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Fixed crash in initialize_context()

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Function tried to dereference a physical address, causing page fault
This commit is contained in:
ngiddings
2021-04-17 04:56:22 -05:00
parent 5c4a756176
commit 55c5db056e
1 changed files with 3 additions and 4 deletions
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7
src/x86/context.c
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@@ -4,13 +4,12 @@
void *initialize_context(void *task_entry, struct page_stack_t *page_stack) void *initialize_context(void *task_entry, struct page_stack_t *page_stack)
{ {
physaddr_t stack0 = reserve_page(page_stack); map_page(page_stack, (void*)0xFF7FF000, reserve_page(page_stack), PAGE_RW);
map_page(page_stack, (void*)0xFF7FF000, stack0, PAGE_RW); map_page(page_stack, (void*)0xFF7FD000, reserve_page(page_stack), PAGE_RW | PAGE_USERMODE);
map_page(page_stack, (void*)0xFF7FD000, stack0, PAGE_RW | PAGE_USERMODE);
unmap_page((void*)0xFF7FE000); unmap_page((void*)0xFF7FE000);
unmap_page((void*)0xFF7FC000); unmap_page((void*)0xFF7FC000);
uint32_t flags; uint32_t flags;
uint32_t *stack = (uint32_t*)((void*)stack0 - 20); uint32_t *stack = (uint32_t*)((void*)0xFF800000 - 20);
asm("pushf; " asm("pushf; "
"mov (%%esp), %0; " "mov (%%esp), %0; "
"popf; " "popf; "