※ 引述《xinu (xinu)》之铭言： : ※ 引述《bizkit (有点期待)》之铭言： : : google: cross compilation : : http://www.speedblue.org/cross_compilation/ : 除了cross compile以外, 要看组合语言还要 : objdump反组译 : 以arm来看就是arm-linux-objdump -xDSl [executable] : 就可以看到用x86和arm在每一个source code编译成assembly有什麽不同 : 记得把-O设成不optimize可以清楚一点...应该是-O0 : 对了, 忘了说在gcc编译要加-g hi, 补充一下 gcc/g++ 编译的时候可以设定参数请他将过程保留下来 在编译的过程就留下assembly的版本 请看 man g++ objdump 好像也不需要搭配 -g 的参数 他可以用来给 gdb debug 但我并不了解他实际上是多留了什麽讯息 有人可以解惑吗:) == -save-temps Store the usual "temporary" intermediate files permanently; place them in the current directory and name them based on the source file. Thus, compiling foo.c with -c -save-temps would produce files foo.i and foo.s, as well as foo.o. This creates a prepro‐ cessed foo.i output file even though the compiler now normally uses an integrated preprocessor. ....[snip] = -g Produce debugging information in the operating system’s native for‐ mat (stabs, COFF, XCOFF, or DWARF 2). GDB can work with this debugging information. ....[snip] --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 220.132.58.176