# 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${EMULATION_NAME}.c < AIX support by Ian Lance Taylor AIX 64 bit support by Tom Rix This file is part of GLD, the Gnu Linker. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define TARGET_IS_${EMULATION_NAME} #include "bfd.h" #include "sysdep.h" #include "libiberty.h" #include "safe-ctype.h" #include "getopt.h" #include "obstack.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" #include "ldctor.h" #include "ldgram.h" #include "coff/internal.h" #include "coff/xcoff.h" static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **)); static void gld${EMULATION_NAME}_after_open PARAMS ((void)); static char *choose_target PARAMS ((int, char **)); static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean)); static void gld${EMULATION_NAME}_free PARAMS ((PTR)); static void gld${EMULATION_NAME}_find_relocs PARAMS ((lang_statement_union_type *)); static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *)); static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); static boolean gld${EMULATION_NAME}_unrecognized_file PARAMS ((lang_input_statement_type *)); static void gld${EMULATION_NAME}_create_output_section_statements PARAMS((void)); static int is_syscall PARAMS ((char *, unsigned int *)); static int change_symbol_mode PARAMS ((char *)); /* The file alignment required for each section. */ static unsigned long file_align; /* The maximum size the stack is permitted to grow. This is stored in the a.out header. */ static unsigned long maxstack; /* The maximum data size. This is stored in the a.out header. */ static unsigned long maxdata; /* Whether to perform garbage collection. */ static int gc = 1; /* The module type to use. */ static unsigned short modtype = ('1' << 8) | 'L'; /* Whether the .text section must be read-only (i.e., no relocs permitted). */ static int textro; /* Whether to implement Unix like linker semantics. */ static int unix_ld; /* Structure used to hold import file list. */ struct filelist { struct filelist *next; const char *name; }; /* List of import files. */ static struct filelist *import_files; /* List of export symbols read from the export files. */ struct export_symbol_list { struct export_symbol_list *next; const char *name; }; static struct export_symbol_list *export_symbols; /* Maintains the 32 or 64 bit mode state of import file */ static unsigned int symbol_mode = 0x04; /* Which symbol modes are valid */ static unsigned int symbol_mode_mask = 0x0d; /* Whether this is a 64 bit link */ static int is_64bit = 0; /* Which syscalls from import file are valid */ static unsigned int syscall_mask = 0x77; /* fake file for -binitfini support */ static lang_input_statement_type *initfini_file; /* Whether to do run time linking */ static boolean rtld; /* This routine is called before anything else is done. */ static void gld${EMULATION_NAME}_before_parse () { #ifndef TARGET_ /* I.e., if not generic. */ const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}"); if (arch) { ldfile_output_architecture = arch->arch; ldfile_output_machine = arch->mach; ldfile_output_machine_name = arch->printable_name; } else ldfile_output_architecture = bfd_arch_${ARCH}; #endif /* not TARGET_ */ config.has_shared = true; /* The link_info.[init|fini]_functions are initialized in ld/lexsup.c. Override them here so we can use the link_info.init_function as a state flag that lets the backend know that -binitfini has been done. */ link_info.init_function = NULL; link_info.fini_function = NULL; } /* Handle AIX specific options. */ static int gld${EMULATION_NAME}_parse_args (argc, argv) int argc; char **argv; { int prevoptind = optind; int prevopterr = opterr; int indx; int longind; int optc; bfd_signed_vma val; char *end; enum { OPTION_IGNORE = 300, OPTION_AUTOIMP, OPTION_ERNOTOK, OPTION_EROK, OPTION_EXPORT, OPTION_IMPORT, OPTION_INITFINI, OPTION_LOADMAP, OPTION_MAXDATA, OPTION_MAXSTACK, OPTION_MODTYPE, OPTION_NOAUTOIMP, OPTION_NOSTRCMPCT, OPTION_PD, OPTION_PT, OPTION_STRCMPCT, OPTION_UNIX, OPTION_32, OPTION_64, }; /* -binitfini has special handling in the linker backend. The native linker uses the arguemnts to generate a table of init and fini functions for the executable. The important use for this option is to support aix 4.2+ c++ constructors and destructors. This is tied into gcc via collect2.c. The function table is accessed by the runtime linker/loader by checking if the first symbol in the loader symbol table is __rtinit. The gnu linker generates this symbol and makes it the first loader symbol. */ static const struct option longopts[] = { {"basis", no_argument, NULL, OPTION_IGNORE}, {"bautoimp", no_argument, NULL, OPTION_AUTOIMP}, {"bcomprld", no_argument, NULL, OPTION_IGNORE}, {"bcrld", no_argument, NULL, OPTION_IGNORE}, {"bcror31", no_argument, NULL, OPTION_IGNORE}, {"bD", required_argument, NULL, OPTION_MAXDATA}, {"bE", required_argument, NULL, OPTION_EXPORT}, {"bernotok", no_argument, NULL, OPTION_ERNOTOK}, {"berok", no_argument, NULL, OPTION_EROK}, {"berrmsg", no_argument, NULL, OPTION_IGNORE}, {"bexport", required_argument, NULL, OPTION_EXPORT}, {"bf", no_argument, NULL, OPTION_ERNOTOK}, {"bgc", no_argument, &gc, 1}, {"bh", required_argument, NULL, OPTION_IGNORE}, {"bhalt", required_argument, NULL, OPTION_IGNORE}, {"bI", required_argument, NULL, OPTION_IMPORT}, {"bimport", required_argument, NULL, OPTION_IMPORT}, {"binitfini", required_argument, NULL, OPTION_INITFINI}, {"bl", required_argument, NULL, OPTION_LOADMAP}, {"bloadmap", required_argument, NULL, OPTION_LOADMAP}, {"bmaxdata", required_argument, NULL, OPTION_MAXDATA}, {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK}, {"bM", required_argument, NULL, OPTION_MODTYPE}, {"bmodtype", required_argument, NULL, OPTION_MODTYPE}, {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP}, {"bnodelcsect", no_argument, NULL, OPTION_IGNORE}, {"bnoentry", no_argument, NULL, OPTION_IGNORE}, {"bnogc", no_argument, &gc, 0}, {"bnso", no_argument, NULL, OPTION_NOAUTOIMP}, {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT}, {"bnotextro", no_argument, &textro, 0}, {"bnro", no_argument, &textro, 0}, {"bpD", required_argument, NULL, OPTION_PD}, {"bpT", required_argument, NULL, OPTION_PT}, {"bro", no_argument, &textro, 1}, {"brtl", no_argument, &rtld, 1}, {"bS", required_argument, NULL, OPTION_MAXSTACK}, {"bso", no_argument, NULL, OPTION_AUTOIMP}, {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT}, {"btextro", no_argument, &textro, 1}, {"b32", no_argument, NULL, OPTION_32}, {"b64", no_argument, NULL, OPTION_64}, {"static", no_argument, NULL, OPTION_NOAUTOIMP}, {"unix", no_argument, NULL, OPTION_UNIX}, {NULL, no_argument, NULL, 0} }; /* Options supported by the AIX linker which we do not support: -f, -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps, -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl, -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl, -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink, -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder, -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk, -bx, -bX, -bxref. */ /* If the current option starts with -b, change the first : to an =. The AIX linker uses : to separate the option from the argument; changing it to = lets us treat it as a getopt option. */ indx = optind; if (indx == 0) indx = 1; if (indx < argc && strncmp (argv[indx], "-b", 2) == 0) { char *s; for (s = argv[indx]; *s != '\0'; s++) { if (*s == ':') { *s = '='; break; } } } /* We add s and u so to the short options list so that -s and -u on the command line do not match -static and -unix. */ opterr = 0; optc = getopt_long_only (argc, argv, "-D:H:KT:zsu", longopts, &longind); opterr = prevopterr; switch (optc) { case 's': case 'u': default: optind = prevoptind; return 0; case 0: /* Long option which just sets a flag. */ break; case 'D': val = strtoll (optarg, &end, 0); if (*end != '\0') einfo ("%P: warning: ignoring invalid -D number %s\n", optarg); else if (val != -1) lang_section_start (".data", exp_intop (val)); break; case 'H': val = strtoul (optarg, &end, 0); if (*end != '\0' || (val & (val - 1)) != 0) einfo ("%P: warning: ignoring invalid -H number %s\n", optarg); else file_align = val; break; case 'K': case 'z': /* FIXME: This should use the page size for the target system. */ file_align = 4096; break; case 'T': /* On AIX this is the same as GNU ld -Ttext. When we see -T number, we assume the AIX option is intended. Otherwise, we assume the usual GNU ld -T option is intended. We can't just ignore the AIX option, because gcc passes it to the linker. */ val = strtoull (optarg, &end, 0); if (*end != '\0') { optind = prevoptind; return 0; } lang_section_start (".text", exp_intop (val)); break; case OPTION_IGNORE: break; case OPTION_INITFINI: { /* * The aix linker init fini has the format : * * -binitfini:[ Initial][:Termination][:Priority] * * it allows the Termination and Priority to be optional. * * Since we support only one init/fini pair, we ignore the Priority. * * Define the special symbol __rtinit. * * strtok does not correctly handle the case of -binitfini::fini: so * do it by hand */ char *t, *i, *f; i = t = optarg; while (*t && ':' != *t) t++; if (*t) *t++ = 0; if (0 != strlen (i)) link_info.init_function = i; f = t; while (*t && ':' != *t) t++; *t = 0; if (0 != strlen (f)) link_info.fini_function = f; } break; case OPTION_AUTOIMP: link_info.static_link = false; break; case OPTION_ERNOTOK: force_make_executable = false; break; case OPTION_EROK: force_make_executable = true; break; case OPTION_EXPORT: gld${EMULATION_NAME}_read_file (optarg, false); break; case OPTION_IMPORT: { struct filelist *n; struct filelist **flpp; n = (struct filelist *) xmalloc (sizeof (struct filelist)); n->next = NULL; n->name = optarg; flpp = &import_files; while (*flpp != NULL) flpp = &(*flpp)->next; *flpp = n; } break; case OPTION_LOADMAP: config.map_filename = optarg; break; case OPTION_MAXDATA: val = strtoull (optarg, &end, 0); if (*end != '\0') einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n", optarg); else maxdata = val; break; case OPTION_MAXSTACK: val = strtoull (optarg, &end, 0); if (*end != '\0') einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n", optarg); else maxstack = val; break; case OPTION_MODTYPE: if (*optarg == 'S') { link_info.shared = true; ++optarg; } if (*optarg == '\0' || optarg[1] == '\0') einfo ("%P: warning: ignoring invalid module type %s\n", optarg); else modtype = (*optarg << 8) | optarg[1]; break; case OPTION_NOAUTOIMP: link_info.static_link = true; break; case OPTION_NOSTRCMPCT: link_info.traditional_format = true; break; case OPTION_PD: /* This sets the page that the .data section is supposed to start on. The offset within the page should still be the offset within the file, so we need to build an appropriate expression. */ val = strtoull (optarg, &end, 0); if (*end != '\0') einfo ("%P: warning: ignoring invalid -pD number %s\n", optarg); else { etree_type *t; t = exp_binop ('+', exp_intop (val), exp_binop ('&', exp_nameop (NAME, "."), exp_intop (0xfff))); t = exp_binop ('&', exp_binop ('+', t, exp_intop (31)), exp_intop (~(bfd_vma) 31)); lang_section_start (".data", t); } break; case OPTION_PT: /* This set the page that the .text section is supposed to start on. The offset within the page should still be the offset within the file. */ val = strtoull (optarg, &end, 0); if (*end != '\0') einfo ("%P: warning: ignoring invalid -pT number %s\n", optarg); else { etree_type *t; t = exp_binop ('+', exp_intop (val), exp_nameop (SIZEOF_HEADERS, NULL)); t = exp_binop ('&', exp_binop ('+', t, exp_intop (31)), exp_intop (~(bfd_vma) 31)); lang_section_start (".text", t); } break; case OPTION_STRCMPCT: link_info.traditional_format = false; break; case OPTION_UNIX: unix_ld = true; break; case OPTION_32: is_64bit = 0; syscall_mask = 0x77; symbol_mode_mask = 0x0d; break; case OPTION_64: is_64bit = 1; syscall_mask = 0xcc; symbol_mode_mask = 0x0e; break; } return 1; } /* This is called when an input file can not be recognized as a BFD object or an archive. If the file starts with #!, we must treat it as an import file. This is for AIX compatibility. */ static boolean gld${EMULATION_NAME}_unrecognized_file (entry) lang_input_statement_type *entry; { FILE *e; boolean ret; e = fopen (entry->filename, FOPEN_RT); if (e == NULL) return false; ret = false; if (getc (e) == '#' && getc (e) == '!') { struct filelist *n; struct filelist **flpp; n = (struct filelist *) xmalloc (sizeof (struct filelist)); n->next = NULL; n->name = entry->filename; flpp = &import_files; while (*flpp != NULL) flpp = &(*flpp)->next; *flpp = n; ret = true; entry->loaded = true; } fclose (e); return ret; } /* This is called after the input files have been opened. */ static void gld${EMULATION_NAME}_after_open () { boolean r; struct set_info *p; /* Call ldctor_build_sets, after pretending that this is a relocateable link. We do this because AIX requires relocation entries for all references to symbols, even in a final executable. Of course, we only want to do this if we are producing an XCOFF output file. */ r = link_info.relocateable; if (strstr (bfd_get_target (output_bfd), "xcoff") != NULL) link_info.relocateable = true; ldctor_build_sets (); link_info.relocateable = r; /* For each set, record the size, so that the XCOFF backend can output the correct csect length. */ for (p = sets; p != (struct set_info *) NULL; p = p->next) { bfd_size_type size; /* If the symbol is defined, we may have been invoked from collect, and the sets may already have been built, so we do not do anything. */ if (p->h->type == bfd_link_hash_defined || p->h->type == bfd_link_hash_defweak) continue; if (p->reloc != BFD_RELOC_CTOR) { /* Handle this if we need to. */ abort (); } size = (p->count + 2) * 4; if (!bfd_xcoff_link_record_set (output_bfd, &link_info, p->h, size)) einfo ("%F%P: bfd_xcoff_link_record_set failed: %E\n"); } } /* This is called after the sections have been attached to output sections, but before any sizes or addresses have been set. */ static void gld${EMULATION_NAME}_before_allocation () { struct filelist *fl; struct export_symbol_list *el; char *libpath; asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS]; int i; /* Handle the import and export files, if any. */ for (fl = import_files; fl != NULL; fl = fl->next) gld${EMULATION_NAME}_read_file (fl->name, true); for (el = export_symbols; el != NULL; el = el->next) { struct bfd_link_hash_entry *h; h = bfd_link_hash_lookup (link_info.hash, el->name, false, false, false); if (h == NULL) einfo ("%P%F: bfd_link_hash_lookup of export symbol failed: %E\n"); if (!bfd_xcoff_export_symbol (output_bfd, &link_info, h)) einfo ("%P%F: bfd_xcoff_export_symbol failed: %E\n"); } /* Track down all relocations called for by the linker script (these are typically constructor/destructor entries created by CONSTRUCTORS) and let the backend know it will need to create .loader relocs for them. */ lang_for_each_statement (gld${EMULATION_NAME}_find_relocs); /* We need to build LIBPATH from the -L arguments. If any -rpath arguments were used, though, we use -rpath instead, as a GNU extension. */ if (command_line.rpath != NULL) libpath = command_line.rpath; else if (search_head == NULL) libpath = (char *) ""; else { size_t len; search_dirs_type *search; len = strlen (search_head->name); libpath = xmalloc (len + 1); strcpy (libpath, search_head->name); for (search = search_head->next; search != NULL; search = search->next) { size_t nlen; nlen = strlen (search->name); libpath = xrealloc (libpath, len + nlen + 2); libpath[len] = ':'; strcpy (libpath + len + 1, search->name); len += nlen + 1; } } /* Let the XCOFF backend set up the .loader section. */ if (!bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath, entry_symbol, file_align, maxstack, maxdata, gc && !unix_ld ? true : false, modtype, textro ? true : false, unix_ld, special_sections, rtld)) einfo ("%P%F: failed to set dynamic section sizes: %E\n"); /* Look through the special sections, and put them in the right place in the link ordering. This is especially magic. */ for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++) { asection *sec; lang_output_section_statement_type *os; lang_statement_union_type **pls; lang_input_section_type *is; const char *oname; boolean start; sec = special_sections[i]; if (sec == NULL) continue; /* Remove this section from the list of the output section. This assumes we know what the script looks like. */ is = NULL; os = lang_output_section_find (sec->output_section->name); if (os == NULL) einfo ("%P%F: can't find output section %s\n", sec->output_section->name); for (pls = &os->children.head; *pls != NULL; pls = &(*pls)->header.next) { if ((*pls)->header.type == lang_input_section_enum && (*pls)->input_section.section == sec) { is = (lang_input_section_type *) * pls; *pls = (*pls)->header.next; break; } if ((*pls)->header.type == lang_wild_statement_enum) { lang_statement_union_type **pwls; for (pwls = &(*pls)->wild_statement.children.head; *pwls != NULL; pwls = &(*pwls)->header.next) { if ((*pwls)->header.type == lang_input_section_enum && (*pwls)->input_section.section == sec) { is = (lang_input_section_type *) * pwls; *pwls = (*pwls)->header.next; break; } } if (is != NULL) break; } } if (is == NULL) { einfo ("%P%F: can't find %s in output section\n", bfd_get_section_name (sec->owner, sec)); } /* Now figure out where the section should go. */ switch (i) { default: /* to avoid warnings */ case XCOFF_SPECIAL_SECTION_TEXT: /* _text */ oname = ".text"; start = true; break; case XCOFF_SPECIAL_SECTION_ETEXT: /* _etext */ oname = ".text"; start = false; break; case XCOFF_SPECIAL_SECTION_DATA: /* _data */ oname = ".data"; start = true; break; case XCOFF_SPECIAL_SECTION_EDATA: /* _edata */ oname = ".data"; start = false; break; case XCOFF_SPECIAL_SECTION_END: case XCOFF_SPECIAL_SECTION_END2: /* _end and end */ oname = ".bss"; start = false; break; } os = lang_output_section_find (oname); if (start) { is->header.next = os->children.head; os->children.head = (lang_statement_union_type *) is; } else { is->header.next = NULL; lang_statement_append (&os->children, (lang_statement_union_type *) is, &is->header.next); } } } static char * choose_target (argc, argv) int argc; char **argv; { int i, j, jmax; static char *from_outside; static char *from_inside; static char *argv_to_target[][2] = { {NULL, "${OUTPUT_FORMAT}"}, {"-b32", "${OUTPUT_FORMAT_32BIT}"}, {"-b64", "${OUTPUT_FORMAT_64BIT}"}, }; jmax = 3; from_outside = getenv (TARGET_ENVIRON); if (from_outside != (char *) NULL) return from_outside; /* Set to default. */ from_inside = argv_to_target[0][1]; for (i = 1; i < argc; i++) { for (j = 1; j < jmax; j++) { if (0 == strcmp (argv[i], argv_to_target[j][0])) from_inside = argv_to_target[j][1]; } } return from_inside; } /* Returns 1 : state changed 0 : no change */ static int change_symbol_mode (input) char *input; { char *symbol_mode_string[] = { "# 32", /* 0x01 */ "# 64", /* 0x02 */ "# no32", /* 0x04 */ "# no64", /* 0x08 */ NULL, }; unsigned int bit; char *string; for (bit = 0;; bit++) { string = symbol_mode_string[bit]; if (string == NULL) return 0; if (0 == strcmp (input, string)) { symbol_mode = (1 << bit); return 1; } } /* should not be here */ return 0; } /* Returns 1 : yes 0 : ignore -1 : error, try something else */ static int is_syscall (input, flag) char *input; unsigned int *flag; { unsigned int bit; char *string; struct sc { char *syscall_string; unsigned int flag; } s [] = { { "svc" /* 0x01 */, XCOFF_SYSCALL32 }, { "svc32" /* 0x02 */, XCOFF_SYSCALL32 }, { "svc3264" /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 }, { "svc64" /* 0x08 */, XCOFF_SYSCALL64 }, { "syscall" /* 0x10 */, XCOFF_SYSCALL32 }, { "syscall32" /* 0x20 */, XCOFF_SYSCALL32 }, { "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 }, { "syscall64" /* 0x80 */, XCOFF_SYSCALL64 }, { NULL, 0 }, }; *flag = 0; for (bit = 0;; bit++) { string = s[bit].syscall_string; if (string == NULL) return -1; if (0 == strcmp (input, string)) { if (1 << bit & syscall_mask) { *flag = s[bit].flag; return 1; } else { return 0; } } } /* should not be here */ return -1; } /* Read an import or export file. For an import file, this is called by the before_allocation emulation routine. For an export file, this is called by the parse_args emulation routine. */ static void gld${EMULATION_NAME}_read_file (filename, import) const char *filename; boolean import; { struct obstack *o; FILE *f; int lineno; int c; boolean keep; const char *imppath; const char *impfile; const char *impmember; o = (struct obstack *) xmalloc (sizeof (struct obstack)); obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free); f = fopen (filename, FOPEN_RT); if (f == NULL) { bfd_set_error (bfd_error_system_call); einfo ("%F%s: %E\n", filename); } keep = false; imppath = NULL; impfile = NULL; impmember = NULL; lineno = 0; /* Default to 32 and 64 bit mode symbols at top of /lib/syscalls.exp do not have a mode modifier and they are not repeated, assume 64 bit routines also want to use them. See the routine change_symbol_mode for more information. */ symbol_mode = 0x04; while ((c = getc (f)) != EOF) { char *s; char *symname; unsigned int syscall_flag = 0; bfd_vma address; struct bfd_link_hash_entry *h; if (c != '\n') { obstack_1grow (o, c); continue; } obstack_1grow (o, '\0'); ++lineno; s = (char *) obstack_base (o); while (ISSPACE (*s)) ++s; if (*s == '\0' || *s == '*' || change_symbol_mode (s) || (*s == '#' && s[1] == ' ') || (!import && *s == '#' && s[1] == '!')) { obstack_free (o, obstack_base (o)); continue; } if (*s == '#' && s[1] == '!') { s += 2; while (ISSPACE (*s)) ++s; if (*s == '\0') { imppath = NULL; impfile = NULL; impmember = NULL; obstack_free (o, obstack_base (o)); } else if (*s == '(') einfo ("%F%s%d: #! ([member]) is not supported in import files\n", filename, lineno); else { char cs; char *file; (void) obstack_finish (o); keep = true; imppath = s; file = NULL; while (!ISSPACE (*s) && *s != '(' && *s != '\0') { if (*s == '/') file = s + 1; ++s; } if (file != NULL) { file[-1] = '\0'; impfile = file; if (imppath == file - 1) imppath = "/"; } else { impfile = imppath; imppath = ""; } cs = *s; *s = '\0'; while (ISSPACE (cs)) { ++s; cs = *s; } if (cs != '(') { impmember = ""; if (cs != '\0') einfo ("%s:%d: warning: syntax error in import file\n", filename, lineno); } else { ++s; impmember = s; while (*s != ')' && *s != '\0') ++s; if (*s == ')') *s = '\0'; else einfo ("%s:%d: warning: syntax error in import file\n", filename, lineno); } } continue; } if (symbol_mode & symbol_mode_mask) { /* This is a symbol to be imported or exported. */ symname = s; syscall_flag = 0; address = (bfd_vma) -1; while (!ISSPACE (*s) && *s != '\0') ++s; if (*s != '\0') { char *se; *s++ = '\0'; while (ISSPACE (*s)) ++s; se = s; while (!ISSPACE (*se) && *se != '\0') ++se; if (*se != '\0') { *se++ = '\0'; while (ISSPACE (*se)) ++se; if (*se != '\0') einfo ("%s%d: warning: syntax error in import/export file\n", filename, lineno); } if (s != se) { int status; char *end; status = is_syscall (s, &syscall_flag); if (0 > status) { /* not a system call, check for address */ address = strtoul (s, &end, 0); if (*end != '\0') { einfo ("%s:%d: warning: syntax error in import/export file\n", filename, lineno); } } } } if (!import) { struct export_symbol_list *n; ldlang_add_undef (symname); n = ((struct export_symbol_list *) xmalloc (sizeof (struct export_symbol_list))); n->next = export_symbols; n->name = xstrdup (symname); export_symbols = n; } else { h = bfd_link_hash_lookup (link_info.hash, symname, false, false, true); if (h == NULL || h->type == bfd_link_hash_new) { /* We can just ignore attempts to import an unreferenced symbol. */ } else { if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h, address, imppath, impfile, impmember, syscall_flag)) einfo ("%X%s:%d: failed to import symbol %s: %E\n", filename, lineno, symname); } } } obstack_free (o, obstack_base (o)); } if (obstack_object_size (o) > 0) { einfo ("%s:%d: warning: ignoring unterminated last line\n", filename, lineno); obstack_free (o, obstack_base (o)); } if (!keep) { obstack_free (o, NULL); free (o); } } /* This routine saves us from worrying about declaring free. */ static void gld${EMULATION_NAME}_free (p) PTR p; { free (p); } /* This is called by the before_allocation routine via lang_for_each_statement. It looks for relocations and assignments to symbols. */ static void gld${EMULATION_NAME}_find_relocs (s) lang_statement_union_type *s; { if (s->header.type == lang_reloc_statement_enum) { lang_reloc_statement_type *rs; rs = &s->reloc_statement; if (rs->name == NULL) einfo ("%F%P: only relocations against symbols are permitted\n"); if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name)) einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n"); } if (s->header.type == lang_assignment_statement_enum) gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); } /* Look through an expression for an assignment statement. */ static void gld${EMULATION_NAME}_find_exp_assignment (exp) etree_type *exp; { struct bfd_link_hash_entry *h; switch (exp->type.node_class) { case etree_provide: h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst, false, false, false); if (h == NULL) break; /* Fall through. */ case etree_assign: if (strcmp (exp->assign.dst, ".") != 0) { if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info, exp->assign.dst)) einfo ("%P%F: failed to record assignment to %s: %E\n", exp->assign.dst); } gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); break; case etree_binary: gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); break; case etree_trinary: gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); break; case etree_unary: gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); break; default: break; } } static char * gld${EMULATION_NAME}_get_script (isfile) 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 ${srcdir}/emultempl/ostring.sed" cat >>e${EMULATION_NAME}.c <> 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 else # Scripts read from the filesystem. cat >>e${EMULATION_NAME}.c <>e${EMULATION_NAME}.c <the_bfd = bfd_create ("initfini", output_bfd); if (initfini_file->the_bfd == NULL || ! bfd_set_arch_mach (initfini_file->the_bfd, bfd_get_arch (output_bfd), bfd_get_mach (output_bfd))) { einfo ("%X%P: can not create BFD %E\n"); return; } /* Call backend to fill in the rest */ if (false == bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd, link_info.init_function, link_info.fini_function, rtld)) { einfo ("%X%P: can not create BFD %E\n"); return; } /* __rtld defined in /lib/librtl.a */ if (true == rtld) lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL); } } struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = { gld${EMULATION_NAME}_before_parse, syslib_default, hll_default, after_parse_default, gld${EMULATION_NAME}_after_open, after_allocation_default, set_output_arch_default, choose_target, gld${EMULATION_NAME}_before_allocation, gld${EMULATION_NAME}_get_script, "${EMULATION_NAME}", "${OUTPUT_FORMAT}", 0, /* finish */ gld${EMULATION_NAME}_create_output_section_statements, 0, /* open_dynamic_archive */ 0, /* place_orphan */ 0, /* set_symbols */ gld${EMULATION_NAME}_parse_args, gld${EMULATION_NAME}_unrecognized_file, NULL, /* list_options */ NULL, /* recognized_file */ NULL, /* find potential_libraries */ }; EOF