1 /*
2
3 Copyright (C) 2000,2004 Silicon Graphics, Inc. All Rights Reserved.
4
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of version 2.1 of the GNU Lesser General Public License
7 as published by the Free Software Foundation.
8
9 This program is distributed in the hope that it would be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 Further, this software is distributed without any warranty that it is
14 free of the rightful claim of any third person regarding infringement
15 or the like. Any license provided herein, whether implied or
16 otherwise, applies only to this software file. Patent licenses, if
17 any, provided herein do not apply to combinations of this program with
18 other software, or any other product whatsoever.
19
20 You should have received a copy of the GNU Lesser General Public
21 License along with this program; if not, write the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,
23 USA.
24
25 Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane,
26 Mountain View, CA 94043, or:
27
28 http://www.sgi.com
29
30 For further information regarding this notice, see:
31
32 http://oss.sgi.com/projects/GenInfo/NoticeExplan
33
34 */
35
36
37
38 #include "config.h"
39 #include "libdwarfdefs.h"
40 #include <stdio.h>
41 #include <string.h>
42 #ifdef HAVE_ELF_H
43 #include <elf.h>
44 #endif
45 #include "pro_incl.h"
46 #include "pro_line.h"
47
48 Dwarf_Unsigned _dwarf_pro_add_line_entry(Dwarf_P_Debug,
49 Dwarf_Unsigned file_index,
50 Dwarf_Addr code_address,
51 Dwarf_Unsigned symidx,
52 Dwarf_Unsigned line_no,
53 Dwarf_Signed col_no,
54 Dwarf_Bool is_stmt_begin,
55 Dwarf_Bool is_bb_begin,
56 Dwarf_Ubyte opc,
57 Dwarf_Error * error);
58
59 /*-------------------------------------------------------------------------
60 Add a entry to the line information section
61 file_index: index of file in file entries, obtained from
62 add_file_entry() call.
63
64 This function actually calls _dwarf_pro_add_line_entry(), with
65 an extra parameter, the opcode. Done so that interface calls
66 dwarf_lne_set_address() and dwarf_lne_end_sequence() can use
67 this internal routine.
68 ---------------------------------------------------------------------------*/
69 Dwarf_Unsigned
dwarf_add_line_entry(Dwarf_P_Debug dbg,Dwarf_Unsigned file_index,Dwarf_Addr code_address,Dwarf_Unsigned line_no,Dwarf_Signed col_no,Dwarf_Bool is_stmt_begin,Dwarf_Bool is_bb_begin,Dwarf_Error * error)70 dwarf_add_line_entry(Dwarf_P_Debug dbg,
71 Dwarf_Unsigned file_index,
72 Dwarf_Addr code_address,
73 Dwarf_Unsigned line_no,
74 Dwarf_Signed col_no,
75 Dwarf_Bool is_stmt_begin,
76 Dwarf_Bool is_bb_begin, Dwarf_Error * error)
77 {
78 Dwarf_Unsigned retval;
79
80 retval = _dwarf_pro_add_line_entry(dbg, file_index, code_address, 0,
81 line_no, col_no, is_stmt_begin,
82 is_bb_begin, 0, error);
83 return retval;
84 }
85
86 /*------------------------------------------------------------------------
87 Ask to emit DW_LNE_set_address opcode explicitly. Used by be
88 to emit start of a new .text section, or to force a relocated
89 address into debug line information entry.
90 -------------------------------------------------------------------------*/
91 Dwarf_Unsigned
dwarf_lne_set_address(Dwarf_P_Debug dbg,Dwarf_Addr offs,Dwarf_Unsigned symidx,Dwarf_Error * error)92 dwarf_lne_set_address(Dwarf_P_Debug dbg,
93 Dwarf_Addr offs,
94 Dwarf_Unsigned symidx, Dwarf_Error * error)
95 {
96 Dwarf_Ubyte opc;
97 Dwarf_Unsigned retval;
98
99 opc = DW_LNE_set_address;
100 retval =
101 _dwarf_pro_add_line_entry(dbg, 0, offs, symidx, 0, 0, 0, 0, opc,
102 error);
103 return retval;
104 }
105
106 /*------------------------------------------------------------------------
107 Ask to emit end_seqence opcode. Used normally at the end of a
108 compilation unit. Can also be used in the middle if there
109 are gaps in the region described by the code address.
110 -------------------------------------------------------------------------*/
111 Dwarf_Unsigned
dwarf_lne_end_sequence(Dwarf_P_Debug dbg,Dwarf_Addr end_address,Dwarf_Error * error)112 dwarf_lne_end_sequence(Dwarf_P_Debug dbg,
113 Dwarf_Addr end_address, Dwarf_Error * error)
114 {
115 Dwarf_Ubyte opc;
116 Dwarf_Unsigned retval;
117
118 opc = DW_LNE_end_sequence;
119 retval =
120 _dwarf_pro_add_line_entry(dbg, 0, end_address, 0, 0, 0, 0, 0,
121 opc, error);
122 return retval;
123 }
124
125 /*----------------------------------------------------------------------------
126 Add an entry in the internal list of lines mantained by producer.
127 Opc indicates if an opcode needs to be generated, rather than just
128 an entry in the matrix. During opcodes generation time, these
129 opcodes will be used.
130 -----------------------------------------------------------------------------*/
131 Dwarf_Unsigned
_dwarf_pro_add_line_entry(Dwarf_P_Debug dbg,Dwarf_Unsigned file_index,Dwarf_Addr code_address,Dwarf_Unsigned symidx,Dwarf_Unsigned line_no,Dwarf_Signed col_no,Dwarf_Bool is_stmt_begin,Dwarf_Bool is_bb_begin,Dwarf_Ubyte opc,Dwarf_Error * error)132 _dwarf_pro_add_line_entry(Dwarf_P_Debug dbg,
133 Dwarf_Unsigned file_index,
134 Dwarf_Addr code_address,
135 Dwarf_Unsigned symidx,
136 Dwarf_Unsigned line_no,
137 Dwarf_Signed col_no,
138 Dwarf_Bool is_stmt_begin,
139 Dwarf_Bool is_bb_begin,
140 Dwarf_Ubyte opc, Dwarf_Error * error)
141 {
142 if (dbg->de_lines == NULL) {
143 dbg->de_lines = (Dwarf_P_Line)
144 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Line_s));
145 if (dbg->de_lines == NULL) {
146 DWARF_P_DBG_ERROR(dbg, DW_DLE_LINE_ALLOC, DW_DLV_NOCOUNT);
147 }
148 dbg->de_last_line = dbg->de_lines;
149 _dwarf_pro_reg_init(dbg->de_lines);
150
151 } else {
152 dbg->de_last_line->dpl_next = (Dwarf_P_Line)
153 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Line_s));
154 if (dbg->de_last_line->dpl_next == NULL) {
155 DWARF_P_DBG_ERROR(dbg, DW_DLE_LINE_ALLOC, DW_DLV_NOCOUNT);
156 }
157 dbg->de_last_line = dbg->de_last_line->dpl_next;
158 _dwarf_pro_reg_init(dbg->de_last_line);
159 }
160 dbg->de_last_line->dpl_address = code_address;
161 dbg->de_last_line->dpl_file = (unsigned long) file_index;
162 dbg->de_last_line->dpl_line = (unsigned long) line_no;
163 dbg->de_last_line->dpl_column = (unsigned long) col_no;
164 dbg->de_last_line->dpl_is_stmt = is_stmt_begin;
165 dbg->de_last_line->dpl_basic_block = is_bb_begin;
166 dbg->de_last_line->dpl_opc = opc;
167 dbg->de_last_line->dpl_r_symidx = symidx;
168
169 return (0);
170 }
171
172 /*-----------------------------------------------------------------------
173 Add a directory declaration to the debug_line section. Stored
174 in linked list.
175 ------------------------------------------------------------------------*/
176 Dwarf_Unsigned
dwarf_add_directory_decl(Dwarf_P_Debug dbg,char * name,Dwarf_Error * error)177 dwarf_add_directory_decl(Dwarf_P_Debug dbg,
178 char *name, Dwarf_Error * error)
179 {
180 if (dbg->de_inc_dirs == NULL) {
181 dbg->de_inc_dirs = (Dwarf_P_Inc_Dir)
182 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Inc_Dir_s));
183 if (dbg->de_inc_dirs == NULL) {
184 DWARF_P_DBG_ERROR(dbg, DW_DLE_INCDIR_ALLOC, DW_DLV_NOCOUNT);
185 }
186 dbg->de_last_inc_dir = dbg->de_inc_dirs;
187 dbg->de_n_inc_dirs = 1;
188 } else {
189 dbg->de_last_inc_dir->did_next = (Dwarf_P_Inc_Dir)
190 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_Inc_Dir_s));
191 if (dbg->de_last_inc_dir->did_next == NULL) {
192 DWARF_P_DBG_ERROR(dbg, DW_DLE_INCDIR_ALLOC, DW_DLV_NOCOUNT);
193 }
194 dbg->de_last_inc_dir = dbg->de_last_inc_dir->did_next;
195 dbg->de_n_inc_dirs++;
196 }
197 dbg->de_last_inc_dir->did_name =
198 (char *) _dwarf_p_get_alloc(dbg, strlen(name) + 1);
199 if (dbg->de_last_inc_dir->did_name == NULL) {
200 DWARF_P_DBG_ERROR(dbg, DW_DLE_STRING_ALLOC, DW_DLV_NOCOUNT);
201 }
202 strcpy(dbg->de_last_inc_dir->did_name, name);
203 dbg->de_last_inc_dir->did_next = NULL;
204
205 return dbg->de_n_inc_dirs;
206 }
207
208 /*-----------------------------------------------------------------------
209 Add a file entry declaration to the debug_line section. Stored
210 in linked list. The data is immediately encodes as leb128
211 and stored in Dwarf_P_F_Entry_s struct.
212 ------------------------------------------------------------------------*/
213 Dwarf_Unsigned
dwarf_add_file_decl(Dwarf_P_Debug dbg,char * name,Dwarf_Unsigned dir_idx,Dwarf_Unsigned time_mod,Dwarf_Unsigned length,Dwarf_Error * error)214 dwarf_add_file_decl(Dwarf_P_Debug dbg,
215 char *name,
216 Dwarf_Unsigned dir_idx,
217 Dwarf_Unsigned time_mod,
218 Dwarf_Unsigned length, Dwarf_Error * error)
219 {
220 Dwarf_P_F_Entry cur;
221 char *ptr;
222 int nbytes_idx, nbytes_time, nbytes_len;
223 char buffidx[ENCODE_SPACE_NEEDED];
224 char bufftime[ENCODE_SPACE_NEEDED];
225 char bufflen[ENCODE_SPACE_NEEDED];
226 int res;
227
228 if (dbg->de_file_entries == NULL) {
229 dbg->de_file_entries = (Dwarf_P_F_Entry)
230 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_F_Entry_s));
231 if (dbg->de_file_entries == NULL) {
232 DWARF_P_DBG_ERROR(dbg, DW_DLE_FILE_ENTRY_ALLOC,
233 DW_DLV_NOCOUNT);
234 }
235 cur = dbg->de_file_entries;
236 dbg->de_last_file_entry = cur;
237 dbg->de_n_file_entries = 1;
238 } else {
239 cur = dbg->de_last_file_entry;
240 cur->dfe_next = (Dwarf_P_F_Entry)
241 _dwarf_p_get_alloc(dbg, sizeof(struct Dwarf_P_F_Entry_s));
242 if (cur->dfe_next == NULL) {
243 DWARF_P_DBG_ERROR(dbg, DW_DLE_FILE_ENTRY_ALLOC,
244 DW_DLV_NOCOUNT);
245 }
246 cur = cur->dfe_next;
247 dbg->de_last_file_entry = cur;
248 dbg->de_n_file_entries++;
249 }
250 cur->dfe_name = (char *) _dwarf_p_get_alloc(dbg, strlen(name) + 1);
251 if (cur->dfe_name == NULL) {
252 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT);
253 }
254 strcpy((char *) cur->dfe_name, name);
255 res = _dwarf_pro_encode_leb128_nm(dir_idx, &nbytes_idx,
256 buffidx, sizeof(buffidx));
257 if (res != DW_DLV_OK) {
258 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT);
259 }
260 res = _dwarf_pro_encode_leb128_nm(time_mod, &nbytes_time,
261 bufftime, sizeof(bufftime));
262 if (res != DW_DLV_OK) {
263 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT);
264 }
265 res = _dwarf_pro_encode_leb128_nm(length, &nbytes_len,
266 bufflen, sizeof(bufflen));
267 cur->dfe_args = (char *)
268 _dwarf_p_get_alloc(dbg, nbytes_idx + nbytes_time + nbytes_len);
269 if (cur->dfe_args == NULL) {
270 DWARF_P_DBG_ERROR(dbg, DW_DLE_ALLOC_FAIL, DW_DLV_NOCOUNT);
271 }
272 ptr = cur->dfe_args;
273 memcpy((void *) ptr, buffidx, nbytes_idx);
274 ptr += nbytes_idx;
275 memcpy((void *) ptr, bufftime, nbytes_time);
276 ptr += nbytes_time;
277 memcpy((void *) ptr, bufflen, nbytes_len);
278 ptr += nbytes_len;
279 cur->dfe_nbytes = nbytes_idx + nbytes_time + nbytes_len;
280 cur->dfe_next = NULL;
281
282 return dbg->de_n_file_entries;
283 }
284
285
286 /*---------------------------------------------------------------------
287 Initialize a row of the matrix for line numbers, meaning
288 initialize the struct corresponding to it
289 ----------------------------------------------------------------------*/
290 void
_dwarf_pro_reg_init(Dwarf_P_Line cur_line)291 _dwarf_pro_reg_init(Dwarf_P_Line cur_line)
292 {
293 cur_line->dpl_address = 0;
294 cur_line->dpl_file = 1;
295 cur_line->dpl_line = 1;
296 cur_line->dpl_column = 0;
297 cur_line->dpl_is_stmt = DEFAULT_IS_STMT;
298 cur_line->dpl_basic_block = false;
299 cur_line->dpl_next = NULL;
300 }
301