1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2023 SUSE LLC */ 3 #include <linux/bpf.h> 4 #include <bpf/bpf_helpers.h> 5 #include "bpf_misc.h" 6 7 SEC("?raw_tp") 8 __success __log_level(2) 9 __msg("mark_precise: frame0: regs=r2 stack= before 3: (bf) r1 = r10") 10 __msg("mark_precise: frame0: regs=r2 stack= before 2: (55) if r2 != 0xfffffff8 goto pc+2") 11 __msg("mark_precise: frame0: regs=r2 stack= before 1: (87) r2 = -r2") 12 __msg("mark_precise: frame0: regs=r2 stack= before 0: (b7) r2 = 8") 13 __naked int bpf_neg(void) 14 { 15 asm volatile ( 16 "r2 = 8;" 17 "r2 = -r2;" 18 "if r2 != -8 goto 1f;" 19 "r1 = r10;" 20 "r1 += r2;" 21 "1:" 22 "r0 = 0;" 23 "exit;" 24 ::: __clobber_all); 25 } 26 27 SEC("?raw_tp") 28 __success __log_level(2) 29 __msg("mark_precise: frame0: regs=r2 stack= before 3: (bf) r1 = r10") 30 __msg("mark_precise: frame0: regs=r2 stack= before 2: (55) if r2 != 0x0 goto pc+2") 31 __msg("mark_precise: frame0: regs=r2 stack= before 1: (d4) r2 = le16 r2") 32 __msg("mark_precise: frame0: regs=r2 stack= before 0: (b7) r2 = 0") 33 __naked int bpf_end_to_le(void) 34 { 35 asm volatile ( 36 "r2 = 0;" 37 "r2 = le16 r2;" 38 "if r2 != 0 goto 1f;" 39 "r1 = r10;" 40 "r1 += r2;" 41 "1:" 42 "r0 = 0;" 43 "exit;" 44 ::: __clobber_all); 45 } 46 47 48 SEC("?raw_tp") 49 __success __log_level(2) 50 __msg("mark_precise: frame0: regs=r2 stack= before 3: (bf) r1 = r10") 51 __msg("mark_precise: frame0: regs=r2 stack= before 2: (55) if r2 != 0x0 goto pc+2") 52 __msg("mark_precise: frame0: regs=r2 stack= before 1: (dc) r2 = be16 r2") 53 __msg("mark_precise: frame0: regs=r2 stack= before 0: (b7) r2 = 0") 54 __naked int bpf_end_to_be(void) 55 { 56 asm volatile ( 57 "r2 = 0;" 58 "r2 = be16 r2;" 59 "if r2 != 0 goto 1f;" 60 "r1 = r10;" 61 "r1 += r2;" 62 "1:" 63 "r0 = 0;" 64 "exit;" 65 ::: __clobber_all); 66 } 67 68 #if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \ 69 (defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \ 70 defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390)) && \ 71 __clang_major__ >= 18 72 73 SEC("?raw_tp") 74 __success __log_level(2) 75 __msg("mark_precise: frame0: regs=r2 stack= before 3: (bf) r1 = r10") 76 __msg("mark_precise: frame0: regs=r2 stack= before 2: (55) if r2 != 0x0 goto pc+2") 77 __msg("mark_precise: frame0: regs=r2 stack= before 1: (d7) r2 = bswap16 r2") 78 __msg("mark_precise: frame0: regs=r2 stack= before 0: (b7) r2 = 0") 79 __naked int bpf_end_bswap(void) 80 { 81 asm volatile ( 82 "r2 = 0;" 83 "r2 = bswap16 r2;" 84 "if r2 != 0 goto 1f;" 85 "r1 = r10;" 86 "r1 += r2;" 87 "1:" 88 "r0 = 0;" 89 "exit;" 90 ::: __clobber_all); 91 } 92 93 #endif /* v4 instruction */ 94