diff options
Diffstat (limited to 'ld/ldwrite.c')
| -rw-r--r-- | ld/ldwrite.c | 390 |
1 files changed, 50 insertions, 340 deletions
diff --git a/ld/ldwrite.c b/ld/ldwrite.c index fc7759f..c073263 100644 --- a/ld/ldwrite.c +++ b/ld/ldwrite.c @@ -1,5 +1,5 @@ /* Copyright (C) 1991 Free Software Foundation, Inc. - + This file is part of GLD, the Gnu Linker. This program is free software; you can redistribute it and/or modify @@ -17,15 +17,11 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* - * $Id$ -*/ - -/* This module writes out the final image by reading sections from the input files, relocating them and writing them out There are two main paths through this module, one for normal - operation and one for partial linking. + operation and one for partial linking. During normal operation, raw section data is read along with the associated relocation information, the relocation info applied and @@ -35,7 +31,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ out how big the output relocation vector will be. Then raw data is read, relocated and written section by section. - Written by Steve Chamberlain steve@cygnus.com + Written by Steve Chamberlain sac@cygnus.com */ @@ -43,372 +39,86 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "bfd.h" #include "sysdep.h" -#include "ldlang.h" #include "ld.h" +#include "ldexp.h" +#include "ldlang.h" #include "ldwrite.h" #include "ldmisc.h" #include "ldsym.h" #include "ldgram.h" - - - - -/* Static vars for do_warnings and subroutines of it */ -int list_unresolved_refs; /* List unresolved refs */ -int list_warning_symbols; /* List warning syms */ -int list_multiple_defs; /* List multiple definitions */ -extern int errno; -extern char *sys_errlist[]; - -extern unsigned int undefined_global_sym_count; - -extern bfd *output_bfd; - -extern struct lang_output_section_statement_struct * create_object_symbols; - -extern char lprefix; - -#ifdef __STDC__ -void lang_for_each_statement(void (*func)()); -#else /* __STDC__ */ -void lang_for_each_statement(); -#endif /* __STDC__ */ - -extern bfd_size_type largest_section; -ld_config_type config; - -extern unsigned int global_symbol_count; - -boolean trace_files; - -static void -DEFUN(perform_relocation,(input_bfd, - input_section, - data, - symbols), - bfd *input_bfd AND - asection *input_section AND - PTR data AND - asymbol **symbols) -{ - static asymbol *error_symbol = (asymbol *)NULL; - static unsigned int error_count = 0; -#define MAX_ERRORS_IN_A_ROW 5 - bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd, input_section); - - arelent **reloc_vector = (arelent **)ldmalloc(reloc_size); - arelent **parent; - bfd *ob = output_bfd; - asection *os = input_section->output_section; - if (config.relocateable_output == false) ob = (bfd *)NULL; - - input_section->_cooked_size = input_section->_raw_size; - input_section->reloc_done = 1; - - if (bfd_canonicalize_reloc(input_bfd, - input_section, - reloc_vector, - symbols) ) - { - for (parent = reloc_vector; *parent; parent++) - { - - bfd_reloc_status_type r= - bfd_perform_relocation(input_bfd, - *parent, - data, - input_section, - ob); - - if (r == bfd_reloc_ok) { - if (ob != (bfd *)NULL) { - /* A parital link, so keep the relocs */ - - /* Add to each relocation the offset of where it lives - in the output section */ -/* (*parent)->address += input_section->output_offset;*/ - - os->orelocation[os->reloc_count] = *parent; - os->reloc_count++; - } - } - else - { - asymbol *s; - arelent *p = *parent; - - if (ob != (bfd *)NULL) { - /* A parital link, so keep the relocs */ - os->orelocation[os->reloc_count] = *parent; - os->reloc_count++; - } - - if (p->sym_ptr_ptr != (asymbol **)NULL) { - s = *(p->sym_ptr_ptr); - } - else { - s = (asymbol *)NULL; - } - switch (r) - { - case bfd_reloc_undefined: - /* We remember the symbol, and never print more than - a reasonable number of them in a row */ - if (s == error_symbol) { - error_count++; - } - else { - error_count = 0; - error_symbol = s; - } - if (error_count < MAX_ERRORS_IN_A_ROW) { - einfo("%C: undefined reference to `%T'\n", - input_bfd, input_section, symbols, - (*parent)->address, s); - config.make_executable = false; - } - else if (error_count == MAX_ERRORS_IN_A_ROW) { - einfo("%C: more undefined references to `%T' follow\n", - input_bfd, input_section, - symbols, (*parent)->address, s); - } - else { - /* Don't print any more */ - } - break; - case bfd_reloc_dangerous: - einfo("%B: relocation may be wrong `%T'\n", - input_bfd, s); - break; - case bfd_reloc_outofrange: - einfo("%B:%s relocation address out of range %T (%V)\n", - input_bfd, input_section->name, s, p->address); - break; - case bfd_reloc_overflow: - einfo("%B:%s relocation overflow in %T reloc type %d\n", - input_bfd, input_section->name, s, p->howto->type); - break; - default: - einfo("%F%B: relocation error, symbol `%T'\n", - input_bfd, s); - break; - } - } - } - } - free((char *)reloc_vector); -} - - - - - - -PTR data_area; +#include "ldmain.h" +#include "relax.h" static void -DEFUN(copy_and_relocate,(statement), - lang_statement_union_type *statement) -{ - switch (statement->header.type) { - case lang_fill_statement_enum: - { -#if 0 - bfd_byte play_area[SHORT_SIZE]; - unsigned int i; - bfd_putshort(output_bfd, statement->fill_statement.fill, play_area); - /* Write out all entire shorts */ - for (i = 0; - i < statement->fill_statement.size - SHORT_SIZE + 1; - i+= SHORT_SIZE) - { - bfd_set_section_contents(output_bfd, - statement->fill_statement.output_section, - play_area, - statement->data_statement.output_offset +i, - SHORT_SIZE); - - } - - /* Now write any remaining byte */ - if (i < statement->fill_statement.size) - { - bfd_set_section_contents(output_bfd, - statement->fill_statement.output_section, - play_area, - statement->data_statement.output_offset +i, - 1); - - } -#endif - } - break; - case lang_data_statement_enum: - { - bfd_vma value = statement->data_statement.value; - bfd_byte play_area[LONG_SIZE]; - unsigned int size = 0; - switch (statement->data_statement.type) { - case LONG: - bfd_put_32(output_bfd, value, play_area); - size = LONG_SIZE; - break; - case SHORT: - bfd_put_16(output_bfd, value, play_area); - size = SHORT_SIZE; - break; - case BYTE: - bfd_put_8(output_bfd, value, play_area); - size = BYTE_SIZE; - break; - } - - bfd_set_section_contents(output_bfd, - statement->data_statement.output_section, - play_area, - statement->data_statement.output_vma, - size); - - - - - } - break; - case lang_input_section_enum: - { - - asection *i = statement->input_section.section; - asection *output_section = i->output_section; - lang_input_statement_type *ifile = - statement->input_section.ifile; - if (ifile->just_syms_flag == false) { - bfd *inbfd = ifile->the_bfd; - - if (output_section->flags & SEC_LOAD && - output_section->flags & SEC_ALLOC - && bfd_get_section_size_before_reloc(i) != 0) - { - if(bfd_get_section_contents(inbfd, - i, - data_area, - (file_ptr)0, - bfd_get_section_size_before_reloc(i)) == false) - { - einfo("%F%B error reading section contents %E\n", inbfd); - } - /* Set the reloc bit */ - perform_relocation (inbfd, i, data_area, ifile->asymbols); - - - if(bfd_set_section_contents(output_bfd, - output_section, - data_area, - (file_ptr)i->output_offset, - bfd_get_section_size_after_reloc(i)) == false) - { - einfo("%F%B error writing section contents of %E\n", - output_bfd); - } - - } - } - - } - break; - - default: - /* All the other ones fall through */ - ; - - } -} - -void -DEFUN_VOID(write_norel) -{ - /* Output the text and data segments, relocating as we go. */ - lang_for_each_statement(copy_and_relocate); -} - - -static void -DEFUN(read_relocs,(abfd, section, symbols), - bfd *abfd AND - asection *section AND - asymbol **symbols) +read_relocs (abfd, section, symbols) + bfd * abfd; + asection * section; + asymbol ** symbols; { /* Work out the output section ascociated with this input section */ asection *output_section = section->output_section; - bfd_size_type reloc_size = bfd_get_reloc_upper_bound(abfd, section); - arelent **reloc_vector = (arelent **)ldmalloc(reloc_size); + bfd_size_type reloc_size = bfd_get_reloc_upper_bound (abfd, section); + arelent **reloc_vector = (arelent **) ldmalloc (reloc_size); - if (bfd_canonicalize_reloc(abfd, - section, - reloc_vector, - symbols)) { - output_section->reloc_count += section->reloc_count; - } + if (bfd_canonicalize_reloc (abfd, + section, + reloc_vector, + symbols)) + { + output_section->reloc_count += section->reloc_count; + } } -static void -DEFUN_VOID(write_rel) +static void +setup_rel () { /* - Run through each section of each file and work work out the total - number of relocation records which will finally be in each output - section - */ + Run through each section of each file and work work out the total + number of relocation records which will finally be in each output + section + */ LANG_FOR_EACH_INPUT_SECTION - (statement, abfd, section, - (read_relocs(abfd, section, statement->asymbols))); + (statement, abfd, section, + (read_relocs (abfd, section, statement->asymbols))); /* - Now run though all the output sections and allocate the space for - all the relocations - */ + Now run though all the output sections and allocate the space for + all the relocations + */ LANG_FOR_EACH_OUTPUT_SECTION - (section, + (section, (section->orelocation = - (arelent **)ldmalloc((bfd_size_type)(sizeof(arelent **)* - section->reloc_count)), - section->reloc_count = 0, - section->flags |= SEC_HAS_CONTENTS)); - - - /* - Copy the data, relocating as we go - */ - lang_for_each_statement(copy_and_relocate); + (arelent **) ldmalloc ((bfd_size_type) (sizeof (arelent **) * + section->reloc_count)), + section->reloc_count = 0)); } void -DEFUN_VOID(ldwrite) +ldwrite () { - data_area = (PTR) ldmalloc(largest_section); + PTR data_area = (PTR) ldmalloc (largest_section); + + ldsym_write (); + if (config.relocateable_output == true) - { - write_rel(); - } - else - { - write_relaxnorel(output_bfd); - } - free(data_area); + setup_rel (); + + write_relax (output_bfd, data_area, config.relocateable_output); + + free (data_area); + /* Output the symbol table (both globals and locals). */ - /* Print a map, if requested. */ + /* Print a map, if requested and possible. */ - if (config.map_file) { + if (config.map_file) + { ldsym_print_symbol_table (); - lang_map(); + lang_map (); } - - ldsym_write (); - } - |