eBPF Instruction Set Specification, v1.0
draft-thaler-bpf-isa-01
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| Author | Dave Thaler | ||
| Last updated | 2023-07-26 (Latest revision 2023-07-10) | ||
| Replaced by | draft-ietf-bpf-isa, draft-ietf-bpf-isa | ||
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draft-thaler-bpf-isa-01
Network Working Group D. Thaler, Ed.
Internet-Draft Microsoft
Intended status: Standards Track 10 July 2023
Expires: 11 January 2024
eBPF Instruction Set Specification, v1.0
draft-thaler-bpf-isa-01
Abstract
This document specifies version 1.0 of the eBPF instruction set.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on 11 January 2024.
Copyright Notice
Copyright (c) 2023 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
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Table of Contents
1. Documentation conventions . . . . . . . . . . . . . . . . . . 2
2. Registers and calling convention . . . . . . . . . . . . . . 2
3. Instruction encoding . . . . . . . . . . . . . . . . . . . . 3
3.1. Instruction classes . . . . . . . . . . . . . . . . . . . 4
4. Arithmetic and jump instructions . . . . . . . . . . . . . . 5
4.1. Arithmetic instructions . . . . . . . . . . . . . . . . . 6
4.1.1. Byte swap instructions . . . . . . . . . . . . . . . 8
4.2. Jump instructions . . . . . . . . . . . . . . . . . . . . 9
4.2.1. Helper functions . . . . . . . . . . . . . . . . . . 10
4.2.2. Program-local functions . . . . . . . . . . . . . . . 11
5. Load and store instructions . . . . . . . . . . . . . . . . . 11
5.1. Regular load and store operations . . . . . . . . . . . . 12
5.2. Atomic operations . . . . . . . . . . . . . . . . . . . . 12
5.3. 64-bit immediate instructions . . . . . . . . . . . . . . 14
5.3.1. Maps . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3.2. Platform Variables . . . . . . . . . . . . . . . . . 16
5.4. Legacy BPF Packet access instructions . . . . . . . . . . 16
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
7. Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 31
1. Documentation conventions
For brevity, this document uses the type notion "u64", "u32", etc.
to mean an unsigned integer whose width is the specified number of
bits, and "s32", etc. to mean a signed integer of the specified
number of bits.
2. Registers and calling convention
eBPF has 10 general purpose registers and a read-only frame pointer
register, all of which are 64-bits wide.
The eBPF calling convention is defined as:
* R0: return value from function calls, and exit value for eBPF
programs
* R1 - R5: arguments for function calls
* R6 - R9: callee saved registers that function calls will preserve
* R10: read-only frame pointer to access stack
R0 - R5 are scratch registers and eBPF programs needs to spill/fill
them if necessary across calls.
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3. Instruction encoding
eBPF has two instruction encodings:
* the basic instruction encoding, which uses 64 bits to encode an
instruction
* the wide instruction encoding, which appends a second 64-bit
immediate (i.e., constant) value after the basic instruction for a
total of 128 bits.
The fields conforming an encoded basic instruction are stored in the
following order:
opcode:8 src_reg:4 dst_reg:4 offset:16 imm:32 // In little-endian BPF.
opcode:8 dst_reg:4 src_reg:4 offset:16 imm:32 // In big-endian BPF.
*imm* signed integer immediate value
*offset* signed integer offset used with pointer arithmetic
*src_reg* the source register number (0-10), except where otherwise
specified (64-bit immediate instructions (Section 5.3) reuse this
field for other purposes)
*dst_reg* destination register number (0-10)
*opcode* operation to perform
Note that the contents of multi-byte fields ('imm' and 'offset') are
stored using big-endian byte ordering in big-endian BPF and little-
endian byte ordering in little-endian BPF.
For example:
opcode offset imm assembly
src_reg dst_reg
07 0 1 00 00 44 33 22 11 r1 += 0x11223344 // little
dst_reg src_reg
07 1 0 00 00 11 22 33 44 r1 += 0x11223344 // big
Note that most instructions do not use all of the fields. Unused
fields shall be cleared to zero.
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As discussed below in 64-bit immediate instructions (Section 5.3), a
64-bit immediate instruction uses a 64-bit immediate value that is
constructed as follows. The 64 bits following the basic instruction
contain a pseudo instruction using the same format but with opcode,
dst_reg, src_reg, and offset all set to zero, and imm containing the
high 32 bits of the immediate value.
This is depicted in the following figure:
basic_instruction
.-----------------------------.
| |
code:8 regs:8 offset:16 imm:32 unused:32 imm:32
| |
'--------------'
pseudo instruction
Thus the 64-bit immediate value is constructed as follows:
| imm64 = (next_imm << 32) | imm
where 'next_imm' refers to the imm value of the pseudo instruction
following the basic instruction. The unused bytes in the pseudo
instruction are reserved and shall be cleared to zero.
3.1. Instruction classes
The three LSB bits of the 'opcode' field store the instruction class:
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+===========+=======+====================+==========================+
| class | value | description | reference |
+===========+=======+====================+==========================+
| BPF_LD | 0x00 | non-standard | Load and store |
| | | load operations | instructions (Section 5) |
+-----------+-------+--------------------+--------------------------+
| BPF_LDX | 0x01 | load into | Load and store |
| | | register | instructions (Section 5) |
| | | operations | |
+-----------+-------+--------------------+--------------------------+
| BPF_ST | 0x02 | store from | Load and store |
| | | immediate | instructions (Section 5) |
| | | operations | |
+-----------+-------+--------------------+--------------------------+
| BPF_STX | 0x03 | store from | Load and store |
| | | register | instructions (Section 5) |
| | | operations | |
+-----------+-------+--------------------+--------------------------+
| BPF_ALU | 0x04 | 32-bit | Arithmetic and jump |
| | | arithmetic | instructions (Section 4) |
| | | operations | |
+-----------+-------+--------------------+--------------------------+
| BPF_JMP | 0x05 | 64-bit jump | Arithmetic and jump |
| | | operations | instructions (Section 4) |
+-----------+-------+--------------------+--------------------------+
| BPF_JMP32 | 0x06 | 32-bit jump | Arithmetic and jump |
| | | operations | instructions (Section 4) |
+-----------+-------+--------------------+--------------------------+
| BPF_ALU64 | 0x07 | 64-bit | Arithmetic and jump |
| | | arithmetic | instructions (Section 4) |
| | | operations | |
+-----------+-------+--------------------+--------------------------+
Table 1
4. Arithmetic and jump instructions
For arithmetic and jump instructions (BPF_ALU, BPF_ALU64, BPF_JMP and
BPF_JMP32), the 8-bit 'opcode' field is divided into three parts:
+==============+========+===================+
| 4 bits (MSB) | 1 bit | 3 bits (LSB) |
+==============+========+===================+
| code | source | instruction class |
+--------------+--------+-------------------+
Table 2
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*code* the operation code, whose meaning varies by instruction class
*source* the source operand location, which unless otherwise
specified is one of:
+========+=======+================================================+
| source | value | description |
+========+=======+================================================+
| BPF_K | 0x00 | use 32-bit 'imm' value as source operand |
+--------+-------+------------------------------------------------+
| BPF_X | 0x08 | use 'src_reg' register value as source operand |
+--------+-------+------------------------------------------------+
Table 3
*instruction class* the instruction class (see Instruction classes
(Section 3.1))
4.1. Arithmetic instructions
BPF_ALU uses 32-bit wide operands while BPF_ALU64 uses 64-bit wide
operands for otherwise identical operations. The 'code' field
encodes the operation as below, where 'src' and 'dst' refer to the
values of the source and destination registers, respectively.
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+==========+=======+======================================+
| code | value | description |
+==========+=======+======================================+
| BPF_ADD | 0x00 | dst += src |
+----------+-------+--------------------------------------+
| BPF_SUB | 0x10 | dst -= src |
+----------+-------+--------------------------------------+
| BPF_MUL | 0x20 | dst *= src |
+----------+-------+--------------------------------------+
| BPF_DIV | 0x30 | dst = (src != 0) ? (dst / src) : 0 |
+----------+-------+--------------------------------------+
| BPF_OR | 0x40 | dst |= src |
+----------+-------+--------------------------------------+
| BPF_AND | 0x50 | dst &= src |
+----------+-------+--------------------------------------+
| BPF_LSH | 0x60 | dst <<= (src & mask) |
+----------+-------+--------------------------------------+
| BPF_RSH | 0x70 | dst >>= (src & mask) |
+----------+-------+--------------------------------------+
| BPF_NEG | 0x80 | dst = -src |
+----------+-------+--------------------------------------+
| BPF_MOD | 0x90 | dst = (src != 0) ? (dst % src) : dst |
+----------+-------+--------------------------------------+
| BPF_XOR | 0xa0 | dst ^= src |
+----------+-------+--------------------------------------+
| BPF_MOV | 0xb0 | dst = src |
+----------+-------+--------------------------------------+
| BPF_ARSH | 0xc0 | sign extending dst >>= (src & mask) |
+----------+-------+--------------------------------------+
| BPF_END | 0xd0 | byte swap operations (see Byte swap |
| | | instructions (Section 4.1.1) below) |
+----------+-------+--------------------------------------+
Table 4
Underflow and overflow are allowed during arithmetic operations,
meaning the 64-bit or 32-bit value will wrap. If eBPF program
execution would result in division by zero, the destination register
is instead set to zero. If execution would result in modulo by zero,
for BPF_ALU64 the value of the destination register is unchanged
whereas for BPF_ALU the upper 32 bits of the destination register are
zeroed.
BPF_ADD | BPF_X | BPF_ALU means:
dst = (u32) ((u32) dst + (u32) src)
where '(u32)' indicates that the upper 32 bits are zeroed.
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BPF_ADD | BPF_X | BPF_ALU64 means:
dst = dst + src
BPF_XOR | BPF_K | BPF_ALU means:
dst = (u32) dst ^ (u32) imm32
BPF_XOR | BPF_K | BPF_ALU64 means:
dst = dst ^ imm32
Also note that the division and modulo operations are unsigned.
Thus, for BPF_ALU, 'imm' is first interpreted as an unsigned 32-bit
value, whereas for BPF_ALU64, 'imm' is first sign extended to 64 bits
and the result interpreted as an unsigned 64-bit value. There are no
instructions for signed division or modulo.
Shift operations use a mask of 0x3F (63) for 64-bit operations and
0x1F (31) for 32-bit operations.
4.1.1. Byte swap instructions
The byte swap instructions use an instruction class of BPF_ALU and a
4-bit 'code' field of BPF_END.
The byte swap instructions operate on the destination register only
and do not use a separate source register or immediate value.
The 1-bit source operand field in the opcode is used to select what
byte order the operation convert from or to:
+===========+=======+===========================+
| source | value | description |
+===========+=======+===========================+
| BPF_TO_LE | 0x00 | convert between host byte |
| | | order and little endian |
+-----------+-------+---------------------------+
| BPF_TO_BE | 0x08 | convert between host byte |
| | | order and big endian |
+-----------+-------+---------------------------+
Table 5
The 'imm' field encodes the width of the swap operations. The
following widths are supported: 16, 32 and 64.
Examples:
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BPF_ALU | BPF_TO_LE | BPF_END with imm = 16 means:
dst = htole16(dst)
BPF_ALU | BPF_TO_BE | BPF_END with imm = 64 means:
dst = htobe64(dst)
4.2. Jump instructions
BPF_JMP32 uses 32-bit wide operands while BPF_JMP uses 64-bit wide
operands for otherwise identical operations. The 'code' field
encodes the operation as below:
+==========+=======+=====+=====================+===================+
| code | value | src | description | notes |
+==========+=======+=====+=====================+===================+
| BPF_JA | 0x0 | 0x0 | PC += offset | BPF_JMP only |
+----------+-------+-----+---------------------+-------------------+
| BPF_JEQ | 0x1 | any | PC += offset if dst | |
| | | | == src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JGT | 0x2 | any | PC += offset if dst | unsigned |
| | | | > src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JGE | 0x3 | any | PC += offset if dst | unsigned |
| | | | >= src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JSET | 0x4 | any | PC += offset if dst | |
| | | | & src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JNE | 0x5 | any | PC += offset if dst | |
| | | | != src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JSGT | 0x6 | any | PC += offset if dst | signed |
| | | | > src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JSGE | 0x7 | any | PC += offset if dst | signed |
| | | | >= src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_CALL | 0x8 | 0x0 | call helper | see Helper |
| | | | function by address | functions |
| | | | | (Section 4.2.1) |
+----------+-------+-----+---------------------+-------------------+
| BPF_CALL | 0x8 | 0x1 | call PC += offset | see Program-local |
| | | | | functions |
| | | | | (Section 4.2.2) |
+----------+-------+-----+---------------------+-------------------+
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| BPF_CALL | 0x8 | 0x2 | call helper | see Helper |
| | | | function by BTF ID | functions |
| | | | | (Section 4.2.1) |
+----------+-------+-----+---------------------+-------------------+
| BPF_EXIT | 0x9 | 0x0 | return | BPF_JMP only |
+----------+-------+-----+---------------------+-------------------+
| BPF_JLT | 0xa | any | PC += offset if dst | unsigned |
| | | | < src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JLE | 0xb | any | PC += offset if dst | unsigned |
| | | | <= src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JSLT | 0xc | any | PC += offset if dst | signed |
| | | | < src | |
+----------+-------+-----+---------------------+-------------------+
| BPF_JSLE | 0xd | any | PC += offset if dst | signed |
| | | | <= src | |
+----------+-------+-----+---------------------+-------------------+
Table 6
The eBPF program needs to store the return value into register R0
before doing a BPF_EXIT.
Example:
BPF_JSGE | BPF_X | BPF_JMP32 (0x7e) means:
if (s32)dst s>= (s32)src goto +offset
where 's>=' indicates a signed '>=' comparison.
4.2.1. Helper functions
Helper functions are a concept whereby BPF programs can call into a
set of function calls exposed by the underlying platform.
Historically, each helper function was identified by an address
encoded in the imm field. The available helper functions may differ
for each program type, but address values are unique across all
program types.
Platforms that support the BPF Type Format (BTF) support identifying
a helper function by a BTF ID encoded in the imm field, where the BTF
ID identifies the helper name and type.
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4.2.2. Program-local functions
Program-local functions are functions exposed by the same BPF program
as the caller, and are referenced by offset from the call
instruction, similar to BPF_JA. A BPF_EXIT within the program-local
function will return to the caller.
5. Load and store instructions
For load and store instructions (BPF_LD, BPF_LDX, BPF_ST, and
BPF_STX), the 8-bit 'opcode' field is divided as:
+==============+========+===================+
| 3 bits (MSB) | 2 bits | 3 bits (LSB) |
+==============+========+===================+
| mode | size | instruction class |
+--------------+--------+-------------------+
Table 7
The mode modifier is one of:
+============+=======+==================+=====================+
| mode | value | description | reference |
| modifier | | | |
+============+=======+==================+=====================+
| BPF_IMM | 0x00 | 64-bit immediate | 64-bit immediate |
| | | instructions | instructions |
| | | | (Section 5.3) |
+------------+-------+------------------+---------------------+
| BPF_ABS | 0x20 | legacy BPF | Legacy BPF Packet |
| | | packet access | access instructions |
| | | (absolute) | (Section 5.4) |
+------------+-------+------------------+---------------------+
| BPF_IND | 0x40 | legacy BPF | Legacy BPF Packet |
| | | packet access | access instructions |
| | | (indirect) | (Section 5.4) |
+------------+-------+------------------+---------------------+
| BPF_MEM | 0x60 | regular load and | Regular load and |
| | | store operations | store operations |
| | | | (Section 5.1) |
+------------+-------+------------------+---------------------+
| BPF_ATOMIC | 0xc0 | atomic | Atomic operations |
| | | operations | (Section 5.2) |
+------------+-------+------------------+---------------------+
Table 8
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The size modifier is one of:
+===============+=======+=======================+
| size modifier | value | description |
+===============+=======+=======================+
| BPF_W | 0x00 | word (4 bytes) |
+---------------+-------+-----------------------+
| BPF_H | 0x08 | half word (2 bytes) |
+---------------+-------+-----------------------+
| BPF_B | 0x10 | byte |
+---------------+-------+-----------------------+
| BPF_DW | 0x18 | double word (8 bytes) |
+---------------+-------+-----------------------+
Table 9
5.1. 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 + offset) = src
BPF_MEM | <size> | BPF_ST means:
*(size *) (dst + offset) = imm32
BPF_MEM | <size> | BPF_LDX means:
dst = *(size *) (src + offset)
Where size is one of: BPF_B, BPF_H, BPF_W, or BPF_DW.
5.2. Atomic operations
Atomic operations are operations that operate on memory and can not
be interrupted or corrupted by other access to the same memory region
by other eBPF programs or means outside of this specification.
All atomic operations supported by eBPF are encoded as store
operations that use the BPF_ATOMIC mode modifier as follows:
* BPF_ATOMIC | BPF_W | BPF_STX for 32-bit operations
* BPF_ATOMIC | BPF_DW | BPF_STX for 64-bit operations
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* 8-bit and 16-bit wide atomic operations are not supported.
The 'imm' field is used to encode the actual atomic operation.
Simple atomic operation use a subset of the values defined to encode
arithmetic operations in the 'imm' field to encode the atomic
operation:
+=========+=======+=============+
| imm | value | description |
+=========+=======+=============+
| BPF_ADD | 0x00 | atomic add |
+---------+-------+-------------+
| BPF_OR | 0x40 | atomic or |
+---------+-------+-------------+
| BPF_AND | 0x50 | atomic and |
+---------+-------+-------------+
| BPF_XOR | 0xa0 | atomic xor |
+---------+-------+-------------+
Table 10
BPF_ATOMIC | BPF_W | BPF_STX with 'imm' = BPF_ADD means:
*(u32 *)(dst + offset) += src
BPF_ATOMIC | BPF_DW | BPF_STX with 'imm' = BPF ADD means:
*(u64 *)(dst + offset) += src
In addition to the simple atomic operations, there also is a modifier
and two complex atomic operations:
+=============+==================+=============================+
| imm | value | description |
+=============+==================+=============================+
| BPF_FETCH | 0x01 | modifier: return old value |
+-------------+------------------+-----------------------------+
| BPF_XCHG | 0xe0 | BPF_FETCH | atomic exchange |
+-------------+------------------+-----------------------------+
| BPF_CMPXCHG | 0xf0 | BPF_FETCH | atomic compare and exchange |
+-------------+------------------+-----------------------------+
Table 11
The BPF_FETCH modifier is optional for simple atomic operations, and
always set for the complex atomic operations. If the BPF_FETCH flag
is set, then the operation also overwrites src with the value that
was in memory before it was modified.
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The BPF_XCHG operation atomically exchanges src with the value
addressed by dst + offset.
The BPF_CMPXCHG operation atomically compares the value addressed by
dst + offset with R0. If they match, the value addressed by dst +
offset is replaced with src. In either case, the value that was at
dst + offset before the operation is zero-extended and loaded back to
R0.
5.3. 64-bit immediate instructions
Instructions with the BPF_IMM 'mode' modifier use the wide
instruction encoding defined in Instruction encoding (Section 3), and
use the 'src' field of the basic instruction to hold an opcode
subtype.
The following table defines a set of BPF_IMM | BPF_DW | BPF_LD
instructions with opcode subtypes in the 'src' field, using new terms
such as "map" defined further below:
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+============+======+===+========================+========+=======+
|opcode |opcode|src|pseudocode |imm type|dst |
|construction| | | | |type |
+============+======+===+========================+========+=======+
|BPF_IMM | |0x18 |0x0|dst = imm64 |integer |integer|
|BPF_DW | | | | | | |
|BPF_LD | | | | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x1|dst = map_by_fd(imm) |map fd |map |
|BPF_DW | | | | | | |
|BPF_LD | | | | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x2|dst = |map fd |data |
|BPF_DW | | | |map_val(map_by_fd(imm)) | |pointer|
|BPF_LD | | |+ next_imm | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x3|dst = var_addr(imm) |variable|data |
|BPF_DW | | | | |id |pointer|
|BPF_LD | | | | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x4|dst = code_addr(imm) |integer |code |
|BPF_DW | | | | | |pointer|
|BPF_LD | | | | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x5|dst = map_by_idx(imm) |map |map |
|BPF_DW | | | | |index | |
|BPF_LD | | | | | |
+------------+------+---+------------------------+--------+-------+
|BPF_IMM | |0x18 |0x6|dst = |map |data |
|BPF_DW | | | |map_val(map_by_idx(imm))|index |pointer|
|BPF_LD | | |+ next_imm | | |
+------------+------+---+------------------------+--------+-------+
Table 12
where
* map_by_fd(imm) means to convert a 32-bit file descriptor into an
address of a map (see Maps (Section 5.3.1))
* map_by_idx(imm) means to convert a 32-bit index into an address of
a map
* map_val(map) gets the address of the first value in a given map
* var_addr(imm) gets the address of a platform variable (see
Platform Variables (Section 5.3.2)) with a given id
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* code_addr(imm) gets the address of the instruction at a specified
relative offset in number of (64-bit) instructions
* the 'imm type' can be used by disassemblers for display
* the 'dst type' can be used for verification and JIT compilation
purposes
5.3.1. Maps
Maps are shared memory regions accessible by eBPF programs on some
platforms. A map can have various semantics as defined in a separate
document, and may or may not have a single contiguous memory region,
but the 'map_val(map)' is currently only defined for maps that do
have a single contiguous memory region.
Each map can have a file descriptor (fd) if supported by the
platform, where 'map_by_fd(imm)' means to get the map with the
specified file descriptor. Each BPF program can also be defined to
use a set of maps associated with the program at load time, and
'map_by_idx(imm)' means to get the map with the given index in the
set associated with the BPF program containing the instruction.
5.3.2. Platform Variables
Platform variables are memory regions, identified by integer ids,
exposed by the runtime and accessible by BPF programs on some
platforms. The 'var_addr(imm)' operation means to get the address of
the memory region identified by the given id.
5.4. Legacy BPF Packet access instructions
eBPF previously introduced special instructions for access to packet
data that were carried over from classic BPF. However, these
instructions are deprecated and should no longer be used.
6. Acknowledgements
This draft was generated from instruction-set.rst in the Linux kernel
repository, to which a number of other individuals have authored
contributions over time, including Akhil Raj, Christoph Hellwig, Jose
E. Marchesi, Kosuke Fujimoto, Shahab Vahedi, Tiezhu Yang, and Zheng
Yejian, with review and suggestions by many others including Alan
Jowett, Alexei Starovoitov, Andrii Nakryiko, Daniel Borkmann, David
Vernet, Jim Harris, Quentin Monnet, Song Liu, Shung-Hsi Yu, Stanislav
Fomichev, and Yonghong Song.
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7. Appendix
For reference, the following table lists opcodes in order by value.
+========+=====+======+==========================+===============+
| opcode | src | imm |description | reference |
+========+=====+======+==========================+===============+
| 0x00 | 0x0 | any |(additional immediate | 64-bit |
| | | |value) | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x04 | 0x0 | any |dst = (u32)((u32)dst + | Arithmetic |
| | | |(u32)imm) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x05 | 0x0 | 0x00 |goto +offset | Jump |
| | | | | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x07 | 0x0 | any |dst += imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x0c | any | 0x00 |dst = (u32)((u32)dst + | Arithmetic |
| | | |(u32)src) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x0f | any | 0x00 |dst += src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x14 | 0x0 | any |dst = (u32)((u32)dst - | Arithmetic |
| | | |(u32)imm) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x15 | 0x0 | any |if dst == imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x16 | 0x0 | any |if (u32)dst == imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x17 | 0x0 | any |dst -= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
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| 0x18 | 0x0 | any |dst = imm64 | 64-bit |
| | | | | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x1 | any |dst = map_by_fd(imm) | 64-bit |
| | | | | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x2 | any |dst = | 64-bit |
| | | |mva(map_by_fd(imm)) + | immediate |
| | | |next_imm | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x3 | any |dst = variable_addr(imm) | 64-bit |
| | | | | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x4 | any |dst = code_addr(imm) | 64-bit |
| | | | | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x5 | any |dst = map_by_idx(imm) | 64-bit |
| | | | | immediate |
| | | | | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x18 | 0x6 | any |dst = | 64-bit |
| | | |mva(map_by_idx(imm)) + | immediate |
| | | |next_imm | instructions |
| | | | | (Section 5.3) |
+--------+-----+------+--------------------------+---------------+
| 0x1c | any | 0x00 |dst = (u32)((u32)dst - | Arithmetic |
| | | |(u32)src) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x1d | any | 0x00 |if dst == src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x1e | any | 0x00 |if (u32)dst == (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x1f | any | 0x00 |dst -= src | Arithmetic |
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| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x20 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x24 | 0x0 | any |dst = (u32)(dst * imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x25 | 0x0 | any |if dst > imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x26 | 0x0 | any |if (u32)dst > imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x27 | 0x0 | any |dst *= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x28 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x2c | any | 0x00 |dst = (u32)(dst * src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x2d | any | 0x00 |if dst > src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x2e | any | 0x00 |if (u32)dst > (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x2f | any | 0x00 |dst *= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x30 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
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| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x34 | 0x0 | any |dst = (u32)((imm != 0) ? | Arithmetic |
| | | |(dst / imm) : 0) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x35 | 0x0 | any |if dst >= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x36 | 0x0 | any |if (u32)dst >= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x37 | 0x0 | any |dst = (imm != 0) ? (dst | Arithmetic |
| | | |/ imm) : 0 | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x38 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x3c | any | 0x00 |dst = (u32)((imm != 0) ? | Arithmetic |
| | | |(dst / src) : 0) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x3d | any | 0x00 |if dst >= src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x3e | any | 0x00 |if (u32)dst >= (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x3f | any | 0x00 |dst = (src !+ 0) ? (dst | Arithmetic |
| | | |/ src) : 0 | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x40 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x44 | 0x0 | any |dst = (u32)(dst | imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
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| 0x45 | 0x0 | any |if dst & imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x46 | 0x0 | any |if (u32)dst & imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x47 | 0x0 | any |dst |= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x48 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x4c | any | 0x00 |dst = (u32)(dst | src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x4d | any | 0x00 |if dst & src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x4e | any | 0x00 |if (u32)dst & (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x4f | any | 0x00 |dst |= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x50 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x54 | 0x0 | any |dst = (u32)(dst & imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x55 | 0x0 | any |if dst != imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x56 | 0x0 | any |if (u32)dst != imm goto | Jump |
| | | |+offset | instructions |
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| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x57 | 0x0 | any |dst &= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x58 | any | any |(deprecated, | Legacy BPF |
| | | |implementation-specific) | Packet access |
| | | | | instructions |
| | | | | (Section 5.4) |
+--------+-----+------+--------------------------+---------------+
| 0x5c | any | 0x00 |dst = (u32)(dst & src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x5d | any | 0x00 |if dst != src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x5e | any | 0x00 |if (u32)dst != (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x5f | any | 0x00 |dst &= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x61 | any | 0x00 |dst = *(u32 *)(src + | Load and |
| | | |offset) | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x62 | 0x0 | any |*(u32 *)(dst + offset) = | Load and |
| | | |imm | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x63 | any | 0x00 |*(u32 *)(dst + offset) = | Load and |
| | | |src | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x64 | 0x0 | any |dst = (u32)(dst << imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x65 | 0x0 | any |if dst s> imm goto | Jump |
| | | |+offset | instructions |
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| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x66 | 0x0 | any |if (s32)dst s> (s32)imm | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x67 | 0x0 | any |dst <<= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x69 | any | 0x00 |dst = *(u16 *)(src + | Load and |
| | | |offset) | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x6a | 0x0 | any |*(u16 *)(dst + offset) = | Load and |
| | | |imm | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x6b | any | 0x00 |*(u16 *)(dst + offset) = | Load and |
| | | |src | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x6c | any | 0x00 |dst = (u32)(dst << src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x6d | any | 0x00 |if dst s> src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x6e | any | 0x00 |if (s32)dst s> (s32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x6f | any | 0x00 |dst <<= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x71 | any | 0x00 |dst = *(u8 *)(src + | Load and |
| | | |offset) | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x72 | 0x0 | any |*(u8 *)(dst + offset) = | Load and |
| | | |imm | store |
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| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x73 | any | 0x00 |*(u8 *)(dst + offset) = | Load and |
| | | |src | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x74 | 0x0 | any |dst = (u32)(dst >> imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x75 | 0x0 | any |if dst s>= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x76 | 0x0 | any |if (s32)dst s>= (s32)imm | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x77 | 0x0 | any |dst >>= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x79 | any | 0x00 |dst = *(u64 *)(src + | Load and |
| | | |offset) | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x7a | 0x0 | any |*(u64 *)(dst + offset) = | Load and |
| | | |imm | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x7b | any | 0x00 |*(u64 *)(dst + offset) = | Load and |
| | | |src | store |
| | | | | instructions |
| | | | | (Section 5) |
+--------+-----+------+--------------------------+---------------+
| 0x7c | any | 0x00 |dst = (u32)(dst >> src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x7d | any | 0x00 |if dst s>= src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x7e | any | 0x00 |if (s32)dst s>= (s32)src | Jump |
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| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x7f | any | 0x00 |dst >>= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x84 | 0x0 | 0x00 |dst = (u32)-dst | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x85 | 0x0 | any |call platform-agnostic | Helper |
| | | |helper function imm | functions |
| | | | | (Section |
| | | | | 4.2.1) |
+--------+-----+------+--------------------------+---------------+
| 0x85 | 0x1 | any |call PC += offset | Program-local |
| | | | | functions |
| | | | | (Section |
| | | | | 4.2.2) |
+--------+-----+------+--------------------------+---------------+
| 0x85 | 0x2 | any |call platform-specific | Helper |
| | | |helper function imm | functions |
| | | | | (Section |
| | | | | 4.2.1) |
+--------+-----+------+--------------------------+---------------+
| 0x87 | 0x0 | 0x00 |dst = -dst | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x94 | 0x0 | any |dst = (u32)((imm != 0) ? | Arithmetic |
| | | |(dst % imm) : dst) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x95 | 0x0 | 0x00 |return | Jump |
| | | | | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0x97 | 0x0 | any |dst = (imm != 0) ? (dst | Arithmetic |
| | | |% imm) : dst | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x9c | any | 0x00 |dst = (u32)((src != 0) ? | Arithmetic |
| | | |(dst % src) : dst) | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0x9f | any | 0x00 |dst = (src != 0) ? (dst | Arithmetic |
| | | |% src) : dst | instructions |
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| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xa4 | 0x0 | any |dst = (u32)(dst ^ imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xa5 | 0x0 | any |if dst < imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xa6 | 0x0 | any |if (u32)dst < imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xa7 | 0x0 | any |dst ^= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xac | any | 0x00 |dst = (u32)(dst ^ src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xad | any | 0x00 |if dst < src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xae | any | 0x00 |if (u32)dst < (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xaf | any | 0x00 |dst ^= src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xb4 | 0x0 | any |dst = (u32) imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xb5 | 0x0 | any |if dst <= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xa6 | 0x0 | any |if (u32)dst <= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xb7 | 0x0 | any |dst = imm | Arithmetic |
| | | | | instructions |
Thaler Expires 11 January 2024 [Page 26]
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| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xbc | any | 0x00 |dst = (u32) src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xbd | any | 0x00 |if dst <= src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xbe | any | 0x00 |if (u32)dst <= (u32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xbf | any | 0x00 |dst = src | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x00 |lock *(u32 *)(dst + | Atomic |
| | | |offset) += src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x01 |lock: | Atomic |
| | | | | operations |
| | | | *(u32 *)(dst + offset) += src| (Section 5.2) |
| | | | src = *(u32 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x40 |*(u32 *)(dst + | Atomic |
| | | |offset) |= src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x41 |lock: | Atomic |
| | | | | operations |
| | | | *(u32 *)(dst + offset) |= src| (Section 5.2) |
| | | | src = *(u32 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x50 |*(u32 *)(dst + offset) | Atomic |
| | | |&= src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0x51 |lock: | Atomic |
| | | | | operations |
| | | | *(u32 *)(dst + offset) &= src| (Section 5.2) |
| | | | src = *(u32 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0xa0 |*(u32 *)(dst + offset) | Atomic |
| | | |^= src | operations |
| | | | | (Section 5.2) |
Thaler Expires 11 January 2024 [Page 27]
Internet-Draft eBPF ISA July 2023
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0xa1 |lock: | Atomic |
| | | | | operations |
| | | | *(u32 *)(dst + offset) ^= src| (Section 5.2) |
| | | | src = *(u32 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0xe1 |lock: | Atomic |
| | | | | operations |
| | | | temp = *(u32 *)(dst + offset)| (Section 5.2) |
| | | | *(u32 *)(dst + offset) = src| |
| | | | src = temp | |
+--------+-----+------+--------------------------+---------------+
| 0xc3 | any | 0xf1 |lock: | Atomic |
| | | | | operations |
| | | | temp = *(u32 *)(dst + offset)| (Section 5.2) |
| | | | if *(u32)(dst + offset) == R0| |
| | | | *(u32)(dst + offset) = src| |
| | | | R0 = temp | |
+--------+-----+------+--------------------------+---------------+
| 0xc4 | 0x0 | any |dst = (u32)(dst s>> imm) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xc5 | 0x0 | any |if dst s< imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xc6 | 0x0 | any |if (s32)dst s< (s32)imm | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xc7 | 0x0 | any |dst s>>= imm | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xcc | any | 0x00 |dst = (u32)(dst s>> src) | Arithmetic |
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xcd | any | 0x00 |if dst s< src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xce | any | 0x00 |if (s32)dst s< (s32)src | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xcf | any | 0x00 |dst s>>= src | Arithmetic |
Thaler Expires 11 January 2024 [Page 28]
Internet-Draft eBPF ISA July 2023
| | | | | instructions |
| | | | | (Section 4.1) |
+--------+-----+------+--------------------------+---------------+
| 0xd4 | 0x0 | 0x10 |dst = htole16(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xd4 | 0x0 | 0x20 |dst = htole32(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xd4 | 0x0 | 0x40 |dst = htole64(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xd5 | 0x0 | any |if dst s<= imm goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xd6 | 0x0 | any |if (s32)dst s<= (s32)imm | Jump |
| | | |goto +offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0x00 |lock *(u64 *)(dst + | Atomic |
| | | |offset) += src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0x01 |lock: | Atomic |
| | | | | operations |
| | | | *(u64 *)(dst + offset) += src| (Section 5.2) |
| | | | src = *(u64 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0x40 |*(u64 *)(dst + | Atomic |
| | | |offset) |= src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0x41 |lock: | Atomic |
| | | | | operations |
| | | | *(u64 *)(dst + offset) |= src| (Section 5.2) |
| | | | lock src = *(u64 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0x50 |*(u64 *)(dst + offset) | Atomic |
| | | |&= src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
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Internet-Draft eBPF ISA July 2023
| 0xdb | any | 0x51 |lock: | Atomic |
| | | | | operations |
| | | | *(u64 *)(dst + offset) &= src| (Section 5.2) |
| | | | src = *(u64 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0xa0 |*(u64 *)(dst + offset) | Atomic |
| | | |^= src | operations |
| | | | | (Section 5.2) |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0xa1 |lock: | Atomic |
| | | | | operations |
| | | | *(u64 *)(dst + offset) ^= src| (Section 5.2) |
| | | | src = *(u64 *)(dst + offset)| |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0xe1 |lock: | Atomic |
| | | | | operations |
| | | | temp = *(u64 *)(dst + offset)| (Section 5.2) |
| | | | *(u64 *)(dst + offset) = src| |
| | | | src = temp | |
+--------+-----+------+--------------------------+---------------+
| 0xdb | any | 0xf1 |lock: | Atomic |
| | | | | operations |
| | | | temp = *(u64 *)(dst + offset)| (Section 5.2) |
| | | | if *(u64)(dst + offset) == R0| |
| | | | *(u64)(dst + offset) = src| |
| | | | R0 = temp | |
+--------+-----+------+--------------------------+---------------+
| 0xdc | 0x0 | 0x10 |dst = htobe16(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xdc | 0x0 | 0x20 |dst = htobe32(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xdc | 0x0 | 0x40 |dst = htobe64(dst) | Byte swap |
| | | | | instructions |
| | | | | (Section |
| | | | | 4.1.1) |
+--------+-----+------+--------------------------+---------------+
| 0xdd | any | 0x00 |if dst s<= src goto | Jump |
| | | |+offset | instructions |
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
| 0xde | any | 0x00 |if (s32)dst s<= (s32)src | Jump |
| | | |goto +offset | instructions |
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Internet-Draft eBPF ISA July 2023
| | | | | (Section 4.2) |
+--------+-----+------+--------------------------+---------------+
Table 13
Author's Address
Dave Thaler (editor)
Microsoft
Redmond, WA 98052
United States of America
Email: dthaler@microsoft.com
Thaler Expires 11 January 2024 [Page 31]