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Only apply SM close bug workaround to very old apps (use absence of MOD0 as heuristic)

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This commit is contained in:
fincs 2018-12-06 02:18:50 +01:00
parent 96af83a70e
commit 0556fbbd99
1 changed files with 19 additions and 2 deletions
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21
source/main.c
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@ -16,6 +16,7 @@ static bool g_isApplication = 0;
static NsApplicationControlData g_applicationControlData;
static bool g_isAutomaticGameplayRecording = 0;
static bool g_smCloseWorkaround = false;
static u8 g_savedTls[0x100];
@ -220,8 +221,13 @@ void loadNro(void)
size_t rw_size=0;
Result rc=0;
svcSleepThread(1000000000);//Wait for sm-sysmodule to handle closing the sm session from this process. Without this delay smInitialize will fail once eventually used later.
//TODO: Lower the above delay-value?
if (g_smCloseWorkaround) {
// For old applications, wait for SM to handle closing the SM session from this process.
// If we don't do this, smInitialize will fail once eventually used later.
// This is caused by a bug in old versions of libnx that was fixed in commit 68a77ac950.
g_smCloseWorkaround = false;
svcSleepThread(1000000000);
}
memcpy((u8*)armGetTls() + 0x100, g_savedTls, 0x100);
@ -298,6 +304,10 @@ void loadNro(void)
rw_size = header->segments[2].size + header->bss_size;
rw_size = (rw_size+0xFFF) & ~0xFFF;
bool has_mod0 = false;
if (start->mod_offset > 0 && start->mod_offset <= (total_size-0x24)) // Validate MOD0 offset
has_mod0 = *(uint32_t*)(nrobuf + start->mod_offset) == 0x30444F4D; // Validate MOD0 header
int i;
for (i=0; i<3; i++)
{
@ -397,6 +407,13 @@ void loadNro(void)
memset(__stack_top - STACK_SIZE, 0, STACK_SIZE);
if (!has_mod0) {
// Apply sm-close workaround to NROs which do not contain a valid MOD0 header.
// This heuristic is based on the fact that MOD0 support was added very shortly after
// the fix for the sm-close bug (in fact, two commits later).
g_smCloseWorkaround = true;
}
extern NORETURN void nroEntrypointTrampoline(u64 entries_ptr, u64 handle, u64 entrypoint);
nroEntrypointTrampoline((u64) entries, -1, entrypoint);
}