| /* Read AIX xcoff symbol tables and convert to internal format, for GDB. |
| Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 1997 |
| 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 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "bfd.h" |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <ctype.h> |
| #include "gdb_string.h" |
| |
| #include <sys/param.h> |
| #ifndef NO_SYS_FILE |
| #include <sys/file.h> |
| #endif |
| #include "gdb_stat.h" |
| |
| #include "coff/internal.h" |
| #include "libcoff.h" /* FIXME, internal data from BFD */ |
| #include "coff/rs6000.h" |
| |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "stabsread.h" |
| #include "expression.h" |
| #include "language.h" /* Needed inside partial-stab.h */ |
| #include "complaints.h" |
| |
| #include "gdb-stabs.h" |
| |
| /* For interface with stabsread.c. */ |
| #include "aout/stab_gnu.h" |
| |
| /* For interface with partial-stab.h. */ |
| #define N_UNDF 0 /* Undefined symbol */ |
| #undef N_ABS |
| #define N_ABS 2 |
| #define N_TEXT 4 /* Text sym -- defined at offset in text seg */ |
| #define N_DATA 6 /* Data sym -- defined at offset in data seg */ |
| #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */ |
| #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */ |
| #define N_FN 0x1f /* File name of .o file */ |
| #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */ |
| /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT, |
| N_DATA, or N_BSS. When the low-order bit of other types is set, |
| (e.g. N_WARNING versus N_FN), they are two different types. */ |
| #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */ |
| #define N_INDR 0x0a |
| |
| /* The following symbols refer to set elements. |
| All the N_SET[ATDB] symbols with the same name form one set. |
| Space is allocated for the set in the text section, and each set |
| elements value is stored into one word of the space. |
| The first word of the space is the length of the set (number of elements). |
| |
| The address of the set is made into an N_SETV symbol |
| whose name is the same as the name of the set. |
| This symbol acts like a N_DATA global symbol |
| in that it can satisfy undefined external references. */ |
| |
| /* These appear as input to LD, in a .o file. */ |
| #define N_SETA 0x14 /* Absolute set element symbol */ |
| #define N_SETT 0x16 /* Text set element symbol */ |
| #define N_SETD 0x18 /* Data set element symbol */ |
| #define N_SETB 0x1A /* Bss set element symbol */ |
| |
| /* This is output from LD. */ |
| #define N_SETV 0x1C /* Pointer to set vector in data area. */ |
| |
| /* We put a pointer to this structure in the read_symtab_private field |
| of the psymtab. */ |
| |
| struct 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 coff_symbol |
| { |
| char *c_name; |
| int c_symnum; /* symbol number of this entry */ |
| int c_naux; /* 0 if syment only, 1 if syment + auxent */ |
| long c_value; |
| unsigned char c_sclass; |
| int c_secnum; |
| unsigned int c_type; |
| }; |
| |
| /* last function's saved coff symbol `cs' */ |
| |
| static struct coff_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 |
| |
| /* Nonzero if within a function (so symbols should be local, |
| if nothing says specifically). */ |
| |
| int within_function; |
| |
| /* 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 coff_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; |
| |
| /* Pointer to debug section. */ |
| char *debugsec; |
| |
| /* Pointer to the a.out symbol table. */ |
| char *symtbl; |
| |
| /* Number of symbols in symtbl. */ |
| int symtbl_num_syms; |
| |
| /* Offset in data section to TOC anchor. */ |
| CORE_ADDR toc_offset; |
| }; |
| |
| static struct complaint storclass_complaint = |
| {"Unexpected storage class: %d", 0, 0}; |
| |
| static struct complaint bf_notfound_complaint = |
| {"line numbers off, `.bf' symbol not found", 0, 0}; |
| |
| static struct complaint ef_complaint = |
| {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0}; |
| |
| static struct complaint eb_complaint = |
| {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0}; |
| |
| static void |
| xcoff_initial_scan PARAMS ((struct objfile *, int)); |
| |
| static void |
| scan_xcoff_symtab PARAMS ((struct objfile *)); |
| |
| static char * |
| xcoff_next_symbol_text PARAMS ((struct objfile *)); |
| |
| static void |
| record_include_begin PARAMS ((struct coff_symbol *)); |
| |
| static void |
| enter_line_range PARAMS ((struct subfile *, unsigned, unsigned, |
| CORE_ADDR, CORE_ADDR, unsigned *)); |
| |
| static void |
| init_stringtab PARAMS ((bfd *, file_ptr, struct objfile *)); |
| |
| static void |
| xcoff_symfile_init PARAMS ((struct objfile *)); |
| |
| static void |
| xcoff_new_init PARAMS ((struct objfile *)); |
| |
| static void |
| xcoff_symfile_finish PARAMS ((struct objfile *)); |
| |
| static void |
| xcoff_symfile_offsets PARAMS ((struct objfile *, struct section_addr_info *addrs)); |
| |
| static void |
| find_linenos PARAMS ((bfd *, sec_ptr, PTR)); |
| |
| static char * |
| coff_getfilename PARAMS ((union internal_auxent *, struct objfile *)); |
| |
| static void |
| read_symbol PARAMS ((struct internal_syment *, int)); |
| |
| static int |
| read_symbol_lineno PARAMS ((int)); |
| |
| static int |
| read_symbol_nvalue PARAMS ((int)); |
| |
| static struct symbol * |
| process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *)); |
| |
| static void |
| read_xcoff_symtab PARAMS ((struct partial_symtab *)); |
| |
| #if 0 |
| static void |
| add_stab_to_list PARAMS ((char *, struct pending_stabs **)); |
| #endif |
| |
| static int |
| compare_lte PARAMS ((const void *, const void *)); |
| |
| static struct linetable * |
| arrange_linetable PARAMS ((struct linetable *)); |
| |
| static void |
| record_include_end PARAMS ((struct coff_symbol *)); |
| |
| static void |
| process_linenos PARAMS ((CORE_ADDR, CORE_ADDR)); |
| |
| |
| /* Translate from a COFF section number (target_index) to a SECT_OFF_* |
| code. */ |
| static int secnum_to_section PARAMS ((int, struct objfile *)); |
| static asection *secnum_to_bfd_section PARAMS ((int, struct objfile *)); |
| |
| struct find_targ_sec_arg |
| { |
| int targ_index; |
| int *resultp; |
| asection **bfd_sect; |
| }; |
| |
| static void find_targ_sec PARAMS ((bfd *, asection *, void *)); |
| |
| static void |
| find_targ_sec (abfd, sect, obj) |
| bfd *abfd; |
| asection *sect; |
| PTR obj; |
| { |
| struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj; |
| if (sect->target_index == args->targ_index) |
| { |
| /* This is the section. Figure out what SECT_OFF_* code it is. */ |
| if (bfd_get_section_flags (abfd, sect) & SEC_CODE) |
| *args->resultp = SECT_OFF_TEXT; |
| else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD) |
| *args->resultp = SECT_OFF_DATA; |
| else |
| *args->resultp = SECT_OFF_BSS; |
| *args->bfd_sect = sect; |
| } |
| } |
| |
| /* Return the section number (SECT_OFF_*) that CS points to. */ |
| static int |
| secnum_to_section (secnum, objfile) |
| int secnum; |
| struct objfile *objfile; |
| { |
| int off = SECT_OFF_TEXT; |
| asection *sect = NULL; |
| struct find_targ_sec_arg args; |
| args.targ_index = secnum; |
| args.resultp = &off; |
| args.bfd_sect = § |
| bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| return off; |
| } |
| |
| /* Return the BFD section that CS points to. */ |
| static asection * |
| secnum_to_bfd_section (secnum, objfile) |
| int secnum; |
| struct objfile *objfile; |
| { |
| int off = SECT_OFF_TEXT; |
| asection *sect = NULL; |
| struct find_targ_sec_arg args; |
| args.targ_index = secnum; |
| args.resultp = &off; |
| args.bfd_sect = § |
| bfd_map_over_sections (objfile->obfd, find_targ_sec, &args); |
| return sect; |
| } |
| |
| /* add a given stab string into given stab vector. */ |
| |
| #if 0 |
| |
| static void |
| add_stab_to_list (stabname, stabvector) |
| 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 |
| /* *INDENT-OFF* */ |
| /* 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. */ |
| /* *INDENT-ON* */ |
| |
| |
| |
| /* compare line table entry addresses. */ |
| |
| static int |
| compare_lte (lte1p, lte2p) |
| const void *lte1p; |
| const void *lte2p; |
| { |
| struct linetable_entry *lte1 = (struct linetable_entry *) lte1p; |
| struct linetable_entry *lte2 = (struct linetable_entry *) lte2p; |
| return lte1->pc - lte2->pc; |
| } |
| |
| /* 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. If the old one is good enough, return the old one. */ |
| /* FIXME: I think all this stuff can be replaced by just passing |
| sort_linevec = 1 to end_symtab. */ |
| |
| static struct linetable * |
| arrange_linetable (oldLineTb) |
| struct linetable *oldLineTb; /* old linetable */ |
| { |
| int ii, jj, newline, /* new line count */ |
| function_count; /* # of functions */ |
| |
| struct linetable_entry *fentry; /* function entry vector */ |
| int fentry_size; /* # of function entries */ |
| struct linetable *newLineTb; /* new line table */ |
| |
| #define NUM_OF_FUNCTIONS 20 |
| |
| fentry_size = NUM_OF_FUNCTIONS; |
| fentry = (struct linetable_entry *) |
| xmalloc (fentry_size * sizeof (struct linetable_entry)); |
| |
| for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii) |
| { |
| |
| if (oldLineTb->item[ii].line == 0) |
| { /* function entry found. */ |
| |
| if (function_count >= fentry_size) |
| { /* make sure you have room. */ |
| fentry_size *= 2; |
| fentry = (struct linetable_entry *) |
| xrealloc (fentry, fentry_size * sizeof (struct linetable_entry)); |
| } |
| fentry[function_count].line = ii; |
| fentry[function_count].pc = oldLineTb->item[ii].pc; |
| ++function_count; |
| } |
| } |
| |
| if (function_count == 0) |
| { |
| free (fentry); |
| return oldLineTb; |
| } |
| else if (function_count > 1) |
| qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte); |
| |
| /* allocate a new line table. */ |
| newLineTb = (struct linetable *) |
| xmalloc |
| (sizeof (struct linetable) + |
| (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry)); |
| |
| /* if line table does not start with a function beginning, copy up until |
| a function begin. */ |
| |
| newline = 0; |
| if (oldLineTb->item[0].line != 0) |
| for (newline = 0; |
| newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline) |
| newLineTb->item[newline] = oldLineTb->item[newline]; |
| |
| /* Now copy function lines one by one. */ |
| |
| for (ii = 0; ii < function_count; ++ii) |
| { |
| for (jj = fentry[ii].line + 1; |
| jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0; |
| ++jj, ++newline) |
| newLineTb->item[newline] = oldLineTb->item[jj]; |
| } |
| free (fentry); |
| newLineTb->nitems = oldLineTb->nitems - function_count; |
| return newLineTb; |
| } |
| |
| /* include file support: C_BINCL/C_EINCL pairs will be kept in the |
| following `IncludeChain'. At the end of each symtab (end_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 */ |
| |
| static void allocate_include_entry PARAMS ((void)); |
| |
| static void |
| record_include_begin (cs) |
| struct coff_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. */ |
| static struct complaint msg = |
| {"Nested C_BINCL symbols", 0, 0}; |
| complain (&msg); |
| } |
| ++inclDepth; |
| |
| allocate_include_entry (); |
| |
| inclTable[inclIndx].name = cs->c_name; |
| inclTable[inclIndx].begin = cs->c_value; |
| } |
| |
| static void |
| record_include_end (cs) |
| struct coff_symbol *cs; |
| { |
| InclTable *pTbl; |
| |
| if (inclDepth == 0) |
| { |
| static struct complaint msg = |
| {"Mismatched C_BINCL/C_EINCL pair", 0, 0}; |
| complain (&msg); |
| } |
| |
| allocate_include_entry (); |
| |
| pTbl = &inclTable[inclIndx]; |
| pTbl->end = cs->c_value; |
| |
| --inclDepth; |
| ++inclIndx; |
| } |
| |
| static void |
| allocate_include_entry () |
| { |
| if (inclTable == NULL) |
| { |
| inclTable = (InclTable *) |
| xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| memset (inclTable, |
| '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH); |
| inclLength = INITIAL_INCLUDE_TABLE_LENGTH; |
| inclIndx = 0; |
| } |
| else if (inclIndx >= inclLength) |
| { |
| inclLength += INITIAL_INCLUDE_TABLE_LENGTH; |
| inclTable = (InclTable *) |
| xrealloc (inclTable, sizeof (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 struct partial_symtab *this_symtab_psymtab; |
| |
| /* 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 (start, end) |
| CORE_ADDR start, end; |
| { |
| int offset, ii; |
| file_ptr max_offset = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->max_lineno_offset; |
| |
| /* subfile structure for the main compilation unit. */ |
| struct subfile main_subfile; |
| |
| /* 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 symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off; |
| if (offset == 0) |
| goto return_after_cleanup; |
| |
| memset (&main_subfile, '\0', sizeof (main_subfile)); |
| |
| 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. */ |
| main_source_baseline = 0; |
| for (ii = 0; ii < inclIndx; ++ii) |
| { |
| struct subfile *tmpSubfile; |
| |
| /* 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); |
| } |
| |
| /* Have a new subfile for the include file. */ |
| |
| tmpSubfile = inclTable[ii].subfile = |
| (struct subfile *) xmalloc (sizeof (struct subfile)); |
| |
| memset (tmpSubfile, '\0', sizeof (struct subfile)); |
| firstLine = &(inclTable[ii].funStartLine); |
| |
| /* Enter include file's lines now. */ |
| enter_line_range (tmpSubfile, 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) |
| { |
| struct linetable *lineTb, *lv; |
| |
| lv = main_subfile.line_vector; |
| |
| /* Line numbers are not necessarily ordered. xlc compilation will |
| put static function to the end. */ |
| |
| lineTb = arrange_linetable (lv); |
| if (lv == lineTb) |
| { |
| current_subfile->line_vector = (struct linetable *) |
| xrealloc (lv, (sizeof (struct linetable) |
| + lv->nitems * sizeof (struct linetable_entry))); |
| } |
| else |
| { |
| free (lv); |
| current_subfile->line_vector = lineTb; |
| } |
| |
| current_subfile->line_vector_length = |
| current_subfile->line_vector->nitems; |
| } |
| |
| /* Now, process included files' line numbers. */ |
| |
| for (ii = 0; ii < inclIndx; ++ii) |
| { |
| if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */ |
| { |
| struct linetable *lineTb, *lv; |
| |
| lv = (inclTable[ii].subfile)->line_vector; |
| |
| /* Line numbers are not necessarily ordered. xlc compilation will |
| put static function to the end. */ |
| |
| lineTb = arrange_linetable (lv); |
| |
| 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, (char *) 0); |
| #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. */ |
| char *fakename = strrchr (inclTable[ii].name, '.'); |
| if (fakename == NULL) |
| fakename = " ?"; |
| start_subfile (fakename, (char *) 0); |
| free (current_subfile->name); |
| } |
| current_subfile->name = xstrdup (inclTable[ii].name); |
| #endif |
| |
| if (lv == lineTb) |
| { |
| current_subfile->line_vector = |
| (struct linetable *) xrealloc |
| (lv, (sizeof (struct linetable) |
| + lv->nitems * sizeof (struct linetable_entry))); |
| |
| } |
| else |
| { |
| free (lv); |
| current_subfile->line_vector = lineTb; |
| } |
| |
| current_subfile->line_vector_length = |
| current_subfile->line_vector->nitems; |
| start_subfile (pop_subfile (), (char *) 0); |
| } |
| } |
| |
| return_after_cleanup: |
| |
| /* We don't want to keep alloc/free'ing the global include file table. */ |
| inclIndx = 0; |
| |
| /* Start with a fresh subfile structure for the next file. */ |
| memset (&main_subfile, '\0', sizeof (struct subfile)); |
| } |
| |
| void |
| aix_process_linenos () |
| { |
| /* process line numbers and enter them into line vector */ |
| process_linenos (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 (subfile, beginoffset, endoffset, startaddr, endaddr, |
| firstLine) |
| struct subfile *subfile; |
| unsigned beginoffset, endoffset; /* offsets to line table */ |
| CORE_ADDR startaddr, endaddr; |
| unsigned *firstLine; |
| { |
| unsigned int curoffset; |
| CORE_ADDR addr; |
| struct external_lineno ext_lnno; |
| struct internal_lineno int_lnno; |
| unsigned int limit_offset; |
| bfd *abfd; |
| |
| if (endoffset == 0 && startaddr == 0 && endaddr == 0) |
| return; |
| curoffset = beginoffset; |
| limit_offset = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->max_lineno_offset; |
| |
| if (endoffset != 0) |
| { |
| if (endoffset >= limit_offset) |
| { |
| static struct complaint msg = |
| {"Bad line table offset in C_EINCL directive", 0, 0}; |
| complain (&msg); |
| return; |
| } |
| limit_offset = endoffset; |
| } |
| else |
| limit_offset -= 1; |
| abfd = this_symtab_psymtab->objfile->obfd; |
| |
| while (curoffset <= limit_offset) |
| { |
| bfd_seek (abfd, curoffset, SEEK_SET); |
| bfd_read (&ext_lnno, sizeof (struct external_lineno), 1, abfd); |
| 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 += ANOFFSET (this_symtab_psymtab->objfile->section_offsets, |
| SECT_OFF_TEXT); |
| |
| if (addr < startaddr || (endaddr && addr >= endaddr)) |
| return; |
| |
| if (int_lnno.l_lnno == 0) |
| { |
| *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx); |
| record_line (subfile, 0, addr); |
| --(*firstLine); |
| } |
| else |
| record_line (subfile, *firstLine + int_lnno.l_lnno, 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) { \ |
| last_source_file = savestring (name, strlen (name)); \ |
| 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. */ |
| |
| /* Reading symbol table has to be fast! Keep the followings as macros, rather |
| than functions. */ |
| |
| #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \ |
| { \ |
| char *namestr; \ |
| namestr = (NAME); \ |
| if (namestr[0] == '.') ++namestr; \ |
| prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \ |
| (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \ |
| misc_func_recorded = 1; \ |
| } |
| |
| |
| /* 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 char * |
| xcoff_next_symbol_text (objfile) |
| struct objfile *objfile; |
| { |
| struct internal_syment symbol; |
| static struct complaint msg = |
| {"Unexpected symbol continuation", 0, 0}; |
| char *retval; |
| /* FIXME: is this the same as the passed arg? */ |
| objfile = this_symtab_psymtab->objfile; |
| |
| bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol); |
| if (symbol.n_zeroes) |
| { |
| complain (&msg); |
| |
| /* Return something which points to '\0' and hope the symbol reading |
| code does something reasonable. */ |
| retval = ""; |
| } |
| else if (symbol.n_sclass & 0x80) |
| { |
| retval = |
| ((struct coff_symfile_info *) objfile->sym_private)->debugsec |
| + symbol.n_offset; |
| raw_symbol += |
| coff_data (objfile->obfd)->local_symesz; |
| ++symnum; |
| } |
| else |
| { |
| complain (&msg); |
| |
| /* 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 (pst) |
| struct partial_symtab *pst; |
| { |
| struct objfile *objfile = pst->objfile; |
| bfd *abfd = objfile->obfd; |
| char *raw_auxptr; /* Pointer to first raw aux entry for sym */ |
| char *strtbl = ((struct coff_symfile_info *) objfile->sym_private)->strtbl; |
| char *debugsec = |
| ((struct coff_symfile_info *) objfile->sym_private)->debugsec; |
| |
| struct internal_syment symbol[1]; |
| union internal_auxent main_aux; |
| struct coff_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; |
| int fcn_start_addr = 0; |
| |
| struct coff_symbol fcn_stab_saved; |
| |
| /* fcn_cs_saved is global because process_xcoff_symbol needs it. */ |
| union internal_auxent fcn_aux_saved; |
| struct context_stack *new; |
| |
| char *filestring = " _start_ "; /* Name of the current file. */ |
| |
| char *last_csect_name; /* last seen csect's name and value */ |
| CORE_ADDR last_csect_val; |
| int last_csect_sec; |
| |
| this_symtab_psymtab = pst; |
| |
| /* Get the appropriate COFF "constants" related to the file we're |
| handling. */ |
| local_symesz = coff_data (abfd)->local_symesz; |
| |
| last_source_file = NULL; |
| last_csect_name = 0; |
| last_csect_val = 0; |
| |
| start_stabs (); |
| start_symtab (filestring, (char *) NULL, file_start_addr); |
| record_debugformat ("XCOFF"); |
| symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| max_symnum = |
| symnum + ((struct symloc *) pst->read_symtab_private)->numsyms; |
| first_object_file_end = 0; |
| |
| raw_symbol = |
| ((struct coff_symfile_info *) objfile->sym_private)->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 = obstack_alloc (&objfile->symbol_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 += coff_data (abfd)->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 (last_source_file) |
| { |
| pst->symtab = |
| end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT); |
| end_stabs (); |
| } |
| |
| start_stabs (); |
| start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0); |
| record_debugformat ("XCOFF"); |
| cur_src_end_addr = first_object_file_end; |
| /* done with all files, everything from here on is globals */ |
| } |
| |
| /* if explicitly specified as a function, treat is as one. */ |
| if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF) |
| { |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &main_aux); |
| goto function_entry_point; |
| } |
| |
| if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) |
| && cs->c_naux == 1) |
| { |
| /* Dealing with a symbol with a csect entry. */ |
| |
| #define CSECT(PP) ((PP)->x_csect) |
| #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l) |
| #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. */ |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, 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_symtab (file_end_addr, objfile, SECT_OFF_TEXT); |
| end_stabs (); |
| start_stabs (); |
| /* Give all csects for this source file the same |
| name. */ |
| start_symtab (filestring, NULL, (CORE_ADDR) 0); |
| record_debugformat ("XCOFF"); |
| } |
| |
| /* 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 + ANOFFSET (objfile->section_offsets, |
| SECT_OFF_TEXT); |
| file_end_addr = file_start_addr + CSECT_LEN (&main_aux); |
| |
| if (cs->c_name && cs->c_name[0] == '.') |
| { |
| last_csect_name = cs->c_name; |
| last_csect_val = cs->c_value; |
| last_csect_sec = secnum_to_section (cs->c_secnum, objfile); |
| } |
| } |
| 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)) |
| { |
| case XMC_PR: |
| /* a function entry point. */ |
| 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; |
| fcn_aux_saved = main_aux; |
| 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_symtab (file_end_addr, objfile, SECT_OFF_TEXT); |
| 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_symtab (filestring, (char *) NULL, (CORE_ADDR) 0); |
| record_debugformat ("XCOFF"); |
| 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 (STREQ (cs->c_name, ".bf")) |
| { |
| CORE_ADDR off = ANOFFSET (objfile->section_offsets, |
| SECT_OFF_TEXT); |
| bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass, |
| 0, cs->c_naux, &main_aux); |
| |
| within_function = 1; |
| |
| new = push_context (0, fcn_start_addr + off); |
| |
| new->name = define_symbol |
| (fcn_cs_saved.c_value + off, |
| fcn_stab_saved.c_name, 0, 0, objfile); |
| if (new->name != NULL) |
| SYMBOL_SECTION (new->name) = SECT_OFF_TEXT; |
| } |
| else if (STREQ (cs->c_name, ".ef")) |
| { |
| |
| 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 (context_stack_depth <= 0) |
| { /* We attempted to pop an empty context stack */ |
| complain (&ef_complaint, cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| new = pop_context (); |
| /* Stack must be empty now. */ |
| if (context_stack_depth > 0 || new == NULL) |
| { |
| complain (&ef_complaint, cs->c_symnum); |
| within_function = 0; |
| break; |
| } |
| |
| finish_block (new->name, &local_symbols, new->old_blocks, |
| new->start_addr, |
| (fcn_cs_saved.c_value |
| + fcn_aux_saved.x_sym.x_misc.x_fsize |
| + ANOFFSET (objfile->section_offsets, |
| SECT_OFF_TEXT)), |
| objfile); |
| within_function = 0; |
| } |
| break; |
| |
| case C_BSTAT: |
| /* Begin static block. */ |
| { |
| struct internal_syment symbol; |
| |
| read_symbol (&symbol, cs->c_value); |
| static_block_base = symbol.n_value; |
| static_block_section = |
| secnum_to_section (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: |
| { |
| static struct complaint msg = |
| {"Unrecognized storage class %d.", 0, 0}; |
| complain (&msg, 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 (STREQ (cs->c_name, ".bb")) |
| { |
| depth++; |
| new = push_context (depth, |
| (cs->c_value |
| + ANOFFSET (objfile->section_offsets, |
| SECT_OFF_TEXT))); |
| } |
| else if (STREQ (cs->c_name, ".eb")) |
| { |
| if (context_stack_depth <= 0) |
| { /* We attempted to pop an empty context stack */ |
| complain (&eb_complaint, cs->c_symnum); |
| break; |
| } |
| new = pop_context (); |
| if (depth-- != new->depth) |
| { |
| complain (&eb_complaint, cs->c_symnum); |
| break; |
| } |
| if (local_symbols && context_stack_depth > 0) |
| { |
| /* Make a block for the local symbols within. */ |
| finish_block (new->name, &local_symbols, new->old_blocks, |
| new->start_addr, |
| (cs->c_value |
| + ANOFFSET (objfile->section_offsets, |
| SECT_OFF_TEXT)), |
| objfile); |
| } |
| local_symbols = new->locals; |
| } |
| break; |
| |
| default: |
| process_xcoff_symbol (cs, objfile); |
| break; |
| } |
| } |
| |
| if (last_source_file) |
| { |
| struct symtab *s; |
| |
| complete_symtab (filestring, file_start_addr); |
| cur_src_end_addr = file_end_addr; |
| s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT); |
| /* When reading symbols for the last C_FILE of the objfile, try |
| to make sure that we set pst->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->symtab == NULL) |
| pst->symtab = s; |
| end_stabs (); |
| } |
| } |
| |
| #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \ |
| (SYMBOL2) = (struct symbol *) \ |
| obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \ |
| *(SYMBOL2) = *(SYMBOL1); |
| |
| |
| #define SYMNAME_ALLOC(NAME, ALLOCED) \ |
| (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack); |
| |
| |
| static struct type *func_symbol_type; |
| static struct type *var_symbol_type; |
| |
| /* process one xcoff symbol. */ |
| |
| static struct symbol * |
| process_xcoff_symbol (cs, objfile) |
| register struct coff_symbol *cs; |
| struct objfile *objfile; |
| { |
| struct symbol onesymbol; |
| register 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 = ANOFFSET (objfile->section_offsets, sec); |
| } |
| |
| name = cs->c_name; |
| if (name[0] == '.') |
| ++name; |
| |
| memset (sym, '\0', sizeof (struct symbol)); |
| |
| /* default assumptions */ |
| SYMBOL_VALUE (sym) = cs->c_value + off; |
| SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
| SYMBOL_SECTION (sym) = 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. */ |
| |
| SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced); |
| SYMBOL_TYPE (sym) = func_symbol_type; |
| |
| SYMBOL_CLASS (sym) = LOC_BLOCK; |
| SYMBOL_DUP (sym, sym2); |
| |
| if (cs->c_sclass == C_EXT) |
| add_symbol_to_list (sym2, &global_symbols); |
| else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT) |
| add_symbol_to_list (sym2, &file_symbols); |
| } |
| else |
| { |
| /* In case we can't figure out the type, provide default. */ |
| SYMBOL_TYPE (sym) = var_symbol_type; |
| |
| 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: |
| complain (&storclass_complaint, 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) |
| { |
| SYMBOL_SECTION (sym) = 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 == ':' || (pp = (char *) strchr (name, ':')) == NULL) |
| return NULL; |
| |
| ++pp; |
| if (*pp == 'V' && !within_function) |
| *pp = 'S'; |
| sym = define_symbol ((cs->c_value |
| + ANOFFSET (objfile->section_offsets, |
| static_block_section)), |
| cs->c_name, 0, 0, objfile); |
| if (sym != NULL) |
| { |
| SYMBOL_VALUE (sym) += static_block_base; |
| SYMBOL_SECTION (sym) = 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 (aux_entry, objfile) |
| union internal_auxent *aux_entry; |
| struct objfile *objfile; |
| { |
| static char buffer[BUFSIZ]; |
| |
| if (aux_entry->x_file.x_n.x_zeroes == 0) |
| strcpy (buffer, |
| ((struct coff_symfile_info *) objfile->sym_private)->strtbl |
| + aux_entry->x_file.x_n.x_offset); |
| else |
| { |
| strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN); |
| buffer[FILNMLEN] = '\0'; |
| } |
| return (buffer); |
| } |
| |
| /* Set *SYMBOL to symbol number symno in symtbl. */ |
| static void |
| read_symbol (symbol, symno) |
| struct internal_syment *symbol; |
| int symno; |
| { |
| int nsyms = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->symtbl_num_syms; |
| char *stbl = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->symtbl; |
| if (symno < 0 || symno >= nsyms) |
| { |
| static struct complaint msg = |
| {"Invalid symbol offset", 0, 0}; |
| complain (&msg); |
| symbol->n_value = 0; |
| symbol->n_scnum = -1; |
| return; |
| } |
| bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd, |
| stbl + (symno * local_symesz), |
| symbol); |
| } |
| |
| /* Get value corresponding to symbol number symno in symtbl. */ |
| |
| static int |
| read_symbol_nvalue (symno) |
| 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 (symno) |
| int symno; |
| { |
| int nsyms = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->symtbl_num_syms; |
| char *stbl = |
| ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private) |
| ->symtbl; |
| struct internal_syment symbol[1]; |
| union internal_auxent main_aux[1]; |
| |
| if (symno < 0) |
| { |
| complain (&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 && STREQ (symbol->n_name, ".bf")) |
| goto gotit; |
| symno += symbol->n_numaux + 1; |
| } |
| |
| complain (&bf_notfound_complaint); |
| return 0; |
| |
| gotit: |
| /* take aux entry and return its lineno */ |
| symno++; |
| bfd_coff_swap_aux_in (this_symtab_psymtab->objfile->obfd, |
| 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 (abfd, asect, vpinfo) |
| bfd *abfd; |
| sec_ptr asect; |
| PTR vpinfo; |
| { |
| struct coff_symfile_info *info; |
| int size, count; |
| file_ptr offset, maxoff; |
| |
| count = asect->lineno_count; |
| |
| if (!STREQ (asect->name, ".text") || count == 0) |
| return; |
| |
| size = count * coff_data (abfd)->local_linesz; |
| info = (struct coff_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_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); |
| |
| static void |
| xcoff_psymtab_to_symtab_1 (pst) |
| struct partial_symtab *pst; |
| { |
| struct cleanup *old_chain; |
| int i; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered |
| (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| /* Read in all partial symtabs on which this one is dependent */ |
| for (i = 0; i < pst->number_of_dependencies; i++) |
| if (!pst->dependencies[i]->readin) |
| { |
| /* Inform about additional files that need to be read in. */ |
| if (info_verbose) |
| { |
| fputs_filtered (" ", gdb_stdout); |
| wrap_here (""); |
| fputs_filtered ("and ", gdb_stdout); |
| wrap_here (""); |
| printf_filtered ("%s...", pst->dependencies[i]->filename); |
| wrap_here (""); /* Flush output */ |
| gdb_flush (gdb_stdout); |
| } |
| xcoff_psymtab_to_symtab_1 (pst->dependencies[i]); |
| } |
| |
| if (((struct symloc *) pst->read_symtab_private)->numsyms != 0) |
| { |
| /* Init stuff necessary for reading in symbols. */ |
| stabsread_init (); |
| buildsym_init (); |
| old_chain = make_cleanup (really_free_pendings, 0); |
| |
| read_xcoff_symtab (pst); |
| sort_symtab_syms (pst->symtab); |
| |
| do_cleanups (old_chain); |
| } |
| |
| pst->readin = 1; |
| } |
| |
| static void xcoff_psymtab_to_symtab PARAMS ((struct partial_symtab *)); |
| |
| /* Read in all of the symbols for a given psymtab for real. |
| Be verbose about it if the user wants that. */ |
| |
| static void |
| xcoff_psymtab_to_symtab (pst) |
| struct partial_symtab *pst; |
| { |
| bfd *sym_bfd; |
| |
| if (!pst) |
| return; |
| |
| if (pst->readin) |
| { |
| fprintf_unfiltered |
| (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n", |
| pst->filename); |
| return; |
| } |
| |
| if (((struct symloc *) pst->read_symtab_private)->numsyms != 0 |
| || pst->number_of_dependencies) |
| { |
| /* Print the message now, before reading the string table, |
| to avoid disconcerting pauses. */ |
| if (info_verbose) |
| { |
| printf_filtered ("Reading in symbols for %s...", pst->filename); |
| gdb_flush (gdb_stdout); |
| } |
| |
| sym_bfd = pst->objfile->obfd; |
| |
| next_symbol_text_func = xcoff_next_symbol_text; |
| |
| xcoff_psymtab_to_symtab_1 (pst); |
| |
| /* 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 (pst->objfile); |
| |
| /* Finish up the debug error message. */ |
| if (info_verbose) |
| printf_filtered ("done.\n"); |
| } |
| } |
| |
| static void |
| xcoff_new_init (objfile) |
| struct objfile *objfile; |
| { |
| stabsread_new_init (); |
| buildsym_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 (objfile) |
| struct objfile *objfile; |
| { |
| /* Allocate struct to keep track of the symfile */ |
| objfile->sym_private = xmmalloc (objfile->md, |
| sizeof (struct coff_symfile_info)); |
| |
| /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we |
| find this causes a significant slowdown in gdb then we could |
| set it in the debug symbol readers only when necessary. */ |
| objfile->flags |= OBJF_REORDERED; |
| |
| init_entry_point_info (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 (objfile) |
| struct objfile *objfile; |
| { |
| if (objfile->sym_private != NULL) |
| { |
| mfree (objfile->md, objfile->sym_private); |
| } |
| |
| /* Start with a fresh include table for the next objfile. */ |
| if (inclTable) |
| { |
| free (inclTable); |
| inclTable = NULL; |
| } |
| inclIndx = inclLength = inclDepth = 0; |
| } |
| |
| |
| static void |
| init_stringtab (abfd, offset, objfile) |
| bfd *abfd; |
| file_ptr offset; |
| struct objfile *objfile; |
| { |
| long length; |
| int val; |
| unsigned char lengthbuf[4]; |
| char *strtbl; |
| |
| ((struct coff_symfile_info *) objfile->sym_private)->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, 1, 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 symbol_obstack. We will need this table |
| as long as we have its symbol table around. */ |
| |
| strtbl = (char *) obstack_alloc (&objfile->symbol_obstack, length); |
| ((struct coff_symfile_info *) objfile->sym_private)->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, 1, 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; |
| |
| static struct partial_symtab *xcoff_start_psymtab |
| PARAMS ((struct objfile *, char *, int, |
| struct partial_symbol **, struct partial_symbol **)); |
| |
| /* 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 struct partial_symtab * |
| xcoff_start_psymtab (objfile, filename, first_symnum, global_syms, |
| static_syms) |
| struct objfile *objfile; |
| char *filename; |
| int first_symnum; |
| struct partial_symbol **global_syms; |
| struct partial_symbol **static_syms; |
| { |
| struct partial_symtab *result = |
| start_psymtab_common (objfile, objfile->section_offsets, |
| filename, |
| /* We fill in textlow later. */ |
| 0, |
| global_syms, static_syms); |
| |
| result->read_symtab_private = (char *) |
| obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc)); |
| ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum; |
| result->read_symtab = xcoff_psymtab_to_symtab; |
| |
| /* Deduce the source language from the filename for this psymtab. */ |
| psymtab_language = deduce_language_from_filename (filename); |
| |
| return result; |
| } |
| |
| static struct partial_symtab *xcoff_end_psymtab |
| PARAMS ((struct partial_symtab *, char **, int, int, |
| struct partial_symtab **, int, int)); |
| |
| /* 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 struct partial_symtab * |
| xcoff_end_psymtab (pst, include_list, num_includes, capping_symbol_number, |
| dependency_list, number_dependencies, textlow_not_set) |
| struct partial_symtab *pst; |
| char **include_list; |
| int num_includes; |
| int capping_symbol_number; |
| struct partial_symtab **dependency_list; |
| int number_dependencies; |
| int textlow_not_set; |
| { |
| int i; |
| struct objfile *objfile = pst->objfile; |
| |
| if (capping_symbol_number != -1) |
| ((struct symloc *) pst->read_symtab_private)->numsyms = |
| capping_symbol_number |
| - ((struct symloc *) pst->read_symtab_private)->first_symnum; |
| ((struct symloc *) pst->read_symtab_private)->lineno_off = |
| first_fun_line_offset; |
| first_fun_line_offset = 0; |
| pst->n_global_syms = |
| objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset); |
| pst->n_static_syms = |
| objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset); |
| |
| pst->number_of_dependencies = number_dependencies; |
| if (number_dependencies) |
| { |
| pst->dependencies = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| memcpy (pst->dependencies, dependency_list, |
| number_dependencies * sizeof (struct partial_symtab *)); |
| } |
| else |
| pst->dependencies = 0; |
| |
| for (i = 0; i < num_includes; i++) |
| { |
| struct partial_symtab *subpst = |
| allocate_psymtab (include_list[i], objfile); |
| |
| subpst->section_offsets = pst->section_offsets; |
| subpst->read_symtab_private = |
| (char *) obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct symloc)); |
| ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0; |
| ((struct symloc *) subpst->read_symtab_private)->numsyms = 0; |
| subpst->textlow = 0; |
| subpst->texthigh = 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 = (struct partial_symtab **) |
| obstack_alloc (&objfile->psymbol_obstack, |
| sizeof (struct partial_symtab *)); |
| subpst->dependencies[0] = pst; |
| subpst->number_of_dependencies = 1; |
| |
| subpst->globals_offset = |
| subpst->n_global_syms = |
| subpst->statics_offset = |
| subpst->n_static_syms = 0; |
| |
| subpst->readin = 0; |
| subpst->symtab = 0; |
| subpst->read_symtab = pst->read_symtab; |
| } |
| |
| sort_pst_symbols (pst); |
| |
| /* If there is already a psymtab or symtab for a file of this name, |
| remove it. (If there is a symtab, more drastic things also |
| happen.) This happens in VxWorks. */ |
| free_named_symtabs (pst->filename); |
| |
| if (num_includes == 0 |
| && number_dependencies == 0 |
| && pst->n_global_syms == 0 |
| && pst->n_static_syms == 0) |
| { |
| /* Throw away this psymtab, it's empty. We can't deallocate it, since |
| it is on the obstack, but we can forget to chain it on the list. */ |
| /* Empty psymtabs happen as a result of header files which don't have |
| any symbols in them. There can be a lot of them. */ |
| |
| discard_psymtab (pst); |
| |
| /* Indicate that psymtab was thrown away. */ |
| pst = (struct partial_symtab *) NULL; |
| } |
| return pst; |
| } |
| |
| static void swap_sym PARAMS ((struct internal_syment *, |
| union internal_auxent *, char **, char **, |
| unsigned int *, |
| struct objfile *)); |
| |
| /* 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 (symbol, aux, name, raw, symnump, objfile) |
| struct internal_syment *symbol; |
| union internal_auxent *aux; |
| char **name; |
| char **raw; |
| unsigned int *symnump; |
| struct objfile *objfile; |
| { |
| bfd_coff_swap_sym_in (objfile->obfd, *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 = obstack_alloc (&objfile->psymbol_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 = ((struct coff_symfile_info *) objfile->sym_private)->debugsec |
| + symbol->n_offset; |
| } |
| else |
| { |
| *name = ((struct coff_symfile_info *) objfile->sym_private)->strtbl |
| + symbol->n_offset; |
| } |
| ++*symnump; |
| *raw += coff_data (objfile->obfd)->local_symesz; |
| if (symbol->n_numaux > 0) |
| { |
| bfd_coff_swap_aux_in (objfile->obfd, *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 |
| scan_xcoff_symtab (objfile) |
| struct objfile *objfile; |
| { |
| CORE_ADDR toc_offset = 0; /* toc offset value in data section. */ |
| char *filestring = NULL; |
| |
| char *namestring; |
| int past_first_source_file = 0; |
| bfd *abfd; |
| asection *bfd_sect; |
| unsigned int nsyms; |
| |
| /* Current partial symtab */ |
| struct partial_symtab *pst; |
| |
| /* List of current psymtab's include files */ |
| char **psymtab_include_list; |
| int includes_allocated; |
| int includes_used; |
| |
| /* Index within current psymtab dependency list */ |
| struct partial_symtab **dependency_list; |
| int dependencies_used, dependencies_allocated; |
| |
| char *sraw_symbol; |
| struct internal_syment symbol; |
| union internal_auxent main_aux[5]; |
| unsigned int ssymnum; |
| |
| char *last_csect_name = NULL; /* last seen csect's name and value */ |
| CORE_ADDR last_csect_val = 0; |
| int last_csect_sec = 0; |
| int misc_func_recorded = 0; /* true if any misc. function */ |
| int textlow_not_set = 1; |
| |
| pst = (struct partial_symtab *) 0; |
| |
| includes_allocated = 30; |
| includes_used = 0; |
| psymtab_include_list = (char **) alloca (includes_allocated * |
| sizeof (char *)); |
| |
| dependencies_allocated = 30; |
| dependencies_used = 0; |
| dependency_list = |
| (struct partial_symtab **) alloca (dependencies_allocated * |
| sizeof (struct partial_symtab *)); |
| |
| last_source_file = NULL; |
| |
| abfd = objfile->obfd; |
| |
| sraw_symbol = ((struct coff_symfile_info *) objfile->sym_private)->symtbl; |
| nsyms = ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms; |
| ssymnum = 0; |
| while (ssymnum < nsyms) |
| { |
| int sclass = ((struct external_syment *) sraw_symbol)->e_sclass[0] & 0xff; |
| /* This is the type we pass to partial-stab.h. A less kludgy solution |
| would be to break out partial-stab.h into its various parts--shuffle |
| off the DBXREAD_ONLY stuff to dbxread.c, and make separate |
| pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */ |
| int stype; |
| |
| QUIT; |
| |
| switch (sclass) |
| { |
| case C_EXT: |
| case C_HIDEXT: |
| { |
| /* 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, |
| 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 |
| (last_csect_name, last_csect_val, |
| mst_text, last_csect_sec, |
| objfile); |
| } |
| |
| if (pst != NULL) |
| { |
| /* We have to allocate one psymtab for |
| each program csect, because their text |
| sections need not be adjacent. */ |
| xcoff_end_psymtab |
| (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 |
| (objfile, |
| filestring, |
| symnum_before, |
| objfile->global_psymbols.next, |
| objfile->static_psymbols.next); |
| } |
| } |
| if (namestring && namestring[0] == '.') |
| { |
| last_csect_name = namestring; |
| last_csect_val = symbol.n_value; |
| last_csect_sec = |
| secnum_to_section (symbol.n_scnum, objfile); |
| } |
| if (pst != NULL) |
| { |
| CORE_ADDR highval = |
| symbol.n_value + csect_aux.x_csect.x_scnlen.l; |
| if (highval > pst->texthigh) |
| pst->texthigh = highval; |
| if (pst->textlow == 0 || symbol.n_value < pst->textlow) |
| pst->textlow = symbol.n_value; |
| } |
| misc_func_recorded = 0; |
| break; |
| |
| case XMC_RW: |
| /* Data variables are recorded in the minimal symbol |
| table, except for section symbols. */ |
| if (*namestring != '.') |
| prim_record_minimal_symbol_and_info |
| (namestring, symbol.n_value, |
| sclass == C_HIDEXT ? mst_file_data : mst_data, |
| NULL, secnum_to_section (symbol.n_scnum, objfile), |
| NULL, 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 (objfile->obfd, 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 |
| (namestring, symbol.n_value, |
| sclass == C_HIDEXT ? mst_file_text : mst_text, |
| secnum_to_section (symbol.n_scnum, objfile), |
| objfile); |
| 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 |
| (namestring, symbol.n_value, |
| mst_solib_trampoline, |
| secnum_to_section (symbol.n_scnum, objfile), |
| objfile); |
| 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 != '.') |
| prim_record_minimal_symbol_and_info |
| (namestring, symbol.n_value, |
| sclass == C_HIDEXT ? mst_file_data : mst_data, |
| NULL, secnum_to_section (symbol.n_scnum, objfile), |
| NULL, 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 != '.') |
| prim_record_minimal_symbol_and_info |
| (namestring, symbol.n_value, |
| sclass == C_HIDEXT ? mst_file_bss : mst_bss, |
| NULL, secnum_to_section (symbol.n_scnum, objfile), |
| NULL, 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 |
| (last_csect_name, last_csect_val, |
| mst_text, last_csect_sec, objfile); |
| } |
| |
| if (pst) |
| { |
| xcoff_end_psymtab (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 (objfile, |
| filestring, |
| symnum_before, |
| objfile->global_psymbols.next, |
| objfile->static_psymbols.next); |
| last_csect_name = NULL; |
| } |
| break; |
| |
| default: |
| { |
| static struct complaint msg = |
| {"Storage class %d not recognized during scan", 0, 0}; |
| complain (&msg, sclass); |
| } |
| /* FALLTHROUGH */ |
| |
| /* C_FCN is .bf and .ef symbols. I think it is sufficient |
| to handle only the C_FUN and C_EXT. */ |
| case C_FCN: |
| |
| 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 = |
| ((struct external_syment *) sraw_symbol)->e_numaux[0] + 1; |
| ssymnum += naux1; |
| sraw_symbol += sizeof (struct external_syment) * naux1; |
| } |
| break; |
| |
| case C_BINCL: |
| stype = N_SOL; |
| goto pstab; |
| |
| 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: |
| stype = N_LSYM; |
| pstab:; |
| swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol, |
| &ssymnum, objfile); |
| #define CUR_SYMBOL_TYPE stype |
| #define CUR_SYMBOL_VALUE symbol.n_value |
| |
| /* START_PSYMTAB and END_PSYMTAB are never used, because they are only |
| called from DBXREAD_ONLY or N_SO code. Likewise for the symnum |
| variable. */ |
| #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms) 0 |
| #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\ |
| do {} while (0) |
| /* We have already set the namestring. */ |
| #define SET_NAMESTRING() /* */ |
| |
| #include "partial-stab.h" |
| } |
| } |
| |
| if (pst) |
| { |
| xcoff_end_psymtab (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. */ |
| |
| ((struct coff_symfile_info *) objfile->sym_private)->toc_offset = toc_offset; |
| } |
| |
| /* Return the toc offset value for a given objfile. */ |
| |
| CORE_ADDR |
| get_toc_offset (objfile) |
| struct objfile *objfile; |
| { |
| if (objfile) |
| return ((struct coff_symfile_info *) objfile->sym_private)->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). |
| MAINLINE is true if we are reading the main symbol |
| table (as opposed to a shared lib or dynamically loaded file). */ |
| |
| static void |
| xcoff_initial_scan (objfile, mainline) |
| struct objfile *objfile; |
| int mainline; /* FIXME comments above */ |
| { |
| bfd *abfd; |
| int val; |
| struct cleanup *back_to; |
| int num_symbols; /* # of symbols */ |
| file_ptr symtab_offset; /* symbol table and */ |
| file_ptr stringtab_offset; /* string table file offsets */ |
| struct coff_symfile_info *info; |
| char *name; |
| unsigned int size; |
| |
| info = (struct coff_symfile_info *) objfile->sym_private; |
| symfile_bfd = abfd = objfile->obfd; |
| name = objfile->name; |
| |
| 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. */ |
| { |
| sec_ptr secp; |
| bfd_size_type length; |
| char *debugsec = NULL; |
| |
| secp = bfd_get_section_by_name (abfd, ".debug"); |
| if (secp) |
| { |
| length = bfd_section_size (abfd, secp); |
| if (length) |
| { |
| debugsec = |
| (char *) obstack_alloc (&objfile->symbol_obstack, length); |
| |
| if (!bfd_get_section_contents (abfd, secp, debugsec, |
| (file_ptr) 0, length)) |
| { |
| error ("Error reading .debug section of `%s': %s", |
| name, bfd_errmsg (bfd_get_error ())); |
| } |
| } |
| } |
| ((struct coff_symfile_info *) objfile->sym_private)->debugsec = |
| 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; |
| ((struct coff_symfile_info *) objfile->sym_private)->symtbl = |
| obstack_alloc (&objfile->symbol_obstack, size); |
| ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms = |
| num_symbols; |
| |
| val = bfd_read (((struct coff_symfile_info *) objfile->sym_private)->symtbl, |
| size, 1, abfd); |
| if (val != size) |
| perror_with_name ("reading symbol table"); |
| |
| /* If we are reinitializing, or if we have never loaded syms yet, init */ |
| if (mainline |
| || objfile->global_psymbols.size == 0 |
| || objfile->static_psymbols.size == 0) |
| /* I'm not sure how how good num_symbols is; the rule of thumb in |
| init_psymbol_list was developed for a.out. On the one hand, |
| num_symbols includes auxents. On the other hand, it doesn't |
| include N_SLINE. */ |
| init_psymbol_list (objfile, num_symbols); |
| |
| free_pending_blocks (); |
| back_to = make_cleanup (really_free_pendings, 0); |
| |
| init_minimal_symbol_collection (); |
| make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0); |
| |
| /* Now that the symbol table data of the executable file are all in core, |
| process them and define symbols accordingly. */ |
| |
| scan_xcoff_symtab (objfile); |
| |
| /* Install any minimal symbols that have been collected as the current |
| minimal symbols for this objfile. */ |
| |
| install_minimal_symbols (objfile); |
| |
| do_cleanups (back_to); |
| } |
| |
| static void |
| xcoff_symfile_offsets (objfile, addrs) |
| struct objfile *objfile; |
| struct section_addr_info *addrs; |
| { |
| int i; |
| |
| objfile->num_sections = SECT_OFF_MAX; |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| |
| /* syms_from_objfile kindly subtracts from addr the bfd_section_vma |
| of the .text section. This strikes me as wrong--whether the |
| offset to be applied to symbol reading is relative to the start |
| address of the section depends on the symbol format. In any |
| event, this whole "addr" concept is pretty broken (it doesn't |
| handle any section but .text sensibly), so just ignore the addr |
| parameter and use 0. rs6000-nat.c will set the correct section |
| offsets via objfile_relocate. */ |
| for (i = 0; i < objfile->num_sections; ++i) |
| ANOFFSET (objfile->section_offsets, i) = 0; |
| } |
| |
| /* Register our ability to parse symbols for xcoff BFD files. */ |
| |
| static struct sym_fns xcoff_sym_fns = |
| { |
| |
| /* Because the bfd uses coff_flavour, we need to specially kludge |
| the flavour. 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). */ |
| |
| (enum bfd_flavour) -1, |
| |
| xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| xcoff_initial_scan, /* sym_read: read a symbol file into symtab */ |
| xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */ |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_xcoffread () |
| { |
| add_symtab_fns (&xcoff_sym_fns); |
| |
| func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0, |
| "<function, no debug info>", NULL); |
| TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int; |
| var_symbol_type = |
| init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0, |
| "<variable, no debug info>", NULL); |
| } |