159 lines
3.1 KiB
C
159 lines
3.1 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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#if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \
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(defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \
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defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \
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defined(__TARGET_ARCH_loongarch)) && \
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__clang_major__ >= 18
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SEC("socket")
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__description("LDSX, S8")
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__success __success_unpriv __retval(-2)
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__naked void ldsx_s8(void)
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{
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asm volatile (
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"r1 = 0x3fe;"
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"*(u64 *)(r10 - 8) = r1;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r0 = *(s8 *)(r10 - 8);"
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#else
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"r0 = *(s8 *)(r10 - 1);"
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#endif
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"exit;"
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::: __clobber_all);
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}
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SEC("socket")
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__description("LDSX, S16")
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__success __success_unpriv __retval(-2)
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__naked void ldsx_s16(void)
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{
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asm volatile (
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"r1 = 0x3fffe;"
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"*(u64 *)(r10 - 8) = r1;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r0 = *(s16 *)(r10 - 8);"
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#else
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"r0 = *(s16 *)(r10 - 2);"
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#endif
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"exit;"
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::: __clobber_all);
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}
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SEC("socket")
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__description("LDSX, S32")
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__success __success_unpriv __retval(-1)
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__naked void ldsx_s32(void)
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{
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asm volatile (
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"r1 = 0xfffffffe;"
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"*(u64 *)(r10 - 8) = r1;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r0 = *(s32 *)(r10 - 8);"
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#else
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"r0 = *(s32 *)(r10 - 4);"
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#endif
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"r0 >>= 1;"
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"exit;"
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::: __clobber_all);
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}
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SEC("socket")
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__description("LDSX, S8 range checking, privileged")
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__log_level(2) __success __retval(1)
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__msg("R1_w=scalar(smin=smin32=-128,smax=smax32=127)")
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__naked void ldsx_s8_range_priv(void)
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{
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asm volatile (
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"call %[bpf_get_prandom_u32];"
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"*(u64 *)(r10 - 8) = r0;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r1 = *(s8 *)(r10 - 8);"
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#else
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"r1 = *(s8 *)(r10 - 1);"
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#endif
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/* r1 with s8 range */
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"if r1 s> 0x7f goto l0_%=;"
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"if r1 s< -0x80 goto l0_%=;"
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"r0 = 1;"
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"l1_%=:"
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"exit;"
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"l0_%=:"
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"r0 = 2;"
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"goto l1_%=;"
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:
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("LDSX, S16 range checking")
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__success __success_unpriv __retval(1)
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__naked void ldsx_s16_range(void)
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{
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asm volatile (
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"call %[bpf_get_prandom_u32];"
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"*(u64 *)(r10 - 8) = r0;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r1 = *(s16 *)(r10 - 8);"
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#else
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"r1 = *(s16 *)(r10 - 2);"
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#endif
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/* r1 with s16 range */
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"if r1 s> 0x7fff goto l0_%=;"
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"if r1 s< -0x8000 goto l0_%=;"
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"r0 = 1;"
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"l1_%=:"
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"exit;"
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"l0_%=:"
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"r0 = 2;"
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"goto l1_%=;"
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:
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("LDSX, S32 range checking")
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__success __success_unpriv __retval(1)
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__naked void ldsx_s32_range(void)
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{
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asm volatile (
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"call %[bpf_get_prandom_u32];"
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"*(u64 *)(r10 - 8) = r0;"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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"r1 = *(s32 *)(r10 - 8);"
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#else
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"r1 = *(s32 *)(r10 - 4);"
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#endif
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/* r1 with s16 range */
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"if r1 s> 0x7fffFFFF goto l0_%=;"
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"if r1 s< -0x80000000 goto l0_%=;"
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"r0 = 1;"
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"l1_%=:"
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"exit;"
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"l0_%=:"
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"r0 = 2;"
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"goto l1_%=;"
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:
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: __imm(bpf_get_prandom_u32)
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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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