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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:
boolBoolean type, occupying a single bit.
int8int16int24int32int64int128Signed integer types holding the specified number of bits.
uint8uint16uint24uint32uint64uint128Unsigned integer types holding the specified number of bits.
code_ptrdata_ptrPointers 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_singleSingle precision IEEE floating point.
ieee_doubleDouble precision IEEE floating point.
arm_fpa_extThe 12-byte extended precision format used by ARM FPA registers.
i387_extThe 10-byte extended precision format used by x87 registers.
i386_eflags32bit EFLAGS register used by x86.
i386_mxcsr32bit MXCSR register used by x86.