Linux Standard Base Core Specification for IA32 2.1
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1.2. Data Representation

LSB-conforming applications shall use the data representation as defined in Chapter 3 of the System V ABI, IA32 Supplement.

1.2.1. Byte Ordering

See Chapter 3 of the System V ABI, IA32 Supplement.

1.2.2. Fundamental Types

In addition to the fundamental types specified in Chapter 3 of the System V ABI, IA32 Supplement, a 64 bit data type is defined here.

Table 1-1. Scalar Types

TypeCsizeofAlignment (bytes)IntelI386 Architecture
Integrallong long84signed double word
signed long long
unsigned long long84unsigned double word

1.2.3. Aggregates and Unions

See Chapter 3 of the System V ABI, IA32 Supplement.

1.2.4. Bit Fields

See Chapter 3 of the System V ABI, IA32 Supplement.

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