tools/perf/arch/mips/util/unwind-libunwind.c
Source file repositories/reference/linux-study-clean/tools/perf/arch/mips/util/unwind-libunwind.c
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/arch/mips/util/unwind-libunwind.c- Extension
.c- Size
- 521 bytes
- Lines
- 23
- 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.hlibunwind.hperf_regs.h../../util/unwind.hutil/debug.h
Detected Declarations
function libunwind__arch_reg_id
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
#include "util/debug.h"
int libunwind__arch_reg_id(int regnum)
{
switch (regnum) {
case UNW_MIPS_R1 ... UNW_MIPS_R25:
return regnum - UNW_MIPS_R1 + PERF_REG_MIPS_R1;
case UNW_MIPS_R28 ... UNW_MIPS_R31:
return regnum - UNW_MIPS_R28 + PERF_REG_MIPS_R28;
case UNW_MIPS_PC:
return PERF_REG_MIPS_PC;
default:
pr_err("unwind: invalid reg id %d\n", regnum);
return -EINVAL;
}
}
Annotation
- Immediate include surface: `errno.h`, `libunwind.h`, `perf_regs.h`, `../../util/unwind.h`, `util/debug.h`.
- Detected declarations: `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.