1 files changed, 44 insertions, 20 deletions

diff --git a/arch/um/include/sysdep-i386/stub.h b/arch/um/include/sysdep-i386/stub.h
index d3699fe1c613..a49ceb199ee5 100644
--- a/arch/um/include/sysdep-i386/stub.h
+++ b/arch/um/include/sysdep-i386/stub.h
@@ -16,45 +16,69 @@ extern void stub_clone_handler(void);
 #define STUB_MMAP_NR __NR_mmap2
 #define MMAP_OFFSET(o) ((o) >> PAGE_SHIFT)
 
+static inline long stub_syscall1(long syscall, long arg1)
+{
+        long ret;
+
+        __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1));
+
+        return ret;
+}
+
 static inline long stub_syscall2(long syscall, long arg1, long arg2)
 {
         long ret;
 
-        __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx");
-        __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx");
-        __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax");
-        __asm__("int $0x80;" : : : "%eax");
-        __asm__ __volatile__("movl %%eax, %0; " : "=g" (ret) :);
-        return(ret);
+        __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
+                        "c" (arg2));
+
+        return ret;
 }
 
 static inline long stub_syscall3(long syscall, long arg1, long arg2, long arg3)
 {
-        __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx");
-        return(stub_syscall2(syscall, arg1, arg2));
+        long ret;
+
+        __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
+                        "c" (arg2), "d" (arg3));
+
+        return ret;
 }
 
 static inline long stub_syscall4(long syscall, long arg1, long arg2, long arg3,
                                  long arg4)
 {
-        __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi");
-        return(stub_syscall3(syscall, arg1, arg2, arg3));
+        long ret;
+
+        __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
+                        "c" (arg2), "d" (arg3), "S" (arg4));
+
+        return ret;
+}
+
+static inline long stub_syscall5(long syscall, long arg1, long arg2, long arg3,
+                                 long arg4, long arg5)
+{
+        long ret;
+
+        __asm__ volatile ("int $0x80" : "=a" (ret) : "0" (syscall), "b" (arg1),
+                        "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5));
+
+        return ret;
 }
 
 static inline long stub_syscall6(long syscall, long arg1, long arg2, long arg3,
                                  long arg4, long arg5, long arg6)
 {
         long ret;
-        __asm__("movl %0, %%eax; " : : "g" (syscall) : "%eax");
-        __asm__("movl %0, %%ebx; " : : "g" (arg1) : "%ebx");
-        __asm__("movl %0, %%ecx; " : : "g" (arg2) : "%ecx");
-        __asm__("movl %0, %%edx; " : : "g" (arg3) : "%edx");
-        __asm__("movl %0, %%esi; " : : "g" (arg4) : "%esi");
-        __asm__("movl %0, %%edi; " : : "g" (arg5) : "%edi");
-        __asm__ __volatile__("pushl %%ebp ; movl %1, %%ebp; "
-                "int $0x80; popl %%ebp ; "
-                "movl %%eax, %0; " : "=g" (ret) : "g" (arg6) : "%eax");
-        return(ret);
+
+        __asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; "
+                        "int $0x80 ; pop %%ebp"
+                        : "=a" (ret)
+                        : "g" (syscall), "b" (arg1), "c" (arg2), "d" (arg3),
+                          "S" (arg4), "D" (arg5), "0" (arg6));
+
+        return ret;
 }
 
 static inline void trap_myself(void)