Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\verifier.c Create Date:2022-07-28 12:58:11
Last Modify:2022-05-19 20:02:10 Copyright©Brick
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Name:update_stack_depth

Proto:static int update_stack_depth(struct bpf_verifier_env *env, const struct bpf_func_state *func, int off)

Type:int

Parameter:

TypeParameterName
struct bpf_verifier_env *env
const struct bpf_func_state *func
intoff
2652  stack = max. stack depth used by this function
2654  If stack >= -off Then Return 0
2658  max. stack depth used by this function = -off
2659  Return 0
Caller
NameDescribe
check_mem_accessheck whether memory at (regno + off) is accessible for t = (read | write)* if t==write, value_regno is a register which value is stored into memory* if t==read, value_regno is a register which will receive the value from memory* if t==write &&
check_stack_boundarywhen register 'regno' is passed into function that will read 'access_size'* bytes from that pointer, make sure that it's within stack boundary* and all elements of stack are initialized