tools/perf/arch/x86/util/unwind-libunwind.c
Source file repositories/reference/linux-study-clean/tools/perf/arch/x86/util/unwind-libunwind.c
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/arch/x86/util/unwind-libunwind.c- Extension
.c- Size
- 2016 bytes
- Lines
- 116
- 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.
Dependency Surface
errno.h../../util/debug.hlibunwind.hperf_regs.h../../util/unwind.h
Detected Declarations
function LIBUNWIND__ARCH_REG_IDfunction LIBUNWIND__ARCH_REG_ID
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include "../../util/debug.h"
#ifndef REMOTE_UNWIND_LIBUNWIND
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
#endif
#ifdef HAVE_ARCH_X86_64_SUPPORT
int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;
switch (regnum) {
case UNW_X86_64_RAX:
id = PERF_REG_X86_AX;
break;
case UNW_X86_64_RDX:
id = PERF_REG_X86_DX;
break;
case UNW_X86_64_RCX:
id = PERF_REG_X86_CX;
break;
case UNW_X86_64_RBX:
id = PERF_REG_X86_BX;
break;
case UNW_X86_64_RSI:
id = PERF_REG_X86_SI;
break;
case UNW_X86_64_RDI:
id = PERF_REG_X86_DI;
break;
case UNW_X86_64_RBP:
id = PERF_REG_X86_BP;
break;
case UNW_X86_64_RSP:
id = PERF_REG_X86_SP;
break;
case UNW_X86_64_R8:
id = PERF_REG_X86_R8;
break;
case UNW_X86_64_R9:
id = PERF_REG_X86_R9;
break;
case UNW_X86_64_R10:
id = PERF_REG_X86_R10;
break;
case UNW_X86_64_R11:
id = PERF_REG_X86_R11;
break;
case UNW_X86_64_R12:
id = PERF_REG_X86_R12;
break;
case UNW_X86_64_R13:
id = PERF_REG_X86_R13;
break;
case UNW_X86_64_R14:
id = PERF_REG_X86_R14;
break;
case UNW_X86_64_R15:
id = PERF_REG_X86_R15;
break;
case UNW_X86_64_RIP:
id = PERF_REG_X86_IP;
break;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
return -EINVAL;
}
return id;
}
#else
int LIBUNWIND__ARCH_REG_ID(int regnum)
{
int id;
switch (regnum) {
case UNW_X86_EAX:
id = PERF_REG_X86_AX;
break;
case UNW_X86_EDX:
id = PERF_REG_X86_DX;
break;
case UNW_X86_ECX:
id = PERF_REG_X86_CX;
break;
case UNW_X86_EBX:
Annotation
- Immediate include surface: `errno.h`, `../../util/debug.h`, `libunwind.h`, `perf_regs.h`, `../../util/unwind.h`.
- Detected declarations: `function LIBUNWIND__ARCH_REG_ID`, `function LIBUNWIND__ARCH_REG_ID`.
- 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.