1 /* 2 3 Copyright (C) 2000,2004 Silicon Graphics, Inc. All Rights Reserved. 4 Portions (C) 2016 David Anderson . All Rights Reserved. 5 6 This program is free software; you can redistribute it and/or modify it 7 under the terms of version 2.1 of the GNU Lesser General Public License 8 as published by the Free Software Foundation. 9 10 This program is distributed in the hope that it would be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 13 14 Further, this software is distributed without any warranty that it is 15 free of the rightful claim of any third person regarding infringement 16 or the like. Any license provided herein, whether implied or 17 otherwise, applies only to this software file. Patent licenses, if 18 any, provided herein do not apply to combinations of this program with 19 other software, or any other product whatsoever. 20 21 You should have received a copy of the GNU Lesser General Public 22 License along with this program; if not, write the Free Software 23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301, 24 USA. 25 26 */ 27 28 29 30 31 32 /* relocation section names */ 33 extern const char *_dwarf_rel_section_names[]; 34 35 /* section names */ 36 extern const char *_dwarf_sectnames[]; 37 38 /* struct to hold relocation entries. Its mantained as a linked 39 list of relocation structs, and will then be written at as a 40 whole into the relocation section. Whether its 32 bit or 41 64 bit will be obtained from Dwarf_Debug pointer. */ 42 43 44 45 46 47 /* struct stores a chunk of data pertaining to a section */ 48 struct Dwarf_P_Section_Data_s { 49 int ds_elf_sect_no; /* elf section number */ 50 char *ds_data; /* data contained in section */ 51 unsigned long ds_nbytes; /* bytes of data used so far */ 52 unsigned long ds_orig_alloc; /* bytes allocated originally */ 53 Dwarf_P_Section_Data ds_next; /* next on the list */ 54 }; 55 56 /* Used to allow a dummy initial struct (which we 57 drop before it gets used 58 This must not match any legitimate 'section' number. 59 */ 60 #define MAGIC_SECT_NO -3 61 62 /* Size of chunk of data allocated in one alloc 63 Not clear if this is the best size. 64 Used to be just 4096 for user data, the section data struct 65 was a separate malloc. 66 */ 67 #define CHUNK_SIZE (4096 - sizeof (struct Dwarf_P_Section_Data_s)) 68 69 /* 70 chunk alloc routine - 71 if chunk->ds_data is nil, it will alloc CHUNK_SIZE bytes, 72 and return pointer to the beginning. If chunk is not nil, 73 it will see if there's enoungh space for nbytes in current 74 chunk, if not, add new chunk to linked list, and return 75 a char * pointer to it. Return null if unsuccessful. 76 */ 77 Dwarf_Small *_dwarf_pro_buffer(Dwarf_P_Debug dbg, int sectno, 78 unsigned long nbytes); 79 80 /* GET_CHUNK_ERROR is new Sept 2016 to use DW_DLV_ERROR. */ 81 #define GET_CHUNK_ERR(dbg,sectno,ptr,nbytes,error) \ 82 { \ 83 (ptr) = _dwarf_pro_buffer((dbg),(sectno),(nbytes)); \ 84 if ((ptr) == NULL) { \ 85 DWARF_P_DBG_ERROR(dbg,DW_DLE_CHUNK_ALLOC,DW_DLV_ERROR); \ 86 } \ 87 } 88 #define GET_CHUNK(dbg,sectno,ptr,nbytes,error) \ 89 { \ 90 (ptr) = _dwarf_pro_buffer((dbg),(sectno),(nbytes)); \ 91 if ((ptr) == NULL) { \ 92 DWARF_P_DBG_ERROR(dbg,DW_DLE_CHUNK_ALLOC,-1); \ 93 } \ 94 } 95 96 97 98 int _dwarf_transform_arange_to_disk(Dwarf_P_Debug dbg, 99 Dwarf_Signed *nbufs, 100 Dwarf_Error * error); 101 102 /* These are for creating ELF section type codes. 103 We are not trying to match any particulare 104 ABI's settings for section type. 105 In the producer, see de_callback_func() calls. 106 107 If SHT_MIPS_DWARF was defined sometimes 108 that was the value taken: 0x7000001e 109 If it's important to someone then 110 passing in a string like SHT=0x7000001e 111 to the 'extra' argument of dwarf_producer_init() 112 would work nicely (leading/trailing spaces 113 are allowed, as is a NULL pointer instead 114 of a string). 115 One is a convenient default for testing purposes. 116 */ 117 #define SECTION_TYPE 1 /* SHT_PROGBITS in Elf. */ 118