telf_status
rootfs_build(telf_ctx *ctx)
{
telf_status ret;
telf_obj *root_obj = NULL;
telf_obj *sections_obj = NULL;
telf_obj *libs_obj = NULL;
telf_obj *header_obj = NULL;
root_obj = elf_obj_new(ctx, "/", NULL,
ELF_ROOTDIR,
ELF_S_IFDIR);
if (! root_obj) {
ERR("root obj creation failed");
ret = ELF_FAILURE;
goto err;
}
sections_obj = elf_obj_new(ctx, "sections", root_obj,
ELF_SECTION,
ELF_S_IFDIR);
if (! sections_obj) {
ERR("section obj creation failed");
ret = ELF_FAILURE;
goto err;
}
libs_obj = elf_obj_new(ctx, "libs", root_obj,
ELF_LIBS,
ELF_S_IFDIR);
if (! libs_obj) {
ERR("libs obj creation failed");
ret = ELF_FAILURE;
goto err;
}
header_obj = elf_obj_new(ctx, "header", root_obj,
ELF_HEADER,
ELF_S_IFDIR);
if (! header_obj) {
ERR("header obj creation failed");
ret = ELF_FAILURE;
goto err;
}
list_add(root_obj->entries, sections_obj);
list_add(root_obj->entries, libs_obj);
list_add(root_obj->entries, header_obj);
/* and finally... */
ctx->root = root_obj;
ret = ELF_SUCCESS;
err:
return ret;
}
telf_status
symentryfs_build(telf_ctx *ctx,
telf_obj *parent)
{
telf_status ret;
telf_status rc;
telf_obj *entry = NULL;
int i;
for (i = 0; i < N_ELEMS(symentryfs_fcb); i++) {
telf_fcb *fcb = symentryfs_fcb + i;
entry = elf_obj_new(ctx, fcb->str, parent,
ELF_SYMBOL_ENTRY,
ELF_S_IFREG);
if (! entry) {
ERR("can't build entry '%s'", fcb->str);
continue;
}
entry->free_func = fcb->freecontent_func;
entry->fill_func = fcb->setcontent_func;
symentryfs_override_driver(entry->driver);
list_add(parent->entries, entry);
}
ret = ELF_SUCCESS;
end:
return ret;
}
telf_status
symentryfs_build(telf_ctx *ctx,
telf_obj *parent)
{
telf_obj *entry = NULL;
for (size_t i = 0; i < N_ELEMS(symentryfs_fcb); i++) {
telf_fcb *fcb = symentryfs_fcb + i;
entry = elf_obj_new(ctx, fcb->str, parent,
ELF_SYMBOL_ENTRY,
ELF_S_IFREG);
if (! entry) {
ERR("can't build entry '%s'", fcb->str);
continue;
}
entry->free_func = fcb->freecontent_func;
entry->fill_func = fcb->fillcontent_func;
list_add(parent->entries, entry);
}
return ELF_SUCCESS;
}
telf_status
headerfs_build(telf_ctx *ctx)
{
telf_obj *header_obj = NULL;
telf_status ret;
telf_status rc;
rc = elf_namei(ctx, "/header", &header_obj);
if (ELF_SUCCESS != rc) {
ERR("can't find '/header' object: %s",
elf_status_to_str(rc));
ret = rc;
goto end;
}
/* now add the pseudo files */
for (size_t i = 0; i < N_ELEMS(headerfs_fcb); i++) {
telf_obj *entry = NULL;
telf_fcb *fcb = headerfs_fcb + i;
entry = elf_obj_new(ctx, fcb->str, header_obj,
ELF_HEADER_ENTRY,
ELF_S_IFREG);
if (! entry) {
ERR("can't build entry '%s'", fcb->str);
continue;
}
headerfs_override_driver(entry->driver);
entry->free_func = fcb->freecontent_func;
entry->fill_func = fcb->fillcontent_func;
list_add(header_obj->entries, entry);
}
ret = ELF_SUCCESS;
end:
return ret;
}
telf_status
libfs_build(telf_ctx *ctx)
{
telf_status ret;
telf_status rc;
telf_obj *libfs_obj = NULL;
telf_obj *entry = NULL;
int i;
Elf64_Shdr *shdr = NULL;
Elf64_Dyn *dyn = NULL;
/* sanity check */
rc = elf_namei(ctx, "/libs", &libfs_obj);
if (ELF_SUCCESS != rc) {
ERR("can't find '/libfs' object: %s", elf_status_to_str(rc));
ret = rc;
goto end;
}
shdr = elf_getsectionbytype(ctx, SHT_DYNAMIC);
if (! shdr) {
ERR("can't find any SHT_DYNAMIC section");
ret = ELF_ENOENT;
goto end;
}
/* get all DT_NEEDED strings. */
for (i = 0; i < shdr->sh_size / sizeof(Elf64_Dyn); i++) {
telf_obj *entry = NULL;
char *libname = NULL;
dyn = (Elf64_Dyn *) (ctx->addr + shdr->sh_offset) + i;
if (DT_NEEDED != dyn->d_tag)
continue;
libname = strdup(ctx->dstrtab + dyn->d_un.d_val);
if (! libname) {
ERR("strdup(%s): %s", libname, strerror(errno));
ret = ELF_ENOMEM;
goto end;
}
entry = elf_obj_new(ctx, libname, libfs_obj,
ELF_LIBS_ENTRY,
ELF_S_IFLNK);
if (! entry) {
ERR("can't build entry '%s'", libname);
continue;
}
libfs_override_driver(entry->driver);
list_add(libfs_obj->entries, entry);
}
rc = elf_set_default_libpath(ctx);
if (ELF_SUCCESS != rc) {
ERR("Can't set libpath list");
ret = rc;
goto end;
}
ret = ELF_SUCCESS;
end:
return ret;
}
