// 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("MOV32SX, S8")
__success __success_unpriv __retval(0x23)
__naked void mov32sx_s8(void)
{
asm volatile (" \
w0 = 0xff23; \
w0 = (s8)w0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S16")
__success __success_unpriv __retval(0xFFFFff23)
__naked void mov32sx_s16(void)
{
asm volatile (" \
w0 = 0xff23; \
w0 = (s16)w0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("MOV64SX, S8")
__success __success_unpriv __retval(-2)
__naked void mov64sx_s8(void)
{
asm volatile (" \
r0 = 0x1fe; \
r0 = (s8)r0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("MOV64SX, S16")
__success __success_unpriv __retval(0xf23)
__naked void mov64sx_s16(void)
{
asm volatile (" \
r0 = 0xf0f23; \
r0 = (s16)r0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("MOV64SX, S32")
__success __success_unpriv __retval(-1)
__naked void mov64sx_s32(void)
{
asm volatile (" \
r0 = 0xfffffffe; \
r0 = (s32)r0; \
r0 >>= 1; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S8, range_check")
__success __success_unpriv __retval(1)
__naked void mov32sx_s8_range(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
w1 = (s8)w0; \
/* w1 with s8 range */ \
if w1 s> 0x7f goto l0_%=; \
if w1 s< -0x80 goto l0_%=; \
r0 = 1; \
l1_%=: \
exit; \
l0_%=: \
r0 = 2; \
goto l1_%=; \
" :
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S16, range_check")
__success __success_unpriv __retval(1)
__naked void mov32sx_s16_range(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
w1 = (s16)w0; \
/* w1 with s16 range */ \
if w1 s> 0x7fff goto l0_%=; \
if w1 s< -0x80ff goto l0_%=; \
r0 = 1; \
l1_%=: \
exit; \
l0_%=: \
r0 = 2; \
goto l1_%=; \
" :
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S16, range_check 2")
__success __success_unpriv __retval(1)
__naked void mov32sx_s16_range_2(void)
{
asm volatile (" \
r1 = 65535; \
w2 = (s16)w1; \
r2 >>= 1; \
if r2 != 0x7fffFFFF goto l0_%=; \
r0 = 1; \
l1_%=: \
exit; \
l0_%=: \
r0 = 0; \
goto l1_%=; \
" :
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("MOV64SX, S8, range_check")
__success __success_unpriv __retval(1)
__naked void mov64sx_s8_range(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
r1 = (s8)r0; \
/* 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("MOV64SX, S16, range_check")
__success __success_unpriv __retval(1)
__naked void mov64sx_s16_range(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
r1 = (s16)r0; \
/* 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("MOV64SX, S32, range_check")
__success __success_unpriv __retval(1)
__naked void mov64sx_s32_range(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
r1 = (s32)r0; \
/* r1 with s32 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);
}
SEC("socket")
__description("MOV64SX, S16, R10 Sign Extension")
__failure __msg("R1 type=scalar expected=fp, pkt, pkt_meta, map_key, map_value, mem, ringbuf_mem, buf, trusted_ptr_")
__failure_unpriv __msg_unpriv("R10 sign-extension part of pointer")
__naked void mov64sx_s16_r10(void)
{
asm volatile (" \
r1 = 553656332; \
*(u32 *)(r10 - 8) = r1; \
r1 = (s16)r10; \
r1 += -8; \
r2 = 3; \
if r2 <= r1 goto l0_%=; \
l0_%=: \
call %[bpf_trace_printk]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_trace_printk)
: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S8, var_off u32_max")
__failure __msg("infinite loop detected")
__failure_unpriv __msg_unpriv("back-edge from insn 2 to 0")
__naked void mov64sx_s32_varoff_1(void)
{
asm volatile (" \
l0_%=: \
r3 = *(u8 *)(r10 -387); \
w7 = (s8)w3; \
if w7 >= 0x2533823b goto l0_%=; \
w0 = 0; \
exit; \
" :
:
: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S8, var_off not u32_max, positive after s8 extension")
__success __retval(0)
__failure_unpriv __msg_unpriv("frame pointer is read only")
__naked void mov64sx_s32_varoff_2(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
r3 = r0; \
r3 &= 0xf; \
w7 = (s8)w3; \
if w7 s>= 16 goto l0_%=; \
w0 = 0; \
exit; \
l0_%=: \
r10 = 1; \
exit; \
" :
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
SEC("socket")
__description("MOV32SX, S8, var_off not u32_max, negative after s8 extension")
__success __retval(0)
__failure_unpriv __msg_unpriv("frame pointer is read only")
__naked void mov64sx_s32_varoff_3(void)
{
asm volatile (" \
call %[bpf_get_prandom_u32]; \
r3 = r0; \
r3 &= 0xf; \
r3 |= 0x80; \
w7 = (s8)w3; \
if w7 s>= -5 goto l0_%=; \
w0 = 0; \
exit; \
l0_%=: \
r10 = 1; \
exit; \
" :
: __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";
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