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1 : : /* Get CFA expression for frame. 2 : : Copyright (C) 2009-2010 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : 5 : : This file is free software; you can redistribute it and/or modify 6 : : it under the terms of either 7 : : 8 : : * the GNU Lesser General Public License as published by the Free 9 : : Software Foundation; either version 3 of the License, or (at 10 : : your option) any later version 11 : : 12 : : or 13 : : 14 : : * the GNU General Public License as published by the Free 15 : : Software Foundation; either version 2 of the License, or (at 16 : : your option) any later version 17 : : 18 : : or both in parallel, as here. 19 : : 20 : : elfutils is distributed in the hope that it will be useful, but 21 : : WITHOUT ANY WARRANTY; without even the implied warranty of 22 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 : : General Public License for more details. 24 : : 25 : : You should have received copies of the GNU General Public License and 26 : : the GNU Lesser General Public License along with this program. If 27 : : not, see <http://www.gnu.org/licenses/>. */ 28 : : 29 : : #ifdef HAVE_CONFIG_H 30 : : # include <config.h> 31 : : #endif 32 : : 33 : : #include "cfi.h" 34 : : #include <dwarf.h> 35 : : #include <stdlib.h> 36 : : 37 : : int 38 : 7151 : dwarf_frame_cfa (Dwarf_Frame *fs, Dwarf_Op **ops, size_t *nops) 39 : : { 40 : : /* Maybe there was a previous error. */ 41 [ - + ]: 7151 : if (fs == NULL) 42 : : return -1; 43 : : 44 : 7151 : int result = 0; 45 [ - + + - : 7151 : switch (fs->cfa_rule) - ] 46 : : { 47 : 0 : case cfa_undefined: 48 : 0 : *ops = NULL; 49 : 0 : *nops = 0; 50 : 0 : break; 51 : : 52 : 7145 : case cfa_offset: 53 : : /* The Dwarf_Op was already fully initialized by execute_cfi. */ 54 : 7145 : *ops = &fs->cfa_data.offset; 55 : 7145 : *nops = 1; 56 : 7145 : break; 57 : : 58 : 6 : case cfa_expr: 59 : : /* Parse the expression into internal form. */ 60 : 12 : result = __libdw_intern_expression 61 : 6 : (NULL, fs->cache->other_byte_order, 62 : 6 : fs->cache->e_ident[EI_CLASS] == ELFCLASS32 ? 4 : 8, 4, 63 [ - + ]: 6 : &fs->cache->expr_tree, &fs->cfa_data.expr, false, false, 64 : : ops, nops, IDX_debug_frame); 65 : 6 : break; 66 : : 67 : 0 : case cfa_invalid: 68 : 0 : __libdw_seterrno (DWARF_E_INVALID_CFI); 69 : 0 : result = -1; 70 : 0 : break; 71 : : 72 : 0 : default: 73 : 0 : abort (); 74 : : } 75 : : 76 : : return result; 77 : : }