tools/perf/util/annotate-arch/annotate-arm64.c

Source file repositories/reference/linux-study-clean/tools/perf/util/annotate-arch/annotate-arm64.c

File Facts

System
Linux kernel
Corpus path
tools/perf/util/annotate-arch/annotate-arm64.c
Extension
.c
Size
2791 bytes
Lines
128
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

struct arch_arm64 {
	struct arch arch;
	regex_t call_insn;
	regex_t jump_insn;
};

static int arm64_mov__parse(const struct arch *arch __maybe_unused,
			    struct ins_operands *ops,
			    struct map_symbol *ms __maybe_unused,
			    struct disasm_line *dl __maybe_unused)
{
	char *s = strchr(ops->raw, ','), *target, *endptr;

	if (s == NULL)
		return -1;

	*s = '\0';
	ops->source.raw = strdup(ops->raw);
	*s = ',';

	if (ops->source.raw == NULL)
		return -1;

	target = ++s;
	ops->target.raw = strdup(target);
	if (ops->target.raw == NULL)
		goto out_free_source;

	ops->target.addr = strtoull(target, &endptr, 16);
	if (endptr == target)
		goto out_free_target;

	s = strchr(endptr, '<');
	if (s == NULL)
		goto out_free_target;
	endptr = strchr(s + 1, '>');
	if (endptr == NULL)
		goto out_free_target;

	*endptr = '\0';
	*s = ' ';
	ops->target.name = strdup(s);
	*s = '<';
	*endptr = '>';
	if (ops->target.name == NULL)
		goto out_free_target;

	return 0;

out_free_target:
	zfree(&ops->target.raw);
out_free_source:
	zfree(&ops->source.raw);
	return -1;
}

static const struct ins_ops arm64_mov_ops = {
	.parse	   = arm64_mov__parse,
	.scnprintf = mov__scnprintf,
};

static const struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
{
	struct arch_arm64 *arm = container_of(arch, struct arch_arm64, arch);
	const struct ins_ops *ops;
	regmatch_t match[2];

	if (!regexec(&arm->jump_insn, name, 2, match, 0))
		ops = &jump_ops;
	else if (!regexec(&arm->call_insn, name, 2, match, 0))
		ops = &call_ops;
	else if (!strcmp(name, "ret"))
		ops = &ret_ops;
	else
		ops = &arm64_mov_ops;

	arch__associate_ins_ops(arch, name, ops);
	return ops;
}

const struct arch *arch__new_arm64(const struct e_machine_and_e_flags *id,
				   const char *cpuid __maybe_unused)
{
	int err;
	struct arch_arm64 *arm = zalloc(sizeof(*arm));
	struct arch *arch;

	if (!arm)
		return NULL;

Annotation

Implementation Notes