| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* Converted from tools/testing/selftests/bpf/verifier/d_path.c */ |
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| 3 | |
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| 4 | #include <linux/bpf.h> |
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| 5 | #include <bpf/bpf_helpers.h> |
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| 6 | #include "bpf_misc.h" |
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| 7 | |
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| 8 | SEC("fentry/dentry_open" ) |
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| 9 | __description("d_path accept" ) |
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| 10 | __success __retval(0) |
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| 11 | __naked void d_path_accept(void) |
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| 12 | { |
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| 13 | asm volatile (" \ |
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| 14 | r1 = *(u32*)(r1 + 0); \ |
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| 15 | r2 = r10; \ |
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| 16 | r2 += -8; \ |
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| 17 | r6 = 0; \ |
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| 18 | *(u64*)(r2 + 0) = r6; \ |
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| 19 | r3 = 8 ll; \ |
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| 20 | call %[bpf_d_path]; \ |
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| 21 | r0 = 0; \ |
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| 22 | exit; \ |
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| 23 | " : |
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| 24 | : __imm(bpf_d_path) |
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| 25 | : __clobber_all); |
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| 26 | } |
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| 27 | |
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| 28 | SEC("fentry/d_path" ) |
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| 29 | __description("d_path reject" ) |
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| 30 | __failure __msg("helper call is not allowed in probe" ) |
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| 31 | __naked void d_path_reject(void) |
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| 32 | { |
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| 33 | asm volatile (" \ |
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| 34 | r1 = *(u32*)(r1 + 0); \ |
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| 35 | r2 = r10; \ |
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| 36 | r2 += -8; \ |
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| 37 | r6 = 0; \ |
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| 38 | *(u64*)(r2 + 0) = r6; \ |
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| 39 | r3 = 8 ll; \ |
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| 40 | call %[bpf_d_path]; \ |
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| 41 | r0 = 0; \ |
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| 42 | exit; \ |
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| 43 | " : |
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| 44 | : __imm(bpf_d_path) |
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| 45 | : __clobber_all); |
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| 46 | } |
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| 47 | |
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| 48 | char _license[] SEC("license" ) = "GPL" ; |
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| 49 | |
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