函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\kasan\init.c Create Date:2022-07-27 17:25:47
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：zero_p4d_populate

函数原型：static int __ref zero_p4d_populate(pgd_t *pgd, unsigned long addr, unsigned long end)

返回类型：int

参数：

类型参数名称
pgd_t *pgd
unsigned longaddr
unsigned longend
186  p4d等于p4d_offset(pgd, addr)
189  循环
190  next等于p4d_addr_end(addr, end)
191  如果IS_ALIGNED(addr, P4D_SIZE)且end减addr大于等于P4D_SIZE则
195  p4d_populate( & For dynamically allocated mm_structs, there is a dynamically sized cpumask* at the end of the structure, the size of which depends on the maximum CPU* number the system can see, p4d, lm_alias(kasan_early_shadow_pud))
197  pud等于pud_offset(p4d, addr)
198  pud_populate( & For dynamically allocated mm_structs, there is a dynamically sized cpumask* at the end of the structure, the size of which depends on the maximum CPU* number the system can see, pud, lm_alias(kasan_early_shadow_pmd))
200  pmd等于pmd_offset(pud, addr)
201  pmd_populate_kernel( & For dynamically allocated mm_structs, there is a dynamically sized cpumask* at the end of the structure, the size of which depends on the maximum CPU* number the system can see, pmd, lm_alias(kasan_early_shadow_pte))
203  继续下一循环
206  如果The "p4d_xxx()" functions here are trivial for a folded two-level* setup: the pud is never bad, and a pud always exists (as it's folded* into the p4d entry)则
209  如果slab_is_available()则
213  否则
218  zero_pud_populate(p4d, addr, next)
219  当p4d自加, addr等于next, addr不等于end循环
221  返回:0
调用者
名称描述
kasan_populate_early_shadowkasan_populate_early_shadow - populate shadow memory region with* kasan_early_shadow_page*@shadow_start - start of the memory range to populate*@shadow_end - end of the memory range to populate