install_breakpoint

Name:install_breakpoint

Proto:static int install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, struct vm_area_struct *vma, unsigned long vaddr)

Type:int

Parameter:

Type	Parameter	Name
struct uprobe *	uprobe
struct mm_struct *	mm
struct vm_area_struct *	vma
unsigned long	vaddr

913

ret = prepare_uprobe(uprobe, File we map to (can be NULL). , mm, vaddr)

914

If ret Then Return ret

921

first_uprobe = Not Determine whether a bit is set(has uprobes , & Must use atomic bitops to access )

922

If first_uprobe Then Atomically set a bit in memory

925

ret = set_swbp - store breakpoint at a given address.*@auprobe: arch specific probepoint information.*@mm: the probed process address space.*@vaddr: the virtual address to insert the opcode.* For mm @mm, store the breakpoint instruction at @vaddr.

926

If Not ret Then lear_bit - Clears a bit in memory*@nr: Bit to clear*@addr: Address to start counting from* This is a relaxed atomic operation (no implied memory barriers).

928

Else if first_uprobe Then lear_bit - Clears a bit in memory*@nr: Bit to clear*@addr: Address to start counting from* This is a relaxed atomic operation (no implied memory barriers).

931

Return ret

**Caller**
Name	Describe
register_for_each_vma
uprobe_mmap	Called from mmap_region/vma_adjust with mm->mmap_sem acquired.* Currently we ignore all errors and always return 0, the callers* can't handle the failure anyway.

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