711 lines
21 KiB
Text
711 lines
21 KiB
Text
# This shell script emits a C file. -*- C -*-
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# It does some substitutions.
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cat >e${EMULATION_NAME}.c <<EOF
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/* For WINDOWS_NT */
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/* The original file generated returned different default scripts depending
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on whether certain switches were set, but these switches pertain to the
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Linux system and that particular version of coff. In the NT case, we
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only determine if the subsystem is console or windows in order to select
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the correct entry point by default. */
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/* This file is part of GLD, the Gnu Linker.
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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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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "getopt.h"
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#include "ld.h"
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#include "ld.h"
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#include "ldmain.h"
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#include "ldgram.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldemul.h"
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#include "ldlex.h"
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#include "ldmisc.h"
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#include "ldctor.h"
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#include "ldfile.h"
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#include "coff/internal.h"
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#include "../bfd/libcoff.h"
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#define TARGET_IS_${EMULATION_NAME}
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static void gld_${EMULATION_NAME}_set_symbols PARAMS ((void));
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static void gld_${EMULATION_NAME}_after_open PARAMS ((void));
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static void gld_${EMULATION_NAME}_before_parse PARAMS ((void));
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static void gld_${EMULATION_NAME}_before_allocation PARAMS ((void));
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static boolean gld${EMULATION_NAME}_place_orphan
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PARAMS ((lang_input_statement_type *, asection *));
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static char *gld_${EMULATION_NAME}_get_script PARAMS ((int *));
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static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
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#if 0 /* argument to qsort so don't prototype */
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static int sort_by_file_name PARAMS ((void *, void *));
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static int sort_by_section_name PARAMS ((void *, void *));
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#endif
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static lang_statement_union_type **sort_sections_1
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PARAMS ((lang_statement_union_type **, lang_statement_union_type *, int,
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int (*)()));
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static void sort_sections PARAMS ((lang_statement_union_type *));
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static struct internal_extra_pe_aouthdr pe;
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static int dll;
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static void
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gld_${EMULATION_NAME}_before_parse()
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{
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ldfile_output_architecture = bfd_arch_${ARCH};
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}
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/* PE format extra command line options. */
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/* Used for setting flags in the PE header. */
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#define OPTION_BASE_FILE (300 + 1)
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#define OPTION_DLL (OPTION_BASE_FILE + 1)
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#define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1)
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#define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1)
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#define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1)
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#define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1)
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#define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1)
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#define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
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#define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1)
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#define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1)
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#define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1)
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#define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1)
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#define OPTION_SUBSYSTEM (OPTION_STACK + 1)
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#define OPTION_HEAP (OPTION_SUBSYSTEM + 1)
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static struct option longopts[] = {
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/* PE options */
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{"base-file", required_argument, NULL, OPTION_BASE_FILE},
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{"dll", no_argument, NULL, OPTION_DLL},
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{"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
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{"heap", required_argument, NULL, OPTION_HEAP},
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{"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
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{"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
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{"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
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{"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
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{"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
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{"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
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{"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
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{"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
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{"stack", required_argument, NULL, OPTION_STACK},
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{"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
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{NULL, no_argument, NULL, 0}
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};
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/* PE/WIN32; added routines to get the subsystem type, heap and/or stack
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parameters which may be input from the command line */
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typedef struct {
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void *ptr;
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int size;
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int value;
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char *symbol;
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int inited;
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} definfo;
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#define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0}
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static definfo init[] =
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{
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/* imagebase must be first */
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#define IMAGEBASEOFF 0
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D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
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#define DLLOFF 1
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{&dll, sizeof(dll), 0, "__dll__"},
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D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
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D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
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D(MajorOperatingSystemVersion,"__major_os_version__", 4),
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D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
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D(MajorImageVersion,"__major_image_version__", 1),
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D(MinorImageVersion,"__minor_image_version__", 0),
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D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
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D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
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D(Subsystem,"__subsystem__", 3),
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D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x2000000),
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D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
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D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
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D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
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D(LoaderFlags,"__loader_flags__", 0x0),
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0
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};
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static void
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set_pe_name (name, val)
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char *name;
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long val;
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{
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int i;
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/* Find the name and set it. */
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for (i = 0; init[i].ptr; i++)
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{
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if (strcmp (name, init[i].symbol) == 0)
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{
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init[i].value = val;
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init[i].inited = 1;
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return;
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}
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}
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abort();
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}
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static void
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set_pe_subsystem ()
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{
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int i;
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static struct
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{
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char *name ;
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int value;
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}
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v[] =
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{
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{"native", 1},
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{"windows",2},
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{"console",3},
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{"os2",5},
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{"posix", 7},
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{0,0}
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};
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for (i = 0; v[i].name; i++)
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{
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if (!strcmp (optarg, v[i].name))
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{
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set_pe_name ("__subsystem__", v[i].value);
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/* If the subsystem is windows, we use a different entry
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point. We also register the entry point as an undefined
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symbol. The reason we do this is so that the user
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doesn't have to because they would have to use the -u
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switch if they were specifying an entry point other than
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_mainCRTStartup. Specifically, if creating a windows
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application, entry point _WinMainCRTStartup must be
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specified. What I have found for non console
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applications (entry not _mainCRTStartup) is that the .obj
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that contains mainCRTStartup is brought in since it is
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the first encountered in libc.lib and it has other
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symbols in it which will be pulled in by the link
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process. To avoid this, adding -u with the entry point
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name specified forces the correct .obj to be used. We
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can avoid making the user do this by always adding the
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entry point name as an undefined symbol. */
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if (v[i].value == 2)
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{
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lang_add_entry ("_WinMainCRTStartup", 1);
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ldlang_add_undef ("_WinMainCRTStartup");
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}
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return;
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}
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}
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einfo ("%P%F: invalid subsystem type %s\n", optarg);
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}
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static void
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set_pe_value (name)
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char *name;
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{
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char *end;
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set_pe_name (name, strtoul (optarg, &end, 0));
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if (end == optarg)
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{
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einfo ("%P%F: invalid hex number for PE parameter '%s'\n", optarg);
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}
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optarg = end;
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}
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static void
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set_pe_stack_heap (resname, comname)
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char *resname;
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char *comname;
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{
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char *begin_commit;
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char *end;
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set_pe_value (resname);
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if (*optarg == ',')
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{
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optarg++;
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set_pe_value (comname);
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}
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else if (*optarg)
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{
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einfo ("%P%F: strange hex info for PE parameter '%s'\n", optarg);
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}
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}
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static int
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gld_${EMULATION_NAME}_parse_args(argc, argv)
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int argc;
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char **argv;
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{
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int longind;
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int optc;
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int prevoptind = optind;
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int prevopterr = opterr;
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int wanterror;
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static int lastoptind = -1;
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if (lastoptind != optind)
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opterr = 0;
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wanterror = opterr;
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lastoptind = optind;
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optc = getopt_long_only (argc, argv, "-", longopts, &longind);
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opterr = prevopterr;
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switch (optc)
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{
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default:
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if (wanterror)
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xexit (1);
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optind = prevoptind;
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return 0;
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case OPTION_BASE_FILE:
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link_info.base_file = (PTR) fopen (optarg, FOPEN_WB);
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if (link_info.base_file == NULL)
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{
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fprintf (stderr, "%s: Can't open base file %s\n",
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program_name, optarg);
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xexit (1);
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}
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break;
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/* PE options */
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case OPTION_HEAP:
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set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
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break;
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case OPTION_STACK:
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set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
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break;
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case OPTION_SUBSYSTEM:
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set_pe_subsystem ();
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break;
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case OPTION_MAJOR_OS_VERSION:
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set_pe_value ("__major_os_version__");
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break;
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case OPTION_MINOR_OS_VERSION:
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set_pe_value ("__minor_os_version__");
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break;
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case OPTION_MAJOR_SUBSYSTEM_VERSION:
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set_pe_value ("__major_subsystem_version__");
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break;
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case OPTION_MINOR_SUBSYSTEM_VERSION:
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set_pe_value ("__minor_subsystem_version__");
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break;
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case OPTION_MAJOR_IMAGE_VERSION:
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set_pe_value ("__major_image_version__");
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break;
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case OPTION_MINOR_IMAGE_VERSION:
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set_pe_value ("__minor_image_version__");
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break;
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case OPTION_FILE_ALIGNMENT:
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set_pe_value ("__file_alignment__");
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break;
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case OPTION_SECTION_ALIGNMENT:
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set_pe_value ("__section_alignment__");
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break;
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case OPTION_DLL:
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set_pe_name ("__dll__", 1);
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break;
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case OPTION_IMAGE_BASE:
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set_pe_value ("__image_base__");
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break;
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}
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return 1;
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}
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static void
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gld_${EMULATION_NAME}_set_symbols()
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{
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/* Run through and invent symbols for all the
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names and insert the defaults. */
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int j;
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lang_statement_list_type *save;
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if (!init[IMAGEBASEOFF].inited)
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init[IMAGEBASEOFF].value = init[DLLOFF].value
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? NT_DLL_IMAGE_BASE : NT_EXE_IMAGE_BASE;
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/* Glue the assignments into the abs section */
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save = stat_ptr;
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stat_ptr = &(abs_output_section->children);
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for (j = 0; init[j].ptr; j++)
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{
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long val = init[j].value;
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lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val)));
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if (init[j].size == sizeof(short))
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*(short *)init[j].ptr = val;
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else if (init[j].size == sizeof(int))
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*(int *)init[j].ptr = val;
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else if (init[j].size == sizeof(long))
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*(long *)init[j].ptr = val;
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else abort();
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}
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/* Restore the pointer. */
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stat_ptr = save;
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if (pe.FileAlignment >
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pe.SectionAlignment)
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{
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einfo ("%P: warning, file alignment > section alignment.\n");
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}
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}
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static void
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gld_${EMULATION_NAME}_after_open()
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{
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/* Pass the wacky PE command line options into the output bfd */
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struct internal_extra_pe_aouthdr *i;
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if (!coff_data(output_bfd)->pe)
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{
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einfo ("%F%P: PE operations on non PE file.\n");
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}
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pe_data(output_bfd)->pe_opthdr = pe;
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pe_data(output_bfd)->dll = init[DLLOFF].value;
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}
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/* Callback functions for qsort in sort_sections. */
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static int
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sort_by_file_name (a, b)
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void *a;
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void *b;
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{
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lang_statement_union_type **ra = a;
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lang_statement_union_type **rb = b;
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return strcmp ((*ra)->input_section.ifile->filename,
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(*rb)->input_section.ifile->filename);
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}
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static int
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sort_by_section_name (a, b)
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void *a;
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void *b;
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{
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lang_statement_union_type **ra = a;
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lang_statement_union_type **rb = b;
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return strcmp ((*ra)->input_section.section->name,
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(*rb)->input_section.section->name);
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}
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/* Subroutine of sort_sections to a contiguous subset of a list of sections.
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NEXT_AFTER is the element after the last one to sort.
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The result is a pointer to the last element's "next" pointer. */
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static lang_statement_union_type **
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sort_sections_1 (startptr, next_after, count, sort_func)
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lang_statement_union_type **startptr,*next_after;
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int count;
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int (*sort_func) ();
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{
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lang_statement_union_type **vec;
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lang_statement_union_type *p;
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int i;
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if (count == 0)
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return startptr;
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vec = (lang_statement_union_type **)
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alloca (count * sizeof (lang_statement_union_type *));
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for (p = *startptr, i = 0; i < count; i++, p = p->next)
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vec[i] = p;
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qsort (vec, count, sizeof (vec[0]), sort_func);
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/* Fill in the next pointers again. */
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*startptr = vec[0];
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for (i = 0; i < count - 1; i++)
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vec[i]->header.next = vec[i + 1];
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vec[i]->header.next = next_after;
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return &(vec[i]->header.next);
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}
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/* Sort the .idata\$foo input sections of archives into filename order.
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The reason is so dlltool can arrange to have the pe dll import information
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generated correctly - the head of the list goes into dh.o, the tail into
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dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
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.idata section.
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FIXME: This may no longer be necessary with grouped sections. Instead of
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sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
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.idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
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This would have to be elaborated upon to handle multiple dll's
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[assuming such an eloboration is possible of course].
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We also sort sections in '\$' wild statements. These are created by the
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place_orphans routine to implement grouped sections. */
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static void
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sort_sections (s)
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lang_statement_union_type *s;
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{
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for (; s ; s = s->next)
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switch (s->header.type)
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{
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case lang_output_section_statement_enum:
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sort_sections (s->output_section_statement.children.head);
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break;
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case lang_wild_statement_enum:
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{
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lang_statement_union_type **p = &s->wild_statement.children.head;
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/* Is this the .idata section? */
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if (s->wild_statement.section_name != NULL
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&& strncmp (s->wild_statement.section_name, ".idata", 6) == 0)
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{
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/* Sort any children in the same archive. Run through all
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the children of this wild statement, when an
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input_section in an archive is found, scan forward to
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find all input_sections which are in the same archive.
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Sort them by their filename and then re-thread the
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pointer chain. */
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||
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while (*p)
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{
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lang_statement_union_type *start = *p;
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if (start->header.type != lang_input_section_enum
|
||
|| !start->input_section.ifile->the_bfd->my_archive)
|
||
p = &(start->header.next);
|
||
else
|
||
{
|
||
lang_statement_union_type *end;
|
||
int count;
|
||
|
||
for (end = start, count = 0;
|
||
end && end->header.type == lang_input_section_enum
|
||
&& (end->input_section.ifile->the_bfd->my_archive
|
||
== start->input_section.ifile->the_bfd->my_archive);
|
||
end = end->next)
|
||
count++;
|
||
|
||
p = sort_sections_1 (p, end, count, sort_by_file_name);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* If this is a collection of grouped sections, sort them.
|
||
The linker script must explicitly mention "*(.foo\$)".
|
||
Don't sort them if \$ is not the last character (not sure if
|
||
this is really useful, but it allows explicitly mentioning
|
||
some \$ sections and letting the linker handle the rest). */
|
||
if (s->wild_statement.section_name != NULL)
|
||
{
|
||
char *q = strchr (s->wild_statement.section_name, '\$');
|
||
|
||
if (q && q[1] == 0)
|
||
{
|
||
lang_statement_union_type *end;
|
||
int count;
|
||
|
||
for (end = *p, count = 0; end; end = end->next)
|
||
{
|
||
if (end->header.type != lang_input_section_enum)
|
||
abort ();
|
||
count++;
|
||
}
|
||
(void) sort_sections_1 (p, end, count, sort_by_section_name);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void
|
||
gld_${EMULATION_NAME}_before_allocation()
|
||
{
|
||
extern lang_statement_list_type *stat_ptr;
|
||
|
||
#ifdef TARGET_IS_ppcpe
|
||
/* Here we rummage through the found bfds to collect toc information */
|
||
{
|
||
LANG_FOR_EACH_INPUT_STATEMENT (is)
|
||
{
|
||
if (!ppc_process_before_allocation(is->the_bfd, &link_info))
|
||
{
|
||
einfo("Errors encountered processing file %s", is->filename);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We have seen it all. Allocate it, and carry on */
|
||
ppc_allocate_toc_section (&link_info);
|
||
#endif
|
||
|
||
sort_sections (stat_ptr->head);
|
||
}
|
||
|
||
/* Place an orphan section. We use this to put sections with a '\$' in them
|
||
into the right place. Any section with a '\$' in them (e.g. .text\$foo)
|
||
gets mapped to the output section with everything from the '\$' on stripped
|
||
(e.g. .text).
|
||
See the Microsoft Portable Executable and Common Object File Format
|
||
Specification 4.1, section 4.2, Grouped Sections. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
gld${EMULATION_NAME}_place_orphan (file, s)
|
||
lang_input_statement_type *file;
|
||
asection *s;
|
||
{
|
||
const char *secname;
|
||
char *output_secname, *ps;
|
||
lang_output_section_statement_type *os;
|
||
lang_statement_list_type *ptr;
|
||
lang_statement_union_type *l;
|
||
|
||
if ((s->flags & SEC_ALLOC) == 0)
|
||
return false;
|
||
|
||
/* Don't process grouped sections unless doing a final link.
|
||
If they're marked as COMDAT sections, we don't want .text\$foo to
|
||
end up in .text and then have .text disappear because it's marked
|
||
link-once-discard. */
|
||
if (link_info.relocateable)
|
||
return false;
|
||
|
||
secname = bfd_get_section_name (s->owner, s);
|
||
|
||
/* Everything from the '\$' on gets deleted so don't allow '\$' as the
|
||
first character. */
|
||
if (*secname == '\$')
|
||
einfo ("%P%F: section %s has '\$' as first character\n", secname);
|
||
if (strchr (secname + 1, '\$') == NULL)
|
||
return false;
|
||
|
||
/* Look up the output section. The Microsoft specs say sections names in
|
||
image files never contain a '\$'. Fortunately, lang_..._lookup creates
|
||
the section if it doesn't exist. */
|
||
output_secname = buystring (secname);
|
||
ps = strchr (output_secname + 1, '\$');
|
||
*ps = 0;
|
||
os = lang_output_section_statement_lookup (output_secname);
|
||
|
||
/* Find the '\$' wild statement for this section. We currently require the
|
||
linker script to explicitly mention "*(.foo\$)".
|
||
FIXME: ppcpe.sc has .CRT\$foo in the .rdata section. According to the
|
||
Microsoft docs this isn't correct so it's not (currently) handled. */
|
||
|
||
ps[0] = '\$';
|
||
ps[1] = 0;
|
||
for (l = os->children.head; l; l = l->next)
|
||
{
|
||
if (l->header.type == lang_wild_statement_enum
|
||
&& strcmp (l->wild_statement.section_name, output_secname) == 0)
|
||
break;
|
||
}
|
||
ps[0] = 0;
|
||
if (l == NULL)
|
||
#if 1
|
||
einfo ("%P%F: *(%s\$) missing from linker script\n", output_secname);
|
||
#else /* FIXME: This block is untried. It exists to convey the intent,
|
||
should one decide to not require *(.foo\$) to appear in the linker
|
||
script. */
|
||
{
|
||
lang_wild_statement_type *new = new_stat (lang_wild_statement,
|
||
&os->children);
|
||
new->section_name = xmalloc (strlen (output_secname) + 2);
|
||
sprintf (new->section_name, "%s\$", output_secname);
|
||
new->filename = NULL;
|
||
lang_list_init (&new->children);
|
||
l = new;
|
||
}
|
||
#endif
|
||
|
||
/* Link the input section in and we're done for now.
|
||
The sections still have to be sorted, but that has to wait until
|
||
all such sections have been processed by us. The sorting is done by
|
||
sort_sections. */
|
||
wild_doit (&l->wild_statement.children, s, os, file);
|
||
|
||
return true;
|
||
}
|
||
|
||
static char *
|
||
gld_${EMULATION_NAME}_get_script(isfile)
|
||
int *isfile;
|
||
EOF
|
||
# Scripts compiled in.
|
||
# sed commands to quote an ld script as a C string.
|
||
sc="-f ${srcdir}/emultempl/stringify.sed"
|
||
|
||
cat >>e${EMULATION_NAME}.c <<EOF
|
||
{
|
||
*isfile = 0;
|
||
|
||
if (link_info.relocateable == true && config.build_constructors == true)
|
||
return
|
||
EOF
|
||
sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c
|
||
echo ' ; else if (link_info.relocateable == true) return' >> e${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
|
||
|
||
cat >>e${EMULATION_NAME}.c <<EOF
|
||
|
||
|
||
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation =
|
||
{
|
||
gld_${EMULATION_NAME}_before_parse,
|
||
syslib_default,
|
||
hll_default,
|
||
after_parse_default,
|
||
gld_${EMULATION_NAME}_after_open,
|
||
after_allocation_default,
|
||
set_output_arch_default,
|
||
ldemul_default_target,
|
||
gld_${EMULATION_NAME}_before_allocation,
|
||
gld_${EMULATION_NAME}_get_script,
|
||
"${EMULATION_NAME}",
|
||
"${OUTPUT_FORMAT}",
|
||
NULL, /* finish */
|
||
NULL, /* create output section statements */
|
||
NULL, /* open dynamic archive */
|
||
gld${EMULATION_NAME}_place_orphan,
|
||
gld_${EMULATION_NAME}_set_symbols,
|
||
gld_${EMULATION_NAME}_parse_args
|
||
};
|
||
EOF
|