This table visualises the space of eBPF opcodes. It was generated by this hack
The *s represent opcodes that are exposed but not actually used, or used internally but not exposed
Note that there are gaps, but no empty columns.
There's also a prettier version here
| 0x00 | 0x01 | 0x02 | 0x03 | 0x04 | 0x05 | 0x06 | 0x07 |
------------------------------------------------------------------------------------------------------------------------------------------------------
| | | | | ALU_ADD_K | JMP_JA | | ALU64_ADD_K | 0x00
| | | | | ALU_ADD_X | | | ALU64_ADD_X | 0x08
| | | | | ALU_SUB_K | JMP_JEQ_K | JMP32_JEQ_K | ALU64_SUB_K | 0x10
| LD_IMM_DW | | | | ALU_SUB_X | JMP_JEQ_X | JMP32_JEQ_X | ALU64_SUB_X | 0x18
| LD_ABS_W* | LDX_PROBE_MEM_W*| | | ALU_MUL_K | JMP_JGT_K | JMP32_JGT_K | ALU64_MUL_K | 0x20
| LD_ABS_H* | LDX_PROBE_MEM_H*| | | ALU_MUL_X | JMP_JGT_X | JMP32_JGT_X | ALU64_MUL_X | 0x28
| LD_ABS_B* | LDX_PROBE_MEM_B*| | | ALU_DIV_K | JMP_JGE_K | JMP32_JGE_K | ALU64_DIV_K | 0x30
| | LDX_PROBE_MEM_DW| | | ALU_DIV_X | JMP_JGE_X | JMP32_JGE_X | ALU64_DIV_X | 0x38
| LD_IND_W* | | | | ALU_OR_K | JMP_JSET_K | JMP32_JSET_K | ALU64_OR_K | 0x40
| LD_IND_H* | | | | ALU_OR_X | JMP_JSET_X | JMP32_JSET_X | ALU64_OR_X | 0x48
| LD_IND_B* | | | | ALU_AND_K | JMP_JNE_K | JMP32_JNE_K | ALU64_AND_K | 0x50
| | | | | ALU_AND_X | JMP_JNE_X | JMP32_JNE_X | ALU64_AND_X | 0x58
| | LDX_MEM_W | ST_MEM_W | STX_MEM_W | ALU_LSH_K | JMP_JSGT_K | JMP32_JSGT_K | ALU64_LSH_K | 0x60
| | LDX_MEM_H | ST_MEM_H | STX_MEM_H | ALU_LSH_X | JMP_JSGT_X | JMP32_JSGT_X | ALU64_LSH_X | 0x68
| | LDX_MEM_B | ST_MEM_B | STX_MEM_B | ALU_RSH_K | JMP_JSGE_K | JMP32_JSGE_K | ALU64_RSH_K | 0x70
| | LDX_MEM_DW | ST_MEM_DW | STX_MEM_DW | ALU_RSH_X | JMP_JSGE_X | JMP32_JSGE_X | ALU64_RSH_X | 0x78
| | | | | ALU_NEG | JMP_CALL | | ALU64_NEG | 0x80
| | | | | | | | | 0x88
| | | | | ALU_MOD_K | JMP_EXIT | | ALU64_MOD_K | 0x90
| | | | | ALU_MOD_X | | | ALU64_MOD_X | 0x98
| | | | | ALU_XOR_K | JMP_JLT_K | JMP32_JLT_K | ALU64_XOR_K | 0xa0
| | | | | ALU_XOR_X | JMP_JLT_X | JMP32_JLT_X | ALU64_XOR_X | 0xa8
| | | | | ALU_MOV_K | JMP_JLE_K | JMP32_JLE_K | ALU64_MOV_K | 0xb0
| | | | | ALU_MOV_X | JMP_JLE_X | JMP32_JLE_X | ALU64_MOV_X | 0xb8
| | | | STX_XADD_W | ALU_ARSH_K | JMP_JSLT_K | JMP32_JSLT_K | ALU64_ARSH_K | 0xc0
| | | | | ALU_ARSH_X | JMP_JSLT_X | JMP32_JSLT_X | ALU64_ARSH_X | 0xc8
| | | | | ALU_END_TO_LE | JMP_JSLE_K | JMP32_JSLE_K | | 0xd0
| | | | STX_XADD_DW | ALU_END_TO_BE | JMP_JSLE_X | JMP32_JSLE_X | | 0xd8
| | | | | | JMP_CALL_ARGS* | | | 0xe0
| | | | | | | | | 0xe8
| | | | | | JMP_TAIL_CALL* | | | 0xf0
| | | | | | | | | 0xf8