Function report |
Source Code:mm\mmap.c |
Create Date:2022-07-28 14:49:24 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:vma is the first one with address < vma->vm_start. Have to extend vma.
Proto:int expand_downwards(struct vm_area_struct *vma, unsigned long address)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct vm_area_struct * | vma | |
unsigned long | address |
2413 | error = 0 |
2416 | If address < mmap_min_addr Then Return -EPERM |
2422 | If prev && Not (Flags, see mm.h. & general info on the segment ) && Flags, see mm.h. & ( VM_WRITE | currently active flags | VM_EXEC) Then |
2424 | If address - The first byte after our end addresswithin vm_mm. < stack_guard_gap Then Return -ENOMEM |
2429 | If Value for the false possibility is greater at compile time(anon_vma_prepare(vma)) Then Return -ENOMEM |
2440 | If address < Our start address within vm_mm. Then |
2447 | If grow <= Offset (within vm_file) in PAGE_SIZEunits Then |
2448 | error = Verify that the stack growth is acceptable and* update accounting. This is shared with both the |
2449 | If Not error Then |
2462 | If Flags, see mm.h. & VM_LOCKED Then Pages that have PG_mlocked set += grow |
2464 | vm_stat_account(mm, Flags, see mm.h. , grow) |
2472 | perf_event_mmap(vma) |
2478 | validate_mm(mm) |
2479 | Return error |
Name | Describe |
---|---|
expand_stack |
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