49 lines
975 B
C
49 lines
975 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Converted from tools/testing/selftests/bpf/verifier/d_path.c */
|
|
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include "bpf_misc.h"
|
|
|
|
SEC("fentry/dentry_open")
|
|
__description("d_path accept")
|
|
__success __retval(0)
|
|
__naked void d_path_accept(void)
|
|
{
|
|
asm volatile (" \
|
|
r1 = *(u32*)(r1 + 0); \
|
|
r2 = r10; \
|
|
r2 += -8; \
|
|
r6 = 0; \
|
|
*(u64*)(r2 + 0) = r6; \
|
|
r3 = 8 ll; \
|
|
call %[bpf_d_path]; \
|
|
r0 = 0; \
|
|
exit; \
|
|
" :
|
|
: __imm(bpf_d_path)
|
|
: __clobber_all);
|
|
}
|
|
|
|
SEC("fentry/d_path")
|
|
__description("d_path reject")
|
|
__failure __msg("helper call is not allowed in probe")
|
|
__naked void d_path_reject(void)
|
|
{
|
|
asm volatile (" \
|
|
r1 = *(u32*)(r1 + 0); \
|
|
r2 = r10; \
|
|
r2 += -8; \
|
|
r6 = 0; \
|
|
*(u64*)(r2 + 0) = r6; \
|
|
r3 = 8 ll; \
|
|
call %[bpf_d_path]; \
|
|
r0 = 0; \
|
|
exit; \
|
|
" :
|
|
: __imm(bpf_d_path)
|
|
: __clobber_all);
|
|
}
|
|
|
|
char _license[] SEC("license") = "GPL";
|