| Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Helper functions for form handling. |
| 2 | Copyright (C) 2000, 2002 Red Hat, Inc. |
| 3 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 4 | |
| 5 | This program is Open Source software; you can redistribute it and/or |
| 6 | modify it under the terms of the Open Software License version 1.0 as |
| 7 | published by the Open Source Initiative. |
| 8 | |
| 9 | You should have received a copy of the Open Software License along |
| 10 | with this program; if not, you may obtain a copy of the Open Software |
| 11 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 12 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 13 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 14 | |
| 15 | #ifdef HAVE_CONFIG_H |
| 16 | # include <config.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <dwarf.h> |
| 20 | #include <string.h> |
| 21 | |
| 22 | #include <libdwarfP.h> |
| 23 | |
| 24 | |
| 25 | int |
| 26 | internal_function |
| 27 | __libdwarf_form_val_len (Dwarf_Debug dbg, Dwarf_CU_Info cu, Dwarf_Word form, |
| 28 | Dwarf_Small *valp, size_t *len, Dwarf_Error *error) |
| 29 | { |
| 30 | Dwarf_Small *saved; |
| 31 | Dwarf_Word u128; |
| 32 | |
| 33 | switch (form) |
| 34 | { |
| 35 | case DW_FORM_addr: |
| 36 | case DW_FORM_strp: |
| 37 | case DW_FORM_ref_addr: |
| 38 | *len = cu->address_size; |
| 39 | break; |
| 40 | |
| 41 | case DW_FORM_block1: |
| 42 | *len = *valp + 1; |
| 43 | break; |
| 44 | |
| 45 | case DW_FORM_block2: |
| 46 | *len = read_2ubyte_unaligned (dbg, valp) + 2; |
| 47 | break; |
| 48 | |
| 49 | case DW_FORM_block4: |
| 50 | *len = read_4ubyte_unaligned (dbg, valp) + 4; |
| 51 | break; |
| 52 | |
| 53 | case DW_FORM_block: |
| 54 | saved = valp; |
| 55 | get_uleb128 (u128, valp); |
| 56 | *len = u128 + (valp - saved); |
| 57 | break; |
| 58 | |
| 59 | case DW_FORM_ref1: |
| 60 | case DW_FORM_data1: |
| 61 | case DW_FORM_flag: |
| 62 | *len = 1; |
| 63 | break; |
| 64 | |
| 65 | case DW_FORM_data2: |
| 66 | case DW_FORM_ref2: |
| 67 | *len = 2; |
| 68 | break; |
| 69 | |
| 70 | case DW_FORM_data4: |
| 71 | case DW_FORM_ref4: |
| 72 | *len = 4; |
| 73 | break; |
| 74 | |
| 75 | case DW_FORM_data8: |
| 76 | case DW_FORM_ref8: |
| 77 | *len = 8; |
| 78 | break; |
| 79 | |
| 80 | case DW_FORM_string: |
| 81 | *len = strlen ((char *) valp) + 1; |
| 82 | break; |
| 83 | |
| 84 | case DW_FORM_sdata: |
| 85 | case DW_FORM_udata: |
| 86 | case DW_FORM_ref_udata: |
| 87 | saved = valp; |
| 88 | get_uleb128 (u128, valp); |
| 89 | *len = valp - saved; |
| 90 | break; |
| 91 | |
| 92 | case DW_FORM_indirect: |
| 93 | saved = valp; |
| 94 | get_uleb128 (u128, valp); |
| 95 | if (__libdwarf_form_val_len (dbg, cu, u128, valp, len, error) |
| 96 | != DW_DLV_OK) |
| 97 | return DW_DLV_ERROR; |
| 98 | *len += valp - saved; |
| 99 | break; |
| 100 | |
| 101 | default: |
| 102 | __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| 103 | return DW_DLV_ERROR; |
| 104 | } |
| 105 | |
| 106 | return DW_DLV_OK; |
| 107 | } |