Revision 9e0243db6169d7d1fc39a087e78fed22a2fe7071 authored by Linus Torvalds on 04 August 2016, 23:37:59 UTC, committed by Linus Torvalds on 04 August 2016, 23:37:59 UTC
Pull UML updates from Richard Weinberger: "Beside of various fixes this also contains patches to enable features such was Kcov, kmemleak and TRACE_IRQFLAGS_SUPPORT on UML" * 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common() um: Support kcov um: Enable TRACE_IRQFLAGS_SUPPORT um: Use asm-generic/irqflags.h um: Fix possible deadlock in sig_handler_common() um: Select HAVE_DEBUG_KMEMLEAK um: Setup physical memory in setup_arch() um: Eliminate null test after alloc_bootmem
tracex6_kern.c
#include <linux/ptrace.h>
#include <linux/version.h>
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"
struct bpf_map_def SEC("maps") my_map = {
.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
.key_size = sizeof(int),
.value_size = sizeof(u32),
.max_entries = 32,
};
SEC("kprobe/sys_write")
int bpf_prog1(struct pt_regs *ctx)
{
u64 count;
u32 key = bpf_get_smp_processor_id();
char fmt[] = "CPU-%d %llu\n";
count = bpf_perf_event_read(&my_map, key);
bpf_trace_printk(fmt, sizeof(fmt), key, count);
return 0;
}
char _license[] SEC("license") = "GPL";
u32 _version SEC("version") = LINUX_VERSION_CODE;
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