perf_regs.c
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// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include "perf_regs.h"
#include "event.h"
int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused,
char **new_op __maybe_unused)
{
return SDT_ARG_SKIP;
}
uint64_t __weak arch__intr_reg_mask(void)
{
return PERF_REGS_MASK;
}
uint64_t __weak arch__user_reg_mask(void)
{
return PERF_REGS_MASK;
}
#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 & (1ULL << id))
goto out;
if (!(mask & (1ULL << id)))
return -EINVAL;
for (i = 0; i < id; i++) {
if (mask & (1ULL << i))
idx++;
}
regs->cache_mask |= (1ULL << id);
regs->cache_regs[id] = regs->regs[idx];
out:
*valp = regs->cache_regs[id];
return 0;
}
#endif