/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
#ifndef __BPF_TRACING_H__
#define __BPF_TRACING_H__
#include "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
#elif defined (__TARGET_ARCH_loongarch)
#define bpf_target_loongarch
#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
#elif defined (__loongarch__)
#define bpf_target_loongarch
#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)
/*
* https : //en.wikipedia.org/wiki/X86_calling_conventions#System_V_AMD64_ABI
*/
#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_PARM6_REG r9
/*
* Syscall uses r10 for PARM4 . See arch / x86 / entry / entry_64 . S : entry_SYSCALL_64
* comments in Linux sources . And refer to syscall ( 2 ) manpage .
*/
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG r10
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#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
#else
#ifdef __i386__
/* i386 kernel is built with -mregparm=3 */
#define __PT_PARM1_REG eax
#define __PT_PARM2_REG edx
#define __PT_PARM3_REG ecx
/* i386 syscall ABI is very different, refer to syscall(2) manpage */
#define __PT_PARM1_SYSCALL_REG ebx
#define __PT_PARM2_SYSCALL_REG ecx
#define __PT_PARM3_SYSCALL_REG edx
#define __PT_PARM4_SYSCALL_REG esi
#define __PT_PARM5_SYSCALL_REG edi
#define __PT_PARM6_SYSCALL_REG ebp
#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_PARM6_REG r9
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG r10
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#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
#endif /* __i386__ */
#endif /* __KERNEL__ || __VMLINUX_H__ */
#elif defined (bpf_target_s390)
/*
* https : //github.com/IBM/s390x-abi/releases/download/v1.6/lzsabi_s390x.pdf
*/
struct pt_regs___s390 {
unsigned long orig_gpr2;
} __attribute__((preserve_access_index));
/* 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_PARM1_SYSCALL_REG orig_gpr2
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG gprs[7 ]
#define PT_REGS_PARM1_SYSCALL(x) (((const struct pt_regs___s390 *)(x))->__PT_PARM1_SYSCALL_REG)
#define PT_REGS_PARM1_CORE_SYSCALL(x) \
BPF_CORE_READ((const struct pt_regs___s390 *)(x), __PT_PARM1_SYSCALL_REG)
#define __PT_RET_REG gprs[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
#elif defined (bpf_target_arm)
/*
* https : //github.com/ARM-software/abi-aa/blob/main/aapcs32/aapcs32.rst#machine-registers
*/
#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_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG uregs[4 ]
#define __PT_PARM6_SYSCALL_REG uregs[5 ]
#define __PT_PARM7_SYSCALL_REG uregs[6 ]
#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)
/*
* https : //github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#machine-registers
*/
struct pt_regs___arm64 {
unsigned long orig_x0;
} __attribute__((preserve_access_index));
/* 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_PARM6_REG regs[5 ]
#define __PT_PARM7_REG regs[6 ]
#define __PT_PARM8_REG regs[7 ]
#define __PT_PARM1_SYSCALL_REG orig_x0
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#define PT_REGS_PARM1_SYSCALL(x) (((const struct pt_regs___arm64 *)(x))->__PT_PARM1_SYSCALL_REG)
#define PT_REGS_PARM1_CORE_SYSCALL(x) \
BPF_CORE_READ((const struct pt_regs___arm64 *)(x), __PT_PARM1_SYSCALL_REG)
#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
#elif defined (bpf_target_mips)
/*
* N64 ABI is assumed right now .
* https : //en.wikipedia.org/wiki/MIPS_architecture#Calling_conventions
*/
#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_PARM6_REG regs[9 ]
#define __PT_PARM7_REG regs[10 ]
#define __PT_PARM8_REG regs[11 ]
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG /* only N32/N64 */
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG /* only N32/N64 */
#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)
/*
* http : //refspecs.linux-foundation.org/elf/elfspec_ppc.pdf (page 3-14,
* section " Function Calling Sequence " )
*/
#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_PARM6_REG gpr[8 ]
#define __PT_PARM7_REG gpr[9 ]
#define __PT_PARM8_REG gpr[10 ]
/* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#define __PT_PARM1_SYSCALL_REG orig_gpr3
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#if !defined (__arch64__)
#define __PT_PARM7_SYSCALL_REG __PT_PARM7_REG /* only powerpc (not powerpc64) */
#endif
#define __PT_RET_REG regs[31 ]
#define __PT_FP_REG __unsupported__
#define __PT_RC_REG gpr[3 ]
#define __PT_SP_REG gpr[1 ]
#define __PT_IP_REG nip
#elif defined (bpf_target_sparc)
/*
* https : //en.wikipedia.org/wiki/Calling_convention#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_PARM6_REG u_regs[UREG_I5]
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#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)
/*
* https : //github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-cc.adoc#risc-v-calling-conventions
*/
struct pt_regs___riscv {
unsigned long orig_a0;
} __attribute__((preserve_access_index));
/* riscv provides struct user_regs_struct instead of struct pt_regs to userspace */
#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_PARM6_REG a5
#define __PT_PARM7_REG a6
#define __PT_PARM8_REG a7
#define __PT_PARM1_SYSCALL_REG orig_a0
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#define PT_REGS_PARM1_SYSCALL(x) (((const struct pt_regs___riscv *)(x))->__PT_PARM1_SYSCALL_REG)
#define PT_REGS_PARM1_CORE_SYSCALL(x) \
BPF_CORE_READ((const struct pt_regs___riscv *)(x), __PT_PARM1_SYSCALL_REG)
#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
#elif defined (bpf_target_arc)
/*
* Section " Function Calling Sequence " ( page 24 ) :
* https : //raw.githubusercontent.com/wiki/foss-for-synopsys-dwc-arc-processors/toolchain/files/ARCv2_ABI.pdf
*/
/* arc provides struct user_regs_struct 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_PARM6_REG scratch.r5
#define __PT_PARM7_REG scratch.r6
#define __PT_PARM8_REG scratch.r7
/* arc does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#define __PT_RET_REG scratch.blink
#define __PT_FP_REG scratch.fp
#define __PT_RC_REG scratch.r0
#define __PT_SP_REG scratch.sp
#define __PT_IP_REG scratch.ret
#elif defined (bpf_target_loongarch)
/*
* https : //docs.kernel.org/loongarch/introduction.html
* https : //loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html
*/
/* loongarch 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[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_PARM6_REG regs[9 ]
#define __PT_PARM7_REG regs[10 ]
#define __PT_PARM8_REG regs[11 ]
/* loongarch does not select ARCH_HAS_SYSCALL_WRAPPER. */
#define PT_REGS_SYSCALL_REGS(ctx) ctx
#define __PT_PARM1_SYSCALL_REG __PT_PARM1_REG
#define __PT_PARM2_SYSCALL_REG __PT_PARM2_REG
#define __PT_PARM3_SYSCALL_REG __PT_PARM3_REG
#define __PT_PARM4_SYSCALL_REG __PT_PARM4_REG
#define __PT_PARM5_SYSCALL_REG __PT_PARM5_REG
#define __PT_PARM6_SYSCALL_REG __PT_PARM6_REG
#define __PT_RET_REG regs[1 ]
#define __PT_FP_REG regs[22 ]
#define __PT_RC_REG regs[4 ]
#define __PT_SP_REG regs[3 ]
#define __PT_IP_REG csr_era
#endif
#if defined (bpf_target_defined)
struct pt_regs;
/* allow some architectures to override `struct pt_regs` */
#ifndef __PT_REGS_CAST
#define __PT_REGS_CAST(x) (x)
#endif
/*
* Different architectures support different number of arguments passed
* through registers . i386 supports just 3 , some arches support up to 8 .
*/
#ifndef __PT_PARM4_REG
#define __PT_PARM4_REG __unsupported__
#endif
#ifndef __PT_PARM5_REG
#define __PT_PARM5_REG __unsupported__
#endif
#ifndef __PT_PARM6_REG
#define __PT_PARM6_REG __unsupported__
#endif
#ifndef __PT_PARM7_REG
#define __PT_PARM7_REG __unsupported__
#endif
#ifndef __PT_PARM8_REG
#define __PT_PARM8_REG __unsupported__
#endif
/*
* Similarly , syscall - specific conventions might differ between function call
* conventions within each architecture . All supported architectures pass
* either 6 or 7 syscall arguments in registers .
*
* See syscall ( 2 ) manpage for succinct table with information on each arch .
*/
#ifndef __PT_PARM7_SYSCALL_REG
#define __PT_PARM7_SYSCALL_REG __unsupported__
#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_PARM6(x) (__PT_REGS_CAST(x)->__PT_PARM6_REG)
#define PT_REGS_PARM7(x) (__PT_REGS_CAST(x)->__PT_PARM7_REG)
#define PT_REGS_PARM8(x) (__PT_REGS_CAST(x)->__PT_PARM8_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_PARM6_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM6_REG)
#define PT_REGS_PARM7_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM7_REG)
#define PT_REGS_PARM8_CORE(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM8_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) || defined (bpf_target_arm64)
#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_CAST(x)->__PT_PARM1_SYSCALL_REG)
#define PT_REGS_PARM1_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM1_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM2_SYSCALL
#define PT_REGS_PARM2_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM2_SYSCALL_REG)
#define PT_REGS_PARM2_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM2_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM3_SYSCALL
#define PT_REGS_PARM3_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM3_SYSCALL_REG)
#define PT_REGS_PARM3_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM3_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM4_SYSCALL
#define PT_REGS_PARM4_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM4_SYSCALL_REG)
#define PT_REGS_PARM4_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM4_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM5_SYSCALL
#define PT_REGS_PARM5_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM5_SYSCALL_REG)
#define PT_REGS_PARM5_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM5_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM6_SYSCALL
#define PT_REGS_PARM6_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM6_SYSCALL_REG)
#define PT_REGS_PARM6_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM6_SYSCALL_REG)
#endif
#ifndef PT_REGS_PARM7_SYSCALL
#define PT_REGS_PARM7_SYSCALL(x) (__PT_REGS_CAST(x)->__PT_PARM7_SYSCALL_REG)
#define PT_REGS_PARM7_CORE_SYSCALL(x) BPF_CORE_READ(__PT_REGS_CAST(x), __PT_PARM7_SYSCALL_REG)
#endif
#else /* defined(bpf_target_defined) */
#define PT_REGS_PARM1(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM2(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM3(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM4(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM5(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM6(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM7(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM8(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_RET(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_FP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_RC(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_SP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_IP(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM1_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM2_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM3_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM4_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM5_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM6_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM7_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM8_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_RET_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_FP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_RC_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_SP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_IP_CORE(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM1_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM2_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM3_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM4_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM5_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM6_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM7_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM1_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM2_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM3_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM4_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM5_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM6_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#define PT_REGS_PARM7_CORE_SYSCALL(x) ({ _Pragma(__BPF_TARGET_MISSING); 0 l; })
#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(), ctx[0 ]
#define ___bpf_ctx_cast2(x, args...) ___bpf_ctx_cast1(args), ctx[1 ]
#define ___bpf_ctx_cast3(x, args...) ___bpf_ctx_cast2(args), ctx[2 ]
#define ___bpf_ctx_cast4(x, args...) ___bpf_ctx_cast3(args), ctx[3 ]
#define ___bpf_ctx_cast5(x, args...) ___bpf_ctx_cast4(args), ctx[4 ]
#define ___bpf_ctx_cast6(x, args...) ___bpf_ctx_cast5(args), ctx[5 ]
#define ___bpf_ctx_cast7(x, args...) ___bpf_ctx_cast6(args), ctx[6 ]
#define ___bpf_ctx_cast8(x, args...) ___bpf_ctx_cast7(args), ctx[7 ]
#define ___bpf_ctx_cast9(x, args...) ___bpf_ctx_cast8(args), ctx[8 ]
#define ___bpf_ctx_cast10(x, args...) ___bpf_ctx_cast9(args), ctx[9 ]
#define ___bpf_ctx_cast11(x, args...) ___bpf_ctx_cast10(args), ctx[10 ]
#define ___bpf_ctx_cast12(x, args...) ___bpf_ctx_cast11(args), 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 requiring 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 __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 __always_inline typeof(name(0 )) \
____## name(unsigned long long *ctx, ## args)
#ifndef ___bpf_nth2
#define ___bpf_nth2(_, _1 , _2 , _3 , _4 , _5 , _6 , _7 , _8 , _9 , _10 , _11 , _12 , _13 , \
_14 , _15 , _16 , _17 , _18 , _19 , _20 , _21 , _22 , _23 , _24 , N, ...) N
#endif
#ifndef ___bpf_narg2
#define ___bpf_narg2(...) \
___bpf_nth2(_, ## __VA_ARGS__, 12 , 12 , 11 , 11 , 10 , 10 , 9 , 9 , 8 , 8 , 7 , 7 , \
6 , 6 , 5 , 5 , 4 , 4 , 3 , 3 , 2 , 2 , 1 , 1 , 0 )
#endif
#define ___bpf_treg_cnt(t) \
__builtin_choose_expr(sizeof (t) == 1 , 1 , \
__builtin_choose_expr(sizeof (t) == 2 , 1 , \
__builtin_choose_expr(sizeof (t) == 4 , 1 , \
__builtin_choose_expr(sizeof (t) == 8 , 1 , \
__builtin_choose_expr(sizeof (t) == 16 , 2 , \
(void )0 )))))
#define ___bpf_reg_cnt0() (0 )
#define ___bpf_reg_cnt1(t, x) (___bpf_reg_cnt0() + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt2(t, x, args...) (___bpf_reg_cnt1(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt3(t, x, args...) (___bpf_reg_cnt2(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt4(t, x, args...) (___bpf_reg_cnt3(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt5(t, x, args...) (___bpf_reg_cnt4(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt6(t, x, args...) (___bpf_reg_cnt5(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt7(t, x, args...) (___bpf_reg_cnt6(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt8(t, x, args...) (___bpf_reg_cnt7(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt9(t, x, args...) (___bpf_reg_cnt8(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt10(t, x, args...) (___bpf_reg_cnt9(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt11(t, x, args...) (___bpf_reg_cnt10(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt12(t, x, args...) (___bpf_reg_cnt11(args) + ___bpf_treg_cnt(t))
#define ___bpf_reg_cnt(args...) ___bpf_apply(___bpf_reg_cnt, ___bpf_narg2(args))(args)
#define ___bpf_union_arg(t, x, n) \
__builtin_choose_expr(sizeof (t) == 1 , ({ union { __u8 z[1 ]; t x; } ___t = { .z = {ctx[n]}}; ___t.x; }), \
__builtin_choose_expr(sizeof (t) == 2 , ({ union { __u16 z[1 ]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \
__builtin_choose_expr(sizeof (t) == 4 , ({ union { __u32 z[1 ]; t x; } ___t = { .z = {ctx[n]} }; ___t.x; }), \
__builtin_choose_expr(sizeof (t) == 8 , ({ union { __u64 z[1 ]; t x; } ___t = {.z = {ctx[n]} }; ___t.x; }), \
__builtin_choose_expr(sizeof (t) == 16 , ({ union { __u64 z[2 ]; t x; } ___t = {.z = {ctx[n], ctx[n + 1 ]} }; ___t.x; }), \
(void )0 )))))
#define ___bpf_ctx_arg0(n, args...)
#define ___bpf_ctx_arg1(n, t, x) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt1(t, x))
#define ___bpf_ctx_arg2(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt2(t, x, args)) ___bpf_ctx_arg1(n, args)
#define ___bpf_ctx_arg3(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt3(t, x, args)) ___bpf_ctx_arg2(n, args)
#define ___bpf_ctx_arg4(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt4(t, x, args)) ___bpf_ctx_arg3(n, args)
#define ___bpf_ctx_arg5(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt5(t, x, args)) ___bpf_ctx_arg4(n, args)
#define ___bpf_ctx_arg6(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt6(t, x, args)) ___bpf_ctx_arg5(n, args)
#define ___bpf_ctx_arg7(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt7(t, x, args)) ___bpf_ctx_arg6(n, args)
#define ___bpf_ctx_arg8(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt8(t, x, args)) ___bpf_ctx_arg7(n, args)
#define ___bpf_ctx_arg9(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt9(t, x, args)) ___bpf_ctx_arg8(n, args)
#define ___bpf_ctx_arg10(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt10(t, x, args)) ___bpf_ctx_arg9(n, args)
#define ___bpf_ctx_arg11(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt11(t, x, args)) ___bpf_ctx_arg10(n, args)
#define ___bpf_ctx_arg12(n, t, x, args...) , ___bpf_union_arg(t, x, n - ___bpf_reg_cnt12(t, x, args)) ___bpf_ctx_arg11(n, args)
#define ___bpf_ctx_arg(args...) ___bpf_apply(___bpf_ctx_arg, ___bpf_narg2(args))(___bpf_reg_cnt(args), args)
#define ___bpf_ctx_decl0()
#define ___bpf_ctx_decl1(t, x) , t x
#define ___bpf_ctx_decl2(t, x, args...) , t x ___bpf_ctx_decl1(args)
#define ___bpf_ctx_decl3(t, x, args...) , t x ___bpf_ctx_decl2(args)
#define ___bpf_ctx_decl4(t, x, args...) , t x ___bpf_ctx_decl3(args)
#define ___bpf_ctx_decl5(t, x, args...) , t x ___bpf_ctx_decl4(args)
#define ___bpf_ctx_decl6(t, x, args...) , t x ___bpf_ctx_decl5(args)
#define ___bpf_ctx_decl7(t, x, args...) , t x ___bpf_ctx_decl6(args)
#define ___bpf_ctx_decl8(t, x, args...) , t x ___bpf_ctx_decl7(args)
#define ___bpf_ctx_decl9(t, x, args...) , t x ___bpf_ctx_decl8(args)
#define ___bpf_ctx_decl10(t, x, args...) , t x ___bpf_ctx_decl9(args)
#define ___bpf_ctx_decl11(t, x, args...) , t x ___bpf_ctx_decl10(args)
#define ___bpf_ctx_decl12(t, x, args...) , t x ___bpf_ctx_decl11(args)
#define ___bpf_ctx_decl(args...) ___bpf_apply(___bpf_ctx_decl, ___bpf_narg2(args))(args)
/*
* BPF_PROG2 is an enhanced version of BPF_PROG in order to handle struct
* arguments . Since each struct argument might take one or two u64 values
* in the trampoline stack , argument type size is needed to place proper number
* of u64 values for each argument . Therefore , BPF_PROG2 has different
* syntax from BPF_PROG . For example , for the following BPF_PROG syntax :
*
* int BPF_PROG ( test2 , int a , int b ) { . . . }
*
* the corresponding BPF_PROG2 syntax is :
*
* int BPF_PROG2 ( test2 , int , a , int , b ) { . . . }
*
* where type and the corresponding argument name are separated by comma .
*
* Use BPF_PROG2 macro if one of the arguments might be a struct / union larger
* than 8 bytes :
*
* int BPF_PROG2 ( test_struct_arg , struct bpf_testmod_struct_arg_1 , a , int , b ,
* int , c , int , d , struct bpf_testmod_struct_arg_2 , e , int , ret )
* {
* // access a, b, c, d, e, and ret directly
* . . .
* }
*/
#define BPF_PROG2(name, args...) \
name(unsigned long long *ctx); \
static __always_inline typeof(name(0 )) \
____## name(unsigned long long *ctx ___bpf_ctx_decl(args)); \
typeof(name(0 )) name(unsigned long long *ctx) \
{ \
return ____## name(ctx ___bpf_ctx_arg(args)); \
} \
static __always_inline typeof(name(0 )) \
____## name(unsigned long long *ctx ___bpf_ctx_decl(args))
struct pt_regs;
#define ___bpf_kprobe_args0() ctx
#define ___bpf_kprobe_args1(x) ___bpf_kprobe_args0(), (unsigned long long )PT_REGS_PARM1(ctx)
#define ___bpf_kprobe_args2(x, args...) ___bpf_kprobe_args1(args), (unsigned long long )PT_REGS_PARM2(ctx)
#define ___bpf_kprobe_args3(x, args...) ___bpf_kprobe_args2(args), (unsigned long long )PT_REGS_PARM3(ctx)
#define ___bpf_kprobe_args4(x, args...) ___bpf_kprobe_args3(args), (unsigned long long )PT_REGS_PARM4(ctx)
#define ___bpf_kprobe_args5(x, args...) ___bpf_kprobe_args4(args), (unsigned long long )PT_REGS_PARM5(ctx)
#define ___bpf_kprobe_args6(x, args...) ___bpf_kprobe_args5(args), (unsigned long long )PT_REGS_PARM6(ctx)
#define ___bpf_kprobe_args7(x, args...) ___bpf_kprobe_args6(args), (unsigned long long )PT_REGS_PARM7(ctx)
#define ___bpf_kprobe_args8(x, args...) ___bpf_kprobe_args7(args), (unsigned long long )PT_REGS_PARM8(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 parameters .
*
* 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 __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 __always_inline typeof(name(0 )) \
____## name(struct pt_regs *ctx, ## args)
#define ___bpf_kretprobe_args0() ctx
#define ___bpf_kretprobe_args1(x) ___bpf_kretprobe_args0(), (unsigned long long )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 __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(), (unsigned long long )PT_REGS_PARM1_SYSCALL(regs)
#define ___bpf_syscall_args2(x, args...) ___bpf_syscall_args1(args), (unsigned long long )PT_REGS_PARM2_SYSCALL(regs)
#define ___bpf_syscall_args3(x, args...) ___bpf_syscall_args2(args), (unsigned long long )PT_REGS_PARM3_SYSCALL(regs)
#define ___bpf_syscall_args4(x, args...) ___bpf_syscall_args3(args), (unsigned long long )PT_REGS_PARM4_SYSCALL(regs)
#define ___bpf_syscall_args5(x, args...) ___bpf_syscall_args4(args), (unsigned long long )PT_REGS_PARM5_SYSCALL(regs)
#define ___bpf_syscall_args6(x, args...) ___bpf_syscall_args5(args), (unsigned long long )PT_REGS_PARM6_SYSCALL(regs)
#define ___bpf_syscall_args7(x, args...) ___bpf_syscall_args6(args), (unsigned long long )PT_REGS_PARM7_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(), (unsigned long long )PT_REGS_PARM1_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args2(x, args...) ___bpf_syswrap_args1(args), (unsigned long long )PT_REGS_PARM2_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args3(x, args...) ___bpf_syswrap_args2(args), (unsigned long long )PT_REGS_PARM3_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args4(x, args...) ___bpf_syswrap_args3(args), (unsigned long long )PT_REGS_PARM4_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args5(x, args...) ___bpf_syswrap_args4(args), (unsigned long long )PT_REGS_PARM5_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args6(x, args...) ___bpf_syswrap_args5(args), (unsigned long long )PT_REGS_PARM6_CORE_SYSCALL(regs)
#define ___bpf_syswrap_args7(x, args...) ___bpf_syswrap_args6(args), (unsigned long long )PT_REGS_PARM7_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 __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 __always_inline typeof(name(0 )) \
____## name(struct pt_regs *ctx, ## args)
#define BPF_KPROBE_SYSCALL BPF_KSYSCALL
/* BPF_UPROBE and BPF_URETPROBE are identical to BPF_KPROBE and BPF_KRETPROBE,
* but are named way less confusingly for SEC ( " uprobe " ) and SEC ( " uretprobe " )
* use cases .
*/
#define BPF_UPROBE(name, args...) BPF_KPROBE(name, ## args)
#define BPF_URETPROBE(name, args...) BPF_KRETPROBE(name, ## args)
#endif
Messung V0.5 in Prozent C=98 H=95 G=96
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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