[core/arm] more verbose backtrace showing ALL of the thread's context state (#2924)

Should make backtraces infinitely better :)

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2924
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/core/arm/arm_interface.cpp

@@ -14,11 +14,33 @@ namespace Core {
 void ArmInterface::LogBacktrace(Kernel::KProcess* process) const {
     Kernel::Svc::ThreadContext ctx;
     this->GetContext(ctx);
-    LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", ctx.sp, ctx.pc);
-    LOG_ERROR(Core_ARM, "{:20}{:20}{:20}{:20}{}", "Module Name", "Address", "Original Address", "Offset", "Symbol");
+
+    std::array<u64, 32> xreg{
+        ctx.r[0], ctx.r[1], ctx.r[2], ctx.r[3],
+        ctx.r[4], ctx.r[5], ctx.r[6], ctx.r[7],
+        ctx.r[8], ctx.r[9], ctx.r[10], ctx.r[11],
+        ctx.r[12], ctx.r[13], ctx.r[14], ctx.r[15],
+        ctx.r[16], ctx.r[17], ctx.r[18], ctx.r[19],
+        ctx.r[20], ctx.r[21], ctx.r[22], ctx.r[23],
+        ctx.r[24], ctx.r[25], ctx.r[26], ctx.r[27],
+        ctx.r[28], ctx.fp, ctx.lr, ctx.sp,
+    };
+
+    std::string msg = fmt::format("Backtrace @ PC={:016X}\n", ctx.pc);
+    for (size_t i = 0; i < 32; i += 4)
+        msg += fmt::format("R{:02}={:016X} R{:02}={:016X} R{:02}={:016X} R{:02}={:016X}\n",
+            i + 0, xreg[i + 0], i + 1, xreg[i + 1],
+            i + 2, xreg[i + 2], i + 3, xreg[i + 3]);
+    for (size_t i = 0; i < 32; i += 2)
+        msg += fmt::format("V{:02}={:016X}_{:016X} V{:02}={:016X}_{:016X}\n",
+            i + 0, ctx.v[i + 0][0], ctx.v[i + 0][1],
+            i + 1, ctx.v[i + 1][0], ctx.v[i + 1][1]);
+    msg += fmt::format("PSTATE={:08X} FPCR={:08X} FPSR={:08X} TPIDR={:016X}\n", ctx.pstate, ctx.fpcr, ctx.fpsr, ctx.tpidr);
+    msg += fmt::format("{:20}{:20}{:20}{:20}{}\n", "Module", "Address", "Original Address", "Offset", "Symbol");
     auto const backtrace = GetBacktraceFromContext(process, ctx);
     for (auto const& entry : backtrace)
-        LOG_ERROR(Core_ARM, "{:20}{:016X}    {:016X}    {:016X}    {}", entry.module, entry.address, entry.original_address, entry.offset, entry.name);
+        msg += fmt::format("{:20}{:016X}    {:016X}    {:016X}    {}\n", entry.module, entry.address, entry.original_address, entry.offset, entry.name);
+    LOG_ERROR(Core_ARM, "{}", msg);
 }
 
 const Kernel::DebugWatchpoint* ArmInterface::MatchingWatchpoint(