# This shell script emits a C file. -*- C -*- # It does some substitutions. if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH} else OUTPUT_ARCH=${ARCH}:${MACHINE} fi cat >e${EMULATION_NAME}.c < based on generic.em. This file is part of GLD, the Gnu Linker. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define TARGET_IS_${EMULATION_NAME} #include "bfd.h" #include "sysdep.h" #include "bfdlink.h" #include "ld.h" #include "ldmain.h" #include "ldmisc.h" #include "ldexp.h" #include "ldlang.h" #include "ldfile.h" #include "ldemul.h" static void check_sections (bfd *, asection *, void *); static void gld${EMULATION_NAME}_before_parse (void) { #ifndef TARGET_ /* I.e., if not generic. */ ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); #endif /* not TARGET_ */ } /* This function is run after all the input files have been opened. We create a .rel.sdata section for each input file with a non zero .sdata section. The BFD backend will fill in these sections with magic numbers which can be used to relocate the data section at run time. This will only do the right thing if all the input files have been compiled using -membedded-pic. */ static void gld${EMULATION_NAME}_after_open (void) { bfd *abfd; if (! command_line.embedded_relocs || link_info.relocatable) return; for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) { asection *datasec; /* As first-order business, make sure that each input BFD is ECOFF. It better be, as we are directly calling an ECOFF backend function. */ if (bfd_get_flavour (abfd) != bfd_target_ecoff_flavour) einfo ("%F%B: all input objects must be ECOFF for --embedded-relocs\n"); datasec = bfd_get_section_by_name (abfd, ".sdata"); /* Note that we assume that the reloc_count field has already been set up. We could call bfd_get_reloc_upper_bound, but that returns the size of a memory buffer rather than a reloc count. We do not want to call bfd_canonicalize_reloc, because although it would always work it would force us to read in the relocs into BFD canonical form, which would waste a significant amount of time and memory. */ if (datasec != NULL && datasec->reloc_count > 0) { asection *relsec; relsec = bfd_make_section (abfd, ".rel.sdata"); if (relsec == NULL || ! bfd_set_section_flags (abfd, relsec, (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY)) || ! bfd_set_section_alignment (abfd, relsec, 2) || ! bfd_set_section_size (abfd, relsec, datasec->reloc_count * 4)) einfo ("%F%B: can not create .rel.sdata section: %E\n"); } /* Double check that all other data sections are empty, as is required for embedded PIC code. */ bfd_map_over_sections (abfd, check_sections, datasec); } } /* Check that of the data sections, only the .sdata section has relocs. This is called via bfd_map_over_sections. */ static void check_sections (bfd *abfd, asection *sec, void *sdatasec) { if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0 && sec != sdatasec && sec->reloc_count != 0) einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n", abfd, bfd_get_section_name (abfd, sec)); } /* This function is called after the section sizes and offsets have been set. If we are generating embedded relocs, it calls a special BFD backend routine to do the work. */ static void gld${EMULATION_NAME}_after_allocation (void) { bfd *abfd; if (! command_line.embedded_relocs || link_info.relocatable) return; for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) { asection *datasec, *relsec; char *errmsg; datasec = bfd_get_section_by_name (abfd, ".sdata"); if (datasec == NULL || datasec->reloc_count == 0) continue; relsec = bfd_get_section_by_name (abfd, ".rel.sdata"); ASSERT (relsec != NULL); if (! bfd_mips_ecoff_create_embedded_relocs (abfd, &link_info, datasec, relsec, &errmsg)) { if (errmsg == NULL) einfo ("%B%X: can not create runtime reloc information: %E\n", abfd); else einfo ("%X%B: can not create runtime reloc information: %s\n", abfd, errmsg); } } } static char * gld${EMULATION_NAME}_get_script (int *isfile) EOF if test -n "$COMPILE_IN" then # Scripts compiled in. # sed commands to quote an ld script as a C string. sc="-f stringify.sed" cat >>e${EMULATION_NAME}.c <> e${EMULATION_NAME}.c echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c echo ' ; else return' >> e${EMULATION_NAME}.c sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c echo '; }' >> e${EMULATION_NAME}.c else # Scripts read from the filesystem. cat >>e${EMULATION_NAME}.c <>e${EMULATION_NAME}.c <