X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gas%2Fconfig%2Fobj-som.c;h=82b0af420a7fe581f8bf5fc74dcf02e8819acded;hb=07e7fdfd429985f061630c46e91cb10579607233;hp=9f6e4f37fd97653ffc94628625dc43aab4cf56bb;hpb=0fa747c4f36686e30923b227e14db67091456d84;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/config/obj-som.c b/gas/config/obj-som.c index 9f6e4f37fd..82b0af420a 100644 --- a/gas/config/obj-som.c +++ b/gas/config/obj-som.c @@ -1,11 +1,11 @@ /* SOM object file format. - Copyright (C) 1993 Free Software Foundation, Inc. + Copyright (C) 1993-2020 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. GAS 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, + published by the Free Software Foundation; either version 3, or (at your option) any later version. GAS is distributed in the hope that it will be useful, but @@ -13,9 +13,10 @@ 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 GAS; see the file COPYING. If not, write - to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + You should have received a copy of the GNU General Public License + along with GAS; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. Written by the Center for Software Science at the University of Utah and by Cygnus Support. */ @@ -23,40 +24,176 @@ #include "as.h" #include "subsegs.h" #include "aout/stab_gnu.h" -#include "obstack.h" -/* SOM does not need any pseudo-ops. */ +static int version_seen = 0; +static int copyright_seen = 0; +static int compiler_seen = 0; -const pseudo_typeS obj_pseudo_table[] = +/* Unused by SOM. */ + +void +obj_read_begin_hook (void) { - {NULL} -}; +} + +/* Handle a .compiler directive. This is intended to create the + compilation unit auxiliary header for MPE such that the linkeditor + can handle SOM extraction from archives. The format of the quoted + string is "sourcefile language version" and is delimited by blanks. */ + +void +obj_som_compiler (int unused ATTRIBUTE_UNUSED) +{ + char *buf; + char c; + char *filename; + char *language_name; + char *p; + char *version_id; + + if (compiler_seen) + { + as_bad (_("Only one .compiler pseudo-op per file!")); + ignore_rest_of_line (); + return; + } + + SKIP_WHITESPACE (); + if (*input_line_pointer == '\"') + { + buf = input_line_pointer; + ++input_line_pointer; + while (is_a_char (next_char_of_string ())) + ; + c = *input_line_pointer; + *input_line_pointer = '\000'; + } + else + { + as_bad (_("Expected quoted string")); + ignore_rest_of_line (); + return; + } -/* SOM does not use this. */ + /* Parse the quoted string into its component parts. Skip the + quote. */ + filename = buf + 1; + p = filename; + while (*p != ' ' && *p != '\000') + p++; + if (*p == '\000') + { + as_bad (_(".compiler directive missing language and version")); + return; + } + *p = '\000'; + + language_name = ++p; + while (*p != ' ' && *p != '\000') + p++; + if (*p == '\000') + { + as_bad (_(".compiler directive missing version")); + return; + } + *p = '\000'; + + version_id = ++p; + while (*p != '\000') + p++; + /* Remove the trailing quote. */ + *(--p) = '\000'; + + compiler_seen = 1; + if (! bfd_som_attach_compilation_unit (stdoutput, filename, language_name, + "GNU Tools", version_id)) + { + bfd_perror (stdoutput->filename); + as_fatal (_("FATAL: Attaching compiler header %s"), stdoutput->filename); + } + *input_line_pointer = c; + demand_empty_rest_of_line (); +} + +/* Handle a .version directive. */ void -obj_read_begin_hook () +obj_som_version (int unused ATTRIBUTE_UNUSED) { + char *version, c; + + if (version_seen) + { + as_bad (_("Only one .version pseudo-op per file!")); + ignore_rest_of_line (); + return; + } + + SKIP_WHITESPACE (); + if (*input_line_pointer == '\"') + { + version = input_line_pointer; + ++input_line_pointer; + while (is_a_char (next_char_of_string ())) + ; + c = *input_line_pointer; + *input_line_pointer = '\000'; + } + else + { + as_bad (_("Expected quoted string")); + ignore_rest_of_line (); + return; + } + + version_seen = 1; + if (!bfd_som_attach_aux_hdr (stdoutput, VERSION_AUX_ID, version)) + as_fatal (_("attaching version header %s: %s"), + stdoutput->filename, bfd_errmsg (bfd_get_error ())); + + *input_line_pointer = c; + demand_empty_rest_of_line (); } -/* Handle a .version directive. FIXME. We just parse the .version - directive and throw away the results!. */ +/* Handle a .copyright directive. This probably isn't complete, but + it's of dubious value anyway and (IMHO) not worth the time to finish. + If you care about copyright strings that much, you fix it. */ void -obj_som_version (unused) - int unused; +obj_som_copyright (int unused ATTRIBUTE_UNUSED) { - SKIP_WHITESPACE () + char *copyright, c; + + if (copyright_seen) + { + as_bad (_("Only one .copyright pseudo-op per file!")); + ignore_rest_of_line (); + return; + } + + SKIP_WHITESPACE (); if (*input_line_pointer == '\"') { + copyright = input_line_pointer; ++input_line_pointer; while (is_a_char (next_char_of_string ())) ; + c = *input_line_pointer; + *input_line_pointer = '\000'; } else { - as_bad ("Expected quoted string"); + as_bad (_("Expected quoted string")); + ignore_rest_of_line (); + return; } + + copyright_seen = 1; + if (!bfd_som_attach_aux_hdr (stdoutput, COPYRIGHT_AUX_ID, copyright)) + as_fatal (_("attaching copyright header %s: %s"), + stdoutput->filename, bfd_errmsg (bfd_get_error ())); + + *input_line_pointer = c; demand_empty_rest_of_line (); } @@ -68,30 +205,123 @@ obj_som_version (unused) which BFD does not understand. */ void -obj_som_init_stab_section (seg) - segT seg; +obj_som_init_stab_section (segT seg) { - segT saved_seg = now_seg, space; + segT saved_seg = now_seg; + segT space; subsegT saved_subseg = now_subseg; + char *p; + const char * file; + unsigned int stroff; /* Make the space which will contain the debug subspaces. */ space = bfd_make_section_old_way (stdoutput, "$GDB_DEBUG$"); /* Set SOM specific attributes for the space. In particular we set - the space "defined", "private", "sort_key", and "spnum" values. */ - obj_set_section_attributes (space, 1, 1, 255, 2); + the space "defined", "private", "sort_key", and "spnum" values. + + Due to a bug in pxdb (called by hpux linker), the sort keys + of the various stabs spaces/subspaces need to be "small". We + reserve range 72/73 which appear to work well. */ + obj_set_section_attributes (space, 1, 1, 72, 2); + bfd_set_section_alignment (space, 2); /* Set the containing space for both stab sections to be $GDB_DEBUG$ (just created above). Also set some attributes which BFD does not understand. In particular, access bits, sort keys, and load quadrant. */ - obj_set_subsection_attributes (seg, space, 0x1f, 255, 0); + obj_set_subsection_attributes (seg, space, 0x1f, 73, 0, 0, 0, 0); + bfd_set_section_alignment (seg, 2); + + /* Make some space for the first special stab entry and zero the memory. + It contains information about the length of this file's + stab string and the like. Using it avoids the need to + relocate the stab strings. - /* Likewise for the $GDB_STRINGS$ subspace. Note the section - hasn't been created at the time of this call, so we create - it now. */ - seg = subseg_new ("$GDB_STRINGS$", 0); - obj_set_subsection_attributes (seg, space, 0x1f, 254, 0); + The $GDB_STRINGS$ space will be created as a side effect of + the call to get_stab_string_offset. */ + p = frag_more (12); + memset (p, 0, 12); + file = as_where ((unsigned int *) NULL); + stroff = get_stab_string_offset (file, "$GDB_STRINGS$", FALSE); + know (stroff == 1); + md_number_to_chars (p, stroff, 4); + seg_info (seg)->stabu.p = p; + + /* Set the containing space for both stab sections to be $GDB_DEBUG$ + (just created above). Also set some attributes which BFD does + not understand. In particular, access bits, sort keys, and load + quadrant. */ + seg = bfd_get_section_by_name (stdoutput, "$GDB_STRINGS$"); + obj_set_subsection_attributes (seg, space, 0x1f, 72, 0, 0, 0, 0); + bfd_set_section_alignment (seg, 2); subseg_set (saved_seg, saved_subseg); } + +/* Fill in the counts in the first entry in a .stabs section. */ + +static void +adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED) +{ + asection *strsec; + char *p; + int strsz, nsyms; + + if (strcmp ("$GDB_SYMBOLS$", sec->name)) + return; + + strsec = bfd_get_section_by_name (abfd, "$GDB_STRINGS$"); + if (strsec) + strsz = bfd_section_size (strsec); + else + strsz = 0; + nsyms = bfd_section_size (sec) / 12 - 1; + + p = seg_info (sec)->stabu.p; + gas_assert (p != 0); + + bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6); + bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8); +} + +/* Called late in the assembly phase to adjust the special + stab entry and to set the starting address for each code subspace. */ + +void +som_frob_file (void) +{ + bfd_map_over_sections (stdoutput, adjust_stab_sections, (void *) 0); +} + +static void +obj_som_weak (int ignore ATTRIBUTE_UNUSED) +{ + char *name; + int c; + symbolS *symbolP; + + do + { + c = get_symbol_name (&name); + symbolP = symbol_find_or_make (name); + *input_line_pointer = c; + SKIP_WHITESPACE_AFTER_NAME (); + S_SET_WEAK (symbolP); + if (c == ',') + { + input_line_pointer++; + SKIP_WHITESPACE (); + if (*input_line_pointer == '\n') + c = '\n'; + } + } + while (c == ','); + demand_empty_rest_of_line (); +} + +const pseudo_typeS obj_pseudo_table[] = +{ + {"weak", obj_som_weak, 0}, + {NULL, NULL, 0} +};