rpcrt4: Implement calling server functions on x86_64.

dlls/rpcrt4/ndr_stubless.c

@@ -1003,6 +1003,48 @@ __ASM_GLOBAL_FUNC(call_server_func,
     __ASM_CFI(".cfi_def_cfa %esp,4\n\t")
     __ASM_CFI(".cfi_same_value %ebp\n\t")
     "ret" )
+#elif defined __x86_64__
+LONG_PTR __cdecl call_server_func(SERVER_ROUTINE func, unsigned char * args, unsigned int stack_size);
+__ASM_GLOBAL_FUNC( call_server_func,
+                   "pushq %rbp\n\t"
+                   __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
+                   __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
+                   "movq %rsp,%rbp\n\t"
+                   __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
+                   "pushq %rsi\n\t"
+                   __ASM_CFI(".cfi_rel_offset %rsi,-8\n\t")
+                   "pushq %rdi\n\t"
+                   __ASM_CFI(".cfi_rel_offset %rdi,-16\n\t")
+                   "movq %rcx,%rax\n\t"   /* function to call */
+                   "movq $32,%rcx\n\t"    /* allocate max(32,stack_size) bytes of stack space */
+                   "cmpq %rcx,%r8\n\t"
+                   "cmovgq %r8,%rcx\n\t"
+                   "subq %rcx,%rsp\n\t"
+                   "andq $~15,%rsp\n\t"
+                   "movq %r8,%rcx\n\t"
+                   "shrq $3,%rcx\n\t"
+                   "movq %rsp,%rdi\n\t"
+                   "movq %rdx,%rsi\n\t"
+                   "rep; movsq\n\t"       /* copy arguments */
+                   "movq 0(%rsp),%rcx\n\t"
+                   "movq 8(%rsp),%rdx\n\t"
+                   "movq 16(%rsp),%r8\n\t"
+                   "movq 24(%rsp),%r9\n\t"
+                   "movq %rcx,%xmm0\n\t"
+                   "movq %rdx,%xmm1\n\t"
+                   "movq %r8,%xmm2\n\t"
+                   "movq %r9,%xmm3\n\t"
+                   "callq *%rax\n\t"
+                   "leaq -16(%rbp),%rsp\n\t"  /* restore stack */
+                   "popq %rdi\n\t"
+                   __ASM_CFI(".cfi_same_value %rdi\n\t")
+                   "popq %rsi\n\t"
+                   __ASM_CFI(".cfi_same_value %rsi\n\t")
+                   __ASM_CFI(".cfi_def_cfa_register %rsp\n\t")
+                   "popq %rbp\n\t"
+                   __ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
+                   __ASM_CFI(".cfi_same_value %rbp\n\t")
+                   "ret")
 #else
 #warning call_server_func not implemented for your architecture
 LONG_PTR __cdecl call_server_func(SERVER_ROUTINE func, unsigned char * args, unsigned short stack_size)