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A.1.2.2 Changing the area to be allocated using the -Xsection option

The -Xsection option can be used to change the default allocation section. The code size can be reduced by performing allocation to a section with high access efficiency.

 

(1)

Specify the default section type using the -Xsection option.

Example

Allocating to .sdata/.sbss section

>ccrh main.c -Xsection=data=gp_disp16

 

However, an error will be output at linkage if the variables do not fit in the section specified in (1). In this case, change the section of the variables in the C source file.

E0562330 : Relocation size overflow : "file"-"section"-"offset"

 

Example

Changing variables to .sdata23/.sbss23 section

int a = 1;              /* Allocated to the section specified in (1) */
int b;                  /* Allocated to the section specified in (1) */
#pragma section gp_disp23
int c = 1;              /* Allocated to the .sdata23 section */
int d;                  /* Allocated to the .sbss23 section */
#pragma section default
int e = 1;              /* Allocated to the section specified in (1) */
int f;                  /* Allocated to the section specified in (1) */