从指针到uint32的类型转换

Question

Iam going through a linker descriptor file and found following lines of code and I am unable to understand the typecasting concept used here.

extern std::uintptr_t   __sROData_LMA[]; /* start of LOAD region for DATA */
uint32_t * p_src, * p_dest;
#ifdef XMC_BOOT
    // Copy the rodata segment initializers from ROM to RAM.
    // Note that all data segments are aligned by 4.
    p_src  = static_cast<uint32_t *>(static_cast<void*>(__sROData_LMA));
    p_dest = static_cast<uint32_t *>(static_cast<void*>(__sROData));
    while (p_dest < static_cast<uint32_t*>(static_cast<void*>(__eROData)))
    {
        *p_dest++ = *p_src++;
    }
#endif

What does the line p_src = static_cast<uint32_t *>(static_cast<void*>(__sROData_LMA)); meant in the program? How is typecasting being done here? Thanks in advance.

Answer 1

The thing is, that you cannot dereference a void pointer, but a uint32_t pointer. The code itself is used for Copy the rodata segment initializers from ROM to RAM. , which is afaik required for ELF binaries. In fact, this is a mempcy .