home *** CD-ROM | disk | FTP | other *** search
- # This shell script emits a C file. -*- C -*-
- # It does some substitutions.
- cat >e${EMULATION_NAME}.c <<EOF
- /* For WINDOWS_NT */
- /* The original file generated returned different default scripts depending
- on whether certain switches were set, but these switches pertain to the
- Linux system and that particular version of coff. In the NT case, we
- only determine if the subsystem is console or windows in order to select
- the correct entry point by default. */
-
-
- /* This file is part of GLD, the Gnu Linker.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
- #include "bfd.h"
- #include "sysdep.h"
- #include "bfdlink.h"
- #include "getopt.h"
- #include "ld.h"
- #include "ld.h"
- #include "ldmain.h"
- #include "ldgram.h"
- #include "ldexp.h"
- #include "ldlang.h"
- #include "ldemul.h"
- #include "ldlex.h"
- #include "ldmisc.h"
- #include "ldctor.h"
- #include "ldfile.h"
- #include "coff/internal.h"
- #include "../bfd/libcoff.h"
-
- #define TARGET_IS_${EMULATION_NAME}
-
- static void gld_${EMULATION_NAME}_set_symbols PARAMS ((void));
- static void gld_${EMULATION_NAME}_after_open PARAMS ((void));
- static void gld_${EMULATION_NAME}_before_parse PARAMS ((void));
- static void gld_${EMULATION_NAME}_before_allocation PARAMS ((void));
- static boolean gld${EMULATION_NAME}_place_orphan
- PARAMS ((lang_input_statement_type *, asection *));
- static char *gld_${EMULATION_NAME}_get_script PARAMS ((int *));
- static int gld_${EMULATION_NAME}_parse_args PARAMS ((int, char **));
-
- #if 0 /* argument to qsort so don't prototype */
- static int sort_by_file_name PARAMS ((void *, void *));
- static int sort_by_section_name PARAMS ((void *, void *));
- #endif
- static lang_statement_union_type **sort_sections_1
- PARAMS ((lang_statement_union_type **, lang_statement_union_type *, int,
- int (*)()));
- static void sort_sections PARAMS ((lang_statement_union_type *));
-
- static struct internal_extra_pe_aouthdr pe;
- static int dll;
-
- static void
- gld_${EMULATION_NAME}_before_parse()
- {
- ldfile_output_architecture = bfd_arch_${ARCH};
- }
-
- /* PE format extra command line options. */
-
- /* Used for setting flags in the PE header. */
- #define OPTION_BASE_FILE (300 + 1)
- #define OPTION_DLL (OPTION_BASE_FILE + 1)
- #define OPTION_FILE_ALIGNMENT (OPTION_DLL + 1)
- #define OPTION_IMAGE_BASE (OPTION_FILE_ALIGNMENT + 1)
- #define OPTION_MAJOR_IMAGE_VERSION (OPTION_IMAGE_BASE + 1)
- #define OPTION_MAJOR_OS_VERSION (OPTION_MAJOR_IMAGE_VERSION + 1)
- #define OPTION_MAJOR_SUBSYSTEM_VERSION (OPTION_MAJOR_OS_VERSION + 1)
- #define OPTION_MINOR_IMAGE_VERSION (OPTION_MAJOR_SUBSYSTEM_VERSION + 1)
- #define OPTION_MINOR_OS_VERSION (OPTION_MINOR_IMAGE_VERSION + 1)
- #define OPTION_MINOR_SUBSYSTEM_VERSION (OPTION_MINOR_OS_VERSION + 1)
- #define OPTION_SECTION_ALIGNMENT (OPTION_MINOR_SUBSYSTEM_VERSION + 1)
- #define OPTION_STACK (OPTION_SECTION_ALIGNMENT + 1)
- #define OPTION_SUBSYSTEM (OPTION_STACK + 1)
- #define OPTION_HEAP (OPTION_SUBSYSTEM + 1)
-
- static struct option longopts[] = {
- /* PE options */
- {"base-file", required_argument, NULL, OPTION_BASE_FILE},
- {"dll", no_argument, NULL, OPTION_DLL},
- {"file-alignment", required_argument, NULL, OPTION_FILE_ALIGNMENT},
- {"heap", required_argument, NULL, OPTION_HEAP},
- {"image-base", required_argument, NULL, OPTION_IMAGE_BASE},
- {"major-image-version", required_argument, NULL, OPTION_MAJOR_IMAGE_VERSION},
- {"major-os-version", required_argument, NULL, OPTION_MAJOR_OS_VERSION},
- {"major-subsystem-version", required_argument, NULL, OPTION_MAJOR_SUBSYSTEM_VERSION},
- {"minor-image-version", required_argument, NULL, OPTION_MINOR_IMAGE_VERSION},
- {"minor-os-version", required_argument, NULL, OPTION_MINOR_OS_VERSION},
- {"minor-subsystem-version", required_argument, NULL, OPTION_MINOR_SUBSYSTEM_VERSION},
- {"section-alignment", required_argument, NULL, OPTION_SECTION_ALIGNMENT},
- {"stack", required_argument, NULL, OPTION_STACK},
- {"subsystem", required_argument, NULL, OPTION_SUBSYSTEM},
- {NULL, no_argument, NULL, 0}
- };
-
-
- /* PE/WIN32; added routines to get the subsystem type, heap and/or stack
- parameters which may be input from the command line */
-
- typedef struct {
- void *ptr;
- int size;
- int value;
- char *symbol;
- int inited;
- } definfo;
-
- #define D(field,symbol,def) {&pe.field,sizeof(pe.field), def, symbol,0}
-
- static definfo init[] =
- {
- /* imagebase must be first */
- #define IMAGEBASEOFF 0
- D(ImageBase,"__image_base__", NT_EXE_IMAGE_BASE),
- #define DLLOFF 1
- {&dll, sizeof(dll), 0, "__dll__"},
- D(SectionAlignment,"__section_alignment__", PE_DEF_SECTION_ALIGNMENT),
- D(FileAlignment,"__file_alignment__", PE_DEF_FILE_ALIGNMENT),
- D(MajorOperatingSystemVersion,"__major_os_version__", 4),
- D(MinorOperatingSystemVersion,"__minor_os_version__", 0),
- D(MajorImageVersion,"__major_image_version__", 1),
- D(MinorImageVersion,"__minor_image_version__", 0),
- D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
- D(MinorSubsystemVersion,"__minor_subsystem_version__", 0),
- D(Subsystem,"__subsystem__", 3),
- D(SizeOfStackReserve,"__size_of_stack_reserve__", 0x100000),
- D(SizeOfStackCommit,"__size_of_stack_commit__", 0x1000),
- D(SizeOfHeapReserve,"__size_of_heap_reserve__", 0x100000),
- D(SizeOfHeapCommit,"__size_of_heap_commit__", 0x1000),
- D(LoaderFlags,"__loader_flags__", 0x0),
- 0
- };
-
-
- static void
- set_pe_name (name, val)
- char *name;
- long val;
- {
- int i;
- /* Find the name and set it. */
- for (i = 0; init[i].ptr; i++)
- {
- if (strcmp (name, init[i].symbol) == 0)
- {
- init[i].value = val;
- init[i].inited = 1;
- return;
- }
- }
- abort();
- }
-
-
- static void
- set_pe_subsystem ()
- {
- int i;
- static struct
- {
- char *name ;
- int value;
- }
- v[] =
- {
- {"native", 1},
- {"windows",2},
- {"console",3},
- {"os2",5},
- {"posix", 7},
- {0,0}
- };
-
- for (i = 0; v[i].name; i++)
- {
- if (!strcmp (optarg, v[i].name))
- {
- set_pe_name ("__subsystem__", v[i].value);
- return;
- }
- }
- einfo ("%P%F: invalid subsystem type %s\n", optarg);
- }
-
-
-
- static void
- set_pe_value (name)
- char *name;
-
- {
- char *end;
- set_pe_name (name, strtoul (optarg, &end, 0));
- if (end == optarg)
- {
- einfo ("%P%F: invalid hex number for PE parameter '%s'\n", optarg);
- }
-
- optarg = end;
- }
-
- static void
- set_pe_stack_heap (resname, comname)
- char *resname;
- char *comname;
- {
- char *begin_commit;
- char *end;
-
- set_pe_value (resname);
- if (*optarg == ',')
- {
- optarg++;
- set_pe_value (comname);
- }
- else if (*optarg)
- {
- einfo ("%P%F: strange hex info for PE parameter '%s'\n", optarg);
- }
- }
-
-
-
- static int
- gld_${EMULATION_NAME}_parse_args(argc, argv)
- int argc;
- char **argv;
- {
- int longind;
- int optc;
- int prevoptind = optind;
- int prevopterr = opterr;
- int wanterror;
- static int lastoptind = -1;
-
- if (lastoptind != optind)
- opterr = 0;
- wanterror = opterr;
-
- lastoptind = optind;
-
- optc = getopt_long_only (argc, argv, "-", longopts, &longind);
- opterr = prevopterr;
-
- switch (optc)
- {
- default:
- if (wanterror)
- xexit (1);
- optind = prevoptind;
- return 0;
-
- case OPTION_BASE_FILE:
- link_info.base_file = (PTR) fopen (optarg, FOPEN_WB);
- if (link_info.base_file == NULL)
- {
- fprintf (stderr, "%s: Can't open base file %s\n",
- program_name, optarg);
- xexit (1);
- }
- break;
-
- /* PE options */
- case OPTION_HEAP:
- set_pe_stack_heap ("__size_of_heap_reserve__", "__size_of_heap_commit__");
- break;
- case OPTION_STACK:
- set_pe_stack_heap ("__size_of_stack_reserve__", "__size_of_stack_commit__");
- break;
- case OPTION_SUBSYSTEM:
- set_pe_subsystem ();
- break;
- case OPTION_MAJOR_OS_VERSION:
- set_pe_value ("__major_os_version__");
- break;
- case OPTION_MINOR_OS_VERSION:
- set_pe_value ("__minor_os_version__");
- break;
- case OPTION_MAJOR_SUBSYSTEM_VERSION:
- set_pe_value ("__major_subsystem_version__");
- break;
- case OPTION_MINOR_SUBSYSTEM_VERSION:
- set_pe_value ("__minor_subsystem_version__");
- break;
- case OPTION_MAJOR_IMAGE_VERSION:
- set_pe_value ("__major_image_version__");
- break;
- case OPTION_MINOR_IMAGE_VERSION:
- set_pe_value ("__minor_image_version__");
- break;
- case OPTION_FILE_ALIGNMENT:
- set_pe_value ("__file_alignment__");
- break;
- case OPTION_SECTION_ALIGNMENT:
- set_pe_value ("__section_alignment__");
- break;
- case OPTION_DLL:
- set_pe_name ("__dll__", 1);
- break;
- case OPTION_IMAGE_BASE:
- set_pe_value ("__image_base__");
- break;
- }
- return 1;
- }
-
- static void
- gld_${EMULATION_NAME}_set_symbols()
- {
- /* Run through and invent symbols for all the
- names and insert the defaults. */
- int j;
- lang_statement_list_type *save;
-
- if (!init[IMAGEBASEOFF].inited)
- init[IMAGEBASEOFF].value = init[DLLOFF].value
- ? NT_DLL_IMAGE_BASE : NT_EXE_IMAGE_BASE;
-
- /* Glue the assignments into the abs section */
- save = stat_ptr;
-
- stat_ptr = &(abs_output_section->children);
-
- for (j = 0; init[j].ptr; j++)
- {
- long val = init[j].value;
- lang_add_assignment (exp_assop ('=' ,init[j].symbol, exp_intop (val)));
- if (init[j].size == sizeof(short))
- *(short *)init[j].ptr = val;
- else if (init[j].size == sizeof(int))
- *(int *)init[j].ptr = val;
- else if (init[j].size == sizeof(long))
- *(long *)init[j].ptr = val;
- else abort();
- }
- /* Restore the pointer. */
- stat_ptr = save;
-
- if (pe.FileAlignment >
- pe.SectionAlignment)
- {
- einfo ("%P: warning, file alignment > section alignment.\n");
- }
- }
-
- static void
- gld_${EMULATION_NAME}_after_open()
- {
- /* Pass the wacky PE command line options into the output bfd */
- struct internal_extra_pe_aouthdr *i;
- if (!coff_data(output_bfd)->pe)
- {
- einfo ("%F%P: PE operations on non PE file.\n");
- }
-
- pe_data(output_bfd)->pe_opthdr = pe;
- pe_data(output_bfd)->dll = init[DLLOFF].value;
-
- }
-
- /* Callback functions for qsort in sort_sections. */
-
- static int
- sort_by_file_name (a, b)
- void *a;
- void *b;
- {
- lang_statement_union_type **ra = a;
- lang_statement_union_type **rb = b;
- return strcmp ((*ra)->input_section.ifile->filename,
- (*rb)->input_section.ifile->filename);
- }
-
- static int
- sort_by_section_name (a, b)
- void *a;
- void *b;
- {
- lang_statement_union_type **ra = a;
- lang_statement_union_type **rb = b;
- return strcmp ((*ra)->input_section.section->name,
- (*rb)->input_section.section->name);
- }
-
- /* Subroutine of sort_sections to a contiguous subset of a list of sections.
- NEXT_AFTER is the element after the last one to sort.
- The result is a pointer to the last element's "next" pointer. */
-
- static lang_statement_union_type **
- sort_sections_1 (startptr, next_after, count, sort_func)
- lang_statement_union_type **startptr,*next_after;
- int count;
- int (*sort_func) ();
- {
- lang_statement_union_type **vec;
- lang_statement_union_type *p;
- int i;
-
- if (count == 0)
- return startptr;
-
- vec = (lang_statement_union_type **)
- alloca (count * sizeof (lang_statement_union_type *));
-
- for (p = *startptr, i = 0; i < count; i++, p = p->next)
- vec[i] = p;
-
- qsort (vec, count, sizeof (vec[0]), sort_func);
-
- /* Fill in the next pointers again. */
- *startptr = vec[0];
- for (i = 0; i < count - 1; i++)
- vec[i]->header.next = vec[i + 1];
- vec[i]->header.next = next_after;
- return &(vec[i]->header.next);
- }
-
- /* Sort the .idata\$foo input sections of archives into filename order.
- The reason is so dlltool can arrange to have the pe dll import information
- generated correctly - the head of the list goes into dh.o, the tail into
- dt.o, and the guts into ds[nnnn].o. Note that this is only needed for the
- .idata section.
- FIXME: This may no longer be necessary with grouped sections. Instead of
- sorting on dh.o, ds[nnnn].o, dt.o, one could, for example, have dh.o use
- .idata\$4h, have ds[nnnn].o use .idata\$4s[nnnn], and have dt.o use .idata\$4t.
- This would have to be elaborated upon to handle multiple dll's
- [assuming such an eloboration is possible of course].
-
- We also sort sections in '\$' wild statements. These are created by the
- place_orphans routine to implement grouped sections. */
-
- static void
- sort_sections (s)
- lang_statement_union_type *s;
- {
- for (; s ; s = s->next)
- switch (s->header.type)
- {
- case lang_output_section_statement_enum:
- sort_sections (s->output_section_statement.children.head);
- break;
- case lang_wild_statement_enum:
- {
- lang_statement_union_type **p = &s->wild_statement.children.head;
-
- /* Is this the .idata section? */
- if (s->wild_statement.section_name != NULL
- && strncmp (s->wild_statement.section_name, ".idata", 6) == 0)
- {
- /* Sort any children in the same archive. Run through all
- the children of this wild statement, when an
- input_section in an archive is found, scan forward to
- find all input_sections which are in the same archive.
- Sort them by their filename and then re-thread the
- pointer chain. */
-
- while (*p)
- {
- lang_statement_union_type *start = *p;
- 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_${EMULATION_NAME}_before_allocation()
- {
- extern lang_statement_list_type *stat_ptr;
-
- #ifdef TARGET_IS_ppcpe
- /* Here we rummage through the found bfds to collect toc information */
- {
- LANG_FOR_EACH_INPUT_STATEMENT (is)
- {
- ppc_process_before_allocation(is->the_bfd, &link_info);
- }
- }
-
- /* We have seen it all. Allocate it, and carry on */
- ppc_allocate_toc_section (&link_info);
- #endif
-
- sort_sections (stat_ptr->head);
- }
-
- /* Place an orphan section. We use this to put sections with a '\$' in them
- into the right place. Any section with a '\$' in them (e.g. .text\$foo)
- gets mapped to the output section with everything from the '\$' on stripped
- (e.g. .text).
- See the Microsoft Portable Executable and Common Object File Format
- Specification 4.1, section 4.2, Grouped Sections. */
-
- /*ARGSUSED*/
- static boolean
- gld${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
-