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Code Issues Releases Activity

Loader: Finish Loader::CreateProcess().

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This commit is contained in:
Michael Scire 2018-04-24 06:52:13 -06:00
parent ba90d0f250
commit e443b625ec
2 changed files with 38 additions and 5 deletions
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41
stratosphere/loader/source/ldr_nso.cpp
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@ -1,6 +1,9 @@
#include <switch.h>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <picosha2.hpp>
#include "lz4.h"
#include "ldr_nso.hpp"
#include "ldr_map.hpp"
#include "ldr_random.hpp"
@ -180,9 +183,39 @@ Result NsoUtils::CalculateNsoLoadExtents(u32 addspace_type, u32 args_size, NsoLo
}
Result NsoUtils::LoadNsoSegment(unsigned int index, unsigned int segment, FILE *f_nso, u8 *map_base) {
/* TODO */
return 0xA09;
Result NsoUtils::LoadNsoSegment(unsigned int index, unsigned int segment, FILE *f_nso, u8 *map_base, u8 *map_end) {
bool is_compressed = ((g_nso_headers[index].flags >> segment) & 1) != 0;
bool check_hash = ((g_nso_headers[index].flags >> (segment + 3)) & 1) != 0;
size_t out_size = g_nso_headers[index].segments[segment].decomp_size;
size_t size = is_compressed ? g_nso_headers[index].compressed_sizes[segment] : out_size;
if (size > out_size) {
return 0xA09;
}
if ((u32)(size | out_size) >> 31) {
return 0xA09;
}
u8 *dst_addr = map_base + g_nso_headers[index].segments[segment].dst_offset;
u8 *load_addr = is_compressed ? map_end - size : dst_addr;
if (fread(load_addr, 1, size, f_nso) != size) {
return 0xA09;
}
if (is_compressed) {
if (LZ4_decompress_safe((char *)load_addr, (char *)dst_addr, size, out_size) != (int)out_size) {
return 0xA09;
}
}
if (check_hash) {
u8 hash[0x20] = {0};
picosha2::hash256(dst_addr, dst_addr + out_size, hash, hash + sizeof(hash));
if (std::memcmp(g_nso_headers[index].section_hashes[segment], hash, sizeof(hash))) {
return 0xA09;
}
}
return 0x0;
}
Result NsoUtils::LoadNsosIntoProcessMemory(Handle process_h, u64 title_id, NsoLoadExtents *extents, u8 *args, u32 args_size) {
@ -206,7 +239,7 @@ Result NsoUtils::LoadNsosIntoProcessMemory(Handle process_h, u64 title_id, NsoLo
return 0xA09;
}
for (unsigned int seg = 0; seg < 3; seg++) {
if (R_FAILED((rc = LoadNsoSegment(i, seg, f_nso, map_base)))) {
if (R_FAILED((rc = LoadNsoSegment(i, seg, f_nso, map_base, map_base + extents->nso_sizes[i])))) {
fclose(f_nso);
svcUnmapProcessMemory(map_base, process_h, extents->nso_addresses[i], extents->nso_sizes[i]);
return rc;

2
stratosphere/loader/source/ldr_nso.hpp
View file

@ -91,6 +91,6 @@ class NsoUtils {
static Result ValidateNsoLoadSet();
static Result CalculateNsoLoadExtents(u32 addspace_type, u32 args_size, NsoLoadExtents *extents);
static Result LoadNsoSegment(unsigned int index, unsigned int segment, FILE *f_nso, u8 *map_base);
static Result LoadNsoSegment(unsigned int index, unsigned int segment, FILE *f_nso, u8 *map_base, u8 *map_end);
static Result LoadNsosIntoProcessMemory(Handle process_h, u64 title_id, NsoLoadExtents *extents, u8 *args, u32 args_size);
};