| /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ |
| #ifndef __BPF_TRACING_H__ |
| #define __BPF_TRACING_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 |
| #else |
| #undef bpf_target_defined |
| #endif |
| |
| /* Fall back to what the compiler says */ |
| #ifndef bpf_target_defined |
| #if defined(__x86_64__) |
| #define bpf_target_x86 |
| #elif defined(__s390__) |
| #define bpf_target_s390 |
| #elif defined(__arm__) |
| #define bpf_target_arm |
| #elif defined(__aarch64__) |
| #define bpf_target_arm64 |
| #elif defined(__mips__) |
| #define bpf_target_mips |
| #elif defined(__powerpc__) |
| #define bpf_target_powerpc |
| #elif defined(__sparc__) |
| #define bpf_target_sparc |
| #endif |
| #endif |
| |
| #if defined(bpf_target_x86) |
| |
| #if defined(__KERNEL__) || defined(__VMLINUX_H__) |
| |
| #define PT_REGS_PARM1(x) ((x)->di) |
| #define PT_REGS_PARM2(x) ((x)->si) |
| #define PT_REGS_PARM3(x) ((x)->dx) |
| #define PT_REGS_PARM4(x) ((x)->cx) |
| #define PT_REGS_PARM5(x) ((x)->r8) |
| #define PT_REGS_RET(x) ((x)->sp) |
| #define PT_REGS_FP(x) ((x)->bp) |
| #define PT_REGS_RC(x) ((x)->ax) |
| #define PT_REGS_SP(x) ((x)->sp) |
| #define PT_REGS_IP(x) ((x)->ip) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), di) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), si) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), dx) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), cx) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), r8) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), sp) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), bp) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), ax) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), sp) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), ip) |
| |
| #else |
| |
| #ifdef __i386__ |
| /* i386 kernel is built with -mregparm=3 */ |
| #define PT_REGS_PARM1(x) ((x)->eax) |
| #define PT_REGS_PARM2(x) ((x)->edx) |
| #define PT_REGS_PARM3(x) ((x)->ecx) |
| #define PT_REGS_PARM4(x) 0 |
| #define PT_REGS_PARM5(x) 0 |
| #define PT_REGS_RET(x) ((x)->esp) |
| #define PT_REGS_FP(x) ((x)->ebp) |
| #define PT_REGS_RC(x) ((x)->eax) |
| #define PT_REGS_SP(x) ((x)->esp) |
| #define PT_REGS_IP(x) ((x)->eip) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), eax) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), edx) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), ecx) |
| #define PT_REGS_PARM4_CORE(x) 0 |
| #define PT_REGS_PARM5_CORE(x) 0 |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), esp) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), ebp) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), eax) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), esp) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), eip) |
| |
| #else |
| |
| #define PT_REGS_PARM1(x) ((x)->rdi) |
| #define PT_REGS_PARM2(x) ((x)->rsi) |
| #define PT_REGS_PARM3(x) ((x)->rdx) |
| #define PT_REGS_PARM4(x) ((x)->rcx) |
| #define PT_REGS_PARM5(x) ((x)->r8) |
| #define PT_REGS_RET(x) ((x)->rsp) |
| #define PT_REGS_FP(x) ((x)->rbp) |
| #define PT_REGS_RC(x) ((x)->rax) |
| #define PT_REGS_SP(x) ((x)->rsp) |
| #define PT_REGS_IP(x) ((x)->rip) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), rdi) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), rsi) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), rdx) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), rcx) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), r8) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), rsp) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), rbp) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), rax) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), rsp) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), rip) |
| |
| #endif |
| #endif |
| |
| #elif defined(bpf_target_s390) |
| |
| /* s390 provides user_pt_regs instead of struct pt_regs to userspace */ |
| struct pt_regs; |
| #define PT_REGS_S390 const volatile user_pt_regs |
| #define PT_REGS_PARM1(x) (((PT_REGS_S390 *)(x))->gprs[2]) |
| #define PT_REGS_PARM2(x) (((PT_REGS_S390 *)(x))->gprs[3]) |
| #define PT_REGS_PARM3(x) (((PT_REGS_S390 *)(x))->gprs[4]) |
| #define PT_REGS_PARM4(x) (((PT_REGS_S390 *)(x))->gprs[5]) |
| #define PT_REGS_PARM5(x) (((PT_REGS_S390 *)(x))->gprs[6]) |
| #define PT_REGS_RET(x) (((PT_REGS_S390 *)(x))->gprs[14]) |
| /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_FP(x) (((PT_REGS_S390 *)(x))->gprs[11]) |
| #define PT_REGS_RC(x) (((PT_REGS_S390 *)(x))->gprs[2]) |
| #define PT_REGS_SP(x) (((PT_REGS_S390 *)(x))->gprs[15]) |
| #define PT_REGS_IP(x) (((PT_REGS_S390 *)(x))->psw.addr) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[2]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[3]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[4]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[5]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[6]) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[14]) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[11]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[2]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), gprs[15]) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_S390 *)(x), psw.addr) |
| |
| #elif defined(bpf_target_arm) |
| |
| #define PT_REGS_PARM1(x) ((x)->uregs[0]) |
| #define PT_REGS_PARM2(x) ((x)->uregs[1]) |
| #define PT_REGS_PARM3(x) ((x)->uregs[2]) |
| #define PT_REGS_PARM4(x) ((x)->uregs[3]) |
| #define PT_REGS_PARM5(x) ((x)->uregs[4]) |
| #define PT_REGS_RET(x) ((x)->uregs[14]) |
| #define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->uregs[0]) |
| #define PT_REGS_SP(x) ((x)->uregs[13]) |
| #define PT_REGS_IP(x) ((x)->uregs[12]) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), uregs[0]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), uregs[1]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), uregs[2]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), uregs[3]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), uregs[4]) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), uregs[14]) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), uregs[11]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), uregs[0]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), uregs[13]) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), uregs[12]) |
| |
| #elif defined(bpf_target_arm64) |
| |
| /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */ |
| struct pt_regs; |
| #define PT_REGS_ARM64 const volatile struct user_pt_regs |
| #define PT_REGS_PARM1(x) (((PT_REGS_ARM64 *)(x))->regs[0]) |
| #define PT_REGS_PARM2(x) (((PT_REGS_ARM64 *)(x))->regs[1]) |
| #define PT_REGS_PARM3(x) (((PT_REGS_ARM64 *)(x))->regs[2]) |
| #define PT_REGS_PARM4(x) (((PT_REGS_ARM64 *)(x))->regs[3]) |
| #define PT_REGS_PARM5(x) (((PT_REGS_ARM64 *)(x))->regs[4]) |
| #define PT_REGS_RET(x) (((PT_REGS_ARM64 *)(x))->regs[30]) |
| /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_FP(x) (((PT_REGS_ARM64 *)(x))->regs[29]) |
| #define PT_REGS_RC(x) (((PT_REGS_ARM64 *)(x))->regs[0]) |
| #define PT_REGS_SP(x) (((PT_REGS_ARM64 *)(x))->sp) |
| #define PT_REGS_IP(x) (((PT_REGS_ARM64 *)(x))->pc) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[0]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[1]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[2]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[3]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[4]) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[30]) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[29]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), regs[0]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), sp) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((PT_REGS_ARM64 *)(x), pc) |
| |
| #elif defined(bpf_target_mips) |
| |
| #define PT_REGS_PARM1(x) ((x)->regs[4]) |
| #define PT_REGS_PARM2(x) ((x)->regs[5]) |
| #define PT_REGS_PARM3(x) ((x)->regs[6]) |
| #define PT_REGS_PARM4(x) ((x)->regs[7]) |
| #define PT_REGS_PARM5(x) ((x)->regs[8]) |
| #define PT_REGS_RET(x) ((x)->regs[31]) |
| #define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->regs[1]) |
| #define PT_REGS_SP(x) ((x)->regs[29]) |
| #define PT_REGS_IP(x) ((x)->cp0_epc) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), regs[4]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), regs[5]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), regs[6]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), regs[7]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), regs[8]) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), regs[31]) |
| #define PT_REGS_FP_CORE(x) BPF_CORE_READ((x), regs[30]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), regs[1]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), regs[29]) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), cp0_epc) |
| |
| #elif defined(bpf_target_powerpc) |
| |
| #define PT_REGS_PARM1(x) ((x)->gpr[3]) |
| #define PT_REGS_PARM2(x) ((x)->gpr[4]) |
| #define PT_REGS_PARM3(x) ((x)->gpr[5]) |
| #define PT_REGS_PARM4(x) ((x)->gpr[6]) |
| #define PT_REGS_PARM5(x) ((x)->gpr[7]) |
| #define PT_REGS_RC(x) ((x)->gpr[3]) |
| #define PT_REGS_SP(x) ((x)->sp) |
| #define PT_REGS_IP(x) ((x)->nip) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), gpr[3]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), gpr[4]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), gpr[5]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), gpr[6]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), gpr[7]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), gpr[3]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), sp) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), nip) |
| |
| #elif defined(bpf_target_sparc) |
| |
| #define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0]) |
| #define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1]) |
| #define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2]) |
| #define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3]) |
| #define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4]) |
| #define PT_REGS_RET(x) ((x)->u_regs[UREG_I7]) |
| #define PT_REGS_RC(x) ((x)->u_regs[UREG_I0]) |
| #define PT_REGS_SP(x) ((x)->u_regs[UREG_FP]) |
| |
| #define PT_REGS_PARM1_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I0]) |
| #define PT_REGS_PARM2_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I1]) |
| #define PT_REGS_PARM3_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I2]) |
| #define PT_REGS_PARM4_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I3]) |
| #define PT_REGS_PARM5_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I4]) |
| #define PT_REGS_RET_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I7]) |
| #define PT_REGS_RC_CORE(x) BPF_CORE_READ((x), u_regs[UREG_I0]) |
| #define PT_REGS_SP_CORE(x) BPF_CORE_READ((x), u_regs[UREG_FP]) |
| |
| /* Should this also be a bpf_target check for the sparc case? */ |
| #if defined(__arch64__) |
| #define PT_REGS_IP(x) ((x)->tpc) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), tpc) |
| #else |
| #define PT_REGS_IP(x) ((x)->pc) |
| #define PT_REGS_IP_CORE(x) BPF_CORE_READ((x), pc) |
| #endif |
| |
| #endif |
| |
| #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(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); }) |
| #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) \ |
| ({ bpf_probe_read(&(ip), sizeof(ip), \ |
| (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) |
| #endif |
| |
| #define ___bpf_concat(a, b) a ## b |
| #define ___bpf_apply(fn, n) ___bpf_concat(fn, n) |
| #define ___bpf_nth(_, _1, _2, _3, _4, _5, _6, _7, _8, _9, _a, _b, _c, N, ...) N |
| #define ___bpf_narg(...) \ |
| ___bpf_nth(_, ##__VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) |
| #define ___bpf_empty(...) \ |
| ___bpf_nth(_, ##__VA_ARGS__, N, N, N, N, N, N, N, N, N, N, 0) |
| |
| #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) |
| |
| /* |
| * BPF_SEQ_PRINTF to wrap bpf_seq_printf to-be-printed values |
| * in a structure. |
| */ |
| #define BPF_SEQ_PRINTF(seq, fmt, args...) \ |
| ({ \ |
| _Pragma("GCC diagnostic push") \ |
| _Pragma("GCC diagnostic ignored \"-Wint-conversion\"") \ |
| static const char ___fmt[] = fmt; \ |
| unsigned long long ___param[] = { args }; \ |
| _Pragma("GCC diagnostic pop") \ |
| int ___ret = bpf_seq_printf(seq, ___fmt, sizeof(___fmt), \ |
| ___param, sizeof(___param)); \ |
| ___ret; \ |
| }) |
| |
| #endif |
