tools/testing/selftests/bpf/verifier/jit.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/verifier/jit.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/verifier/jit.c
Extension
.c
Size
6177 bytes
Lines
219
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

{
	"jit: lsh, rsh, arsh by 1",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_MOV64_IMM(BPF_REG_1, 0xff),
	BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 1),
	BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 1),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x3fc, 1),
	BPF_EXIT_INSN(),
	BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 1),
	BPF_ALU32_IMM(BPF_RSH, BPF_REG_1, 1),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0xff, 1),
	BPF_EXIT_INSN(),
	BPF_ALU64_IMM(BPF_ARSH, BPF_REG_1, 1),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x7f, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_IMM(BPF_REG_0, 2),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.retval = 2,
},
{
	"jit: lsh, rsh, arsh by reg",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_MOV64_IMM(BPF_REG_4, 1),
	BPF_MOV64_IMM(BPF_REG_1, 0xff),
	BPF_ALU64_REG(BPF_LSH, BPF_REG_1, BPF_REG_0),
	BPF_ALU32_REG(BPF_LSH, BPF_REG_1, BPF_REG_4),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x3fc, 1),
	BPF_EXIT_INSN(),
	BPF_ALU64_REG(BPF_RSH, BPF_REG_1, BPF_REG_4),
	BPF_MOV64_REG(BPF_REG_4, BPF_REG_1),
	BPF_ALU32_REG(BPF_RSH, BPF_REG_4, BPF_REG_0),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_4, 0xff, 1),
	BPF_EXIT_INSN(),
	BPF_ALU64_REG(BPF_ARSH, BPF_REG_4, BPF_REG_4),
	BPF_JMP_IMM(BPF_JEQ, BPF_REG_4, 0, 1),
	BPF_EXIT_INSN(),
	BPF_MOV64_IMM(BPF_REG_0, 2),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.retval = 2,
},
{
	"jit: mov32 for ldimm64, 1",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_0, 2),
	BPF_LD_IMM64(BPF_REG_1, 0xfeffffffffffffffULL),
	BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 32),
	BPF_LD_IMM64(BPF_REG_2, 0xfeffffffULL),
	BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.retval = 2,
},
{
	"jit: mov32 for ldimm64, 2",
	.insns = {
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_LD_IMM64(BPF_REG_1, 0x1ffffffffULL),
	BPF_LD_IMM64(BPF_REG_2, 0xffffffffULL),
	BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_2, 1),
	BPF_MOV64_IMM(BPF_REG_0, 2),
	BPF_EXIT_INSN(),
	},
	.result = ACCEPT,
	.retval = 2,
},
{
	"jit: various mul tests",
	.insns = {
	BPF_LD_IMM64(BPF_REG_2, 0xeeff0d413122ULL),
	BPF_LD_IMM64(BPF_REG_0, 0xfefefeULL),
	BPF_LD_IMM64(BPF_REG_1, 0xefefefULL),
	BPF_ALU64_REG(BPF_MUL, BPF_REG_0, BPF_REG_1),
	BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_2, 2),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	BPF_LD_IMM64(BPF_REG_3, 0xfefefeULL),
	BPF_ALU64_REG(BPF_MUL, BPF_REG_3, BPF_REG_1),
	BPF_JMP_REG(BPF_JEQ, BPF_REG_3, BPF_REG_2, 2),
	BPF_MOV64_IMM(BPF_REG_0, 1),
	BPF_EXIT_INSN(),
	BPF_LD_IMM64(BPF_REG_3, 0xfefefeULL),
	BPF_ALU64_IMM(BPF_MUL, BPF_REG_3, 0xefefef),

Annotation

Implementation Notes