tools/perf/util/annotate-arch/annotate-arm.c
Source file repositories/reference/linux-study-clean/tools/perf/util/annotate-arch/annotate-arm.c
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/util/annotate-arch/annotate-arm.c- Extension
.c- Size
- 1582 bytes
- Lines
- 69
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
stdlib.hlinux/compiler.hlinux/zalloc.herrno.hregex.h../annotate.h../disasm.h
Detected Declarations
struct arch_arm
Annotated Snippet
struct arch_arm {
struct arch arch;
regex_t call_insn;
regex_t jump_insn;
};
static const struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name)
{
struct arch_arm *arm = container_of(arch, struct arch_arm, arch);
const struct ins_ops *ops;
regmatch_t match[2];
if (!regexec(&arm->call_insn, name, 2, match, 0))
ops = &call_ops;
else if (!regexec(&arm->jump_insn, name, 2, match, 0))
ops = &jump_ops;
else
return NULL;
arch__associate_ins_ops(arch, name, ops);
return ops;
}
const struct arch *arch__new_arm(const struct e_machine_and_e_flags *id,
const char *cpuid __maybe_unused)
{
int err;
struct arch_arm *arm = zalloc(sizeof(*arm));
struct arch *arch;
if (!arm)
return NULL;
arch = &arm->arch;
arch->name = "arm";
arch->id = *id;
arch->objdump.comment_char = ';';
arch->objdump.skip_functions_char = '+';
arch->associate_instruction_ops = arm__associate_instruction_ops;
#define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED);
if (err)
goto out_free_arm;
err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED);
if (err)
goto out_free_call;
#undef ARM_CONDS
return arch;
out_free_call:
regfree(&arm->call_insn);
out_free_arm:
free(arm);
errno = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
return NULL;
}
Annotation
- Immediate include surface: `stdlib.h`, `linux/compiler.h`, `linux/zalloc.h`, `errno.h`, `regex.h`, `../annotate.h`, `../disasm.h`.
- Detected declarations: `struct arch_arm`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.