blob: d4427d8e12174b35940b1a6e936d7184600bdcdc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
#if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \
(defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \
defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \
defined(__TARGET_ARCH_loongarch)) && \
__clang_major__ >= 18
SEC("socket")
__description("LDSX, S8")
__success __success_unpriv __retval(-2)
__naked void ldsx_s8(void)
{
asm volatile (
"r1 = 0x3fe;"
"*(u64 *)(r10 - 8) = r1;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r0 = *(s8 *)(r10 - 8);"
#else
"r0 = *(s8 *)(r10 - 1);"
#endif
"exit;"
::: __clobber_all);
}
SEC("socket")
__description("LDSX, S16")
__success __success_unpriv __retval(-2)
__naked void ldsx_s16(void)
{
asm volatile (
"r1 = 0x3fffe;"
"*(u64 *)(r10 - 8) = r1;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r0 = *(s16 *)(r10 - 8);"
#else
"r0 = *(s16 *)(r10 - 2);"
#endif
"exit;"
::: __clobber_all);
}
SEC("socket")
__description("LDSX, S32")
__success __success_unpriv __retval(-1)
__naked void ldsx_s32(void)
{
asm volatile (
"r1 = 0xfffffffe;"
"*(u64 *)(r10 - 8) = r1;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r0 = *(s32 *)(r10 - 8);"
#else
"r0 = *(s32 *)(r10 - 4);"
#endif
"r0 >>= 1;"
"exit;"
::: __clobber_all);
}
SEC("socket")
__description("LDSX, S8 range checking, privileged")
__log_level(2) __success __retval(1)
__msg("R1_w=scalar(smin=smin32=-128,smax=smax32=127)")
__naked void ldsx_s8_range_priv(void)
{
asm volatile (
"call %[bpf_get_prandom_u32];"
"*(u64 *)(r10 - 8) = r0;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r1 = *(s8 *)(r10 - 8);"
#else
"r1 = *(s8 *)(r10 - 1);"
#endif
/* r1 with s8 range */
"if r1 s> 0x7f goto l0_%=;"
"if r1 s< -0x80 goto l0_%=;"
"r0 = 1;"
"l1_%=:"
"exit;"
"l0_%=:"
"r0 = 2;"
"goto l1_%=;"
:
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("LDSX, S16 range checking")
__success __success_unpriv __retval(1)
__naked void ldsx_s16_range(void)
{
asm volatile (
"call %[bpf_get_prandom_u32];"
"*(u64 *)(r10 - 8) = r0;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r1 = *(s16 *)(r10 - 8);"
#else
"r1 = *(s16 *)(r10 - 2);"
#endif
/* r1 with s16 range */
"if r1 s> 0x7fff goto l0_%=;"
"if r1 s< -0x8000 goto l0_%=;"
"r0 = 1;"
"l1_%=:"
"exit;"
"l0_%=:"
"r0 = 2;"
"goto l1_%=;"
:
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("LDSX, S32 range checking")
__success __success_unpriv __retval(1)
__naked void ldsx_s32_range(void)
{
asm volatile (
"call %[bpf_get_prandom_u32];"
"*(u64 *)(r10 - 8) = r0;"
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
"r1 = *(s32 *)(r10 - 8);"
#else
"r1 = *(s32 *)(r10 - 4);"
#endif
/* r1 with s16 range */
"if r1 s> 0x7fffFFFF goto l0_%=;"
"if r1 s< -0x80000000 goto l0_%=;"
"r0 = 1;"
"l1_%=:"
"exit;"
"l0_%=:"
"r0 = 2;"
"goto l1_%=;"
:
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
#else
SEC("socket")
__description("cpuv4 is not supported by compiler or jit, use a dummy test")
__success
int dummy_test(void)
{
return 0;
}
#endif
char _license[] SEC("license") = "GPL";
|
