25 lines
581 B
C++
25 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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