start working on tests

+ Current setup will likely not last long, just a stopgap until I figure
  out how I want to build each testcase etc.

  Probably dir based, but I'll probably add some scripts that generate
  the build rules for each test case (or binary?). Also, should probably
  put ouput files in a build directory and keep the source clean, but
  again, good enough for now.

  Will have to start implementing more extensive tests, and probably
  come up with some way to compare textual output etc.

1 files changed, 50 insertions, 0 deletions

diff --git a/tests/common/arch/riscv64/syscall.h b/tests/common/arch/riscv64/syscall.h
new file mode 100644
index 0000000..aafda82
--- /dev/null
+++ b/tests/common/arch/riscv64/syscall.h
@@ -0,0 +1,50 @@
+#ifndef KMI_TESTS_ARCH_RISCV64_SYSCALL_H
+#define KMI_TESTS_ARCH_RISCV64_SYSCALL_H
+
+#include <kmi/syscalls.h>
+#include <kmi/attrs.h>
+
+static inline struct sys_ret syscall(size_t n,
+                                     long arg0, long arg1, long arg2, long arg3,
+                                     long arg4,
+                                     long arg5)
+{
+        register long a0 __asm__ ("a0") = arg0;
+        register long a1 __asm__ ("a1") = arg1;
+        register long a2 __asm__ ("a2") = arg2;
+        register long a3 __asm__ ("a3") = arg3;
+        register long a4 __asm__ ("a4") = arg4;
+        register long a5 __asm__ ("a5") = arg5;
+
+#define OUTPUTS "+r" (a0), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4), "=r" (a5)
+
+        if (n == 1)
+                __asm__ volatile ("ecall" : OUTPUTS : "r" (a0));
+
+        else if (n == 2)
+                __asm__ volatile ("ecall" : OUTPUTS : "r" (a0), "r" (a1));
+
+        else if (n == 3)
+                __asm__ volatile ("ecall" : OUTPUTS : "r" (a0), "r" (a1),
+                                  "r" (a2));
+
+        else if (n == 4)
+                __asm__ volatile ("ecall" : OUTPUTS
+                                  : "r" (a0), "r" (a1), "r" (a2), "r" (a3));
+
+        else if (n == 5)
+                __asm__ volatile ("ecall" : OUTPUTS
+                                  : "r" (a0), "r" (a1), "r" (a2), "r" (a3),
+                                  "r" (a4));
+
+        else if (n == 6)
+                __asm__ volatile ("ecall" : OUTPUTS
+                                  : "r" (a0), "r" (a1), "r" (a2), "r" (a3),
+                                  "r" (a4), "r" (a5));
+
+#undef OUTPUTS
+
+        return (struct sys_ret){a0, a1, a2, a3, a4, a5};
+}
+
+#endif /* KMI_TESTS_ARCH_RISCV64_SYSCALL_H */