xref: /illumos-gate/usr/src/uts/common/sys/kobj.h (revision 425251fd07ab465313fb50dea0f1ac795be10e05)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  *
25  * Copyright 2017 RackTop Systems.
26  */
27 /*
28  * Copyright (c) 2017 Joyent, Inc.
29  */
30 
31 #ifndef _SYS_KOBJ_H
32 #define	_SYS_KOBJ_H
33 
34 #include <sys/modctl.h>
35 #include <sys/elf.h>
36 #include <sys/machelf.h>
37 #include <sys/vmem.h>
38 #include <sys/sdt.h>
39 #include <sys/bootstat.h>
40 
41 #ifdef	__cplusplus
42 extern "C" {
43 #endif
44 
45 /*
46  * List of modules maintained by kobj.c
47  */
48 struct module_list {
49 	struct module_list *next;
50 	struct module *mp;
51 };
52 
53 typedef struct hotinline_desc {
54 	char	*hid_symname;		/* symbol name */
55 	uintptr_t hid_instr_offset;	/* offset of call in text */
56 	struct hotinline_desc *hid_next;	/* next hotinline */
57 } hotinline_desc_t;
58 
59 typedef unsigned short	symid_t;		/* symbol table index */
60 typedef unsigned char	*reloc_dest_t;
61 
62 typedef	void	module_mach;
63 
64 struct module {
65 	int total_allocated;
66 
67 	Ehdr hdr;
68 	char *shdrs;
69 	Shdr *symhdr, *strhdr;
70 
71 	char *depends_on;
72 
73 	size_t symsize;
74 	char *symspace;	/* symbols + strings + hashtbl, or NULL */
75 	int flags;
76 
77 	size_t text_size;
78 	size_t data_size;
79 	char *text;
80 	char *data;
81 
82 	unsigned int symtbl_section;
83 	/* pointers into symspace, or NULL */
84 	char *symtbl;
85 	char *strings;
86 
87 	unsigned int hashsize;
88 	symid_t *buckets;
89 	symid_t *chains;
90 
91 	unsigned int nsyms;
92 
93 	unsigned int bss_align;
94 	size_t bss_size;
95 	uintptr_t bss;
96 
97 	char *filename;
98 
99 	struct module_list *head, *tail;
100 	reloc_dest_t destination;
101 	module_mach * machdata;
102 	char *ctfdata;
103 	size_t ctfsize;
104 
105 	char *fbt_tab;
106 	size_t fbt_size;
107 	size_t fbt_nentries;
108 	caddr_t textwin;
109 	caddr_t textwin_base;
110 
111 	hotinline_desc_t *hi_calls;
112 
113 	sdt_probedesc_t *sdt_probes;
114 	size_t sdt_nprobes;
115 	char *sdt_tab;
116 	size_t sdt_size;
117 
118 	char *sigdata;
119 	size_t sigsize;
120 };
121 
122 struct kobj_mem {
123 	struct kobj_mem	*km_next;
124 	struct kobj_mem *km_prev;
125 	uintptr_t	km_addr;
126 	size_t		km_size;
127 	uintptr_t	km_alloc_addr;
128 	size_t		km_alloc_size;
129 };
130 
131 struct _buf {
132 	intptr_t	 _fd;
133 	char		*_ptr;
134 	char		*_base;
135 	char 		*_name;
136 	char		*_dbuf;
137 	int		 _size;
138 	int		_cnt;
139 	int		 _off;
140 	int		_ln;
141 	int		_bsize;
142 	int		_iscmp;
143 	int		_dsize;
144 };
145 
146 
147 /*
148  * Statistical info.
149  */
150 typedef struct {
151 	int nalloc;
152 	int nfree;
153 	int nalloc_calls;
154 	int nfree_calls;
155 } kobj_stat_t;
156 
157 #define	kobj_filename(p) ((p)->_name)
158 #define	kobj_linenum(p)  ((p)->_ln)
159 #define	kobj_newline(p)	 ((p)->_ln++)
160 #define	kobj_getc(p)	(--(p)->_cnt >= 0 ? ((int)*(p)->_ptr++):kobj_filbuf(p))
161 #define	kobj_ungetc(p)	 (++(p)->_cnt > (p)->_size ? -1 : ((int)*(--(p)->_ptr)))
162 #define	kobj_comphdr(p)	((struct comphdr *)(p)->_dbuf)
163 
164 /* Offset into buffer */
165 #define	B_OFFSET(file, off)	(off % (file)->_bsize)
166 
167 /* Start of page */
168 #define	F_PAGE(file, off)	(off - B_OFFSET(file, off))
169 
170 #define	F_BLKS(file, size)	((size / (file)->_bsize) * (file)->_bsize)
171 
172 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
173 
174 extern int kobj_load_module(struct modctl *, int);
175 extern void kobj_unload_module(struct modctl *);
176 extern uintptr_t kobj_lookup(struct module *, const char *);
177 extern Sym *kobj_lookup_all(struct module *, char *, int);
178 extern int kobj_addrcheck(void *, caddr_t);
179 extern int kobj_module_to_id(void *);
180 extern void kobj_getmodinfo(void *, struct modinfo *);
181 extern int kobj_get_needed(void *, short *, int);
182 extern uintptr_t kobj_getsymvalue(char *, int);
183 extern char *kobj_getsymname(uintptr_t, ulong_t *);
184 extern char *kobj_searchsym(struct module *, uintptr_t, ulong_t *);
185 
186 extern int kobj_fstat(intptr_t, struct bootstat *);
187 extern intptr_t kobj_open(char *);
188 extern int kobj_path_exists(char *, int);
189 extern struct _buf *kobj_open_path(char *, int, int);
190 extern int kobj_read(intptr_t, char *, unsigned int, unsigned int);
191 extern void kobj_close(intptr_t);
192 extern void *kobj_alloc(size_t, int);
193 extern void *kobj_zalloc(size_t, int);
194 extern void kobj_free(void *, size_t);
195 extern struct _buf *kobj_open_file(char *);
196 extern void kobj_close_file(struct _buf *);
197 extern int kobj_read_file(struct _buf *, char *, unsigned, unsigned);
198 extern int kobj_get_filesize(struct _buf *, uint64_t *size);
199 extern uintptr_t kobj_getelfsym(char *, void *, int *);
200 extern void kobj_set_ctf(struct module *, caddr_t data, size_t size);
201 extern void do_hotinlines(struct module *);
202 
203 extern int kobj_filbuf(struct _buf *);
204 extern void kobj_sync(void);
205 #if defined(__i386) || defined(__sparc) || defined(__amd64)
206 extern void kobj_vmem_init(vmem_t **, vmem_t **);
207 #else
208 #error "ISA not supported"
209 #endif
210 extern caddr_t kobj_text_alloc(vmem_t *, size_t);
211 extern caddr_t kobj_texthole_alloc(caddr_t, size_t);
212 extern void kobj_texthole_free(caddr_t, size_t);
213 extern void kobj_stat_get(kobj_stat_t *);
214 extern void kobj_textwin_alloc(struct module *);
215 extern void kobj_textwin_free(struct module *);
216 
217 #endif	/* defined(_KERNEL) || defined(_FAKE_KERNEL) */
218 
219 #ifdef	__cplusplus
220 }
221 #endif
222 
223 #endif /* !_SYS_KOBJ_H */
224