some_variable a = 1;
BC_PUSH addr
BC_SET addr
BC_POPA get from stack intptr(addr) ( a = 1 )
Pseudo code to bytecode converter ?
Author
Hi everyone , i'll try to be quick ...
I'm looking for a tool (or something similar) that will convert
some pseudo script code into bytecode so i can actually study a little bit
better what's going on when , for example ,calling a function , or jumping outside of scope.
For example , it should be able to turn this code:
into this (just an example):
or something similar ...
Any ideas if such a thing exists ???
Quote:Original post by 3DgonewildIt is called a compiler, and the 'bytecode' it produces is assembly language [smile]
Any ideas if such a thing exists ???
Most compilers have an option to produce assembly, for gcc you provide the -S option on the command line, not sure about MSVC.
Quote:Original post by 3DgonewildEven some things as simple as calling a function do different things in different languages and on different platforms. For instance, a function call in C behaves differently from a function call in Objective Caml, and within the C language a __cdecl call is different from an __stdcall.
calling a function
As swiftcoder explains, most compilers provide a switch to output assembly instructions so you can look at them.
For MSVC you'd want the /FA family of switches. Generally I use /FAs to get intermixed assembly and source code, but you can also use /FAc to get the actual machine code.
Author
Thanks all for the replies , -S flag is exactly what i've been looking for!
Some quick tests :
int i = 22;->>>>>>>>>>>>>>>
.file "main.cpp".globl i .data .align 4 .type i, @object .size i, 4i: .long 22 .ident "GCC: (Ubuntu 4.3.2-1ubuntu11) 4.3.2" .section .note.GNU-stack,"",@progbitsvoid jmp_test(){ bool jmp = false; if(jmp) { int something_to_test_jmp = 1; }else{ int something_to_test_jmp = 0; }}->>>>>>>>>>>>>>>
.file "main.cpp" .text.globl _Z8jmp_testv .type _Z8jmp_testv, @function_Z8jmp_testv:.LFB2: pushl %ebp.LCFI0: movl %esp, %ebp.LCFI1: subl $16, %esp.LCFI2: movb $0, -1(%ebp) cmpb $0, -1(%ebp) je .L2 movl $1, -8(%ebp) jmp .L4.L2: movl $0, -12(%ebp).L4: leave ret.LFE2: .size _Z8jmp_testv, .-_Z8jmp_testv .ident "GCC: (Ubuntu 4.3.2-1ubuntu11) 4.3.2" .section .note.GNU-stack,"",@progbitsThis topic is closed to new replies.
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