125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Add signed little endian base 128 integer to a section. 225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Copyright (C) 2002, 2005 Red Hat, Inc. 325b3c049e70834cf33790a28643ab058b507b35cBen Cheng This file is part of Red Hat elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Written by Ulrich Drepper <drepper@redhat.com>, 2002. 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 625b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 725b3c049e70834cf33790a28643ab058b507b35cBen Cheng it under the terms of the GNU General Public License as published by the 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng Free Software Foundation; version 2 of the License. 925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 1125b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 1225b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1325b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 1425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1525b3c049e70834cf33790a28643ab058b507b35cBen Cheng You should have received a copy of the GNU General Public License along 1625b3c049e70834cf33790a28643ab058b507b35cBen Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 1725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 1825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is an included package of the Open Invention Network. 2025b3c049e70834cf33790a28643ab058b507b35cBen Cheng An included package of the Open Invention Network is a package for which 2125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Open Invention Network licensees cross-license their patents. No patent 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng license is granted, either expressly or impliedly, by designation as an 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng included package. Should you wish to participate in the Open Invention 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Network licensing program, please visit www.openinventionnetwork.com 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng <http://www.openinventionnetwork.com>. */ 2625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 2725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef HAVE_CONFIG_H 2825b3c049e70834cf33790a28643ab058b507b35cBen Cheng# include <config.h> 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <inttypes.h> 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <string.h> 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <libasmP.h> 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3725b3c049e70834cf33790a28643ab058b507b35cBen Chengint 3825b3c049e70834cf33790a28643ab058b507b35cBen Chengasm_addsleb128 (asmscn, num) 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng AsmScn_t *asmscn; 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng int32_t num; 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asmscn == NULL) 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libasm_seterrno (ASM_E_TYPE); 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (asmscn->ctx->textp)) 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng fprintf (asmscn->ctx->out.file, "\t.sleb128\t%" PRId32 "\n", num); 5325b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 5425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 5525b3c049e70834cf33790a28643ab058b507b35cBen Cheng char tmpbuf[(sizeof (num) * 8 + 6) / 7]; 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *dest = tmpbuf; 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng uint32_t byte; 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng int32_t endval = num >> 31; 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (num == 0) 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng byte = 0; 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 6325b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (1) 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng byte = num & 0x7f; 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng num >>= 7; 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (num == endval) 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* This is the last byte. */ 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng *dest++ = byte | 0x80; 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng *dest++ = byte; 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Number of bytes produced. */ 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t nbytes = dest - tmpbuf; 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Make sure we have enough room. */ 8125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (__libasm_ensure_section_space (asmscn, nbytes) != 0) 8225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 8325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8425b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Copy the bytes. */ 8525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (likely (asmscn->type != SHT_NOBITS)) 8625b3c049e70834cf33790a28643ab058b507b35cBen Cheng memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); 8725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Adjust the pointer in the data buffer. */ 8925b3c049e70834cf33790a28643ab058b507b35cBen Cheng asmscn->content->len += nbytes; 9025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 9125b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Increment the offset in the (sub)section. */ 9225b3c049e70834cf33790a28643ab058b507b35cBen Cheng asmscn->offset += nbytes; 9325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 9425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 9525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 9625b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 97