/* Generic stabs parsing for gas.
- Copyright (C) 1989, 1990, 1991, 1993 Free Software Foundation, Inc.
+ Copyright 1989, 1990, 1991, 1993, 1995, 1996, 1997, 1998, 2000, 2001
+ 2002, 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
-This file is part of GAS, the GNU Assembler.
+ This file is part of GAS, the GNU Assembler.
-GAS is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as
-published by the Free Software Foundation; either version 2,
-or (at your option) any later version.
+ GAS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 3,
+ or (at your option) any later version.
-GAS 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.
+ GAS 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 GAS; see the file COPYING. If not, write
-to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#include "as.h"
+#include "filenames.h"
#include "obstack.h"
#include "subsegs.h"
+#include "ecoff.h"
/* We need this, despite the apparent object format dependency, since
- it defines stab types, which all object formats can use now. */
+ it defines stab types, which all object formats can use now. */
#include "aout/stab_gnu.h"
+/* Holds whether the assembler is generating stabs line debugging
+ information or not. Potentially used by md_cleanup function. */
+
+int outputting_stabs_line_debug = 0;
+
+static void s_stab_generic (int, char *, char *);
+static void generate_asm_file (int, char *);
+
/* Allow backends to override the names used for the stab sections. */
#ifndef STAB_SECTION_NAME
#define STAB_SECTION_NAME ".stab"
#define STAB_STRING_SECTION_NAME ".stabstr"
#endif
+/* Non-zero if we're in the middle of a .func function, in which case
+ stabs_generate_asm_lineno emits function relative line number stabs.
+ Otherwise it emits line number stabs with absolute addresses. Note that
+ both cases only apply to assembler code assembled with -gstabs. */
+static int in_dot_func_p;
+
+/* Label at start of current function if in_dot_func_p != 0. */
+static const char *current_function_label;
+
/*
* Handle .stabX directives, which used to be open-coded.
* So much creeping featurism overloaded the semantics that we decided
#endif
unsigned int
-get_stab_string_offset (string, stabstr_secname)
- const char *string;
- const char *stabstr_secname;
+get_stab_string_offset (const char *string, const char *stabstr_secname)
{
unsigned int length;
unsigned int retval;
+ segT save_seg;
+ subsegT save_subseg;
+ segT seg;
+ char *p;
if (! SEPARATE_STAB_SECTIONS)
abort ();
- retval = 0;
length = strlen (string);
- if (length > 0)
- { /* Ordinary case. */
- segT save_seg;
- subsegT save_subseg;
- char *newsecname;
- segT seg;
- char *p;
- save_seg = now_seg;
- save_subseg = now_subseg;
+ save_seg = now_seg;
+ save_subseg = now_subseg;
- /* Create the stab string section. */
- newsecname = xmalloc ((unsigned long) (strlen (stabstr_secname) + 1));
- strcpy (newsecname, stabstr_secname);
+ /* Create the stab string section. */
+ seg = subseg_new (stabstr_secname, 0);
- seg = subseg_new (newsecname, 0);
-
- retval = seg_info (seg)->stabu.stab_string_size;
- if (retval > 0)
- free (newsecname);
- else
- {
- /* Make sure the first string is empty. */
- p = frag_more (1);
- *p = 0;
- retval = seg_info (seg)->stabu.stab_string_size = 1;
-#ifdef BFD_ASSEMBLER
- bfd_set_section_flags (stdoutput, seg, SEC_READONLY | SEC_DEBUGGING);
-#else
- free (newsecname);
-#endif
- }
+ retval = seg_info (seg)->stabu.stab_string_size;
+ if (retval <= 0)
+ {
+ /* Make sure the first string is empty. */
+ p = frag_more (1);
+ *p = 0;
+ retval = seg_info (seg)->stabu.stab_string_size = 1;
+ bfd_set_section_flags (stdoutput, seg, SEC_READONLY | SEC_DEBUGGING);
+ if (seg->name == stabstr_secname)
+ seg->name = xstrdup (stabstr_secname);
+ }
+ if (length > 0)
+ { /* Ordinary case. */
p = frag_more (length + 1);
strcpy (p, string);
seg_info (seg)->stabu.stab_string_size += length + 1;
-
- subseg_set (save_seg, save_subseg);
}
+ else
+ retval = 0;
+
+ subseg_set (save_seg, save_subseg);
return retval;
}
#define OBJ_PROCESS_STAB(SEG,W,S,T,O,D) aout_process_stab(W,S,T,O,D)
#endif
-static void
+/* Here instead of obj-aout.c because other formats use it too. */
+void
aout_process_stab (what, string, type, other, desc)
int what;
const char *string;
ends in "\" and the debug info is continued in the next .stabs
directive) from being separated by other random symbols. */
symbol = symbol_create (string, undefined_section, 0,
- (struct frag *) NULL);
+ &zero_address_frag);
if (what == 's' || what == 'n')
{
/* Pick up the value from the input line. */
- symbol->sy_frag = &zero_address_frag;
pseudo_set (symbol);
}
else
{
/* .stabd sets the name to NULL. Why? */
S_SET_NAME (symbol, NULL);
- symbol->sy_frag = frag_now;
+ symbol_set_frag (symbol, frag_now);
S_SET_VALUE (symbol, (valueT) frag_now_fix ());
}
symbol_append (symbol, symbol_lastP, &symbol_rootP, &symbol_lastP);
+ symbol_get_bfdsym (symbol)->flags |= BSF_DEBUGGING;
+
S_SET_TYPE (symbol, type);
S_SET_OTHER (symbol, other);
S_SET_DESC (symbol, desc);
#endif
/* This can handle different kinds of stabs (s,n,d) and different
- kinds of stab sections. */
+ kinds of stab sections. */
-static void
-s_stab_generic (what, stab_secname, stabstr_secname)
- int what;
- char *stab_secname;
- char *stabstr_secname;
+static void
+s_stab_generic (int what, char *stab_secname, char *stabstr_secname)
{
long longint;
- char *string;
+ char *string, *saved_string_obstack_end;
int type;
int other;
int desc;
'd' indicating which type of .stab this is. */
if (what != 's')
- string = "";
+ {
+ string = "";
+ saved_string_obstack_end = 0;
+ }
else
{
int length;
string = demand_copy_C_string (&length);
+ /* FIXME: We should probably find some other temporary storage
+ for string, rather than leaking memory if someone else
+ happens to use the notes obstack. */
+ saved_string_obstack_end = notes.next_free;
SKIP_WHITESPACE ();
if (*input_line_pointer == ',')
input_line_pointer++;
else
{
- as_warn (".stabs: Missing comma");
+ as_warn (_(".stab%c: missing comma"), what);
ignore_rest_of_line ();
return;
}
if (get_absolute_expression_and_terminator (&longint) != ',')
{
- as_warn (".stab%c: Missing comma", what);
+ as_warn (_(".stab%c: missing comma"), what);
ignore_rest_of_line ();
return;
}
if (get_absolute_expression_and_terminator (&longint) != ',')
{
- as_warn (".stab%c: Missing comma", what);
+ as_warn (_(".stab%c: missing comma"), what);
ignore_rest_of_line ();
return;
}
other = longint;
desc = get_absolute_expression ();
+
+ if ((desc > 0xffff) || (desc < -0x8000))
+ /* This could happen for example with a source file with a huge
+ number of lines. The only cure is to use a different debug
+ format, probably DWARF. */
+ as_warn (_(".stab%c: description field '%x' too big, try a different debug format"),
+ what, desc);
+
if (what == 's' || what == 'n')
{
if (*input_line_pointer != ',')
{
- as_warn (".stab%c: Missing comma", what);
+ as_warn (_(".stab%c: missing comma"), what);
ignore_rest_of_line ();
return;
}
SKIP_WHITESPACE ();
}
+#ifdef TC_PPC
+#ifdef OBJ_ELF
+ /* Solaris on PowerPC has decided that .stabd can take 4 arguments, so if we were
+ given 4 arguments, make it a .stabn */
+ else if (what == 'd')
+ {
+ char *save_location = input_line_pointer;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == ',')
+ {
+ input_line_pointer++;
+ what = 'n';
+ }
+ else
+ input_line_pointer = save_location;
+ }
+#endif /* OBJ_ELF */
+#endif /* TC_PPC */
+
+#ifndef NO_LISTING
+ if (listing)
+ {
+ switch (type)
+ {
+ case N_SLINE:
+ listing_source_line ((unsigned int) desc);
+ break;
+ case N_SO:
+ case N_SOL:
+ listing_source_file (string);
+ break;
+ }
+ }
+#endif /* ! NO_LISTING */
+
/* We have now gathered the type, other, and desc information. For
.stabs or .stabn, input_line_pointer is now pointing at the
value. */
unsigned int stroff;
char *p;
+ static segT cached_sec;
+ static char *cached_secname;
+
dot = frag_now_fix ();
- seg = subseg_new (stab_secname, 0);
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ if (cached_secname && !strcmp (cached_secname, stab_secname))
+ {
+ seg = cached_sec;
+ subseg_set (seg, 0);
+ }
+ else
+ {
+ seg = subseg_new (stab_secname, 0);
+ if (cached_secname)
+ free (cached_secname);
+ cached_secname = xstrdup (stab_secname);
+ cached_sec = seg;
+ }
if (! seg_info (seg)->hadone)
{
-#ifdef BFD_ASSEMBLER
bfd_set_section_flags (stdoutput, seg,
SEC_READONLY | SEC_RELOC | SEC_DEBUGGING);
-#endif
#ifdef INIT_STAB_SECTION
INIT_STAB_SECTION (seg);
#endif
}
stroff = get_stab_string_offset (string, stabstr_secname);
+ if (what == 's')
+ {
+ /* Release the string, if nobody else has used the obstack. */
+ if (saved_string_obstack_end == notes.next_free)
+ obstack_free (¬es, string);
+ }
/* At least for now, stabs in a special stab section are always
output as 12 byte blocks of information. */
}
else
{
- const char *fake;
symbolS *symbol;
expressionS exp;
/* Arrange for a value representing the current location. */
- fake = FAKE_LABEL_NAME;
- symbol = symbol_new (fake, saved_seg, dot, saved_frag);
+ symbol = symbol_temp_new (saved_seg, dot, saved_frag);
exp.X_op = O_symbol;
exp.X_add_symbol = symbol;
}
#ifdef OBJ_PROCESS_STAB
- OBJ_PROCESS_STAB (seg, what, string + stroff, type, other, desc);
+ OBJ_PROCESS_STAB (seg, what, string, type, other, desc);
#endif
subseg_set (saved_seg, saved_subseg);
#endif
}
-#ifndef NO_LISTING
- if (listing)
- {
- switch (type)
- {
- case N_SLINE:
- listing_source_line ((unsigned int) desc);
- break;
- case N_SO:
- case N_SOL:
- listing_source_file (string);
- break;
- }
- }
-#endif /* ! NO_LISTING */
-
demand_empty_rest_of_line ();
}
-/* Regular stab directive. */
+/* Regular stab directive. */
void
-s_stab (what)
- int what;
+s_stab (int what)
{
s_stab_generic (what, STAB_SECTION_NAME, STAB_STRING_SECTION_NAME);
}
-/* "Extended stabs", used in Solaris only now. */
+/* "Extended stabs", used in Solaris only now. */
void
-s_xstab (what)
- int what;
+s_xstab (int what)
{
int length;
char *stab_secname, *stabstr_secname;
+ static char *saved_secname, *saved_strsecname;
+ /* @@ MEMORY LEAK: This allocates a copy of the string, but in most
+ cases it will be the same string, so we could release the storage
+ back to the obstack it came from. */
stab_secname = demand_copy_C_string (&length);
SKIP_WHITESPACE ();
if (*input_line_pointer == ',')
input_line_pointer++;
else
{
- as_bad ("comma missing in .xstabs");
+ as_bad (_("comma missing in .xstabs"));
ignore_rest_of_line ();
return;
}
/* To get the name of the stab string section, simply add "str" to
the stab section name. */
- stabstr_secname = (char *) xmalloc (strlen (stab_secname) + 4);
- strcpy (stabstr_secname, stab_secname);
- strcat (stabstr_secname, "str");
- s_stab_generic (what, stab_secname, stabstr_secname);
- free (stabstr_secname);
+ if (saved_secname == 0 || strcmp (saved_secname, stab_secname))
+ {
+ stabstr_secname = (char *) xmalloc (strlen (stab_secname) + 4);
+ strcpy (stabstr_secname, stab_secname);
+ strcat (stabstr_secname, "str");
+ if (saved_secname)
+ {
+ free (saved_secname);
+ free (saved_strsecname);
+ }
+ saved_secname = stab_secname;
+ saved_strsecname = stabstr_secname;
+ }
+ s_stab_generic (what, saved_secname, saved_strsecname);
}
#ifdef S_SET_DESC
/* Frob invented at RMS' request. Set the n_desc of a symbol. */
-void
+void
s_desc (ignore)
- int ignore;
+ int ignore ATTRIBUTE_UNUSED;
{
char *name;
char c;
if (*input_line_pointer != ',')
{
*p = 0;
- as_bad ("Expected comma after name \"%s\"", name);
+ as_bad (_("expected comma after \"%s\""), name);
*p = c;
ignore_rest_of_line ();
}
} /* s_desc() */
#endif /* defined (S_SET_DESC) */
+
+/* Generate stabs debugging information to denote the main source file. */
+
+void
+stabs_generate_asm_file (void)
+{
+ char *file;
+ unsigned int lineno;
+
+ as_where (&file, &lineno);
+ if (use_gnu_debug_info_extensions)
+ {
+ const char *dir;
+ char *dir2;
+
+ dir = remap_debug_filename (getpwd ());
+ dir2 = (char *) alloca (strlen (dir) + 2);
+ sprintf (dir2, "%s%s", dir, "/");
+ generate_asm_file (N_SO, dir2);
+ xfree ((char *) dir);
+ }
+ generate_asm_file (N_SO, file);
+}
+
+/* Generate stabs debugging information to denote the source file.
+ TYPE is one of N_SO, N_SOL. */
+
+static void
+generate_asm_file (int type, char *file)
+{
+ static char *last_file;
+ static int label_count;
+ char *hold;
+ char sym[30];
+ char *buf;
+ char *tmp = file;
+ char *file_endp = file + strlen (file);
+ char *bufp;
+
+ if (last_file != NULL
+ && filename_cmp (last_file, file) == 0)
+ return;
+
+ /* Rather than try to do this in some efficient fashion, we just
+ generate a string and then parse it again. That lets us use the
+ existing stabs hook, which expect to see a string, rather than
+ inventing new ones. */
+ hold = input_line_pointer;
+
+ sprintf (sym, "%sF%d", FAKE_LABEL_NAME, label_count);
+ ++label_count;
+
+ /* Allocate enough space for the file name (possibly extended with
+ doubled up backslashes), the symbol name, and the other characters
+ that make up a stabs file directive. */
+ bufp = buf = (char *) xmalloc (2 * strlen (file) + strlen (sym) + 12);
+
+ *bufp++ = '"';
+
+ while (tmp < file_endp)
+ {
+ char *bslash = strchr (tmp, '\\');
+ size_t len = (bslash) ? (size_t) (bslash - tmp + 1) : strlen (tmp);
+
+ /* Double all backslashes, since demand_copy_C_string (used by
+ s_stab to extract the part in quotes) will try to replace them as
+ escape sequences. backslash may appear in a filespec. */
+ strncpy (bufp, tmp, len);
+
+ tmp += len;
+ bufp += len;
+
+ if (bslash != NULL)
+ *bufp++ = '\\';
+ }
+
+ sprintf (bufp, "\",%d,0,0,%s\n", type, sym);
+
+ input_line_pointer = buf;
+ s_stab ('s');
+ colon (sym);
+
+ if (last_file != NULL)
+ free (last_file);
+ last_file = xstrdup (file);
+
+ free (buf);
+
+ input_line_pointer = hold;
+}
+
+/* Generate stabs debugging information for the current line. This is
+ used to produce debugging information for an assembler file. */
+
+void
+stabs_generate_asm_lineno (void)
+{
+ static int label_count;
+ char *hold;
+ char *file;
+ unsigned int lineno;
+ char *buf;
+ char sym[30];
+ /* Remember the last file/line and avoid duplicates. */
+ static unsigned int prev_lineno = -1;
+ static char *prev_file = NULL;
+
+ /* Rather than try to do this in some efficient fashion, we just
+ generate a string and then parse it again. That lets us use the
+ existing stabs hook, which expect to see a string, rather than
+ inventing new ones. */
+
+ hold = input_line_pointer;
+
+ as_where (&file, &lineno);
+
+ /* Don't emit sequences of stabs for the same line. */
+ if (prev_file == NULL)
+ {
+ /* First time thru. */
+ prev_file = xstrdup (file);
+ prev_lineno = lineno;
+ }
+ else if (lineno == prev_lineno
+ && filename_cmp (file, prev_file) == 0)
+ {
+ /* Same file/line as last time. */
+ return;
+ }
+ else
+ {
+ /* Remember file/line for next time. */
+ prev_lineno = lineno;
+ if (filename_cmp (file, prev_file) != 0)
+ {
+ free (prev_file);
+ prev_file = xstrdup (file);
+ }
+ }
+
+ /* Let the world know that we are in the middle of generating a
+ piece of stabs line debugging information. */
+ outputting_stabs_line_debug = 1;
+
+ generate_asm_file (N_SOL, file);
+
+ sprintf (sym, "%sL%d", FAKE_LABEL_NAME, label_count);
+ ++label_count;
+
+ if (in_dot_func_p)
+ {
+ buf = (char *) alloca (100 + strlen (current_function_label));
+ sprintf (buf, "%d,0,%d,%s-%s\n", N_SLINE, lineno,
+ sym, current_function_label);
+ }
+ else
+ {
+ buf = (char *) alloca (100);
+ sprintf (buf, "%d,0,%d,%s\n", N_SLINE, lineno, sym);
+ }
+ input_line_pointer = buf;
+ s_stab ('n');
+ colon (sym);
+
+ input_line_pointer = hold;
+ outputting_stabs_line_debug = 0;
+}
+
+/* Emit a function stab.
+ All assembler functions are assumed to have return type `void'. */
+
+void
+stabs_generate_asm_func (const char *funcname, const char *startlabname)
+{
+ static int void_emitted_p;
+ char *hold = input_line_pointer;
+ char *buf;
+ char *file;
+ unsigned int lineno;
+
+ if (! void_emitted_p)
+ {
+ input_line_pointer = "\"void:t1=1\",128,0,0,0";
+ s_stab ('s');
+ void_emitted_p = 1;
+ }
+
+ as_where (&file, &lineno);
+ if (asprintf (&buf, "\"%s:F1\",%d,0,%d,%s",
+ funcname, N_FUN, lineno + 1, startlabname) == -1)
+ as_fatal ("%s", xstrerror (errno));
+ input_line_pointer = buf;
+ s_stab ('s');
+ free (buf);
+
+ input_line_pointer = hold;
+ current_function_label = xstrdup (startlabname);
+ in_dot_func_p = 1;
+}
+
+/* Emit a stab to record the end of a function. */
+
+void
+stabs_generate_asm_endfunc (const char *funcname ATTRIBUTE_UNUSED,
+ const char *startlabname)
+{
+ static int label_count;
+ char *hold = input_line_pointer;
+ char *buf;
+ char sym[30];
+
+ sprintf (sym, "%sendfunc%d", FAKE_LABEL_NAME, label_count);
+ ++label_count;
+ colon (sym);
+
+ if (asprintf (&buf, "\"\",%d,0,0,%s-%s", N_FUN, sym, startlabname) == -1)
+ as_fatal ("%s", xstrerror (errno));
+ input_line_pointer = buf;
+ s_stab ('s');
+ free (buf);
+
+ input_line_pointer = hold;
+ in_dot_func_p = 0;
+ current_function_label = NULL;
+}
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