dwarf_pro_expr.c revision 1.2.8.2
1 /* $NetBSD: dwarf_pro_expr.c,v 1.2.8.2 2014/08/19 23:46:44 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 Kai Wang 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "_libdwarf.h" 30 31 __RCSID("$NetBSD: dwarf_pro_expr.c,v 1.2.8.2 2014/08/19 23:46:44 tls Exp $"); 32 ELFTC_VCSID("Id: dwarf_pro_expr.c 2074 2011-10-27 03:34:33Z jkoshy "); 33 34 static struct _Dwarf_P_Expr_Entry * 35 _dwarf_add_expr(Dwarf_P_Expr expr, Dwarf_Small opcode, Dwarf_Unsigned val1, 36 Dwarf_Unsigned val2, Dwarf_Error *error) 37 { 38 struct _Dwarf_P_Expr_Entry *ee; 39 Dwarf_Debug dbg; 40 int len; 41 42 dbg = expr != NULL ? expr->pe_dbg : NULL; 43 44 if (_dwarf_loc_expr_add_atom(expr->pe_dbg, NULL, NULL, opcode, val1, 45 val2, &len, error) != DW_DLE_NONE) 46 return (NULL); 47 assert(len > 0); 48 49 if ((ee = calloc(1, sizeof(*ee))) == NULL) { 50 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); 51 return (NULL); 52 } 53 54 STAILQ_INSERT_TAIL(&expr->pe_eelist, ee, ee_next); 55 56 ee->ee_loc.lr_atom = opcode; 57 ee->ee_loc.lr_number = val1; 58 ee->ee_loc.lr_number2 = val2; 59 ee->ee_loc.lr_offset = expr->pe_length; 60 expr->pe_length += len; 61 expr->pe_invalid = 1; 62 63 return (ee); 64 } 65 66 int 67 _dwarf_expr_into_block(Dwarf_P_Expr expr, Dwarf_Error *error) 68 { 69 struct _Dwarf_P_Expr_Entry *ee; 70 Dwarf_Debug dbg; 71 int len, pos, ret; 72 73 dbg = expr != NULL ? expr->pe_dbg : NULL; 74 75 if (expr->pe_block != NULL) { 76 free(expr->pe_block); 77 expr->pe_block = NULL; 78 } 79 80 if (expr->pe_length <= 0) { 81 DWARF_SET_ERROR(dbg, error, DW_DLE_EXPR_LENGTH_BAD); 82 return (DW_DLE_EXPR_LENGTH_BAD); 83 } 84 85 86 if ((expr->pe_block = calloc((size_t) expr->pe_length, 1)) == NULL) { 87 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); 88 return (DW_DLE_MEMORY); 89 } 90 91 pos = 0; 92 STAILQ_FOREACH(ee, &expr->pe_eelist, ee_next) { 93 assert((Dwarf_Unsigned) pos < expr->pe_length); 94 ret = _dwarf_loc_expr_add_atom(expr->pe_dbg, 95 &expr->pe_block[pos], &expr->pe_block[expr->pe_length], 96 ee->ee_loc.lr_atom, ee->ee_loc.lr_number, 97 ee->ee_loc.lr_number2, &len, error); 98 assert(ret == DW_DLE_NONE); 99 assert(len > 0); 100 pos += len; 101 } 102 103 expr->pe_invalid = 0; 104 105 return (DW_DLE_NONE); 106 } 107 108 void 109 _dwarf_expr_cleanup(Dwarf_P_Debug dbg) 110 { 111 Dwarf_P_Expr pe, tpe; 112 struct _Dwarf_P_Expr_Entry *ee, *tee; 113 114 assert(dbg != NULL && dbg->dbg_mode == DW_DLC_WRITE); 115 116 STAILQ_FOREACH_SAFE(pe, &dbg->dbgp_pelist, pe_next, tpe) { 117 STAILQ_REMOVE(&dbg->dbgp_pelist, pe, _Dwarf_P_Expr, pe_next); 118 STAILQ_FOREACH_SAFE(ee, &pe->pe_eelist, ee_next, tee) { 119 STAILQ_REMOVE(&pe->pe_eelist, ee, _Dwarf_P_Expr_Entry, 120 ee_next); 121 free(ee); 122 } 123 if (pe->pe_block) 124 free(pe->pe_block); 125 free(pe); 126 } 127 } 128 129 Dwarf_P_Expr 130 dwarf_new_expr(Dwarf_P_Debug dbg, Dwarf_Error *error) 131 { 132 Dwarf_P_Expr pe; 133 134 if (dbg == NULL) { 135 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); 136 return (DW_DLV_BADADDR); 137 } 138 139 if ((pe = calloc(1, sizeof(struct _Dwarf_P_Expr))) == NULL) { 140 DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY); 141 return (DW_DLV_BADADDR); 142 } 143 STAILQ_INIT(&pe->pe_eelist); 144 145 STAILQ_INSERT_TAIL(&dbg->dbgp_pelist, pe, pe_next); 146 pe->pe_dbg = dbg; 147 148 return (pe); 149 } 150 151 Dwarf_Unsigned 152 dwarf_add_expr_gen(Dwarf_P_Expr expr, Dwarf_Small opcode, Dwarf_Unsigned val1, 153 Dwarf_Unsigned val2, Dwarf_Error *error) 154 { 155 156 if (expr == NULL) { 157 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); 158 return (DW_DLV_NOCOUNT); 159 } 160 161 if (_dwarf_add_expr(expr, opcode, val1, val2, error) == NULL) 162 return (DW_DLV_NOCOUNT); 163 164 return (expr->pe_length); 165 } 166 167 Dwarf_Unsigned 168 dwarf_add_expr_addr(Dwarf_P_Expr expr, Dwarf_Unsigned address, 169 Dwarf_Signed sym_index, Dwarf_Error *error) 170 { 171 172 return (dwarf_add_expr_addr_b(expr, address, sym_index, error)); 173 } 174 175 Dwarf_Unsigned 176 dwarf_add_expr_addr_b(Dwarf_P_Expr expr, Dwarf_Unsigned address, 177 Dwarf_Unsigned sym_index, Dwarf_Error *error) 178 { 179 struct _Dwarf_P_Expr_Entry *ee; 180 181 if (expr == NULL) { 182 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); 183 return (DW_DLV_NOCOUNT); 184 } 185 186 if ((ee = _dwarf_add_expr(expr, DW_OP_addr, address, 0, error)) == NULL) 187 return (DW_DLV_NOCOUNT); 188 189 ee->ee_sym = sym_index; 190 191 return (expr->pe_length); 192 } 193 194 Dwarf_Unsigned 195 dwarf_expr_current_offset(Dwarf_P_Expr expr, Dwarf_Error *error) 196 { 197 198 if (expr == NULL) { 199 DWARF_SET_ERROR(NULL, error, DW_DLE_ARGUMENT); 200 return (DW_DLV_NOCOUNT); 201 } 202 203 return (expr->pe_length); 204 } 205 206 Dwarf_Addr 207 dwarf_expr_into_block(Dwarf_P_Expr expr, Dwarf_Unsigned *length, 208 Dwarf_Error *error) 209 { 210 Dwarf_Debug dbg; 211 212 dbg = expr != NULL ? expr->pe_dbg : NULL; 213 214 if (expr == NULL || length == NULL) { 215 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); 216 return ((Dwarf_Addr) (uintptr_t) DW_DLV_BADADDR); 217 } 218 219 if (expr->pe_block == NULL || expr->pe_invalid) 220 if (_dwarf_expr_into_block(expr, error) != DW_DLE_NONE) 221 return ((Dwarf_Addr) (uintptr_t) DW_DLV_BADADDR); 222 223 *length = expr->pe_length; 224 225 return ((Dwarf_Addr) (uintptr_t) expr->pe_block); 226 } 227
Indexes created Mon Mar 02 05:31:46 UTC 2026