| /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| Copyright (C) 1986-2024 Free Software Foundation, Inc. |
| Derived from coffread.c, dbxread.c, and a lot of hacking. |
| Contributed by IBM Corporation. |
| |
| This file is part of GDB. |
| |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "bfd.h" |
| #include "event-top.h" |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <ctype.h> |
| #ifdef HAVE_SYS_FILE_H |
| #include <sys/file.h> |
| #endif |
| #include <sys/stat.h> |
| #include <algorithm> |
| |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| #include "coff/xcoff.h" |
| #include "libxcoff.h" |
| #include "coff/rs6000.h" |
| #include "xcoffread.h" |
| |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */ |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym-legacy.h" |
| #include "stabsread.h" |
| #include "expression.h" |
| #include "complaints.h" |
| #include "psymtab.h" |
| #include "dwarf2/sect-names.h" |
| #include "dwarf2/public.h" |
| |
| #include "gdb-stabs.h" |
| |
| /* For interface with stabsread.c. */ |
| #include "aout/stab_gnu.h" |
| |
| |
| /* We put a pointer to this structure in the read_symtab_private field |
| of the psymtab. */ |
| |
| struct xcoff_symloc |
| { |
| |
| /* First symbol number for this file. */ |
| |
| int first_symnum; |
| |
| /* Number of symbols in the section of the symbol table devoted to |
| this file's symbols (actually, the section bracketed may contain |
| more than just this file's symbols). If numsyms is 0, the only |
| reason for this thing's existence is the dependency list. Nothing |
| else will happen when it is read in. */ |
| |
| int numsyms; |
| |
| /* Position of the start of the line number information for this |
| psymtab. */ |
| unsigned int lineno_off; |
| }; |
| |
| /* Remember what we deduced to be the source language of this psymtab. */ |
| |
| static enum language psymtab_language = language_unknown; |
| |
| |
| /* Simplified internal version of coff symbol table information. */ |
| |
| struct xcoff_symbol |
| { |
| char *c_name; |
| int c_symnum; /* Symbol number of this entry. */ |
| int c_naux; /* 0 if syment only, 1 if syment + auxent. */ |
| CORE_ADDR c_value; |
| unsigned char c_sclass; |
| int c_secnum; |
| unsigned int c_type; |
| }; |
| |
| /* Last function's saved coff symbol `cs'. */ |
| |
| static struct xcoff_symbol fcn_cs_saved; |
| |
| static bfd *symfile_bfd; |
| |
| /* Core address of start and end of text of current source file. |
| This is calculated from the first function seen after a C_FILE |
| symbol. */ |
| |
| |
| static CORE_ADDR cur_src_end_addr; |
| |
| /* Core address of the end of the first object file. */ |
| |
| static CORE_ADDR first_object_file_end; |
| |
| /* Initial symbol-table-debug-string vector length. */ |
| |
| #define INITIAL_STABVECTOR_LENGTH 40 |
| |
| /* Size of a COFF symbol. I think it is always 18, so I'm not sure |
| there is any reason not to just use a #define, but might as well |
| ask BFD for the size and store it here, I guess. */ |
| |
| static unsigned local_symesz; |
| |
| struct xcoff_symfile_info |
| { |
| file_ptr min_lineno_offset {}; /* Where in file lowest line#s are. */ |
| file_ptr max_lineno_offset {}; /* 1+last byte of line#s in file. */ |
| |
| /* Pointer to the string table. */ |
| char *strtbl = nullptr; |
| |
| /* Pointer to debug section. */ |
| char *debugsec = nullptr; |
| |
| /* Pointer to the a.out symbol table. */ |
| char *symtbl = nullptr; |
| |
| /* Number of symbols in symtbl. */ |
| int symtbl_num_syms = 0; |
| |
| /* Offset in data section to TOC anchor. */ |
| CORE_ADDR toc_offset = 0; |
| }; |
| |
| /* Key for XCOFF-associated data. */ |
| |
| static const registry<objfile>::key<xcoff_symfile_info> xcoff_objfile_data_key; |
| |
| /* Convenience macro to access the per-objfile XCOFF data. */ |
| |
| #define XCOFF_DATA(objfile) \ |
| xcoff_objfile_data_key.get (objfile) |
| |
| /* XCOFF names for dwarf sections. There is no compressed sections. */ |
| |
| static const struct dwarf2_debug_sections dwarf2_xcoff_names = { |
| { ".dwinfo", NULL }, |
| { ".dwabrev", NULL }, |
| { ".dwline", NULL }, |
| { ".dwloc", NULL }, |
| { NULL, NULL }, /* debug_loclists */ |
| /* AIX XCOFF defines one, named DWARF section for macro debug information. |
| XLC does not generate debug_macinfo for DWARF4 and below. |
| The section is assigned to debug_macro for DWARF5 and above. */ |
| { NULL, NULL }, |
| { ".dwmac", NULL }, |
| { ".dwstr", NULL }, |
| { NULL, NULL }, /* debug_str_offsets */ |
| { NULL, NULL }, /* debug_line_str */ |
| { ".dwrnges", NULL }, |
| { NULL, NULL }, /* debug_rnglists */ |
| { ".dwpbtyp", NULL }, |
| { NULL, NULL }, /* debug_addr */ |
| { ".dwframe", NULL }, |
| { NULL, NULL }, /* eh_frame */ |
| { NULL, NULL }, /* gdb_index */ |
| { NULL, NULL }, /* debug_names */ |
| { NULL, NULL }, /* debug_aranges */ |
| 23 |
| }; |
| |
| static void |
| bf_notfound_complaint (void) |
| { |
| complaint (_("line numbers off, `.bf' symbol not found")); |
| } |
| |
| static void |
| ef_complaint (int arg1) |
| { |
| complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1); |
| } |
| |
| static void |
| eb_complaint (int arg1) |
| { |
| complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1); |
| } |
| |
| static void xcoff_initial_scan (struct objfile *, symfile_add_flags); |
| |
| static void scan_xcoff_symtab (minimal_symbol_reader &, |
| psymtab_storage *partial_symtabs, |
| struct objfile *); |
| |
| static const char *xcoff_next_symbol_text (struct objfile *); |
| |
| static void record_include_begin (struct xcoff_symbol *); |
| |
| static void |
| enter_line_range (struct subfile *, unsigned, unsigned, |
| CORE_ADDR, CORE_ADDR, unsigned *); |
| |
| static void init_stringtab (bfd *, file_ptr, struct objfile *); |
| |
| static void xcoff_symfile_init (struct objfile *); |
| |
| static void xcoff_new_init (struct objfile *); |
| |
| static void xcoff_symfile_finish (struct objfile *); |
| |
| static char *coff_getfilename (union internal_auxent *, struct objfile *); |
| |
| static void read_symbol (struct internal_syment *, int); |
| |
| static int read_symbol_lineno (int); |
| |
| static CORE_ADDR read_symbol_nvalue (int); |
| |
| static struct symbol *process_xcoff_symbol (struct xcoff_symbol *, |
| struct objfile *); |
| |
| static void read_xcoff_symtab (struct objfile *, legacy_psymtab *); |
| |
| #if 0 |
| static void add_stab_to_list (char *, struct pending_stabs **); |
| #endif |
| |
| static void record_include_end (struct xcoff_symbol *); |
| |
| static void process_linenos (CORE_ADDR, CORE_ADDR); |
| |
| |
| /* Translate from a COFF section number (target_index) to a SECT_OFF_* |
| code. */ |
| static int secnum_to_section (int, struct objfile *); |
| static asection *secnum_to_bfd_section (int, struct objfile *); |
| |
| struct xcoff_find_targ_sec_arg |
| { |
| int targ_index; |
| int *resultp; |
| asection **bfd_sect; |
| struct objfile *objfile; |
| }; |
| |
| static void find_targ_sec (bfd *, asection *, void *); |
| |
| static void |
| find_targ_sec (bfd *abfd, asection *sect, void *obj) |
| { |
| struct xcoff_find_targ_sec_arg *args |
| = (struct xcoff_find_targ_sec_arg *) obj; |
| struct objfile *objfile = args->objfile; |
| |
| if (sect->target_index == args->targ_index) |
| { |
| /* This is the section. Figure out what SECT_OFF_* code it is. */ |
| if (bfd_section_flags (sect) & SEC_CODE) |
| *args->resultp = SECT_OFF_TEXT (objfile); |
| else if (bfd_section_flags (sect) & SEC_LOAD) |
| *args->resultp = SECT_OFF_DATA (objfile); |
| else |
| *args->resultp = gdb_bfd_section_index (abfd, sect); |
| *args->bfd_sect = sect; |
| } |
| } |
| |
| /* Search all BFD sections for the section whose target_index is |
| equal to N_SCNUM. Set *BFD_SECT to that section. The section's |
| associated index in the objfile's section_offset table is also |
| stored in *SECNUM. |
| |
| If no match is found, *BFD_SECT is set to NULL, and *SECNUM |
| is set to the text section's number. */ |
| |
| static void |
| xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile, |
| asection **bfd_sect, int *secnum) |
| { |
| struct xcoff_find_targ_sec_arg args; |
| |
| args.targ_index = n_scnum; |
| args.resultp = secnum; |
| args.bfd_sect = bfd_sect; |
| args.objfile = objfile; |
| |
| *bfd_sect = NULL; |
| *secnum = SECT_OFF_TEXT (objfile); |
| |
| bfd_map_over_sections (objfile->obfd.get (), find_targ_sec, &args); |
| } |
| |
| /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */ |
| |
| static int |
| secnum_to_section (int n_scnum, struct objfile *objfile) |
| { |
| int secnum; |
| asection *ignored; |
| |
| xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum); |
| return secnum; |
| } |
| |
| /* Return the BFD section that N_SCNUM points to. */ |
| |
| static asection * |
| secnum_to_bfd_section (int n_scnum, struct objfile *objfile) |
| { |
| int ignored; |
| asection *bfd_sect; |
| |
| xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored); |
| return bfd_sect; |
| } |
| |
| /* add a given stab string into given stab vector. */ |
| |
| #if 0 |
| |
| static void |
| add_stab_to_list (char *stabname, struct pending_stabs **stabvector) |
| { |
| if (*stabvector == NULL) |
| { |
| *stabvector = (struct pending_stabs *) |
| xmalloc (sizeof (struct pending_stabs) + |
| INITIAL_STABVECTOR_LENGTH * sizeof (char *)); |
| (*stabvector)->count = 0; |
| (*stabvector)->length = INITIAL_STABVECTOR_LENGTH; |
| } |
| else if ((*stabvector)->count >= (*stabvector)->length) |
| { |
| (*stabvector)->length += INITIAL_STABVECTOR_LENGTH; |
| *stabvector = (struct pending_stabs *) |
| xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) + |
| (*stabvector)->length * sizeof (char *)); |
| } |
| (*stabvector)->stab[(*stabvector)->count++] = stabname; |
| } |
| |
| #endif |
| |
| /* Linenos are processed on a file-by-file basis. |
| |
| Two reasons: |
| |
| 1) xlc (IBM's native c compiler) postpones static function code |
| emission to the end of a compilation unit. This way it can |
| determine if those functions (statics) are needed or not, and |
| can do some garbage collection (I think). This makes line |
| numbers and corresponding addresses unordered, and we end up |
| with a line table like: |
| |
| |
| lineno addr |
| foo() 10 0x100 |
| 20 0x200 |
| 30 0x300 |
| |
| foo3() 70 0x400 |
| 80 0x500 |
| 90 0x600 |
| |
| static foo2() |
| 40 0x700 |
| 50 0x800 |
| 60 0x900 |
| |
| and that breaks gdb's binary search on line numbers, if the |
| above table is not sorted on line numbers. And that sort |
| should be on function based, since gcc can emit line numbers |
| like: |
| |
| 10 0x100 - for the init/test part of a for stmt. |
| 20 0x200 |
| 30 0x300 |
| 10 0x400 - for the increment part of a for stmt. |
| |
| arrange_linetable() will do this sorting. |
| |
| 2) aix symbol table might look like: |
| |
| c_file // beginning of a new file |
| .bi // beginning of include file |
| .ei // end of include file |
| .bi |
| .ei |
| |
| basically, .bi/.ei pairs do not necessarily encapsulate |
| their scope. They need to be recorded, and processed later |
| on when we come the end of the compilation unit. |
| Include table (inclTable) and process_linenos() handle |
| that. */ |
| |
| |
| /* Given a line table with function entries are marked, arrange its |
| functions in ascending order and strip off function entry markers |
| and return it in a newly created table. */ |
| |
| /* FIXME: I think all this stuff can be replaced by just passing |
| sort_linevec = 1 to end_compunit_symtab. */ |
| |
| static void |
| arrange_linetable (std::vector<linetable_entry> &old_linetable) |
| { |
| std::vector<linetable_entry> fentries; |
| |
| for (int ii = 0; ii < old_linetable.size (); ++ii) |
| { |
| if (!old_linetable[ii].is_stmt) |
| continue; |
| |
| if (old_linetable[ii].line == 0) |
| { |
| /* Function entry found. */ |
| linetable_entry &e = fentries.emplace_back (); |
| e.line = ii; |
| e.is_stmt = true; |
| e.set_unrelocated_pc (old_linetable[ii].unrelocated_pc ()); |
| } |
| } |
| |
| if (fentries.empty ()) |
| return; |
| |
| std::sort (fentries.begin (), fentries.end ()); |
| |
| /* Allocate a new line table. */ |
| std::vector<linetable_entry> new_linetable; |
| new_linetable.reserve (old_linetable.size ()); |
| |
| /* If line table does not start with a function beginning, copy up until |
| a function begin. */ |
| for (int i = 0; i < old_linetable.size () && old_linetable[i].line != 0; ++i) |
| new_linetable.push_back (old_linetable[i]); |
| |
| /* Now copy function lines one by one. */ |
| for (const linetable_entry &entry : fentries) |
| { |
| /* If the function was compiled with XLC, we may have to add an |
| extra line to cover the function prologue. */ |
| int jj = entry.line; |
| if (jj + 1 < old_linetable.size () |
| && (old_linetable[jj].unrelocated_pc () |
| != old_linetable[jj + 1].unrelocated_pc ())) |
| { |
| new_linetable.push_back (old_linetable[jj]); |
| new_linetable.back ().line = old_linetable[jj + 1].line; |
| } |
| |
| for (jj = entry.line + 1; |
| jj < old_linetable.size () && old_linetable[jj].line != 0; |
| ++jj) |
| new_linetable.push_back (old_linetable[jj]); |
| } |
| |
| new_linetable.shrink_to_fit (); |
| old_linetable = std::move (new_linetable); |
| } |
| |
| /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| following `IncludeChain'. At the end of each symtab (end_compunit_symtab), |
| we will determine if we should create additional symtab's to |
| represent if (the include files. */ |
| |
| |
| typedef struct _inclTable |
| { |
| char *name; /* include filename */ |
| |
| /* Offsets to the line table. end points to the last entry which is |
| part of this include file. */ |
| int begin, end; |
| |
| struct subfile *subfile; |
| unsigned funStartLine; /* Start line # of its function. */ |
| } |
| InclTable; |
| |
| #define INITIAL_INCLUDE_TABLE_LENGTH 20 |
| static InclTable *inclTable; /* global include table */ |
| static int inclIndx; /* last entry to table */ |
| static int inclLength; /* table length */ |
| static int inclDepth; /* nested include depth */ |
| |
| /* subfile structure for the main compilation unit. */ |
| static subfile *main_subfile; |
| |
| static void allocate_include_entry (void); |
| |
| static void |
| record_include_begin (struct xcoff_symbol *cs) |
| { |
| if (inclDepth) |
| { |
| /* In xcoff, we assume include files cannot be nested (not in .c files |
| of course, but in corresponding .s files.). */ |
| |
| /* This can happen with old versions of GCC. |
| GCC 2.3.3-930426 does not exhibit this on a test case which |
| a user said produced the message for him. */ |
| complaint (_("Nested C_BINCL symbols")); |
| } |
| ++inclDepth; |
| |
| allocate_include_entry (); |
| |
| inclTable[inclIndx].name = cs->c_name; |
| inclTable[inclIndx].begin = cs->c_value; |
| } |
| |
| static void |
| record_include_end (struct xcoff_symbol *cs) |
| { |
| InclTable *pTbl; |
| |
| if (inclDepth == 0) |
| { |
| complaint (_("Mismatched C_BINCL/C_EINCL pair")); |
| } |
| |
| allocate_include_entry (); |
| |
| pTbl = &inclTable[inclIndx]; |
| pTbl->end = cs->c_value; |
| |
| --inclDepth; |
| ++inclIndx; |
| } |
| |
| static void |
| allocate_include_entry (void) |
| { |
| if (inclTable == NULL) |
| { |
| inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH); |
| inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| inclIndx = 0; |
| main_subfile = new subfile; |
| } |
| else if (inclIndx >= inclLength) |
| { |
| inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| inclTable = XRESIZEVEC (InclTable, inclTable, inclLength); |
| memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH, |
| '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| } |
| } |
| |
| /* Global variable to pass the psymtab down to all the routines involved |
| in psymtab to symtab processing. */ |
| static legacy_psymtab *this_symtab_psymtab; |
| |
| /* Objfile related to this_symtab_psymtab; set at the same time. */ |
| static struct objfile *this_symtab_objfile; |
| |
| /* given the start and end addresses of a compilation unit (or a csect, |
| at times) process its lines and create appropriate line vectors. */ |
| |
| static void |
| process_linenos (CORE_ADDR start, CORE_ADDR end) |
| { |
| int offset; |
| file_ptr max_offset |
| = XCOFF_DATA (this_symtab_objfile)->max_lineno_offset; |
| |
| /* In the main source file, any time we see a function entry, we |
| reset this variable to function's absolute starting line number. |
| All the following line numbers in the function are relative to |
| this, and we record absolute line numbers in record_line(). */ |
| |
| unsigned int main_source_baseline = 0; |
| |
| unsigned *firstLine; |
| |
| offset = |
| ((struct xcoff_symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; |
| if (offset == 0) |
| goto return_after_cleanup; |
| |
| if (inclIndx == 0) |
| /* All source lines were in the main source file. None in include |
| files. */ |
| |
| enter_line_range (main_subfile, offset, 0, start, end, |
| &main_source_baseline); |
| |
| else |
| { |
| /* There was source with line numbers in include files. */ |
| |
| int linesz = |
| coff_data (this_symtab_objfile->obfd)->local_linesz; |
| main_source_baseline = 0; |
| |
| for (int ii = 0; ii < inclIndx; ++ii) |
| { |
| /* If there is main file source before include file, enter it. */ |
| if (offset < inclTable[ii].begin) |
| { |
| enter_line_range |
| (main_subfile, offset, inclTable[ii].begin - linesz, |
| start, 0, &main_source_baseline); |
| } |
| |
| if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0) |
| { |
| /* The entry in the include table refers to the main source |
| file. Add the lines to the main subfile. */ |
| |
| main_source_baseline = inclTable[ii].funStartLine; |
| enter_line_range |
| (main_subfile, inclTable[ii].begin, inclTable[ii].end, |
| start, 0, &main_source_baseline); |
| inclTable[ii].subfile = main_subfile; |
| } |
| else |
| { |
| /* Have a new subfile for the include file. */ |
| inclTable[ii].subfile = new subfile; |
| |
| firstLine = &(inclTable[ii].funStartLine); |
| |
| /* Enter include file's lines now. */ |
| enter_line_range (inclTable[ii].subfile, inclTable[ii].begin, |
| inclTable[ii].end, start, 0, firstLine); |
| } |
| |
| if (offset <= inclTable[ii].end) |
| offset = inclTable[ii].end + linesz; |
| } |
| |
| /* All the include files' line have been processed at this point. Now, |
| enter remaining lines of the main file, if any left. */ |
| if (offset < max_offset + 1 - linesz) |
| { |
| enter_line_range (main_subfile, offset, 0, start, end, |
| &main_source_baseline); |
| } |
| } |
| |
| /* Process main file's line numbers. */ |
| if (!main_subfile->line_vector_entries.empty ()) |
| { |
| /* Line numbers are not necessarily ordered. xlc compilation will |
| put static function to the end. */ |
| arrange_linetable (main_subfile->line_vector_entries); |
| } |
| |
| /* Now, process included files' line numbers. */ |
| |
| for (int ii = 0; ii < inclIndx; ++ii) |
| { |
| if (inclTable[ii].subfile != main_subfile |
| && !inclTable[ii].subfile->line_vector_entries.empty ()) |
| { |
| /* Line numbers are not necessarily ordered. xlc compilation will |
| put static function to the end. */ |
| arrange_linetable (inclTable[ii].subfile->line_vector_entries); |
| |
| push_subfile (); |
| |
| /* For the same include file, we might want to have more than one |
| subfile. This happens if we have something like: |
| |
| ...... |
| #include "foo.h" |
| ...... |
| #include "foo.h" |
| ...... |
| |
| while foo.h including code in it. (stupid but possible) |
| Since start_subfile() looks at the name and uses an |
| existing one if finds, we need to provide a fake name and |
| fool it. */ |
| |
| #if 0 |
| start_subfile (inclTable[ii].name); |
| #else |
| { |
| /* Pick a fake name that will produce the same results as this |
| one when passed to deduce_language_from_filename. Kludge on |
| top of kludge. */ |
| const char *fakename = strrchr (inclTable[ii].name, '.'); |
| |
| if (fakename == NULL) |
| fakename = " ?"; |
| start_subfile (fakename); |
| } |
| struct subfile *current_subfile = get_current_subfile (); |
| current_subfile->name = inclTable[ii].name; |
| current_subfile->name_for_id = inclTable[ii].name; |
| #endif |
| |
| start_subfile (pop_subfile ()); |
| } |
| } |
| |
| return_after_cleanup: |
| |
| /* We don't want to keep alloc/free'ing the global include file table. */ |
| inclIndx = 0; |
| } |
| |
| static void |
| aix_process_linenos (struct objfile *objfile) |
| { |
| /* There is no linenos to read if there are only dwarf info. */ |
| if (this_symtab_psymtab == NULL) |
| return; |
| |
| /* Process line numbers and enter them into line vector. */ |
| process_linenos (get_last_source_start_addr (), cur_src_end_addr); |
| } |
| |
| |
| /* Enter a given range of lines into the line vector. |
| can be called in the following two ways: |
| enter_line_range (subfile, beginoffset, endoffset, |
| startaddr, 0, firstLine) or |
| enter_line_range (subfile, beginoffset, 0, |
| startaddr, endaddr, firstLine) |
| |
| endoffset points to the last line table entry that we should pay |
| attention to. */ |
| |
| static void |
| enter_line_range (struct subfile *subfile, unsigned beginoffset, |
| unsigned endoffset, /* offsets to line table */ |
| CORE_ADDR startaddr, /* offsets to line table */ |
| CORE_ADDR endaddr, unsigned *firstLine) |
| { |
| struct objfile *objfile = this_symtab_objfile; |
| struct gdbarch *gdbarch = objfile->arch (); |
| unsigned int curoffset; |
| CORE_ADDR addr; |
| void *ext_lnno; |
| struct internal_lineno int_lnno; |
| unsigned int limit_offset; |
| bfd *abfd; |
| int linesz; |
| |
| if (endoffset == 0 && startaddr == 0 && endaddr == 0) |
| return; |
| curoffset = beginoffset; |
| limit_offset = XCOFF_DATA (objfile)->max_lineno_offset; |
| |
| if (endoffset != 0) |
| { |
| if (endoffset >= limit_offset) |
| { |
| complaint (_("Bad line table offset in C_EINCL directive")); |
| return; |
| } |
| limit_offset = endoffset; |
| } |
| else |
| limit_offset -= 1; |
| |
| abfd = objfile->obfd.get (); |
| linesz = coff_data (abfd)->local_linesz; |
| ext_lnno = alloca (linesz); |
| |
| while (curoffset <= limit_offset) |
| { |
| if (bfd_seek (abfd, curoffset, SEEK_SET) != 0 |
| || bfd_read (ext_lnno, linesz, abfd) != linesz) |
| return; |
| bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno); |
| |
| /* Find the address this line represents. */ |
| addr = (int_lnno.l_lnno |
| ? int_lnno.l_addr.l_paddr |
| : read_symbol_nvalue (int_lnno.l_addr.l_symndx)); |
| addr += objfile->text_section_offset (); |
| |
| if (addr < startaddr || (endaddr && addr >= endaddr)) |
| return; |
| |
| CORE_ADDR record_addr = (gdbarch_addr_bits_remove (gdbarch, addr) |
| - objfile->text_section_offset ()); |
| if (int_lnno.l_lnno == 0) |
| { |
| *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); |
| record_line (subfile, 0, unrelocated_addr (record_addr)); |
| --(*firstLine); |
| } |
| else |
| record_line (subfile, *firstLine + int_lnno.l_lnno, |
| unrelocated_addr (record_addr)); |
| curoffset += linesz; |
| } |
| } |
| |
| |
| /* Save the vital information for use when closing off the current file. |
| NAME is the file name the symbols came from, START_ADDR is the first |
| text address for the file, and SIZE is the number of bytes of text. */ |
| |
| #define complete_symtab(name, start_addr) { \ |
| set_last_source_file (name); \ |
| set_last_source_start_addr (start_addr); \ |
| } |
| |
| |
| /* Refill the symbol table input buffer |
| and set the variables that control fetching entries from it. |
| Reports an error if no data available. |
| This function can read past the end of the symbol table |
| (into the string table) but this does no harm. */ |
| |
| /* Create a new minimal symbol (using record_with_info). |
| |
| Creation of all new minimal symbols should go through this function |
| rather than calling the various record functions in order |
| to make sure that all symbol addresses get properly relocated. |
| |
| Arguments are: |
| |
| NAME - the symbol's name (but if NAME starts with a period, that |
| leading period is discarded). |
| ADDRESS - the symbol's address, prior to relocation. This function |
| relocates the address before recording the minimal symbol. |
| MS_TYPE - the symbol's type. |
| N_SCNUM - the symbol's XCOFF section number. |
| OBJFILE - the objfile associated with the minimal symbol. */ |
| |
| static void |
| record_minimal_symbol (minimal_symbol_reader &reader, |
| const char *name, unrelocated_addr address, |
| enum minimal_symbol_type ms_type, |
| int n_scnum, |
| struct objfile *objfile) |
| { |
| if (name[0] == '.') |
| ++name; |
| |
| reader.record_with_info (name, address, ms_type, |
| secnum_to_section (n_scnum, objfile)); |
| } |
| |
| /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be |
| nested. At any given time, a symbol can only be in one static block. |
| This is the base address of current static block, zero if non exists. */ |
| |
| static int static_block_base = 0; |
| |
| /* Section number for the current static block. */ |
| |
| static int static_block_section = -1; |
| |
| /* true if space for symbol name has been allocated. */ |
| |
| static int symname_alloced = 0; |
| |
| /* Next symbol to read. Pointer into raw seething symbol table. */ |
| |
| static char *raw_symbol; |
| |
| /* This is the function which stabsread.c calls to get symbol |
| continuations. */ |
| |
| static const char * |
| xcoff_next_symbol_text (struct objfile *objfile) |
| { |
| struct internal_syment symbol; |
| const char *retval; |
| |
| /* FIXME: is this the same as the passed arg? */ |
| if (this_symtab_objfile) |
| objfile = this_symtab_objfile; |
| |
| bfd_coff_swap_sym_in (objfile->obfd.get (), raw_symbol, &symbol); |
| if (symbol.n_zeroes) |
| { |
| complaint (_("Unexpected symbol continuation")); |
| |
| /* Return something which points to '\0' and hope the symbol reading |
| code does something reasonable. */ |
| retval = ""; |
| } |
| else if (symbol.n_sclass & 0x80) |
| { |
| retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset; |
| raw_symbol += coff_data (objfile->obfd)->local_symesz; |
| ++symnum; |
| } |
| else |
| { |
| complaint (_("Unexpected symbol continuation")); |
| |
| /* Return something which points to '\0' and hope the symbol reading |
| code does something reasonable. */ |
| retval = ""; |
| } |
| return retval; |
| } |
| |
| /* Read symbols for a given partial symbol table. */ |
| |
| static void |
| read_xcoff_symtab (struct objfile *objfile, legacy_psymtab *pst) |
| { |
| bfd *abfd = objfile->obfd.get (); |
| char *raw_auxptr; /* Pointer to first raw aux entry for sym. */ |
| struct xcoff_symfile_info *xcoff = XCOFF_DATA (objfile); |
| char *strtbl = xcoff->strtbl; |
| char *debugsec = xcoff->debugsec; |
| const char *debugfmt = bfd_xcoff_is_xcoff64 (abfd) ? "XCOFF64" : "XCOFF"; |
| |
| struct internal_syment symbol[1]; |
| union internal_auxent main_aux; |
| struct xcoff_symbol cs[1]; |
| CORE_ADDR file_start_addr = 0; |
| CORE_ADDR file_end_addr = 0; |
| |
| int next_file_symnum = -1; |
| unsigned int max_symnum; |
| int just_started = 1; |
| int depth = 0; |
| CORE_ADDR fcn_start_addr = 0; |
| enum language pst_symtab_language; |
| |
| struct xcoff_symbol fcn_stab_saved = { 0 }; |
| |
| /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| union internal_auxent fcn_aux_saved {}; |
| struct context_stack *newobj; |
| |
| const char *filestring = pst->filename; /* Name of the current file. */ |
| |
| const char *last_csect_name; /* Last seen csect's name. */ |
| |
| this_symtab_psymtab = pst; |
| this_symtab_objfile = objfile; |
| |
| /* Get the appropriate COFF "constants" related to the file we're |
| handling. */ |
| local_symesz = coff_data (abfd)->local_symesz; |
| |
| set_last_source_file (NULL); |
| last_csect_name = 0; |
| pst_symtab_language = deduce_language_from_filename (filestring); |
| |
| start_stabs (); |
| start_compunit_symtab (objfile, filestring, NULL, file_start_addr, |
| pst_symtab_language); |
| record_debugformat (debugfmt); |
| symnum = ((struct xcoff_symloc *) pst->read_symtab_private)->first_symnum; |
| max_symnum = |
| symnum + ((struct xcoff_symloc *) pst->read_symtab_private)->numsyms; |
| first_object_file_end = 0; |
| |
| raw_symbol = xcoff->symtbl + symnum * local_symesz; |
| |
| while (symnum < max_symnum) |
| { |
| QUIT; /* make this command interruptable. */ |
| |
| /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */ |
| /* read one symbol into `cs' structure. After processing the |
| whole symbol table, only string table will be kept in memory, |
| symbol table and debug section of xcoff will be freed. Thus |
| we can mark symbols with names in string table as |
| `alloced'. */ |
| { |
| int ii; |
| |
| /* Swap and align the symbol into a reasonable C structure. */ |
| bfd_coff_swap_sym_in (abfd, raw_symbol, symbol); |
| |
| cs->c_symnum = symnum; |
| cs->c_naux = symbol->n_numaux; |
| if (symbol->n_zeroes) |
| { |
| symname_alloced = 0; |
| /* We must use the original, unswapped, name here so the name field |
| pointed to by cs->c_name will persist throughout xcoffread. If |
| we use the new field, it gets overwritten for each symbol. */ |
| cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name; |
| /* If it's exactly E_SYMNMLEN characters long it isn't |
| '\0'-terminated. */ |
| if (cs->c_name[E_SYMNMLEN - 1] != '\0') |
| { |
| char *p; |
| |
| p = (char *) obstack_alloc (&objfile->objfile_obstack, |
| E_SYMNMLEN + 1); |
| strncpy (p, cs->c_name, E_SYMNMLEN); |
| p[E_SYMNMLEN] = '\0'; |
| cs->c_name = p; |
| symname_alloced = 1; |
| } |
| } |
| else if (symbol->n_sclass & 0x80) |
| { |
| cs->c_name = debugsec + symbol->n_offset; |
| symname_alloced = 0; |
| } |
| else |
| { |
| /* in string table */ |
| cs->c_name = strtbl + (int) symbol->n_offset; |
| symname_alloced = 1; |
| } |
| cs->c_value = symbol->n_value; |
| cs->c_sclass = symbol->n_sclass; |
| cs->c_secnum = symbol->n_scnum; |
| cs->c_type = (unsigned) symbol->n_type; |
| |
| raw_symbol += local_symesz; |
| ++symnum; |
| |
| /* Save addr of first aux entry. */ |
| raw_auxptr = raw_symbol; |
| |
| /* Skip all the auxents associated with this symbol. */ |
| for (ii = symbol->n_numaux; ii; --ii) |
| { |
| raw_symbol += coff_data (abfd)->local_auxesz; |
| ++symnum; |
| } |
| } |
| |
| /* if symbol name starts with ".$" or "$", ignore it. */ |
| if (cs->c_name[0] == '$' |
| || (cs->c_name[1] == '$' && cs->c_name[0] == '.')) |
| continue; |
| |
| if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) |
| { |
| if (get_last_source_file ()) |
| { |
| pst->compunit_symtab = end_compunit_symtab (cur_src_end_addr); |
| end_stabs (); |
| } |
| |
| start_stabs (); |
| start_compunit_symtab (objfile, "_globals_", NULL, |
| 0, pst_symtab_language); |
| record_debugformat (debugfmt); |
| cur_src_end_addr = first_object_file_end; |
| /* Done with all files, everything from here on is globals. */ |
| } |
| |
| if (cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT || |
| cs->c_sclass == C_WEAKEXT) |
| { |
| /* Dealing with a symbol with a csect entry. */ |
| |
| #define CSECT(PP) ((PP)->x_csect) |
| #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.u64) |
| #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp)) |
| #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp)) |
| #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas) |
| |
| /* Convert the auxent to something we can access. |
| XCOFF can have more than one auxiliary entries. |
| |
| Actual functions will have two auxiliary entries, one to have the |
| function size and other to have the smtype/smclass (LD/PR). |
| |
| c_type value of main symbol table will be set only in case of |
| C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols. |
| Bit 10 of type is set if symbol is a function, ie the value is set |
| to 32(0x20). So we need to read the first function auxiliary entry |
| which contains the size. */ |
| if (cs->c_naux > 1 && ISFCN (cs->c_type)) |
| { |
| /* a function entry point. */ |
| |
| fcn_start_addr = cs->c_value; |
| |
| /* save the function header info, which will be used |
| when `.bf' is seen. */ |
| fcn_cs_saved = *cs; |
| |
| /* Convert the auxent to something we can access. */ |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &fcn_aux_saved); |
| continue; |
| } |
| /* Read the csect auxiliary header, which is always the last by |
| convention. */ |
| bfd_coff_swap_aux_in (abfd, |
| raw_auxptr |
| + ((coff_data (abfd)->local_symesz) |
| * (cs->c_naux - 1)), |
| cs->c_type, cs->c_sclass, |
| cs->c_naux - 1, cs->c_naux, |
| &main_aux); |
| |
| switch (CSECT_SMTYP (&main_aux)) |
| { |
| |
| case XTY_ER: |
| /* Ignore all external references. */ |
| continue; |
| |
| case XTY_SD: |
| /* A section description. */ |
| { |
| switch (CSECT_SCLAS (&main_aux)) |
| { |
| |
| case XMC_PR: |
| { |
| |
| /* A program csect is seen. We have to allocate one |
| symbol table for each program csect. Normally gdb |
| prefers one symtab for each source file. In case |
| of AIX, one source file might include more than one |
| [PR] csect, and they don't have to be adjacent in |
| terms of the space they occupy in memory. Thus, one |
| single source file might get fragmented in the |
| memory and gdb's file start and end address |
| approach does not work! GCC (and I think xlc) seem |
| to put all the code in the unnamed program csect. */ |
| |
| if (last_csect_name) |
| { |
| complete_symtab (filestring, file_start_addr); |
| cur_src_end_addr = file_end_addr; |
| end_compunit_symtab (file_end_addr); |
| end_stabs (); |
| start_stabs (); |
| /* Give all csects for this source file the same |
| name. */ |
| start_compunit_symtab (objfile, filestring, NULL, |
| 0, pst_symtab_language); |
| record_debugformat (debugfmt); |
| } |
| |
| /* If this is the very first csect seen, |
| basically `__start'. */ |
| if (just_started) |
| { |
| first_object_file_end |
| = cs->c_value + CSECT_LEN (&main_aux); |
| just_started = 0; |
| } |
| |
| file_start_addr = |
| cs->c_value + objfile->text_section_offset (); |
| file_end_addr = file_start_addr + CSECT_LEN (&main_aux); |
| |
| if (cs->c_name && (cs->c_name[0] == '.' || cs->c_name[0] == '@')) |
| last_csect_name = cs->c_name; |
| } |
| continue; |
| |
| /* All other symbols are put into the minimal symbol |
| table only. */ |
| |
| case XMC_RW: |
| continue; |
| |
| case XMC_TC0: |
| continue; |
| |
| case XMC_TC: |
| continue; |
| |
| default: |
| /* Ignore the symbol. */ |
| continue; |
| } |
| } |
| break; |
| |
| case XTY_LD: |
| |
| switch (CSECT_SCLAS (&main_aux)) |
| { |
| /* We never really come to this part as this case has been |
| handled in ISFCN check above. |
| This and other cases of XTY_LD are kept just for |
| reference. */ |
| case XMC_PR: |
| continue; |
| |
| case XMC_GL: |
| /* shared library function trampoline code entry point. */ |
| continue; |
| |
| case XMC_DS: |
| /* The symbols often have the same names as debug symbols for |
| functions, and confuse lookup_symbol. */ |
| continue; |
| |
| default: |
| /* xlc puts each variable in a separate csect, so we get |
| an XTY_SD for each variable. But gcc puts several |
| variables in a csect, so that each variable only gets |
| an XTY_LD. This will typically be XMC_RW; I suspect |
| XMC_RO and XMC_BS might be possible too. |
| These variables are put in the minimal symbol table |
| only. */ |
| continue; |
| } |
| break; |
| |
| case XTY_CM: |
| /* Common symbols are put into the minimal symbol table only. */ |
| continue; |
| |
| default: |
| break; |
| } |
| } |
| |
| switch (cs->c_sclass) |
| { |
| case C_FILE: |
| |
| /* c_value field contains symnum of next .file entry in table |
| or symnum of first global after last .file. */ |
| |
| next_file_symnum = cs->c_value; |
| |
| /* Complete symbol table for last object file containing |
| debugging information. */ |
| |
| /* Whether or not there was a csect in the previous file, we |
| have to call `end_stabs' and `start_stabs' to reset |
| type_vector, line_vector, etc. structures. */ |
| |
| complete_symtab (filestring, file_start_addr); |
| cur_src_end_addr = file_end_addr; |
| end_compunit_symtab (file_end_addr); |
| end_stabs (); |
| |
| /* XCOFF, according to the AIX 3.2 documentation, puts the |
| filename in cs->c_name. But xlc 1.3.0.2 has decided to |
| do things the standard COFF way and put it in the auxent. |
| We use the auxent if the symbol is ".file" and an auxent |
| exists, otherwise use the symbol itself. Simple |
| enough. */ |
| if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0) |
| { |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &main_aux); |
| filestring = coff_getfilename (&main_aux, objfile); |
| } |
| else |
| filestring = cs->c_name; |
| |
| start_stabs (); |
| start_compunit_symtab (objfile, filestring, NULL, 0, |
| pst_symtab_language); |
| record_debugformat (debugfmt); |
| last_csect_name = 0; |
| |
| /* reset file start and end addresses. A compilation unit |
| with no text (only data) should have zero file |
| boundaries. */ |
| file_start_addr = file_end_addr = 0; |
| break; |
| |
| case C_FUN: |
| fcn_stab_saved = *cs; |
| break; |
| |
| case C_FCN: |
| if (strcmp (cs->c_name, ".bf") == 0) |
| { |
| CORE_ADDR off = objfile->text_section_offset (); |
| |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &main_aux); |
| |
| within_function = 1; |
| |
| newobj = push_context (0, fcn_start_addr + off); |
| |
| newobj->name = define_symbol |
| (fcn_cs_saved.c_value + off, |
| fcn_stab_saved.c_name, 0, 0, objfile); |
| if (newobj->name != NULL) |
| newobj->name->set_section_index (SECT_OFF_TEXT (objfile)); |
| } |
| else if (strcmp (cs->c_name, ".ef") == 0) |
| { |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &main_aux); |
| |
| /* The value of .ef is the address of epilogue code; |
| not useful for gdb. */ |
| /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno |
| contains number of lines to '}' */ |
| |
| if (outermost_context_p ()) |
| { /* We attempted to pop an empty context stack. */ |
| ef_complaint (cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| struct context_stack cstk = pop_context (); |
| /* Stack must be empty now. */ |
| if (!outermost_context_p ()) |
| { |
| ef_complaint (cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| |
| finish_block (cstk.name, cstk.old_blocks, |
| NULL, cstk.start_addr, |
| (fcn_cs_saved.c_value |
| + fcn_aux_saved.x_sym.x_misc.x_fsize |
| + objfile->text_section_offset ())); |
| within_function = 0; |
| } |
| break; |
| |
| case C_BSTAT: |
| /* Begin static block. */ |
| { |
| struct internal_syment static_symbol; |
| |
| read_symbol (&static_symbol, cs->c_value); |
| static_block_base = static_symbol.n_value; |
| static_block_section = |
| secnum_to_section (static_symbol.n_scnum, objfile); |
| } |
| break; |
| |
| case C_ESTAT: |
| /* End of static block. */ |
| static_block_base = 0; |
| static_block_section = -1; |
| break; |
| |
| case C_ARG: |
| case C_REGPARM: |
| case C_REG: |
| case C_TPDEF: |
| case C_STRTAG: |
| case C_UNTAG: |
| case C_ENTAG: |
| { |
| complaint (_("Unrecognized storage class %d."), |
| cs->c_sclass); |
| } |
| break; |
| |
| case C_LABEL: |
| case C_NULL: |
| /* Ignore these. */ |
| break; |
| |
| case C_HIDEXT: |
| case C_STAT: |
| break; |
| |
| case C_BINCL: |
| /* beginning of include file */ |
| /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted |
| order. Thus, when wee see them, we might not know enough info |
| to process them. Thus, we'll be saving them into a table |
| (inclTable) and postpone their processing. */ |
| |
| record_include_begin (cs); |
| break; |
| |
| case C_EINCL: |
| /* End of include file. */ |
| /* See the comment after case C_BINCL. */ |
| record_include_end (cs); |
| break; |
| |
| case C_BLOCK: |
| if (strcmp (cs->c_name, ".bb") == 0) |
| { |
| depth++; |
| newobj = push_context (depth, |
| (cs->c_value |
| + objfile->text_section_offset ())); |
| } |
| else if (strcmp (cs->c_name, ".eb") == 0) |
| { |
| if (outermost_context_p ()) |
| { /* We attempted to pop an empty context stack. */ |
| eb_complaint (cs->c_symnum); |
| break; |
| } |
| struct context_stack cstk = pop_context (); |
| if (depth-- != cstk.depth) |
| { |
| eb_complaint (cs->c_symnum); |
| break; |
| } |
| if (*get_local_symbols () && !outermost_context_p ()) |
| { |
| /* Make a block for the local symbols within. */ |
| finish_block (cstk.name, |
| cstk.old_blocks, NULL, |
| cstk.start_addr, |
| (cs->c_value |
| + objfile->text_section_offset ())); |
| } |
| *get_local_symbols () = cstk.locals; |
| } |
| break; |
| |
| default: |
| process_xcoff_symbol (cs, objfile); |
| break; |
| } |
| } |
| |
| if (get_last_source_file ()) |
| { |
| struct compunit_symtab *cust; |
| |
| complete_symtab (filestring, file_start_addr); |
| cur_src_end_addr = file_end_addr; |
| cust = end_compunit_symtab (file_end_addr); |
| /* When reading symbols for the last C_FILE of the objfile, try |
| to make sure that we set pst->compunit_symtab to the symtab for the |
| file, not to the _globals_ symtab. I'm not sure whether this |
| actually works right or when/if it comes up. */ |
| if (pst->compunit_symtab == NULL) |
| pst->compunit_symtab = cust; |
| end_stabs (); |
| } |
| } |
| |
| #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \ |
| (NAME))) |
| |
| |
| /* process one xcoff symbol. */ |
| |
| static struct symbol * |
| process_xcoff_symbol (struct xcoff_symbol *cs, struct objfile *objfile) |
| { |
| struct symbol onesymbol; |
| struct symbol *sym = &onesymbol; |
| struct symbol *sym2 = NULL; |
| char *name, *pp; |
| |
| int sec; |
| CORE_ADDR off; |
| |
| if (cs->c_secnum < 0) |
| { |
| /* The value is a register number, offset within a frame, etc., |
| and does not get relocated. */ |
| off = 0; |
| sec = -1; |
| } |
| else |
| { |
| sec = secnum_to_section (cs->c_secnum, objfile); |
| off = objfile->section_offsets[sec]; |
| } |
| |
| name = cs->c_name; |
| if (name[0] == '.') |
| ++name; |
| |
| /* default assumptions */ |
| sym->set_value_address (cs->c_value + off); |
| sym->set_domain (VAR_DOMAIN); |
| sym->set_section_index (secnum_to_section (cs->c_secnum, objfile)); |
| |
| if (ISFCN (cs->c_type)) |
| { |
| /* At this point, we don't know the type of the function. This |
| will be patched with the type from its stab entry later on in |
| patch_block_stabs (), unless the file was compiled without -g. */ |
| |
| sym->set_linkage_name (SYMNAME_ALLOC (name, symname_alloced)); |
| sym->set_type (builtin_type (objfile)->nodebug_text_symbol); |
| |
| sym->set_domain (FUNCTION_DOMAIN); |
| sym->set_aclass_index (LOC_BLOCK); |
| sym2 = new (&objfile->objfile_obstack) symbol (*sym); |
| |
| if (cs->c_sclass == C_EXT || C_WEAKEXT) |
| add_symbol_to_list (sym2, get_global_symbols ()); |
| else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| add_symbol_to_list (sym2, get_file_symbols ()); |
| } |
| else |
| { |
| /* In case we can't figure out the type, provide default. */ |
| sym->set_type (builtin_type (objfile)->nodebug_data_symbol); |
| |
| switch (cs->c_sclass) |
| { |
| #if 0 |
| /* The values of functions and global symbols are now resolved |
| via the global_sym_chain in stabsread.c. */ |
| case C_FUN: |
| if (fcn_cs_saved.c_sclass == C_EXT) |
| add_stab_to_list (name, &global_stabs); |
| else |
| add_stab_to_list (name, &file_stabs); |
| break; |
| |
| case C_GSYM: |
| add_stab_to_list (name, &global_stabs); |
| break; |
| #endif |
| |
| case C_BCOMM: |
| common_block_start (cs->c_name, objfile); |
| break; |
| |
| case C_ECOMM: |
| common_block_end (objfile); |
| break; |
| |
| default: |
| complaint (_("Unexpected storage class: %d"), |
| cs->c_sclass); |
| [[fallthrough]]; |
| |
| case C_DECL: |
| case C_PSYM: |
| case C_RPSYM: |
| case C_ECOML: |
| case C_LSYM: |
| case C_RSYM: |
| case C_GSYM: |
| |
| { |
| sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile); |
| if (sym != NULL) |
| { |
| sym->set_section_index (sec); |
| } |
| return sym; |
| } |
| |
| case C_STSYM: |
| |
| /* For xlc (not GCC), the 'V' symbol descriptor is used for |
| all statics and we need to distinguish file-scope versus |
| function-scope using within_function. We do this by |
| changing the string we pass to define_symbol to use 'S' |
| where we need to, which is not necessarily super-clean, |
| but seems workable enough. */ |
| |
| if (*name == ':') |
| return NULL; |
| |
| pp = strchr (name, ':'); |
| if (pp == NULL) |
| return NULL; |
| |
| ++pp; |
| if (*pp == 'V' && !within_function) |
| *pp = 'S'; |
| sym = define_symbol ((cs->c_value |
| + objfile->section_offsets[static_block_section]), |
| cs->c_name, 0, 0, objfile); |
| if (sym != NULL) |
| { |
| sym->set_value_address |
| (sym->value_address () + static_block_base); |
| sym->set_section_index (static_block_section); |
| } |
| return sym; |
| |
| } |
| } |
| return sym2; |
| } |
| |
| /* Extract the file name from the aux entry of a C_FILE symbol. |
| Result is in static storage and is only good for temporary use. */ |
| |
| static char * |
| coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile) |
| { |
| static char buffer[BUFSIZ]; |
| |
| if (aux_entry->x_file.x_n.x_n.x_zeroes == 0) |
| strcpy (buffer, (XCOFF_DATA (objfile)->strtbl |
| + aux_entry->x_file.x_n.x_n.x_offset)); |
| else |
| { |
| size_t x_fname_len = sizeof (aux_entry->x_file.x_n.x_fname); |
| strncpy (buffer, aux_entry->x_file.x_n.x_fname, x_fname_len); |
| buffer[x_fname_len] = '\0'; |
| } |
| return (buffer); |
| } |
| |
| /* Set *SYMBOL to symbol number symno in symtbl. */ |
| static void |
| read_symbol (struct internal_syment *symbol, int symno) |
| { |
| struct xcoff_symfile_info *xcoff = XCOFF_DATA (this_symtab_objfile); |
| int nsyms = xcoff->symtbl_num_syms; |
| char *stbl = xcoff->symtbl; |
| |
| if (symno < 0 || symno >= nsyms) |
| { |
| complaint (_("Invalid symbol offset")); |
| symbol->n_value = 0; |
| symbol->n_scnum = -1; |
| return; |
| } |
| bfd_coff_swap_sym_in (this_symtab_objfile->obfd.get (), |
| stbl + (symno * local_symesz), |
| symbol); |
| } |
| |
| /* Get value corresponding to symbol number symno in symtbl. */ |
| |
| static CORE_ADDR |
| read_symbol_nvalue (int symno) |
| { |
| struct internal_syment symbol[1]; |
| |
| read_symbol (symbol, symno); |
| return symbol->n_value; |
| } |
| |
| |
| /* Find the address of the function corresponding to symno, where |
| symno is the symbol pointed to by the linetable. */ |
| |
| static int |
| read_symbol_lineno (int symno) |
| { |
| struct objfile *objfile = this_symtab_objfile; |
| int xcoff64 = bfd_xcoff_is_xcoff64 (objfile->obfd); |
| |
| struct xcoff_symfile_info *info = XCOFF_DATA (objfile); |
| int nsyms = info->symtbl_num_syms; |
| char *stbl = info->symtbl; |
| char *strtbl = info->strtbl; |
| |
| struct internal_syment symbol[1]; |
| union internal_auxent main_aux[1]; |
| |
| if (symno < 0) |
| { |
| bf_notfound_complaint (); |
| return 0; |
| } |
| |
| /* Note that just searching for a short distance (e.g. 50 symbols) |
| is not enough, at least in the following case. |
| |
| .extern foo |
| [many .stabx entries] |
| [a few functions, referring to foo] |
| .globl foo |
| .bf |
| |
| What happens here is that the assembler moves the .stabx entries |
| to right before the ".bf" for foo, but the symbol for "foo" is before |
| all the stabx entries. See PR gdb/2222. */ |
| |
| /* Maintaining a table of .bf entries might be preferable to this search. |
| If I understand things correctly it would need to be done only for |
| the duration of a single psymtab to symtab conversion. */ |
| while (symno < nsyms) |
| { |
| bfd_coff_swap_sym_in (symfile_bfd, |
| stbl + (symno * local_symesz), symbol); |
| if (symbol->n_sclass == C_FCN) |
| { |
| char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name; |
| |
| if (strcmp (name, ".bf") == 0) |
| goto gotit; |
| } |
| symno += symbol->n_numaux + 1; |
| } |
| |
| bf_notfound_complaint (); |
| return 0; |
| |
| gotit: |
| /* Take aux entry and return its lineno. */ |
| symno++; |
| bfd_coff_swap_aux_in (objfile->obfd.get (), stbl + symno * local_symesz, |
| symbol->n_type, symbol->n_sclass, |
| 0, symbol->n_numaux, main_aux); |
| |
| return main_aux->x_sym.x_misc.x_lnsz.x_lnno; |
| } |
| |
| /* Support for line number handling. */ |
| |
| /* This function is called for every section; it finds the outer limits |
| * of the line table (minimum and maximum file offset) so that the |
| * mainline code can read the whole thing for efficiency. |
| */ |
| static void |
| find_linenos (struct bfd *abfd, struct bfd_section *asect, void *vpinfo) |
| { |
| struct xcoff_symfile_info *info; |
| int size, count; |
| file_ptr offset, maxoff; |
| |
| count = asect->lineno_count; |
| |
| if (strcmp (asect->name, ".text") != 0 || count == 0) |
| return; |
| |
| size = count * coff_data (abfd)->local_linesz; |
| info = (struct xcoff_symfile_info *) vpinfo; |
| offset = asect->line_filepos; |
| maxoff = offset + size; |
| |
| if (offset < info->min_lineno_offset || info->min_lineno_offset == 0) |
| info->min_lineno_offset = offset; |
| |
| if (maxoff > info->max_lineno_offset) |
| info->max_lineno_offset = maxoff; |
| } |
| |
| static void |
| xcoff_expand_psymtab (legacy_psymtab *pst, struct objfile *objfile) |
| { |
| gdb_assert (!pst->readin); |
| |
| /* Read in all partial symtabs on which this one is dependent. */ |
| pst->expand_dependencies (objfile); |
| |
| if (((struct xcoff_symloc *) pst->read_symtab_private)->numsyms != 0) |
| { |
| /* Init stuff necessary for reading in symbols. */ |
| stabsread_init (); |
| |
| scoped_free_pendings free_pending; |
| read_xcoff_symtab (objfile, pst); |
| } |
| |
| pst->readin = true; |
| } |
| |
| /* Read in all of the symbols for a given psymtab for real. |
| Be verbose about it if the user wants that. SELF is not NULL. */ |
| |
| static void |
| xcoff_read_symtab (legacy_psymtab *self, struct objfile *objfile) |
| { |
| gdb_assert (!self->readin); |
| |
| if (((struct xcoff_symloc *) self->read_symtab_private)->numsyms != 0 |
| || self->number_of_dependencies) |
| { |
| next_symbol_text_func = xcoff_next_symbol_text; |
| |
| self->expand_psymtab (objfile); |
| |
| /* Match with global symbols. This only needs to be done once, |
| after all of the symtabs and dependencies have been read in. */ |
| scan_file_globals (objfile); |
| } |
| } |
| |
| static void |
| xcoff_new_init (struct objfile *objfile) |
| { |
| stabsread_new_init (); |
| } |
| |
| /* Do initialization in preparation for reading symbols from OBJFILE. |
| |
| We will only be called if this is an XCOFF or XCOFF-like file. |
| BFD handles figuring out the format of the file, and code in symfile.c |
| uses BFD's determination to vector to us. */ |
| |
| static void |
| xcoff_symfile_init (struct objfile *objfile) |
| { |
| /* Allocate struct to keep track of the symfile. */ |
| xcoff_objfile_data_key.emplace (objfile); |
| } |
| |
| /* Perform any local cleanups required when we are done with a particular |
| objfile. I.E, we are in the process of discarding all symbol information |
| for an objfile, freeing up all memory held for it, and unlinking the |
| objfile struct from the global list of known objfiles. */ |
| |
| static void |
| xcoff_symfile_finish (struct objfile *objfile) |
| { |
| /* Start with a fresh include table for the next objfile. */ |
| if (inclTable) |
| { |
| xfree (inclTable); |
| inclTable = NULL; |
| delete main_subfile; |
| } |
| inclIndx = inclLength = inclDepth = 0; |
| } |
| |
| |
| static void |
| init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile) |
| { |
| long length; |
| int val; |
| unsigned char lengthbuf[4]; |
| char *strtbl; |
| struct xcoff_symfile_info *xcoff = XCOFF_DATA (objfile); |
| |
| xcoff->strtbl = NULL; |
| |
| if (bfd_seek (abfd, offset, SEEK_SET) < 0) |
| error (_("cannot seek to string table in %s: %s"), |
| bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| |
| val = bfd_read ((char *) lengthbuf, sizeof lengthbuf, abfd); |
| length = bfd_h_get_32 (abfd, lengthbuf); |
| |
| /* If no string table is needed, then the file may end immediately |
| after the symbols. Just return with `strtbl' set to NULL. */ |
| |
| if (val != sizeof lengthbuf || length < sizeof lengthbuf) |
| return; |
| |
| /* Allocate string table from objfile_obstack. We will need this table |
| as long as we have its symbol table around. */ |
| |
| strtbl = (char *) obstack_alloc (&objfile->objfile_obstack, length); |
| xcoff->strtbl = strtbl; |
| |
| /* Copy length buffer, the first byte is usually zero and is |
| used for stabs with a name length of zero. */ |
| memcpy (strtbl, lengthbuf, sizeof lengthbuf); |
| if (length == sizeof lengthbuf) |
| return; |
| |
| val = bfd_read (strtbl + sizeof lengthbuf, length - sizeof lengthbuf, abfd); |
| |
| if (val != length - sizeof lengthbuf) |
| error (_("cannot read string table from %s: %s"), |
| bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ())); |
| if (strtbl[length - 1] != '\0') |
| error (_("bad symbol file: string table " |
| "does not end with null character")); |
| |
| return; |
| } |
| |
| /* If we have not yet seen a function for this psymtab, this is 0. If we |
| have seen one, it is the offset in the line numbers of the line numbers |
| for the psymtab. */ |
| static unsigned int first_fun_line_offset; |
| |
| /* Allocate and partially fill a partial symtab. It will be |
| completely filled at the end of the symbol list. |
| |
| SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR |
| is the address relative to which its symbols are (incremental) or 0 |
| (normal). */ |
| |
| static legacy_psymtab * |
| xcoff_start_psymtab (psymtab_storage *partial_symtabs, |
| struct objfile *objfile, |
| const char *filename, int first_symnum) |
| { |
| /* We fill in textlow later. */ |
| legacy_psymtab *result = new legacy_psymtab (filename, partial_symtabs, |
| objfile->per_bfd, |
| unrelocated_addr (0)); |
| |
| result->read_symtab_private = |
| XOBNEW (&objfile->objfile_obstack, struct xcoff_symloc); |
| ((struct xcoff_symloc *) result->read_symtab_private)->first_symnum = first_symnum; |
| result->legacy_read_symtab = xcoff_read_symtab; |
| result->legacy_expand_psymtab = xcoff_expand_psymtab; |
| |
| /* Deduce the source language from the filename for this psymtab. */ |
| psymtab_language = deduce_language_from_filename (filename); |
| |
| return result; |
| } |
| |
| /* Close off the current usage of PST. |
| Returns PST, or NULL if the partial symtab was empty and thrown away. |
| |
| CAPPING_SYMBOL_NUMBER is the end of pst (exclusive). |
| |
| INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES |
| are the information for includes and dependencies. */ |
| |
| static legacy_psymtab * |
| xcoff_end_psymtab (struct objfile *objfile, psymtab_storage *partial_symtabs, |
| legacy_psymtab *pst, |
| const char **include_list, int num_includes, |
| int capping_symbol_number, |
| legacy_psymtab **dependency_list, |
| int number_dependencies, int textlow_not_set) |
| { |
| int i; |
| |
| if (capping_symbol_number != -1) |
| ((struct xcoff_symloc *) pst->read_symtab_private)->numsyms = |
| capping_symbol_number |
| - ((struct xcoff_symloc *) pst->read_symtab_private)->first_symnum; |
| ((struct xcoff_symloc *) pst->read_symtab_private)->lineno_off = |
| first_fun_line_offset; |
| first_fun_line_offset = 0; |
| |
| pst->end (); |
| |
| pst->number_of_dependencies = number_dependencies; |
| if (number_dependencies) |
| { |
| pst->dependencies |
| = partial_symtabs->allocate_dependencies (number_dependencies); |
| memcpy (pst->dependencies, dependency_list, |
| number_dependencies * sizeof (legacy_psymtab *)); |
| } |
| else |
| pst->dependencies = 0; |
| |
| for (i = 0; i < num_includes; i++) |
| { |
| legacy_psymtab *subpst = |
| new legacy_psymtab (include_list[i], partial_symtabs, objfile->per_bfd); |
| |
| subpst->read_symtab_private = XOBNEW (&objfile->objfile_obstack, xcoff_symloc); |
| ((struct xcoff_symloc *) subpst->read_symtab_private)->first_symnum = 0; |
| ((struct xcoff_symloc *) subpst->read_symtab_private)->numsyms = 0; |
| |
| /* We could save slight bits of space by only making one of these, |
| shared by the entire set of include files. FIXME-someday. */ |
| subpst->dependencies = |
| partial_symtabs->allocate_dependencies (1); |
| subpst->dependencies[0] = pst; |
| subpst->number_of_dependencies = 1; |
| |
| subpst->legacy_read_symtab = pst->legacy_read_symtab; |
| subpst->legacy_expand_psymtab = pst->legacy_expand_psymtab; |
| } |
| |
| if (num_includes == 0 |
| && number_dependencies == 0 |
| && pst->empty ()) |
| { |
| /* Throw away this psymtab, it's empty. */ |
| /* Empty psymtabs happen as a result of header files which don't have |
| any symbols in them. There can be a lot of them. */ |
| |
| partial_symtabs->discard_psymtab (pst); |
| |
| /* Indicate that psymtab was thrown away. */ |
| pst = NULL; |
| } |
| return pst; |
| } |
| |
| /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in |
| *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over |
| the symbol and its auxents. */ |
| |
| static void |
| swap_sym (struct internal_syment *symbol, union internal_auxent *aux, |
| const char **name, char **raw, unsigned int *symnump, |
| struct objfile *objfile) |
| { |
| bfd_coff_swap_sym_in (objfile->obfd.get (), *raw, symbol); |
| if (symbol->n_zeroes) |
| { |
| /* If it's exactly E_SYMNMLEN characters long it isn't |
| '\0'-terminated. */ |
| if (symbol->n_name[E_SYMNMLEN - 1] != '\0') |
| { |
| /* FIXME: wastes memory for symbols which we don't end up putting |
| into the minimal symbols. */ |
| char *p; |
| |
| p = (char *) obstack_alloc (&objfile->objfile_obstack, |
| E_SYMNMLEN + 1); |
| strncpy (p, symbol->n_name, E_SYMNMLEN); |
| p[E_SYMNMLEN] = '\0'; |
| *name = p; |
| } |
| else |
| /* Point to the unswapped name as that persists as long as the |
| objfile does. */ |
| *name = ((struct external_syment *) *raw)->e.e_name; |
| } |
| else if (symbol->n_sclass & 0x80) |
| { |
| *name = XCOFF_DATA (objfile)->debugsec + symbol->n_offset; |
| } |
| else |
| { |
| *name = XCOFF_DATA (objfile)->strtbl + symbol->n_offset; |
| } |
| ++*symnump; |
| *raw += coff_data (objfile->obfd)->local_symesz; |
| if (symbol->n_numaux > 0) |
| { |
| bfd_coff_swap_aux_in (objfile->obfd.get (), *raw, symbol->n_type, |
| symbol->n_sclass, 0, symbol->n_numaux, aux); |
| |
| *symnump += symbol->n_numaux; |
| *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux; |
| } |
| } |
| |
| static void |
| function_outside_compilation_unit_complaint (const char *arg1) |
| { |
| complaint (_("function `%s' appears to be defined " |
| "outside of all compilation units"), |
| arg1); |
| } |
| |
| static void |
| scan_xcoff_symtab (minimal_symbol_reader &reader, |
| psymtab_storage *partial_symtabs, |
| struct objfile *objfile) |
| { |
| CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ |
| const char *filestring = NULL; |
| |
| const char *namestring; |
| bfd *abfd; |
| asection *bfd_sect; |
| unsigned int nsyms; |
| |
| /* Current partial symtab */ |
| legacy_psymtab *pst; |
| |
| /* List of current psymtab's include files. */ |
| const char **psymtab_include_list; |
| int includes_allocated; |
| int includes_used; |
| |
| /* Index within current psymtab dependency list. */ |
| legacy_psymtab **dependency_list; |
| int dependencies_used, dependencies_allocated; |
| |
| char *sraw_symbol; |
| struct internal_syment symbol; |
| union internal_auxent main_aux[5]; |
| unsigned int ssymnum; |
| |
| const char *last_csect_name = NULL; /* Last seen csect's name and value. */ |
| unrelocated_addr last_csect_val = unrelocated_addr (0); |
| int last_csect_sec = 0; |
| int misc_func_recorded = 0; /* true if any misc. function. */ |
| int textlow_not_set = 1; |
| |
| pst = (legacy_psymtab *) 0; |
| |
| includes_allocated = 30; |
| includes_used = 0; |
| psymtab_include_list = (const char **) alloca (includes_allocated * |
| sizeof (const char *)); |
| |
| dependencies_allocated = 30; |
| dependencies_used = 0; |
| dependency_list = |
| (legacy_psymtab **) alloca (dependencies_allocated * |
| sizeof (legacy_psymtab *)); |
| |
| set_last_source_file (NULL); |
| |
| abfd = objfile->obfd.get (); |
| next_symbol_text_func = xcoff_next_symbol_text; |
| |
| sraw_symbol = XCOFF_DATA (objfile)->symtbl; |
| nsyms = XCOFF_DATA (objfile)->symtbl_num_syms; |
| ssymnum = 0; |
| while (ssymnum < nsyms) |
| { |
| int sclass; |
| |
| QUIT; |
| |
| bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol); |
| sclass = symbol.n_sclass; |
| |
| switch (sclass) |
| { |
| case C_EXT: |
| case C_HIDEXT: |
| case C_WEAKEXT: |
| { |
| /* The CSECT auxent--always the last auxent. */ |
| union internal_auxent csect_aux; |
| unsigned int symnum_before = ssymnum; |
| |
| swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| &ssymnum, objfile); |
| if (symbol.n_numaux > 1) |
| { |
| bfd_coff_swap_aux_in |
| (objfile->obfd.get (), |
| sraw_symbol - coff_data (abfd)->local_symesz, |
| symbol.n_type, |
| symbol.n_sclass, |
| symbol.n_numaux - 1, |
| symbol.n_numaux, |
| &csect_aux); |
| } |
| else |
| csect_aux = main_aux[0]; |
| |
| /* If symbol name starts with ".$" or "$", ignore it. */ |
| if (namestring[0] == '$' |
| || (namestring[0] == '.' && namestring[1] == '$')) |
| break; |
| |
| switch (csect_aux.x_csect.x_smtyp & 0x7) |
| { |
| case XTY_SD: |
| switch (csect_aux.x_csect.x_smclas) |
| { |
| case XMC_PR: |
| if (last_csect_name) |
| { |
| /* If no misc. function recorded in the last |
| seen csect, enter it as a function. This |
| will take care of functions like strcmp() |
| compiled by xlc. */ |
| |
| if (!misc_func_recorded) |
| { |
| record_minimal_symbol |
| (reader, last_csect_name, last_csect_val, |
| mst_text, last_csect_sec, objfile); |
| misc_func_recorded = 1; |
| } |
| |
| if (pst != NULL) |
| { |
| /* We have to allocate one psymtab for |
| each program csect, because their text |
| sections need not be adjacent. */ |
| xcoff_end_psymtab |
| (objfile, partial_symtabs, pst, psymtab_include_list, |
| includes_used, symnum_before, dependency_list, |
| dependencies_used, textlow_not_set); |
| includes_used = 0; |
| dependencies_used = 0; |
| /* Give all psymtabs for this source file the same |
| name. */ |
| pst = xcoff_start_psymtab |
| (partial_symtabs, objfile, |
| filestring, |
| symnum_before); |
| } |
| } |
| /* Activate the misc_func_recorded mechanism for |
| compiler- and linker-generated CSECTs like ".strcmp" |
| and "@FIX1". */ |
| if (namestring && (namestring[0] == '.' |
| || namestring[0] == '@')) |
| { |
| last_csect_name = namestring; |
| last_csect_val = unrelocated_addr (symbol.n_value); |
| last_csect_sec = symbol.n_scnum; |
| } |
| if (pst != NULL) |
| { |
| unrelocated_addr highval |
| = unrelocated_addr (symbol.n_value |
| + CSECT_LEN (&csect_aux)); |
| |
| if (highval > pst->unrelocated_text_high ()) |
| pst->set_text_high (highval); |
| unrelocated_addr loval |
| = unrelocated_addr (symbol.n_value); |
| if (!pst->text_low_valid |
| || loval < pst->unrelocated_text_low ()) |
| pst->set_text_low (loval); |
| } |
| misc_func_recorded = 0; |
| break; |
| |
| case XMC_RW: |
| case XMC_TD: |
| /* Data variables are recorded in the minimal symbol |
| table, except for section symbols. */ |
| if (*namestring != '.') |
| record_minimal_symbol |
| (reader, namestring, unrelocated_addr (symbol.n_value), |
| sclass == C_HIDEXT ? mst_file_data : mst_data, |
| symbol.n_scnum, objfile); |
| break; |
| |
| case XMC_TC0: |
| if (toc_offset) |
| warning (_("More than one XMC_TC0 symbol found.")); |
| toc_offset = symbol.n_value; |
| |
| /* Make TOC offset relative to start address of |
| section. */ |
| bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile); |
| if (bfd_sect) |
| toc_offset -= bfd_section_vma (bfd_sect); |
| break; |
| |
| case XMC_TC: |
| /* These symbols tell us where the TOC entry for a |
| variable is, not the variable itself. */ |
| break; |
| |
| default: |
| break; |
| } |
| break; |
| |
| case XTY_LD: |
| switch (csect_aux.x_csect.x_smclas) |
| { |
| case XMC_PR: |
| /* A function entry point. */ |
| |
| if (first_fun_line_offset == 0 && symbol.n_numaux > 1) |
| first_fun_line_offset = |
| main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr; |
| |
| record_minimal_symbol |
| (reader, namestring, unrelocated_addr (symbol.n_value), |
| sclass == C_HIDEXT ? mst_file_text : mst_text, |
| symbol.n_scnum, objfile); |
| misc_func_recorded = 1; |
| break; |
| |
| case XMC_GL: |
| /* shared library function trampoline code entry |
| point. */ |
| |
| /* record trampoline code entries as |
| mst_solib_trampoline symbol. When we lookup mst |
| symbols, we will choose mst_text over |
| mst_solib_trampoline. */ |
| record_minimal_symbol |
| (reader, namestring, unrelocated_addr (symbol.n_value), |
| mst_solib_trampoline, symbol.n_scnum, objfile); |
| misc_func_recorded = 1; |
| break; |
| |
| case XMC_DS: |
| /* The symbols often have the same names as |
| debug symbols for functions, and confuse |
| lookup_symbol. */ |
| break; |
| |
| default: |
| |
| /* xlc puts each variable in a separate csect, |
| so we get an XTY_SD for each variable. But |
| gcc puts several variables in a csect, so |
| that each variable only gets an XTY_LD. We |
| still need to record them. This will |
| typically be XMC_RW; I suspect XMC_RO and |
| XMC_BS might be possible too. */ |
| if (*namestring != '.') |
| record_minimal_symbol |
| (reader, namestring, unrelocated_addr (symbol.n_value), |
| sclass == C_HIDEXT ? mst_file_data : mst_data, |
| symbol.n_scnum, objfile); |
| break; |
| } |
| break; |
| |
| case XTY_CM: |
| switch (csect_aux.x_csect.x_smclas) |
| { |
| case XMC_RW: |
| case XMC_BS: |
| /* Common variables are recorded in the minimal symbol |
| table, except for section symbols. */ |
| if (*namestring != '.') |
| record_minimal_symbol |
| (reader, namestring, unrelocated_addr (symbol.n_value), |
| sclass == C_HIDEXT ? mst_file_bss : mst_bss, |
| symbol.n_scnum, objfile); |
| break; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| break; |
| case C_FILE: |
| { |
| unsigned int symnum_before; |
| |
| symnum_before = ssymnum; |
| swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| &ssymnum, objfile); |
| |
| /* See if the last csect needs to be recorded. */ |
| |
| if (last_csect_name && !misc_func_recorded) |
| { |
| /* If no misc. function recorded in the last seen csect, enter |
| it as a function. This will take care of functions like |
| strcmp() compiled by xlc. */ |
| |
| record_minimal_symbol (reader, last_csect_name, last_csect_val, |
| mst_text, last_csect_sec, objfile); |
| misc_func_recorded = 1; |
| } |
| |
| if (pst) |
| { |
| xcoff_end_psymtab (objfile, partial_symtabs, |
| pst, psymtab_include_list, |
| includes_used, symnum_before, |
| dependency_list, dependencies_used, |
| textlow_not_set); |
| includes_used = 0; |
| dependencies_used = 0; |
| } |
| first_fun_line_offset = 0; |
| |
| /* XCOFF, according to the AIX 3.2 documentation, puts the |
| filename in cs->c_name. But xlc 1.3.0.2 has decided to |
| do things the standard COFF way and put it in the auxent. |
| We use the auxent if the symbol is ".file" and an auxent |
| exists, otherwise use the symbol itself. */ |
| if (!strcmp (namestring, ".file") && symbol.n_numaux > 0) |
| { |
| filestring = coff_getfilename (&main_aux[0], objfile); |
| } |
| else |
| filestring = namestring; |
| |
| pst = xcoff_start_psymtab (partial_symtabs, objfile, |
| filestring, |
| symnum_before); |
| last_csect_name = NULL; |
| } |
| break; |
| |
| default: |
| { |
| complaint (_("Storage class %d not recognized during scan"), |
| sclass); |
| } |
| [[fallthrough]]; |
| |
| case C_FCN: |
| /* C_FCN is .bf and .ef symbols. I think it is sufficient |
| to handle only the C_FUN and C_EXT. */ |
| |
| case C_BSTAT: |
| case C_ESTAT: |
| case C_ARG: |
| case C_REGPARM: |
| case C_REG: |
| case C_TPDEF: |
| case C_STRTAG: |
| case C_UNTAG: |
| case C_ENTAG: |
| case C_LABEL: |
| case C_NULL: |
| |
| /* C_EINCL means we are switching back to the main file. But there |
| is no reason to care; the only thing we want to know about |
| includes is the names of all the included (.h) files. */ |
| case C_EINCL: |
| |
| case C_BLOCK: |
| |
| /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be |
| used instead. */ |
| case C_STAT: |
| |
| /* I don't think the name of the common block (as opposed to the |
| variables within it) is something which is user visible |
| currently. */ |
| case C_BCOMM: |
| case C_ECOMM: |
| |
| case C_PSYM: |
| case C_RPSYM: |
| |
| /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL |
| so C_LSYM would appear to be only for locals. */ |
| case C_LSYM: |
| |
| case C_AUTO: |
| case C_RSYM: |
| { |
| /* We probably could save a few instructions by assuming that |
| C_LSYM, C_PSYM, etc., never have auxents. */ |
| int naux1 = symbol.n_numaux + 1; |
| |
| ssymnum += naux1; |
| sraw_symbol += bfd_coff_symesz (abfd) * naux1; |
| } |
| break; |
| |
| case C_BINCL: |
| { |
| /* Mark down an include file in the current psymtab. */ |
| enum language tmp_language; |
| |
| swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| &ssymnum, objfile); |
| |
| tmp_language = deduce_language_from_filename (namestring); |
| |
| /* Only change the psymtab's language if we've learned |
| something useful (eg. tmp_language is not language_unknown). |
| In addition, to match what start_subfile does, never change |
| from C++ to C. */ |
| if (tmp_language != language_unknown |
| && (tmp_language != language_c |
| || psymtab_language != language_cplus)) |
| psymtab_language = tmp_language; |
| |
| /* In C++, one may expect the same filename to come round many |
| times, when code is coming alternately from the main file |
| and from inline functions in other files. So I check to see |
| if this is a file we've seen before -- either the main |
| source file, or a previously included file. |
| |
| This seems to be a lot of time to be spending on N_SOL, but |
| things like "break c-exp.y:435" need to work (I |
| suppose the psymtab_include_list could be hashed or put |
| in a binary tree, if profiling shows this is a major hog). */ |
| if (pst && strcmp (namestring, pst->filename) == 0) |
| continue; |
| |
| { |
| int i; |
| |
| for (i = 0; i < includes_used; i++) |
| if (strcmp (namestring, psymtab_include_list[i]) == 0) |
| { |
| i = -1; |
| break; |
| } |
| if (i == -1) |
| continue; |
| } |
| psymtab_include_list[includes_used++] = namestring; |
| if (includes_used >= includes_allocated) |
| { |
| const char **orig = psymtab_include_list; |
| |
| psymtab_include_list = (const char **) |
| alloca ((includes_allocated *= 2) * |
| sizeof (const char *)); |
| memcpy (psymtab_include_list, orig, |
| includes_used * sizeof (const char *)); |
| } |
| continue; |
| } |
| case C_FUN: |
| /* The value of the C_FUN is not the address of the function (it |
| appears to be the address before linking), but as long as it |
| is smaller than the actual address, then find_pc_partial_function |
| will use the minimal symbols instead. I hope. */ |
| |
| case C_GSYM: |
| case C_ECOML: |
| case C_DECL: |
| case C_STSYM: |
| { |
| const char *p; |
| |
| swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| &ssymnum, objfile); |
| |
| p = strchr (namestring, ':'); |
| if (!p) |
| continue; /* Not a debugging symbol. */ |
| |
| /* Main processing section for debugging symbols which |
| the initial read through the symbol tables needs to worry |
| about. If we reach this point, the symbol which we are |
| considering is definitely one we are interested in. |
| p must also contain the (valid) index into the namestring |
| which indicates the debugging type symbol. */ |
| |
| switch (p[1]) |
| { |
| case 'S': |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, VAR_DOMAIN, LOC_STATIC, |
| SECT_OFF_DATA (objfile), |
| psymbol_placement::STATIC, |
| unrelocated_addr (symbol.n_value), |
| psymtab_language, |
| partial_symtabs, objfile); |
| continue; |
| |
| case 'G': |
| /* The addresses in these entries are reported to be |
| wrong. See the code that reads 'G's for symtabs. */ |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, VAR_DOMAIN, LOC_STATIC, |
| SECT_OFF_DATA (objfile), |
| psymbol_placement::GLOBAL, |
| unrelocated_addr (symbol.n_value), |
| psymtab_language, |
| partial_symtabs, objfile); |
| continue; |
| |
| case 'T': |
| /* When a 'T' entry is defining an anonymous enum, it |
| may have a name which is the empty string, or a |
| single space. Since they're not really defining a |
| symbol, those shouldn't go in the partial symbol |
| table. We do pick up the elements of such enums at |
| 'check_enum:', below. */ |
| if (p >= namestring + 2 |
| || (p == namestring + 1 |
| && namestring[0] != ' ')) |
| { |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
| psymbol_placement::STATIC, |
| unrelocated_addr (0), |
| psymtab_language, |
| partial_symtabs, objfile); |
| if (p[2] == 't') |
| { |
| /* Also a typedef with the same name. */ |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, TYPE_DOMAIN, LOC_TYPEDEF, -1, |
| psymbol_placement::STATIC, |
| unrelocated_addr (0), |
| psymtab_language, |
| partial_symtabs, objfile); |
| p += 1; |
| } |
| } |
| goto check_enum; |
| |
| case 't': |
| if (p != namestring) /* a name is there, not just :T... */ |
| { |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, TYPE_DOMAIN, LOC_TYPEDEF, -1, |
| psymbol_placement::STATIC, |
| unrelocated_addr (0), |
| psymtab_language, |
| partial_symtabs, objfile); |
| } |
| check_enum: |
| /* If this is an enumerated type, we need to |
| add all the enum constants to the partial symbol |
| table. This does not cover enums without names, e.g. |
| "enum {a, b} c;" in C, but fortunately those are |
| rare. There is no way for GDB to find those from the |
| enum type without spending too much time on it. Thus |
| to solve this problem, the compiler needs to put out the |
| enum in a nameless type. GCC2 does this. */ |
| |
| /* We are looking for something of the form |
| <name> ":" ("t" | "T") [<number> "="] "e" |
| {<constant> ":" <value> ","} ";". */ |
| |
| /* Skip over the colon and the 't' or 'T'. */ |
| p += 2; |
| /* This type may be given a number. Also, numbers can come |
| in pairs like (0,26). Skip over it. */ |
| while ((*p >= '0' && *p <= '9') |
| || *p == '(' || *p == ',' || *p == ')' |
| || *p == '=') |
| p++; |
| |
| if (*p++ == 'e') |
| { |
| /* The aix4 compiler emits extra crud before the |
| members. */ |
| if (*p == '-') |
| { |
| /* Skip over the type (?). */ |
| while (*p != ':') |
| p++; |
| |
| /* Skip over the colon. */ |
| p++; |
| } |
| |
| /* We have found an enumerated type. */ |
| /* According to comments in read_enum_type |
| a comma could end it instead of a semicolon. |
| I don't know where that happens. |
| Accept either. */ |
| while (*p && *p != ';' && *p != ',') |
| { |
| const char *q; |
| |
| /* Check for and handle cretinous dbx symbol name |
| continuation! */ |
| if (*p == '\\' || (*p == '?' && p[1] == '\0')) |
| p = next_symbol_text (objfile); |
| |
| /* Point to the character after the name |
| of the enum constant. */ |
| for (q = p; *q && *q != ':'; q++) |
| ; |
| /* Note that the value doesn't matter for |
| enum constants in psymtabs, just in symtabs. */ |
| pst->add_psymbol (std::string_view (p, q - p), true, |
| VAR_DOMAIN, LOC_CONST, -1, |
| psymbol_placement::STATIC, |
| unrelocated_addr (0), |
| psymtab_language, |
| partial_symtabs, objfile); |
| /* Point past the name. */ |
| p = q; |
| /* Skip over the value. */ |
| while (*p && *p != ',') |
| p++; |
| /* Advance past the comma. */ |
| if (*p) |
| p++; |
| } |
| } |
| continue; |
| |
| case 'c': |
| /* Constant, e.g. from "const" in Pascal. */ |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, VAR_DOMAIN, LOC_CONST, -1, |
| psymbol_placement::STATIC, |
| unrelocated_addr (0), |
| psymtab_language, |
| partial_symtabs, objfile); |
| continue; |
| |
| case 'f': |
| if (! pst) |
| { |
| std::string name (namestring, (p - namestring)); |
| function_outside_compilation_unit_complaint (name.c_str ()); |
| } |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, FUNCTION_DOMAIN, LOC_BLOCK, |
| SECT_OFF_TEXT (objfile), |
| psymbol_placement::STATIC, |
| unrelocated_addr (symbol.n_value), |
| psymtab_language, |
| partial_symtabs, objfile); |
| continue; |
| |
| /* Global functions were ignored here, but now they |
| are put into the global psymtab like one would expect. |
| They're also in the minimal symbol table. */ |
| case 'F': |
| if (! pst) |
| { |
| std::string name (namestring, (p - namestring)); |
| function_outside_compilation_unit_complaint (name.c_str ()); |
| } |
| |
| /* We need only the minimal symbols for these |
| loader-generated definitions. Keeping the global |
| symbols leads to "in psymbols but not in symbols" |
| errors. */ |
| if (startswith (namestring, "@FIX")) |
| continue; |
| |
| pst->add_psymbol (std::string_view (namestring, |
| p - namestring), |
| true, FUNCTION_DOMAIN, LOC_BLOCK, |
| SECT_OFF_TEXT (objfile), |
| psymbol_placement::GLOBAL, |
| unrelocated_addr (symbol.n_value), |
| psymtab_language, |
| partial_symtabs, objfile); |
| continue; |
| |
| /* Two things show up here (hopefully); static symbols of |
| local scope (static used inside braces) or extensions |
| of structure symbols. We can ignore both. */ |
| case 'V': |
| case '(': |
| case '0': |
| case '1': |
| case '2': |
| case '3': |
| case '4': |
| case '5': |
| case '6': |
| case '7': |
| case '8': |
| case '9': |
| case '-': |
| case '#': /* For symbol identification (used in |
| live ranges). */ |
| continue; |
| |
| case ':': |
| /* It is a C++ nested symbol. We don't need to record it |
| (I don't think); if we try to look up foo::bar::baz, |
| then symbols for the symtab containing foo should get |
| read in, I think. */ |
| /* Someone says sun cc puts out symbols like |
| /foo/baz/maclib::/usr/local/bin/maclib, |
| which would get here with a symbol type of ':'. */ |
| continue; |
| |
| default: |
| /* Unexpected symbol descriptor. The second and |
| subsequent stabs of a continued stab can show up |
| here. The question is whether they ever can mimic |
| a normal stab--it would be nice if not, since we |
| certainly don't want to spend the time searching to |
| the end of every string looking for a |
| backslash. */ |
| |
| complaint (_("unknown symbol descriptor `%c'"), p[1]); |
| |
| /* Ignore it; perhaps it is an extension that we don't |
| know about. */ |
| continue; |
| } |
| } |
| } |
| } |
| |
| if (pst) |
| { |
| xcoff_end_psymtab (objfile, partial_symtabs, |
| pst, psymtab_include_list, includes_used, |
| ssymnum, dependency_list, |
| dependencies_used, textlow_not_set); |
| } |
| |
| /* Record the toc offset value of this symbol table into objfile |
| structure. If no XMC_TC0 is found, toc_offset should be zero. |
| Another place to obtain this information would be file auxiliary |
| header. */ |
| |
| XCOFF_DATA (objfile)->toc_offset = toc_offset; |
| } |
| |
| /* Return the toc offset value for a given objfile. */ |
| |
| CORE_ADDR |
| xcoff_get_toc_offset (struct objfile *objfile) |
| { |
| if (objfile) |
| return XCOFF_DATA (objfile)->toc_offset; |
| return 0; |
| } |
| |
| /* Scan and build partial symbols for a symbol file. |
| We have been initialized by a call to dbx_symfile_init, which |
| put all the relevant info into a "struct dbx_symfile_info", |
| hung off the objfile structure. |
| |
| SECTION_OFFSETS contains offsets relative to which the symbols in the |
| various sections are (depending where the sections were actually |
| loaded). */ |
| |
| static void |
| xcoff_initial_scan (struct objfile *objfile, symfile_add_flags symfile_flags) |
| { |
| bfd *abfd; |
| int val; |
| int num_symbols; /* # of symbols */ |
| file_ptr symtab_offset; /* symbol table and */ |
| file_ptr stringtab_offset; /* string table file offsets */ |
| struct xcoff_symfile_info *info; |
| const char *name; |
| unsigned int size; |
| |
| info = XCOFF_DATA (objfile); |
| symfile_bfd = abfd = objfile->obfd.get (); |
| name = objfile_name (objfile); |
| |
| num_symbols = bfd_get_symcount (abfd); /* # of symbols */ |
| symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */ |
| stringtab_offset = symtab_offset + |
| num_symbols * coff_data (abfd)->local_symesz; |
| |
| info->min_lineno_offset = 0; |
| info->max_lineno_offset = 0; |
| bfd_map_over_sections (abfd, find_linenos, info); |
| |
| if (num_symbols > 0) |
| { |
| /* Read the string table. */ |
| init_stringtab (abfd, stringtab_offset, objfile); |
| |
| /* Read the .debug section, if present and if we're not ignoring |
| it. */ |
| if (!(objfile->flags & OBJF_READNEVER)) |
| { |
| struct bfd_section *secp; |
| bfd_size_type length; |
| bfd_byte *debugsec = NULL; |
| |
| secp = bfd_get_section_by_name (abfd, ".debug"); |
| if (secp) |
| { |
| length = bfd_section_size (secp); |
| if (length) |
| { |
| debugsec |
| = (bfd_byte *) obstack_alloc (&objfile->objfile_obstack, |
| length); |
| |
| if (!bfd_get_full_section_contents (abfd, secp, &debugsec)) |
| { |
| error (_("Error reading .debug section of `%s': %s"), |
| name, bfd_errmsg (bfd_get_error ())); |
| } |
| } |
| } |
| info->debugsec = (char *) debugsec; |
| } |
| } |
| |
| /* Read the symbols. We keep them in core because we will want to |
| access them randomly in read_symbol*. */ |
| val = bfd_seek (abfd, symtab_offset, SEEK_SET); |
| if (val < 0) |
| error (_("Error reading symbols from %s: %s"), |
| name, bfd_errmsg (bfd_get_error ())); |
| size = coff_data (abfd)->local_symesz * num_symbols; |
| info->symtbl = (char *) obstack_alloc (&objfile->objfile_obstack, size); |
| info->symtbl_num_syms = num_symbols; |
| |
| val = bfd_read (info->symtbl, size, abfd); |
| if (val != size) |
| perror_with_name (_("reading symbol table")); |
| |
| scoped_free_pendings free_pending; |
| minimal_symbol_reader reader (objfile); |
| |
| /* Now that the symbol table data of the executable file are all in core, |
| process them and define symbols accordingly. */ |
| |
| psymbol_functions *psf = new psymbol_functions (); |
| psymtab_storage *partial_symtabs = psf->get_partial_symtabs ().get (); |
| objfile->qf.emplace_front (psf); |
| scan_xcoff_symtab (reader, partial_symtabs, objfile); |
| |
| /* Install any minimal symbols that have been collected as the current |
| minimal symbols for this objfile. */ |
| |
| reader.install (); |
| |
| /* DWARF2 sections. */ |
| |
| dwarf2_initialize_objfile (objfile, &dwarf2_xcoff_names); |
| } |
| |
| static void |
| xcoff_symfile_offsets (struct objfile *objfile, |
| const section_addr_info &addrs) |
| { |
| const char *first_section_name; |
| |
| default_symfile_offsets (objfile, addrs); |
| |
| /* Oneof the weird side-effects of default_symfile_offsets is that |
| it sometimes sets some section indices to zero for sections that, |
| in fact do not exist. See the body of default_symfile_offsets |
| for more info on when that happens. Undo that, as this then allows |
| us to test whether the associated section exists or not, and then |
| access it quickly (without searching it again). */ |
| |
| if (objfile->section_offsets.empty ()) |
| return; /* Is that even possible? Better safe than sorry. */ |
| |
| first_section_name |
| = bfd_section_name (objfile->sections_start[0].the_bfd_section); |
| |
| if (objfile->sect_index_text == 0 |
| && strcmp (first_section_name, ".text") != 0) |
| objfile->sect_index_text = -1; |
| |
| if (objfile->sect_index_data == 0 |
| && strcmp (first_section_name, ".data") != 0) |
| objfile->sect_index_data = -1; |
| |
| if (objfile->sect_index_bss == 0 |
| && strcmp (first_section_name, ".bss") != 0) |
| objfile->sect_index_bss = -1; |
| |
| if (objfile->sect_index_rodata == 0 |
| && strcmp (first_section_name, ".rodata") != 0) |
| objfile->sect_index_rodata = -1; |
| } |
| |
| /* Register our ability to parse symbols for xcoff BFD files. */ |
| |
| static const struct sym_fns xcoff_sym_fns = |
| { |
| |
| /* It is possible that coff and xcoff should be merged as |
| they do have fundamental similarities (for example, the extra storage |
| classes used for stabs could presumably be recognized in any COFF file). |
| However, in addition to obvious things like all the csect hair, there are |
| some subtler differences between xcoffread.c and coffread.c, notably |
| the fact that coffread.c has no need to read in all the symbols, but |
| xcoffread.c reads all the symbols and does in fact randomly access them |
| (in C_BSTAT and line number processing). */ |
| |
| xcoff_new_init, /* init anything gbl to entire symtab */ |
| xcoff_symfile_init, /* read initial info, setup for sym_read() */ |
| xcoff_initial_scan, /* read a symbol file into symtab */ |
| xcoff_symfile_finish, /* finished with file, cleanup */ |
| xcoff_symfile_offsets, /* xlate offsets ext->int form */ |
| default_symfile_segments, /* Get segment information from a file. */ |
| aix_process_linenos, |
| default_symfile_relocate, /* Relocate a debug section. */ |
| NULL, /* sym_probe_fns */ |
| }; |
| |
| /* Same as xcoff_get_n_import_files, but for core files. */ |
| |
| static int |
| xcoff_get_core_n_import_files (bfd *abfd) |
| { |
| asection *sect = bfd_get_section_by_name (abfd, ".ldinfo"); |
| gdb_byte buf[4]; |
| file_ptr offset = 0; |
| int n_entries = 0; |
| |
| if (sect == NULL) |
| return -1; /* Not a core file. */ |
| |
| for (offset = 0; offset < bfd_section_size (sect);) |
| { |
| int next; |
| |
| n_entries++; |
| |
| if (!bfd_get_section_contents (abfd, sect, buf, offset, 4)) |
| return -1; |
| next = bfd_get_32 (abfd, buf); |
| if (next == 0) |
| break; /* This is the last entry. */ |
| offset += next; |
| } |
| |
| /* Return the number of entries, excluding the first one, which is |
| the path to the executable that produced this core file. */ |
| return n_entries - 1; |
| } |
| |
| /* Return the number of import files (shared libraries) that the given |
| BFD depends on. Return -1 if this number could not be computed. */ |
| |
| int |
| xcoff_get_n_import_files (bfd *abfd) |
| { |
| asection *sect = bfd_get_section_by_name (abfd, ".loader"); |
| gdb_byte buf[4]; |
| int l_nimpid; |
| |
| /* If the ".loader" section does not exist, the objfile is probably |
| not an executable. Might be a core file... */ |
| if (sect == NULL) |
| return xcoff_get_core_n_import_files (abfd); |
| |
| /* The number of entries in the Import Files Table is stored in |
| field l_nimpid. This field is always at offset 16, and is |
| always 4 bytes long. Read those 4 bytes. */ |
| |
| if (!bfd_get_section_contents (abfd, sect, buf, 16, 4)) |
| return -1; |
| l_nimpid = bfd_get_32 (abfd, buf); |
| |
| /* By convention, the first entry is the default LIBPATH value |
| to be used by the system loader, so it does not count towards |
| the number of import files. */ |
| return l_nimpid - 1; |
| } |
| |
| void _initialize_xcoffread (); |
| void |
| _initialize_xcoffread () |
| { |
| add_symtab_fns (bfd_target_xcoff_flavour, &xcoff_sym_fns); |
| } |