Assembler Language Reference

.globl Pseudo-op

Purpose

Makes a symbol globally visible to the linker.

Syntax

Description

The .globl pseudo-op makes the symbol Name globally visible to the linker and available to any file that is linked to the file in which the .globl pseudo-op occurs.

• If the .globl pseudo-op is not used for a symbol, then that symbol is, unless otherwise effected, only visible within the current assembly and not to other modules that may later be linked to the current assembly. Alternately, the .extern or .weak pseudo-op can be used to effect visibility.
• If Name is defined in the current assembly, its type and value arise from that definition, not the .globl definition.
• The binder maps all common segments with the same name into the same memory. If the name is declared .globl and defined in one of the segments, this has the same effect as declaring the common symbols to be .globl in all segments. In this way, common memory can be initialized.

Parameters

Examples

The following example illustrates the use of the .globl pseudo-op:

   .globl main
main:
   .csect data[rw]
   .globl data[rw]

Related Information

Pseudo-ops Overview.

The .comm pseudo-op, .extern pseudo-op, and the .weak pseudo-op.