Reference Guide

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Chapter 3 Explains programming in Assembler for HP-UX.
Chapter 4 Describes the PA-RISC Assembler directives and
pseudo-operations.
Chapter 5 Summarizes the pseudo-instructions for the PA-RISC
machine instructions.
Chapter 6 Describes the assembly (as) command and the ways to
invoke the PA-RISC Assembler under the HP-UX
operating system.
Chapter 7 Contains several sample assembly language programs.
Chapter 8 Lists the diagnostic messages that the PA-RISC
Assembler can generate.
Summary of Technical Changes for HP-UX
11.0
The following features have changed for HP-UX 11.00 to support
PA-RISC 2.0W (wide), 64-bit mode. These changes are explained in detail
in the appropriate locations in this manual.
• In 64-bit mode, the linkage pointer register is %r27. See Table 2-11,
“Available Field Selectors,” on page 31.
• In 64-bit mode, the Executable and Linking Format (ELF) uses
segments and sections rather than spaces and subspaces. See
“Sections in 64-bit Mode” on page 44.
• The Assembler ignores the .CALL directive. This means that your
program must ensure that the caller and called procedure agree on
argument locations. See “.CALL Directive” on page 63.
• The .CALLINFO directive parameters include updates to support
64-bit mode.
• You can specify 2.0W with the .LEVEL directive to tell the the
Assembler to generate 64-bit object code. For details, see “.LEVEL
Directive” on page 93.
• New and changed Assembler error messages. For details, see Chapter
8, “Diagnostic Messages,” on page 141.