IAR linker copy code from FLASH to RAM during initialization - c

Question

I want to run code in RAM and use initialize copy by directives.
My .icf file is as follows:
define symbol __ICFEDIT_intvec_start__ = 0x08000000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
define symbol __ICFEDIT_region_ROM_end__ = 0x080007ff;
define symbol __ICFEDIT_region_ROM1_start__ = 0x08070000;
define symbol __ICFEDIT_region_ROM1_end__ = 0x0807FFFF;
define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
define symbol __ICFEDIT_region_RAM_end__ = 0x2000FFFF;
define symbol __ICFEDIT_size_cstack__ = 0x600;
define symbol __ICFEDIT_size_heap__ = 0x00;
/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__ = 0x600;
define symbol __ICFEDIT_size_heap__ = 0x00;
/**** End of ICF editor section. ###ICF###*/
define memory mem with size = 4G;
define region ROM_region = mem:[from __ICFEDIT_region_ROM_start__ to __ICFEDIT_region_ROM_end__];
define region ROM1_region = mem:[from __ICFEDIT_region_ROM1_start__ to __ICFEDIT_region_ROM1_end__];
define region RAM_region = mem:[from __ICFEDIT_region_RAM_start__ to __ICFEDIT_region_RAM_end__];
define block CSTACK with alignment = 8, size = __ICFEDIT_size_cstack__ { };
define block HEAP with alignment = 8, size = __ICFEDIT_size_heap__ { };
place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
do not initialize { section .noinit };
initialize by copy {readwrite};
initialize by copy {
object gd32f403_it.o,
object gd32f403_exti.o,
object gd32f403_fmc.o,
object gd32f403_gpio.o,
object gd32f403_misc.o,
object gd32f403_pmu.o,
object gd32f403_rcu.o,
object gd32f403_timer.o,
object gd32f403_usart.o,
object usb_delay.o,
object iap_core.o,
object usb_core.o,
object usbd_core.o,
object usbd_int.o,
object usbd_std.o,
object app.o ,
};
place in ROM_region {
readonly object system_gd32f403.o,
};
place in ROM1_region {
readonly object app.o ,
readonly object usb_delay.o,
readonly object iap_core.o,
readonly object gd32f403_it.o,
readonly object gd32f403_exti.o,
readonly object gd32f403_fmc.o,
readonly object gd32f403_gpio.o,
readonly object gd32f403_misc.o,
readonly object gd32f403_pmu.o,
readonly object gd32f403_rcu.o,
readonly object gd32f403_timer.o,
readonly object gd32f403_usart.o,
readonly object usb_core.o,
readonly object usbd_core.o,
readonly object usbd_int.o,
readonly object usbd_std.o,
readonly,
};
place in RAM_region {
readwrite,
block CSTACK, block HEAP,
};
export symbol __ICFEDIT_region_RAM_start__;
export symbol __ICFEDIT_region_RAM_end__;
But only gd32f403_gpio.o and gd32f403_misc.o execute in RAM and other objects still run in FLASH as shown in output .map files:
"P3", part 1 of 3: 0x54c
P3-1 0x20000000 0x54c <Init block>
...
.rodata inited 0x20000000 0x40 app.o [1]
.rodata inited 0x20000040 0x44 app.o [1]
.rodata inited 0x20000130 0x8 gd32f403_rcu.o [1]
.rodata inited 0x20000138 0x14 iap_core.o [1]
.rodata inited 0x2000014c 0x4 iap_core.o [1]
.text inited 0x20000150 0xc6 gd32f403_gpio.o [1]
.text inited 0x20000218 0xd0 gd32f403_misc.o [1]
.data inited 0x200002e8 0x120 app.o [1]
.data inited 0x20000408 0x30 iap_core.o [1]
.data inited 0x20000504 0x48 xfiles.o [3]
...
- 0x2000054c 0x54c
Why other objects such as app.o, gd32f403_usart.o have not been copied into RAM to execute?
Please!
What should I do if I want achieve the goal that copy code to RAM described in .icf file?

Answer 1

Sections that are needed for initialization are not affected by the initialize by copy
directive. This includes the __low_level_initfunction and anything it references.
Anything reachable from the programentry label is considered needed for initialization
unless reached via a section fragment with a label starting with __iar_init$$done.