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 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
 #ifndef __BPF_TRACING_H__
 #define __BPF_TRACING_H__
 
 #include <bpf/bpf_helpers.h>
 
 /* Scan the ARCH passed in from ARCH env variable (see Makefile) */
 #if defined(__TARGET_ARCH_x86)
     #define bpf_target_x86
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_s390)
     #define bpf_target_s390
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_arm)
     #define bpf_target_arm
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_arm64)
     #define bpf_target_arm64
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_mips)
     #define bpf_target_mips
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_powerpc)
     #define bpf_target_powerpc
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_sparc)
     #define bpf_target_sparc
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_riscv)
     #define bpf_target_riscv
     #define bpf_target_defined
 #elif defined(__TARGET_ARCH_arc)
     #define bpf_target_arc
     #define bpf_target_defined
 #else
 
 /* Fall back to what the compiler says */
 #if defined(__x86_64__)
     #define bpf_target_x86
     #define bpf_target_defined
 #elif defined(__s390__)
     #define bpf_target_s390
     #define bpf_target_defined
 #elif defined(__arm__)
     #define bpf_target_arm
     #define bpf_target_defined
 #elif defined(__aarch64__)
     #define bpf_target_arm64
     #define bpf_target_defined
 #elif defined(__mips__)
     #define bpf_target_mips
     #define bpf_target_defined
 #elif defined(__powerpc__)
     #define bpf_target_powerpc
     #define bpf_target_defined
 #elif defined(__sparc__)
     #define bpf_target_sparc
     #define bpf_target_defined
 #elif defined(__riscv) && __riscv_xlen == 64
     #define bpf_target_riscv
     #define bpf_target_defined
 #elif defined(__arc__)
     #define bpf_target_arc
     #define bpf_target_defined
 #endif /* no compiler target */
 
 #endif
 
 #ifndef __BPF_TARGET_MISSING
 #define __BPF_TARGET_MISSING "GCC error \"Must specify a BPF target arch via __TARGET_ARCH_xxx\""
 #endif
 
 #if defined(bpf_target_x86)
 
 #if defined(__KERNEL__) || defined(__VMLINUX_H__)
 
 #define __PT_PARM1_REG di
 #define __PT_PARM2_REG si
 #define __PT_PARM3_REG dx
 #define __PT_PARM4_REG cx
 #define __PT_PARM5_REG r8
 #define __PT_RET_REG sp
 #define __PT_FP_REG bp
 #define __PT_RC_REG ax
 #define __PT_SP_REG sp
 #define __PT_IP_REG ip
 /* syscall uses r10 for PARM4 */
 #define PT_REGS_PARM4_SYSCALL(x) ((x)->r10)
 #define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10)
 
 #else
 
 #ifdef __i386__
 
 #define __PT_PARM1_REG eax
 #define __PT_PARM2_REG edx
 #define __PT_PARM3_REG ecx
 /* i386 kernel is built with -mregparm=3 */
 #define __PT_PARM4_REG __unsupported__
 #define __PT_PARM5_REG __unsupported__
 #define __PT_RET_REG esp
 #define __PT_FP_REG ebp
 #define __PT_RC_REG eax
 #define __PT_SP_REG esp
 #define __PT_IP_REG eip
 
 #else /* __i386__ */
 
 #define __PT_PARM1_REG rdi
 #define __PT_PARM2_REG rsi
 #define __PT_PARM3_REG rdx
 #define __PT_PARM4_REG rcx
 #define __PT_PARM5_REG r8
 #define __PT_RET_REG rsp
 #define __PT_FP_REG rbp
 #define __PT_RC_REG rax
 #define __PT_SP_REG rsp
 #define __PT_IP_REG rip
 /* syscall uses r10 for PARM4 */
 #define PT_REGS_PARM4_SYSCALL(x) ((x)->r10)
 #define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(x, r10)
 
 #endif /* __i386__ */
 
 #endif /* __KERNEL__ || __VMLINUX_H__ */
 
 #elif defined(bpf_target_s390)
 
 struct pt_regs___s390 {
     unsigned long orig_gpr2;
 };
 
 /* s390 provides user_pt_regs instead of struct pt_regs to userspace */
 #define __PT_REGS_CAST(x) ((const user_pt_regs *)(x))
 #define __PT_PARM1_REG gprs[2]
 #define __PT_PARM2_REG gprs[3]
 #define __PT_PARM3_REG gprs[4]
 #define __PT_PARM4_REG gprs[5]
 #define __PT_PARM5_REG gprs[6]
 #define __PT_RET_REG grps[14]
 #define __PT_FP_REG gprs[11]    /* Works only with CONFIG_FRAME_POINTER */
 #define __PT_RC_REG gprs[2]
 #define __PT_SP_REG gprs[15]
 #define __PT_IP_REG psw.addr
 #define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x)
 #define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___s390 *)(x), orig_gpr2)
 
 #elif defined(bpf_target_arm)
 
 #define __PT_PARM1_REG uregs[0]
 #define __PT_PARM2_REG uregs[1]
 #define __PT_PARM3_REG uregs[2]
 #define __PT_PARM4_REG uregs[3]
 #define __PT_PARM5_REG uregs[4]
 #define __PT_RET_REG uregs[14]
 #define __PT_FP_REG uregs[11]   /* Works only with CONFIG_FRAME_POINTER */
 #define __PT_RC_REG uregs[0]
 #define __PT_SP_REG uregs[13]
 #define __PT_IP_REG uregs[12]
 
 #elif defined(bpf_target_arm64)
 
 struct pt_regs___arm64 {
     unsigned long orig_x0;
 };
 
 /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */
 #define __PT_REGS_CAST(x) ((const struct user_pt_regs *)(x))
 #define __PT_PARM1_REG regs[0]
 #define __PT_PARM2_REG regs[1]
 #define __PT_PARM3_REG regs[2]
 #define __PT_PARM4_REG regs[3]
 #define __PT_PARM5_REG regs[4]
 #define __PT_RET_REG regs[30]
 #define __PT_FP_REG regs[29]    /* Works only with CONFIG_FRAME_POINTER */
 #define __PT_RC_REG regs[0]
 #define __PT_SP_REG sp
 #define __PT_IP_REG pc
 #define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1_CORE_SYSCALL(x)
 #define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ((const struct pt_regs___arm64 *)(x), orig_x0)
 
 #elif defined(bpf_target_mips)
 
 #define __PT_PARM1_REG regs[4]
 #define __PT_PARM2_REG regs[5]
 #define __PT_PARM3_REG regs[6]
 #define __PT_PARM4_REG regs[7]
 #define __PT_PARM5_REG regs[8]
 #define __PT_RET_REG regs[31]
 #define __PT_FP_REG regs[30]    /* Works only with CONFIG_FRAME_POINTER */
 #define __PT_RC_REG regs[2]
 #define __PT_SP_REG regs[29]
 #define __PT_IP_REG cp0_epc
 
 #elif defined(bpf_target_powerpc)
 
 #define __PT_PARM1_REG gpr[3]
 #define __PT_PARM2_REG gpr[4]
 #define __PT_PARM3_REG gpr[5]
 #define __PT_PARM4_REG gpr[6]
 #define __PT_PARM5_REG gpr[7]
 #define __PT_RET_REG regs[31]
 #define __PT_FP_REG __unsupported__
 #define __PT_RC_REG gpr[3]
 #define __PT_SP_REG sp
 #define __PT_IP_REG nip
 /* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER. */
 #define PT_REGS_SYSCALL_REGS(ctx) ctx
 
 #elif defined(bpf_target_sparc)
 
 #define __PT_PARM1_REG u_regs[UREG_I0]
 #define __PT_PARM2_REG u_regs[UREG_I1]
 #define __PT_PARM3_REG u_regs[UREG_I2]
 #define __PT_PARM4_REG u_regs[UREG_I3]
 #define __PT_PARM5_REG u_regs[UREG_I4]
 #define __PT_RET_REG u_regs[UREG_I7]
 #define __PT_FP_REG __unsupported__
 #define __PT_RC_REG u_regs[UREG_I0]
 #define __PT_SP_REG u_regs[UREG_FP]
 /* Should this also be a bpf_target check for the sparc case? */
 #if defined(__arch64__)
 #define __PT_IP_REG tpc
 #else
 #define __PT_IP_REG pc
 #endif
 
 #elif defined(bpf_target_riscv)
 
 #define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x))
 #define __PT_PARM1_REG a0
 #define __PT_PARM2_REG a1
 #define __PT_PARM3_REG a2
 #define __PT_PARM4_REG a3
 #define __PT_PARM5_REG a4
 #define __PT_RET_REG ra
 #define __PT_FP_REG s0
 #define __PT_RC_REG a0
 #define __PT_SP_REG sp
 #define __PT_IP_REG pc
 /* riscv does not select ARCH_HAS_SYSCALL_WRAPPER. */
 #define PT_REGS_SYSCALL_REGS(ctx) ctx
 
 #elif defined(bpf_target_arc)
 
 /* arc provides struct user_pt_regs instead of struct pt_regs to userspace */
 #define __PT_REGS_CAST(x) ((const struct user_regs_struct *)(x))
 #define __PT_PARM1_REG scratch.r0
 #define __PT_PARM2_REG scratch.r1
 #define __PT_PARM3_REG scratch.r2
 #define __PT_PARM4_REG scratch.r3
 #define __PT_PARM5_REG scratch.r4
 #define __PT_RET_REG scratch.blink
 #define __PT_FP_REG __unsupported__
 #define __PT_RC_REG scratch.r0
 #define __PT_SP_REG scratch.sp
 #define __PT_IP_REG scratch.ret
 /* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */
 #define PT_REGS_SYSCALL_REGS(ctx) ctx
 
 #endif
 
 #if defined(bpf_target_defined)
 
 struct pt_regs;
 
 /* allow some architecutres to override `struct pt_regs` */
 #ifndef __PT_REGS_CAST
 #define __PT_REGS_CAST(x) (x)
 #endif
 
 #define PT_REGS_PARM1(x) (__PT_REGS_CAST(x)->__PT_PARM1_REG)
 #define PT_REGS_PARM2(x) (__PT_REGS_CAST(x)->__PT_PARM2_REG)
 #define PT_REGS_PARM3(x) (__PT_REGS_CAST(x)->__PT_PARM3_REG)
 #define PT_REGS_PARM4(x) (__PT_REGS_CAST(x)->__PT_PARM4_REG)
 #define PT_REGS_PARM5(x) (__PT_REGS_CAST(x)->__PT_PARM5_REG)
 #define PT_REGS_RET(x) (__PT_REGS_CAST(x)->__PT_RET_REG)
 #define PT_REGS_FP(x) (__PT_REGS_CAST(x)->__PT_FP_REG)
 #define PT_REGS_RC(x) (__PT_REGS_CAST(x)->__PT_RC_REG)
 #define PT_REGS_SP(x) (__PT_REGS_CAST(x)->__PT_SP_REG)
 #define PT_REGS_IP(x) (__PT_REGS_CAST(x)->__PT_IP_REG)
 
 #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM1_REG)
 #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM2_REG)
 #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM3_REG)
 #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM4_REG)
 #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM5_REG)
 #define PT_REGS_RET_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RET_REG)
 #define PT_REGS_FP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_FP_REG)
 #define PT_REGS_RC_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_RC_REG)
 #define PT_REGS_SP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_SP_REG)
 #define PT_REGS_IP_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_IP_REG)
 
 #if defined(bpf_target_powerpc)
 
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)     ({ (ip) = (ctx)->link; })
 #define BPF_KRETPROBE_READ_RET_IP       BPF_KPROBE_READ_RET_IP
 
 #elif defined(bpf_target_sparc)
 
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)     ({ (ip) = PT_REGS_RET(ctx); })
 #define BPF_KRETPROBE_READ_RET_IP       BPF_KPROBE_READ_RET_IP
 
 #else
 
 #define BPF_KPROBE_READ_RET_IP(ip, ctx)                     \
     ({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
 #define BPF_KRETPROBE_READ_RET_IP(ip, ctx)                  \
     ({ bpf_probe_read_kernel(&(ip), sizeof(ip), (void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
 
 #endif
 
 #ifndef PT_REGS_PARM1_SYSCALL
 #define PT_REGS_PARM1_SYSCALL(x) PT_REGS_PARM1(x)
 #endif
 #define PT_REGS_PARM2_SYSCALL(x) PT_REGS_PARM2(x)
 #define PT_REGS_PARM3_SYSCALL(x) PT_REGS_PARM3(x)
 #ifndef PT_REGS_PARM4_SYSCALL
 #define PT_REGS_PARM4_SYSCALL(x) PT_REGS_PARM4(x)
 #endif
 #define PT_REGS_PARM5_SYSCALL(x) PT_REGS_PARM5(x)
 
 #ifndef PT_REGS_PARM1_CORE_SYSCALL
 #define PT_REGS_PARM1_CORE_SYSCALL(x) PT_REGS_PARM1_CORE(x)
 #endif
 #define PT_REGS_PARM2_CORE_SYSCALL(x) PT_REGS_PARM2_CORE(x)
 #define PT_REGS_PARM3_CORE_SYSCALL(x) PT_REGS_PARM3_CORE(x)
 #ifndef PT_REGS_PARM4_CORE_SYSCALL
 #define PT_REGS_PARM4_CORE_SYSCALL(x) PT_REGS_PARM4_CORE(x)
 #endif
 #define PT_REGS_PARM5_CORE_SYSCALL(x) PT_REGS_PARM5_CORE(x)
 
 #else /* defined(bpf_target_defined) */
 
 #define PT_REGS_PARM1(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM2(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM3(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM4(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM5(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_RET(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_FP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_RC(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_SP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_IP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 
 #define PT_REGS_PARM1_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM2_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM3_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM4_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM5_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_RET_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_FP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_RC_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_SP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_IP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 
 #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 
 #define PT_REGS_PARM1_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM2_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM3_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM4_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM5_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 
 #define PT_REGS_PARM1_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM2_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM3_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM4_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 #define PT_REGS_PARM5_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0l; })
 
 #endif /* defined(bpf_target_defined) */
 
 /*
  * When invoked from a syscall handler kprobe, returns a pointer to a
  * struct pt_regs containing syscall arguments and suitable for passing to
  * PT_REGS_PARMn_SYSCALL() and PT_REGS_PARMn_CORE_SYSCALL().
  */
 #ifndef PT_REGS_SYSCALL_REGS
 /* By default, assume that the arch selects ARCH_HAS_SYSCALL_WRAPPER. */
 #define PT_REGS_SYSCALL_REGS(ctx) ((struct pt_regs *)PT_REGS_PARM1(ctx))
 #endif
 
 #ifndef ___bpf_concat
 #define ___bpf_concat(a, b) a ## b
 #endif
 #ifndef ___bpf_apply
 #define ___bpf_apply(fn, n) ___bpf_concat(fn, n)
 #endif
 #ifndef ___bpf_nth
 #define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N
 #endif
 #ifndef ___bpf_narg
 #define ___bpf_narg(...) ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
 #endif
 
 #define ___bpf_ctx_cast0()            ctx
 #define ___bpf_ctx_cast1(x)           ___bpf_ctx_cast0(), (void *)ctx[0]
 #define ___bpf_ctx_cast2(x, args...)  ___bpf_ctx_cast1(args), (void *)ctx[1]
 #define ___bpf_ctx_cast3(x, args...)  ___bpf_ctx_cast2(args), (void *)ctx[2]
 #define ___bpf_ctx_cast4(x, args...)  ___bpf_ctx_cast3(args), (void *)ctx[3]
 #define ___bpf_ctx_cast5(x, args...)  ___bpf_ctx_cast4(args), (void *)ctx[4]
 #define ___bpf_ctx_cast6(x, args...)  ___bpf_ctx_cast5(args), (void *)ctx[5]
 #define ___bpf_ctx_cast7(x, args...)  ___bpf_ctx_cast6(args), (void *)ctx[6]
 #define ___bpf_ctx_cast8(x, args...)  ___bpf_ctx_cast7(args), (void *)ctx[7]
 #define ___bpf_ctx_cast9(x, args...)  ___bpf_ctx_cast8(args), (void *)ctx[8]
 #define ___bpf_ctx_cast10(x, args...) ___bpf_ctx_cast9(args), (void *)ctx[9]
 #define ___bpf_ctx_cast11(x, args...) ___bpf_ctx_cast10(args), (void *)ctx[10]
 #define ___bpf_ctx_cast12(x, args...) ___bpf_ctx_cast11(args), (void *)ctx[11]
 #define ___bpf_ctx_cast(args...)      ___bpf_apply(___bpf_ctx_cast, ___bpf_narg(args))(args)
 
 /*
  * BPF_PROG is a convenience wrapper for generic tp_btf/fentry/fexit and
  * similar kinds of BPF programs, that accept input arguments as a single
  * pointer to untyped u64 array, where each u64 can actually be a typed
  * pointer or integer of different size. Instead of requring user to write
  * manual casts and work with array elements by index, BPF_PROG macro
  * allows user to declare a list of named and typed input arguments in the
  * same syntax as for normal C function. All the casting is hidden and
  * performed transparently, while user code can just assume working with
  * function arguments of specified type and name.
  *
  * Original raw context argument is preserved as well as 'ctx' argument.
  * This is useful when using BPF helpers that expect original context
  * as one of the parameters (e.g., for bpf_perf_event_output()).
  */
 #define BPF_PROG(name, args...)                         \
 name(unsigned long long *ctx);                          \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(unsigned long long *ctx, ##args);                    \
 typeof(name(0)) name(unsigned long long *ctx)                   \
 {                                       \
     _Pragma("GCC diagnostic push")                      \
     _Pragma("GCC diagnostic ignored \"-Wint-conversion\"")          \
     return ____##name(___bpf_ctx_cast(args));               \
     _Pragma("GCC diagnostic pop")                       \
 }                                       \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(unsigned long long *ctx, ##args)
 
 struct pt_regs;
 
 #define ___bpf_kprobe_args0()           ctx
 #define ___bpf_kprobe_args1(x)          ___bpf_kprobe_args0(), (void *)PT_REGS_PARM1(ctx)
 #define ___bpf_kprobe_args2(x, args...) ___bpf_kprobe_args1(args), (void *)PT_REGS_PARM2(ctx)
 #define ___bpf_kprobe_args3(x, args...) ___bpf_kprobe_args2(args), (void *)PT_REGS_PARM3(ctx)
 #define ___bpf_kprobe_args4(x, args...) ___bpf_kprobe_args3(args), (void *)PT_REGS_PARM4(ctx)
 #define ___bpf_kprobe_args5(x, args...) ___bpf_kprobe_args4(args), (void *)PT_REGS_PARM5(ctx)
 #define ___bpf_kprobe_args(args...)     ___bpf_apply(___bpf_kprobe_args, ___bpf_narg(args))(args)
 
 /*
  * BPF_KPROBE serves the same purpose for kprobes as BPF_PROG for
  * tp_btf/fentry/fexit BPF programs. It hides the underlying platform-specific
  * low-level way of getting kprobe input arguments from struct pt_regs, and
  * provides a familiar typed and named function arguments syntax and
  * semantics of accessing kprobe input paremeters.
  *
  * Original struct pt_regs* context is preserved as 'ctx' argument. This might
  * be necessary when using BPF helpers like bpf_perf_event_output().
  */
 #define BPF_KPROBE(name, args...)                       \
 name(struct pt_regs *ctx);                          \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(struct pt_regs *ctx, ##args);                    \
 typeof(name(0)) name(struct pt_regs *ctx)                   \
 {                                       \
     _Pragma("GCC diagnostic push")                      \
     _Pragma("GCC diagnostic ignored \"-Wint-conversion\"")          \
     return ____##name(___bpf_kprobe_args(args));                \
     _Pragma("GCC diagnostic pop")                       \
 }                                       \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(struct pt_regs *ctx, ##args)
 
 #define ___bpf_kretprobe_args0()       ctx
 #define ___bpf_kretprobe_args1(x)      ___bpf_kretprobe_args0(), (void *)PT_REGS_RC(ctx)
 #define ___bpf_kretprobe_args(args...) ___bpf_apply(___bpf_kretprobe_args, ___bpf_narg(args))(args)
 
 /*
  * BPF_KRETPROBE is similar to BPF_KPROBE, except, it only provides optional
  * return value (in addition to `struct pt_regs *ctx`), but no input
  * arguments, because they will be clobbered by the time probed function
  * returns.
  */
 #define BPF_KRETPROBE(name, args...)                        \
 name(struct pt_regs *ctx);                          \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(struct pt_regs *ctx, ##args);                    \
 typeof(name(0)) name(struct pt_regs *ctx)                   \
 {                                       \
     _Pragma("GCC diagnostic push")                      \
     _Pragma("GCC diagnostic ignored \"-Wint-conversion\"")          \
     return ____##name(___bpf_kretprobe_args(args));             \
     _Pragma("GCC diagnostic pop")                       \
 }                                       \
 static __always_inline typeof(name(0)) ____##name(struct pt_regs *ctx, ##args)
 
 /* If kernel has CONFIG_ARCH_HAS_SYSCALL_WRAPPER, read pt_regs directly */
 #define ___bpf_syscall_args0()           ctx
 #define ___bpf_syscall_args1(x)          ___bpf_syscall_args0(), (void *)PT_REGS_PARM1_SYSCALL(regs)
 #define ___bpf_syscall_args2(x, args...) ___bpf_syscall_args1(args), (void *)PT_REGS_PARM2_SYSCALL(regs)
 #define ___bpf_syscall_args3(x, args...) ___bpf_syscall_args2(args), (void *)PT_REGS_PARM3_SYSCALL(regs)
 #define ___bpf_syscall_args4(x, args...) ___bpf_syscall_args3(args), (void *)PT_REGS_PARM4_SYSCALL(regs)
 #define ___bpf_syscall_args5(x, args...) ___bpf_syscall_args4(args), (void *)PT_REGS_PARM5_SYSCALL(regs)
 #define ___bpf_syscall_args(args...)     ___bpf_apply(___bpf_syscall_args, ___bpf_narg(args))(args)
 
 /* If kernel doesn't have CONFIG_ARCH_HAS_SYSCALL_WRAPPER, we have to BPF_CORE_READ from pt_regs */
 #define ___bpf_syswrap_args0()           ctx
 #define ___bpf_syswrap_args1(x)          ___bpf_syswrap_args0(), (void *)PT_REGS_PARM1_CORE_SYSCALL(regs)
 #define ___bpf_syswrap_args2(x, args...) ___bpf_syswrap_args1(args), (void *)PT_REGS_PARM2_CORE_SYSCALL(regs)
 #define ___bpf_syswrap_args3(x, args...) ___bpf_syswrap_args2(args), (void *)PT_REGS_PARM3_CORE_SYSCALL(regs)
 #define ___bpf_syswrap_args4(x, args...) ___bpf_syswrap_args3(args), (void *)PT_REGS_PARM4_CORE_SYSCALL(regs)
 #define ___bpf_syswrap_args5(x, args...) ___bpf_syswrap_args4(args), (void *)PT_REGS_PARM5_CORE_SYSCALL(regs)
 #define ___bpf_syswrap_args(args...)     ___bpf_apply(___bpf_syswrap_args, ___bpf_narg(args))(args)
 
 /*
  * BPF_KSYSCALL is a variant of BPF_KPROBE, which is intended for
  * tracing syscall functions, like __x64_sys_close. It hides the underlying
  * platform-specific low-level way of getting syscall input arguments from
  * struct pt_regs, and provides a familiar typed and named function arguments
  * syntax and semantics of accessing syscall input parameters.
  *
  * Original struct pt_regs * context is preserved as 'ctx' argument. This might
  * be necessary when using BPF helpers like bpf_perf_event_output().
  *
  * At the moment BPF_KSYSCALL does not transparently handle all the calling
  * convention quirks for the following syscalls:
  *
  * - mmap(): __ARCH_WANT_SYS_OLD_MMAP.
  * - clone(): CONFIG_CLONE_BACKWARDS, CONFIG_CLONE_BACKWARDS2 and
  *            CONFIG_CLONE_BACKWARDS3.
  * - socket-related syscalls: __ARCH_WANT_SYS_SOCKETCALL.
  * - compat syscalls.
  *
  * This may or may not change in the future. User needs to take extra measures
  * to handle such quirks explicitly, if necessary.
  *
  * This macro relies on BPF CO-RE support and virtual __kconfig externs.
  */
 #define BPF_KSYSCALL(name, args...)                     \
 name(struct pt_regs *ctx);                          \
 extern _Bool LINUX_HAS_SYSCALL_WRAPPER __kconfig;               \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(struct pt_regs *ctx, ##args);                    \
 typeof(name(0)) name(struct pt_regs *ctx)                   \
 {                                       \
     struct pt_regs *regs = LINUX_HAS_SYSCALL_WRAPPER            \
                    ? (struct pt_regs *)PT_REGS_PARM1(ctx)       \
                    : ctx;                       \
     _Pragma("GCC diagnostic push")                      \
     _Pragma("GCC diagnostic ignored \"-Wint-conversion\"")          \
     if (LINUX_HAS_SYSCALL_WRAPPER)                      \
         return ____##name(___bpf_syswrap_args(args));           \
     else                                    \
         return ____##name(___bpf_syscall_args(args));           \
     _Pragma("GCC diagnostic pop")                       \
 }                                       \
 static __attribute__((always_inline)) typeof(name(0))               \
 ____##name(struct pt_regs *ctx, ##args)
 
 #define BPF_KPROBE_SYSCALL BPF_KSYSCALL
 
 #endif

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