-/* Read AIXcoff symbol tables and convert to internal format, for GDB.
- Copyright (C) 1986-1991 Free Software Foundation, Inc.
+/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
+ Free Software Foundation, Inc.
Derived from coffread.c, dbxread.c, and a lot of hacking.
Contributed by IBM Corporation.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
+/* Native only: Need struct tbtable in <sys/debug.h> from host, and
+ need xcoff_add_toc_to_loadinfo in rs6000-tdep.c from target.
+ need xcoff_init_loadinfo ditto.
+ However, if you grab <sys/debug.h> and make it available on your
+ host, and define FAKING_RS6000, then this code will compile. */
+
#include "defs.h"
#include "bfd.h"
-/* AIX COFF names have a preceeding dot `.' */
-#define NAMES_HAVE_DOT 1
-
#include <sys/types.h>
#include <fcntl.h>
#include <ctype.h>
+#include <string.h>
#include "obstack.h"
#include <sys/param.h>
+#ifndef NO_SYS_FILE
#include <sys/file.h>
+#endif
#include <sys/stat.h>
+#include <sys/debug.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 "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. */
+\f
+/* 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;
+};
-#include "coff/internal.h" /* FIXME, internal data from BFD */
-#include "libcoff.h" /* FIXME, internal data from BFD */
-#include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
-
-extern char *index();
-
-static void enter_line_range ();
-static struct symbol *process_xcoff_symbol ();
-static int read_symbol_nvalue ();
-static int read_symbol_lineno ();
+/* Remember what we deduced to be the source language of this psymtab. */
+static enum language psymtab_language = language_unknown;
+\f
/* Simplified internal version of coff symbol table information */
struct coff_symbol {
char *c_name;
int c_symnum; /* symbol number of this entry */
- int c_nsyms; /* 0 if syment only, 1 if syment + auxent */
+ int c_naux; /* 0 if syment only, 1 if syment + auxent */
long c_value;
- int c_sclass;
+ unsigned char c_sclass;
int c_secnum;
unsigned int c_type;
};
This is calculated from the first function seen after a C_FILE
symbol. */
-static CORE_ADDR cur_src_start_addr;
+
static CORE_ADDR cur_src_end_addr;
/* Core address of the end of the first object file. */
static CORE_ADDR first_object_file_end;
-/* pointer to the string table */
-static char *strtbl;
-
-/* length of the string table */
-static int strtbl_len;
-
-/* pointer to debug section */
-static char *debugsec;
-
-/* pointer to the a.out symbol table */
-static char *symtbl;
-
/* initial symbol-table-debug-string vector length */
#define INITIAL_STABVECTOR_LENGTH 40
-struct pending_stabs *global_stabs;
-struct pending_stabs *file_stabs;
-
/* Nonzero if within a function (so symbols should be local,
if nothing says specifically). */
int within_function;
-/* Local variables that hold the shift and mask values for the
- COFF file that we are currently reading. These come back to us
- from BFD, and are referenced by their macro names, as well as
- internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
- macros from ../internalcoff.h . */
-
-static unsigned local_n_btshft;
-static unsigned local_n_tmask;
-
-#undef N_BTSHFT
-#define N_BTSHFT local_n_btshft
-#undef N_TMASK
-#define N_TMASK local_n_tmask
-
-/* Local variables that hold the sizes in the file of various COFF structures.
- (We only need to know this to read them from the file -- BFD will then
- translate the data in them, into `internal_xxx' structs in the right
- byte order, alignment, etc.) */
+/* 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;
-/* coff_symfile_init()
- is the coff-specific initialization routine for reading symbols.
- It is passed a struct sym_fns which contains, among other things,
- the BFD for the file whose symbols are being read, and a slot for
- a pointer to "private data" which we fill with cookies and other
- treats for coff_symfile_read().
-
- We will only be called if this is a COFF or COFF-like file.
- BFD handles figuring out the format of the file, and code in symtab.c
- uses BFD's determination to vector to us.
-
- The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
-
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;
};
+static struct complaint rsym_complaint =
+ {"Non-stab C_RSYM `%s' needs special handling", 0, 0};
+
+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};
+
+extern struct complaint ef_complaint;
+extern struct complaint eb_complaint;
+
+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 struct section_offsets *
+xcoff_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
+
+static void
+find_linenos PARAMS ((bfd *, sec_ptr, PTR));
+
+static char *
+coff_getfilename PARAMS ((union internal_auxent *, struct objfile *));
-/* Call sort_syms to sort alphabetically
- the symbols of each block of each symtab. */
+static void
+read_symbol PARAMS ((struct internal_syment *, int));
static int
-compare_symbols (s1, s2)
-struct symbol **s1, **s2;
-{
- /* Names that are less should come first. */
- register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0)
- return namediff;
-
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
-}
+read_symbol_lineno PARAMS ((int));
+static int
+read_symbol_nvalue PARAMS ((int));
-/* Sort a vector of symbols by their value. */
+static struct symbol *
+process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *));
static void
-sort_syms ()
-{
- register struct symtab *s;
- register int i, nbl;
- register struct blockvector *bv;
- register struct block *b;
+read_xcoff_symtab PARAMS ((struct partial_symtab *));
- for (s = symtab_list; s; s = s->next)
- {
- bv = BLOCKVECTOR (s);
- nbl = BLOCKVECTOR_NBLOCKS (bv);
- for (i = 0; i < nbl; i++)
+static void
+add_stab_to_list PARAMS ((char *, struct pending_stabs **));
+
+\f
+/* Translate from a COFF section number (target_index) to a SECT_OFF_*
+ code. */
+static int secnum_to_section PARAMS ((int, struct objfile *));
+
+struct find_targ_sec_arg {
+ int targ_index;
+ int *resultp;
+};
+
+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)
{
- b = BLOCKVECTOR_BLOCK (bv, i);
- if (BLOCK_SHOULD_SORT (b))
- qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
- sizeof (struct symbol *), compare_symbols);
+ /* 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;
}
- }
}
-
+/* 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;
+ struct find_targ_sec_arg args;
+ args.targ_index = secnum;
+ args.resultp = &off;
+ bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
+ return off;
+}
+\f
/* add a given stab string into given stab vector. */
static void
else if ((*stabvector)->count >= (*stabvector)->length) {
(*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
*stabvector = (struct pending_stabs *)
- xrealloc (*stabvector, sizeof (struct pending_stabs) +
+ xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
(*stabvector)->length * sizeof (char*));
}
(*stabvector)->stab [(*stabvector)->count++] = stabname;
}
+\f
+/* 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. */
+
+/* compare line table entry addresses. */
-
-/* for all the stabs in a given stab vector, build appropriate types
- and fix their symbols in given symbol vector. */
-
-void
-patch_block_stabs (symbols, stabs)
-struct pending *symbols;
-struct pending_stabs *stabs;
+static int
+compare_lte (lte1, lte2)
+ struct linetable_entry *lte1, *lte2;
{
- int ii;
-
- if (!stabs)
- return;
-
- /* for all the stab entries, find their corresponding symbols and
- patch their types! */
-
- for (ii=0; ii < stabs->count; ++ii) {
- char *name = stabs->stab[ii];
- char *pp = (char*) index (name, ':');
- struct symbol *sym = find_symbol_in_list (symbols, name, pp-name);
- if (!sym) {
- printf ("ERROR! stab symbol not found!\n"); /* FIXME */
- }
- else {
- pp += 2;
-
- if (*(pp-1) == 'F' || *(pp-1) == 'f')
- SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp));
- else
- SYMBOL_TYPE (sym) = read_type (&pp);
- }
- }
+ return lte1->pc - lte2->pc;
}
-/* Enter a given range of lines into the line vector.
- can be called in the following two ways:
- enter_line_range (subfile, beginoffset, endoffset, 0, firstLine) or
- enter_line_range (subfile, beginoffset, 0, endaddr, firstLine) */
+/* Give a line table with function entries are marked, arrange its functions
+ in assending 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 void
-enter_line_range (subfile, beginoffset, endoffset, endaddr, firstLine)
- struct subfile *subfile; /* which sub-file to put line#s in */
- unsigned beginoffset, endoffset; /* offsets to line table */
- CORE_ADDR endaddr;
- unsigned *firstLine;
+static struct linetable *
+arrange_linetable (oldLineTb)
+ struct linetable *oldLineTb; /* old linetable */
{
- char *pp, *limit;
- CORE_ADDR addr;
- struct internal_lineno lptr;
- unsigned local_linesz = coff_data (symfile_bfd)->local_linesz;
+ int ii, jj,
+ newline, /* new line count */
+ function_count; /* # of functions */
- pp = &linetab [beginoffset - linetab_offset];
- limit = endoffset ? &linetab [endoffset - linetab_offset]
- : &linetab [linetab_size -1];
+ struct linetable_entry *fentry; /* function entry vector */
+ int fentry_size; /* # of function entries */
+ struct linetable *newLineTb; /* new line table */
- while (pp <= limit) {
+#define NUM_OF_FUNCTIONS 20
- /* Swap and align this lineno entry into lptr. */
- bfd_coff_swap_lineno_in (symfile_bfd, pp, &lptr);
+ fentry_size = NUM_OF_FUNCTIONS;
+ fentry = (struct linetable_entry*)
+ xmalloc (fentry_size * sizeof (struct linetable_entry));
- /* find the address this line represents */
- addr = lptr.l_lnno ?
- lptr.l_addr.l_paddr : read_symbol_nvalue (symtbl, lptr.l_addr.l_symndx);
+ for (function_count=0, ii=0; ii <oldLineTb->nitems; ++ii) {
- if (endaddr && addr >= endaddr)
- return;
+ if (oldLineTb->item[ii].line == 0) { /* function entry found. */
- if (lptr.l_lnno == 0) {
- *firstLine = read_symbol_lineno (symtbl, lptr.l_addr.l_symndx);
- --(*firstLine);
+ 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;
}
- else
- record_line (subfile, *firstLine + lptr.l_lnno, addr);
+ }
- pp += local_linesz;
+ 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. */
-/* 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)); \
- cur_src_start_addr = start_addr; \
-}
+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;
-/* 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. */
+#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 */
-/* Reading symbol table has to be fast! Keep the followings as macros, rather
- than functions. */
+static void allocate_include_entry PARAMS ((void));
-#define RECORD_MISC_FUNCTION(NAME, ADDR, TYPE, ALLOCED) \
-{ \
- char *namestr; \
- if (ALLOCED) \
- namestr = (NAME) + 1; \
- else { \
- namestr = obstack_copy0 (symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
- (ALLOCED) = 1; \
- } \
- prim_record_misc_function (namestr, (ADDR), (TYPE)); \
- last_recorded_fun = (ADDR); \
-}
+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;
+}
-/* aixcoff 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;
+static void
+record_include_end (cs)
+struct coff_symbol *cs;
+{
+ InclTable *pTbl;
-/* true if space for symbol name has been allocated. */
+ if (inclDepth == 0)
+ {
+ static struct complaint msg = {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
+ complain (&msg);
+ }
-static int symname_alloced = 0;
+ allocate_include_entry ();
-/* read the whole symbol table of a given bfd. */
+ pTbl = &inclTable [inclIndx];
+ pTbl->end = cs->c_value;
-void
-read_xcoff_symtab (objfile, nsyms)
- struct objfile *objfile; /* Object file we're reading from */
- int nsyms; /* # of symbols */
-{
- bfd *abfd = objfile->obfd;
- /* char *symtbl; */ /* Raw symbol table base */
- char *raw_symbol; /* Pointer into raw seething symbol table */
- char *raw_auxptr; /* Pointer to first raw aux entry for sym */
- struct internal_syment symbol[1];
- union internal_auxent main_aux[1];
- struct coff_symbol cs[1];
- CORE_ADDR file_start_addr = 0;
- CORE_ADDR file_end_addr = 0;
+ --inclDepth;
+ ++inclIndx;
+}
- int next_file_symnum = -1;
- int just_started = 1;
- int depth = 0;
- int val;
- int fcn_first_line;
- int fcn_last_line;
- int fcn_start_addr;
- long fcn_line_offset;
- size_t size;
+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);
+ }
+}
- /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
- union internal_auxent fcn_aux_saved;
- struct context_stack *new;
+/* Global variable to pass the psymtab down to all the routines involved
+ in psymtab to symtab processing. */
+static struct partial_symtab *this_symtab_psymtab;
- char *filestring = " _start_ "; /* Name of the current file. */
- char *last_seen_csect;
- int last_recorded_fun = 0; /* last recorded fun. value */
+/* given the start and end addresses of a compilation unit (or a csect,
+ at times) process its lines and create appropriate line vectors. */
- /* Get the appropriate COFF "constants" related to the file we're handling. */
- N_TMASK = coff_data (abfd)->local_n_tmask;
- N_BTSHFT = coff_data (abfd)->local_n_btshft;
- local_symesz = coff_data (abfd)->local_symesz;
+static void
+process_linenos (start, end)
+ CORE_ADDR start, end;
+{
+ char *pp;
+ int offset, ii;
+ file_ptr max_offset =
+ ((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
+ ->max_lineno_offset;
- last_source_file = 0;
- last_seen_csect = 0;
- last_recorded_fun = 0;
+ /* subfile structure for the main compilation unit. */
+ struct subfile main_subfile;
- start_symtab (filestring, (char *)NULL, file_start_addr);
- symnum = 0;
- first_object_file_end = 0;
+ /* 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(). */
- /* Allocate space for the entire symbol table at once, and read it
- all in. The bfd is already positioned at the beginning of
- the symbol table. */
+ int main_source_baseline = 0;
- size = coff_data (abfd)->local_symesz * nsyms;
- symtbl = xmalloc (size);
+ unsigned *firstLine;
+ CORE_ADDR addr;
- val = bfd_read (symtbl, size, 1, abfd);
- if (val != size)
- perror_with_name ("reading symbol table");
+ offset =
+ ((struct symloc *)this_symtab_psymtab->read_symtab_private)->lineno_off;
+ if (offset == 0)
+ goto return_after_cleanup;
- raw_symbol = symtbl;
+ memset (&main_subfile, '\0', sizeof (main_subfile));
- while (symnum < nsyms) {
+ if (inclIndx == 0)
+ /* All source lines were in the main source file. None in include files. */
- QUIT; /* make this command interruptable. */
+ enter_line_range (&main_subfile, offset, 0, start, end,
+ &main_source_baseline);
- /* 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 aixcoff will be freed. Thus we can mark symbols with names
- in string table as `alloced'. */
+ else
{
- 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_nsyms = 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;
- } 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 & 0xff;
- cs->c_secnum = symbol->n_scnum;
- cs->c_type = (unsigned)symbol->n_type;
-
- raw_symbol += coff_data (abfd)->local_symesz;
- ++symnum;
+ /* 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);
+ }
- raw_auxptr = raw_symbol; /* Save addr of first aux entry */
+ /* Have a new subfile for the include file. */
- /* Skip all the auxents associated with this symbol. */
- for (ii = symbol->n_numaux; ii; --ii ) {
- raw_symbol += coff_data (abfd)->local_auxesz;
- ++symnum;
- }
- }
+ tmpSubfile = inclTable[ii].subfile =
+ (struct subfile *) xmalloc (sizeof (struct subfile));
- /* if symbol name starts with ".$" or "$", ignore it. */
- if (cs->c_name[0] == '$' || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
- continue;
+ memset (tmpSubfile, '\0', sizeof (struct subfile));
+ firstLine = &(inclTable[ii].funStartLine);
- if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) {
- if (last_source_file)
- end_symtab (cur_src_end_addr, 1, 1, objfile);
+ /* Enter include file's lines now. */
+ enter_line_range (tmpSubfile, inclTable[ii].begin,
+ inclTable[ii].end, start, 0, firstLine);
- start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0);
- cur_src_end_addr = first_object_file_end;
- /* done with all files, everything from here on is globals */
- }
+ offset = inclTable[ii].end + LINESZ;
+ }
- /* 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,
- main_aux);
- goto function_entry_point;
+ /* 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);
+ }
}
- if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_nsyms == 1)
+ /* Process main file's line numbers. */
+ if (main_subfile.line_vector)
{
- /* dealing with a symbol with a csect entry. */
+ struct linetable *lineTb, *lv;
-# define CSECT(PP) ((PP)->x_csect)
-# define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
-# 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)
+ lv = main_subfile.line_vector;
- /* Convert the auxent to something we can access. */
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- main_aux);
+ /* Line numbers are not necessarily ordered. xlc compilation will
+ put static function to the end. */
- switch (CSECT_SMTYP (main_aux)) {
+ 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;
+ }
- case XTY_ER :
- continue; /* ignore all external references. */
+ current_subfile->line_vector_length =
+ current_subfile->line_vector->nitems;
+ }
- case XTY_SD : /* a section description. */
- {
- switch (CSECT_SCLAS (main_aux)) {
+ /* Now, process included files' line numbers. */
- case XMC_PR : /* a `.text' csect. */
- {
+ for (ii=0; ii < inclIndx; ++ii)
+ {
+ if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */
+ {
+ struct linetable *lineTb, *lv;
- /* A program csect is seen.
-
- We have to allocate one symbol table for each program csect. Normally
- gdb prefers one symtab for each compilation unit (CU). In case of AIX, one
- CU might include more than one prog csect, and they don't have to be
- adjacent in terms of the space they occupy in memory. Thus, one single
- CU might get fragmented in the memory and gdb's file start and end address
- approach does not work! */
-
- if (last_seen_csect) {
- complete_symtab (filestring, file_start_addr);
- cur_src_end_addr = file_end_addr;
- end_symtab (file_end_addr, 1, 1, objfile);
- start_symtab ((char *)NULL, (char *)NULL, (CORE_ADDR)0);
- }
+ lv = (inclTable[ii].subfile)->line_vector;
- /* 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;
- }
+ /* Line numbers are not necessarily ordered. xlc compilation will
+ put static function to the end. */
- file_start_addr = cs->c_value;
- file_end_addr = cs->c_value + CSECT_LEN (main_aux);
+ lineTb = arrange_linetable (lv);
- if (cs->c_name && cs->c_name[0] == '.') {
- last_seen_csect = cs->c_name;
- RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_text, symname_alloced);
- }
- }
- continue;
+ push_subfile ();
- case XMC_RW :
- break;
+ /* For the same include file, we might want to have more than one
+ subfile. This happens if we have something like:
- /* If the section is not a data description, ignore it. Note that
- uninitialized data will show up as XTY_CM/XMC_RW pair. */
+ ......
+ #include "foo.h"
+ ......
+ #include "foo.h"
+ ......
- case XMC_TC0:
-#ifdef XCOFF_ADD_TOC_TO_LOADINFO
- XCOFF_ADD_TOC_TO_LOADINFO (cs->c_value);
-#endif
- /* fall down to default case. */
+ 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. */
- case XMC_TC : /* ignore toc entries */
- default : /* any other XMC_XXX */
- continue;
- }
- }
- break; /* switch CSECT_SCLAS() */
-
- case XTY_LD :
-
- /* a function entry point. */
- if (CSECT_SCLAS (main_aux) == XMC_PR) {
-
-function_entry_point:
- if (cs->c_value != last_recorded_fun)
- RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_text,
- symname_alloced);
-
- fcn_line_offset = main_aux->x_sym.x_fcnary.x_fcn.x_lnnoptr;
- 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;
+#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 = strdup (inclTable[ii].name);
+#endif
- /* shared library function entry point. */
- else if (CSECT_SCLAS (main_aux) == XMC_GL) {
- if (last_recorded_fun != cs->c_value)
- RECORD_MISC_FUNCTION (cs->c_name, cs->c_value, mf_text,
- symname_alloced);
- continue;
- }
- break;
+ if (lv == lineTb)
+ {
+ current_subfile->line_vector =
+ (struct linetable *) xrealloc
+ (lv, (sizeof (struct linetable)
+ + lv->nitems * sizeof (struct linetable_entry)));
- default : /* all other XTY_XXXs */
- break;
- } /* switch CSECT_SMTYP() */
+ }
+ else
+ {
+ free (lv);
+ current_subfile->line_vector = lineTb;
+ }
+
+ current_subfile->line_vector_length =
+ current_subfile->line_vector->nitems;
+ start_subfile (pop_subfile (), (char*)0);
+ }
}
- switch (cs->c_sclass) {
+ 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));
+}
- case C_FILE:
+void
+aix_process_linenos ()
+{
+ /* process line numbers and enter them into line vector */
+ process_linenos (last_source_start_addr, cur_src_end_addr);
+}
- /* 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;
+/* 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)
- /* complete symbol table for last object file containing
- debugging information. */
+ endoffset points to the last line table entry that we should pay
+ attention to. */
- /* Whether or not there was a csect in the previous file, we have
- to call `end_symtab' and `start_symtab' 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, 1, 1, objfile);
- start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0);
- last_seen_csect = 0;
+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;
- /* 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;
+ 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;
- filestring = cs->c_name;
- break;
+ 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;
+ }
+}
- case C_FCN:
- if (strcmp (cs->c_name, ".bf") == 0) {
+typedef struct {
+ int fsize; /* file size */
+ int fixedparms; /* number of fixed parms */
+ int floatparms; /* number of float parms */
+ unsigned int parminfo; /* parameter info.
+ See /usr/include/sys/debug.h
+ tbtable_ext.parminfo */
+ int framesize; /* function frame size */
+} TracebackInfo;
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- main_aux);
+static TracebackInfo *retrieve_tracebackinfo
+ PARAMS ((bfd *, struct coff_symbol *));
- within_function = 1;
+/* Given a function symbol, return its traceback information. */
- /* value contains address of first non-init type code */
- /* main_aux.x_sym.x_misc.x_lnsz.x_lnno
- contains line number of '{' } */
- fcn_first_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno;
+static TracebackInfo *
+retrieve_tracebackinfo (abfd, cs)
+ bfd *abfd;
+ struct coff_symbol *cs;
+{
+#define TBTABLE_BUFSIZ 2000
- /* Linenos are now processed on a file-by-file, not fn-by-fn, basis.
- Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */
- /* mark_first_line (fcn_line_offset, cs->c_symnum); */
+ static TracebackInfo tbInfo;
+ struct tbtable *ptb;
- new = push_context (0, fcn_start_addr);
- new->name = process_xcoff_symbol (&fcn_cs_saved);
- }
- else if (strcmp (cs->c_name, ".ef") == 0) {
+ static char buffer [TBTABLE_BUFSIZ];
- bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
- main_aux);
+ int *pinsn;
+ int bytesread=0; /* total # of bytes read so far */
+ int bufferbytes; /* number of bytes in the buffer */
+ int functionstart;
- /* 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 '}' */
+ asection *textsec;
- fcn_last_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno;
+ /* FIXME: Should be looking through all sections, based on the
+ address we are considering. Just using ".text" loses if more
+ than one section has code in it. */
+ textsec = bfd_get_section_by_name (abfd, ".text");
+ if (!textsec)
+ {
#if 0
- enter_linenos (fcn_line_offset, fcn_first_line,
- fcn_first_line + fcn_last_line);
+ /* If there is only data, no text, that is OK. */
+ printf_unfiltered ("Unable to locate text section!\n");
#endif
+ return;
+ }
- new = pop_context ();
- if (context_stack_depth != 0)
- error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
- symnum);
+ functionstart = cs->c_value - textsec->vma;
- 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);
- within_function = 0;
- }
- break;
-
- case C_BSTAT : /* begin static block */
- static_block_base = read_symbol_nvalue (symtbl, cs->c_value);
- break;
-
- case C_ESTAT : /* end of static block */
- static_block_base = 0;
- break;
-
- case C_ARG : /* These are not implemented. */
- case C_REGPARM :
- case C_TPDEF :
- case C_STRTAG :
- case C_UNTAG :
- case C_ENTAG :
- printf ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass);
- break;
-
- case C_HIDEXT : /* ignore these.. */
- case C_LABEL :
- case C_NULL :
- break;
-
- case C_BINCL : /* beginning of include file */
- push_subfile ();
- start_subfile (cs->c_name, (char *)0);
- fcn_first_line = cs->c_value; /* Offset to first lineno of file */
- break;
-
- case C_EINCL : /* end of include file */
- fcn_last_line = cs->c_value; /* Offset to last line number */
- { long dummy = 0;
- enter_line_range (current_subfile, fcn_first_line, cs->c_value, 0,
- &dummy);
- }
- start_subfile (pop_subfile (), (char *)0);
- break;
+ memset (&tbInfo, '\0', sizeof (tbInfo));
- case C_BLOCK :
- if (strcmp (cs->c_name, ".bb") == 0) {
- depth++;
- new = push_context (depth, cs->c_value);
- }
- else if (strcmp (cs->c_name, ".eb") == 0) {
- new = pop_context ();
- if (depth != new->depth)
- error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
- symnum);
-
- depth--;
- 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);
- }
- local_symbols = new->locals;
- }
- break;
+ /* keep reading blocks of data from the text section, until finding a zero
+ word and a traceback table. */
- default :
- (void) process_xcoff_symbol (cs);
- break;
- }
+ /* Note: The logical thing way to write this code would be to assign
+ to bufferbytes within the while condition. But that triggers a
+ compiler (xlc in AIX 3.2) bug, so simplify it... */
+ bufferbytes =
+ (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ?
+ TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread));
+ while (bufferbytes
+ && (bfd_get_section_contents
+ (abfd, textsec, buffer,
+ (file_ptr)(functionstart + bytesread), bufferbytes)))
+ {
+ bytesread += bufferbytes;
+ pinsn = (int*) buffer;
- } /* while */
+ /* If this is the first time we filled the buffer, retrieve function
+ framesize info. */
- if (last_source_file)
- end_symtab (cur_src_end_addr, 1, 1, objfile);
+ if (bytesread == bufferbytes) {
- free (symtbl);
-}
+ /* skip over unrelated instructions */
-#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
- (SYMBOL2) = (struct symbol *) \
- obstack_alloc (symbol_obstack, sizeof (struct symbol)); \
- *(SYMBOL2) = *(SYMBOL1);
-
-
-#define SYMNAME_ALLOC(NAME, ALLOCED) \
- (ALLOCED) ? (NAME) : obstack_copy0 (symbol_obstack, (NAME), strlen (NAME));
+ if (*pinsn == 0x7c0802a6) /* mflr r0 */
+ ++pinsn;
+ if ((*pinsn & 0xfc00003e) == 0x7c000026) /* mfcr Rx */
+ ++pinsn;
+ if ((*pinsn & 0xfc000000) == 0x48000000) /* bl foo, save fprs */
+ ++pinsn;
+ if ((*pinsn & 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
+ ++pinsn;
+ do {
+ int tmp = (*pinsn >> 16) & 0xffff;
+ if (tmp == 0x9421) { /* stu r1, NUM(r1) */
+ tbInfo.framesize = 0x10000 - (*pinsn & 0xffff);
+ break;
+ }
+ else if ((*pinsn == 0x93e1fffc) || /* st r31,-4(r1) */
+ (tmp == 0x9001)) /* st r0, NUM(r1) */
+ ;
+ /* else, could not find a frame size. */
+ else
+ return NULL;
-/* process one xcoff symbol. */
+ } while (++pinsn && *pinsn);
-static struct symbol *
-process_xcoff_symbol (cs)
- register struct coff_symbol *cs;
-{
- struct symbol onesymbol;
- register struct symbol *sym = &onesymbol;
- struct symbol *sym2 = NULL;
- struct type *ttype;
- char *name, *pp, *qq;
+ if (!tbInfo.framesize)
+ return NULL;
- name = cs->c_name;
- if (name[0] == '.')
- ++name;
+ }
- bzero (sym, sizeof (struct symbol));
+ /* look for a zero word. */
- /* default assumptions */
- SYMBOL_VALUE (sym) = cs->c_value;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int))))
+ ++pinsn;
- if (ISFCN (cs->c_type)) {
+ if (pinsn >= (int*)(buffer + bufferbytes))
+ continue;
- /* At this point, we don't know the type of the function and assume it
- is int. This will be patched with the type from its stab entry later
- on in patch_block_stabs () */
+ if (*pinsn == 0) {
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_TYPE (sym) = lookup_function_type (builtin_type_int);
+ /* function size is the amount of bytes we have skipped so far. */
+ tbInfo.fsize = bytesread - (buffer + bufferbytes - (char*)pinsn);
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_DUP (sym, sym2);
+ ++pinsn;
- 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);
- }
+ /* if we don't have the whole traceback table in the buffer, re-read
+ the whole thing. */
- else {
+ /* This is how much to read to get the traceback table.
+ 8 bytes of the traceback table are always present, plus we
+ look at parminfo. */
+#define MIN_TBTABSIZ 12
+
+ if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) {
- /* in case we can't figure out the type, default is `int'. */
- SYMBOL_TYPE (sym) = builtin_type_int;
+ /* In case if we are *very* close to the end of the text section
+ and cannot read properly from that point on, abort by returning
+ NULL.
- switch (cs->c_sclass)
- {
- 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;
+ This could happen if the traceback table is only 8 bytes,
+ but we try to read 12 bytes of it.
+ Handle this case more graciously -- FIXME */
- case C_DECL: /* a type decleration?? */
- qq = (char*) index (name, ':');
- if (!qq) /* skip if there is no ':' */
- return NULL;
+ if (!bfd_get_section_contents (
+ abfd, textsec, buffer,
+ (file_ptr)(functionstart +
+ bytesread - (buffer + bufferbytes - (char*)pinsn)),MIN_TBTABSIZ))
+ { printf_unfiltered ("Abnormal return!..\n"); return NULL; }
- pp = qq + 2;
- ttype = SYMBOL_TYPE (sym) = read_type (&pp);
+ ptb = (struct tbtable *)buffer;
+ }
+ else
+ ptb = (struct tbtable *)pinsn;
- /* read_type() will return null if type (or tag) definition was
- unnnecessarily duplicated. Also, if the symbol doesn't have a name,
- there is no need to keep it in symbol table. */
+ tbInfo.fixedparms = ptb->tb.fixedparms;
+ tbInfo.floatparms = ptb->tb.floatparms;
+ tbInfo.parminfo = ptb->tb_ext.parminfo;
+ return &tbInfo;
+ }
+ bufferbytes =
+ (TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ?
+ TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread));
+ }
+ return NULL;
+}
- if (!ttype || name == qq)
- return NULL;
+/* 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. */
- if (qq[1] == 'T')
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- else if (qq[1] == 't')
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- else {
- printf ("ERROR: Unrecognized stab string.\n");
- return NULL;
+#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), (OBJFILE)); \
+ misc_func_recorded = 1; \
+}
+
+
+/* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized
+ in our initializer function at the bottom of the file, to avoid
+ dependencies on the exact "struct symbol" format. */
+
+static struct symbol parmsym;
+
+/* Add a parameter to a given pending symbol list. */
+
+#define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
+{ \
+ PARM = (struct symbol *) \
+ obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
+ *(PARM) = parmsym; \
+ SYMBOL_TYPE (PARM) = PTYPE; \
+ SYMBOL_VALUE (PARM) = VALUE; \
+ add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
+}
+
+
+/* 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 ()
+{
+ struct internal_syment symbol;
+ static struct complaint msg =
+ {"Unexpected symbol continuation", 0, 0};
+ char *retval;
+ struct objfile *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 */
+ TracebackInfo *ptb; /* Pointer to traceback table */
+ 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 val;
+ int fcn_start_addr;
+ size_t size;
+
+ struct coff_symbol fcn_stab_saved;
+
+ /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
+ union internal_auxent fcn_aux_saved;
+ struct type *fcn_type_saved = NULL;
+ 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;
+ int misc_func_recorded; /* true if any misc. function */
+
+ 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;
+ misc_func_recorded = 0;
+
+ start_stabs ();
+ start_symtab (filestring, (char *)NULL, file_start_addr);
+ 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, 1, 0, objfile, SECT_OFF_TEXT);
+ end_stabs ();
+ }
+
+ start_stabs ();
+ start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0);
+ cur_src_end_addr = first_object_file_end;
+ /* done with all files, everything from here on is globals */
}
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_NAME (sym) = obsavestring (name, qq-name);
+ /* 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 (SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE)
- TYPE_NAME (ttype) = concat (
- TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " :
- TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ",
- SYMBOL_NAME (sym), NULL);
+ if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
+ && cs->c_naux == 1)
+ {
+ /* Dealing with a symbol with a csect entry. */
- else if (!TYPE_NAME (ttype)) /* else, regular typedef. */
- TYPE_NAME (ttype) = SYMBOL_NAME (sym);
+#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)
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- break;
+ /* 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);
- case C_GSYM:
- add_stab_to_list (name, &global_stabs);
- break;
+ switch (CSECT_SMTYP (&main_aux))
+ {
- case C_PSYM:
- if (*name == ':' || (pp = (char *) index (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name);
- SYMBOL_CLASS (sym) = LOC_ARG;
- pp += 2;
- SYMBOL_TYPE (sym) = read_type (&pp);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_STSYM:
- if (*name == ':' || (pp = (char *) index (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE (sym) += static_block_base;
- pp += 2;
- SYMBOL_TYPE (sym) = read_type (&pp);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- break;
-
- case C_LSYM:
- if (*name == ':' || (pp = (char *) index (name, ':')) == NULL)
- return NULL;
- SYMBOL_NAME (sym) = obsavestring (name, pp-name);
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- pp += 1;
- SYMBOL_TYPE (sym) = read_type (&pp);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_AUTO:
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
+ case XTY_ER:
+ /* Ignore all external references. */
+ continue;
- case C_EXT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &global_symbols);
- break;
+ 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, 1, 0, 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);
+ }
+
+ /* 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);
+ }
+ }
+ misc_func_recorded = 0;
+ continue;
+
+ case XMC_RW :
+ break;
+
+ /* If the section is not a data description,
+ ignore it. Note that uninitialized data will
+ show up as XTY_CM/XMC_RW pair. */
+
+ case XMC_TC0:
+ continue;
+
+ case XMC_TC:
+ continue;
+
+ default:
+ /* Ignore the symbol. */
+ continue;
+ }
+ }
+ break;
- case C_STAT:
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list
- (sym2, within_function ? &local_symbols : &file_symbols);
- 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;
+
+ ptb = NULL;
+
+ /* If function has two auxent, then debugging information is
+ already available for it. Process traceback table for
+ functions with only one auxent. */
+
+ if (cs->c_naux == 1)
+ ptb = retrieve_tracebackinfo (abfd, cs);
+
+ else if (cs->c_naux != 2)
+ {
+ static struct complaint msg =
+ {"Expected one or two auxents for function", 0, 0};
+ complain (&msg);
+ }
+
+ /* If there is traceback info, create and add parameters
+ for it. */
+
+ if (ptb && (ptb->fixedparms || ptb->floatparms))
+ {
+
+ int parmcnt = ptb->fixedparms + ptb->floatparms;
+ char *parmcode = (char*) &ptb->parminfo;
+
+ /* The link area is 0x18 bytes. */
+ int parmvalue = ptb->framesize + 0x18;
+ unsigned int ii, mask;
+
+ for (ii=0, mask = 0x80000000; ii <parmcnt; ++ii)
+ {
+ struct symbol *parm;
+
+ if (ptb->parminfo & mask)
+ {
+ /* float or double */
+ mask = mask >> 1;
+ if (ptb->parminfo & mask)
+ {
+ /* double parm */
+ ADD_PARM_TO_PENDING
+ (parm, parmvalue, builtin_type_double,
+ local_symbols);
+ parmvalue += sizeof (double);
+ }
+ else
+ {
+ /* float parm */
+ ADD_PARM_TO_PENDING
+ (parm, parmvalue, builtin_type_float,
+ local_symbols);
+ parmvalue += sizeof (float);
+ }
+ }
+ else
+ {
+ static struct type *intparm_type;
+ if (intparm_type == NULL)
+ {
+
+ /* Create a type, which is a pointer
+ type (a kludge to make it print
+ in hex), but which has a name
+ indicating we don't know the real
+ type. */
+
+ intparm_type =
+ init_type
+ (TYPE_CODE_PTR,
+ TARGET_PTR_BIT / HOST_CHAR_BIT,
+ 0,
+ "<non-float parameter>",
+ NULL);
+ TYPE_TARGET_TYPE (intparm_type) =
+ builtin_type_void;
+ }
+ ADD_PARM_TO_PENDING
+ (parm, parmvalue,
+ intparm_type,
+ local_symbols);
+ parmvalue += sizeof (int);
+ }
+ mask = mask >> 1;
+ }
+
+ /* Fake this as a function. Needed in
+ process_xcoff_symbol(). */
+ cs->c_type = 32;
+
+ finish_block
+ (process_xcoff_symbol (cs, objfile), &local_symbols,
+ pending_blocks, cs->c_value,
+ cs->c_value + ptb->fsize, objfile);
+ }
+ 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. We still need to record them. This will
+ typically be XMC_RW; I suspect XMC_RO and XMC_BS might
+ be possible too. */
+ break;
+ }
+
+ 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, 1, 0, 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);
+ 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 '}' */
+
+ 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:
+ 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"))
+ {
+ new = pop_context ();
+ if (depth-- != new->depth)
+ {
+ complain (&eb_complaint, 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, 1, 0, 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) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
+
+
+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;
+ struct type *ttype;
+ char *name, *pp, *qq;
+ int struct_and_type_combined;
+ int nameless;
+
+ 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. */
- case C_REG:
- printf ("ERROR! C_REG is not fully implemented!\n");
- SYMBOL_CLASS (sym) = LOC_REGISTER;
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
+ SYMBOL_TYPE (sym) = func_symbol_type;
+
+ SYMBOL_CLASS (sym) = LOC_BLOCK;
SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
-
- case C_RSYM:
- pp = (char*) index (name, ':');
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (cs->c_value);
- if (pp) {
- SYMBOL_NAME (sym) = obsavestring (name, pp-name);
- pp += 2;
- if (*pp)
- SYMBOL_TYPE (sym) = read_type (&pp);
- }
- else
- /* else this is not a stab entry, suppose the type is either
- `int' or `float', depending on the register class. */
- SYMBOL_TYPE (sym) = (SYMBOL_VALUE (sym) < 32) ?
- builtin_type_int : builtin_type_float;
+ 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
+ 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;
+#endif
- SYMBOL_DUP (sym, sym2);
- add_symbol_to_list (sym2, &local_symbols);
- break;
+ case C_GSYM:
+ add_stab_to_list (name, &global_stabs);
+ break;
- default :
- printf ("ERROR: Unexpected storage class: %d.\n", cs->c_sclass);
- return NULL;
+ 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:
+
+ {
+ 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;
+
+#if 0
+ /* These appear to be vestigial remnants of coffread.c; I don't
+ think any of them are used for xcoff. */
+
+ case C_AUTO:
+ SYMBOL_CLASS (sym) = LOC_LOCAL;
+ SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
+ SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
+ SYMBOL_DUP (sym, sym2);
+ add_symbol_to_list (sym2, &local_symbols);
+ break;
+
+ case C_STAT:
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
+ SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
+ SYMBOL_DUP (sym, sym2);
+ add_symbol_to_list
+ (sym2, within_function ? &local_symbols : &file_symbols);
+ break;
+
+ case C_RSYM:
+ pp = (char*) strchr (name, ':');
+ if (pp)
+ {
+ sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
+ if (sym != NULL)
+ SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
+ return sym;
+ }
+ else
+ {
+ complain (&rsym_complaint, name);
+ return NULL;
+ }
+#endif /* 0 */
+
+ /* I think this one is used (dubious, I think, shouldn't
+ it go into the msyms only?). */
+ case C_EXT:
+ SYMBOL_CLASS (sym) = LOC_STATIC;
+ SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
+ SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
+ SYMBOL_DUP (sym, sym2);
+ add_symbol_to_list (sym2, &global_symbols);
+ break;
+
+ }
}
- }
return sym2;
}
+/* Extract the file name from the aux entry of a C_FILE symbol. Return
+ only the last component of the name. 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];
+ register char *temp;
+ char *result;
+
+ 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';
+ }
+ result = buffer;
+
+ /* FIXME: We should not be throwing away the information about what
+ directory. It should go into dirname of the symtab, or some such
+ place. */
+ if ((temp = strrchr (result, '/')) != NULL)
+ result = temp + 1;
+ return (result);
+}
+
+/* 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 (symtable, symno)
- char *symtable;
+read_symbol_nvalue (symno)
int symno;
{
struct internal_syment symbol[1];
- bfd_coff_swap_sym_in (symfile_bfd, symtable + (symno*local_symesz), symbol);
+ 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 (symtable, symno)
- char *symtable;
- int symno;
+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];
- int ii;
+ if (symno < 0)
+ {
+ complain (&bf_notfound_complaint);
+ return 0;
+ }
- for (ii = 0; ii < 50; ii++) {
- bfd_coff_swap_sym_in (symfile_bfd,
- symtable + (symno*local_symesz), symbol);
- if (symbol->n_sclass == C_FCN && 0 == strcmp (symbol->n_name, ".bf"))
- goto gotit;
- symno += symbol->n_numaux+1;
- }
+ /* 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;
+ }
- printf ("GDB Error: `.bf' not found.\n");
+ complain (&bf_notfound_complaint);
return 0;
gotit:
/* take aux entry and return its lineno */
symno++;
- bfd_coff_swap_aux_in (symfile_bfd, symtable+(symno*local_symesz),
- symbol->n_type, symbol->n_sclass, main_aux);
+ 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;
}
* mainline code can read the whole thing for efficiency.
*/
static void
-find_linenos(abfd, asect, vpinfo)
-bfd *abfd;
-sec_ptr asect;
-void *vpinfo;
+find_linenos (abfd, asect, vpinfo)
+ bfd *abfd;
+ sec_ptr asect;
+ PTR vpinfo;
{
struct coff_symfile_info *info;
int size, count;
count = asect->lineno_count;
- if (count == 0)
+ if (!STREQ (asect->name, ".text") || count == 0)
return;
- size = count * coff_data (symfile_bfd)->local_linesz;
- info = (struct coff_symfile_info *)vpinfo;
+ size = count * coff_data (abfd)->local_linesz;
+ info = (struct coff_symfile_info *)vpinfo;
offset = asect->line_filepos;
maxoff = offset + size;
if (maxoff > info->max_lineno_offset)
info->max_lineno_offset = maxoff;
}
+\f
+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;
-/* Read in all the line numbers for fast lookups later. Leave them in
- external (unswapped) format in memory; we'll swap them as we enter
- them into GDB's data structures. */
+ if (pst->readin)
+ {
+ fprintf_unfiltered
+ (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
+ }
-static int
-init_lineno (abfd, offset, size)
- bfd *abfd;
- long offset;
- int size;
-{
- int val;
+ /* 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 (bfd_seek(abfd, offset, 0) < 0)
- return -1;
+ 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);
- linetab = (char *) xmalloc(size);
+ read_xcoff_symtab (pst);
+ sort_symtab_syms (pst->symtab);
- val = bfd_read(linetab, 1, size, abfd);
- if (val != size)
- return -1;
+ do_cleanups (old_chain);
+ }
- linetab_offset = offset;
- linetab_size = size;
- make_cleanup(free, linetab); /* Be sure it gets de-allocated. */
- return 0;
+ pst->readin = 1;
}
+static void xcoff_psymtab_to_symtab PARAMS ((struct partial_symtab *));
-void
-dump_strtbl ()
-{
- int ii;
- printf ("===STRING TABLE DUMP...\n\n");
- for ( ii=0; ii < strtbl_len; ++ii )
- printf ("%c", isprint (*(strtbl+ii)) ? *(strtbl+ii) : ' ');
- printf ("\n");
-}
+/* Read in all of the symbols for a given psymtab for real.
+ Be verbose about it if the user wants that. */
-void
-dump_linetable (ltb)
- struct linetable *ltb;
+static void
+xcoff_psymtab_to_symtab (pst)
+ struct partial_symtab *pst;
{
- int ii;
- for (ii=0; ii < ltb->nitems; ++ii)
- printf ("line: %d, addr: 0x%x\n", ltb->item[ii].line, ltb->item[ii].pc);
-}
+ bfd *sym_bfd;
-void
-dump_type (typeP)
- struct type *typeP;
-{
- printf ("0x%x: name: %s\n", typeP, typeP->name ? typeP->name : "(nil)");
-}
+ if (!pst)
+ return;
-char *dump_namespace ();
-char *dump_addrclass ();
+ if (pst->readin)
+ {
+ fprintf_unfiltered
+ (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
+ }
-void
-dump_symbol (pp)
- struct symbol *pp;
-{
- printf (" sym: %s\t%s,\t%s\ttype: 0x%x, val: 0x%x end: 0x%x\n",
- pp->name, dump_namespace (pp->namespace),
- dump_addrclass (pp->class), pp->type,
- SYMBOL_CLASS(pp) == LOC_BLOCK ? BLOCK_START(SYMBOL_BLOCK_VALUE(pp))
- : pp->value.value,
- SYMBOL_CLASS(pp) == LOC_BLOCK ? BLOCK_END(SYMBOL_BLOCK_VALUE(pp)) : 0);
-}
+ 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;
-char *
-dump_namespace (ns)
-int ns;
-{
- static char *ns_name [] = {
- "UNDEF_NS", "VAR_NS", "STRUCT_NS", "LABEL_NS"};
-
- switch (ns) {
- case UNDEF_NAMESPACE:
- case VAR_NAMESPACE:
- case STRUCT_NAMESPACE:
- case LABEL_NAMESPACE:
- return ns_name[ns];
- }
-
- return "***ERROR***";
-}
+ next_symbol_text_func = xcoff_next_symbol_text;
+ xcoff_psymtab_to_symtab_1 (pst);
-char *
-dump_addrclass (ac)
-int ac; /* address class */
-{
- static char *ac_name [] = {
- "LOC_UNDEF",
- "LOC_CONST",
- "LOC_STATIC",
- "LOC_REGISTER",
- "LOC_ARG",
- "LOC_REF_ARG",
- "LOC_REGPARM",
- "LOC_LOCAL",
- "LOC_TYPEDEF",
- "LOC_LABEL",
- "LOC_BLOCK",
- "LOC_CONST_BYTES",
- "LOC_LOCAL_ARG",
- };
- switch (ac) {
- case LOC_UNDEF:
- case LOC_CONST:
- case LOC_STATIC:
- case LOC_REGISTER:
- case LOC_ARG:
- case LOC_REF_ARG:
- case LOC_REGPARM:
- case LOC_LOCAL:
- case LOC_TYPEDEF:
- case LOC_LABEL:
- case LOC_BLOCK:
- case LOC_CONST_BYTES:
- case LOC_LOCAL_ARG:
- return ac_name [ac];
- }
- return "***ERROR***";
-}
+ /* 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);
-void
-dump_block (pp)
- struct block *pp;
+ /* Finish up the debug error message. */
+ if (info_verbose)
+ printf_filtered ("done.\n");
+ }
+}
+\f
+static void
+xcoff_new_init (objfile)
+ struct objfile *objfile;
{
- int ii;
- printf ("BLOCK..: start: 0x%x, end: 0x%x\n", pp->startaddr, pp->endaddr);
- for (ii=0; ii < pp->nsyms; ++ii)
- dump_symbol (pp->sym[ii]);
}
-void
-dump_blockvector (pp)
- struct blockvector *pp;
+/* 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;
{
- int ii;
- for (ii=0; ii < pp->nblocks; ++ii)
- dump_block (pp->block [ii]);
+ /* Allocate struct to keep track of the symfile */
+ objfile -> sym_private = xmmalloc (objfile -> md,
+ sizeof (struct coff_symfile_info));
+ 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. */
-void
-dump_last_symtab (pp)
- struct symtab *pp;
+static void
+xcoff_symfile_finish (objfile)
+ struct objfile *objfile;
{
- for ( ; pp; pp = pp->next) {
- if ( pp->next == 0 ) {
- printf ("SYMTAB NAME: %s\n", pp->filename);
- dump_blockvector (pp->blockvector);
+ if (objfile -> sym_private != NULL)
+ {
+ mfree (objfile -> md, objfile -> sym_private);
}
- }
-}
-void
-dump_symtabs (pp)
- struct symtab *pp;
-{
- for ( ; pp; pp = pp->next) {
- printf ("SYMTAB NAME: %s\n", pp->filename ? pp->filename : "(nil)");
-/* if (pp->linetable)
- dump_linetable (pp->linetable); */
- dump_blockvector (pp->blockvector);
- }
+ /* Start with a fresh include table for the next objfile. */
+ if (inclTable)
+ {
+ free (inclTable);
+ inclTable = NULL;
+ }
+ inclIndx = inclLength = inclDepth = 0;
}
-void
-dump_symtab_lines (pp)
- struct symtab *pp;
-{
- for ( ; pp; pp = pp->next) {
- printf ("SYMTAB NAME: %s\n", pp->filename ? pp->filename : "(nil)");
- if (pp->linetable)
- dump_linetable (pp->linetable);
- /* dump_blockvector (pp->blockvector); */
- }
-}
-void
-dump_misc_funcs ()
+static void
+init_stringtab (abfd, offset, objfile)
+ bfd *abfd;
+ file_ptr offset;
+ struct objfile *objfile;
{
- int ii;
- for (ii=0; ii < misc_function_count; ++ii)
- printf ("name: %s, addr: 0x%x\n",
- misc_function_vector[ii].name,
- misc_function_vector[ii].address);
-}
+ long length;
+ int val;
+ unsigned char lengthbuf[4];
+ char *strtbl;
+ ((struct coff_symfile_info *)objfile->sym_private)->strtbl = NULL;
-/* dbx allows the text of a symbol name to be continued into the
- next symbol name! When such a continuation is encountered
- (a \ at the end of the text of a name)
- call this function to get the continuation. */
-/* So far, I haven't seen this happenning xlc output. I doubt we'll need this
- for aixcoff. */
+ if (bfd_seek (abfd, offset, L_SET) < 0)
+ error ("cannot seek to string table in %s: %s",
+ bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
-#undef next_symbol_text
-#define next_symbol_text() \
- printf ("Gdb Error: symbol names on multiple lines not implemented.\n")
+ 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. */
-/* xlc/dbx combination uses a set of builtin types, starting from -1. return
- the proper type node fora given builtin type #. */
+ if (val != sizeof lengthbuf || length < sizeof lengthbuf)
+ return;
-struct type *
-builtin_type (pp)
-char **pp;
-{
- int typenums[2];
+ /* Allocate string table from symbol_obstack. We will need this table
+ as long as we have its symbol table around. */
- if (**pp != '-') {
- printf ("ERROR!, unknown built-in type!\n");
- return NULL;
- }
- *pp += 1;
- read_type_number (pp, typenums);
-
- /* default types are defined in dbxstclass.h. */
- switch ( typenums[1] ) {
- case 1:
- return builtin_type_int;
- case 2:
- return builtin_type_char;
- case 3:
- return builtin_type_short;
- case 4:
- return builtin_type_long;
- case 5:
- return builtin_type_unsigned_char;
- case 6:
- return builtin_type_char; /* requires a builtin `signed char' */
- case 7:
- return builtin_type_unsigned_short;
- case 8:
- return builtin_type_unsigned_int;
- case 9:
- return builtin_type_unsigned_int;
- case 10:
- return builtin_type_unsigned_long;
- case 11:
- return builtin_type_void;
- case 12:
- return builtin_type_float;
- case 13:
- return builtin_type_double;
- case 14:
- return builtin_type_double; /* requires a builtin `long double' */
- case 15:
- return builtin_type_int; /* requires a builtin `integer' */
- case 16:
- return builtin_type_int; /* requires builtin `boolean' */
- case 17:
- return builtin_type_float; /* requires builtin `short real' */
- case 18:
- return builtin_type_float; /* requires builtin `real' */
- default :
- printf ("ERROR! Unknown builtin type -%d\n", typenums[1]);
- return NULL;
- }
-}
+ strtbl = (char *) obstack_alloc (&objfile->symbol_obstack, length);
+ ((struct coff_symfile_info *)objfile->sym_private)->strtbl = strtbl;
+
+ if (length == sizeof lengthbuf)
+ return;
+
+ val = bfd_read (strtbl + sizeof lengthbuf, 1, length - sizeof lengthbuf,
+ abfd);
-/* if we now nothing about a function but its address, make a function symbol
- out of it with the limited knowladge you have. This will be used when
- somebody refers to a function, which doesn't exist in the symbol table,
- but in misc_function_vector. */
+ 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");
-struct symbol *
-build_function_symbol (ind)
- int ind;
+ return;
+}
+\f
+/* 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 *, struct section_offsets *, 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, section_offsets,
+ filename, first_symnum, global_syms, static_syms)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ char *filename;
+ int first_symnum;
+ struct partial_symbol *global_syms;
+ struct partial_symbol *static_syms;
{
- struct symbol *sym =
- (struct symbol *) obstack_alloc (symbol_obstack, sizeof (struct symbol));
- SYMBOL_NAME (sym) = misc_function_vector[ind].name;
- /* SYMBOL_VALUE (sym) = misc_function_vector[ind].address; */
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_TYPE (sym) = lookup_function_type (builtin_type_int);
- SYMBOL_BLOCK_VALUE (sym) = (struct block *)
- obstack_alloc (symbol_obstack, sizeof (struct block));
- BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) = misc_function_vector[ind].address;
- return sym;
+ struct partial_symtab *result =
+ start_psymtab_common (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));
-void
-aixcoff_new_init ()
+/* 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)
+ struct partial_symtab *pst;
+ char **include_list;
+ int num_includes;
+ int capping_symbol_number;
+ struct partial_symtab **dependency_list;
+ int number_dependencies;
{
- /* Nothin' to do. */
+ 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. But this check
+ is wrong, in that a psymtab with N_SLINE entries but nothing else
+ is not empty, but we don't realize that. Fixing that without slowing
+ things down might be tricky. (FIXME: For XCOFF, it shouldn't be
+ tricky at all). */
+ struct partial_symtab *prev_pst;
+
+ /* First, snip it out of the psymtab chain */
+
+ if (pst->objfile->psymtabs == pst)
+ pst->objfile->psymtabs = pst->next;
+ else
+ for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
+ if (prev_pst->next == pst)
+ prev_pst->next = pst->next;
+
+ /* Next, put it on a free list for recycling */
+
+ pst->next = pst->objfile->free_psymtabs;
+ pst->objfile->free_psymtabs = pst;
+
+ /* Indicate that psymtab was thrown away. */
+ pst = (struct partial_symtab *)NULL;
+ }
+ return pst;
}
-void
-aixcoff_symfile_init (sf)
-struct sym_fns *sf;
+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 *abfd = sf->sym_bfd;
+ 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);
- /* Allocate struct to keep track of the symfile */
- /* FIXME memory leak */
- sf->sym_private = xmalloc(sizeof (struct coff_symfile_info));
-
- /*
- * Save startup file's range of PC addresses to help
- * blockframe.c decide where the bottom of the stack is.
- */
- if (bfd_get_file_flags(abfd) & EXEC_P) {
- entry_point = bfd_get_start_address(abfd);
- } else {
- entry_point = ~0;
- /* set the startup file to be an empty range. */
- startup_file_start = 0;
- startup_file_end = 0;
- }
+ *symnump += symbol->n_numaux;
+ *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
+ }
}
-
-static int
-init_stringtab(abfd, offset)
- bfd *abfd;
- long offset;
+static void
+scan_xcoff_symtab (section_offsets, objfile)
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
{
- long length;
- int val;
- unsigned char lengthbuf[4];
+ int toc_offset = 0; /* toc offset value in data section. */
+ char *filestring;
+
+ char *namestring;
+ int nsl;
+ int past_first_source_file = 0;
+ CORE_ADDR last_o_file_start = 0;
+ struct cleanup *back_to;
+ bfd *abfd;
+ unsigned int nsyms;
- if (bfd_seek(abfd, offset, 0) < 0)
- return -1;
+ /* Current partial symtab */
+ struct partial_symtab *pst;
- val = bfd_read((char *)lengthbuf, 1, sizeof lengthbuf, abfd);
- length = bfd_h_get_32(abfd, lengthbuf);
+ /* List of current psymtab's include files */
+ char **psymtab_include_list;
+ int includes_allocated;
+ int includes_used;
- /* If no string table is needed, then the file may end immediately
- after the symbols. Just return with `strtbl' set to null. */
+ /* Index within current psymtab dependency list */
+ struct partial_symtab **dependency_list;
+ int dependencies_used, dependencies_allocated;
- if (val != sizeof length || length < sizeof length)
- return 0;
+ char *sraw_symbol;
+ struct internal_syment symbol;
+ union internal_auxent main_aux;
+ unsigned int ssymnum;
- /* Allocate string table from symbol_obstack. We will need this table
- as long as we have its symbol table around. */
+ char *last_csect_name = NULL; /* last seen csect's name and value */
+ CORE_ADDR last_csect_val;
+ int last_csect_sec;
+ int misc_func_recorded; /* true if any misc. function */
- strtbl = (char*) obstack_alloc (symbol_obstack, length);
- if (strtbl == NULL)
- return -1;
+ pst = (struct partial_symtab *) 0;
- bcopy(&length, strtbl, sizeof length);
- if (length == sizeof length)
- return 0;
+ includes_allocated = 30;
+ includes_used = 0;
+ psymtab_include_list = (char **) alloca (includes_allocated *
+ sizeof (char *));
- val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd);
+ dependencies_allocated = 30;
+ dependencies_used = 0;
+ dependency_list =
+ (struct partial_symtab **) alloca (dependencies_allocated *
+ sizeof (struct partial_symtab *));
- if (val != length - sizeof length || strtbl[length - 1] != '\0')
- return -1;
+ last_source_file = NULL;
- return 0;
-}
+ abfd = objfile->obfd;
-static int
-init_debugsection(abfd)
- bfd *abfd;
-{
- register sec_ptr secp;
- bfd_size_type length;
+ 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];
+ /* 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;
- if (debugsec) {
- free(debugsec);
- debugsec = NULL;
- }
+ swap_sym (&symbol, &main_aux, &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;
- secp = bfd_get_section_by_name(abfd, ".debug");
- if (!secp)
- return 0;
+ 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);
+ includes_used = 0;
+ dependencies_used = 0;
+ /* Give all psymtabs for this source file the same
+ name. */
+ pst = xcoff_start_psymtab
+ (objfile, section_offsets,
+ 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:
+ break;
+ case XMC_TC0:
+ if (toc_offset)
+ warning ("More than one XMC_TC0 symbol found.");
+ toc_offset = symbol.n_value;
+ 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. */
+ char *namestr = namestring;
+
+ if (first_fun_line_offset == 0)
+ first_fun_line_offset =
+ main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
+ if (namestr[0] == '.')
+ ++namestr;
+ prim_record_minimal_symbol_and_info
+ (namestr, symbol.n_value, mst_text,
+ NULL, secnum_to_section (symbol.n_scnum, objfile),
+ objfile);
+ misc_func_recorded = 1;
+
+ /* We also create full symbols for these, so
+ better make a partial symbol. This seems bogus
+ to me, but I'm not going to try to fix it now.
+ (Note that allocate_space_in_inferior can't
+ yet deal with a minimal symbol for malloc on xcoff
+ because it doesn't understand the fact that
+ function pointers don't just contain the address of
+ the function). */
+ ADD_PSYMBOL_ADDR_TO_LIST (namestr, strlen (namestr),
+ VAR_NAMESPACE, LOC_BLOCK,
+ objfile->global_psymbols,
+ symbol.n_value,
+ psymtab_language, 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. */
+
+ /* FIXME: Shouldn't these be going into the minimal
+ symbols instead of partial/full symbols? */
+
+ ADD_PSYMBOL_ADDR_TO_LIST (namestring, strlen (namestring),
+ VAR_NAMESPACE, LOC_STATIC,
+ objfile->global_psymbols,
+ symbol.n_value,
+ psymtab_language, objfile);
+ break;
+ }
+ default:
+ break;
+ }
+ }
+ break;
+ case C_FILE:
+ {
+ unsigned int symnum_before;
- if (!(length = bfd_section_size(abfd, secp)))
- return 0;
+ symnum_before = ssymnum;
+ swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
+ &ssymnum, objfile);
- debugsec = (void *) xmalloc ((unsigned)length);
- if (debugsec == NULL)
- return -1;
+ /* See if the last csect needs to be recorded. */
- if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) {
- printf ("Can't read .debug section from symbol file\n");
- return -1;
- }
- return 0;
-}
+ if (last_csect_name && !misc_func_recorded)
+ {
-static void
-free_debugsection()
-{
- if (debugsec)
- free(debugsec);
- debugsec = NULL;
+ /* 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);
+ 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, objfile);
+ }
+ else
+ filestring = namestring;
+
+ pst = xcoff_start_psymtab (objfile, section_offsets,
+ 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, &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,secoff,fname,low,symoff,global_syms,static_syms) 0
+#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
+ do {} while (0)
+/* We have already set the namestring. */
+#define SET_NAMESTRING() 0
+
+#include "partial-stab.h"
+ }
+ }
+#if 0
+ /* What is this? */
+ /* If there's stuff to be cleaned up, clean it up. */
+ if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
+/*FIXME, does this have a bug at start address 0? */
+ && last_o_file_start
+ && objfile -> ei.entry_point < bufp->n_value
+ && objfile -> ei.entry_point >= last_o_file_start)
+ {
+ objfile -> ei.entry_file_lowpc = last_o_file_start;
+ objfile -> ei.entry_file_highpc = bufp->n_value;
+ }
+#endif
+
+ if (pst)
+ {
+ xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
+ ssymnum,
+ dependency_list, dependencies_used);
+ }
+
+ /* Record the toc offset value of this symbol table into ldinfo structure.
+ If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
+ this information would be file auxiliary header. */
+
+#ifndef FAKING_RS6000
+ xcoff_add_toc_to_loadinfo (toc_offset);
+#endif
}
+/* 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.
-/* aixcoff version of symbol file read. */
+ 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). */
-void
-aixcoff_symfile_read (sf, addr, mainline)
- struct sym_fns *sf;
- CORE_ADDR addr;
- int mainline;
+static void
+xcoff_initial_scan (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline; /* FIXME comments above */
{
- int num_symbols; /* # of symbols */
- int symtab_offset; /* symbol table and */
- int stringtab_offset; /* string table file offsets */
- int val;
bfd *abfd;
- struct coff_symfile_info *info = (void*) sf->sym_private;
+ 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;
- symfile_bfd = abfd = sf->objfile->obfd;
- name = sf->objfile->name;
+#ifndef FAKING_RS6000
+ /* Initialize load info structure. */
+ if (mainline)
+ xcoff_init_loadinfo ();
+#endif
+
+ 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 */
info->max_lineno_offset = 0;
bfd_map_over_sections (abfd, find_linenos, info);
- /* FIXME! This stuff should move into symfile_init */
- if (info->min_lineno_offset != 0
- && info->max_lineno_offset > info->min_lineno_offset) {
-
- /* only read in the line # table if one exists */
- val = init_lineno(abfd, info->min_lineno_offset,
- info->max_lineno_offset - info->min_lineno_offset);
-
- if (val < 0)
- error("\"%s\": error reading line numbers\n", name);
- }
+ if (num_symbols > 0)
+ {
+ /* Read the string table. */
+ init_stringtab (abfd, stringtab_offset, objfile);
- val = init_stringtab(abfd, stringtab_offset);
- if (val < 0) {
- error ("\"%s\": can't get string table", name);
- }
+ /* Read the .debug section, if present. */
+ {
+ sec_ptr secp;
+ bfd_size_type length;
+ char *debugsec = NULL;
- if (init_debugsection(abfd) < 0) {
- error ("Error reading .debug section of `%s'\n", name);
- }
+ 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;
+ }
+ }
- /* Position to read the symbol table. Do not read it all at once. */
- val = bfd_seek(abfd, (long)symtab_offset, 0);
+ /* 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, L_SET);
if (val < 0)
- perror_with_name(name);
-
- if (bfd_tell(abfd) != symtab_offset)
- fatal("bfd? BFD!");
+ 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");
- init_misc_bunches ();
- make_cleanup(discard_misc_bunches, 0);
+ /* 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);
-#ifdef XCOFF_INIT_LOADINFO
- if (mainline)
- XCOFF_INIT_LOADINFO ();
-#endif
+ pending_blocks = 0;
+ back_to = make_cleanup (really_free_pendings, 0);
- /* Now that the executable file is positioned at symbol table,
- process it and define symbols accordingly. */
+ init_minimal_symbol_collection ();
+ make_cleanup (discard_minimal_symbols, 0);
- read_xcoff_symtab(sf->objfile, num_symbols);
+ /* Now that the symbol table data of the executable file are all in core,
+ process them and define symbols accordingly. */
- make_cleanup(free_debugsection, 0);
+ scan_xcoff_symtab (section_offsets, objfile);
- /* Sort symbols alphabetically within each block. */
- sort_syms ();
+ /* Install any minimal symbols that have been collected as the current
+ minimal symbols for this objfile. */
- /* Go over the misc functions and install them in vector. */
- condense_misc_bunches (!mainline);
+ install_minimal_symbols (objfile);
- /* Make a default for file to list. */
- select_source_symtab (0);
+ do_cleanups (back_to);
+}
+\f
+static struct section_offsets *
+xcoff_symfile_offsets (objfile, addr)
+ struct objfile *objfile;
+ CORE_ADDR addr;
+{
+ struct section_offsets *section_offsets;
+ int i;
+
+ objfile->num_sections = SECT_OFF_MAX;
+ section_offsets = (struct section_offsets *)
+ obstack_alloc
+ (&objfile -> psymbol_obstack,
+ sizeof (struct section_offsets)
+ + sizeof (section_offsets->offsets) * objfile->num_sections);
+
+ /* 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 (section_offsets, i) = 0;
+
+ return section_offsets;
}
-/* Register our ability to parse symbols for aixcoff BFD files. */
+/* Register our ability to parse symbols for xcoff BFD files. */
-static struct sym_fns aixcoff_sym_fns =
+static struct sym_fns xcoff_sym_fns =
{
- "aixcoff-rs6000", 15,
- aixcoff_new_init, aixcoff_symfile_init,
- aixcoff_symfile_read,
+
+ /* 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(&aixcoff_sym_fns);
+ add_symtab_fns(&xcoff_sym_fns);
+
+ /* Initialize symbol template later used for arguments. Its other
+ fields are zero, or are filled in later. */
+ SYMBOL_NAME (&parmsym) = "";
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (&parmsym, language_c);
+ SYMBOL_NAMESPACE (&parmsym) = VAR_NAMESPACE;
+ SYMBOL_CLASS (&parmsym) = LOC_ARG;
+
+ 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);
}