define variable in the designated address space

There are probably numerous ways, but this is one that I have used:

uint32_t __attribute__((section("MySection"),zero_init)) MyInt;

Thank you for your reply!but I also have some question:
1ã€I want to define the whole data in the designated address space one by one,such as
#pragma section
int data1;
int data2;
. .
. the variable distribute the address automatic
so,how can I do?
2ã€if use your way,where define "MySection",what is mean about the "zero_init"?
Thank you very much again!

You can put the whole collection of items you want placed in a section within a structure. That also groups all the information into a logical unit.

The zero_init is used to force the linker to put the data into a section that is not initialized at startup, which is very useful for non volatile data. You might not need or want it.

Thank you very much!
I define the section in the sct like this:
RAM 0x20000000 0x7FFF
{ ADDER 0x7FFF { data_common.o(+RW) (foo) ; select section foo from data_common.o }
}

define the variable in the data_common.c like this:
#pragma arm section rwdata="foo"
int data=0;
#pragma arm section rwdata

but the variable address in the .map file not assigned to the correct address after compile:
Base Addr Size Type Attr Idx E Section Name Object

0x1fff8000 0x0000000c Data RW 605 .data main.o 0x1fff800c 0x00000004 Data RW 647 foo data_common.o

can you help me?Thank you!

I can see no reason for me to continue to give advice when you have chosen to do something other than what I have suggested.

It's over to you now.

I have tested the way you told me like this,but it not effective:
int__attribute__((section("foo"))) data;

define the section in the .sct like this :

RAM 0x20000000 0x7FFF
{ RAM_Data 0x20000000 0x7FFF { data_common.o(+RW) (foo) ; select section foo from data_common.o }
}

but the address in the .map didn't in the expect address:
data 0x1fff800c Data 4 data_common.o(foo)

so,if I define variable by this method,what can I do?
Thank you very much!