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/* This file is part of centaur.
*
* centaur is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License 2 as
* published by the Free Software Foundation.
* centaur is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with centaur. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <libelfu/libelfu.h>
static void* modelToPhdr(ElfuElf *me, ElfuPhdr *mp, void *aux1, void *aux2)
{
size_t *i = (size_t*)aux1;
Elf *e = (Elf*)aux2;
if (!gelf_update_phdr (e, *i, &mp->phdr)) {
ELFU_WARNELF("gelf_update_phdr");
}
*i += 1;
/* Continue */
return NULL;
}
static void* modelToSection(ElfuElf *me, ElfuScn *ms, void *aux1, void *aux2)
{
Elf_Scn *scnOut;
Elf *e = (Elf*)aux1;
(void) me;
(void) aux2;
scnOut = elf_newscn(e);
if (!scnOut) {
ELFU_WARNELF("elf_newscn");
return (void*)-1;
}
/* SHDR */
if (ms->linkptr) {
ms->shdr.sh_link = elfu_mScnIndex(me, ms->linkptr);
}
if (ms->infoptr) {
ms->shdr.sh_info = elfu_mScnIndex(me, ms->infoptr);
}
if (!gelf_update_shdr(scnOut, &ms->shdr)) {
ELFU_WARNELF("gelf_update_shdr");
}
/* Data */
if (ms->databuf) {
Elf_Data *dataOut = elf_newdata(scnOut);
if (!dataOut) {
ELFU_WARNELF("elf_newdata");
}
dataOut->d_align = 1;
dataOut->d_buf = ms->databuf;
dataOut->d_off = 0;
dataOut->d_type = ELF_T_BYTE;
dataOut->d_size = ms->shdr.sh_size;
dataOut->d_version = elf_version(EV_NONE);
}
return NULL;
}
void elfu_mToElf(ElfuElf *me, Elf *e)
{
size_t i = 0;
if (me->symtab) {
elfu_mSymtabFlatten(me);
}
/* We control the ELF file's layout now. */
/* tired's libelf also offers ELF_F_LAYOUT_OVERLAP for overlapping sections,
* but we don't want that since we filtered it out in the reading stage
* already. It would be too mind-blowing to handle the dependencies between
* the PHDRs and sections then... */
elf_flagelf(e, ELF_C_SET, ELF_F_LAYOUT);
/* EHDR */
if (!gelf_newehdr(e, me->elfclass)) {
ELFU_WARNELF("gelf_newehdr");
}
if (me->shstrtab) {
me->ehdr.e_shstrndx = elfu_mScnIndex(me, me->shstrtab);
}
if (!gelf_update_ehdr(e, &me->ehdr)) {
ELFU_WARNELF("gelf_update_ehdr");
}
/* Sections */
elfu_mScnForall(me, modelToSection, e, NULL);
/* PHDRs */
if (!gelf_newphdr(e, elfu_mPhdrCount(me))) {
ELFU_WARNELF("gelf_newphdr");
}
elfu_mPhdrForall(me, modelToPhdr, &i, e);
elfu_eReorderPhdrs(e);
/* Done */
elf_flagelf(e, ELF_C_SET, ELF_F_DIRTY);
}
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