sim: Add a transitional syscall ABI which defers to Process.
This change adds a transitional ABI which just falls back to the
existing Process syscall arg getters. It should be phased out once each
ISA implements its own actual ABI.
Jira Issue: https://gem5.atlassian.net/browse/GEM5-187
Change-Id: Ic40bd924989f91de70bbce59fda888b79bbbfca4
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23190
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/sim/syscall_desc.hh b/src/sim/syscall_desc.hh
index e5adf8b..c34dc90 100644
--- a/src/sim/syscall_desc.hh
+++ b/src/sim/syscall_desc.hh
@@ -50,12 +50,12 @@
#include <string>
#include "base/types.hh"
+#include "cpu/thread_context.hh"
#include "sim/guest_abi.hh"
+#include "sim/process.hh"
#include "sim/syscall_return.hh"
-class Process;
class SyscallDesc;
-class ThreadContext;
SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
ThreadContext *tc);
@@ -154,4 +154,50 @@
using SyscallDesc::SyscallDesc;
};
+struct DefaultSyscallABI
+{
+ using Position = int;
+};
+
+namespace GuestABI
+{
+
+template <>
+struct Result<DefaultSyscallABI, SyscallReturn>
+{
+ static void
+ store(ThreadContext *tc, const SyscallReturn &ret)
+ {
+ auto *process = tc->getProcessPtr();
+ process->setSyscallReturn(tc, ret);
+ }
+};
+
+template <typename Arg>
+struct Argument<DefaultSyscallABI, Arg,
+ typename std::enable_if<std::is_integral<Arg>::value>::type>
+{
+ static Arg
+ get(ThreadContext *tc, DefaultSyscallABI::Position &position)
+ {
+ auto *process = tc->getProcessPtr();
+ return process->getSyscallArg(tc, position);
+ }
+};
+
+template <typename Arg>
+struct Argument<DefaultSyscallABI, Arg,
+ typename std::enable_if<std::is_pointer<Arg>::value>::type>
+{
+ static Arg
+ get(ThreadContext *tc, DefaultSyscallABI::Position &position)
+ {
+ auto *process = tc->getProcessPtr();
+ RegVal reg = process->getSyscallArg(tc, position);
+ return (Arg)(uintptr_t)(reg);
+ }
+};
+
+} // namespace GuestABI
+
#endif // __SIM_SYSCALL_DESC_HH__
