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https://github.com/boykopovar/AnyPS5.git
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mugurc
0ae0bbf244
Guest C built with -fexceptions binds __gcc_personality_v0 to __gcc_personality_v0_nid_postfix, and the unwinder recognizes the frame by that address. exception_c_cleanup links the host personality, so it passed without the export. The new test builds a call-site table by hand and drives the routine the way the unwinder does: through the _nid_postfix symbol and through CallPersonality. It covers the cleanup phase installing the landing pad, the search phase continuing, ranges before and after the call site, a call site with no landing pad, no LSDA, a signal frame, an unsupported version, and an unknown personality. Without the export it fails to link.
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
#include "prx/libc/include/exceptions/Unwind.hpp"
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#include <cstdio>
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#include <cstdlib>
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namespace LibcUnwind {
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_Unwind_Reason_Code CallPersonality(Word personality, _Unwind_Action actions, _Unwind_Exception* exception, _Unwind_Context* context);
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}
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static void Require(bool value) { if (!value) std::abort(); }
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static const unsigned char cleanupTable[] = {0xff, 0xff, 0x01, 0x04, 0x10, 0x20, 0x40, 0x00};
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static const unsigned char noLandingTable[] = {0xff, 0xff, 0x01, 0x04, 0x10, 0x20, 0x00, 0x00};
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constexpr std::uintptr_t region = 0x10000;
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struct Frame {
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_Unwind_Context context {};
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_Unwind_Exception exception {};
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Frame(const unsigned char* table, std::uintptr_t resume, bool signalFrame = false) {
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context.region = region;
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context.lsda = reinterpret_cast<std::uintptr_t>(table);
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context.registers[16] = region + resume;
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context.signalFrame = signalFrame;
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}
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};
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static _Unwind_Reason_Code Direct(Frame& frame, _Unwind_Action actions, int version = 1) {
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return __gcc_personality_v0_nid_postfix(version, actions, 0, &frame.exception, &frame.context);
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}
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static _Unwind_Reason_Code Routed(Frame& frame, _Unwind_Action actions) {
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return LibcUnwind::CallPersonality(reinterpret_cast<std::uintptr_t>(__gcc_personality_v0_nid_postfix), actions, &frame.exception, &frame.context);
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}
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static void RequireInstalled(Frame& frame) {
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Require(frame.context.registers[0] == reinterpret_cast<std::uintptr_t>(&frame.exception));
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Require(frame.context.registers[1] == 0);
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Require(frame.context.registers[16] == region + 0x40);
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}
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int main() {
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{
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Frame frame(cleanupTable, 0x18);
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Require(Direct(frame, _UA_CLEANUP_PHASE) == _URC_INSTALL_CONTEXT);
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RequireInstalled(frame);
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}
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{
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Frame frame(cleanupTable, 0x18);
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Require(Routed(frame, _UA_CLEANUP_PHASE) == _URC_INSTALL_CONTEXT);
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RequireInstalled(frame);
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}
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{
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Frame frame(cleanupTable, 0x18);
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Require(Direct(frame, _UA_SEARCH_PHASE) == _URC_CONTINUE_UNWIND);
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Require(frame.context.registers[16] == region + 0x18);
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}
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{
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Frame frame(cleanupTable, 0x18);
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Require(Routed(frame, _UA_SEARCH_PHASE) == _URC_CONTINUE_UNWIND);
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}
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{
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Frame before(cleanupTable, 0x10);
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Require(Direct(before, _UA_CLEANUP_PHASE) == _URC_CONTINUE_UNWIND);
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Frame after(cleanupTable, 0x31);
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Require(Direct(after, _UA_CLEANUP_PHASE) == _URC_CONTINUE_UNWIND);
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}
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{
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Frame frame(cleanupTable, 0x10, true);
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Require(Direct(frame, _UA_CLEANUP_PHASE) == _URC_INSTALL_CONTEXT);
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RequireInstalled(frame);
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}
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{
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Frame frame(noLandingTable, 0x18);
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Require(Direct(frame, _UA_CLEANUP_PHASE) == _URC_CONTINUE_UNWIND);
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}
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{
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Frame frame(nullptr, 0x18);
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Require(Direct(frame, _UA_CLEANUP_PHASE) == _URC_CONTINUE_UNWIND);
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}
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{
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Frame frame(cleanupTable, 0x18);
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Require(Direct(frame, _UA_CLEANUP_PHASE, 2) == _URC_FATAL_PHASE1_ERROR);
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}
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{
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Frame frame(cleanupTable, 0x18);
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Require(LibcUnwind::CallPersonality(0x1000, _UA_SEARCH_PHASE, &frame.exception, &frame.context) == _URC_FATAL_PHASE1_ERROR);
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Require(LibcUnwind::CallPersonality(0x1000, _UA_CLEANUP_PHASE, &frame.exception, &frame.context) == _URC_FATAL_PHASE2_ERROR);
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}
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std::puts("exception personality tests passed");
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return 0;
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}
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