src/runtime/funcall.c

   1 /* funcall0 -- funcall3: we can get by with just two sets of these:
   2  * for platforms where the control stack is the C-stack, and all others.
   3  */
   4
   5 /*
   6  * This software is part of the SBCL system. See the README file for
   7  * more information.
   8  *
   9  * This software is derived from the CMU CL system, which was
  10  * written at Carnegie Mellon University and released into the
  11  * public domain. The software is in the public domain and is
  12  * provided with absolutely no warranty. See the COPYING and CREDITS
  13  * files for more information.
  14  */
  15
  16 #include <stdio.h>
  17
  18 #include "sbcl.h"
  19 #include "runtime.h"
  20 #include "globals.h"
  21 #include "os.h"
  22 #include "interrupt.h"
  23
  24 /* This is implemented in assembly language and called from C: */
  25 extern lispobj call_into_lisp(lispobj fun, lispobj *args, int nargs)
  26 #ifdef LISP_FEATURE_X86_64
  27     __attribute__((sysv_abi))
  28 #endif
  29     ;
  30
  31 #ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
  32 /* These functions are an interface to the Lisp call-in facility.
  33  * Since this is C we can know nothing about the calling environment.
  34  * The control stack might be the C stack if called from the monitor
  35  * or the Lisp stack if called as a result of an interrupt or maybe
  36  * even a separate stack. The args are most likely on that stack but
  37  * could be in registers depending on what the compiler likes. So we
  38  * copy the args into a portable vector and let the assembly language
  39  * call-in function figure it out. */
  40
  41 lispobj
  42 funcall0(lispobj function)
  43 {
  44     lispobj *args = NULL;
  45
  46     FSHOW((stderr, "/entering funcall0(0x%lx)\n", (long)function));
  47     return call_into_lisp(function, args, 0);
  48 }
  49 lispobj
  50 funcall1(lispobj function, lispobj arg0)
  51 {
  52     lispobj args[1];
  53     args[0] = arg0;
  54     return call_into_lisp(function, args, 1);
  55 }
  56
  57 lispobj
  58 funcall2(lispobj function, lispobj arg0, lispobj arg1)
  59 {
  60     lispobj args[2];
  61     args[0] = arg0;
  62     args[1] = arg1;
  63     return call_into_lisp(function, args, 2);
  64 }
  65
  66 lispobj
  67 funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
  68 {
  69     lispobj args[3];
  70     args[0] = arg0;
  71     args[1] = arg1;
  72     args[2] = arg2;
  73     return call_into_lisp(function, args, 3);
  74 }
  75
  76 #else
  77
  78 lispobj
  79 funcall0(lispobj function)
  80 {
  81     lispobj **stack_pointer
  82         = &access_control_stack_pointer(arch_os_get_current_thread());
  83     lispobj *args = *stack_pointer;
  84
  85     return call_into_lisp(function, args, 0);
  86 }
  87
  88 lispobj
  89 funcall1(lispobj function, lispobj arg0)
  90 {
  91     lispobj **stack_pointer
  92         = &access_control_stack_pointer(arch_os_get_current_thread());
  93     lispobj *args = *stack_pointer;
  94
  95     *stack_pointer += 1;
  96     args[0] = arg0;
  97
  98     return call_into_lisp(function, args, 1);
  99 }
 100
 101 lispobj
 102 funcall2(lispobj function, lispobj arg0, lispobj arg1)
 103 {
 104     lispobj **stack_pointer
 105         = &access_control_stack_pointer(arch_os_get_current_thread());
 106     lispobj *args = *stack_pointer;
 107
 108     *stack_pointer += 2;
 109     args[0] = arg0;
 110     args[1] = arg1;
 111
 112     return call_into_lisp(function, args, 2);
 113 }
 114
 115 lispobj
 116 funcall3(lispobj function, lispobj arg0, lispobj arg1, lispobj arg2)
 117 {
 118     lispobj **stack_pointer
 119         = &access_control_stack_pointer(arch_os_get_current_thread());
 120     lispobj *args = *stack_pointer;
 121
 122     *stack_pointer += 3;
 123     args[0] = arg0;
 124     args[1] = arg1;
 125     args[2] = arg2;
 126
 127     return call_into_lisp(function, args, 3);
 128 }
 129 #endif