__reg_bound_offset

Name:Attempts to improve var_off based on unsigned min/max information

Proto:static void __reg_bound_offset(struct bpf_reg_state *reg)

Type:void

Parameter:

Type	Parameter	Name
struct bpf_reg_state *	reg

1032

For scalar types (SCALAR_VALUE), this represents our knowledge of * the actual value. * For pointer types, this represents the variable part of the offset * from the pointed-to object, and is shared with all bpf_reg_states * with the same id as us. = Return a tnum representing numbers satisfying both @a and @b

**Caller**
Name	Describe
do_refine_retval_range
adjust_ptr_min_max_vals	Handles arithmetic on a pointer and a scalar: computes new min/max and var_off.* Caller should also handle BPF_MOV case separately.* If we return -EACCES, caller may want to try again treating pointer as a* scalar
adjust_scalar_min_max_vals	WARNING: This function does calculations on 64-bit values, but the actual* execution may occur on 32-bit values. Therefore, things like bitshifts* need extra checks in the 32-bit case.
reg_set_min_max	Adjusts the register min/max values in the case that the dst_reg is the* variable register that we are working on, and src_reg is a constant or we're* simply doing a BPF_K check.* In JEQ/JNE cases we also adjust the var_off values.
reg_set_min_max_inv	Same as above, but for the case that dst_reg holds a constant and src_reg is* the variable reg.
__reg_combine_min_max	Regs are known to be equal, so intersect their min/max/var_off

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