/* dwarf2dbg.c - DWARF2 debug support
- Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
.file FILENO "file.c"
.loc FILENO LINENO [COLUMN] [basic_block] [prologue_end] \
- [epilogue_begin] [is_stmt VALUE] [isa VALUE]
+ [epilogue_begin] [is_stmt VALUE] [isa VALUE] \
+ [discriminator VALUE]
*/
#include "as.h"
#endif
#ifndef DWARF2_FORMAT
-# define DWARF2_FORMAT() dwarf2_format_32bit
+# define DWARF2_FORMAT(SEC) dwarf2_format_32bit
#endif
#ifndef DWARF2_ADDR_SIZE
# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
#endif
+#ifndef DWARF2_FILE_NAME
+#define DWARF2_FILE_NAME(FILENAME, DIRNAME) FILENAME
+#endif
+
+#ifndef DWARF2_FILE_TIME_NAME
+#define DWARF2_FILE_TIME_NAME(FILENAME,DIRNAME) 0
+#endif
+
+#ifndef DWARF2_FILE_SIZE_NAME
+#define DWARF2_FILE_SIZE_NAME(FILENAME,DIRNAME) 0
+#endif
+
+#ifndef DWARF2_VERSION
+#define DWARF2_VERSION 2
+#endif
+
+/* The .debug_aranges version has been 2 in DWARF version 2, 3 and 4. */
+#ifndef DWARF2_ARANGES_VERSION
+#define DWARF2_ARANGES_VERSION 2
+#endif
+
+/* This implementation output version 2 .debug_line information. */
+#ifndef DWARF2_LINE_VERSION
+#define DWARF2_LINE_VERSION 2
+#endif
+
#include "subsegs.h"
-#include "elf/dwarf2.h"
+#include "dwarf2.h"
/* Since we can't generate the prolog until the body is complete, we
use three different subsegments for .debug_line: one holding the
opcodes and variable-length operands cannot be used. If this macro is
nonzero, use the DW_LNS_fixed_advance_pc opcode instead. */
#ifndef DWARF2_USE_FIXED_ADVANCE_PC
-# define DWARF2_USE_FIXED_ADVANCE_PC 0
+# define DWARF2_USE_FIXED_ADVANCE_PC linkrelax
#endif
/* First special line opcde - leave room for the standard opcodes.
/* Collects data for all line table entries during assembly. */
static struct line_seg *all_segs;
+/* Hash used to quickly lookup a segment by name, avoiding the need to search
+ through the all_segs list. */
+static struct hash_control *all_segs_hash;
+static struct line_seg **last_seg_ptr;
struct file_entry {
const char *filename;
/* Current location as indicated by the most recent .loc directive. */
static struct dwarf2_line_info current = {
1, 1, 0, 0,
- DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0
+ DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0,
+ 0
};
+/* Lines that are at the same location as CURRENT, and which are waiting
+ for a label. */
+static struct line_entry *pending_lines, **pending_lines_tail = &pending_lines;
+
/* The size of an address on the target. */
static unsigned int sizeof_address;
\f
-static struct line_subseg *get_line_subseg (segT, subsegT);
static unsigned int get_filenum (const char *, unsigned int);
-static struct frag *first_frag_for_seg (segT);
-static struct frag *last_frag_for_seg (segT);
-static void out_byte (int);
-static void out_opcode (int);
-static void out_two (int);
-static void out_four (int);
-static void out_abbrev (int, int);
-static void out_uleb128 (addressT);
-static offsetT get_frag_fix (fragS *, segT);
-static void out_set_addr (symbolS *);
-static int size_inc_line_addr (int, addressT);
-static void emit_inc_line_addr (int, addressT, char *, int);
-static int size_fixed_inc_line_addr (int, addressT);
-static void emit_fixed_inc_line_addr (int, addressT, fragS *, char *, int);
-static void out_inc_line_addr (int, addressT);
-static void relax_inc_line_addr (int, symbolS *, symbolS *);
-static void process_entries (segT, struct line_entry *);
-static void out_file_list (void);
-static void out_debug_line (segT);
-static void out_debug_aranges (segT, segT);
-static void out_debug_abbrev (segT);
-\f
+
#ifndef TC_DWARF2_EMIT_OFFSET
#define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
static void
generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
{
- expressionS expr;
+ expressionS exp;
- expr.X_op = O_symbol;
- expr.X_add_symbol = symbol;
- expr.X_add_number = 0;
- emit_expr (&expr, size);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = symbol;
+ exp.X_add_number = 0;
+ emit_expr (&exp, size);
}
#endif
static subsegT last_subseg;
static struct line_subseg *last_line_subseg;
- struct line_seg **ps, *s;
- struct line_subseg **pss, *ss;
+ struct line_seg *s;
+ struct line_subseg **pss, *lss;
if (seg == last_seg && subseg == last_subseg)
return last_line_subseg;
- for (ps = &all_segs; (s = *ps) != NULL; ps = &s->next)
- if (s->seg == seg)
- goto found_seg;
-
- s = (struct line_seg *) xmalloc (sizeof (*s));
- s->next = NULL;
- s->seg = seg;
- s->head = NULL;
- *ps = s;
+ s = (struct line_seg *) hash_find (all_segs_hash, seg->name);
+ if (s == NULL)
+ {
+ s = (struct line_seg *) xmalloc (sizeof (*s));
+ s->next = NULL;
+ s->seg = seg;
+ s->head = NULL;
+ *last_seg_ptr = s;
+ last_seg_ptr = &s->next;
+ hash_insert (all_segs_hash, seg->name, s);
+ }
+ gas_assert (seg == s->seg);
- found_seg:
- for (pss = &s->head; (ss = *pss) != NULL ; pss = &ss->next)
+ for (pss = &s->head; (lss = *pss) != NULL ; pss = &lss->next)
{
- if (ss->subseg == subseg)
+ if (lss->subseg == subseg)
goto found_subseg;
- if (ss->subseg > subseg)
+ if (lss->subseg > subseg)
break;
}
- ss = (struct line_subseg *) xmalloc (sizeof (*ss));
- ss->next = *pss;
- ss->subseg = subseg;
- ss->head = NULL;
- ss->ptail = &ss->head;
- *pss = ss;
+ lss = (struct line_subseg *) xmalloc (sizeof (*lss));
+ lss->next = *pss;
+ lss->subseg = subseg;
+ lss->head = NULL;
+ lss->ptail = &lss->head;
+ *pss = lss;
found_subseg:
last_seg = seg;
last_subseg = subseg;
- last_line_subseg = ss;
+ last_line_subseg = lss;
- return ss;
+ return lss;
}
-/* Record an entry for LOC occurring at LABEL. */
+/* Push LOC onto the pending lines list. */
static void
-dwarf2_gen_line_info_1 (symbolS *label, struct dwarf2_line_info *loc)
+dwarf2_push_line (struct dwarf2_line_info *loc)
{
- struct line_subseg *ss;
struct line_entry *e;
e = (struct line_entry *) xmalloc (sizeof (*e));
e->next = NULL;
- e->label = label;
+ e->label = NULL;
e->loc = *loc;
- ss = get_line_subseg (now_seg, now_subseg);
- *ss->ptail = e;
- ss->ptail = &e->next;
+ *pending_lines_tail = e;
+ pending_lines_tail = &(*pending_lines_tail)->next;
+}
+
+/* Emit all pending line information. LABEL is the label with which the
+ lines should be associated, or null if they should be associated with
+ the current position. */
+
+static void
+dwarf2_flush_pending_lines (symbolS *label)
+{
+ if (pending_lines)
+ {
+ struct line_subseg *lss;
+ struct line_entry *e;
+
+ if (!label)
+ label = symbol_temp_new_now ();
+
+ for (e = pending_lines; e; e = e->next)
+ e->label = label;
+
+ lss = get_line_subseg (now_seg, now_subseg);
+ *lss->ptail = pending_lines;
+ lss->ptail = pending_lines_tail;
+
+ pending_lines = NULL;
+ pending_lines_tail = &pending_lines;
+ }
}
/* Record an entry for LOC occurring at OFS within the current fragment. */
static unsigned int line = -1;
static unsigned int filenum = -1;
- symbolS *sym;
-
/* Early out for as-yet incomplete location information. */
if (loc->filenum == 0 || loc->line == 0)
return;
line = loc->line;
filenum = loc->filenum;
- sym = symbol_temp_new (now_seg, ofs, frag_now);
- dwarf2_gen_line_info_1 (sym, loc);
+ dwarf2_push_line (loc);
+ if (linkrelax)
+ {
+ char name[120];
+
+ /* Use a non-fake name for the line number location,
+ so that it can be referred to by relocations. */
+ sprintf (name, ".Loc.%u.%u", line, filenum);
+ dwarf2_flush_pending_lines (symbol_new (name, now_seg, ofs, frag_now));
+ }
+ else
+ dwarf2_flush_pending_lines (symbol_temp_new (now_seg, ofs, frag_now));
}
/* Returns the current source information. If .file directives have
line->column = 0;
line->flags = DWARF2_FLAG_IS_STMT;
line->isa = current.isa;
+ line->discriminator = current.discriminator;
}
else
*line = current;
void
dwarf2_consume_line_info (void)
{
+ /* If the consumer has stashed the current location away for later use,
+ assume that any earlier location information should be associated
+ with ".". */
+ dwarf2_flush_pending_lines (NULL);
+
/* Unless we generate DWARF2 debugging information for each
assembler line, we only emit one line symbol for one LOC. */
dwarf2_loc_directive_seen = FALSE;
current.flags &= ~(DWARF2_FLAG_BASIC_BLOCK
| DWARF2_FLAG_PROLOGUE_END
| DWARF2_FLAG_EPILOGUE_BEGIN);
+ current.discriminator = 0;
}
/* Called for each (preferably code) label. If dwarf2_loc_mark_labels
loc.flags |= DWARF2_FLAG_BASIC_BLOCK;
- dwarf2_gen_line_info_1 (label, &loc);
+ dwarf2_push_line (&loc);
+ dwarf2_flush_pending_lines (label);
dwarf2_consume_line_info ();
}
if (num == 0 && last_used)
{
if (! files[last_used].dir
- && strcmp (filename, files[last_used].filename) == 0)
+ && filename_cmp (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
+ && filename_ncmp (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)
+ && filename_cmp (filename + last_used_dir_len + 1,
+ files[last_used].filename) == 0)
return last_used;
}
dir = 0;
if (dir_len)
{
+#ifndef DWARF2_DIR_SHOULD_END_WITH_SEPARATOR
--dir_len;
+#endif
for (dir = 1; dir < dirs_in_use; ++dir)
- if (strncmp (filename, dirs[dir], dir_len) == 0
+ if (filename_ncmp (filename, dirs[dir], dir_len) == 0
&& dirs[dir][dir_len] == '\0')
break;
xrealloc (dirs, (dir + 32) * sizeof (const char *));
}
- dirs[dir] = xmalloc (dir_len + 1);
+ dirs[dir] = (char *) xmalloc (dir_len + 1);
memcpy (dirs[dir], filename, dir_len);
dirs[dir][dir_len] = '\0';
dirs_in_use = dir + 1;
for (i = 1; i < files_in_use; ++i)
if (files[i].dir == dir
&& files[i].filename
- && strcmp (file, files[i].filename) == 0)
+ && filename_cmp (file, files[i].filename) == 0)
{
last_used = i;
last_used_dir_len = dir_len;
return NULL;
}
+ /* A .file directive implies compiler generated debug information is
+ being supplied. Turn off gas generated debug info. */
+ debug_type = DEBUG_NONE;
+
if (num < (int) files_in_use && files[num].filename != 0)
{
as_bad (_("file number %ld already allocated"), (long) num);
/* If we see two .loc directives in a row, force the first one to be
output now. */
- if (dwarf2_loc_directive_seen && debug_type != DEBUG_DWARF2)
- dwarf2_emit_insn (0);
+ if (dwarf2_loc_directive_seen)
+ dwarf2_push_line (¤t);
filenum = get_absolute_expression ();
SKIP_WHITESPACE ();
current.filenum = filenum;
current.line = line;
+ current.discriminator = 0;
#ifndef NO_LISTING
if (listing)
return;
}
}
+ else if (strcmp (p, "discriminator") == 0)
+ {
+ *input_line_pointer = c;
+ value = get_absolute_expression ();
+ if (value >= 0)
+ current.discriminator = value;
+ else
+ {
+ as_bad (_("discriminator less than zero"));
+ return;
+ }
+ }
else
{
as_bad (_("unknown .loc sub-directive `%s'"), p);
demand_empty_rest_of_line ();
dwarf2_loc_directive_seen = TRUE;
+ debug_type = DEBUG_NONE;
}
void
output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
}
+/* Emit a signed "little-endian base 128" number. */
+
+static void
+out_leb128 (addressT value)
+{
+ output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
+}
+
/* Emit a tuple for .debug_abbrev. */
static inline void
static void
out_set_addr (symbolS *sym)
{
- expressionS expr;
+ expressionS exp;
out_opcode (DW_LNS_extended_op);
out_uleb128 (sizeof_address + 1);
out_opcode (DW_LNE_set_address);
- expr.X_op = O_symbol;
- expr.X_add_symbol = sym;
- expr.X_add_number = 0;
- emit_expr (&expr, sizeof_address);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = sym;
+ exp.X_add_number = 0;
+ emit_expr (&exp, sizeof_address);
}
-#if DWARF2_LINE_MIN_INSN_LENGTH > 1
static void scale_addr_delta (addressT *);
static void
scale_addr_delta (addressT *addr_delta)
{
static int printed_this = 0;
- if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0)
+ if (DWARF2_LINE_MIN_INSN_LENGTH > 1)
{
- if (!printed_this)
- as_bad("unaligned opcodes detected in executable segment");
- printed_this = 1;
+ if (*addr_delta % DWARF2_LINE_MIN_INSN_LENGTH != 0 && !printed_this)
+ {
+ as_bad("unaligned opcodes detected in executable segment");
+ printed_this = 1;
+ }
+ *addr_delta /= DWARF2_LINE_MIN_INSN_LENGTH;
}
- *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.
/* Line number sequences cannot go backward in addresses. This means
we've incorrectly ordered the statements in the sequence. */
- assert ((offsetT) addr_delta >= 0);
+ gas_assert ((offsetT) addr_delta >= 0);
/* Scale the address delta by the minimum instruction length. */
scale_addr_delta (&addr_delta);
*p++ = tmp;
done:
- assert (p == end);
+ gas_assert (p == end);
}
/* Handy routine to combine calls to the above two routines. */
line and address information, but it is required if linker relaxation
could change the code offsets. The following two routines *must* be
kept in sync. */
+#define ADDR_DELTA_LIMIT 50000
static int
size_fixed_inc_line_addr (int line_delta, addressT addr_delta)
if (line_delta != INT_MAX)
len = 1 + sizeof_leb128 (line_delta, 1);
- if (addr_delta > 50000)
+ if (addr_delta > ADDR_DELTA_LIMIT)
{
/* DW_LNS_extended_op */
len += 1 + sizeof_leb128 (sizeof_address + 1, 0);
emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag,
char *p, int len)
{
- expressionS *exp;
+ expressionS *pexp;
segT line_seg;
char *end = p + len;
/* Line number sequences cannot go backward in addresses. This means
we've incorrectly ordered the statements in the sequence. */
- assert ((offsetT) addr_delta >= 0);
+ gas_assert ((offsetT) addr_delta >= 0);
/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
if (line_delta != INT_MAX)
p += output_leb128 (p, line_delta, 1);
}
- exp = symbol_get_value_expression (frag->fr_symbol);
+ pexp = symbol_get_value_expression (frag->fr_symbol);
line_seg = subseg_get (".debug_line", 0);
/* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can
which this function would not be used) could change the operand by
an unknown amount. If the address increment is getting close to
the limit, just reset the address. */
- if (addr_delta > 50000)
+ if (addr_delta > ADDR_DELTA_LIMIT)
{
symbolS *to_sym;
- expressionS expr;
+ expressionS exp;
- assert (exp->X_op = O_subtract);
- to_sym = exp->X_add_symbol;
+ gas_assert (pexp->X_op == O_subtract);
+ to_sym = pexp->X_add_symbol;
*p++ = DW_LNS_extended_op;
p += output_leb128 (p, sizeof_address + 1, 0);
*p++ = DW_LNE_set_address;
- expr.X_op = O_symbol;
- expr.X_add_symbol = to_sym;
- expr.X_add_number = 0;
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = to_sym;
+ exp.X_add_number = 0;
subseg_change (line_seg, 0);
- emit_expr_fix (&expr, sizeof_address, frag, p);
+ emit_expr_fix (&exp, sizeof_address, frag, p);
p += sizeof_address;
}
else
{
*p++ = DW_LNS_fixed_advance_pc;
subseg_change (line_seg, 0);
- emit_expr_fix (exp, 2, frag, p);
+ emit_expr_fix (pexp, 2, frag, p);
p += 2;
}
else
*p++ = DW_LNS_copy;
- assert (p == end);
+ gas_assert (p == end);
}
/* Generate a variant frag that we can use to relax address/line
static void
relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
{
- expressionS expr;
+ expressionS exp;
int max_chars;
- expr.X_op = O_subtract;
- expr.X_add_symbol = to_sym;
- expr.X_op_symbol = from_sym;
- expr.X_add_number = 0;
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = to_sym;
+ exp.X_op_symbol = from_sym;
+ exp.X_add_number = 0;
/* The maximum size of the frag is the line delta with a maximum
sized address delta. */
max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH);
frag_var (rs_dwarf2dbg, max_chars, max_chars, 1,
- make_expr_symbol (&expr), line_delta, NULL);
+ make_expr_symbol (&exp), line_delta, NULL);
}
/* The function estimates the size of a rs_dwarf2dbg variant frag
{
offsetT addr_diff;
- addr_diff = resolve_symbol_value (frag->fr_symbol);
+ if (DWARF2_USE_FIXED_ADVANCE_PC)
+ {
+ /* If linker relaxation is enabled then the distance bewteen 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
+ emit_fixed_inc_line_addr to create a fixup (which later becomes a
+ relocation) that will allow the linker to correctly compute the
+ actual address difference. We have to use a fixed line advance for
+ this as we cannot (easily) relocate leb128 encoded values. */
+ int saved_finalize_syms = finalize_syms;
+
+ finalize_syms = 0;
+ addr_diff = resolve_symbol_value (frag->fr_symbol);
+ finalize_syms = saved_finalize_syms;
+ }
+ else
+ addr_diff = resolve_symbol_value (frag->fr_symbol);
/* fr_var carries the max_chars that we created the fragment with.
fr_subtype carries the current expected length. We must, of
course, have allocated enough memory earlier. */
- assert (frag->fr_var >= (int) frag->fr_subtype);
+ gas_assert (frag->fr_var >= (int) frag->fr_subtype);
if (DWARF2_USE_FIXED_ADVANCE_PC)
emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag,
out_uleb128 (column);
}
+ if (e->loc.discriminator != 0)
+ {
+ out_opcode (DW_LNS_extended_op);
+ out_leb128 (1 + sizeof_leb128 (e->loc.discriminator, 0));
+ out_opcode (DW_LNE_set_discriminator);
+ out_uleb128 (e->loc.discriminator);
+ }
+
if (isa != e->loc.isa)
{
isa = e->loc.isa;
for (i = 1; i < files_in_use; ++i)
{
+ const char *fullfilename;
+
if (files[i].filename == NULL)
{
as_bad (_("unassigned file number %ld"), (long) i);
continue;
}
- size = strlen (files[i].filename) + 1;
+ fullfilename = DWARF2_FILE_NAME (files[i].filename,
+ files[i].dir ? dirs [files [i].dir] : "");
+ size = strlen (fullfilename) + 1;
cp = frag_more (size);
- memcpy (cp, files[i].filename, size);
+ memcpy (cp, fullfilename, size);
out_uleb128 (files[i].dir); /* directory number */
- out_uleb128 (0); /* last modification timestamp */
- out_uleb128 (0); /* filesize */
+ /* Output the last modification timestamp. */
+ out_uleb128 (DWARF2_FILE_TIME_NAME (files[i].filename,
+ files[i].dir ? dirs [files [i].dir] : ""));
+ /* Output the filesize. */
+ out_uleb128 (DWARF2_FILE_SIZE_NAME (files[i].filename,
+ files[i].dir ? dirs [files [i].dir] : ""));
}
/* Terminate filename list. */
out_byte (0);
}
+/* 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. */
+
+static int
+out_header (asection *sec, expressionS *exp)
+{
+ symbolS *start_sym;
+ symbolS *end_sym;
+
+ subseg_set (sec, 0);
+ start_sym = symbol_temp_new_now ();;
+ end_sym = symbol_temp_make ();
+
+ /* Total length of the information. */
+ exp->X_op = O_subtract;
+ exp->X_add_symbol = end_sym;
+ exp->X_op_symbol = start_sym;
+
+ switch (DWARF2_FORMAT (sec))
+ {
+ case dwarf2_format_32bit:
+ exp->X_add_number = -4;
+ emit_expr (exp, 4);
+ return 4;
+
+ case dwarf2_format_64bit:
+ exp->X_add_number = -12;
+ out_four (-1);
+ emit_expr (exp, 8);
+ return 8;
+
+ case dwarf2_format_64bit_irix:
+ exp->X_add_number = -8;
+ emit_expr (exp, 8);
+ return 8;
+ }
+
+ as_fatal (_("internal error: unknown dwarf2 format"));
+ return 0;
+}
+
/* Emit the collected .debug_line data. */
static void
out_debug_line (segT line_seg)
{
- expressionS expr;
- symbolS *line_start;
+ expressionS exp;
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_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;
-
- 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"));
- }
+ sizeof_offset = out_header (line_seg, &exp);
+ line_end = exp.X_add_symbol;
/* Version. */
- out_two (2);
+ out_two (DWARF2_LINE_VERSION);
/* Length of the prologue following this length. */
- expr.X_op = O_subtract;
- expr.X_add_symbol = prologue_end;
- expr.X_op_symbol = line_start;
- expr.X_add_number = - (4 + 2 + 4);
- emit_expr (&expr, sizeof_offset);
+ prologue_end = symbol_temp_make ();
+ exp.X_add_symbol = prologue_end;
+ exp.X_add_number = - (4 + 2 + 4);
+ emit_expr (&exp, sizeof_offset);
/* Parameters of the state machine. */
out_byte (DWARF2_LINE_MIN_INSN_LENGTH);
/* For each section, emit a statement program. */
for (s = all_segs; s; s = s->next)
- process_entries (s->seg, s->head->head);
+ if (SEG_NORMAL (s->seg))
+ process_entries (s->seg, s->head->head);
+ else
+ as_warn ("dwarf line number information for %s ignored",
+ segment_name (s->seg));
symbol_set_value_now (line_end);
}
{
unsigned int addr_size = sizeof_address;
struct line_seg *s;
- expressionS expr;
+ expressionS exp;
unsigned int i;
subseg_set (ranges_seg, 0);
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
s->text_end = end;
- expr.X_op = O_symbol;
- expr.X_add_symbol = beg;
- expr.X_add_number = 0;
- emit_expr (&expr, addr_size);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = beg;
+ exp.X_add_number = 0;
+ emit_expr (&exp, addr_size);
- expr.X_op = O_symbol;
- expr.X_add_symbol = end;
- expr.X_add_number = 0;
- emit_expr (&expr, addr_size);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = end;
+ exp.X_add_number = 0;
+ emit_expr (&exp, addr_size);
}
/* End of Range Entry. */
out_debug_aranges (segT aranges_seg, segT info_seg)
{
unsigned int addr_size = sizeof_address;
- addressT size, skip;
struct line_seg *s;
- expressionS expr;
+ expressionS exp;
+ symbolS *aranges_end;
char *p;
+ int sizeof_offset;
- size = 4 + 2 + 4 + 1 + 1;
-
- skip = 2 * addr_size - (size & (2 * addr_size - 1));
- if (skip == 2 * addr_size)
- skip = 0;
- size += skip;
-
- for (s = all_segs; s; s = s->next)
- size += 2 * addr_size;
-
- size += 2 * addr_size;
-
- subseg_set (aranges_seg, 0);
-
- /* Length of the compilation unit. */
- out_four (size - 4);
+ sizeof_offset = out_header (aranges_seg, &exp);
+ aranges_end = exp.X_add_symbol;
/* Version. */
- out_two (2);
+ out_two (DWARF2_ARANGES_VERSION);
/* Offset to .debug_info. */
- /* ??? sizeof_offset */
- TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4);
+ TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);
/* Size of an address (offset portion). */
out_byte (addr_size);
out_byte (0);
/* Align the header. */
- if (skip)
- frag_align (ffs (2 * addr_size) - 1, 0, 0);
+ frag_align (ffs (2 * addr_size) - 1, 0, 0);
for (s = all_segs; s; s = s->next)
{
end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
s->text_end = end;
- expr.X_op = O_symbol;
- expr.X_add_symbol = beg;
- expr.X_add_number = 0;
- emit_expr (&expr, addr_size);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = beg;
+ exp.X_add_number = 0;
+ emit_expr (&exp, addr_size);
- expr.X_op = O_subtract;
- expr.X_add_symbol = end;
- expr.X_op_symbol = beg;
- expr.X_add_number = 0;
- emit_expr (&expr, addr_size);
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = end;
+ exp.X_op_symbol = beg;
+ exp.X_add_number = 0;
+ emit_expr (&exp, addr_size);
}
p = frag_more (2 * addr_size);
md_number_to_chars (p, 0, addr_size);
md_number_to_chars (p + addr_size, 0, addr_size);
+
+ symbol_set_value_now (aranges_end);
}
/* Emit data for .debug_abbrev. Note that this must be kept in
sync with out_debug_info below. */
static void
-out_debug_abbrev (segT abbrev_seg)
+out_debug_abbrev (segT abbrev_seg,
+ segT info_seg ATTRIBUTE_UNUSED,
+ segT line_seg ATTRIBUTE_UNUSED)
{
subseg_set (abbrev_seg, 0);
out_uleb128 (1);
out_uleb128 (DW_TAG_compile_unit);
out_byte (DW_CHILDREN_no);
- out_abbrev (DW_AT_stmt_list, DW_FORM_data4);
+ if (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit)
+ out_abbrev (DW_AT_stmt_list, DW_FORM_data4);
+ else
+ out_abbrev (DW_AT_stmt_list, DW_FORM_data8);
if (all_segs->next == NULL)
{
out_abbrev (DW_AT_low_pc, DW_FORM_addr);
- out_abbrev (DW_AT_high_pc, DW_FORM_addr);
+ if (DWARF2_VERSION < 4)
+ out_abbrev (DW_AT_high_pc, DW_FORM_addr);
+ else
+ out_abbrev (DW_AT_high_pc, (sizeof_address == 4
+ ? DW_FORM_data4 : DW_FORM_data8));
}
else
{
- if (DWARF2_FORMAT () == dwarf2_format_32bit)
+ if (DWARF2_FORMAT (info_seg) == dwarf2_format_32bit)
out_abbrev (DW_AT_ranges, DW_FORM_data4);
else
out_abbrev (DW_AT_ranges, DW_FORM_data8);
char producer[128];
const char *comp_dir;
const char *dirname;
- expressionS expr;
- symbolS *info_start;
+ expressionS exp;
symbolS *info_end;
char *p;
int len;
- enum dwarf2_format d2f;
int sizeof_offset;
- subseg_set (info_seg, 0);
-
- 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;
-
- 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"));
- }
+ sizeof_offset = out_header (info_seg, &exp);
+ info_end = exp.X_add_symbol;
/* DWARF version. */
- out_two (2);
+ out_two (DWARF2_VERSION);
/* .debug_abbrev offset */
TC_DWARF2_EMIT_OFFSET (section_symbol (abbrev_seg), sizeof_offset);
out_uleb128 (1);
/* DW_AT_stmt_list */
- /* ??? sizeof_offset */
- TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg), 4);
+ TC_DWARF2_EMIT_OFFSET (section_symbol (line_seg),
+ (DWARF2_FORMAT (line_seg) == dwarf2_format_32bit
+ ? 4 : 8));
/* These two attributes are emitted if all of the code is contiguous. */
if (all_segs->next == NULL)
{
/* DW_AT_low_pc */
- expr.X_op = O_symbol;
- expr.X_add_symbol = all_segs->text_start;
- expr.X_add_number = 0;
- emit_expr (&expr, sizeof_address);
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = all_segs->text_start;
+ exp.X_add_number = 0;
+ emit_expr (&exp, sizeof_address);
/* DW_AT_high_pc */
- expr.X_op = O_symbol;
- expr.X_add_symbol = all_segs->text_end;
- expr.X_add_number = 0;
- emit_expr (&expr, sizeof_address);
+ if (DWARF2_VERSION < 4)
+ exp.X_op = O_symbol;
+ else
+ {
+ exp.X_op = O_subtract;
+ exp.X_op_symbol = all_segs->text_start;
+ }
+ exp.X_add_symbol = all_segs->text_end;
+ exp.X_add_number = 0;
+ emit_expr (&exp, sizeof_address);
}
else
{
{
dirname = remap_debug_filename (dirs[files[1].dir]);
len = strlen (dirname);
+#ifdef TE_VMS
+ /* Already has trailing slash. */
+ p = frag_more (len);
+ memcpy (p, dirname, len);
+#else
p = frag_more (len + 1);
memcpy (p, dirname, len);
INSERT_DIR_SEPARATOR (p, len);
+#endif
}
len = strlen (files[1].filename) + 1;
p = frag_more (len);
symbol_set_value_now (info_end);
}
+void
+dwarf2_init (void)
+{
+ all_segs_hash = hash_new ();
+ last_seg_ptr = &all_segs;
+}
+
+
/* Finish the dwarf2 debug sections. We emit .debug.line if there
were any .file/.loc directives, or --gdwarf2 was given, or if the
- file has a non-empty .debug_info section. If we emit .debug_line,
- and the .debug_info section is empty, we also emit .debug_info,
- .debug_aranges and .debug_abbrev. ALL_SEGS will be non-null if
- there were any .file/.loc directives, or --gdwarf2 was given and
- there were any located instructions emitted. */
+ file has a non-empty .debug_info section and an empty .debug_line
+ section. If we emit .debug_line, and the .debug_info section is
+ empty, we also emit .debug_info, .debug_aranges and .debug_abbrev.
+ ALL_SEGS will be non-null if there were any .file/.loc directives,
+ or --gdwarf2 was given and there were any located instructions
+ emitted. */
void
dwarf2_finish (void)
struct line_seg *s;
segT info_seg;
int emit_other_sections = 0;
+ int empty_debug_line = 0;
info_seg = bfd_get_section_by_name (stdoutput, ".debug_info");
emit_other_sections = info_seg == NULL || !seg_not_empty_p (info_seg);
- if (!all_segs && emit_other_sections)
- /* There is no line information and no non-empty .debug_info
- section. */
+ line_seg = bfd_get_section_by_name (stdoutput, ".debug_line");
+ empty_debug_line = line_seg == NULL || !seg_not_empty_p (line_seg);
+
+ /* We can't construct a new debug_line section if we already have one.
+ Give an error. */
+ if (all_segs && !empty_debug_line)
+ as_fatal ("duplicate .debug_line sections");
+
+ if ((!all_segs && emit_other_sections)
+ || (!emit_other_sections && !empty_debug_line))
+ /* If there is no line information and no non-empty .debug_info
+ section, or if there is both a non-empty .debug_info and a non-empty
+ .debug_line, then we do nothing. */
return;
/* Calculate the size of an address for the target machine. */
/* For each subsection, chain the debug entries together. */
for (s = all_segs; s; s = s->next)
{
- struct line_subseg *ss = s->head;
- struct line_entry **ptail = ss->ptail;
+ struct line_subseg *lss = s->head;
+ struct line_entry **ptail = lss->ptail;
- while ((ss = ss->next) != NULL)
+ while ((lss = lss->next) != NULL)
{
- *ptail = ss->head;
- ptail = ss->ptail;
+ *ptail = lss->head;
+ ptail = lss->ptail;
}
}
segT aranges_seg;
segT ranges_seg;
- assert (all_segs);
+ gas_assert (all_segs);
info_seg = subseg_new (".debug_info", 0);
abbrev_seg = subseg_new (".debug_abbrev", 0);
}
out_debug_aranges (aranges_seg, info_seg);
- out_debug_abbrev (abbrev_seg);
+ out_debug_abbrev (abbrev_seg, info_seg, line_seg);
out_debug_info (info_seg, abbrev_seg, line_seg, ranges_seg);
}
}
projects / binutils.git / blobdiff