Merge pull request #3574 from jasonKercher/i386-syscall6

fix 6 argument syscall on i386

src/llvm_backend_proc.cpp

@@ -2835,8 +2835,7 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
 				{
 					GB_ASSERT(arg_count <= 7);
 
-					char asm_string_default[] = "int $$0x80";
-					char *asm_string = asm_string_default;
+					char asm_string[] = "int $$0x80";
 					gbString constraints = gb_string_make(heap_allocator(), "={eax}");
 
 					for (unsigned i = 0; i < gb_min(arg_count, 6); i++) {
@@ -2848,16 +2847,11 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
 							"edx",
 							"esi",
 							"edi",
+							"ebp",
 						};
 						constraints = gb_string_appendc(constraints, regs[i]);
 						constraints = gb_string_appendc(constraints, "}");
 					}
-					if (arg_count == 7) {
-						char asm_string7[] = "push %[arg6]\npush %%ebp\nmov 4(%%esp), %%ebp\nint $0x80\npop %%ebp\nadd $4, %%esp";
-						asm_string = asm_string7;
-
-						constraints = gb_string_appendc(constraints, ",rm");
-					}
 
 					inline_asm = llvm_get_inline_asm(func_type, make_string_c(asm_string), make_string_c(constraints));
 				}