SLAU131V User guide | 德州仪器 TI.com.cn

SLAU131V October 2004 – February 2020

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8.5.5.1 SECTIONS Directive Syntax

The SECTIONS directive is specified in a command file by the word SECTIONS (uppercase), followed by a list of output section specifications enclosed in braces.

The general syntax for the SECTIONS directive is:

SECTIONS
{
	name : [property [, property] [, property] . . . ]
	name : [property [, property] [, property] . . . ]
	name : [property [, property] [, property] . . . ]
}

Each section specification, beginning with name, defines an output section. (An output section is a section in the output file.) Section names can refer to sections, subsections, or archive library members. (See Section 8.5.5.4 for information on multi-level subsections.) After the section name is a list of properties that define the section's contents and how the section is allocated. The properties can be separated by optional commas. Possible properties for a section are as follows:

Load allocation defines where in memory the section is to be loaded. See Section 3.5, Section 3.1.1, and Section 8.5.6.
	Syntax:	load = allocation	or
		> allocation
Run allocation defines where in memory the section is to be run.
	Syntax:	run = allocation	or
		run > allocation
Input sections defines the input sections (object files) that constitute the output section. See Section 8.5.5.3.
	Syntax:	{ input_sections }
Section type defines flags for special section types. See Section 8.5.8.
	Syntax:	type = COPY	or
		type = DSECT	or
		type = NOLOAD	or
		type = VECT_INIT
Fill value defines the value used to fill uninitialized holes. See Section 8.5.11.
	Syntax:	fill = value

Example 5 shows a SECTIONS directive in a sample linker command file.