1 /* Add integer to a section. 2 Copyright (C) 2002, 2005 Red Hat, Inc. 3 This file is part of Red Hat elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 5 6 Red Hat elfutils is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by the 8 Free Software Foundation; version 2 of the License. 9 10 Red Hat elfutils is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 General Public License for more details. 14 15 You should have received a copy of the GNU General Public License along 16 with Red Hat elfutils; if not, write to the Free Software Foundation, 17 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18 19 Red Hat elfutils is an included package of the Open Invention Network. 20 An included package of the Open Invention Network is a package for which 21 Open Invention Network licensees cross-license their patents. No patent 22 license is granted, either expressly or impliedly, by designation as an 23 included package. Should you wish to participate in the Open Invention 24 Network licensing program, please visit www.openinventionnetwork.com 25 <http://www.openinventionnetwork.com>. */ 26 27 #ifdef HAVE_CONFIG_H 28 # include <config.h> 29 #endif 30 31 #include <inttypes.h> 32 #include <string.h> 33 34 #include "libasmP.h" 35 36 37 int 38 asm_adduleb128 (asmscn, num) 39 AsmScn_t *asmscn; 40 uint32_t num; 41 { 42 if (asmscn == NULL) 43 return -1; 44 45 if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) 46 { 47 __libasm_seterrno (ASM_E_TYPE); 48 return -1; 49 } 50 51 if (unlikely (asmscn->ctx->textp)) 52 fprintf (asmscn->ctx->out.file, "\t.uleb128\t%" PRIu32 "\n", num); 53 else 54 { 55 char tmpbuf[(sizeof (num) * 8 + 6) / 7]; 56 char *dest = tmpbuf; 57 uint32_t byte; 58 59 while (1) 60 { 61 byte = num & 0x7f; 62 63 num >>= 7; 64 if (num == 0) 65 /* This is the last byte. */ 66 break; 67 68 *dest++ = byte | 0x80; 69 } 70 71 *dest++ = byte; 72 73 /* Number of bytes produced. */ 74 size_t nbytes = dest - tmpbuf; 75 76 /* Make sure we have enough room. */ 77 if (__libasm_ensure_section_space (asmscn, nbytes) != 0) 78 return -1; 79 80 /* Copy the bytes. */ 81 if (likely (asmscn->type != SHT_NOBITS)) 82 memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); 83 84 /* Adjust the pointer in the data buffer. */ 85 asmscn->content->len += nbytes; 86 87 /* Increment the offset in the (sub)section. */ 88 asmscn->offset += nbytes; 89 } 90 91 return 0; 92 } 93
