ARM assembly "retne" instruction

ARM assembly "retne" instruction

By : user2949723
Date : November 17 2020, 04:28 AM
Any of those help The architectural assembly language is one thing, real world code is another. Once assembler pseudo-ops and macros come into play, a familiarity with both the toolchain and the codebase in question helps a lot. Linux is particularly nasty as much of the assembly source contains multiple layers of both assembler macros and CPP macros. If you know what to look for, and follow the header trail to arch/arm/include/asm/assembler.h, you eventually find this complicated beast:
code :
.irp    c,,eq,ne,cs,cc,mi,pl,vs,vc,hi,ls,ge,lt,gt,le,hs,lo
.macro  ret\c, reg
#if __LINUX_ARM_ARCH__ < 6
        mov\c   pc, \reg
        .ifeqs  "\reg", "lr"
        bx\c    \reg
        mov\c   pc, \reg

Share : facebook icon twitter icon
How do you pass a string as an argument to the "call" instruction in inline assembly?

How do you pass a string as an argument to the "call" instruction in inline assembly?

By : Mago Pato
Date : March 29 2020, 07:55 AM
To fix this issue You can't, at least not directly.
call takes an address as a parameter. Even though you write "call functionName", the linker replaces functionname with the actual address of the function. You'd need to first map that string to its address. In general, C and C++ don't support any sort of runtime metadata about function name mappings that would allow for this. If the function is exported from a DLL, you can use GetProcAddress to find its address.
code :
std:map<string, PVOID> functionMappings;
functionMappings["MyFunction"] = MyFunction;

// Later

PVOID function = functionMappings["MyFunction"];

    push a;
    call [function]
What does "rep; nop;" mean in x86 assembly? Is it the same as the "pause" instruction?

What does "rep; nop;" mean in x86 assembly? Is it the same as the "pause" instruction?

By : user3425797
Date : March 29 2020, 07:55 AM
This might help you rep; nop is indeed the same as the pause instruction (opcode F390). It might be used for assemblers which don't support the pause instruction yet. On previous processors, this simply did nothing, just like nop but in two bytes. On new processors which support hyperthreading, it is used as a hint to the processor that you are executing a spinloop to increase performance. From Intel's instruction reference:
"Illegal instruction" on basic assembly program - not even hello world - why is linking needed?

"Illegal instruction" on basic assembly program - not even hello world - why is linking needed?

By : New Richmond
Date : March 29 2020, 07:55 AM
this will help You do need to link it to create an executable. By default, as just gives you an object file, which is something you can link into an executable (either with other object files or on its own) but is not itself a valid executable. Try:
code :
as -arch i386 -o file.o file.s
ld -o file file.o
as -arch i386 -o $1.o $1.s
ld -o $1 $1.o
How is the "update condition flags" S encoded in the 16-bit Thumb-2 assembly instruction set?

How is the "update condition flags" S encoded in the 16-bit Thumb-2 assembly instruction set?

By : Sujit Barua
Date : March 29 2020, 07:55 AM
Hope this helps Thumb doesn't use the S condition field for each instruction, so every instruction is unconditional (aside from the conditional branches, obviously). Part of the reduction from 32-bit ARM to 16-bit Thumb involved getting rid of it. The examples you provided shouldn't have the s to begin with, in my opinion (they don't get used in this manual).
Condition codes in Thumb are set implicitly by your ALU instructions (same as ARM), but to access them you need to use conditional branches.
x86 assembly extreme novice inquiry: "invalid instruction operands"?

x86 assembly extreme novice inquiry: "invalid instruction operands"?

By : Dmitrii HolmoGorov
Date : March 29 2020, 07:55 AM
wish helps you One possible solution would be to replace inputLoopCounter BYTE -1 by inputLoopCounter DWORD -1.
Related Posts Related Posts :
  • Linux file deleted recovery
  • Exchange columns in bash
  • How to set max file size in Linux CeNTOS to server.log
  • Regular expressions: Search a word and append a new word at the end of the line
  • Compress a set of log files in a folder depending on number of files
  • unexpected behavior of linux malloc
  • relation between init and bash terminal process
  • Matlab VideoReader codec error?
  • How to catch the L3-cache hits and misses by perf tool in Linux
  • Executable Deleting Itself on linux
  • How to change the apache httpd port for serving files
  • Installing Patches in linux
  • Comparative analysis between libkvm on linux and NetBSD
  • How to join multiple txt files into based on column?
  • setting LINK variable in Makefile generated by qmake (5.0)
  • Automake - difficulty with installing version 'automake-1.14.1'
  • How to use Linux Network Namespaces for per processes routing?
  • How can I write a Gruntfile with different shell command behaviour for OS X vs. Linux?
  • Using at command in shell script for scheduling a command
  • Is there a method to figure out the audio channel layout in Linux?
  • Setting environment varilable for daemon / root process
  • string replacement in shell script
  • Add specific column to the end of a CSV file
  • Are there programmable automount/autofs hooks in linux/systemd?
  • Renaming files like 20141207_190822.jpg to "2014-12-07 19.08.22.jpg" in linux or MacOS X
  • undocumented kernel boot parameter?
  • using wget to mirror a website with path and subfolder that have the same name
  • Using awk to find data matching date range in text file
  • Installing xorg-x11-devel package in SLES 11 SP2
  • Setting result of find to variable, which has variables within it
  • Maximum/Minimum physical address - Linux kernel
  • Freepbx custom context outbound route
  • memcpy implementation in linux kernel
  • How to reverse a list of words in a shell string?
  • Concatenate and pass as parameter in bash
  • Add user to Docker container
  • How to add a content in a file in linux without opening the file using vi or cat command
  • Which SVN subversion can I use on linux, Mac, Windows?
  • Work with ZIP archive at Bash
  • bash script not running as expected from cron vs. shell.
  • Compare one field, Remove duplicate if value of another field is greater
  • sudoers NOPASSWD: sudo: no tty present and no askpass program specified
  • How do I use pipes and variable substitution in a shell script (for toggling haproxy active server)?
  • Linux/Unix Find Command
  • Not able to copy data in hdfs with hdfs dfs commands
  • Linux : Remove/Delete .txt files ending with exactly five digits
  • Migrate from LXC to LXD
  • sbt on linux not accepting -jvm-debug 5005
  • Supervisord events only sent to one eventlistener in pool
  • Finding all .c files in linux using grep
  • Extract part of a file name in bash
  • Bash Script to Comment/uncomment lines in file
  • Linux audio control web alsamixer
  • Can't remove first two encode characters using text editors in linux
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org