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|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
fragment <<EOF
/* This file is is generated by a shell script. DO NOT EDIT! */
/* Emulate the original gld for the given ${EMULATION_NAME}
Copyright (C) 2014-2015 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
Extended for the MSP430 by Nick Clifton nickc@redhat.com
This file is part of the GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define TARGET_IS_${EMULATION_NAME}
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
#include "libiberty.h"
EOF
# Import any needed special functions and/or overrides.
#
if test -n "$EXTRA_EM_FILE" ; then
source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em
fi
if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then
fragment <<EOF
static void
gld${EMULATION_NAME}_before_parse (void)
{
#ifndef TARGET_ /* I.e., if not generic. */
ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
#endif /* not TARGET_ */
/* The MSP430 port *needs* linker relaxtion in order to cope with large
functions where conditional branches do not fit into a +/- 1024 byte range. */
if (! link_info.relocatable)
TARGET_ENABLE_RELAXATION;
}
EOF
fi
if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then
fragment <<EOF
static char *
gld${EMULATION_NAME}_get_script (int *isfile)
EOF
if test x"$COMPILE_IN" = xyes
then
# Scripts compiled in.
# sed commands to quote an ld script as a C string.
sc="-f stringify.sed"
fragment <<EOF
{
*isfile = 0;
if (link_info.relocatable && config.build_constructors)
return
EOF
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c
echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c
echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c
echo ' ; else return' >> e${EMULATION_NAME}.c
sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c
echo '; }' >> e${EMULATION_NAME}.c
else
# Scripts read from the filesystem.
fragment <<EOF
{
*isfile = 1;
if (link_info.relocatable && config.build_constructors)
return "ldscripts/${EMULATION_NAME}.xu";
else if (link_info.relocatable)
return "ldscripts/${EMULATION_NAME}.xr";
else if (!config.text_read_only)
return "ldscripts/${EMULATION_NAME}.xbn";
else if (!config.magic_demand_paged)
return "ldscripts/${EMULATION_NAME}.xn";
else
return "ldscripts/${EMULATION_NAME}.x";
}
EOF
fi
fi
if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then
fragment <<EOF
/* Helper function for place_orphan that computes the size
of sections already mapped to the given statement. */
static bfd_size_type
scan_children (lang_statement_union_type * l)
{
bfd_size_type amount = 0;
while (l != NULL)
{
switch (l->header.type)
{
case lang_input_section_enum:
if (l->input_section.section->flags & SEC_ALLOC)
amount += l->input_section.section->size;
break;
case lang_constructors_statement_enum:
case lang_assignment_statement_enum:
break;
case lang_wild_statement_enum:
amount += scan_children (l->wild_statement.children.head);
break;
default:
fprintf (stderr, "msp430 orphan placer: unhandled lang type %d\n", l->header.type);
break;
}
l = l->header.next;
}
return amount;
}
/* Place an orphan section. We use this to put .either sections
into either their lower or their upper equivalents. */
static lang_output_section_statement_type *
gld${EMULATION_NAME}_place_orphan (asection * s,
const char * secname,
int constraint)
{
char * lower_name;
char * upper_name;
char * name;
lang_output_section_statement_type * lower;
lang_output_section_statement_type * upper;
lang_output_section_statement_type * os;
if ((s->flags & SEC_ALLOC) == 0)
return NULL;
if (link_info.relocatable)
return NULL;
/* If constraints are involved let the linker handle the placement normally. */
if (constraint != 0)
return NULL;
/* We only need special handling for .either sections. */
if (strncmp (secname, ".either.", 8) != 0)
return NULL;
/* Skip the .either prefix. */
secname += 7;
/* Compute the names of the corresponding upper and lower
sections. If the input section name contains another period,
only use the part of the name before the second dot. */
if (strchr (secname + 1, '.') != NULL)
{
name = ACONCAT ((secname, NULL));
* strchr (name + 1, '.') = 0;
}
else
name = (char *) secname;
lower_name = ACONCAT ((".lower", name, NULL));
upper_name = ACONCAT ((".upper", name, NULL));
/* Find the corresponding lower and upper sections. */
lower = lang_output_section_find (lower_name);
upper = lang_output_section_find (upper_name);
/* If the upper section does not exist, try again without the suffix. */
if (upper == NULL)
upper = lang_output_section_find (name);
if (lower == NULL)
{
os = upper;
if (upper == NULL)
{
einfo ("%P: error: no section named %s or %s in linker script\n", lower_name, upper_name);
return NULL;
}
}
else if (upper == NULL)
os = lower;
else if (lower->region == NULL)
os = lower;
/* If the section is too big for the region containing
the lower section then do not even try to use it. */
else if (lower->region->length < s->size)
os = upper;
else
{
bfd_size_type amount = 0;
struct lang_output_section_statement_struct * p;
amount += scan_children (lower->children.head);
/* Also check forwards for other statements assigned to the same region. */
for (p = lower->next; p != NULL; p = p->next)
if (p->region == lower->region)
amount += scan_children (p->children.head);
/* Scan backwards as well. */
for (p = lower->prev; p != NULL; p = p->prev)
if (p->region == lower->region)
amount += scan_children (p->children.head);
if (amount + s->size >= lower->region->length)
os = upper;
else
os = lower;
}
lang_add_section (& os->children, s, NULL, os);
return os;
}
EOF
fi
fragment <<EOF
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
{
${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse},
${LDEMUL_SYSLIB-syslib_default},
${LDEMUL_HLL-hll_default},
${LDEMUL_AFTER_PARSE-after_parse_default},
${LDEMUL_AFTER_OPEN-after_open_default},
${LDEMUL_AFTER_ALLOCATION-after_allocation_default},
${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default},
${LDEMUL_CHOOSE_TARGET-ldemul_default_target},
${LDEMUL_BEFORE_ALLOCATION-before_allocation_default},
${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script},
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
${LDEMUL_FINISH-finish_default},
${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL},
${LDEMUL_OPEN_DYNAMIC_ARCHIVE-NULL},
${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan},
${LDEMUL_SET_SYMBOLS-NULL},
${LDEMUL_PARSE_ARGS-NULL},
${LDEMUL_ADD_OPTIONS-NULL},
${LDEMUL_HANDLE_OPTION-NULL},
${LDEMUL_UNRECOGNIZED_FILE-NULL},
${LDEMUL_LIST_OPTIONS-NULL},
${LDEMUL_RECOGNIZED_FILE-NULL},
${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL},
${LDEMUL_NEW_VERS_PATTERN-NULL},
${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL}
};
EOF
#
# Local Variables:
# mode: c
# End:
|
