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93 lines
2.3 KiB
93 lines
2.3 KiB
/* Add integer to a section. |
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Copyright (C) 2002, 2005 Red Hat, Inc. |
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This file is part of elfutils. |
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Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
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This file is free software; you can redistribute it and/or modify |
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it under the terms of either |
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* the GNU Lesser General Public License as published by the Free |
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Software Foundation; either version 3 of the License, or (at |
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your option) any later version |
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or |
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* the GNU General Public License as published by the Free |
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Software Foundation; either version 2 of the License, or (at |
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your option) any later version |
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or both in parallel, as here. |
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elfutils is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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You should have received copies of the GNU General Public License and |
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the GNU Lesser General Public License along with this program. If |
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not, see <http://www.gnu.org/licenses/>. */ |
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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#include <inttypes.h> |
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#include <string.h> |
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#include "libasmP.h" |
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int |
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asm_adduleb128 (AsmScn_t *asmscn, uint32_t num) |
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{ |
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if (asmscn == NULL) |
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return -1; |
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if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) |
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{ |
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__libasm_seterrno (ASM_E_TYPE); |
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return -1; |
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} |
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if (unlikely (asmscn->ctx->textp)) |
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fprintf (asmscn->ctx->out.file, "\t.uleb128\t%" PRIu32 "\n", num); |
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else |
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{ |
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char tmpbuf[(sizeof (num) * 8 + 6) / 7]; |
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char *dest = tmpbuf; |
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uint32_t byte; |
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while (1) |
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{ |
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byte = num & 0x7f; |
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num >>= 7; |
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if (num == 0) |
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/* This is the last byte. */ |
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break; |
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*dest++ = byte | 0x80; |
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} |
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*dest++ = byte; |
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/* Number of bytes produced. */ |
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size_t nbytes = dest - tmpbuf; |
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/* Make sure we have enough room. */ |
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if (__libasm_ensure_section_space (asmscn, nbytes) != 0) |
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return -1; |
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/* Copy the bytes. */ |
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if (likely (asmscn->type != SHT_NOBITS)) |
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memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); |
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/* Adjust the pointer in the data buffer. */ |
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asmscn->content->len += nbytes; |
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/* Increment the offset in the (sub)section. */ |
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asmscn->offset += nbytes; |
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} |
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return 0; |
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}
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