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kern/ldr: add support for --x executables

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This commit is contained in:
Michael Scire 2024-10-09 17:42:02 -07:00 • committed by SciresM
parent 2855b8ee35
commit ff38a32a9b
9 changed files with 54 additions and 40 deletions
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29
libraries/libmesosphere/source/arch/arm64/kern_exception_handlers.cpp
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@ -100,6 +100,8 @@ namespace ams::kern::arch::arm64 {
u32 insn_value = 0;
if (UserspaceAccess::CopyMemoryFromUser(std::addressof(insn_value), reinterpret_cast<u32 *>(context->pc), sizeof(insn_value))) {
insn = insn_value;
} else if (KTargetSystem::IsDebugMode() && (context->pc & 3) == 0 && UserspaceAccess::CopyMemoryFromUserSize32BitWithSupervisorAccess(std::addressof(insn_value), reinterpret_cast<u32 *>(context->pc))) {
insn = insn_value;
} else {
insn = 0;
}
@ -112,33 +114,6 @@ namespace ams::kern::arch::arm64 {
bool should_process_user_exception = KTargetSystem::IsUserExceptionHandlersEnabled();
const u64 ec = (esr >> 26) & 0x3F;
switch (ec) {
case EsrEc_Unknown:
case EsrEc_IllegalExecution:
case EsrEc_Svc32:
case EsrEc_Svc64:
case EsrEc_PcAlignmentFault:
case EsrEc_SpAlignmentFault:
case EsrEc_SErrorInterrupt:
case EsrEc_BreakPointEl0:
case EsrEc_SoftwareStepEl0:
case EsrEc_WatchPointEl0:
case EsrEc_BkptInstruction:
case EsrEc_BrkInstruction:
break;
default:
{
/* If the fault address's state is KMemoryState_Code and the user can't read the address, force processing exception. */
KMemoryInfo info;
ams::svc::PageInfo pi;
if (R_SUCCEEDED(cur_process.GetPageTable().QueryInfo(std::addressof(info), std::addressof(pi), far))) {
if (info.GetState() == KMemoryState_Code && ((info.GetPermission() & KMemoryPermission_UserRead) != KMemoryPermission_UserRead)) {
should_process_user_exception = true;
}
}
}
break;
}
/* In the event that we return from this exception, we want SPSR.SS set so that we advance an instruction if single-stepping. */
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)