linux.em revision 218822
1242123Sdteske# This shell script emits a C file. -*- C -*- 2242123Sdteske# It does some substitutions. 3242123Sdteskeif [ -z "$MACHINE" ]; then 4242123Sdteske OUTPUT_ARCH=${ARCH} 5242123Sdteskeelse 6242123Sdteske OUTPUT_ARCH=${ARCH}:${MACHINE} 7242123Sdteskefi 8242123Sdteskecat >e${EMULATION_NAME}.c <<EOF 9242123Sdteske/* This file is is generated by a shell script. DO NOT EDIT! */ 10242123Sdteske 11242123Sdteske/* Linux a.out emulation code for ${EMULATION_NAME} 12242123Sdteske Copyright 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 13242123Sdteske 2003, 2004, 2005, 2007 Free Software Foundation, Inc. 14242123Sdteske Written by Steve Chamberlain <sac@cygnus.com> 15242123Sdteske Linux support by Eric Youngdale <ericy@cais.cais.com> 16242123Sdteske 17242123SdteskeThis file is part of GLD, the Gnu Linker. 18242123Sdteske 19242123SdteskeThis program is free software; you can redistribute it and/or modify 20242123Sdteskeit under the terms of the GNU General Public License as published by 21242123Sdteskethe Free Software Foundation; either version 2 of the License, or 22242123Sdteske(at your option) any later version. 23242123Sdteske 24242123SdteskeThis program is distributed in the hope that it will be useful, 25242123Sdteskebut WITHOUT ANY WARRANTY; without even the implied warranty of 26242123SdteskeMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27242123SdteskeGNU General Public License for more details. 28242123Sdteske 29242123SdteskeYou should have received a copy of the GNU General Public License 30242123Sdteskealong with this program; if not, write to the Free Software 31242123SdteskeFoundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 32242123Sdteske 33242123Sdteske#define TARGET_IS_${EMULATION_NAME} 34242123Sdteske 35242123Sdteske#include "sysdep.h" 36242123Sdteske#include "bfd.h" 37242123Sdteske#include "bfdlink.h" 38242123Sdteske 39242123Sdteske#include "ld.h" 40242123Sdteske#include "ldmain.h" 41242123Sdteske#include "ldmisc.h" 42242123Sdteske#include "ldexp.h" 43242123Sdteske#include "ldlang.h" 44242123Sdteske#include "ldfile.h" 45242123Sdteske#include "ldemul.h" 46242123Sdteske 47242123Sdteskestatic void 48242123Sdteskegld${EMULATION_NAME}_before_parse (void) 49242123Sdteske{ 50242123Sdteske ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); 51242123Sdteske config.dynamic_link = TRUE; 52242123Sdteske config.has_shared = TRUE; 53242123Sdteske} 54242123Sdteske 55242123Sdteske/* Try to open a dynamic archive. This is where we know that Linux 56242123Sdteske dynamic libraries have an extension of .sa. */ 57242123Sdteske 58242123Sdteskestatic bfd_boolean 59242123Sdteskegld${EMULATION_NAME}_open_dynamic_archive 60242123Sdteske (const char *arch, search_dirs_type *search, lang_input_statement_type *entry) 61242123Sdteske{ 62242123Sdteske char *string; 63242123Sdteske 64242123Sdteske if (! entry->is_archive) 65242123Sdteske return FALSE; 66242123Sdteske 67242123Sdteske string = (char *) xmalloc (strlen (search->name) 68242123Sdteske + strlen (entry->filename) 69242123Sdteske + strlen (arch) 70242123Sdteske + sizeof "/lib.sa"); 71242123Sdteske 72242123Sdteske sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch); 73242123Sdteske 74242123Sdteske if (! ldfile_try_open_bfd (string, entry)) 75242123Sdteske { 76242123Sdteske free (string); 77 return FALSE; 78 } 79 80 entry->filename = string; 81 82 return TRUE; 83} 84 85/* This is called by the create_output_section_statements routine via 86 lang_for_each_statement. It locates any address assignment to 87 .text, and modifies it to include the size of the headers. This 88 causes -Ttext to mean the starting address of the header, rather 89 than the starting address of .text, which is compatible with other 90 Linux tools. */ 91 92static void 93gld${EMULATION_NAME}_find_address_statement (lang_statement_union_type *s) 94{ 95 if (s->header.type == lang_address_statement_enum 96 && strcmp (s->address_statement.section_name, ".text") == 0) 97 { 98 ASSERT (s->address_statement.address->type.node_class == etree_value); 99 s->address_statement.address->value.value += 0x20; 100 } 101} 102 103/* This is called before opening the input BFD's. */ 104 105static void 106gld${EMULATION_NAME}_create_output_section_statements (void) 107{ 108 lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement); 109} 110 111/* This is called after the sections have been attached to output 112 sections, but before any sizes or addresses have been set. */ 113 114static void 115gld${EMULATION_NAME}_before_allocation (void) 116{ 117 if (link_info.relocatable) 118 return; 119 120 /* Let the backend work out the sizes of any sections required by 121 dynamic linking. */ 122 if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info)) 123 einfo ("%P%F: failed to set dynamic section sizes: %E\n"); 124 125 before_allocation_default (); 126} 127 128static char * 129gld${EMULATION_NAME}_get_script (int *isfile) 130EOF 131 132if test -n "$COMPILE_IN" 133then 134# Scripts compiled in. 135 136# sed commands to quote an ld script as a C string. 137sc="-f stringify.sed" 138 139cat >>e${EMULATION_NAME}.c <<EOF 140{ 141 *isfile = 0; 142 143 if (link_info.relocatable && config.build_constructors) 144 return 145EOF 146sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c 147echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c 148sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c 149echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c 150sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c 151echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c 152sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c 153echo ' ; else return' >> e${EMULATION_NAME}.c 154sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c 155echo '; }' >> e${EMULATION_NAME}.c 156 157else 158# Scripts read from the filesystem. 159 160cat >>e${EMULATION_NAME}.c <<EOF 161{ 162 *isfile = 1; 163 164 if (link_info.relocatable && config.build_constructors) 165 return "ldscripts/${EMULATION_NAME}.xu"; 166 else if (link_info.relocatable) 167 return "ldscripts/${EMULATION_NAME}.xr"; 168 else if (!config.text_read_only) 169 return "ldscripts/${EMULATION_NAME}.xbn"; 170 else if (!config.magic_demand_paged) 171 return "ldscripts/${EMULATION_NAME}.xn"; 172 else 173 return "ldscripts/${EMULATION_NAME}.x"; 174} 175EOF 176 177fi 178 179cat >>e${EMULATION_NAME}.c <<EOF 180 181struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 182{ 183 gld${EMULATION_NAME}_before_parse, 184 syslib_default, 185 hll_default, 186 after_parse_default, 187 after_open_default, 188 after_allocation_default, 189 set_output_arch_default, 190 ldemul_default_target, 191 gld${EMULATION_NAME}_before_allocation, 192 gld${EMULATION_NAME}_get_script, 193 "${EMULATION_NAME}", 194 "${OUTPUT_FORMAT}", 195 finish_default, 196 gld${EMULATION_NAME}_create_output_section_statements, 197 gld${EMULATION_NAME}_open_dynamic_archive, 198 NULL, /* place orphan */ 199 NULL, /* set symbols */ 200 NULL, /* parse args */ 201 NULL, /* add_options */ 202 NULL, /* handle_option */ 203 NULL, /* unrecognized file */ 204 NULL, /* list options */ 205 NULL, /* recognized file */ 206 NULL, /* find_potential_libraries */ 207 NULL /* new_vers_pattern */ 208}; 209EOF 210