/*
 * Copyright (C) 2015, He Kuang <hekuang@huawei.com>
 * Copyright (C) 2015, Huawei Inc.
 */
#ifndef __BPF_PROLOGUE_H
#define __BPF_PROLOGUE_H

#include <linux/compiler.h>
#include <linux/filter.h>
#include "probe-event.h"

#define BPF_PROLOGUE_MAX_ARGS 3
#define BPF_PROLOGUE_START_ARG_REG BPF_REG_3
#define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2

#ifdef HAVE_BPF_PROLOGUE
int bpf__gen_prologue(struct probe_trace_arg *args, int nargs,
		      struct bpf_insn *new_prog, size_t *new_cnt,
		      size_t cnt_space);
#else
static inline int
bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused,
		  int nargs __maybe_unused,
		  struct bpf_insn *new_prog __maybe_unused,
		  size_t *new_cnt,
		  size_t cnt_space __maybe_unused)
{
	if (!new_cnt)
		return -EINVAL;
	*new_cnt = 0;
	return -ENOTSUP;
}
#endif
#endif /* __BPF_PROLOGUE_H */
></td><td class='form'><form method='get'>
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<option value='emaclite-cleanup'>emaclite-cleanup</option>
<option value='master'>master</option>
<option value='nds-private-remove' selected='selected'>nds-private-remove</option>
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<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
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<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/sound/usb/hiface/Makefile?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/usb/hiface/Makefile?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/usb/hiface/Makefile?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/usb/hiface/Makefile?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/usb/hiface/Makefile'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/usb?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/usb/hiface?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>hiface</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/usb/hiface/Makefile?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a'>Makefile</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/usb/hiface/Makefile?h=nds-private-remove&amp;id=7ea4007757e56bd2fb589820ba7676d2dfb0b47a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>