Contents

    1 About this Document
        1.1 Abstract
        1.2 Purpose.
        1.3 References
        1.4 Current status and anticipated changes
        1.5 Overview
            1.5.1 Low-Level Run-Time Binary Interface Standards
            1.5.2 Object File Binary Interface Standards.
            1.5.3 Source-Level Standards.
            1.5.4 Library Standards
            1.5.5 Change history
    2 Lower-level Binary interfaces
        2.1 Processor Architecture
            2.1.1 Control Registers in C-SKY V2.0
            2.1.2 Primary Data Type.
            2.1.3 Composite Data Type
        2.2 Function Calling Convention
            2.2.1 Register Assignments.
            2.2.2 Stack Frame Layout
            2.2.3 Argument Passing
            2.2.4 Variable Arguments.
            2.2.5 Return Values.
        2.3 Runtime Debugging Support
            2.3.1 Function Prologues in C-SKY V2.0.
            2.3.2 Stack Tracing
    3 High language Issures
        3.1 C preprocessor predefinitions.
        3.2 Inline assembly syntax
            3.2.1 Overview
            3.2.2 Basic usage
            3.2.3 Extended asm.
            3.2.4 Examples
        3.3 Name mapping.
    4 ELF file format
        4.1 ELF Header
        4.2 Section Layout.
            4.2.1 Section Alignment
            4.2.2 Section Attributs
            4.2.3 Special Sections.
        4.3 Symbol Table Format
        4.4 Relocation Information Format.
            4.4.1 Reclocation Fields
            4.4.2 Relocation Types
        4.5 Program Loading
        4.6 Dynamic Linking.
            4.6.1 Dynamic Section
            4.6.2 Global Offset Table.
            4.6.3 Function Address
            4.6.4 Procedure Linkage Table.
        4.7 PIC Examples
            4.7.1 Function proglogue for PIC
            4.7.2 Date Objects
            4.7.3 Function Call
            4.7.4 Branching
        4.8 Debugging Information Format.
            4.8.1 DWARF Register Numbers
    5 Runtime library
        5.1 Compiler assisted Libraries
        5.2 Floating Point Routines.
            5.2.1 Arithmetic functions
            5.2.2 Conversion functions
            5.2.3 Comparison functions
        5.3 Long Long integer Routines.
            5.3.1 Arithmetic functions
            5.3.2 Comparison functions
            5.3.3 Trapping Arithmetic Functions
            5.3.4 Bit Operations
    6 Assembly syntax and directives
        6.1 Section
        6.2 Input line lengths
        6.3 Syntax
            6.3.1 Preprocessing
            6.3.2 Symbols
            6.3.3 Constants
            6.3.4 Expressions
            6.3.5 Oprators and Precedence.
            6.3.6 Instruction Memonics.
            6.3.7 Instruction Arguments
        6.4 Assembler directives.
            6.4.1 .align abs-exp [, abs-exp].
            6.4.2 .ascii “string” {, “string”}
            6.4.3 .asciz “string” {, “string”}.
            6.4.4 .byte exp {, exp}
            6.4.5 .comm symbol, length [, align].
            6.4.6 .data.
            6.4.7 .double float {, float}.
        6.4.8 .equ symbol, expression
        6.4.9 .export symbol {, symbol}.
        6.4.10 .fill count [, size [, value]].
        6.4.11 .float float {, float}
        6.4.12 .ident “string”.
        6.4.13 .import symbol {, symbol}.
        6.4.14 .literals.
        6.4.15 .lcomm symbol, length [, alignment].
        6.4.16 .long exp {, exp}
        6.4.17 .section name [, “attributes”]
        6.4.18 .short exp {, exp}.
        6.4.19 .text
        6.4.20 .weak symbol [, symbol]
    6.5 Pseudo-Instructions

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