buildid.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _LINUX_BUILDID_H
 3#define _LINUX_BUILDID_H
 4
 5#include <linux/types.h>
 6
 7#define BUILD_ID_SIZE_MAX 20
 8
 9struct vm_area_struct;
10struct file;
11
12int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id, __u32 *size);
13int build_id_parse_file(struct file *file, unsigned char *build_id, __u32 *size);
14int build_id_parse_nofault(struct vm_area_struct *vma, unsigned char *build_id, __u32 *size);
15int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size);
16
17#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
18extern unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX];
19void init_vmlinux_build_id(void);
20#else
21static inline void init_vmlinux_build_id(void) { }
22#endif
23
24struct freader {
25	void *buf;
26	u32 buf_sz;
27	int err;
28	union {
29		struct {
30			struct file *file;
31			struct folio *folio;
32			void *addr;
33			loff_t folio_off;
34			bool may_fault;
35		};
36		struct {
37			const char *data;
38			u64 data_sz;
39		};
40	};
41};
42
43void freader_init_from_file(struct freader *r, void *buf, u32 buf_sz,
44			    struct file *file, bool may_fault);
45void freader_init_from_mem(struct freader *r, const char *data, u64 data_sz);
46const void *freader_fetch(struct freader *r, loff_t file_off, size_t sz);
47void freader_cleanup(struct freader *r);
48
49#endif