Skip to main content

Browse the archive

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 
Merge branch 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
 
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
2 parent s b067c90 + 8a545f1
Raw File
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;
back to top