-mac_86.zip Android ndk Windows Http://dl.google.com/android/ndk/android-ndk-r5-windows.zip Mac OS X (Intel) Http://dl.google.com/android/ndk/android-ndk-

Download Android Development sdk ndk and android development sdkndk

(intel) Http://dl.google.com/android/ndk/android-ndk-r5b-darwin-x86.tar.bz2 Linux Http://dl.google.com/android/ndk/android-ndk-r5b-linux-x86.tar.bz2 Android SDK: 3.0 Windows Http://dl.google.com/android/installer_r10-windows.exe Http://dl.google.com/android/android-sdk_r10-windows.zip Mac OS X (intel) Http://dl.google.com/android/android-sdk_r10-mac_x86.zip Linux (i386) Http://dl.google.com/android/android-sdk_r10-linux_x86.tgz Android SDK: 2.3 Windows Http://dl.google.com/android/android-sdk

Use of iOS multi-point connection, reverse protocol, and security

displayName: external input, such as: "Proteas-iPhone5s" between devices to exchange IDs need to be serialized, serialization method:-[MCPeerID serializedRepresentation] To sum up is: peerID = generate the first 9 bytes + displayName with The Decompilation Result Based on pid64: void * -[MCPeerID initWithDisplayName:](void * self, void * _cmd, void * arg2) { STK33 = r5; STK35 = r7; sp = sp - 0x28; r5

Key addresses when the ARM Linux kernel is started

. And set the kernel code entry address zrealaddr. . Text ADR r0, lc0 Ldmia r0, {R1, R2, R3, R4, R5, R6, IP, SP} . Type lc0, # object Lc0:. Word lc0 @ r1 . Word _ bss_start @ r2 . Word _ end @ r3 . Word zreladdr @ r4 . Word _ start @ R5 . Word _ got_start @ R6 . Word _ got_end @ IP . Word user_stack + 4096 @ sp The above code gets the entry address of the kernel code, which is saved in R4. /* * Check to s

Arm register Introduction

How many registers does the ARM processor contain? What registers are available in each mode? What are the functions of these registers? Let's learn about arm registers with these questions! I believe you will gain some benefits after reading this article.The ARM processor has 37 registers.It contains 31 General registers and 6 State registers. ========================================================== ========================================================== ========USR System Supervisor abort

CCNP Study Notes 4-route part-route control

ospf processes, r2 route entries will not change ◆ dual-point bidirectional redistribution issues (the problem does not occur in the MongoDB because of the internal 90, external 170) 1: sub-optimal path ---- solve by modifying the AD -- distance 2: loop --- solve by filtering -- distribute-list R1: F0/0 1. 1.12.1 F1/0 1.1.14.1 lo0 1.1.11.1R2: F0/0 1.1.23.2 F1/0 1.1.12.2 lo0 1.1.22.1R3: F0/0 1.1.23.3 F1/0 2.1.35.3R4: F0/0 1.1.14.4 S1/0 2.1.45.4R5: s1/0 2.1.45.5 F0/0 2.1.35.5 1, sub-optimal route

CCNP Learning note 7-routing Section--OSPF comprehensive question 2

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/77/A8/wKioL1ZqrkujOgEPAACGyTYrjpU740.png "title=" QQ picture 20151211190632.png "alt=" Wkiol1zqrkujogepaacgytyrjpu740.png "/>One, address description1,R1--R5 all want a loopback0=10.10.x.x2, R1--R3 E0 address =1.1.123.x3, the R2--r4 WAN interface is 1.1.234.X/244,r4-r5 WAN Interface =1.1.45.x/24Two, bridgingConfiguring the R1-R3 Ethernet AddressConf

Ucos system initialization and startup process

Os_schednew directly, because at this time the system is no task in the execution, there is no interruption lock, so it is important to note that before the system starts, it is best to leave only the system interruption, start and then open the interrupt, otherwise it may cause problemsThen still get the priority, get the TCB, and finally call the Osstarthighrdy function according to the current highest priority task, the function is a function that requires assembly language porting, in Os_cp

Android Reverse Tour---"Anti-debug" scenario resolution (additional modification of IDA Debug port and modification of kernel information)

everyone know more knowledge, would rather more detours, go many ways out. And the above way every time add-p more trouble, I would like to use another way to solve the problem at once, and I would like to be familiar with IDA in the process of use, using Ida to open the Android_server file, in fact, he is elf format, open stress-free, open after use shift+12 View the string content interface:Finding these three key string contents, we can detect the following message after running past Android

The NDK development of Android

enter gcc–version,g++--version,make–version,gdb–version for testing, and if you print out the version information and some descriptive information, the Cygwin installation is successful!3. Configure NDK Environment variablesAFirst find the Cygwin installation directory, find a home\b Open a. bash_profile file, add ndk=/cygdrive/Ndk=/cygdrive/e/android-ndk-r5Export NDKThe NDK name is random, for the convenience of later use, choose a short name, and then saveC Open Cygwin, enter the CD $NDK, and

Why the C language (function call) requires a stack, while assembly language does not require a heap

-inux-objdump–d u-boot > Dump_u-boot.txt Copy Code can get dump_u-boot.txt files. The file is the executable assembly code that contains the program in U-boot, In which we can see the C language function source code, in the end corresponds to those assembly code. The following is a two-function assembly code, One is Clock_init, The other is in the same C-source file as Clock_init, and another function Copycode2ram: 33D0091C 33d0091c:e92d4070 Push {r4, R5

Why does the assembler call the C function to set the stack? __php

Clock_init and the other is a function copycode2ram with clock_init in the same C source file: 33d0091c:copycode2ram: 33d0091c:e92d4070 push {r4, R5, R6, LR} 33d00920:e1a06000 mov r6, r0 33d00924:e1a05001 mov R5, R1 33d00928:e1a04002 mov r4, r2 33d0092c:ebffffef BL 33d008f0 b bootfrmnorflash ... 33d00984:ebffff14 bl 33d005dc nand_read_ll ... 33d009a8:e3a00000 mov r0, #0; 0x0 33d009ac:e8bd8070 P

ARM Foundation: Why C language (function call) need stack, but assembly language does not need to stack __ function

calls" related, APCs will have detailed agreement. Interested in their own to study. ) But if there are too many parameters and the registers are not enough, then you have to put the extra parameters in the stack. That is, you can use the stack to pass all the extra arguments that are not in place for the registers.3. An example of how the C language function call uses the stack The function of the stack for the above explanation is somewhat abstract, and here's an example to explain it easily:

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