mika/nx-hbloader
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Use new virtmem API for NRO ASLR

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fincs 2020-08-06 00:47:03 +02:00
parent a13d5e7af2
commit 5ce1d33b7d
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GPG Key ID: 62C7609ADA219C60
1 changed files with 10 additions and 14 deletions
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source/main.c
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@ -375,34 +375,32 @@ void loadNro(void)
memcpy(&g_nroHeader, header, sizeof(g_nroHeader));
header = &g_nroHeader;
u64 map_addr;
do {
map_addr = randomGet64() & 0xFFFFFF000ull;
rc = svcMapProcessCodeMemory(g_procHandle, map_addr, (u64)nrobuf, total_size);
} while (rc == 0xDC01 || rc == 0xD401);
// Map code memory to a new randomized address
virtmemLock();
void* map_addr = virtmemFindAslr(total_size, 0);
rc = svcMapProcessCodeMemory(g_procHandle, (u64)map_addr, (u64)nrobuf, total_size);
virtmemUnlock();
if (R_FAILED(rc))
fatalThrow(MAKERESULT(Module_HomebrewLoader, 18));
// .text
rc = svcSetProcessMemoryPermission(
g_procHandle, map_addr + header->segments[0].file_off, header->segments[0].size, Perm_R | Perm_X);
g_procHandle, (u64)map_addr + header->segments[0].file_off, header->segments[0].size, Perm_R | Perm_X);
if (R_FAILED(rc))
fatalThrow(MAKERESULT(Module_HomebrewLoader, 19));
// .rodata
rc = svcSetProcessMemoryPermission(
g_procHandle, map_addr + header->segments[1].file_off, header->segments[1].size, Perm_R);
g_procHandle, (u64)map_addr + header->segments[1].file_off, header->segments[1].size, Perm_R);
if (R_FAILED(rc))
fatalThrow(MAKERESULT(Module_HomebrewLoader, 20));
// .data + .bss
rc = svcSetProcessMemoryPermission(
g_procHandle, map_addr + header->segments[2].file_off, rw_size, Perm_Rw);
g_procHandle, (u64)map_addr + header->segments[2].file_off, rw_size, Perm_Rw);
if (R_FAILED(rc))
fatalThrow(MAKERESULT(Module_HomebrewLoader, 21));
@ -462,15 +460,13 @@ void loadNro(void)
// HosVersion
entries[10].Value[0] = hosversionGet();
u64 entrypoint = map_addr;
g_nroAddr = map_addr;
g_nroAddr = (u64)map_addr;
g_nroSize = nro_size;
memset(__stack_top - STACK_SIZE, 0, STACK_SIZE);
extern NORETURN void nroEntrypointTrampoline(u64 entries_ptr, u64 handle, u64 entrypoint);
nroEntrypointTrampoline((u64) entries, -1, entrypoint);
nroEntrypointTrampoline((u64) entries, -1, g_nroAddr);
}
int main(int argc, char **argv)