vystem-b/docs/shelter/irq/tss.md

TSS structure generation and loading

The TSS management is defined in shelter/lib/include/irq/tss.h and implemented in shelter/lib/include/irq/tss.c.

This implementation provides the following types:

• sh_tss_TSS: a full structure of a 64 bits TSS
• sh_tss_TR: a structure used to load the TSS

The following functions are provided:

• sh_tss_fill_tss(sh_tss_TSS *tss): fill a TSS structure with 4 stacks dedicated for double faults, NMI, page faults and stack-related faults. Heap must be available for using this function. All stacks are 4 pages long
• sh_tss_load_tr(sh_tss_TSS* tss): load the provided TSS into the task register. Always assume that the TSS selector in the GDT is 0x28