// 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)) && __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; \ r0 = *(s8 *)(r10 - 8); \ 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; \ r0 = *(s16 *)(r10 - 8); \ 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; \ r0 = *(s32 *)(r10 - 8); \ r0 >>= 1; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("LDSX, S8 range checking, privileged") __log_level(2) __success __retval(1) __msg("R1_w=scalar(smin=-128,smax=127)") __naked void ldsx_s8_range_priv(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ *(u64 *)(r10 - 8) = r0; \ r1 = *(s8 *)(r10 - 8); \ /* 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; \ r1 = *(s16 *)(r10 - 8); \ /* 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; \ r1 = *(s32 *)(r10 - 8); \ /* 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";