Invalid Entry Pointer When Compiling and Running Linux Port (64bit version)

[stevo01]

Description

When creating a ThreadX task and passing a pointer to the task's entry function, the pointer is cast to a 32-bit value (ULONG). However, on a 64-bit Linux system, the entry function expects a 64-bit value, resulting in an invalid pointer being passed and causing runtime errors.

• Target Linux, 64 Bit
• ThreadX v6.4.2, NetxDuo v6.
• environment: debian running insight wsl / 64 bit

This issue was observed in the NetX Duo sample code.

Sample

Thread creation:

tx_thread_create(&(ip_ptr->nx_ip_thread), name, _nx_ip_thread_entry, (ULONG)(ALIGN_TYPE)(ip_ptr),
                 memory_ptr, memory_size, priority, priority, 1, TX_AUTO_START);

Thread entry function:

VOID _nx_ip_thread_entry(ULONG ip_ptr_value)
{
...
}

Here, ip_ptr is cast to ULONG, which is 32-bit on some platforms, while the entry function expects a 64-bit value.

I solved the issue by compiling the application into a 32 bit version (compiler argument -m32) but I prefer the usage of 64 bit. Can anybody give me a hint how to fix that?

Steps to reproduce the behavior:

• Build the project using GCC 13.2.1 targeting Linux x86_64.
• Run the application.
• Observe runtime errors due to invalid pointer in thread entry.

Expected Behavior

The pointer passed to the thread entry function should be correctly interpreted as a 64-bit value, ensuring stable and correct execution.

Impact

This issue is a showstopper for running the Linux port reliably. It prevents correct thread initialization and leads to crashes or undefined behavior.