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🆕 malloc 、printf

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This commit is contained in:
fslongjin
2022-05-07 13:46:23 +08:00
parent 78a219b715
commit fd0147e04c
29 changed files with 1587 additions and 56 deletions
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8
kernel/mm/mm.c
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@ -680,13 +680,15 @@ void mm_map_proc_page_table(ul proc_page_table_addr, bool is_phys, ul virt_addr_
uint64_t mm_do_brk(uint64_t old_brk_end_addr, int64_t offset)
{
// 暂不支持缩小堆内存
if(offset <0)
if (offset < 0)
return old_brk_end_addr;
uint64_t end_addr = old_brk_end_addr + offset;
for (uint64_t i = old_brk_end_addr; i < end_addr; i += PAGE_2M_SIZE)
mm_map_proc_page_table(current_pcb->mm->pgd, true, i, alloc_pages(ZONE_NORMAL, 1, PAGE_PGT_MAPPED), PAGE_2M_SIZE, PAGE_USER_PAGE, true);
{
kdebug("map [%d]", i);
mm_map_proc_page_table((uint64_t)current_pcb->mm->pgd, true, i, alloc_pages(ZONE_NORMAL, 1, PAGE_PGT_MAPPED)->addr_phys, PAGE_2M_SIZE, PAGE_USER_PAGE, true);
}
current_pcb->mm->brk_end = end_addr;
return end_addr;
}