define symbol __ICFEDIT_region_ITCMRAM_start__ = 0x00000000;
define symbol __ICFEDIT_region_ITCMRAM_end__   = 0x00003FFF;
define region ITCMRAM_region  = mem:[from __ICFEDIT_region_ITCMRAM_start__ to __ICFEDIT_region_ITCMRAM_end__];
define block ITCMRAM   with alignment = 8 { section .itcmram };
initialize by copy { readwrite, section .itcmram };
place in ITCMRAM_region {block ITCMRAM };

#pragma default_function_attributes = @ ".itcmram"
static void FilterTask( void * Param )
{
.....
}

#pragma default_function_attributes = @ ".itcmram"
void HAL_HCD_IRQHandler(HCD_HandleTypeDef *hhcd)
{
....
}

  place in ITCMRAM_region {block ITCMRAM };
  ^
"stm32f745xx_flash_sram.icf",50  Warning[Lp005]:
          placement includes a mix of sections with content (example "ro code s
          ection .itcmram in stm32f7xx_hal_hcd.o symbols: [HAL_HCD_GetCurrentFr
          ame, HAL_HCD_HC_GetURBState, HAL_HCD_ResetPort, HAL_HCD_Stop, HAL_HCD
          _Start, HAL_HCD_IRQHandler, HAL_HCD_HC_GetXferCount, HAL_HCD_GetCurre
          ntSpeed]") and sections without content (example "rw code section .it
          cmram in HalfBandFIR.o symbols: [FBI_Filter2X, FBI_Filter4X, FBI_Filt
          er8X]")

"P4":                                       0x21a0
  ITCMRAM                      0x00000000   0x21a0  <Block>
    Veneer            ro code  0x00000000      0x8  - Linker created -
    Veneer            ro code  0x00000008      0x8  - Linker created -
    Veneer            ro code  0x00000010      0x8  - Linker created -
    Veneer            ro code  0x00000018      0x8  - Linker created -
    Veneer            ro code  0x00000020      0x8  - Linker created -
    Veneer            ro code  0x00000028      0x8  - Linker created -
    .itcmram          ro code  0x00000030    0x71a  stm32f7xx_hal_hcd.o [1]
    Veneer            ro code  0x0000074c      0x8  - Linker created -
    .itcmram          ro code  0x00000754    0xb38  stm32f7xx_ll_usb.o [1]
    ITCMRAM-1                  0x0000128c    0xf14  <Init block>
      Veneer          inited   0x0000128c      0x8  - Linker created -
      .itcmram        inited   0x00001294     0x50  Filter.o [1]
      Veneer          inited   0x000012e4      0x8  - Linker created -
      .itcmram        inited   0x000012ec    0x6f0  HalfBandFIR.o [1]
      Veneer          inited   0x000019dc      0x8  - Linker created -
      Veneer          inited   0x000019e4      0x8  - Linker created -
      Veneer          inited   0x000019ec      0x8  - Linker created -
      .itcmram        inited   0x000019f4    0x224  heap_4.o [1]
      .itcmram        inited   0x00001c18    0x4d8  IFirInter.o [1]
      Veneer          inited   0x000020f0      0x8  - Linker created -
      Veneer          inited   0x000020f8      0x8  - Linker created -
      .itcmram        inited   0x00002100     0xa0  tasks.o [1]
                             - 0x000021a0   0x21a0