Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Add signed little endian base 128 integer to a section. |
Ulrich Drepper | a38998e | 2005-08-03 02:05:39 +0000 | [diff] [blame] | 2 | Copyright (C) 2002, 2005 Red Hat, Inc. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 3 | This file is part of Red Hat elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 5 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 9 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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, |
Ulrich Drepper | 1e9ef50 | 2006-04-04 22:29:06 +0000 | [diff] [blame] | 17 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 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_addsleb128 (asmscn, num) |
| 39 | AsmScn_t *asmscn; |
| 40 | int32_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)) |
Ulrich Drepper | a38998e | 2005-08-03 02:05:39 +0000 | [diff] [blame] | 52 | fprintf (asmscn->ctx->out.file, "\t.sleb128\t%" PRId32 "\n", num); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 53 | else |
| 54 | { |
| 55 | char tmpbuf[(sizeof (num) * 8 + 6) / 7]; |
| 56 | char *dest = tmpbuf; |
| 57 | uint32_t byte; |
| 58 | int32_t endval = num >> 31; |
| 59 | |
| 60 | if (num == 0) |
| 61 | byte = 0; |
| 62 | else |
| 63 | while (1) |
| 64 | { |
| 65 | byte = num & 0x7f; |
| 66 | |
| 67 | num >>= 7; |
| 68 | if (num == endval) |
| 69 | /* This is the last byte. */ |
| 70 | break; |
| 71 | |
| 72 | *dest++ = byte | 0x80; |
| 73 | } |
| 74 | |
| 75 | *dest++ = byte; |
| 76 | |
| 77 | /* Number of bytes produced. */ |
| 78 | size_t nbytes = dest - tmpbuf; |
| 79 | |
| 80 | /* Make sure we have enough room. */ |
| 81 | if (__libasm_ensure_section_space (asmscn, nbytes) != 0) |
| 82 | return -1; |
| 83 | |
| 84 | /* Copy the bytes. */ |
| 85 | if (likely (asmscn->type != SHT_NOBITS)) |
| 86 | memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); |
| 87 | |
| 88 | /* Adjust the pointer in the data buffer. */ |
| 89 | asmscn->content->len += nbytes; |
| 90 | |
| 91 | /* Increment the offset in the (sub)section. */ |
| 92 | asmscn->offset += nbytes; |
| 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |