1 /* Add integer to a section. 2 Copyright (C) 2002 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 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 <inttypes.h> 20 #include <string.h> 21 22 #include "libasmP.h" 23 24 25 int 26 asm_adduleb128 (asmscn, num) 27 AsmScn_t *asmscn; 28 uint32_t num; 29 { 30 if (asmscn == NULL) 31 return -1; 32 33 if (asmscn->type == SHT_NOBITS && unlikely (num != 0)) 34 { 35 __libasm_seterrno (ASM_E_TYPE); 36 return -1; 37 } 38 39 if (unlikely (asmscn->ctx->textp)) 40 printf ("\t.uleb128\t%" PRIu32 "\n", num); 41 else 42 { 43 char tmpbuf[(sizeof (num) * 8 + 6) / 7]; 44 char *dest = tmpbuf; 45 uint32_t byte; 46 47 while (1) 48 { 49 byte = num & 0x7f; 50 51 num >>= 7; 52 if (num == 0) 53 /* This is the last byte. */ 54 break; 55 56 *dest++ = byte | 0x80; 57 } 58 59 *dest++ = byte; 60 61 /* Number of bytes produced. */ 62 size_t nbytes = dest - tmpbuf; 63 64 /* Make sure we have enough room. */ 65 if (__libasm_ensure_section_space (asmscn, nbytes) != 0) 66 return -1; 67 68 /* Copy the bytes. */ 69 if (likely (asmscn->type != SHT_NOBITS)) 70 memcpy (&asmscn->content->data[asmscn->content->len], tmpbuf, nbytes); 71 72 /* Adjust the pointer in the data buffer. */ 73 asmscn->content->len += nbytes; 74 75 /* Increment the offset in the (sub)section. */ 76 asmscn->offset += nbytes; 77 } 78 79 return 0; 80 } 81
