82887c2568
Test verifier/unpriv semi-automatically converted to use inline assembly. The verifier/unpriv.c had to be split in two parts: - the bulk of the tests is in the progs/verifier_unpriv.c; - the single test that needs `struct bpf_perf_event_data` definition is in the progs/verifier_unpriv_perf.c. The tests above can't be in a single file because: - first requires inclusion of the filter.h header (to get access to BPF_ST_MEM macro, inline assembler does not support this isntruction); - the second requires vmlinux.h, which contains definitions conflicting with filter.h. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230421174234.2391278-23-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
34 lines
956 B
C
34 lines
956 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/unpriv.c */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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SEC("perf_event")
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__description("unpriv: spill/fill of different pointers ldx")
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__failure __msg("same insn cannot be used with different pointers")
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__naked void fill_of_different_pointers_ldx(void)
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{
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asm volatile (" \
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r6 = r10; \
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r6 += -8; \
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if r1 == 0 goto l0_%=; \
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r2 = r10; \
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r2 += %[__imm_0]; \
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*(u64*)(r6 + 0) = r2; \
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l0_%=: if r1 != 0 goto l1_%=; \
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*(u64*)(r6 + 0) = r1; \
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l1_%=: r1 = *(u64*)(r6 + 0); \
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r1 = *(u64*)(r1 + %[sample_period]); \
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r0 = 0; \
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exit; \
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" :
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: __imm_const(__imm_0,
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-(__s32) offsetof(struct bpf_perf_event_data, sample_period) - 8),
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__imm_const(sample_period,
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offsetof(struct bpf_perf_event_data, sample_period))
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: __clobber_all);
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}
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char _license[] SEC("license") = "GPL";
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