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d0293d3392
Elf align section attribute requires syntax "align=value", but in case if '=' is missed we pass nil pointer into atoi function which cause libc to crash. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
124 lines
4.9 KiB
C
124 lines
4.9 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2010 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* Common code for outelf32 and outelf64
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*/
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#include "compiler.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include "nasm.h"
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#include "output/outform.h"
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#include "output/dwarf.h"
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#include "output/elf.h"
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#include "output/outelf.h"
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#if defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32)
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const struct elf_known_section elf_known_sections[] = {
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{ ".text", SHT_PROGBITS, SHF_ALLOC|SHF_EXECINSTR, 16 },
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{ ".rodata", SHT_PROGBITS, SHF_ALLOC, 4 },
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{ ".lrodata", SHT_PROGBITS, SHF_ALLOC, 4 },
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{ ".data", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE, 4 },
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{ ".ldata", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE, 4 },
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{ ".bss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE, 4 },
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{ ".lbss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE, 4 },
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{ ".tdata", SHT_PROGBITS, SHF_ALLOC|SHF_WRITE|SHF_TLS, 4 },
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{ ".tbss", SHT_NOBITS, SHF_ALLOC|SHF_WRITE|SHF_TLS, 4 },
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{ ".comment", SHT_PROGBITS, 0, 1 },
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{ NULL, SHT_PROGBITS, SHF_ALLOC, 1 } /* default */
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};
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/* parse section attributes */
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void section_attrib(char *name, char *attr, int pass,
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uint32_t *flags_and, uint32_t *flags_or,
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uint64_t *align, int *type)
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{
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char *opt, *val, *next;
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opt = nasm_skip_spaces(attr);
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if (!opt || !*opt)
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return;
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while ((opt = nasm_opt_val(opt, &val, &next))) {
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if (!nasm_stricmp(opt, "align") && val) {
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*align = atoi(val);
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if (*align == 0) {
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*align = SHA_ANY;
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} else if (!is_power2(*align)) {
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nasm_error(ERR_NONFATAL,
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"section alignment %"PRId64" is not a power of two",
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*align);
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*align = SHA_ANY;
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}
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} else if (!nasm_stricmp(opt, "alloc")) {
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*flags_and |= SHF_ALLOC;
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*flags_or |= SHF_ALLOC;
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} else if (!nasm_stricmp(opt, "noalloc")) {
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*flags_and |= SHF_ALLOC;
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*flags_or &= ~SHF_ALLOC;
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} else if (!nasm_stricmp(opt, "exec")) {
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*flags_and |= SHF_EXECINSTR;
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*flags_or |= SHF_EXECINSTR;
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} else if (!nasm_stricmp(opt, "noexec")) {
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*flags_and |= SHF_EXECINSTR;
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*flags_or &= ~SHF_EXECINSTR;
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} else if (!nasm_stricmp(opt, "write")) {
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*flags_and |= SHF_WRITE;
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*flags_or |= SHF_WRITE;
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} else if (!nasm_stricmp(opt, "tls")) {
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*flags_and |= SHF_TLS;
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*flags_or |= SHF_TLS;
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} else if (!nasm_stricmp(opt, "nowrite")) {
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*flags_and |= SHF_WRITE;
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*flags_or &= ~SHF_WRITE;
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} else if (!nasm_stricmp(opt, "progbits")) {
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*type = SHT_PROGBITS;
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} else if (!nasm_stricmp(opt, "nobits")) {
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*type = SHT_NOBITS;
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} else if (pass == 1) {
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nasm_error(ERR_WARNING,
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"Unknown section attribute '%s' ignored on"
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" declaration of section `%s'", opt, name);
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}
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opt = next;
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}
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}
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#endif /* defined(OF_ELF32) || defined(OF_ELF64) || defined(OF_ELFX32) */
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