perf_regs.c 521 字节
Newer Older
1 2
#include <errno.h>
#include "perf_regs.h"
3
#include "event.h"
4

5 6 7 8
const struct sample_reg __weak sample_reg_masks[] = {
	SMPL_REG_END
};

9 10 11 12 13
int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
{
	int i, idx = 0;
	u64 mask = regs->mask;

14 15 16
	if (regs->cache_mask & (1 << id))
		goto out;

17 18 19 20 21 22 23 24
	if (!(mask & (1 << id)))
		return -EINVAL;

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

25 26 27 28 29
	regs->cache_mask |= (1 << id);
	regs->cache_regs[id] = regs->regs[idx];

out:
	*valp = regs->cache_regs[id];
30 31
	return 0;
}