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Atmosphere/stratosphere/loader/source/ldr_nro.cpp

134 lines
4.3 KiB
C++

/*
* Copyright (c) 2018 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <switch.h>
#include <algorithm>
#include <cstdio>
#include <functional>
#include <cstring>
#include "sha256.h"
#include "ldr_nro.hpp"
#include "ldr_registration.hpp"
#include "ldr_map.hpp"
#include "ldr_random.hpp"
Result NroUtils::ValidateNrrHeader(NrrHeader *header, u64 size, u64 title_id_min) {
if (header->magic != MAGIC_NRR0) {
return 0x6A09;
}
if (header->nrr_size != size) {
return 0xA409;
}
/* TODO: Check NRR signature. */
if (false) {
return 0x6C09;
}
if (header->title_id_min != title_id_min) {
return 0x6A09;
}
return 0x0;
}
Result NroUtils::LoadNro(Registration::Process *target_proc, Handle process_h, u64 nro_heap_address, u64 nro_heap_size, u64 bss_heap_address, u64 bss_heap_size, u64 *out_address) {
NroHeader *nro;
MappedCodeMemory mcm_nro = {0};
MappedCodeMemory mcm_bss = {0};
unsigned int i;
Result rc;
u8 nro_hash[0x20];
struct sha256_state sha_ctx;
/* Ensure there is an available NRO slot. */
if (std::all_of(target_proc->nro_infos.begin(), target_proc->nro_infos.end(), std::mem_fn(&Registration::NroInfo::in_use))) {
return 0x6E09;
}
for (i = 0; i < 0x200; i++) {
if (R_SUCCEEDED(mcm_nro.Open(process_h, target_proc->is_64_bit_addspace, nro_heap_address, nro_heap_size))) {
if (R_SUCCEEDED(mcm_bss.OpenAtAddress(process_h, bss_heap_address, bss_heap_size, mcm_nro.code_memory_address + nro_heap_size))) {
break;
} else {
mcm_nro.Close();
}
}
}
if (i >= 0x200) {
return 0x6609;
}
if (R_FAILED((rc = mcm_nro.Map()))) {
goto LOAD_NRO_END;
}
nro = (NroHeader *)mcm_nro.mapped_address;
if (nro->magic != MAGIC_NRO0) {
rc = 0x6809;
goto LOAD_NRO_END;
}
if (nro->nro_size != nro_heap_size || nro->bss_size != bss_heap_size) {
rc = 0x6809;
goto LOAD_NRO_END;
}
if ((nro->text_size & 0xFFF) || (nro->ro_size & 0xFFF) || (nro->rw_size & 0xFFF) || (nro->bss_size & 0xFFF)) {
rc = 0x6809;
goto LOAD_NRO_END;
}
if (nro->text_offset != 0 || nro->text_offset + nro->text_size != nro->ro_offset || nro->ro_offset + nro->ro_size != nro->rw_offset || nro->rw_offset + nro->rw_size != nro->nro_size) {
rc = 0x6809;
goto LOAD_NRO_END;
}
sha256_init(&sha_ctx);
sha256_update(&sha_ctx, (u8 *)nro, nro->nro_size);
sha256_finalize(&sha_ctx);
sha256_finish(&sha_ctx, nro_hash);
if (!Registration::IsNroHashPresent(target_proc->index, nro_hash)) {
rc = 0x6C09;
goto LOAD_NRO_END;
}
if (Registration::IsNroAlreadyLoaded(target_proc->index, nro_hash)) {
rc = 0x7209;
goto LOAD_NRO_END;
}
if (R_FAILED((rc = svcSetProcessMemoryPermission(process_h, mcm_nro.code_memory_address, nro->text_size, 5)))) {
goto LOAD_NRO_END;
}
if (R_FAILED((rc = svcSetProcessMemoryPermission(process_h, mcm_nro.code_memory_address + nro->ro_offset, nro->ro_size, 1)))) {
goto LOAD_NRO_END;
}
if (R_FAILED((rc = svcSetProcessMemoryPermission(process_h, mcm_nro.code_memory_address + nro->rw_offset, nro->rw_size + nro->bss_size, 3)))) {
goto LOAD_NRO_END;
}
Registration::AddNroToProcess(target_proc->index, &mcm_nro, &mcm_bss, nro->text_size, nro->ro_size, nro->rw_size, nro->build_id);
*out_address = mcm_nro.code_memory_address;
mcm_nro.Unmap();
mcm_bss.Unmap();
rc = 0x0;
LOAD_NRO_END:
if (R_FAILED(rc)) {
mcm_nro.Close();
mcm_bss.Close();
}
return 0x0;
}