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aarch64 - Support for apple exceptions

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kd-11 2024-08-24 02:09:22 +03:00 committed by kd-11
parent 4da30e9eca
commit 470f8674df
3 changed files with 24 additions and 2 deletions
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4
Utilities/Thread.cpp
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@ -1932,9 +1932,8 @@ static void signal_handler(int /*sig*/, siginfo_t* info, void* uct) noexcept
const bool is_writing = err & 0x2;
#elif defined(ARCH_ARM64)
const bool is_executing = uptr(info->si_addr) == uptr(RIP(context));
const u32 insn = is_executing ? 0 : *reinterpret_cast<u32*>(RIP(context));
#ifdef __linux__
#if defined(__linux__) || defined(__APPLE__)
// Current CPU state decoder is reverse-engineered from the linux kernel and may not work on other platforms.
const auto decoded_reason = aarch64::decode_fault_reason(context);
const bool is_writing = (decoded_reason == aarch64::fault_reason::data_write);
@ -1947,6 +1946,7 @@ static void signal_handler(int /*sig*/, siginfo_t* info, void* uct) noexcept
}
#else
const u32 insn = is_executing ? 0 : *reinterpret_cast<u32*>(RIP(context));
const bool is_writing =
(insn & 0xbfff0000) == 0x0c000000 || // STR <Wt>, [<Xn>, #<imm>] (store word with immediate offset)
(insn & 0xbfe00000) == 0x0c800000 || // STP <Wt1>, <Wt2>, [<Xn>, #<imm>] (store pair of registers with immediate offset)

7
rpcs3/Emu/CPU/Backends/AArch64/AArch64Signal.cpp
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@ -53,6 +53,13 @@ namespace aarch64
auto esr_ctx = find_EL1_esr_context(uctx);
return esr_ctx ? esr_ctx->esr : 0;
}
#elif defined(__APPLE__)
u64 _read_ESR_EL1(const ucontext_t* uctx)
{
// Easy to read from mcontext
const auto darwin_ctx = reinterpret_cast<aarch64_darwin_mcontext64*>(uctx->uc_mcontext);
return darwin_ctx->es.ESR;
}
#else
u64 _read_ESR_EL1(const ucontext_t*)
{

15
rpcs3/Emu/CPU/Backends/AArch64/AArch64Signal.h
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@ -8,6 +8,7 @@ namespace aarch64
// Some renamed kernel definitions, we don't need to include kernel headers directly
#pragma pack(push, 1)
#if defined(__linux__)
struct aarch64_cpu_ctx_block
{
u32 magic;
@ -19,6 +20,20 @@ namespace aarch64
aarch64_cpu_ctx_block head;
u64 esr; // Exception syndrome register
};
#elif defined(__APPLE__)
struct aarch64_exception_state
{
u64 FAR; // Fault address reg
u32 ESR; // Exception syndrome reg (ESR_EL1)
u32 exception_id;
};
struct aarch64_darwin_mcontext64
{
aarch64_exception_state es;
// Other states we don't care about follow this field
};
#endif
#pragma pack(pop)