RTEMS | bsps/shared/acpi: Use vprintk for AcpiOsPrintf (!1483)

[Yang Zhang (@Chloe)]

Yang Zhang created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1483

Project:Branches: Chloe/rtems:fix-acpi-early-print to rtems/rtos/rtems:main
Author:   Yang Zhang



## Summary

bsps/shared/acpi: Use vprintk for AcpiOsPrintf

AcpiOsPrintf() and AcpiOsVprintf() used vprintf(), which relies on
standard I/O and newlib reentrancy structures.

When acpi_tables_initialize() is called from bsp_start(), the system
has not completed initialization and no thread is executing yet.
Calling vprintf() at this stage attempts to read libc_reent via a null
pointer, which on x86_64 targets causes a triple fault crash during boot.

Use vprintk() from <rtems/bspIo.h> instead of vprintf() to route ACPICA
OSL output through the early polled kernel character device.

Fixes #5751.


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