I am building a lifter that translates armv7m assembly instructions into llvm IR. A sample of my C++ code is: IRBuilder<> builder(TheContext); //line 0 llvm::ConstantInt* I_0 = llvm::ConstantInt::get(TheContext, llvm::APInt(/nbits/32, 0, true)); //line 1 V = builder.CreateAlloca(Type::getInt32Ty(TheContext), nullptr, "V"); //line 2 Value* s3 = builder.CreateStore(I_0, V, /isVolatile=/false); //line 3 Value* loaded_V = builder.CreateLoad(V); //line 4 Value* ..
Category : armv7
A few days ago, i looked through the elf symbol table to compare strings to find a my function. I could find the target string well and I succeeded in getting the starting offset and size. However, when comparing this offset with the result of objdump, it can be seen that 1 byte is different. ..
Can I execute some code(asm -> hex) in the heap memory? The x86 architecture was successful, but armv8 failed. (tested on Android os) Is it because the code is not designed to run in the heap area in the ARM cpu? thanks for reading test code usinged char prefix[] = { 0xE0,0x01,0x80,0x42,0xc0,0x03,0x5F,0xD6}; // ARMv8 char ..
I am porting code from x86 to armv7. The code is consist of several custom libs: one of them is LibC, so I have my own implementation of memset and other similar functions. But I faced a crash on arm. class WindowFrameFake { public: WindowFrameFake(); ~WindowFrameFake() { } private: Vector<Button*> m_buttons1; Vector<Button*> m_buttons2; LG::Color m_color ..
I am cross-compiling C++ for armv7-m using arm-none-eabi tool-chain. However, I noticed that the tool chain included extra files from newlib/libc/stdlib which are not relevant to my project like fvwrite.c fvprint.c wcrtomb.c . Is there a compiler flag that can remove these extra includes and how to assure that they are irrelevant to my project ..
I am a beginner to NEON intrinsics, and I wanted to work with uint8x16_t and also uint8x16x4_t. While working with it I came across a situation, where I wanted to extract a byte from a uint8x16_t. Being naive to the details I accidentally began extracting bytes from it using the [] operator at runtime. But ..
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