1/*	$NetBSD: link_elf.h,v 1.13 2020/09/22 01:52:16 kamil Exp $	*/
 2
 3#ifndef _LINK_ELF_H_
 4#define	_LINK_ELF_H_
 5
 6#include <sys/types.h>
 7#include <sys/exec_elf.h>
 8
 9#define R_DEBUG_VERSION	1 /* SVR4 Protocol version */
10
11typedef struct link_map {
12	caddr_t		 l_addr;	/* Base Address of library */
13#ifdef __mips__
14	caddr_t		 l_offs;	/* Load Offset of library */
15#endif
16	const char	*l_name;	/* Absolute Path to Library */
17	void		*l_ld;		/* Pointer to .dynamic in memory */
18	struct link_map	*l_next;	/* linked list of mapped libs */
19	struct link_map *l_prev;
20} Link_map;
21
22/*
23 * Debug rendezvous struct. Pointer to this is set up in the
24 * target code pointed by the DT_DEBUG tag. If it is
25 * defined.
26 */
27struct r_debug {
28	int r_version;			/* protocol version */
29	struct link_map *r_map;		/* list of loaded images */
30
31	/*
32	 * This is the address of a function internal to the run-time linker,
33	 * that will always be called when the linker begins to map in a
34	 * library or unmap it, and again when the mapping change is complete.
35	 * The debugger can set a breakpoint at this address if it wants to
36	 * notice shared object mapping changes.
37	 */
38	void (*r_brk)(void);		/* pointer to break point */
39	enum {
40		/*
41		 * This state value describes the mapping change taking place
42		 * when the `r_brk' address is called.
43		 */
44		RT_CONSISTENT,		/* things are stable */
45		RT_ADD,			/* adding a shared library */
46		RT_DELETE		/* removing a shared library */
47	} r_state;
48	void *r_ldbase;			/* base address of RTLD */
49};
50
51struct dl_phdr_info
52{
53	Elf_Addr dlpi_addr;			/* module relocation base */
54	const char *dlpi_name;			/* module name */
55	const Elf_Phdr *dlpi_phdr;		/* pointer to module's phdr */
56	Elf_Half dlpi_phnum;			/* number of entries in phdr */
57	unsigned long long int dlpi_adds;	/* total # of loads */
58	unsigned long long int dlpi_subs;	/* total # of unloads */
59	size_t dlpi_tls_modid;
60	void *dlpi_tls_data;
61};
62
63__BEGIN_DECLS
64
65int dl_iterate_phdr(int (*)(struct dl_phdr_info *, size_t, void *),
66    void *);
67
68__END_DECLS
69
70#endif	/* _LINK_ELF_H_ */