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Diffstat (limited to 'Documentation/bpf/instruction-set.rst')
| -rw-r--r-- | Documentation/bpf/instruction-set.rst | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst index 87f6ad62633a..03da88530172 100644 --- a/Documentation/bpf/instruction-set.rst +++ b/Documentation/bpf/instruction-set.rst @@ -215,23 +215,30 @@ The mode modifier is one of: BPF_IMM 0x00 used for 64-bit mov BPF_ABS 0x20 legacy BPF packet access BPF_IND 0x40 legacy BPF packet access - BPF_MEM 0x60 all normal load and store operations + BPF_MEM 0x60 regular load and store operations BPF_ATOMIC 0xc0 atomic operations ============= ===== ==================================== -BPF_MEM | <size> | BPF_STX means:: + +Regular load and store operations +--------------------------------- + +The ``BPF_MEM`` mode modifier is used to encode regular load and store +instructions that transfer data between a register and memory. + +``BPF_MEM | <size> | BPF_STX`` means:: *(size *) (dst_reg + off) = src_reg -BPF_MEM | <size> | BPF_ST means:: +``BPF_MEM | <size> | BPF_ST`` means:: *(size *) (dst_reg + off) = imm32 -BPF_MEM | <size> | BPF_LDX means:: +``BPF_MEM | <size> | BPF_LDX`` means:: dst_reg = *(size *) (src_reg + off) -Where size is one of: BPF_B or BPF_H or BPF_W or BPF_DW. +Where size is one of: ``BPF_B``, ``BPF_H``, ``BPF_W``, or ``BPF_DW``. Atomic operations ----------------- |