i use devcpp and borland c compiler....
asm {
mov ax,4 // (I/O Func.)
mov bx,1 // (Output func)
mov cx,&name // (address of the string)
mov dx,6 // (length of the string)
int 0x21 // system call
}
in the above code snippets i want to print a string with the help of assembly language... but how can i put the address of the string in register cx....
is there something wrong in code???
In computer programming, an inline assembler is a feature of some compilers that allows low-level code written in assembly language to be embedded within a program, among code that otherwise has been compiled from a higher-level language such as C or Ada.
Inline assembly (typically introduced by the asm keyword) gives the ability to embed assembly language source code within a C program. Unlike in C++, inline assembly is treated as an extension in C.
The asm keyword allows you to embed assembler instructions within C code. GCC provides two forms of inline asm statements. A basic asm statement is one with no operands (see Basic Asm), while an extended asm statement (see Extended Asm) includes one or more operands.
I don't have the Borland compiler on hand, so I might be misremembering its syntax, but have you tried this:
asm {
mov ax,4 // (I/O Func.)
mov bx,1 // (Output func)
lds cx,"Hello, world" // (address of the string)
mov dx,6 // (length of the string)
int 0x21 // system call
}
or this:
char msg[] = "Hello, world";
asm {
mov ax,4 // (I/O Func.)
mov bx,1 // (Output func)
lds cx, msg // (address of the string)
mov dx,6 // (length of the string)
int 0x21 // system call
}
edit: although this will compile (now that I've changed MOV to LDS), it will still throw an error at runtime. I'll try again...
Just put the variable name in there:
mov ax,4 // (I/O Func.)
mov bx,1 // (Output func)
mov cx,name // (address of the string)
mov dx,6 // (lenght of the string)
int 0x21 // system call
Disclaimer: I'm not too good at assembly.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With