# This shell script emits a C file. -*- C -*-
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# This shell script emits a C file. -*- C -*-
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# Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2007,
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# Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2007,
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# 2008 Free Software Foundation, Inc.
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# 2008 Free Software Foundation, Inc.
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#
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#
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# This file is part of the GNU Binutils.
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# This file is part of the GNU Binutils.
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#
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#
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# This program is free software; you can redistribute it and/or modify
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# (at your option) any later version.
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#
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#
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# This program is distributed in the hope that it will be useful,
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# GNU General Public License for more details.
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#
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#
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# You should have received a copy of the GNU General Public License
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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# MA 02110-1301, USA.
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#
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#
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# This file is sourced from elf32.em, and defines extra m68hc12-elf
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# This file is sourced from elf32.em, and defines extra m68hc12-elf
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# and m68hc11-elf specific routines. It is used to generate the
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# and m68hc11-elf specific routines. It is used to generate the
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# HC11/HC12 trampolines to call a far function by using a normal 'jsr/bsr'.
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# HC11/HC12 trampolines to call a far function by using a normal 'jsr/bsr'.
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#
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#
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# - The HC11/HC12 relocations are checked to see if there is a
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# - The HC11/HC12 relocations are checked to see if there is a
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# R_M68HC11_16 relocation to a symbol marked with STO_M68HC12_FAR.
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# R_M68HC11_16 relocation to a symbol marked with STO_M68HC12_FAR.
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# This relocation cannot be made on the symbol but must be made on
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# This relocation cannot be made on the symbol but must be made on
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# its trampoline
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# its trampoline
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# The trampolines to generate are collected during this pass
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# The trampolines to generate are collected during this pass
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# (See elf32_m68hc11_size_stubs)
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# (See elf32_m68hc11_size_stubs)
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#
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#
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# - The trampolines are generated in a ".tramp" section. The generation
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# - The trampolines are generated in a ".tramp" section. The generation
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# takes care of HC11 and HC12 specificities.
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# takes care of HC11 and HC12 specificities.
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# (See elf32_m68hc11_build_stubs)
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# (See elf32_m68hc11_build_stubs)
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#
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#
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# - During relocation the R_M68HC11_16 relocation to the far symbols
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# - During relocation the R_M68HC11_16 relocation to the far symbols
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# are redirected to the trampoline that was generated.
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# are redirected to the trampoline that was generated.
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#
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#
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# Copied from hppaelf and adapted for M68HC11/M68HC12 specific needs.
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# Copied from hppaelf and adapted for M68HC11/M68HC12 specific needs.
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#
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#
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fragment <
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fragment <
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|
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#include "ldctor.h"
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#include "ldctor.h"
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#include "elf32-m68hc1x.h"
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#include "elf32-m68hc1x.h"
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|
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static asection *m68hc11elf_add_stub_section (const char *, asection *);
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static asection *m68hc11elf_add_stub_section (const char *, asection *);
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|
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/* Fake input file for stubs. */
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/* Fake input file for stubs. */
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static lang_input_statement_type *stub_file;
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static lang_input_statement_type *stub_file;
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|
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/* By default the HC11/HC12 trampolines to call a far function using
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/* By default the HC11/HC12 trampolines to call a far function using
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a normal 'bsr' and 'jsr' convention are generated during the link.
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a normal 'bsr' and 'jsr' convention are generated during the link.
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The --no-trampoline option prevents that. */
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The --no-trampoline option prevents that. */
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static int no_trampoline = 0;
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static int no_trampoline = 0;
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|
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/* Name of memory bank window in the MEMORY description.
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/* Name of memory bank window in the MEMORY description.
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This is set by --bank-window option. */
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This is set by --bank-window option. */
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static const char* bank_window_name = 0;
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static const char* bank_window_name = 0;
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|
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static void
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static void
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m68hc11_elf_${EMULATION_NAME}_before_allocation (void)
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m68hc11_elf_${EMULATION_NAME}_before_allocation (void)
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{
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{
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lang_memory_region_type* region;
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lang_memory_region_type* region;
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int ret;
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int ret;
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|
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gld${EMULATION_NAME}_before_allocation ();
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gld${EMULATION_NAME}_before_allocation ();
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|
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/* If generating a relocatable output file, then we don't
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/* If generating a relocatable output file, then we don't
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have to generate the trampolines. */
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have to generate the trampolines. */
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if (link_info.relocatable)
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if (link_info.relocatable)
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return;
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return;
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|
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ret = elf32_m68hc11_setup_section_lists (link_info.output_bfd, &link_info);
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ret = elf32_m68hc11_setup_section_lists (link_info.output_bfd, &link_info);
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if (ret != 0 && no_trampoline == 0)
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if (ret != 0 && no_trampoline == 0)
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{
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{
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if (ret < 0)
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if (ret < 0)
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{
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{
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einfo ("%X%P: can not size stub section: %E\n");
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einfo ("%X%P: can not size stub section: %E\n");
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return;
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return;
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}
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}
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|
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/* Call into the BFD backend to do the real work. */
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/* Call into the BFD backend to do the real work. */
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if (!elf32_m68hc11_size_stubs (link_info.output_bfd,
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if (!elf32_m68hc11_size_stubs (link_info.output_bfd,
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stub_file->the_bfd,
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stub_file->the_bfd,
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&link_info,
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&link_info,
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&m68hc11elf_add_stub_section))
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&m68hc11elf_add_stub_section))
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{
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{
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einfo ("%X%P: can not size stub section: %E\n");
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einfo ("%X%P: can not size stub section: %E\n");
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return;
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return;
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}
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}
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}
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}
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|
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if (bank_window_name == 0)
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if (bank_window_name == 0)
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return;
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return;
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|
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/* The 'bank_window_name' memory region is a special region that describes
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/* The 'bank_window_name' memory region is a special region that describes
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the memory bank window to access to paged memory. For 68HC12
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the memory bank window to access to paged memory. For 68HC12
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this is fixed and should be:
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this is fixed and should be:
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|
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window (rx) : ORIGIN = 0x8000, LENGTH = 16K
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window (rx) : ORIGIN = 0x8000, LENGTH = 16K
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|
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But for 68HC11 this is board specific. The definition of such
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But for 68HC11 this is board specific. The definition of such
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memory region allows to control how this paged memory is accessed. */
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memory region allows to control how this paged memory is accessed. */
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region = lang_memory_region_lookup (bank_window_name, FALSE);
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region = lang_memory_region_lookup (bank_window_name, FALSE);
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|
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/* Check the length to see if it was defined in the script. */
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/* Check the length to see if it was defined in the script. */
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if (region->length != 0)
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if (region->length != 0)
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{
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{
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struct m68hc11_page_info *pinfo;
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struct m68hc11_page_info *pinfo;
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unsigned i;
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unsigned i;
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|
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/* Get default values */
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/* Get default values */
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m68hc11_elf_get_bank_parameters (&link_info);
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m68hc11_elf_get_bank_parameters (&link_info);
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pinfo = &m68hc11_elf_hash_table (&link_info)->pinfo;
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pinfo = &m68hc11_elf_hash_table (&link_info)->pinfo;
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|
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/* And override them with the region definition. */
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/* And override them with the region definition. */
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pinfo->bank_size = region->length;
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pinfo->bank_size = region->length;
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pinfo->bank_shift = 0;
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pinfo->bank_shift = 0;
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for (i = pinfo->bank_size; i != 0; i >>= 1)
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for (i = pinfo->bank_size; i != 0; i >>= 1)
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pinfo->bank_shift++;
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pinfo->bank_shift++;
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pinfo->bank_shift--;
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pinfo->bank_shift--;
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pinfo->bank_size = 1L << pinfo->bank_shift;
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pinfo->bank_size = 1L << pinfo->bank_shift;
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pinfo->bank_mask = (1 << pinfo->bank_shift) - 1;
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pinfo->bank_mask = (1 << pinfo->bank_shift) - 1;
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pinfo->bank_physical = region->origin;
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pinfo->bank_physical = region->origin;
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pinfo->bank_physical_end = region->origin + pinfo->bank_size;
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pinfo->bank_physical_end = region->origin + pinfo->bank_size;
|
|
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if (pinfo->bank_size != region->length)
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if (pinfo->bank_size != region->length)
|
{
|
{
|
einfo (_("warning: the size of the 'window' memory region "
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einfo (_("warning: the size of the 'window' memory region "
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"is not a power of 2\n"));
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"is not a power of 2\n"));
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einfo (_("warning: its size %d is truncated to %d\n"),
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einfo (_("warning: its size %d is truncated to %d\n"),
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region->length, pinfo->bank_size);
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region->length, pinfo->bank_size);
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}
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}
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}
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}
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}
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}
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|
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/* This is called before the input files are opened. We create a new
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/* This is called before the input files are opened. We create a new
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fake input file to hold the stub sections. */
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fake input file to hold the stub sections. */
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|
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static void
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static void
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m68hc11elf_create_output_section_statements (void)
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m68hc11elf_create_output_section_statements (void)
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{
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{
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stub_file = lang_add_input_file ("linker stubs",
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stub_file = lang_add_input_file ("linker stubs",
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lang_input_file_is_fake_enum,
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lang_input_file_is_fake_enum,
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NULL);
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NULL);
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stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
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stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
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if (stub_file->the_bfd == NULL
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if (stub_file->the_bfd == NULL
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|| !bfd_set_arch_mach (stub_file->the_bfd,
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|| !bfd_set_arch_mach (stub_file->the_bfd,
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bfd_get_arch (link_info.output_bfd),
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bfd_get_arch (link_info.output_bfd),
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bfd_get_mach (link_info.output_bfd)))
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bfd_get_mach (link_info.output_bfd)))
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{
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{
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einfo ("%X%P: can not create BFD %E\n");
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einfo ("%X%P: can not create BFD %E\n");
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return;
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return;
|
}
|
}
|
|
|
ldlang_add_file (stub_file);
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ldlang_add_file (stub_file);
|
}
|
}
|
|
|
|
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struct hook_stub_info
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struct hook_stub_info
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{
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{
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lang_statement_list_type add;
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lang_statement_list_type add;
|
asection *input_section;
|
asection *input_section;
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};
|
};
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|
|
/* Traverse the linker tree to find the spot where the stub goes. */
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/* Traverse the linker tree to find the spot where the stub goes. */
|
|
|
static bfd_boolean
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static bfd_boolean
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hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
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hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
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{
|
{
|
lang_statement_union_type *l;
|
lang_statement_union_type *l;
|
bfd_boolean ret;
|
bfd_boolean ret;
|
|
|
for (; (l = *lp) != NULL; lp = &l->header.next)
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for (; (l = *lp) != NULL; lp = &l->header.next)
|
{
|
{
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switch (l->header.type)
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switch (l->header.type)
|
{
|
{
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case lang_constructors_statement_enum:
|
case lang_constructors_statement_enum:
|
ret = hook_in_stub (info, &constructor_list.head);
|
ret = hook_in_stub (info, &constructor_list.head);
|
if (ret)
|
if (ret)
|
return ret;
|
return ret;
|
break;
|
break;
|
|
|
case lang_output_section_statement_enum:
|
case lang_output_section_statement_enum:
|
ret = hook_in_stub (info,
|
ret = hook_in_stub (info,
|
&l->output_section_statement.children.head);
|
&l->output_section_statement.children.head);
|
if (ret)
|
if (ret)
|
return ret;
|
return ret;
|
break;
|
break;
|
|
|
case lang_wild_statement_enum:
|
case lang_wild_statement_enum:
|
ret = hook_in_stub (info, &l->wild_statement.children.head);
|
ret = hook_in_stub (info, &l->wild_statement.children.head);
|
if (ret)
|
if (ret)
|
return ret;
|
return ret;
|
break;
|
break;
|
|
|
case lang_group_statement_enum:
|
case lang_group_statement_enum:
|
ret = hook_in_stub (info, &l->group_statement.children.head);
|
ret = hook_in_stub (info, &l->group_statement.children.head);
|
if (ret)
|
if (ret)
|
return ret;
|
return ret;
|
break;
|
break;
|
|
|
case lang_input_section_enum:
|
case lang_input_section_enum:
|
if (l->input_section.section == info->input_section
|
if (l->input_section.section == info->input_section
|
|| strcmp (bfd_get_section_name (output_section,
|
|| strcmp (bfd_get_section_name (output_section,
|
l->input_section.section),
|
l->input_section.section),
|
bfd_get_section_name (output_section,
|
bfd_get_section_name (output_section,
|
info->input_section)) == 0)
|
info->input_section)) == 0)
|
{
|
{
|
/* We've found our section. Insert the stub immediately
|
/* We've found our section. Insert the stub immediately
|
before its associated input section. */
|
before its associated input section. */
|
*lp = info->add.head;
|
*lp = info->add.head;
|
*(info->add.tail) = l;
|
*(info->add.tail) = l;
|
return TRUE;
|
return TRUE;
|
}
|
}
|
break;
|
break;
|
|
|
case lang_data_statement_enum:
|
case lang_data_statement_enum:
|
case lang_reloc_statement_enum:
|
case lang_reloc_statement_enum:
|
case lang_object_symbols_statement_enum:
|
case lang_object_symbols_statement_enum:
|
case lang_output_statement_enum:
|
case lang_output_statement_enum:
|
case lang_target_statement_enum:
|
case lang_target_statement_enum:
|
case lang_input_statement_enum:
|
case lang_input_statement_enum:
|
case lang_assignment_statement_enum:
|
case lang_assignment_statement_enum:
|
case lang_padding_statement_enum:
|
case lang_padding_statement_enum:
|
case lang_address_statement_enum:
|
case lang_address_statement_enum:
|
case lang_fill_statement_enum:
|
case lang_fill_statement_enum:
|
break;
|
break;
|
|
|
default:
|
default:
|
FAIL ();
|
FAIL ();
|
break;
|
break;
|
}
|
}
|
}
|
}
|
return FALSE;
|
return FALSE;
|
}
|
}
|
|
|
|
|
/* Call-back for elf32_m68hc11_size_stubs. */
|
/* Call-back for elf32_m68hc11_size_stubs. */
|
|
|
/* Create a new stub section, and arrange for it to be linked
|
/* Create a new stub section, and arrange for it to be linked
|
immediately before INPUT_SECTION. */
|
immediately before INPUT_SECTION. */
|
|
|
static asection *
|
static asection *
|
m68hc11elf_add_stub_section (const char *stub_sec_name,
|
m68hc11elf_add_stub_section (const char *stub_sec_name,
|
asection *tramp_section)
|
asection *tramp_section)
|
{
|
{
|
asection *stub_sec;
|
asection *stub_sec;
|
flagword flags;
|
flagword flags;
|
asection *output_section;
|
asection *output_section;
|
const char *secname;
|
const char *secname;
|
lang_output_section_statement_type *os;
|
lang_output_section_statement_type *os;
|
struct hook_stub_info info;
|
struct hook_stub_info info;
|
|
|
stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
|
stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
|
if (stub_sec == NULL)
|
if (stub_sec == NULL)
|
goto err_ret;
|
goto err_ret;
|
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
|
| SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
|
| SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
|
if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
|
if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
|
goto err_ret;
|
goto err_ret;
|
|
|
output_section = tramp_section->output_section;
|
output_section = tramp_section->output_section;
|
secname = bfd_get_section_name (output_section->owner, output_section);
|
secname = bfd_get_section_name (output_section->owner, output_section);
|
os = lang_output_section_find (secname);
|
os = lang_output_section_find (secname);
|
|
|
/* Try to put the new section at the same place as an existing
|
/* Try to put the new section at the same place as an existing
|
.tramp section. Such .tramp section exists in most cases and
|
.tramp section. Such .tramp section exists in most cases and
|
contains the trampoline code. This way we put the generated trampoline
|
contains the trampoline code. This way we put the generated trampoline
|
at the correct place. */
|
at the correct place. */
|
info.input_section = tramp_section;
|
info.input_section = tramp_section;
|
lang_list_init (&info.add);
|
lang_list_init (&info.add);
|
lang_add_section (&info.add, stub_sec, os);
|
lang_add_section (&info.add, stub_sec, os);
|
|
|
if (info.add.head == NULL)
|
if (info.add.head == NULL)
|
goto err_ret;
|
goto err_ret;
|
|
|
if (hook_in_stub (&info, &os->children.head))
|
if (hook_in_stub (&info, &os->children.head))
|
return stub_sec;
|
return stub_sec;
|
|
|
err_ret:
|
err_ret:
|
einfo ("%X%P: can not make stub section: %E\n");
|
einfo ("%X%P: can not make stub section: %E\n");
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* Final emulation specific call. For the 68HC12 we use this opportunity
|
/* Final emulation specific call. For the 68HC12 we use this opportunity
|
to build linker stubs. */
|
to build linker stubs. */
|
|
|
static void
|
static void
|
m68hc11elf_finish (void)
|
m68hc11elf_finish (void)
|
{
|
{
|
/* Now build the linker stubs. */
|
/* Now build the linker stubs. */
|
if (stub_file->the_bfd->sections != NULL)
|
if (stub_file->the_bfd->sections != NULL)
|
{
|
{
|
/* Call again the trampoline analyzer to initialize the trampoline
|
/* Call again the trampoline analyzer to initialize the trampoline
|
stubs with the correct symbol addresses. Since there could have
|
stubs with the correct symbol addresses. Since there could have
|
been relaxation, the symbol addresses that were found during
|
been relaxation, the symbol addresses that were found during
|
first call may no longer be correct. */
|
first call may no longer be correct. */
|
if (!elf32_m68hc11_size_stubs (link_info.output_bfd,
|
if (!elf32_m68hc11_size_stubs (link_info.output_bfd,
|
stub_file->the_bfd,
|
stub_file->the_bfd,
|
&link_info, 0))
|
&link_info, 0))
|
{
|
{
|
einfo ("%X%P: can not size stub section: %E\n");
|
einfo ("%X%P: can not size stub section: %E\n");
|
return;
|
return;
|
}
|
}
|
if (!elf32_m68hc11_build_stubs (link_info.output_bfd, &link_info))
|
if (!elf32_m68hc11_build_stubs (link_info.output_bfd, &link_info))
|
einfo ("%X%P: can not build stubs: %E\n");
|
einfo ("%X%P: can not build stubs: %E\n");
|
}
|
}
|
|
|
gld${EMULATION_NAME}_finish ();
|
gld${EMULATION_NAME}_finish ();
|
}
|
}
|
|
|
|
|
/* Avoid processing the fake stub_file in vercheck, stat_needed and
|
/* Avoid processing the fake stub_file in vercheck, stat_needed and
|
check_needed routines. */
|
check_needed routines. */
|
|
|
static void (*real_func) (lang_input_statement_type *);
|
static void (*real_func) (lang_input_statement_type *);
|
|
|
static void m68hc11_for_each_input_file_wrapper (lang_input_statement_type *l)
|
static void m68hc11_for_each_input_file_wrapper (lang_input_statement_type *l)
|
{
|
{
|
if (l != stub_file)
|
if (l != stub_file)
|
(*real_func) (l);
|
(*real_func) (l);
|
}
|
}
|
|
|
static void
|
static void
|
m68hc11_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
|
m68hc11_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
|
{
|
{
|
real_func = func;
|
real_func = func;
|
lang_for_each_input_file (&m68hc11_for_each_input_file_wrapper);
|
lang_for_each_input_file (&m68hc11_for_each_input_file_wrapper);
|
}
|
}
|
|
|
#define lang_for_each_input_file m68hc11_lang_for_each_input_file
|
#define lang_for_each_input_file m68hc11_lang_for_each_input_file
|
|
|
EOF
|
EOF
|
|
|
# Define some shell vars to insert bits of code into the standard elf
|
# Define some shell vars to insert bits of code into the standard elf
|
# parse_args and list_options functions.
|
# parse_args and list_options functions.
|
#
|
#
|
PARSE_AND_LIST_PROLOGUE='
|
PARSE_AND_LIST_PROLOGUE='
|
#define OPTION_NO_TRAMPOLINE 300
|
#define OPTION_NO_TRAMPOLINE 300
|
#define OPTION_BANK_WINDOW 301
|
#define OPTION_BANK_WINDOW 301
|
'
|
'
|
|
|
# The options are repeated below so that no abbreviations are allowed.
|
# The options are repeated below so that no abbreviations are allowed.
|
# Otherwise -s matches stub-group-size
|
# Otherwise -s matches stub-group-size
|
PARSE_AND_LIST_LONGOPTS='
|
PARSE_AND_LIST_LONGOPTS='
|
{ "no-trampoline", no_argument, NULL, OPTION_NO_TRAMPOLINE },
|
{ "no-trampoline", no_argument, NULL, OPTION_NO_TRAMPOLINE },
|
{ "bank-window", required_argument, NULL, OPTION_BANK_WINDOW },
|
{ "bank-window", required_argument, NULL, OPTION_BANK_WINDOW },
|
'
|
'
|
|
|
PARSE_AND_LIST_OPTIONS='
|
PARSE_AND_LIST_OPTIONS='
|
fprintf (file, _(
|
fprintf (file, _(
|
" --no-trampoline Do not generate the far trampolines used to call\n"
|
" --no-trampoline Do not generate the far trampolines used to call\n"
|
" a far function using 'jsr' or 'bsr'.\n"
|
" a far function using 'jsr' or 'bsr'.\n"
|
" --bank-window NAME Specify the name of the memory region describing\n"
|
" --bank-window NAME Specify the name of the memory region describing\n"
|
" the layout of the memory bank window.\n"
|
" the layout of the memory bank window.\n"
|
));
|
));
|
'
|
'
|
|
|
PARSE_AND_LIST_ARGS_CASES='
|
PARSE_AND_LIST_ARGS_CASES='
|
case OPTION_NO_TRAMPOLINE:
|
case OPTION_NO_TRAMPOLINE:
|
no_trampoline = 1;
|
no_trampoline = 1;
|
break;
|
break;
|
case OPTION_BANK_WINDOW:
|
case OPTION_BANK_WINDOW:
|
bank_window_name = optarg;
|
bank_window_name = optarg;
|
break;
|
break;
|
'
|
'
|
|
|
# Put these extra m68hc11elf routines in ld_${EMULATION_NAME}_emulation
|
# Put these extra m68hc11elf routines in ld_${EMULATION_NAME}_emulation
|
#
|
#
|
LDEMUL_BEFORE_ALLOCATION=m68hc11_elf_${EMULATION_NAME}_before_allocation
|
LDEMUL_BEFORE_ALLOCATION=m68hc11_elf_${EMULATION_NAME}_before_allocation
|
LDEMUL_FINISH=m68hc11elf_finish
|
LDEMUL_FINISH=m68hc11elf_finish
|
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=m68hc11elf_create_output_section_statements
|
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=m68hc11elf_create_output_section_statements
|
|
|
