tools/testing/selftests/bpf/verifier/ld_abs.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/verifier/ld_abs.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/verifier/ld_abs.c- Extension
.c- Size
- 7013 bytes
- Lines
- 287
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
{
"ld_abs: check calling conv, r1",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_1, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
BPF_EXIT_INSN(),
},
.errstr = "R1 !read_ok",
.result = REJECT,
},
{
"ld_abs: check calling conv, r2",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_2, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
BPF_EXIT_INSN(),
},
.errstr = "R2 !read_ok",
.result = REJECT,
},
{
"ld_abs: check calling conv, r3",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_3, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_3),
BPF_EXIT_INSN(),
},
.errstr = "R3 !read_ok",
.result = REJECT,
},
{
"ld_abs: check calling conv, r4",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_4, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_4),
BPF_EXIT_INSN(),
},
.errstr = "R4 !read_ok",
.result = REJECT,
},
{
"ld_abs: check calling conv, r5",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_5, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.errstr = "R5 !read_ok",
.result = REJECT,
},
{
"ld_abs: check calling conv, r7",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_MOV64_IMM(BPF_REG_7, 0),
BPF_LD_ABS(BPF_W, -0x200000),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_7),
BPF_EXIT_INSN(),
},
.result = ACCEPT,
},
{
"ld_abs: tests on r6 and skb data reload helper",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_LD_ABS(BPF_B, 0),
BPF_LD_ABS(BPF_H, 0),
BPF_LD_ABS(BPF_W, 0),
BPF_MOV64_REG(BPF_REG_7, BPF_REG_6),
BPF_MOV64_IMM(BPF_REG_6, 0),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_3, 2),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_vlan_push),
BPF_MOV64_REG(BPF_REG_6, BPF_REG_7),
BPF_LD_ABS(BPF_B, 0),
BPF_LD_ABS(BPF_H, 0),
BPF_LD_ABS(BPF_W, 0),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_EXIT_INSN(),
Annotation
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.