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