[mirror_ubuntu-zesty-kernel.git] / tools / perf / util / perf_regs.c

#include <errno.h>
#include "perf_regs.h"
#include "event.h"

const struct sample_reg __weak sample_reg_masks[] = {
	SMPL_REG_END
};

#ifdef HAVE_PERF_REGS_SUPPORT
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
{
	int i, idx = 0;
	u64 mask = regs->mask;

	if (regs->cache_mask & (1 << id))
		goto out;

	if (!(mask & (1 << id)))
		return -EINVAL;

	for (i = 0; i < id; i++) {
		if (mask & (1 << i))
			idx++;
	}

	regs->cache_mask |= (1 << id);
	regs->cache_regs[id] = regs->regs[idx];

out:
	*valp = regs->cache_regs[id];
	return 0;
}
#endif
Commit	Line	Data
c9b951c4 JO	1	#include <errno.h>
c9b951c4 JO	2	#include "perf_regs.h"
0c4e774f	3	#include "event.h"
c9b951c4	4
af4aeadd SE	5	const struct sample_reg __weak sample_reg_masks[] = {
	6	SMPL_REG_END
	7	};
	8
9fb47654	9	#ifdef HAVE_PERF_REGS_SUPPORT
c9b951c4 JO	10	int perf_reg_value(u64 valp, struct regs_dump regs, int id)
	11	{
	12	int i, idx = 0;
	13	u64 mask = regs->mask;
	14
0c4e774f JO	15	if (regs->cache_mask & (1 << id))
	16	goto out;
	17
c9b951c4 JO	18	if (!(mask & (1 << id)))
	19	return -EINVAL;
	20
	21	for (i = 0; i < id; i++) {
	22	if (mask & (1 << i))
	23	idx++;
	24	}
	25
0c4e774f JO	26	regs->cache_mask \|= (1 << id);
	27	regs->cache_regs[id] = regs->regs[idx];
	28
	29	out:
	30	*valp = regs->cache_regs[id];
c9b951c4 JO	31	return 0;
c9b951c4 JO	32	}
9fb47654	33	#endif