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Simplify task switches

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No longer using the rsp from the entry to the kernel, but instead
switching rsp at task-switching time in assembly.

This currently breaks fork()
This commit is contained in:
Justin C. Miller
2019-03-31 22:49:24 -07:00
parent 5cdbedd4d1
commit ca2362f858
21 changed files with 311 additions and 178 deletions
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5
src/kernel/page_manager.cpp
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@@ -150,7 +150,7 @@ page_manager::delete_process_map(page_table *pml4)
void
page_manager::map_offset_pointer(void **pointer, size_t length)
{
log::info(logs::paging, "Mapping offset pointer region at %016lx size 0x%lx", *pointer, length);
log::debug(logs::paging, "Mapping offset pointer region at %016lx size 0x%lx", *pointer, length);
*pointer = kutil::offset_pointer(*pointer, page_offset);
}
@@ -185,6 +185,7 @@ page_manager::get_table_page()
free_page_header *page = m_page_cache;
m_page_cache = page->next;
return reinterpret_cast<page_table *>(page);
}
@@ -294,8 +295,10 @@ page_manager::check_needs_page(page_table *table, unsigned index, bool user)
void
page_manager::page_in(page_table *pml4, uintptr_t phys_addr, uintptr_t virt_addr, size_t count, bool user, bool large)
{
/*
log::debug(logs::paging, "page_in for table %016lx p:%016lx v:%016lx c:%4d u:%d l:%d",
pml4, phys_addr, virt_addr, count, user, large);
*/
page_table_indices idx{virt_addr};
page_table *tables[4] = {pml4, nullptr, nullptr, nullptr};