Module solana_rbpf::ebpf

This module contains all the definitions related to eBPF, and some functions permitting to manipulate eBPF instructions.

The number of bytes in an instruction, the maximum number of instructions in a program, and also all operation codes are defined here as constants.

The structure for an instruction used by this crate, as well as the function to extract it from a program, is also defined in the module.

To learn more about these instructions, see the Linux kernel documentation: https://www.kernel.org/doc/Documentation/networking/filter.txt, or for a shorter version of the list of the operation codes: https://github.com/iovisor/bpf-docs/blob/master/eBPF.md

Structs

Insn	An eBPF instruction.

Constants

ADD32_IMM	BPF opcode: add32 dst, imm /// dst += imm.
ADD32_REG	BPF opcode: add32 dst, src /// dst += src.
ADD64_IMM	BPF opcode: add64 dst, imm /// dst += imm.
ADD64_REG	BPF opcode: add64 dst, src /// dst += src.
AND32_IMM	BPF opcode: and32 dst, imm /// dst &= imm.
AND32_REG	BPF opcode: and32 dst, src /// dst &= src.
AND64_IMM	BPF opcode: and64 dst, imm /// dst &= imm.
AND64_REG	BPF opcode: and64 dst, src /// dst &= src.
ARSH32_IMM	BPF opcode: arsh32 dst, imm /// dst >>= imm (arithmetic).
ARSH32_REG	BPF opcode: arsh32 dst, src /// dst >>= src (arithmetic).
ARSH64_IMM	BPF opcode: arsh64 dst, imm /// dst >>= imm (arithmetic).
ARSH64_REG	BPF opcode: arsh64 dst, src /// dst >>= src (arithmetic).
BE	BPF opcode: be dst /// dst = htobe<imm>(dst), with imm in {16, 32, 64}.
BPF_ABS	BPF mode modifier: absolute load.
BPF_ADD	BPF ALU/ALU64 operation code: addition.
BPF_ALU	BPF operation class: 32 bits arithmetic operation.
BPF_ALU64	BPF operation class: 64 bits arithmetic operation.
BPF_ALU_OP_MASK	Mask to extract the arithmetic operation code from an instruction operation code.
BPF_AND	BPF ALU/ALU64 operation code: and.
BPF_ARSH	BPF ALU/ALU64 operation code: sign extending right shift.
BPF_B	BPF size modifier: byte (1 byte).
BPF_CALL	BPF JMP operation code: syscall function call.
BPF_CLS_MASK	Mask to extract the operation class from an operation code.
BPF_DIV	BPF ALU/ALU64 operation code: division.
BPF_DW	BPF size modifier: double word (8 bytes).
BPF_END	BPF ALU/ALU64 operation code: endianness conversion.
BPF_EXIT	BPF JMP operation code: return from program.
BPF_H	BPF size modifier: half-word (2 bytes).
BPF_IMM	BPF mode modifier: immediate value.
BPF_IND	BPF mode modifier: indirect load.
BPF_JA	BPF JMP operation code: jump.
BPF_JEQ	BPF JMP operation code: jump if equal.
BPF_JGE	BPF JMP operation code: jump if greater or equal.
BPF_JGT	BPF JMP operation code: jump if greater than.
BPF_JLE	BPF JMP operation code: jump if lower or equal.
BPF_JLT	BPF JMP operation code: jump if lower than.
BPF_JMP	BPF operation class: jump.
BPF_JNE	BPF JMP operation code: jump if not equal.
BPF_JSET	BPF JMP operation code: jump if src & reg.
BPF_JSGE	BPF JMP operation code: jump if greater or equal (signed).
BPF_JSGT	BPF JMP operation code: jump if greater than (signed).
BPF_JSLE	BPF JMP operation code: jump if lower or equal (signed).
BPF_JSLT	BPF JMP operation code: jump if lower than (signed).
BPF_K	BPF source operand modifier: 32-bit immediate value.
BPF_LD	BPF operation class: load from immediate.
BPF_LDX	BPF operation class: load from register.
BPF_LSH	BPF ALU/ALU64 operation code: left shift.
BPF_MEM	BPF mode modifier: load from / store to memory.
BPF_MOD	BPF ALU/ALU64 operation code: modulus.
BPF_MOV	BPF ALU/ALU64 operation code: move.
BPF_MUL	BPF ALU/ALU64 operation code: multiplication.
BPF_NEG	BPF ALU/ALU64 operation code: negation.
BPF_OR	BPF ALU/ALU64 operation code: or.
BPF_RSH	BPF ALU/ALU64 operation code: right shift.
BPF_ST	BPF operation class: store immediate.
BPF_STX	BPF operation class: store value from register.
BPF_SUB	BPF ALU/ALU64 operation code: subtraction.
BPF_W	BPF size modifier: word (4 bytes).
BPF_X	BPF source operand modifier: src register.
BPF_XADD	BPF mode modifier: exclusive add.
BPF_XOR	BPF ALU/ALU64 operation code: exclusive or.
CALL_IMM	BPF opcode: call imm /// syscall function call to syscall with key imm.
CALL_REG	BPF opcode: tail call.
DIV32_IMM	BPF opcode: div32 dst, imm /// dst /= imm.
DIV32_REG	BPF opcode: div32 dst, src /// dst /= src.
DIV64_IMM	BPF opcode: div64 dst, imm /// dst /= imm.
DIV64_REG	BPF opcode: div64 dst, src /// dst /= src.
ELF_INSN_DUMP_OFFSET	ELF dump instruction offset Instruction numbers typically start at 29 in the ELF dump, use this offset when reporting so that trace aligns with the dump.
EXIT	BPF opcode: exit /// return r0.
FIRST_SCRATCH_REG	First scratch register
HOST_ALIGN	Alignment of the memory regions in host address space in bytes
INSN_SIZE	Size of an eBPF instructions, in bytes.
JA	BPF opcode: ja +off /// PC += off.
JEQ_IMM	BPF opcode: jeq dst, imm, +off /// PC += off if dst == imm.
JEQ_REG	BPF opcode: jeq dst, src, +off /// PC += off if dst == src.
JGE_IMM	BPF opcode: jge dst, imm, +off /// PC += off if dst >= imm.
JGE_REG	BPF opcode: jge dst, src, +off /// PC += off if dst >= src.
JGT_IMM	BPF opcode: jgt dst, imm, +off /// PC += off if dst > imm.
JGT_REG	BPF opcode: jgt dst, src, +off /// PC += off if dst > src.
JLE_IMM	BPF opcode: jle dst, imm, +off /// PC += off if dst <= imm.
JLE_REG	BPF opcode: jle dst, src, +off /// PC += off if dst <= src.
JLT_IMM	BPF opcode: jlt dst, imm, +off /// PC += off if dst < imm.
JLT_REG	BPF opcode: jlt dst, src, +off /// PC += off if dst < src.
JNE_IMM	BPF opcode: jne dst, imm, +off /// PC += off if dst != imm.
JNE_REG	BPF opcode: jne dst, src, +off /// PC += off if dst != src.
JSET_IMM	BPF opcode: jset dst, imm, +off /// PC += off if dst & imm.
JSET_REG	BPF opcode: jset dst, src, +off /// PC += off if dst & src.
JSGE_IMM	BPF opcode: jsge dst, imm, +off /// PC += off if dst >= imm (signed).
JSGE_REG	BPF opcode: jsge dst, src, +off /// PC += off if dst >= src (signed).
JSGT_IMM	BPF opcode: jsgt dst, imm, +off /// PC += off if dst > imm (signed).
JSGT_REG	BPF opcode: jsgt dst, src, +off /// PC += off if dst > src (signed).
JSLE_IMM	BPF opcode: jsle dst, imm, +off /// PC += off if dst <= imm (signed).
JSLE_REG	BPF opcode: jsle dst, src, +off /// PC += off if dst <= src (signed).
JSLT_IMM	BPF opcode: jslt dst, imm, +off /// PC += off if dst < imm (signed).
JSLT_REG	BPF opcode: jslt dst, src, +off /// PC += off if dst < src (signed).
LD_ABS_B	BPF opcode: ldabsb src, dst, imm.
LD_ABS_DW	BPF opcode: ldabsdw src, dst, imm.
LD_ABS_H	BPF opcode: ldabsh src, dst, imm.
LD_ABS_W	BPF opcode: ldabsw src, dst, imm.
LD_B_REG	BPF opcode: ldxb dst, [src + off] /// dst = (src + off) as u8.
LD_DW_IMM	BPF opcode: lddw dst, imm /// dst = imm.
LD_DW_REG	BPF opcode: ldxdw dst, [src + off] /// dst = (src + off) as u64.
LD_H_REG	BPF opcode: ldxh dst, [src + off] /// dst = (src + off) as u16.
LD_IND_B	BPF opcode: ldindb src, dst, imm.
LD_IND_DW	BPF opcode: ldinddw src, dst, imm.
LD_IND_H	BPF opcode: ldindh src, dst, imm.
LD_IND_W	BPF opcode: ldindw src, dst, imm.
LD_W_REG	BPF opcode: ldxw dst, [src + off] /// dst = (src + off) as u32.
LE	BPF opcode: le dst /// dst = htole<imm>(dst), with imm in {16, 32, 64}.
LSH32_IMM	BPF opcode: lsh32 dst, imm /// dst <<= imm.
LSH32_REG	BPF opcode: lsh32 dst, src /// dst <<= src.
LSH64_IMM	BPF opcode: lsh64 dst, imm /// dst <<= imm.
LSH64_REG	BPF opcode: lsh64 dst, src /// dst <<= src.
MM_HEAP_START	Start of the heap in the memory map
MM_INPUT_START	Start of the input buffers in the memory map
MM_PROGRAM_START	Start of the program bits (text and ro segments) in the memory map
MM_STACK_START	Start of the stack in the memory map
MOD32_IMM	BPF opcode: mod32 dst, imm /// dst %= imm.
MOD32_REG	BPF opcode: mod32 dst, src /// dst %= src.
MOD64_IMM	BPF opcode: mod64 dst, imm /// dst %= imm.
MOD64_REG	BPF opcode: mod64 dst, src /// dst %= src.
MOV32_IMM	BPF opcode: mov32 dst, imm /// dst = imm.
MOV32_REG	BPF opcode: mov32 dst, src /// dst = src.
MOV64_IMM	BPF opcode: mov64 dst, imm /// dst = imm.
MOV64_REG	BPF opcode: mov64 dst, src /// dst = src.
MUL32_IMM	BPF opcode: mul32 dst, imm /// dst *= imm.
MUL32_REG	BPF opcode: mul32 dst, src /// dst *= src.
MUL64_IMM	BPF opcode: div64 dst, imm /// dst /= imm.
MUL64_REG	BPF opcode: div64 dst, src /// dst /= src.
NEG32	BPF opcode: neg32 dst /// dst = -dst.
NEG64	BPF opcode: neg64 dst, imm /// dst = -dst.
OR32_IMM	BPF opcode: or32 dst, imm /// dst |= imm.
OR32_REG	BPF opcode: or32 dst, src /// dst |= src.
OR64_IMM	BPF opcode: or64 dst, imm /// dst |= imm.
OR64_REG	BPF opcode: or64 dst, src /// dst |= src.
PROG_MAX_INSNS	Maximum number of instructions in an eBPF program.
PROG_MAX_SIZE	Maximum size of an eBPF program, in bytes.
RSH32_IMM	BPF opcode: rsh32 dst, imm /// dst >>= imm.
RSH32_REG	BPF opcode: rsh32 dst, src /// dst >>= src.
RSH64_IMM	BPF opcode: rsh64 dst, imm /// dst >>= imm.
RSH64_REG	BPF opcode: rsh64 dst, src /// dst >>= src.
SCRATCH_REGS	Number of scratch registers
STACK_REG	Stack register
ST_B_IMM	BPF opcode: stb [dst + off], imm /// (dst + offset) as u8 = imm.
ST_B_REG	BPF opcode: stxb [dst + off], src /// (dst + offset) as u8 = src.
ST_DW_IMM	BPF opcode: stdw [dst + off], imm /// (dst + offset) as u64 = imm.
ST_DW_REG	BPF opcode: stxdw [dst + off], src /// (dst + offset) as u64 = src.
ST_DW_XADD	BPF opcode: stxxadddw [dst + off], src.
ST_H_IMM	BPF opcode: sth [dst + off], imm /// (dst + offset) as u16 = imm.
ST_H_REG	BPF opcode: stxh [dst + off], src /// (dst + offset) as u16 = src.
ST_W_IMM	BPF opcode: stw [dst + off], imm /// (dst + offset) as u32 = imm.
ST_W_REG	BPF opcode: stxw [dst + off], src /// (dst + offset) as u32 = src.
ST_W_XADD	BPF opcode: stxxaddw [dst + off], src.
SUB32_IMM	BPF opcode: sub32 dst, imm /// dst -= imm.
SUB32_REG	BPF opcode: sub32 dst, src /// dst -= src.
SUB64_IMM	BPF opcode: sub64 dst, imm /// dst -= imm.
SUB64_REG	BPF opcode: sub64 dst, src /// dst -= src.
XOR32_IMM	BPF opcode: xor32 dst, imm /// dst ^= imm.
XOR32_REG	BPF opcode: xor32 dst, src /// dst ^= src.
XOR64_IMM	BPF opcode: xor64 dst, imm /// dst ^= imm.
XOR64_REG	BPF opcode: xor64 dst, src /// dst ^= src.

Functions

get_insn	Get the instruction at idx of an eBPF program. idx is the index (number) of the instruction (not a byte offset). The first instruction has index 0.
get_insn_unchecked	Same as get_insn except not checked
hash_symbol_name	Hash a symbol name
to_insn_vec	Return a vector of struct Insn built from a program.