gcc/config/avr/driver-avr.c

   1 /* Subroutines for the gcc driver.
   2    Copyright (C) 2009-2013 Free Software Foundation, Inc.
   3    Contributed by Anatoly Sokolov <aesok@post.ru>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25
  26 /* Current architecture.  */
  27 const avr_arch_t *avr_current_arch = NULL;
  28
  29 /* Current device.  */
  30 const avr_mcu_t *avr_current_device = NULL;
  31
  32 /* Initialize avr_current_arch and avr_current_device variables.  */
  33
  34 static void
  35 avr_set_current_device (const char *name)
  36 {
  37
  38  if (NULL != avr_current_arch)
  39    return;
  40
  41   for (avr_current_device = avr_mcu_types; avr_current_device->name;
  42        avr_current_device++)
  43     {
  44       if (strcmp (avr_current_device->name, name) == 0)
  45         break;
  46     }
  47
  48   avr_current_arch = &avr_arch_types[avr_current_device->arch];
  49 }
  50
  51 /* Returns command line parameters to pass to as.  */
  52
  53 const char*
  54 avr_device_to_as (int argc, const char **argv)
  55 {
  56   if (0 == argc)
  57     return NULL;
  58
  59   avr_set_current_device (argv[0]);
  60
  61   return concat ("-mmcu=", avr_current_arch->arch_name,
  62                  avr_current_device->errata_skip ? "" : " -mno-skip-bug",
  63                  NULL);
  64 }
  65
  66 /* Returns command line parameters to pass to ld.  */
  67
  68 const char*
  69 avr_device_to_ld (int argc, const char **argv)
  70 {
  71   if (0 == argc)
  72     return NULL;
  73
  74   avr_set_current_device (argv[0]);
  75
  76   return concat ("-m ", avr_current_arch->arch_name, NULL);
  77 }
  78
  79 /* Returns command line parameters that describe start of date section.  */
  80
  81 const char *
  82 avr_device_to_data_start (int argc, const char **argv)
  83 {
  84   unsigned long data_section_start;
  85   char data_section_start_str[16];
  86
  87   if (0 == argc)
  88     return NULL;
  89
  90   avr_set_current_device (argv[0]);
  91
  92   if (avr_current_device->data_section_start
  93       == avr_current_arch->default_data_section_start)
  94     return NULL;
  95
  96   data_section_start = 0x800000 + avr_current_device->data_section_start;
  97
  98   snprintf (data_section_start_str, sizeof(data_section_start_str) - 1,
  99             "0x%lX", data_section_start);
 100
 101   return concat ("-Tdata ", data_section_start_str, NULL);
 102 }
 103
 104 /* Returns command line parameters that describe the device startfile.  */
 105
 106 const char *
 107 avr_device_to_startfiles (int argc, const char **argv)
 108 {
 109   if (0 == argc)
 110     return NULL;
 111
 112   avr_set_current_device (argv[0]);
 113
 114   return concat ("crt", avr_current_device->library_name, ".o%s", NULL);
 115 }
 116
 117 /* Returns command line parameters that describe the device library.  */
 118
 119 const char *
 120 avr_device_to_devicelib (int argc, const char **argv)
 121 {
 122   if (0 == argc)
 123     return NULL;
 124
 125   avr_set_current_device (argv[0]);
 126
 127   return concat ("-l", avr_current_device->library_name, NULL);
 128 }
 129
 130 const char*
 131 avr_device_to_sp8 (int argc, const char **argv)
 132 {
 133   if (0 == argc)
 134     return NULL;
 135
 136   avr_set_current_device (argv[0]);
 137
 138   /* Leave "avr2" and "avr25" alone.  These two architectures are
 139      the only ones that mix devices with 8-bit SP and 16-bit SP.
 140      -msp8 is set by mmultilib machinery.  */
 141
 142   if (avr_current_device->macro == NULL
 143       && (avr_current_device->arch == ARCH_AVR2
 144           || avr_current_device->arch == ARCH_AVR25))
 145     return "";
 146
 147   return avr_current_device->short_sp
 148     ? "-msp8"
 149     : "%<msp8";
 150 }