Code and data Placement Control by self-defind Section

 

declare in code via

• pragma
• @ 
• __attribute__   (GNU)

link control via xx.icf: ILINK Configuration File (链接配置文件)

 

Data Section

#pragma location = ".STCM"
int flag


u32 check_martix[] @ ".STCM" =
{
　　0x04,0x05,0x08,0x09,0x0C,0x0D,0x10,0x11,0x18,0x19,0x1C,0x1D,0x24,0x17,0x1A,0x1B,
　　0x1E,0x1F,0x22,0x23,0x26,0x27,0x2A,0x2B,0x2E,0x2F,0x32,0x33,0x36,0x37,0x3A,0x3B,
　　0x3E,0x3F,0x42,0x43,0x46,0x47,0x4A,0x4B,0x4E,0x4F,0x52,0x53,0x56,0x57,0x5A,0x5B,
　　0x5E,0x5F,0x62,0x63,0x66,0x67,0x6A,0x6B,0x6E,0x6F,0x72,0x73,0x76,0x77,0x7A,0x7B,
　　0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
}

//////////////////////////////////////////////////////////////////////////////////////////////
#pragma default_variable_attributes = @ ".STCM"
u32 var1;
u32 var2;
u32 var3;
#pragma default_variable_attributes =

#pragma data(".STCM")
u32 var1;
u32 var2;
u32 var3;
#pragma data()

 

define a region for place above .STCM section

　　define region SHARE_DATA_region = mem:[from 0x0x18000 to 0x183ff];
　　place at start of SHARE_DATA_region { readonly section .STCM };
　　place in SHARE_DATA_region { readonly section .STCM };

 

Code Section

 

#pragma location = ".SlowCode"
void func1()


void func1() @ ".SlowCode" {BODY;}


/////////////////////////////////////////////////////////
#pragma default_function_attributes = @ ".SlowCode"

void func1()
void func2()
void func3()

#pragma default_function_attributes =


#pragma code(".SlowCode")
void func1()
void func2()
void func3()
#pragma code()

 

 

define a region for place above .SlowCode section

　　define region SLOWCODE_region = mem:[from 0x08000000 to 0x08003FFF];
　　place in SLOWCODE_region { readonly section .SlowCode };