MEMORY
{
    TEXT (rx)       : ORIGIN = 0x00000000, LENGTH =  32K
    RAMVectorTable (rwx) : ORIGIN = 0x10000000, LENGTH = 256
    RAM (xrw)       : ORIGIN = 0x10000100, LENGTH =  0x1F00
}

    .IntVecTable :
    {
        *(.IntVecTable)
    } > RAMVectorTable

#define LPC11XX_VECTOR_QTY 47
typedef void (*ISRPtr) (void);
struct TLPC11xxVectorTable {
    ISRPtr StackPtr;// уже не нужен
    ISRPtr ResetISR;// уже не нужен
    ISRPtr Reserved0[9];
    ISRPtr SvcISR;
    ISRPtr Reserved1[2];
    ISRPtr PendSvcISR;
    ISRPtr SysTickISR;
    /* Device interrupt vectors */
    ISRPtr WakeUpISR[13];
    ISRPtr Reserved2;
    ISRPtr Ssp1ISR;
    ISRPtr I2cISR;
    ISRPtr Timer16_0_ISR;
    ISRPtr Timer16_1_ISR;
    ISRPtr Timer32_0_ISR;
    ISRPtr Timer32_1_ISR;
    ISRPtr Ssp0ISR;
    ISRPtr UART_ISR;
    ISRPtr Reserved3[2];
    ISRPtr ADC_ISR;
    ISRPtr Wdt_ISR;
    ISRPtr Bod_ISR;
    ISRPtr Reserved4;
    ISRPtr EINT3_ISR;
    ISRPtr EINT2_ISR;
    ISRPtr EINT1_ISR;
    ISRPtr EINT0_ISR;
    void SetDefault(ISRPtr default_handler);
};

#include "vector_table.h"
__attribute__ ((__section__(".IntVecTable")))
struct TLPC11xxVectorTable IntVecTable;

extern "C" void SVC_Handler(void);
extern "C" void PendSVC_ISR(void);
extern "C" void Default_Handler(void);

void InitVectorTable()
{
IntVecTable.SvcISR=&SVC_Handler;
IntVecTable.PendSvcISR=&PendSVC_ISR;
IntVecTable.SysTickISR=&OS::SystemTimer_ISR;
IntVecTable.Timer16_0_ISR=&Timer16_0_IRQ_Handler;
IntVecTable.UART_ISR=&UART_IRQ_Handler;
LPC_SYSCON->SYSMEMREMAP=1;
}

void TLPC11xxVectorTable::SetDefault(ISRPtr default_handler) {
ISRPtr *isr_ptr=&ResetISR;
for (uint8_t i=0; i<LPC11XX_VECTOR_QTY; i++)
*isr_ptr++=default_handler;
for (uint8_t i=0; i<9; i++)
Reserved0[i]=0;
Reserved4=
Reserved3[0]=Reserved3[1]=
Reserved2=
Reserved1[0]=Reserved1[1]=0;
}

int main()
{
IntVecTable.SetDefault(&Default_Handler);
InitVectorTable();
//....... код