/* Generic stabs parsing for gas.
- Copyright (C) 1989-2016 Free Software Foundation, Inc.
+ Copyright (C) 1989-2021 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
int outputting_stabs_line_debug = 0;
-static void s_stab_generic (int, const char *, const char *);
static void generate_asm_file (int, const char *);
/* Allow backends to override the names used for the stab sections. */
#define STAB_STRING_SECTION_NAME ".stabstr"
#endif
-/* Non-zero if we're in the middle of a .func function, in which case
+/* True 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;
+static bfd_boolean in_dot_func_p = FALSE;
-/* Label at start of current function if in_dot_func_p != 0. */
+/* Label at start of current function if in_dot_func_p != FALSE. */
static const char *current_function_label;
/*
#endif
unsigned int
-get_stab_string_offset (const char *string, const char *stabstr_secname)
+get_stab_string_offset (const char *string, const char *stabstr_secname,
+ bfd_boolean free_stabstr_secname)
{
unsigned int length;
unsigned int retval;
save_seg = now_seg;
save_subseg = now_subseg;
- /* Create the stab string section. */
+ /* Create the stab string section, if it doesn't already exist. */
seg = subseg_new (stabstr_secname, 0);
+ if (free_stabstr_secname && seg->name != stabstr_secname)
+ free ((char *) stabstr_secname);
retval = seg_info (seg)->stabu.stab_string_size;
if (retval <= 0)
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);
+ bfd_set_section_flags (seg, SEC_READONLY | SEC_DEBUGGING);
}
if (length > 0)
/* 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;
- int type, other, desc;
+aout_process_stab (int what, const char *string, int type, int other, int desc)
{
/* Put the stab information in the symbol table. */
symbolS *symbol;
symbol chain. This is to avoid "continuation symbols" (where one
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,
- &zero_address_frag);
+ symbol = symbol_create (string, undefined_section, &zero_address_frag, 0);
if (what == 's' || what == 'n')
{
/* Pick up the value from the input line. */
#endif
/* This can handle different kinds of stabs (s,n,d) and different
- kinds of stab sections. */
+ kinds of stab sections. If STAB_SECNAME_OBSTACK_END is non-NULL,
+ then STAB_SECNAME and STABSTR_SECNAME will be freed if possible
+ before this function returns (the former by obstack_free). */
static void
-s_stab_generic (int what,
- const char * stab_secname,
- const char * stabstr_secname)
+s_stab_generic (int what,
+ const char *stab_secname,
+ const char *stabstr_secname,
+ const char *stab_secname_obstack_end)
{
long longint;
const char *string;
int length;
string = demand_copy_C_string (&length);
+ if (string == NULL)
+ {
+ as_warn (_(".stab%c: missing string"), what);
+ ignore_rest_of_line ();
+ return;
+ }
/* 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;
+ saved_string_obstack_end = obstack_next_free (¬es);
SKIP_WHITESPACE ();
if (*input_line_pointer == ',')
input_line_pointer++;
char *p;
static segT cached_sec;
- static char *cached_secname;
dot = frag_now_fix ();
md_flush_pending_output ();
#endif
- if (cached_secname && !strcmp (cached_secname, stab_secname))
+ if (cached_sec && strcmp (cached_sec->name, stab_secname) == 0)
{
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)
{
- bfd_set_section_flags (stdoutput, seg,
+ bfd_set_section_flags (seg,
SEC_READONLY | SEC_RELOC | SEC_DEBUGGING);
#ifdef INIT_STAB_SECTION
INIT_STAB_SECTION (seg);
seg_info (seg)->hadone = 1;
}
- 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);
- }
+ stroff = get_stab_string_offset (string, stabstr_secname,
+ stab_secname_obstack_end != NULL);
+
+ /* Release the string, if nobody else has used the obstack. */
+ if (saved_string_obstack_end != NULL
+ && saved_string_obstack_end == obstack_next_free (¬es))
+ obstack_free (¬es, string);
+ /* Similarly for the section name. This must be done before
+ creating symbols below, which uses the notes obstack. */
+ if (seg->name != stab_secname
+ && stab_secname_obstack_end != NULL
+ && stab_secname_obstack_end == obstack_next_free (¬es))
+ obstack_free (¬es, stab_secname);
/* At least for now, stabs in a special stab section are always
output as 12 byte blocks of information. */
expressionS exp;
/* Arrange for a value representing the current location. */
- symbol = symbol_temp_new (saved_seg, dot, saved_frag);
+ symbol = symbol_temp_new (saved_seg, saved_frag, dot);
exp.X_op = O_symbol;
exp.X_add_symbol = symbol;
}
else
{
+ if (stab_secname_obstack_end != NULL)
+ {
+ free ((char *) stabstr_secname);
+ if (stab_secname_obstack_end == obstack_next_free (¬es))
+ obstack_free (¬es, stab_secname);
+ }
#ifdef OBJ_PROCESS_STAB
OBJ_PROCESS_STAB (0, what, string, type, other, desc);
#else
void
s_stab (int what)
{
- s_stab_generic (what, STAB_SECTION_NAME, STAB_STRING_SECTION_NAME);
+ s_stab_generic (what, STAB_SECTION_NAME, STAB_STRING_SECTION_NAME, NULL);
}
/* "Extended stabs", used in Solaris only now. */
s_xstab (int what)
{
int length;
- char *stab_secname, *stabstr_secname;
- static char *saved_secname, *saved_strsecname;
+ char *stab_secname, *stabstr_secname, *stab_secname_obstack_end;
- /* @@ 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);
+ stab_secname_obstack_end = obstack_next_free (¬es);
SKIP_WHITESPACE ();
if (*input_line_pointer == ',')
input_line_pointer++;
/* To get the name of the stab string section, simply add "str" to
the stab section name. */
- 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);
+ stabstr_secname = concat (stab_secname, "str", (char *) NULL);
+ s_stab_generic (what, stab_secname, stabstr_secname,
+ stab_secname_obstack_end);
}
#ifdef S_SET_DESC
/* Frob invented at RMS' request. Set the n_desc of a symbol. */
void
-s_desc (ignore)
- int ignore ATTRIBUTE_UNUSED;
+s_desc (int ignore ATTRIBUTE_UNUSED)
{
char *name;
char c;
char *dir2;
dir = remap_debug_filename (getpwd ());
- dir2 = (char *) alloca (strlen (dir) + 2);
- sprintf (dir2, "%s%s", dir, "/");
+ dir2 = concat (dir, "/", NULL);
generate_asm_file (N_SO, dir2);
+ free (dir2);
xfree ((char *) dir);
}
generate_asm_file (N_SO, file);
{
static char *last_file;
static int label_count;
- char *hold;
char sym[30];
char *buf;
const char *tmp = file;
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 = buf = XNEWVEC (char, 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);
+ const char *bslash = strchr (tmp, '\\');
+ size_t len = bslash != NULL ? bslash - tmp + 1 : file_endp - 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);
+ memcpy (bufp, tmp, len);
tmp += len;
bufp += len;
sprintf (bufp, "\",%d,0,0,%s\n", type, sym);
- input_line_pointer = buf;
+ temp_ilp (buf);
s_stab ('s');
+ restore_ilp ();
+
colon (sym);
- if (last_file != NULL)
- free (last_file);
+ free (last_file);
last_file = xstrdup (file);
free (buf);
-
- input_line_pointer = hold;
}
/* Generate stabs debugging information for the current line. This is
stabs_generate_asm_lineno (void)
{
static int label_count;
- char *hold;
const char *file;
unsigned int lineno;
char *buf;
existing stabs hook, which expect to see a string, rather than
inventing new ones. */
- hold = input_line_pointer;
-
file = as_where (&lineno);
/* Don't emit sequences of stabs for the same line. */
if (prev_file == NULL)
{
- /* First time thru. */
+ /* First time through. */
prev_file = xstrdup (file);
prev_lineno = lineno;
}
if (in_dot_func_p)
{
- buf = (char *) alloca (100 + strlen (current_function_label));
+ buf = XNEWVEC (char, 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);
+ buf = XNEWVEC (char, 100);
sprintf (buf, "%d,0,%d,%s\n", N_SLINE, lineno, sym);
}
- input_line_pointer = buf;
+
+ temp_ilp (buf);
s_stab ('n');
+ restore_ilp ();
+
colon (sym);
- input_line_pointer = hold;
outputting_stabs_line_debug = 0;
+ free (buf);
}
/* Emit a function stab.
void
stabs_generate_asm_func (const char *funcname, const char *startlabname)
{
- static int void_emitted_p;
- char *hold = input_line_pointer;
+ static bfd_boolean void_emitted_p = FALSE;
char *buf;
unsigned int lineno;
if (! void_emitted_p)
{
- input_line_pointer = "\"void:t1=1\",128,0,0,0";
+ temp_ilp ((char *) "\"void:t1=1\",128,0,0,0");
s_stab ('s');
- void_emitted_p = 1;
+ restore_ilp ();
+ void_emitted_p = TRUE;
}
as_where (&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;
+
+ temp_ilp (buf);
s_stab ('s');
+ restore_ilp ();
free (buf);
- input_line_pointer = hold;
current_function_label = xstrdup (startlabname);
- in_dot_func_p = 1;
+ in_dot_func_p = TRUE;
}
/* Emit a stab to record the end of a function. */
const char *startlabname)
{
static int label_count;
- char *hold = input_line_pointer;
char *buf;
char sym[30];
if (asprintf (&buf, "\"\",%d,0,0,%s-%s", N_FUN, sym, startlabname) == -1)
as_fatal ("%s", xstrerror (errno));
- input_line_pointer = buf;
+
+ temp_ilp (buf);
s_stab ('s');
+ restore_ilp ();
free (buf);
- input_line_pointer = hold;
- in_dot_func_p = 0;
+ in_dot_func_p = FALSE;
current_function_label = NULL;
}
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