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description Description of 'printf' function in HyperDbg Scripts

printf

Function

printf

Syntax

printf( Format, Expressions [...] );

Parameters

[Format-string]

     A printf-like format string.

[Expression] [...]

     [MASM-like expression\(s\)](https://docs.hyperdbg.com/commands/scripting-language/assumptions-and-evaluations) to evaluate, you can choose multiple expressions based on  the format string

Description

Evaluates and prints a printf-like format string with MASM expression(s).

{% hint style="danger" %} All the format specifiers should be in a lower-case format. {% endhint %}

Supported Format Specifiers

Specifier Description
%d Decimal signed integer
%i Decimal signed integer
%u Decimal unsigned integer
%o Octal integer
%x Hex integer
%c Character (char)
%p Pointer (void *)
%s String
%ws Wide-String
%ls Wide-String

Integer Format Specifiers (Long)

Specifier Description
%ld Long decimal signed integer
%li Long decimal signed integer
%lu Long decimal unsigned integer
%lo Long octal integer
%lx Long hex integer

Integer Format Specifiers (Long Long)

Specifier Description
%lld Long long (64-bit) decimal signed integer
%lli Long long (64-bit) decimal signed integer
%llu Long long (64-bit) decimal unsigned integer
%llo Long long (64-bit) octal integer
%llx Long long (64-bit) hex integer

Integer Format Specifiers (Short)

Specifier Description
%hd Short decimal signed integer
%hi Short decimal signed integer
%hu Short decimal unsigned integer
%ho Short octal integer
%hx Short hex integer

Examples

printf("Result is %s", @rcx);

Print data as an ASCII string pointed by rcx register.

print("The value is %llx and the string is : %ws "dq(@rcx), poi(rax));

Print and evaluate the above expressions. Note that %ws is a wide-string pointed by rax register. Also, the value of rcx register is also dereferenced and showed in quad-hex format.

{% hint style="success" %} You can see more examples here. {% endhint %}

Remarks

You should consider avoiding "unsafe" behavior in your expressions and strings.

Related

print