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2ea8f6a1cd
Cover instructions from each kind: - assignment - arithmetic - store/load - endian conversion - atomics - branches, conditional branches, may_goto, calls - LD_ABS/LD_IND - address_space_cast Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20250304195024.2478889-6-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
63 lines
1 KiB
C
63 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#ifdef CAN_USE_GOTOL
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SEC("socket")
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__description("gotol, small_imm")
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__success __success_unpriv __retval(1)
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__naked void gotol_small_imm(void)
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{
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asm volatile (" \
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call %[bpf_ktime_get_ns]; \
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if r0 == 0 goto l0_%=; \
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gotol l1_%=; \
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l2_%=: \
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gotol l3_%=; \
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l1_%=: \
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r0 = 1; \
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gotol l2_%=; \
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l0_%=: \
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r0 = 2; \
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l3_%=: \
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exit; \
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" :
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: __imm(bpf_ktime_get_ns)
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: __clobber_all);
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}
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SEC("socket")
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__description("gotol, large_imm")
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__success __failure_unpriv __retval(40000)
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__naked void gotol_large_imm(void)
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{
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asm volatile (" \
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gotol 1f; \
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0: \
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r0 = 0; \
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.rept 40000; \
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r0 += 1; \
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.endr; \
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exit; \
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1: gotol 0b; \
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" :
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:
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: __clobber_all);
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}
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#else
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SEC("socket")
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__description("cpuv4 is not supported by compiler or jit, use a dummy test")
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__success
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int dummy_test(void)
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{
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return 0;
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}
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#endif
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char _license[] SEC("license") = "GPL";
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