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#include <stdio.h>
#include <stdlib.h>
#include <libelf.h>
#include <gelf.h>
#include <libelfu/libelfu.h>
static void elfu_modelToPhdrs(ElfuElf *me, Elf *e)
{
ElfuPhdr *mp;
size_t i;
/* Count PHDRs */
i = 0;
for (mp = me->phdrList.cqh_first;
mp != (void *)&me->phdrList;
mp = mp->elem.cqe_next) {
i++;
}
if (!gelf_newphdr(e, i)) {
fprintf(stderr, "gelf_newphdr() failed: %s\n", elf_errmsg(-1));
}
/* Copy PHDRs */
i = 0;
for (mp = me->phdrList.cqh_first;
mp != (void *)&me->phdrList;
mp = mp->elem.cqe_next) {
if (!gelf_update_phdr (e, i, &mp->phdr)) {
fprintf(stderr, "gelf_update_phdr() failed: %s\n", elf_errmsg(-1));
}
i++;
}
}
static void elfu_modelToSection(ElfuScn *ms, Elf *e)
{
Elf_Scn *scnOut;
scnOut = elf_newscn(e);
if (!scnOut) {
fprintf(stderr, "elf_newscn() failed: %s\n", elf_errmsg(-1));
return;
}
/* SHDR */
if (!gelf_update_shdr(scnOut, &ms->shdr)) {
fprintf(stderr, "gelf_update_shdr() failed: %s\n", elf_errmsg(-1));
}
/* Data */
ElfuData *md;
for (md = ms->dataList.cqh_first;
md != (void *)&ms->dataList;
md = md->elem.cqe_next) {
Elf_Data *dataOut = elf_newdata(scnOut);
if (!dataOut) {
fprintf(stderr, "elf_newdata() failed: %s\n", elf_errmsg(-1));
}
dataOut->d_align = md->data.d_align;
dataOut->d_buf = md->data.d_buf;
dataOut->d_off = md->data.d_off;
dataOut->d_type = md->data.d_type;
dataOut->d_size = md->data.d_size;
dataOut->d_version = md->data.d_version;
}
}
void elfu_modelToElf(ElfuElf *me, Elf *e)
{
ElfuScn *ms;
/* We control the ELF file's layout now. */
/* tired's libelf also offers ELF_F_LAYOUT_OVERLAP for overlapping sections. */
elf_flagelf(e, ELF_C_SET, ELF_F_LAYOUT);
/* EHDR */
if (!gelf_newehdr(e, me->elfclass)) {
fprintf(stderr, "gelf_newehdr() failed: %s\n", elf_errmsg(-1));
}
if (!gelf_update_ehdr(e, &me->ehdr)) {
fprintf(stderr, "gelf_update_ehdr() failed: %s\n", elf_errmsg(-1));
}
/* Sections */
for (ms = me->scnList.cqh_first;
ms != (void *)&me->scnList;
ms = ms->elem.cqe_next) {
elfu_modelToSection(ms, e);
}
/* PHDRs */
elfu_modelToPhdrs(me, e);
elf_flagelf(e, ELF_C_SET, ELF_F_DIRTY);
}
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