linux.em revision 33965
1# This shell script emits a C file. -*- C -*- 2# It does some substitutions. 3cat >e${EMULATION_NAME}.c <<EOF 4/* This file is is generated by a shell script. DO NOT EDIT! */ 5 6/* Linux a.out emulation code for ${EMULATION_NAME} 7 Copyright (C) 1991, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. 8 Written by Steve Chamberlain <sac@cygnus.com> 9 Linux support by Eric Youngdale <ericy@cais.cais.com> 10 11This file is part of GLD, the Gnu Linker. 12 13This program is free software; you can redistribute it and/or modify 14it under the terms of the GNU General Public License as published by 15the Free Software Foundation; either version 2 of the License, or 16(at your option) any later version. 17 18This program is distributed in the hope that it will be useful, 19but WITHOUT ANY WARRANTY; without even the implied warranty of 20MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21GNU General Public License for more details. 22 23You should have received a copy of the GNU General Public License 24along with this program; if not, write to the Free Software 25Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 26 27#define TARGET_IS_${EMULATION_NAME} 28 29#include "bfd.h" 30#include "sysdep.h" 31#include "bfdlink.h" 32 33#include "ld.h" 34#include "ldmain.h" 35#include "ldemul.h" 36#include "ldfile.h" 37#include "ldmisc.h" 38#include "ldexp.h" 39#include "ldlang.h" 40 41static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); 42static boolean gld${EMULATION_NAME}_open_dynamic_archive 43 PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *)); 44static void gld${EMULATION_NAME}_find_address_statement 45 PARAMS ((lang_statement_union_type *)); 46static void gld${EMULATION_NAME}_create_output_section_statements 47 PARAMS ((void)); 48static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); 49static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); 50 51static void 52gld${EMULATION_NAME}_before_parse() 53{ 54 ldfile_output_architecture = bfd_arch_${ARCH}; 55 config.dynamic_link = true; 56} 57 58/* Try to open a dynamic archive. This is where we know that Linux 59 dynamic libraries have an extension of .sa. */ 60 61static boolean 62gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) 63 const char *arch; 64 search_dirs_type *search; 65 lang_input_statement_type *entry; 66{ 67 char *string; 68 69 if (! entry->is_archive) 70 return false; 71 72 string = (char *) xmalloc (strlen (search->name) 73 + strlen (entry->filename) 74 + strlen (arch) 75 + sizeof "/lib.sa"); 76 77 sprintf (string, "%s/lib%s%s.sa", search->name, entry->filename, arch); 78 79 if (! ldfile_try_open_bfd (string, entry)) 80 { 81 free (string); 82 return false; 83 } 84 85 entry->filename = string; 86 87 return true; 88} 89 90/* This is called by the create_output_section_statements routine via 91 lang_for_each_statement. It locates any address assignment to 92 .text, and modifies it to include the size of the headers. This 93 causes -Ttext to mean the starting address of the header, rather 94 than the starting address of .text, which is compatible with other 95 Linux tools. */ 96 97static void 98gld${EMULATION_NAME}_find_address_statement (s) 99 lang_statement_union_type *s; 100{ 101 if (s->header.type == lang_address_statement_enum 102 && strcmp (s->address_statement.section_name, ".text") == 0) 103 { 104 ASSERT (s->address_statement.address->type.node_class == etree_value); 105 s->address_statement.address->value.value += 0x20; 106 } 107} 108 109/* This is called before opening the input BFD's. */ 110 111static void 112gld${EMULATION_NAME}_create_output_section_statements () 113{ 114 lang_for_each_statement (gld${EMULATION_NAME}_find_address_statement); 115} 116 117/* This is called after the sections have been attached to output 118 sections, but before any sizes or addresses have been set. */ 119 120static void 121gld${EMULATION_NAME}_before_allocation () 122{ 123 if (link_info.relocateable) 124 return; 125 126 /* Let the backend work out the sizes of any sections required by 127 dynamic linking. */ 128 if (! bfd_${EMULATION_NAME}_size_dynamic_sections (output_bfd, &link_info)) 129 einfo ("%P%F: failed to set dynamic section sizes: %E\n"); 130} 131 132static char * 133gld${EMULATION_NAME}_get_script(isfile) 134 int *isfile; 135EOF 136 137if test -n "$COMPILE_IN" 138then 139# Scripts compiled in. 140 141# sed commands to quote an ld script as a C string. 142sc='s/["\\]/\\&/g 143s/$/\\n\\/ 1441s/^/"/ 145$s/$/n"/ 146' 147 148cat >>e${EMULATION_NAME}.c <<EOF 149{ 150 *isfile = 0; 151 152 if (link_info.relocateable == true && config.build_constructors == true) 153 return `sed "$sc" ldscripts/${EMULATION_NAME}.xu`; 154 else if (link_info.relocateable == true) 155 return `sed "$sc" ldscripts/${EMULATION_NAME}.xr`; 156 else if (!config.text_read_only) 157 return `sed "$sc" ldscripts/${EMULATION_NAME}.xbn`; 158 else if (!config.magic_demand_paged) 159 return `sed "$sc" ldscripts/${EMULATION_NAME}.xn`; 160 else 161 return `sed "$sc" ldscripts/${EMULATION_NAME}.x`; 162} 163EOF 164 165else 166# Scripts read from the filesystem. 167 168cat >>e${EMULATION_NAME}.c <<EOF 169{ 170 *isfile = 1; 171 172 if (link_info.relocateable == true && config.build_constructors == true) 173 return "ldscripts/${EMULATION_NAME}.xu"; 174 else if (link_info.relocateable == true) 175 return "ldscripts/${EMULATION_NAME}.xr"; 176 else if (!config.text_read_only) 177 return "ldscripts/${EMULATION_NAME}.xbn"; 178 else if (!config.magic_demand_paged) 179 return "ldscripts/${EMULATION_NAME}.xn"; 180 else 181 return "ldscripts/${EMULATION_NAME}.x"; 182} 183EOF 184 185fi 186 187cat >>e${EMULATION_NAME}.c <<EOF 188 189struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = 190{ 191 gld${EMULATION_NAME}_before_parse, 192 syslib_default, 193 hll_default, 194 after_parse_default, 195 after_open_default, 196 after_allocation_default, 197 set_output_arch_default, 198 ldemul_default_target, 199 gld${EMULATION_NAME}_before_allocation, 200 gld${EMULATION_NAME}_get_script, 201 "${EMULATION_NAME}", 202 "${OUTPUT_FORMAT}", 203 NULL, 204 gld${EMULATION_NAME}_create_output_section_statements, 205 gld${EMULATION_NAME}_open_dynamic_archive 206}; 207EOF 208