[vm] Fix Fuchsia RISC-V build.

TEST=local build
Change-Id: If21f38e98d76c962519434504dfc5003332831ac
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/464783
Reviewed-by: Alexander Aprelev <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: rmacnak-google

runtime/vm/compiler/backend/il_riscv.cc

@@ -1703,7 +1703,11 @@ void NativeEntryInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 
   __ PushNativeCalleeSavedRegisters();
 
-#if defined(USING_SHADOW_CALL_STACK)
+#if defined(DART_TARGET_OS_FUCHSIA) || defined(DART_TARGET_OS_ANDROID)
+  __ sx(GP,
+        compiler::Address(
+            THR, compiler::target::Thread::saved_shadow_call_stack_offset()));
+#elif defined(USING_SHADOW_CALL_STACK)
 #error Unimplemented
 #endif
 

runtime/vm/compiler/stub_code_compiler_riscv.cc

@@ -486,7 +486,7 @@ void StubCodeCompiler::GenerateFfiCallbackTrampolineStub() {
 #if defined(DART_TARGET_OS_FUCHSIA)
     // TODO(https://dartbug.com/52579): Remove.
     if (FLAG_precompiled_mode) {
-      GenerateLoadBSSEntry(BSS::Relocation::DRT_ExitIsolateGroupBoundIsolate,
+      GenerateLoadBSSEntry(BSS::Relocation::DLRT_ExitIsolateGroupBoundIsolate,
                            T1, T2);
     } else {
       const intptr_t kPCRelativeLoadOffset = 12;

runtime/vm/os_fuchsia.cc

@@ -464,14 +464,10 @@ int64_t OS::GetCurrentMonotonicMicrosForTimeline() {
 #endif
 }
 
-// TODO(5411554):  May need to hoist these architecture dependent code
-// into a architecture specific file e.g: os_ia32_fuchsia.cc
 intptr_t OS::ActivationFrameAlignment() {
-#if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64) ||                   \
-    defined(TARGET_ARCH_ARM64)
+#if defined(TARGET_ARCH_X64) || defined(TARGET_ARCH_ARM64) ||                  \
+    defined(TARGET_ARCH_RISCV64)
   const int kMinimumAlignment = 16;
-#elif defined(TARGET_ARCH_ARM)
-  const int kMinimumAlignment = 8;
 #else
 #error Unsupported architecture.
 #endif

runtime/vm/thread_interrupter_fuchsia.cc

@@ -92,10 +92,10 @@ class ThreadInterrupterFuchsia : public AllStatic {
     state->lr = static_cast<uintptr_t>(regs.lr);
 #elif defined(TARGET_ARCH_RISCV64)
     state->pc = static_cast<uintptr_t>(regs.pc);
-    state->fp = static_cast<uintptr_t>(regs.r[FPREG]);
-    state->csp = static_cast<uintptr_t>(regs.r[SPREG]);
-    state->dsp = static_cast<uintptr_t>(regs.r[SPREG]);
-    state->lr = static_cast<uintptr_t>(regs.r[LINK_REGISTER]);
+    state->fp = static_cast<uintptr_t>(regs.s0);
+    state->csp = static_cast<uintptr_t>(regs.sp);
+    state->dsp = static_cast<uintptr_t>(regs.sp);
+    state->lr = static_cast<uintptr_t>(regs.ra);
 #else
 #error "Unsupported architecture"
 #endif