/* dwarf2dbg.c - DWARF2 debug support
- Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
This file is part of GAS, the GNU Assembler.
#endif
#include "dwarf2dbg.h"
+#include <filenames.h>
+
+#ifndef DWARF2_FORMAT
+# define DWARF2_FORMAT() dwarf2_format_32bit
+#endif
+
+#ifndef DWARF2_ADDR_SIZE
+# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8);
+#endif
+
+#ifndef TC_DWARF2_EMIT_OFFSET
+# define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
+#endif
#ifdef BFD_ASSEMBLER
static struct line_seg *all_segs;
struct file_entry {
- char *filename;
+ const char *filename;
unsigned int dir;
};
static unsigned int files_in_use;
static unsigned int files_allocated;
-/* True when we've seen a .loc directive recently. Used to avoid
+/* Table of directories used by .debug_line. */
+static char **dirs;
+static unsigned int dirs_in_use;
+static unsigned int dirs_allocated;
+
+/* TRUE when we've seen a .loc directive recently. Used to avoid
doing work when there's nothing to do. */
-static boolean loc_directive_seen;
+static bfd_boolean loc_directive_seen;
/* Current location as indicated by the most recent .loc directive. */
static struct dwarf2_line_info current;
-/* Fake label name. */
-static char const fake_label_name[] = ".L0\001";
-
/* The size of an address on the target. */
static unsigned int sizeof_address;
\f
+static void generic_dwarf2_emit_offset PARAMS((symbolS *, unsigned int));
static struct line_subseg *get_line_subseg PARAMS ((segT, subsegT));
-static unsigned int get_filenum PARAMS ((const char *));
+static unsigned int get_filenum PARAMS ((const char *, unsigned int));
static struct frag *first_frag_for_seg PARAMS ((segT));
static struct frag *last_frag_for_seg PARAMS ((segT));
static void out_byte PARAMS ((int));
static void out_four PARAMS ((int));
static void out_abbrev PARAMS ((int, int));
static void out_uleb128 PARAMS ((addressT));
-static symbolS *symbol_new_now PARAMS ((void));
-static void set_symbol_value_now PARAMS ((symbolS *));
static offsetT get_frag_fix PARAMS ((fragS *));
static void out_set_addr PARAMS ((segT, fragS *, addressT));
static int size_inc_line_addr PARAMS ((int, addressT));
static void out_debug_abbrev PARAMS ((segT));
static void out_debug_info PARAMS ((segT, segT, segT));
\f
+/* Create an offset to .dwarf2_*. */
+
+static void
+generic_dwarf2_emit_offset (symbol, size)
+ symbolS *symbol;
+ unsigned int size;
+{
+ expressionS expr;
+
+ expr.X_op = O_symbol;
+ expr.X_add_symbol = symbol;
+ expr.X_add_number = 0;
+ emit_expr (&expr, size);
+}
+
/* Find or create an entry for SEG+SUBSEG in ALL_SEGS. */
static struct line_subseg *
{
char *filename;
as_where (&filename, &line->line);
- line->filenum = get_filenum (filename);
+ line->filenum = get_filenum (filename, 0);
line->column = 0;
line->flags = DWARF2_FLAG_BEGIN_STMT;
}
/* Unless we generate DWARF2 debugging information for each
assembler line, we only emit one line symbol for one LOC. */
if (debug_type != DEBUG_DWARF2)
- loc_directive_seen = false;
+ loc_directive_seen = FALSE;
}
else if (debug_type != DEBUG_DWARF2)
return;
dwarf2_gen_line_info (frag_now_fix () - size, &loc);
}
-/* Get a .debug_line file number for FILENAME. */
+/* Get a .debug_line file number for FILENAME. If NUM is nonzero,
+ allocate it on that file table slot, otherwise return the first
+ empty one. */
static unsigned int
-get_filenum (filename)
+get_filenum (filename, num)
const char *filename;
+ unsigned int num;
{
- static unsigned int last_used;
- unsigned int i;
+ static unsigned int last_used, last_used_dir_len;
+ const char *file;
+ size_t dir_len;
+ unsigned int i, dir;
- if (last_used)
- if (strcmp (filename, files[last_used].filename) == 0)
- return last_used;
+ if (num == 0 && last_used)
+ {
+ if (! files[last_used].dir
+ && strcmp (filename, files[last_used].filename) == 0)
+ return last_used;
+ if (files[last_used].dir
+ && strncmp (filename, dirs[files[last_used].dir],
+ last_used_dir_len) == 0
+ && IS_DIR_SEPARATOR (filename [last_used_dir_len])
+ && strcmp (filename + last_used_dir_len + 1,
+ files[last_used].filename) == 0)
+ return last_used;
+ }
- for (i = 1; i < files_in_use; ++i)
- if (strcmp (filename, files[i].filename) == 0)
- return i;
+ file = lbasename (filename);
+ /* Don't make empty string from / or A: from A:/ . */
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+ if (file <= filename + 3)
+ file = filename;
+#else
+ if (file == filename + 1)
+ file = filename;
+#endif
+ dir_len = file - filename;
+
+ dir = 0;
+ if (dir_len)
+ {
+ --dir_len;
+ for (dir = 1; dir < dirs_in_use; ++dir)
+ if (memcmp (filename, dirs[dir], dir_len) == 0
+ && dirs[dir][dir_len] == '\0')
+ break;
+
+ if (dir >= dirs_in_use)
+ {
+ if (dir >= dirs_allocated)
+ {
+ dirs_allocated = dir + 32;
+ dirs = (char **)
+ xrealloc (dirs, (dir + 32) * sizeof (const char *));
+ }
+
+ dirs[dir] = xmalloc (dir_len + 1);
+ memcpy (dirs[dir], filename, dir_len);
+ dirs[dir][dir_len] = '\0';
+ dirs_in_use = dir + 1;
+ }
+ }
+
+ if (num == 0)
+ {
+ for (i = 1; i < files_in_use; ++i)
+ if (files[i].dir == dir
+ && files[i].filename
+ && strcmp (file, files[i].filename) == 0)
+ {
+ last_used = i;
+ last_used_dir_len = dir_len;
+ return i;
+ }
+ }
+ else
+ i = num;
if (i >= files_allocated)
{
memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry));
}
- files[i].filename = xstrdup (filename);
- files[i].dir = 0;
+ files[i].filename = num ? file : xstrdup (file);
+ files[i].dir = dir;
files_in_use = i + 1;
last_used = i;
+ last_used_dir_len = dir_len;
return i;
}
return NULL;
}
- if (num >= (int) files_allocated)
- {
- unsigned int old = files_allocated;
-
- files_allocated = num + 16;
- files = (struct file_entry *)
- xrealloc (files, (num + 16) * sizeof (struct file_entry));
-
- /* Zero the new memory. */
- memset (files + old, 0, (num + 16 - old) * sizeof (struct file_entry));
- }
-
- files[num].filename = filename;
- files[num].dir = 0;
- files_in_use = num + 1;
+ get_filenum (filename, num);
return filename;
}
current.column = column;
current.flags = DWARF2_FLAG_BEGIN_STMT;
- loc_directive_seen = true;
+ loc_directive_seen = TRUE;
#ifndef NO_LISTING
if (listing)
{
- listing_source_file (files[filenum].filename);
+ if (files[filenum].dir)
+ {
+ 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);
+
+ memcpy (cp, dirs[files[filenum].dir], dir_len);
+ cp[dir_len] = '/';
+ memcpy (cp + dir_len + 1, files[filenum].filename, file_len);
+ cp[dir_len + file_len + 1] = '\0';
+ listing_source_file (cp);
+ }
+ else
+ listing_source_file (files[filenum].filename);
listing_source_line (line);
}
#endif
out_uleb128 (form);
}
-/* Create a new fake symbol whose value is the current position. */
-
-static symbolS *
-symbol_new_now ()
-{
- return symbol_new (fake_label_name, now_seg, frag_now_fix (), frag_now);
-}
-
-/* Set the value of SYM to the current position in the current segment. */
-
-static void
-set_symbol_value_now (sym)
- symbolS *sym;
-{
- S_SET_SEGMENT (sym, now_seg);
- S_SET_VALUE (sym, frag_now_fix ());
- symbol_set_frag (sym, frag_now);
-}
-
/* Get the size of a fragment. */
static offsetT
expressionS expr;
symbolS *sym;
- sym = symbol_new (fake_label_name, seg, ofs, frag);
+ sym = symbol_temp_new (seg, ofs, frag);
out_opcode (DW_LNS_extended_op);
out_uleb128 (sizeof_address + 1);
emit_expr (&expr, sizeof_address);
}
+#if DWARF2_LINE_MIN_INSN_LENGTH > 1
+static void scale_addr_delta PARAMS ((addressT *));
+
+static void
+scale_addr_delta (addr_delta)
+ addressT *addr_delta;
+{
+ static int printed_this = 0;
+ if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0)
+ {
+ if (!printed_this)
+ as_bad("unaligned opcodes detected in executable segment");
+ printed_this = 1;
+ }
+ *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
+}
+#else
+#define scale_addr_delta(A)
+#endif
+
/* Encode a pair of line and address skips as efficiently as possible.
Note that the line skip is signed, whereas the address skip is unsigned.
int len = 0;
/* Scale the address delta by the minimum instruction length. */
-#if DWARF2_LINE_MIN_INSN_LENGTH > 1
- assert (addr_delta % DWARF2_LINE_MIN_INSN_LENGTH == 0);
- addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
-#endif
+ scale_addr_delta (&addr_delta);
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
We cannot use special opcodes here, since we want the end_sequence
int need_copy = 0;
char *end = p + len;
-#if DWARF2_LINE_MIN_INSN_LENGTH > 1
/* Scale the address delta by the minimum instruction length. */
- assert (addr_delta % DWARF2_LINE_MIN_INSN_LENGTH == 0);
- addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
-#endif
+ scale_addr_delta (&addr_delta);
+
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence.
We cannot use special opcodes here, since we want the end_sequence
to emit the matrix entry. */
expressionS expr;
int max_chars;
- to_sym = symbol_new (fake_label_name, seg, to_ofs, to_frag);
- from_sym = symbol_new (fake_label_name, seg, from_ofs, from_frag);
+ to_sym = symbol_temp_new (seg, to_ofs, to_frag);
+ from_sym = symbol_temp_new (seg, from_ofs, from_frag);
expr.X_op = O_subtract;
expr.X_add_symbol = to_sym;
char *cp;
unsigned int i;
- /* Terminate directory list. */
+ /* Emit directory list. */
+ for (i = 1; i < dirs_in_use; ++i)
+ {
+ size = strlen (dirs[i]) + 1;
+ cp = frag_more (size);
+ memcpy (cp, dirs[i], size);
+ }
+ /* Terminate it. */
out_byte ('\0');
for (i = 1; i < files_in_use; ++i)
if (files[i].filename == NULL)
{
as_bad (_("unassigned file number %ld"), (long) i);
+ /* Prevent a crash later, particularly for file 1. */
+ files[i].filename = "";
continue;
}
symbolS *prologue_end;
symbolS *line_end;
struct line_seg *s;
+ enum dwarf2_format d2f;
+ int sizeof_offset;
subseg_set (line_seg, 0);
- line_start = symbol_new_now ();
- prologue_end = symbol_make (fake_label_name);
- line_end = symbol_make (fake_label_name);
+ line_start = symbol_temp_new_now ();
+ prologue_end = symbol_temp_make ();
+ line_end = symbol_temp_make ();
/* Total length of the information for this compilation unit. */
expr.X_op = O_subtract;
expr.X_add_symbol = line_end;
expr.X_op_symbol = line_start;
- expr.X_add_number = -4;
- emit_expr (&expr, 4);
+
+ d2f = DWARF2_FORMAT ();
+ if (d2f == dwarf2_format_32bit)
+ {
+ expr.X_add_number = -4;
+ emit_expr (&expr, 4);
+ sizeof_offset = 4;
+ }
+ else if (d2f == dwarf2_format_64bit)
+ {
+ expr.X_add_number = -12;
+ out_four (-1);
+ emit_expr (&expr, 8);
+ sizeof_offset = 8;
+ }
+ else if (d2f == dwarf2_format_64bit_irix)
+ {
+ expr.X_add_number = -8;
+ emit_expr (&expr, 8);
+ sizeof_offset = 8;
+ }
+ else
+ {
+ as_fatal (_("internal error: unknown dwarf2 format"));
+ }
/* Version. */
out_two (2);
expr.X_add_symbol = prologue_end;
expr.X_op_symbol = line_start;
expr.X_add_number = - (4 + 2 + 4);
- emit_expr (&expr, 4);
+ emit_expr (&expr, sizeof_offset);
/* Parameters of the state machine. */
out_byte (DWARF2_LINE_MIN_INSN_LENGTH);
out_file_list ();
- set_symbol_value_now (prologue_end);
+ symbol_set_value_now (prologue_end);
/* For each section, emit a statement program. */
for (s = all_segs; s; s = s->next)
process_entries (s->seg, s->head->head);
- set_symbol_value_now (line_end);
+ symbol_set_value_now (line_end);
}
/* Emit data for .debug_aranges. */
out_two (2);
/* Offset to .debug_info. */
- expr.X_op = O_symbol;
- expr.X_add_symbol = section_symbol (info_seg);
- expr.X_add_number = 0;
- emit_expr (&expr, 4);
+ /* ??? sizeof_offset */
+ TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4);
/* Size of an address (offset portion). */
out_byte (addr_size);
symbolS *beg, *end;
frag = first_frag_for_seg (s->seg);
- beg = symbol_new (fake_label_name, s->seg, 0, frag);
+ beg = symbol_temp_new (s->seg, 0, frag);
s->text_start = beg;
frag = last_frag_for_seg (s->seg);
- end = symbol_new (fake_label_name, s->seg, get_frag_fix (frag), frag);
+ end = symbol_temp_new (s->seg, get_frag_fix (frag), frag);
s->text_end = end;
expr.X_op = O_symbol;
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
out_abbrev (DW_AT_high_pc, DW_FORM_addr);
}
+ 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_language, DW_FORM_data2);
symbolS *info_end;
char *p;
int len;
+ enum dwarf2_format d2f;
+ int sizeof_offset;
subseg_set (info_seg, 0);
- info_start = symbol_new_now ();
- info_end = symbol_make (fake_label_name);
+ info_start = symbol_temp_new_now ();
+ info_end = symbol_temp_make ();
/* Compilation Unit length. */
expr.X_op = O_subtract;
expr.X_add_symbol = info_end;
expr.X_op_symbol = info_start;
- expr.X_add_number = -4;
- emit_expr (&expr, 4);
+
+ d2f = DWARF2_FORMAT ();
+ if (d2f == dwarf2_format_32bit)
+ {
+ expr.X_add_number = -4;
+ emit_expr (&expr, 4);
+ sizeof_offset = 4;
+ }
+ else if (d2f == dwarf2_format_64bit)
+ {
+ expr.X_add_number = -12;
+ out_four (-1);
+ emit_expr (&expr, 8);
+ sizeof_offset = 8;
+ }
+ else if (d2f == dwarf2_format_64bit_irix)
+ {
+ expr.X_add_number = -8;
+ emit_expr (&expr, 8);
+ sizeof_offset = 8;
+ }
+ else
+ {
+ as_fatal (_("internal error: unknown dwarf2 format"));
+ }
/* DWARF version. */
out_two (2);
/* .debug_abbrev offset */
- expr.X_op = O_symbol;
- expr.X_add_symbol = section_symbol (abbrev_seg);
- expr.X_add_number = 0;
- emit_expr (&expr, 4);
+ TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset);
/* Target address size. */
out_byte (sizeof_address);
out_uleb128 (1);
/* DW_AT_stmt_list */
- expr.X_op = O_symbol;
- expr.X_add_symbol = section_symbol (line_seg);
- expr.X_add_number = 0;
- emit_expr (&expr, 4);
+ /* ??? sizeof_offset */
+ TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4);
/* These two attributes may only be emitted if all of the code is
contiguous. Multiple sections are not that. */
emit_expr (&expr, sizeof_address);
}
+ /* 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. */
+ if (!files || files_in_use < 1)
+ abort ();
+ if (files[1].dir)
+ {
+ len = strlen (dirs[files[1].dir]);
+ p = frag_more (len + 1);
+ memcpy (p, dirs[files[1].dir], len);
+ p[len] = '/';
+ }
+ len = strlen (files[1].filename) + 1;
+ p = frag_more (len);
+ memcpy (p, files[1].filename, len);
+
/* DW_AT_comp_dir */
comp_dir = getpwd ();
len = strlen (comp_dir) + 1;
dwarf2 draft has no standard code for assembler. */
out_two (DW_LANG_Mips_Assembler);
- set_symbol_value_now (info_end);
+ symbol_set_value_now (info_end);
}
void
return;
/* Calculate the size of an address for the target machine. */
- sizeof_address = bfd_arch_bits_per_address (stdoutput) / 8;
+ sizeof_address = DWARF2_ADDR_SIZE (stdoutput);
/* Create and switch to the line number section. */
line_seg = subseg_new (".debug_line", 0);
projects / binutils-gdb.git / blobdiff