tools/perf/util/perf_regs.c

Source file repositories/reference/linux-study-clean/tools/perf/util/perf_regs.c

File Facts

System
Linux kernel
Corpus path
tools/perf/util/perf_regs.c
Extension
.c
Size
5273 bytes
Lines
252
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <elf.h>
#include <errno.h>
#include <string.h>
#include "dwarf-regs.h"
#include "perf_regs.h"
#include "util/sample.h"
#include "debug.h"

int perf_sdt_arg_parse_op(uint16_t e_machine, char *old_op, char **new_op)
{
	int ret = SDT_ARG_SKIP;

	switch (e_machine) {
	case EM_AARCH64:
		ret = __perf_sdt_arg_parse_op_arm64(old_op, new_op);
		break;
	case EM_PPC:
	case EM_PPC64:
		ret = __perf_sdt_arg_parse_op_powerpc(old_op, new_op);
		break;
	case EM_386:
	case EM_X86_64:
		ret = __perf_sdt_arg_parse_op_x86(old_op, new_op);
		break;
	case EM_S390:
		ret = __perf_sdt_arg_parse_op_s390(old_op, new_op);
		break;
	default:
		pr_debug("Unknown ELF machine %d, standard arguments parse will be skipped.\n",
			 e_machine);
		break;
	}

	return ret;
}

uint64_t perf_intr_reg_mask(uint16_t e_machine)
{
	uint64_t mask = 0;

	switch (e_machine) {
	case EM_ARM:
		mask = __perf_reg_mask_arm(/*intr=*/true);
		break;
	case EM_AARCH64:
		mask = __perf_reg_mask_arm64(/*intr=*/true);
		break;
	case EM_CSKY:
		mask = __perf_reg_mask_csky(/*intr=*/true);
		break;
	case EM_LOONGARCH:
		mask = __perf_reg_mask_loongarch(/*intr=*/true);
		break;
	case EM_MIPS:
		mask = __perf_reg_mask_mips(/*intr=*/true);
		break;
	case EM_PPC:
	case EM_PPC64:
		mask = __perf_reg_mask_powerpc(/*intr=*/true);
		break;
	case EM_RISCV:
		mask = __perf_reg_mask_riscv(/*intr=*/true);
		break;
	case EM_S390:
		mask = __perf_reg_mask_s390(/*intr=*/true);
		break;
	case EM_386:
	case EM_X86_64:
		mask = __perf_reg_mask_x86(/*intr=*/true);
		break;
	default:
		pr_debug("Unknown ELF machine %d, interrupt sampling register mask will be empty.\n",
			 e_machine);
		break;
	}

	return mask;
}

uint64_t perf_user_reg_mask(uint16_t e_machine)
{
	uint64_t mask = 0;

	switch (e_machine) {
	case EM_ARM:
		mask = __perf_reg_mask_arm(/*intr=*/false);
		break;
	case EM_AARCH64:
		mask = __perf_reg_mask_arm64(/*intr=*/false);

Annotation

Implementation Notes