G.3 Predefined Target Types

Type definitions in the self-description can build up composite types from basic building blocks, but can not define fundamental types. Instead, standard identifiers are provided by GDB for the fundamental types. The currently supported types are:

bool

Boolean type, occupying a single bit.

int8

int16

int24

int32

int64

int128

Signed integer types holding the specified number of bits.

uint8

uint16

uint24

uint32

uint64

uint128

Unsigned integer types holding the specified number of bits.

code_ptr

data_ptr

Pointers to unspecified code and data. The program counter and any dedicated return address register may be marked as code pointers; printing a code pointer converts it into a symbolic address. The stack pointer and any dedicated address registers may be marked as data pointers.

ieee_half

Half precision IEEE floating point.

ieee_single

Single precision IEEE floating point.

ieee_double

Double precision IEEE floating point.

bfloat16

The 16-bit brain floating point format used e.g. by x86 and ARM.

arm_fpa_ext

The 12-byte extended precision format used by ARM FPA registers.

i387_ext

The 10-byte extended precision format used by x87 registers.

i386_eflags

32bit EFLAGS register used by x86.

i386_mxcsr

32bit MXCSR register used by x86.