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/* Subroutines for the gcc driver.
Copyright (C) 2015-2020 Free Software Foundation, Inc.
Contributed by Georg-Johann Lay <avr@gjlay.de>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#define IN_TARGET_CODE 1
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "diagnostic.h"
#include "tm.h"
#include "msp430-devices.h"
/* This spec function is called if the user has provided an -mmcu option without
an -mcpu option. It will place the correct -mcpu option for the given -mmcu
onto the command line, to ensure the correct ISA multilib is selected. */
const char *
msp430_select_cpu (int argc, const char ** argv)
{
if (argc == 0)
{
error ("expected an argument to %<msp430_select_cpu%>");
return NULL;
}
msp430_extract_mcu_data (argv[0]);
if (extracted_mcu_data.name != NULL)
{
switch (extracted_mcu_data.revision)
{
case 0: return "-mcpu=msp430";
case 1: return "-mcpu=msp430x";
case 2: return "-mcpu=msp430xv2";
default:
gcc_unreachable ();
}
}
/* MCU wasn't found, the compiler proper will warn about this. */
return NULL;
}
/* Spec function to set a global variable to a specific value in the driver.
The first argument is the variable name, and the second is the value to set
it to.
Currently only "msp430_warn_devices_csv" and "msp430_devices_csv_loc" are
supported.
The intention is that we can take a "Target" option and set the variable
associated with it in the driver as well. Whilst the driver sees "Target"
options, it does not set the variables associated with that option. */
const char *
msp430_set_driver_var (int argc, const char ** argv)
{
if (argc != 2)
error ("%<msp430_set_driver_var%> expects 2 arguments");
else if (strcmp (argv[0], "msp430_warn_devices_csv") == 0)
msp430_warn_devices_csv = atoi (argv[1]);
else if (strcmp (argv[0], "msp430_devices_csv_loc") == 0)
msp430_devices_csv_loc = argv[1];
else
error ("unhandled arguments %qs and %qs to %<msp430_set_driver_var%>",
argv[0], argv[1]);
return NULL;
}
/* Implement spec function `msp430_hwmult_lib´. */
const char *
msp430_select_hwmult_lib (int argc ATTRIBUTE_UNUSED,
const char ** argv ATTRIBUTE_UNUSED)
{
int i;
switch (argc)
{
case 1:
if (strcasecmp (argv[0], "default"))
error ("unexpected argument to msp430_select_hwmult_lib: %s", argv[0]);
break;
default:
/* We can get three or more arguments passed to this function.
This happens when the same option is repeated on the command line.
For example:
msp430-elf-gcc -mhwmult=none -mhwmult=16bit foo.c
We have to use the last argument as our selector. */
if (strcasecmp (argv[0], "hwmult") == 0)
{
static struct hwmult_options
{
const char * name;
const char * lib;
} hwmult_options[] =
{
{ "none", "-lmul_none" },
{ "auto", "-lmul_AUTO" }, /* Should not see this one... */
{ "16bit", "-lmul_16" },
{ "32bit", "-lmul_32" },
{ "f5series", "-lmul_f5" }
};
for (i = ARRAY_SIZE (hwmult_options); i--;)
if (strcasecmp (argv[argc - 1], hwmult_options[i].name) == 0)
return hwmult_options[i].lib;
}
else if (strcasecmp (argv[0], "mcu") == 0)
{
msp430_extract_mcu_data (argv[argc - 1]);
if (extracted_mcu_data.name != NULL)
{
switch (extracted_mcu_data.hwmpy)
{
case 0: return "-lmul_none";
case 2:
case 1: return "-lmul_16";
case 4: return "-lmul_32";
case 8: return "-lmul_f5";
default:
/* We have already checked the hwmpy values for
validity in msp430_extract_mcu_data. */
gcc_unreachable ();
break;
}
}
}
else
error ("unexpected first argument to msp430_select_hwmult_lib: %s",
argv[0]);
break;
case 0:
error ("msp430_select_hwmult_lib needs one or more arguments");
break;
}
return "-lmul_none";
}
/* Spec function. Used to place the path to the MSP430-GCC support files
on the command line, prefixed with "-L", so the linker finds the linker
scripts in that directory. */
const char *
msp430_get_linker_devices_include_path (int argc ATTRIBUTE_UNUSED,
const char **argv ATTRIBUTE_UNUSED)
{
char *devices_csv_path;
if (msp430_check_env_var_for_devices (&devices_csv_path))
return NULL;
return concat ("-L", msp430_dirname (devices_csv_path), NULL);
}
/* Spec function. Propagate -m{code,data}-region= to the linker, unless the
lower region has been specified without -muse-lower-region-prefix also being
used. */
const char *
msp430_propagate_region_opt (int argc, const char **argv)
{
if (strcmp (argv[0], "lower") != 0)
return argv[0];
else if ((argc == 2) && (strcmp (argv[1], "-muse-lower-region-prefix") == 0))
return argv[0]; /* argv[0] == "lower". */
return "none";
}
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