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xcoffread.c
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/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
Copyright (C) 1986-2015 Free Software Foundation, Inc.
Derived from coffread.c, dbxread.c, and a lot of hacking.
Contributed by IBM Corporation.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "bfd.h"
#include <sys/types.h>
#include <fcntl.h>
#include <ctype.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <sys/stat.h>
#include "coff/internal.h"
#include "libcoff.h" /* FIXME, internal data from BFD */
#include "coff/xcoff.h"
#include "libxcoff.h"
#include "coff/rs6000.h"
#include "xcoffread.h"
#include "symtab.h"
#include "gdbtypes.h"
/* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
#include "symfile.h"
#include "objfiles.h"
#include "buildsym.h"
#include "stabsread.h"
#include "expression.h"
#include "complaints.h"
#include "psympriv.h"
#include "gdb-stabs.h"
/* For interface with stabsread.c. */
#include "aout/stab_gnu.h"
/* Key for XCOFF-associated data. */
static const struct objfile_data *xcoff_objfile_data_key;
/* We put a pointer to this structure in the read_symtab_private field
of the psymtab. */
struct symloc
{
/* First symbol number for this file. */
int first_symnum;
/* Number of symbols in the section of the symbol table devoted to
this file's symbols (actually, the section bracketed may contain
more than just this file's symbols). If numsyms is 0, the only
reason for this thing's existence is the dependency list. Nothing
else will happen when it is read in. */
int numsyms;
/* Position of the start of the line number information for this
psymtab. */
unsigned int lineno_off;
};
/* Remember what we deduced to be the source language of this psymtab. */
static enum language psymtab_language = language_unknown;
/* Simplified internal version of coff symbol table information. */
struct coff_symbol
{
char *c_name;
int c_symnum; /* Symbol number of this entry. */
int c_naux; /* 0 if syment only, 1 if syment + auxent. */
CORE_ADDR c_value;
unsigned char c_sclass;
int c_secnum;
unsigned int c_type;
};
/* Last function's saved coff symbol `cs'. */
static struct coff_symbol fcn_cs_saved;
static bfd *symfile_bfd;
/* Core address of start and end of text of current source file.
This is calculated from the first function seen after a C_FILE
symbol. */
static CORE_ADDR cur_src_end_addr;
/* Core address of the end of the first object file. */
static CORE_ADDR first_object_file_end;
/* Initial symbol-table-debug-string vector length. */
#define INITIAL_STABVECTOR_LENGTH 40
/* Size of a COFF symbol. I think it is always 18, so I'm not sure
there is any reason not to just use a #define, but might as well
ask BFD for the size and store it here, I guess. */
static unsigned local_symesz;
struct coff_symfile_info
{
file_ptr min_lineno_offset; /* Where in file lowest line#s are. */
file_ptr max_lineno_offset; /* 1+last byte of line#s in file. */
/* Pointer to the string table. */
char *strtbl;
/* Pointer to debug section. */
char *debugsec;
/* Pointer to the a.out symbol table. */
char *symtbl;
/* Number of symbols in symtbl. */
int symtbl_num_syms;
/* Offset in data section to TOC anchor. */
CORE_ADDR toc_offset;
};
/* Convenience macro to access the per-objfile XCOFF data. */
#define XCOFF_DATA(objfile) \
((struct coff_symfile_info *) objfile_data ((objfile), \
xcoff_objfile_data_key))
/* XCOFF names for dwarf sections. There is no compressed sections. */
static const struct dwarf2_debug_sections dwarf2_xcoff_names = {
{ ".dwinfo", NULL },
{ ".dwabrev", NULL },
{ ".dwline", NULL },
{ ".dwloc", NULL },
{ NULL, NULL }, /* debug_macinfo */
{ NULL, NULL }, /* debug_macro */
{ ".dwstr", NULL },
{ ".dwrnges", NULL },
{ NULL, NULL }, /* debug_types */
{ NULL, NULL }, /* debug_addr */
{ ".dwframe", NULL },
{ NULL, NULL }, /* eh_frame */
{ NULL, NULL }, /* gdb_index */
23
};
static void
bf_notfound_complaint (void)
{
complaint (&symfile_complaints,
_("line numbers off, `.bf' symbol not found"));
}
static void
ef_complaint (int arg1)
{
complaint (&symfile_complaints,
_("Mismatched .ef symbol ignored starting at symnum %d"), arg1);
}
static void
eb_complaint (int arg1)
{
complaint (&symfile_complaints,
_("Mismatched .eb symbol ignored starting at symnum %d"), arg1);
}
static void xcoff_initial_scan (struct objfile *, int);
static void scan_xcoff_symtab (struct objfile *);
static char *xcoff_next_symbol_text (struct objfile *);
static void record_include_begin (struct coff_symbol *);
static void
enter_line_range (struct subfile *, unsigned, unsigned,
CORE_ADDR, CORE_ADDR, unsigned *);
static void init_stringtab (bfd *, file_ptr, struct objfile *);
static void xcoff_symfile_init (struct objfile *);
static void xcoff_new_init (struct objfile *);
static void xcoff_symfile_finish (struct objfile *);
static char *coff_getfilename (union internal_auxent *, struct objfile *);
static void read_symbol (struct internal_syment *, int);
static int read_symbol_lineno (int);
static CORE_ADDR read_symbol_nvalue (int);
static struct symbol *process_xcoff_symbol (struct coff_symbol *,
struct objfile *);
static void read_xcoff_symtab (struct objfile *, struct partial_symtab *);
#if 0
static void add_stab_to_list (char *, struct pending_stabs **);
#endif
static int compare_lte (const void *, const void *);
static struct linetable *arrange_linetable (struct linetable *);
static void record_include_end (struct coff_symbol *);
static void process_linenos (CORE_ADDR, CORE_ADDR);
/* Translate from a COFF section number (target_index) to a SECT_OFF_*
code. */
static int secnum_to_section (int, struct objfile *);
static asection *secnum_to_bfd_section (int, struct objfile *);
struct find_targ_sec_arg
{
int targ_index;
int *resultp;
asection **bfd_sect;
struct objfile *objfile;
};
static void find_targ_sec (bfd *, asection *, void *);
static void
find_targ_sec (bfd *abfd, asection *sect, void *obj)
{
struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
struct objfile *objfile = args->objfile;
if (sect->target_index == args->targ_index)
{
/* This is the section. Figure out what SECT_OFF_* code it is. */
if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
*args->resultp = SECT_OFF_TEXT (objfile);
else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
*args->resultp = SECT_OFF_DATA (objfile);
else
*args->resultp = gdb_bfd_section_index (abfd, sect);
*args->bfd_sect = sect;
}
}
/* Search all BFD sections for the section whose target_index is
equal to N_SCNUM. Set *BFD_SECT to that section. The section's
associated index in the objfile's section_offset table is also
stored in *SECNUM.
If no match is found, *BFD_SECT is set to NULL, and *SECNUM
is set to the text section's number. */
static void
xcoff_secnum_to_sections (int n_scnum, struct objfile *objfile,
asection **bfd_sect, int *secnum)
{
struct find_targ_sec_arg args;
args.targ_index = n_scnum;
args.resultp = secnum;
args.bfd_sect = bfd_sect;
args.objfile = objfile;
*bfd_sect = NULL;
*secnum = SECT_OFF_TEXT (objfile);
bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
}
/* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
static int
secnum_to_section (int n_scnum, struct objfile *objfile)
{
int secnum;
asection *ignored;
xcoff_secnum_to_sections (n_scnum, objfile, &ignored, &secnum);
return secnum;
}
/* Return the BFD section that N_SCNUM points to. */
static asection *
secnum_to_bfd_section (int n_scnum, struct objfile *objfile)
{
int ignored;
asection *bfd_sect;
xcoff_secnum_to_sections (n_scnum, objfile, &bfd_sect, &ignored);
return bfd_sect;
}
/* add a given stab string into given stab vector. */
#if 0
static void
add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
{
if (*stabvector == NULL)
{
*stabvector = (struct pending_stabs *)
xmalloc (sizeof (struct pending_stabs) +
INITIAL_STABVECTOR_LENGTH * sizeof (char *));
(*stabvector)->count = 0;
(*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
}
else if ((*stabvector)->count >= (*stabvector)->length)
{
(*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
*stabvector = (struct pending_stabs *)
xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
(*stabvector)->length * sizeof (char *));
}
(*stabvector)->stab[(*stabvector)->count++] = stabname;
}
#endif
/* *INDENT-OFF* */
/* Linenos are processed on a file-by-file basis.
Two reasons:
1) xlc (IBM's native c compiler) postpones static function code
emission to the end of a compilation unit. This way it can
determine if those functions (statics) are needed or not, and
can do some garbage collection (I think). This makes line
numbers and corresponding addresses unordered, and we end up
with a line table like:
lineno addr
foo() 10 0x100
20 0x200
30 0x300
foo3() 70 0x400
80 0x500
90 0x600
static foo2()
40 0x700
50 0x800
60 0x900
and that breaks gdb's binary search on line numbers, if the
above table is not sorted on line numbers. And that sort
should be on function based, since gcc can emit line numbers
like:
10 0x100 - for the init/test part of a for stmt.
20 0x200
30 0x300
10 0x400 - for the increment part of a for stmt.
arrange_linetable() will do this sorting.
2) aix symbol table might look like:
c_file // beginning of a new file
.bi // beginning of include file
.ei // end of include file
.bi
.ei
basically, .bi/.ei pairs do not necessarily encapsulate
their scope. They need to be recorded, and processed later
on when we come the end of the compilation unit.
Include table (inclTable) and process_linenos() handle
that. */
/* *INDENT-ON* */
/* compare line table entry addresses. */
static int
compare_lte (const void *lte1p, const void *lte2p)
{
struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
return lte1->pc - lte2->pc;
}
/* Given a line table with function entries are marked, arrange its
functions in ascending order and strip off function entry markers
and return it in a newly created table. If the old one is good
enough, return the old one. */
/* FIXME: I think all this stuff can be replaced by just passing
sort_linevec = 1 to end_symtab. */
static struct linetable *
arrange_linetable (struct linetable *oldLineTb)
{
int ii, jj, newline, /* new line count */
function_count; /* # of functions */
struct linetable_entry *fentry; /* function entry vector */
int fentry_size; /* # of function entries */
struct linetable *newLineTb; /* new line table */
int extra_lines = 0;
#define NUM_OF_FUNCTIONS 20
fentry_size = NUM_OF_FUNCTIONS;
fentry = XNEWVEC (struct linetable_entry, fentry_size);
for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
{
if (oldLineTb->item[ii].line == 0)
{ /* Function entry found. */
if (function_count >= fentry_size)
{ /* Make sure you have room. */
fentry_size *= 2;
fentry = (struct linetable_entry *)
xrealloc (fentry,
fentry_size * sizeof (struct linetable_entry));
}
fentry[function_count].line = ii;
fentry[function_count].pc = oldLineTb->item[ii].pc;
++function_count;
/* If the function was compiled with XLC, we may have to add an
extra line entry later. Reserve space for that. */
if (ii + 1 < oldLineTb->nitems
&& oldLineTb->item[ii].pc != oldLineTb->item[ii + 1].pc)
extra_lines++;
}
}
if (function_count == 0)
{
xfree (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 + extra_lines) * 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)
{
/* If the function was compiled with XLC, we may have to add an
extra line to cover the function prologue. */
jj = fentry[ii].line;
if (jj + 1 < oldLineTb->nitems
&& oldLineTb->item[jj].pc != oldLineTb->item[jj + 1].pc)
{
newLineTb->item[newline] = oldLineTb->item[jj];
newLineTb->item[newline].line = oldLineTb->item[jj + 1].line;
newline++;
}
for (jj = fentry[ii].line + 1;
jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
++jj, ++newline)
newLineTb->item[newline] = oldLineTb->item[jj];
}
xfree (fentry);
/* The number of items in the line table must include these
extra lines which were added in case of XLC compiled functions. */
newLineTb->nitems = oldLineTb->nitems - function_count + extra_lines;
return newLineTb;
}
/* include file support: C_BINCL/C_EINCL pairs will be kept in the
following `IncludeChain'. At the end of each symtab (end_symtab),
we will determine if we should create additional symtab's to
represent if (the include files. */
typedef struct _inclTable
{
char *name; /* include filename */
/* Offsets to the line table. end points to the last entry which is
part of this include file. */
int begin, end;
struct subfile *subfile;
unsigned funStartLine; /* Start line # of its function. */
}
InclTable;
#define INITIAL_INCLUDE_TABLE_LENGTH 20
static InclTable *inclTable; /* global include table */
static int inclIndx; /* last entry to table */
static int inclLength; /* table length */
static int inclDepth; /* nested include depth */
static void allocate_include_entry (void);
static void
record_include_begin (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. */
complaint (&symfile_complaints, _("Nested C_BINCL symbols"));
}
++inclDepth;
allocate_include_entry ();
inclTable[inclIndx].name = cs->c_name;
inclTable[inclIndx].begin = cs->c_value;
}
static void
record_include_end (struct coff_symbol *cs)
{
InclTable *pTbl;
if (inclDepth == 0)
{
complaint (&symfile_complaints, _("Mismatched C_BINCL/C_EINCL pair"));
}
allocate_include_entry ();
pTbl = &inclTable[inclIndx];
pTbl->end = cs->c_value;
--inclDepth;
++inclIndx;
}
static void
allocate_include_entry (void)
{
if (inclTable == NULL)
{
inclTable = XCNEWVEC (InclTable, INITIAL_INCLUDE_TABLE_LENGTH);
inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
inclIndx = 0;
}
else if (inclIndx >= inclLength)
{
inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
inclTable = XRESIZEVEC (InclTable, inclTable, inclLength);
memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
'\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
}
}
/* Global variable to pass the psymtab down to all the routines involved
in psymtab to symtab processing. */
static struct partial_symtab *this_symtab_psymtab;
/* Objfile related to this_symtab_psymtab; set at the same time. */
static struct objfile *this_symtab_objfile;
/* given the start and end addresses of a compilation unit (or a csect,
at times) process its lines and create appropriate line vectors. */
static void
process_linenos (CORE_ADDR start, CORE_ADDR end)
{
int offset, ii;
file_ptr max_offset
= XCOFF_DATA (this_symtab_objfile)->max_lineno_offset;
/* subfile structure for the main compilation unit. */
struct subfile main_subfile;
/* In the main source file, any time we see a function entry, we
reset this variable to function's absolute starting line number.
All the following line numbers in the function are relative to
this, and we record absolute line numbers in record_line(). */
unsigned int main_source_baseline = 0;
unsigned *firstLine;
offset =
((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
if (offset == 0)
goto return_after_cleanup;
memset (&main_subfile, '\0', sizeof (main_subfile));
if (inclIndx == 0)
/* All source lines were in the main source file. None in include
files. */
enter_line_range (&main_subfile, offset, 0, start, end,
&main_source_baseline);
else
{
/* There was source with line numbers in include files. */
int linesz =
coff_data (this_symtab_objfile->obfd)->local_linesz;
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);
}
if (strcmp (inclTable[ii].name, get_last_source_file ()) == 0)
{
/* The entry in the include table refers to the main source
file. Add the lines to the main subfile. */
main_source_baseline = inclTable[ii].funStartLine;
enter_line_range
(&main_subfile, inclTable[ii].begin, inclTable[ii].end,
start, 0, &main_source_baseline);
inclTable[ii].subfile = &main_subfile;
}
else
{
/* Have a new subfile for the include file. */
tmpSubfile = inclTable[ii].subfile = XNEW (struct subfile);
memset (tmpSubfile, '\0', sizeof (struct subfile));
firstLine = &(inclTable[ii].funStartLine);
/* Enter include file's lines now. */
enter_line_range (tmpSubfile, inclTable[ii].begin,
inclTable[ii].end, start, 0, firstLine);
}
if (offset <= inclTable[ii].end)
offset = inclTable[ii].end + linesz;
}
/* All the include files' line have been processed at this point. Now,
enter remaining lines of the main file, if any left. */
if (offset < max_offset + 1 - linesz)
{
enter_line_range (&main_subfile, offset, 0, start, end,
&main_source_baseline);
}
}
/* Process main file's line numbers. */
if (main_subfile.line_vector)
{
struct linetable *lineTb, *lv;
lv = main_subfile.line_vector;
/* Line numbers are not necessarily ordered. xlc compilation will
put static function to the end. */
lineTb = arrange_linetable (lv);
if (lv == lineTb)
{
current_subfile->line_vector = (struct linetable *)
xrealloc (lv, (sizeof (struct linetable)
+ lv->nitems * sizeof (struct linetable_entry)));
}
else
{
xfree (lv);
current_subfile->line_vector = lineTb;
}
current_subfile->line_vector_length =
current_subfile->line_vector->nitems;
}
/* Now, process included files' line numbers. */
for (ii = 0; ii < inclIndx; ++ii)
{
if (inclTable[ii].subfile != ((struct subfile *) &main_subfile)
&& (inclTable[ii].subfile)->line_vector) /* Useless if!!!
FIXMEmgo */
{
struct linetable *lineTb, *lv;
lv = (inclTable[ii].subfile)->line_vector;
/* Line numbers are not necessarily ordered. xlc compilation will
put static function to the end. */
lineTb = arrange_linetable (lv);
push_subfile ();
/* For the same include file, we might want to have more than one
subfile. This happens if we have something like:
......
#include "foo.h"
......
#include "foo.h"
......
while foo.h including code in it. (stupid but possible)
Since start_subfile() looks at the name and uses an
existing one if finds, we need to provide a fake name and
fool it. */
#if 0
start_subfile (inclTable[ii].name);
#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);
xfree (current_subfile->name);
}
current_subfile->name = xstrdup (inclTable[ii].name);
#endif
if (lv == lineTb)
{
current_subfile->line_vector =
(struct linetable *) xrealloc
(lv, (sizeof (struct linetable)
+ lv->nitems * sizeof (struct linetable_entry)));
}
else
{
xfree (lv);
current_subfile->line_vector = lineTb;
}
current_subfile->line_vector_length =
current_subfile->line_vector->nitems;
start_subfile (pop_subfile ());
}
}
return_after_cleanup:
/* We don't want to keep alloc/free'ing the global include file table. */
inclIndx = 0;
}
static void
aix_process_linenos (struct objfile *objfile)
{
/* There is no linenos to read if there are only dwarf info. */
if (this_symtab_psymtab == NULL)
return;
/* Process line numbers and enter them into line vector. */
process_linenos (last_source_start_addr, cur_src_end_addr);
}
/* Enter a given range of lines into the line vector.
can be called in the following two ways:
enter_line_range (subfile, beginoffset, endoffset,
startaddr, 0, firstLine) or
enter_line_range (subfile, beginoffset, 0,
startaddr, endaddr, firstLine)
endoffset points to the last line table entry that we should pay
attention to. */
static void
enter_line_range (struct subfile *subfile, unsigned beginoffset,
unsigned endoffset, /* offsets to line table */
CORE_ADDR startaddr, /* offsets to line table */
CORE_ADDR endaddr, unsigned *firstLine)
{
struct objfile *objfile = this_symtab_objfile;
struct gdbarch *gdbarch = get_objfile_arch (objfile);
unsigned int curoffset;
CORE_ADDR addr;
void *ext_lnno;
struct internal_lineno int_lnno;
unsigned int limit_offset;
bfd *abfd;
int linesz;
if (endoffset == 0 && startaddr == 0 && endaddr == 0)
return;
curoffset = beginoffset;
limit_offset = XCOFF_DATA (objfile)->max_lineno_offset;
if (endoffset != 0)
{
if (endoffset >= limit_offset)
{
complaint (&symfile_complaints,
_("Bad line table offset in C_EINCL directive"));
return;
}
limit_offset = endoffset;
}
else
limit_offset -= 1;
abfd = objfile->obfd;
linesz = coff_data (abfd)->local_linesz;
ext_lnno = alloca (linesz);
while (curoffset <= limit_offset)
{
bfd_seek (abfd, curoffset, SEEK_SET);
bfd_bread (ext_lnno, linesz, 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 (objfile->section_offsets, SECT_OFF_TEXT (objfile));
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, gdbarch_addr_bits_remove (gdbarch, addr));
--(*firstLine);
}
else
record_line (subfile, *firstLine + int_lnno.l_lnno,
gdbarch_addr_bits_remove (gdbarch, addr));
curoffset += linesz;
}
}
/* Save the vital information for use when closing off the current file.
NAME is the file name the symbols came from, START_ADDR is the first
text address for the file, and SIZE is the number of bytes of text. */
#define complete_symtab(name, start_addr) { \
set_last_source_file (name); \
last_source_start_addr = start_addr; \
}
/* Refill the symbol table input buffer
and set the variables that control fetching entries from it.
Reports an error if no data available.
This function can read past the end of the symbol table
(into the string table) but this does no harm. */
/* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
Creation of all new minimal symbols should go through this function
rather than calling the various prim_record_[...] functions in order
to make sure that all symbol addresses get properly relocated.
Arguments are:
NAME - the symbol's name (but if NAME starts with a period, that
leading period is discarded).
ADDRESS - the symbol's address, prior to relocation. This function
relocates the address before recording the minimal symbol.
MS_TYPE - the symbol's type.
N_SCNUM - the symbol's XCOFF section number.
OBJFILE - the objfile associated with the minimal symbol. */
static void
record_minimal_symbol (const char *name, CORE_ADDR address,
enum minimal_symbol_type ms_type,
int n_scnum,
struct objfile *objfile)
{
int section = secnum_to_section (n_scnum, objfile);
if (name[0] == '.')
++name;
prim_record_minimal_symbol_and_info (name, address, ms_type,
secnum_to_section (n_scnum, objfile),
objfile);
}
/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
nested. At any given time, a symbol can only be in one static block.
This is the base address of current static block, zero if non exists. */
static int static_block_base = 0;
/* Section number for the current static block. */
static int static_block_section = -1;
/* true if space for symbol name has been allocated. */
static int symname_alloced = 0;
/* Next symbol to read. Pointer into raw seething symbol table. */
static char *raw_symbol;
/* This is the function which stabsread.c calls to get symbol
continuations. */
static char *
xcoff_next_symbol_text (struct objfile *objfile)
{
struct internal_syment symbol;
char *retval;
/* FIXME: is this the same as the passed arg? */
if (this_symtab_objfile)
objfile = this_symtab_objfile;
bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
if (symbol.n_zeroes)
{
complaint (&symfile_complaints, _("Unexpected symbol continuation"));
/* Return something which points to '\0' and hope the symbol reading
code does something reasonable. */
retval = "";
}
else if (symbol.n_sclass & 0x80)
{
retval = XCOFF_DATA (objfile)->debugsec + symbol.n_offset;
raw_symbol += coff_data (objfile->obfd)->local_symesz;
++symnum;
}
else
{
complaint (&symfile_complaints, _("Unexpected symbol continuation"));
/* Return something which points to '\0' and hope the symbol reading
code does something reasonable. */
retval = "";
}
return retval;
}
/* Read symbols for a given partial symbol table. */
static void
read_xcoff_symtab (struct objfile *objfile, struct partial_symtab *pst)