1*c9e208faSJiri Olsa // SPDX-License-Identifier: GPL-2.0 2*c9e208faSJiri Olsa // Copyright (c) 2018 Facebook 3*c9e208faSJiri Olsa 4*c9e208faSJiri Olsa #include <vmlinux.h> 5*c9e208faSJiri Olsa #include <bpf/bpf_helpers.h> 6*c9e208faSJiri Olsa #include <bpf/bpf_tracing.h> 7*c9e208faSJiri Olsa 8*c9e208faSJiri Olsa #ifndef PERF_MAX_STACK_DEPTH 9*c9e208faSJiri Olsa #define PERF_MAX_STACK_DEPTH 127 10*c9e208faSJiri Olsa #endif 11*c9e208faSJiri Olsa 12*c9e208faSJiri Olsa typedef __u64 stack_trace_t[PERF_MAX_STACK_DEPTH]; 13*c9e208faSJiri Olsa 14*c9e208faSJiri Olsa struct { 15*c9e208faSJiri Olsa __uint(type, BPF_MAP_TYPE_STACK_TRACE); 16*c9e208faSJiri Olsa __uint(max_entries, 16384); 17*c9e208faSJiri Olsa __type(key, __u32); 18*c9e208faSJiri Olsa __type(value, stack_trace_t); 19*c9e208faSJiri Olsa } stackmap SEC(".maps"); 20*c9e208faSJiri Olsa 21*c9e208faSJiri Olsa extern bool CONFIG_UNWINDER_ORC __kconfig __weak; 22*c9e208faSJiri Olsa 23*c9e208faSJiri Olsa /* 24*c9e208faSJiri Olsa * This function is here to have CONFIG_UNWINDER_ORC 25*c9e208faSJiri Olsa * used and added to object BTF. 26*c9e208faSJiri Olsa */ 27*c9e208faSJiri Olsa int unused(void) 28*c9e208faSJiri Olsa { 29*c9e208faSJiri Olsa return CONFIG_UNWINDER_ORC ? 0 : 1; 30*c9e208faSJiri Olsa } 31*c9e208faSJiri Olsa 32*c9e208faSJiri Olsa __u32 stack_key; 33*c9e208faSJiri Olsa 34*c9e208faSJiri Olsa SEC("kprobe.multi") 35*c9e208faSJiri Olsa int kprobe_multi_test(struct pt_regs *ctx) 36*c9e208faSJiri Olsa { 37*c9e208faSJiri Olsa stack_key = bpf_get_stackid(ctx, &stackmap, 0); 38*c9e208faSJiri Olsa return 0; 39*c9e208faSJiri Olsa } 40*c9e208faSJiri Olsa 41*c9e208faSJiri Olsa char _license[] SEC("license") = "GPL"; 42