/* dwarf2dbg.c - DWARF2 debug support
- Copyright (C) 1999-2015 Free Software Foundation, Inc.
+ Copyright (C) 1999-2017 Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of GAS, the GNU Assembler.
# define DWARF2_USE_FIXED_ADVANCE_PC linkrelax
#endif
-/* First special line opcde - leave room for the standard opcodes.
+/* First special line opcode - leave room for the standard opcodes.
Note: If you want to change this, you'll have to update the
"standard_opcode_lengths" table that is emitted below in
out_debug_line(). */
if (!create_p)
return NULL;
- s = (struct line_seg *) xmalloc (sizeof (*s));
+ s = XNEW (struct line_seg);
s->next = NULL;
s->seg = seg;
s->head = NULL;
break;
}
- lss = (struct line_subseg *) xmalloc (sizeof (*lss));
+ lss = XNEW (struct line_subseg);
lss->next = *pss;
lss->subseg = subseg;
lss->head = NULL;
struct line_subseg *lss;
struct line_entry *e;
- e = (struct line_entry *) xmalloc (sizeof (*e));
+ e = XNEW (struct line_entry);
e->next = NULL;
e->label = label;
e->loc = *loc;
{
if (debug_type == DEBUG_DWARF2)
{
- char *filename;
- as_where (&filename, &line->line);
+ const char *filename = as_where (&line->line);
line->filenum = get_filenum (filename, 0);
line->column = 0;
line->flags = DWARF2_FLAG_IS_STMT;
if (dir >= dirs_allocated)
{
dirs_allocated = dir + 32;
- dirs = (char **)
- xrealloc (dirs, (dir + 32) * sizeof (const char *));
+ dirs = XRESIZEVEC (char *, dirs, dirs_allocated);
}
- dirs[dir] = (char *) xmalloc (dir_len + 1);
- memcpy (dirs[dir], filename, dir_len);
- dirs[dir][dir_len] = '\0';
+ dirs[dir] = xmemdup0 (filename, dir_len);
dirs_in_use = dir + 1;
}
}
unsigned int old = files_allocated;
files_allocated = i + 32;
- files = (struct file_entry *)
- xrealloc (files, (i + 32) * sizeof (struct file_entry));
+ files = XRESIZEVEC (struct file_entry, files, files_allocated);
memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry));
}
{
size_t dir_len = strlen (dirs[files[filenum].dir]);
size_t file_len = strlen (files[filenum].filename);
- char *cp = (char *) alloca (dir_len + 1 + file_len + 1);
+ char *cp = XNEWVEC (char, dir_len + 1 + file_len + 1);
memcpy (cp, dirs[files[filenum].dir], dir_len);
INSERT_DIR_SEPARATOR (cp, dir_len);
memcpy (cp + dir_len + 1, files[filenum].filename, file_len);
cp[dir_len + file_len + 1] = '\0';
listing_source_file (cp);
+ free (cp);
}
else
listing_source_file (files[filenum].filename);
char *p, c;
offsetT value;
- p = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& p);
if (strcmp (p, "basic_block") == 0)
{
}
else if (strcmp (p, "is_stmt") == 0)
{
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
value = get_absolute_expression ();
if (value == 0)
current.flags &= ~DWARF2_FLAG_IS_STMT;
}
else if (strcmp (p, "isa") == 0)
{
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
value = get_absolute_expression ();
if (value >= 0)
current.isa = value;
}
else if (strcmp (p, "discriminator") == 0)
{
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
value = get_absolute_expression ();
if (value >= 0)
current.discriminator = value;
else
{
as_bad (_("unknown .loc sub-directive `%s'"), p);
- *input_line_pointer = c;
+ (void) restore_line_pointer (c);
return;
}
- SKIP_WHITESPACE ();
+ SKIP_WHITESPACE_AFTER_NAME ();
}
demand_empty_rest_of_line ();
if (DWARF2_USE_FIXED_ADVANCE_PC)
{
- /* If linker relaxation is enabled then the distance bewteen the two
+ /* If linker relaxation is enabled then the distance between the two
symbols in the frag->fr_symbol expression might change. Hence we
cannot rely upon the value computed by resolve_symbol_value.
Instead we leave the expression unfinalized and allow
char * name;
const char * sec_name;
- /* Switch to the relevent sub-section before we start to emit
+ /* Switch to the relevant sub-section before we start to emit
the line number table.
FIXME: These sub-sections do not have a normal Line Number
section, as well as our sub-sections, and we have to ensure
that all of the sub-sections are merged into a proper
.debug_line section before a debugger sees them. */
-
+
sec_name = bfd_get_section_name (stdoutput, seg);
if (strcmp (sec_name, ".text") != 0)
{
- unsigned int len;
-
- len = strlen (sec_name);
- name = xmalloc (len + 11 + 2);
- sprintf (name, ".debug_line%s", sec_name);
+ name = concat (".debug_line", sec_name, (char *) NULL);
subseg_set (subseg_get (name, FALSE), 0);
}
else
/* Switch to SEC and output a header length field. Return the size of
offsets used in SEC. The caller must set EXPR->X_add_symbol value
- to the end of the section. */
+ to the end of the section. EXPR->X_add_number will be set to the
+ negative size of the header. */
static int
out_header (asection *sec, expressionS *exp)
symbolS *end_sym;
subseg_set (sec, 0);
- start_sym = symbol_temp_new_now ();
- end_sym = symbol_temp_make ();
+
+ if (flag_dwarf_sections)
+ {
+ /* If we are going to put the start and end symbols in different
+ sections, then we need real symbols, not just fake, local ones. */
+ frag_now_fix ();
+ start_sym = symbol_make (".Ldebug_line_start");
+ end_sym = symbol_make (".Ldebug_line_end");
+ symbol_set_value_now (start_sym);
+ }
+ else
+ {
+ start_sym = symbol_temp_new_now ();
+ end_sym = symbol_temp_make ();
+ }
/* Total length of the information. */
exp->X_op = O_subtract;
out_debug_aranges (segT aranges_seg, segT info_seg)
{
unsigned int addr_size = sizeof_address;
+ offsetT size;
struct line_seg *s;
expressionS exp;
symbolS *aranges_end;
sizeof_offset = out_header (aranges_seg, &exp);
aranges_end = exp.X_add_symbol;
+ size = -exp.X_add_number;
/* Version. */
out_two (DWARF2_ARANGES_VERSION);
+ size += 2;
/* Offset to .debug_info. */
TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);
+ size += sizeof_offset;
/* Size of an address (offset portion). */
out_byte (addr_size);
+ size++;
/* Size of a segment descriptor. */
out_byte (0);
+ size++;
/* Align the header. */
- frag_align (ffs (2 * addr_size) - 1, 0, 0);
+ while ((size++ % (2 * addr_size)) > 0)
+ out_byte (0);
for (s = all_segs; s; s = s->next)
{
else
out_abbrev (DW_AT_ranges, DW_FORM_data8);
}
- out_abbrev (DW_AT_name, DW_FORM_string);
- out_abbrev (DW_AT_comp_dir, DW_FORM_string);
- out_abbrev (DW_AT_producer, DW_FORM_string);
+ out_abbrev (DW_AT_name, DW_FORM_strp);
+ out_abbrev (DW_AT_comp_dir, DW_FORM_strp);
+ out_abbrev (DW_AT_producer, DW_FORM_strp);
out_abbrev (DW_AT_language, DW_FORM_data2);
out_abbrev (0, 0);
/* Emit a description of this compilation unit for .debug_info. */
static void
-out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg)
+out_debug_info (segT info_seg, segT abbrev_seg, segT line_seg, segT ranges_seg,
+ symbolS *name_sym, symbolS *comp_dir_sym, symbolS *producer_sym)
{
- char producer[128];
- const char *comp_dir;
- const char *dirname;
expressionS exp;
symbolS *info_end;
- char *p;
- int len;
int sizeof_offset;
sizeof_offset = out_header (info_seg, &exp);
TC_DWARF2_EMIT_OFFSET (section_symbol (ranges_seg), sizeof_offset);
}
+ /* DW_AT_name, DW_AT_comp_dir and DW_AT_producer. Symbols in .debug_str
+ setup in out_debug_str below. */
+ TC_DWARF2_EMIT_OFFSET (name_sym, sizeof_offset);
+ TC_DWARF2_EMIT_OFFSET (comp_dir_sym, sizeof_offset);
+ TC_DWARF2_EMIT_OFFSET (producer_sym, sizeof_offset);
+
+ /* DW_AT_language. Yes, this is probably not really MIPS, but the
+ dwarf2 draft has no standard code for assembler. */
+ out_two (DW_LANG_Mips_Assembler);
+
+ symbol_set_value_now (info_end);
+}
+
+/* Emit the three debug strings needed in .debug_str and setup symbols
+ to them for use in out_debug_info. */
+static void
+out_debug_str (segT str_seg, symbolS **name_sym, symbolS **comp_dir_sym,
+ symbolS **producer_sym)
+{
+ char producer[128];
+ const char *comp_dir;
+ const char *dirname;
+ char *p;
+ int len;
+
+ subseg_set (str_seg, 0);
+
/* DW_AT_name. We don't have the actual file name that was present
on the command line, so assume files[1] is the main input file.
We're not supposed to get called unless at least one line number
entry was emitted, so this should always be defined. */
+ *name_sym = symbol_temp_new_now ();
if (files_in_use == 0)
abort ();
if (files[1].dir)
memcpy (p, files[1].filename, len);
/* DW_AT_comp_dir */
+ *comp_dir_sym = symbol_temp_new_now ();
comp_dir = remap_debug_filename (getpwd ());
len = strlen (comp_dir) + 1;
p = frag_more (len);
memcpy (p, comp_dir, len);
/* DW_AT_producer */
+ *producer_sym = symbol_temp_new_now ();
sprintf (producer, "GNU AS %s", VERSION);
len = strlen (producer) + 1;
p = frag_more (len);
memcpy (p, producer, len);
-
- /* DW_AT_language. Yes, this is probably not really MIPS, but the
- dwarf2 draft has no standard code for assembler. */
- out_two (DW_LANG_Mips_Assembler);
-
- symbol_set_value_now (info_end);
}
void
out_debug_line (line_seg);
/* If this is assembler generated line info, and there is no
- debug_info already, we need .debug_info and .debug_abbrev
- sections as well. */
+ debug_info already, we need .debug_info, .debug_abbrev and
+ .debug_str sections as well. */
if (emit_other_sections)
{
segT abbrev_seg;
segT aranges_seg;
segT ranges_seg;
+ segT str_seg;
+ symbolS *name_sym, *comp_dir_sym, *producer_sym;
gas_assert (all_segs);
info_seg = subseg_new (".debug_info", 0);
abbrev_seg = subseg_new (".debug_abbrev", 0);
aranges_seg = subseg_new (".debug_aranges", 0);
+ str_seg = subseg_new (".debug_str", 0);
bfd_set_section_flags (stdoutput, info_seg,
SEC_READONLY | SEC_DEBUGGING);
SEC_READONLY | SEC_DEBUGGING);
bfd_set_section_flags (stdoutput, aranges_seg,
SEC_READONLY | SEC_DEBUGGING);
+ bfd_set_section_flags (stdoutput, str_seg,
+ (SEC_READONLY | SEC_DEBUGGING
+ | SEC_MERGE | SEC_STRINGS));
+ str_seg->entsize = 1;
record_alignment (aranges_seg, ffs (2 * sizeof_address) - 1);
out_debug_aranges (aranges_seg, info_seg);
out_debug_abbrev (abbrev_seg, info_seg, line_seg);
- out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg);
+ out_debug_str (str_seg, &name_sym, &comp_dir_sym, &producer_sym);
+ out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg,
+ name_sym, comp_dir_sym, producer_sym);
}
}
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