mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-05 19:51:45 +00:00
Loader: Greatly simplify mapping logic, add CodeMemory mapper.
This commit is contained in:
Michael Scire
parent
991357f309
commit
b34b9ba0e4
2 changed files with 150 additions and 110 deletions
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@ -1,6 +1,7 @@
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#include <switch.h>
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#include "ldr_map.hpp"
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#include "ldr_random.hpp"
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Result MapUtils::LocateSpaceForMap(u64 *out, u64 out_size) {
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if (kernelAbove200()) {
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@ -11,38 +12,26 @@ Result MapUtils::LocateSpaceForMap(u64 *out, u64 out_size) {
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}
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Result MapUtils::MapCodeMemoryForProcess(Handle process_h, bool is_64_bit_address_space, u64 base_address, u64 size, u64 *out_code_memory_address) {
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if (kernelAbove200()) {
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return MapCodeMemoryForProcessModern(process_h, base_address, size, out_code_memory_address);
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} else {
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return MapCodeMemoryForProcessDeprecated(process_h, is_64_bit_address_space, base_address, size, out_code_memory_address);
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}
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}
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Result MapUtils::LocateSpaceForMapModern(u64 *out, u64 out_size) {
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MemoryInfo mem_info = {0};
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AddressSpaceInfo address_space = {0};
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u32 page_info = 0;
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u64 heap_base = 0, heap_size = 0, heap_end = 0;
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u64 map_base = 0, map_size = 0, map_end = 0;
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u64 addspace_base = 0, addspace_size = 0, addspace_end = 0;
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u64 cur_base = 0, cur_end = 0;
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Result rc;
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if (R_FAILED((rc = svcGetInfo(&heap_base, 4, CUR_PROCESS_HANDLE, 0)))) {
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if (R_FAILED((rc = GetAddressSpaceInfo(&address_space, CUR_PROCESS_HANDLE)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&heap_size, 5, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&map_base, 2, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&map_size, 3, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&addspace_base, 12, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&addspace_size, 13, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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heap_end = heap_base + heap_size;
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map_end = map_base + map_size;
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addspace_end = addspace_base + addspace_size;
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cur_base = addspace_base;
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cur_base = address_space.addspace_base;
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rc = 0xD001;
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cur_end = cur_base + out_size;
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@ -50,11 +39,20 @@ Result MapUtils::LocateSpaceForMapModern(u64 *out, u64 out_size) {
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return rc;
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}
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if (heap_size) {
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if (map_size) {
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while (true) {
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if (cur_end - 1 < heap_base || heap_end - 1 < cur_base) {
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if (cur_end - 1 < map_base || map_end - 1 < cur_base) {
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if (address_space.heap_size && (address_space.heap_base <= cur_end - 1 && cur_base <= address_space.heap_end - 1)) {
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/* If we overlap the heap region, go to the end of the heap region. */
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if (cur_base == address_space.heap_end) {
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return rc;
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}
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cur_base = address_space.heap_end;
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} else if (address_space.map_size && (address_space.map_base <= cur_end - 1 && cur_base <= address_space.map_end - 1)) {
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/* If we overlap the map region, go to the end of the map region. */
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if (cur_base == address_space.map_end) {
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return rc;
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}
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cur_base = address_space.map_end;
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} else {
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if (R_FAILED(svcQueryMemory(&mem_info, &page_info, cur_base))) {
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/* TODO: panic. */
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}
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@ -66,82 +64,15 @@ Result MapUtils::LocateSpaceForMapModern(u64 *out, u64 out_size) {
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return rc;
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}
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cur_base = mem_info.addr + mem_info.size;
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if (cur_base >= addspace_end) {
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if (cur_base >= address_space.addspace_end) {
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return rc;
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}
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} else {
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if (map_end == cur_base) {
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return rc;
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}
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cur_base = map_end;
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}
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} else {
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if (heap_end == cur_base) {
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return rc;
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}
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cur_base = heap_end;
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}
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cur_end = cur_base + out_size;
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if (cur_base + out_size <= cur_base) {
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return rc;
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}
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}
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} else {
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while (true) {
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if (cur_end - 1 < heap_base || heap_end - 1 < cur_base) {
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if (R_FAILED(svcQueryMemory(&mem_info, &page_info, cur_base))) {
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/* TODO: panic. */
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}
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if (mem_info.type == 0 && mem_info.addr - cur_base + mem_info.size >= out_size) {
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*out = cur_base;
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return 0x0;
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}
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if (mem_info.addr + mem_info.size <= cur_base) {
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return rc;
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}
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cur_base = mem_info.addr + mem_info.size;
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if (cur_base >= addspace_end) {
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return rc;
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}
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} else {
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if (heap_end == cur_base) {
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return rc;
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}
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cur_base = heap_end;
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}
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cur_end = cur_base + out_size;
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if (cur_base + out_size <= cur_base) {
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return rc;
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}
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}
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}
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} else {
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while (cur_end > cur_base) {
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if (map_size && cur_end - 1 >= map_base && map_end - 1 >= cur_base) {
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if (cur_base == map_end) {
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return rc;
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}
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cur_base = map_end;
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} else {
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if (R_FAILED(svcQueryMemory(&mem_info, &page_info, cur_base))) {
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/* TODO: panic. */
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}
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if (mem_info.type == 0 && mem_info.addr - cur_base + mem_info.size >= out_size) {
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*out = cur_base;
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return 0x0;
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}
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if (mem_info.addr + mem_info.size <= cur_base) {
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return rc;
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}
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cur_base = mem_info.addr + mem_info.size;
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if (cur_base >= addspace_end) {
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return rc;
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}
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}
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cur_end = cur_base + out_size;
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}
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}
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return rc;
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}
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@ -178,3 +109,93 @@ Result MapUtils::LocateSpaceForMapDeprecated(u64 *out, u64 out_size) {
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}
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return rc;
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}
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Result MapUtils::MapCodeMemoryForProcessModern(Handle process_h, u64 base_address, u64 size, u64 *out_code_memory_address) {
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AddressSpaceInfo address_space = {0};
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Result rc;
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if (R_FAILED((rc = GetAddressSpaceInfo(&address_space, CUR_PROCESS_HANDLE)))) {
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return rc;
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}
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if (size > address_space.addspace_size) {
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return 0x6609;
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}
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u64 try_address;
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for (unsigned int i = 0; i < 0x200; i++) {
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while (true) {
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try_address = address_space.addspace_base + (RandomUtils::GetRandomU64((u64)(address_space.addspace_size - size) >> 12) << 12);
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if (address_space.heap_size && (address_space.heap_base <= try_address + size - 1 && try_address <= address_space.heap_end - 1)) {
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continue;
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}
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if (address_space.map_size && (address_space.map_base <= try_address + size - 1 && try_address <= address_space.map_end - 1)) {
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continue;
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}
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break;
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}
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rc = svcMapProcessCodeMemory(process_h, try_address, base_address, size);
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if (rc != 0xD401) {
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break;
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}
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}
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if (R_SUCCEEDED(rc)) {
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*out_code_memory_address = try_address;
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}
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return rc;
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}
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Result MapUtils::MapCodeMemoryForProcessDeprecated(Handle process_h, bool is_64_bit_address_space, u64 base_address, u64 size, u64 *out_code_memory_address) {
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Result rc;
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u64 addspace_base, addspace_size;
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if (is_64_bit_address_space) {
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addspace_base = 0x8000000ULL;
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addspace_size = 0x78000000ULL;
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} else {
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addspace_base = 0x200000ULL;
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addspace_size = 0x3FE0000ULL;
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}
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if (size > addspace_size) {
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return 0x6609;
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}
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u64 try_address;
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for (unsigned int i = 0; i < 0x200; i++) {
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try_address = addspace_base + (RandomUtils::GetRandomU64((u64)(addspace_size - size) >> 12) << 12);
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rc = svcMapProcessCodeMemory(process_h, try_address, base_address, size);
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if (rc != 0xD401) {
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break;
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}
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}
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if (R_SUCCEEDED(rc)) {
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*out_code_memory_address = try_address;
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}
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return rc;
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}
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Result MapUtils::GetAddressSpaceInfo(AddressSpaceInfo *out, Handle process_h) {
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Result rc;
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if (R_FAILED((rc = svcGetInfo(&out->heap_base, 4, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&out->heap_size, 5, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&out->map_base, 2, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&out->map_size, 3, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&out->addspace_base, 12, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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if (R_FAILED((rc = svcGetInfo(&out->addspace_size, 13, CUR_PROCESS_HANDLE, 0)))) {
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return rc;
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}
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out->heap_end = out->heap_base + out->heap_size;
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out->map_end = out->map_base + out->map_size;
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out->addspace_end = out->addspace_base + out->addspace_size;
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return 0;
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}
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@ -1,9 +1,28 @@
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#pragma once
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#include <switch.h>
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#include "ldr_registration.hpp"
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class MapUtils {
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public:
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struct AddressSpaceInfo {
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u64 heap_base;
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u64 heap_size;
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u64 heap_end;
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u64 map_base;
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u64 map_size;
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u64 map_end;
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u64 addspace_base;
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u64 addspace_size;
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u64 addspace_end;
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};
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static Result GetAddressSpaceInfo(AddressSpaceInfo *out, Handle process_h);
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static Result LocateSpaceForMapDeprecated(u64 *out, u64 out_size);
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static Result LocateSpaceForMapModern(u64 *out, u64 out_size);
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static Result LocateSpaceForMap(u64 *out, u64 out_size);
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static Result MapCodeMemoryForProcessDeprecated(Handle process_h, bool is_64_bit_address_space, u64 base_address, u64 size, u64 *out_code_memory_address);
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static Result MapCodeMemoryForProcessModern(Handle process_h, u64 base_address, u64 size, u64 *out_code_memory_address);
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static Result MapCodeMemoryForProcess(Handle process_h, bool is_64_bit_address_space, u64 base_address, u64 size, u64 *out_code_memory_address);
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};
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