2dd69f5844
This allows us to easily track the physical memory so it can be freed when the thread exits. It also simplifies the page fault handler as it just needs to check regular mappings to find a user stack.
24 lines
581 B
C++
24 lines
581 B
C++
#include "memory/user_stack_manager.h"
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#include "debug/debug.h"
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#include "memory/paging_util.h"
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uint64_t UserStackManager::NewUserStack() {
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if (!freed_stacks_.empty()) {
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return freed_stacks_.PopFront();
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}
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next_stack_ -= kUserStackSize;
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uint64_t stack = next_stack_;
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if (stack <= kUserStackMin) {
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panic("Out of user stacks!");
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}
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return stack;
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}
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void UserStackManager::FreeUserStack(uint64_t stack_base) {
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if (stack_base & (kUserStackSize - 1)) {
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dbgln("WARN freeing unaligned user stack {x}", stack_base);
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}
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freed_stacks_.PushBack(stack_base);
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}
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