SPRU513Y August 2001 – June 2022 SM320F28335-EP
The SECTIONS directive's GROUP option forces several output sections to be allocated contiguously and in the order listed, unless the UNORDERED operator is used. For example, assume that a section named term_rec contains a termination record for a table in the .data section. You can force the linker to allocate .data and term_rec together:
SECTIONS
{
.text /* Normal output section */
.ebss /* Normal output section */
GROUP 0x00001000 : /* Specify a group of sections */
{
.data /* First section in the group */
term_rec /* Allocated immediately after .data */
}
}You can use binding, alignment, or named memory to allocate a GROUP in the same manner as a single output section. In the preceding example, the GROUP is bound to address 0x1000. This means that .data is allocated at 0x1000, and term_rec follows it in memory.
The MEMORY directive also allows you to use the GROUP keyword to create logical groups of memory ranges for use with Cyclic Redundancy Checks (CRC). See Section 9.10.2 for how to compute CRCs over memory ranges using the GROUP syntax.