perf tools arm64: Add support for generating bpf prologue

PERF_HAVE_DWARF_REGS := 1

endif

PERF_HAVE_JITDUMP := 1

PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1

#include <stddef.h>

#include <dwarf-regs.h>

#include <linux/ptrace.h> /* for struct user_pt_regs */

#include "util.h"

struct pt_regs_dwarfnum {

	const char *name;

	unsigned int dwarfnum;

};

#define STR(s) #s

#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}

#define GPR_DWARFNUM_NAME(num) \

	{.name = STR(%x##num), .dwarfnum = num}

#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}

#define DWARFNUM2OFFSET(index) \

	(index * sizeof((struct user_pt_regs *)0)->regs[0])

/*

 * Reference:

			return roff->name;

	return NULL;

}

int regs_query_register_offset(const char *name)

{

	const struct pt_regs_dwarfnum *roff;

	for (roff = regdwarfnum_table; roff->name != NULL; roff++)

		if (!strcmp(roff->name, name))

			return DWARFNUM2OFFSET(roff->dwarfnum);

	return -EINVAL;

}