[Qemu-devel] [PATCH 1/3] linux-user:Support for MIPS64 user mode emulation in QEMU

[khansa@kics.edu.pk]

From: Khansa Butt <khansa@kics.edu.pk>


Signed-off-by: Khansa Butt <khansa@kics.edu.pk>
---
 configure                             |    1 +
 default-configs/mips64-linux-user.mak |    1 +
 linux-user/main.c                     |   21 +++++++++++++++++++--
 linux-user/mips64/syscall.h           |    2 ++
 4 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 default-configs/mips64-linux-user.mak

diff --git a/configure b/configure
index ac4840d..e31229b 100755
--- a/configure
+++ b/configure
@@ -914,6 +914,7 @@ m68k-linux-user \
 microblaze-linux-user \
 microblazeel-linux-user \
 mips-linux-user \
+mips64-linux-user \
 mipsel-linux-user \
 ppc-linux-user \
 ppc64-linux-user \
diff --git a/default-configs/mips64-linux-user.mak b/default-configs/mips64-linux-user.mak
new file mode 100644
index 0000000..1598bfc
--- /dev/null
+++ b/default-configs/mips64-linux-user.mak
@@ -0,0 +1 @@
+# Default configuration for mips64-linux-user
diff --git a/linux-user/main.c b/linux-user/main.c
index d1bbc57..17a74cd 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2157,7 +2157,8 @@ static int do_store_exclusive(CPUMIPSState *env)
 void cpu_loop(CPUMIPSState *env)
 {
     target_siginfo_t info;
-    int trapnr, ret;
+    int trapnr;
+    abi_long ret;
     unsigned int syscall_num;
 
     for(;;) {
@@ -2166,8 +2167,23 @@ void cpu_loop(CPUMIPSState *env)
         cpu_exec_end(env);
         switch(trapnr) {
         case EXCP_SYSCALL:
-            syscall_num = env->active_tc.gpr[2] - 4000;
             env->active_tc.PC += 4;
+#if defined(TARGET_MIPS64)
+            syscall_num = env->active_tc.gpr[2] - 5000;
+            /* MIPS64 has eight argument registers so there is
+             * no need to get arguments from stack
+             */
+            ret = do_syscall(env, env->active_tc.gpr[2],
+                             env->active_tc.gpr[4],
+                             env->active_tc.gpr[5],
+                             env->active_tc.gpr[6],
+                             env->active_tc.gpr[7],
+                             env->active_tc.gpr[8],
+                             env->active_tc.gpr[9],
+                             env->active_tc.gpr[10],
+                             env->active_tc.gpr[11]);
+#else
+            syscall_num = env->active_tc.gpr[2] - 4000;
             if (syscall_num >= sizeof(mips_syscall_args)) {
                 ret = -TARGET_ENOSYS;
             } else {
@@ -2205,6 +2221,7 @@ void cpu_loop(CPUMIPSState *env)
                                  env->active_tc.gpr[7],
                                  arg5, arg6, arg7, arg8);
             }
+#endif
 done_syscall:
             if (ret == -TARGET_QEMU_ESIGRETURN) {
                 /* Returning from a successful sigreturn syscall.
diff --git a/linux-user/mips64/syscall.h b/linux-user/mips64/syscall.h
index 668a2b9..96f03da 100644
--- a/linux-user/mips64/syscall.h
+++ b/linux-user/mips64/syscall.h
@@ -218,4 +218,6 @@ struct target_pt_regs {
 
 
 
+#define TARGET_QEMU_ESIGRETURN 255
+
 #define UNAME_MACHINE "mips64"
-- 
1.7.3.4