예제 #1
0
static void
out_debug_aranges (segT aranges_seg, segT info_seg)
{
  unsigned int addr_size = sizeof_address;
  struct line_seg *s;
  expressionS exp;
  symbolS *aranges_end;
  char *p;
  int sizeof_offset;

  sizeof_offset = out_header (aranges_seg, &exp);
  aranges_end = exp.X_add_symbol;

  /* Version.  */
  out_two (DWARF2_VERSION);

  /* Offset to .debug_info.  */
  TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), sizeof_offset);

  /* Size of an address (offset portion).  */
  out_byte (addr_size);

  /* Size of a segment descriptor.  */
  out_byte (0);

  /* Align the header.  */
  frag_align (ffs (2 * addr_size) - 1, 0, 0);

  for (s = all_segs; s; s = s->next)
    {
      fragS *frag;
      symbolS *beg, *end;

      frag = first_frag_for_seg (s->seg);
      beg = symbol_temp_new (s->seg, 0, frag);
      s->text_start = beg;

      frag = last_frag_for_seg (s->seg);
      end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
      s->text_end = end;

      exp.X_op = O_symbol;
      exp.X_add_symbol = beg;
      exp.X_add_number = 0;
      emit_expr (&exp, 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);
}
예제 #2
0
static void
out_debug_ranges (segT ranges_seg)
{
  unsigned int addr_size = sizeof_address;
  struct line_seg *s;
  expressionS exp;
  unsigned int i;

  subseg_set (ranges_seg, 0);

  /* Base Address Entry.  */
  for (i = 0; i < addr_size; i++)
    out_byte (0xff);
  for (i = 0; i < addr_size; i++)
    out_byte (0);

  /* Range List Entry.  */
  for (s = all_segs; s; s = s->next)
    {
      fragS *frag;
      symbolS *beg, *end;

      frag = first_frag_for_seg (s->seg);
      beg = symbol_temp_new (s->seg, 0, frag);
      s->text_start = beg;

      frag = last_frag_for_seg (s->seg);
      end = symbol_temp_new (s->seg, get_frag_fix (frag, s->seg), frag);
      s->text_end = end;

      exp.X_op = O_symbol;
      exp.X_add_symbol = beg;
      exp.X_add_number = 0;
      emit_expr (&exp, 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.   */
  for (i = 0; i < addr_size; i++)
    out_byte (0);
  for (i = 0; i < addr_size; i++)
    out_byte (0);
}
예제 #3
0
static void
process_entries (segT seg, struct line_entry *e)
{
  unsigned filenum = 1;
  unsigned line = 1;
  unsigned column = 0;
  unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_BEGIN_STMT : 0;
  fragS *frag = NULL;
  fragS *last_frag;
  addressT frag_ofs = 0;
  addressT last_frag_ofs;
  struct line_entry *next;

  while (e)
    {
      int changed = 0;

      if (filenum != e->loc.filenum)
	{
	  filenum = e->loc.filenum;
	  out_opcode (DW_LNS_set_file);
	  out_uleb128 (filenum);
	  changed = 1;
	}

      if (column != e->loc.column)
	{
	  column = e->loc.column;
	  out_opcode (DW_LNS_set_column);
	  out_uleb128 (column);
	  changed = 1;
	}

      if ((e->loc.flags ^ flags) & DWARF2_FLAG_BEGIN_STMT)
	{
	  flags = e->loc.flags;
	  out_opcode (DW_LNS_negate_stmt);
	  changed = 1;
	}

      if (e->loc.flags & DWARF2_FLAG_BEGIN_BLOCK)
	{
	  out_opcode (DW_LNS_set_basic_block);
	  changed = 1;
	}

      /* Don't try to optimize away redundant entries; gdb wants two
	 entries for a function where the code starts on the same line as
	 the {, and there's no way to identify that case here.  Trust gcc
	 to optimize appropriately.  */
      if (1 /* line != e->loc.line || changed */)
	{
	  int line_delta = e->loc.line - line;
	  if (frag == NULL)
	    {
	      out_set_addr (seg, e->frag, e->frag_ofs);
	      out_inc_line_addr (line_delta, 0);
	    }
	  else if (frag == e->frag)
	    out_inc_line_addr (line_delta, e->frag_ofs - frag_ofs);
	  else
	    relax_inc_line_addr (line_delta, seg, e->frag, e->frag_ofs,
				 frag, frag_ofs);

	  frag = e->frag;
	  frag_ofs = e->frag_ofs;
	  line = e->loc.line;
	}
      else if (frag == NULL)
	{
	  out_set_addr (seg, e->frag, e->frag_ofs);
	  frag = e->frag;
	  frag_ofs = e->frag_ofs;
	}

      next = e->next;
      free (e);
      e = next;
    }

  /* Emit a DW_LNE_end_sequence for the end of the section.  */
  last_frag = last_frag_for_seg (seg);
  last_frag_ofs = get_frag_fix (last_frag);
  if (frag == last_frag)
    out_inc_line_addr (INT_MAX, last_frag_ofs - frag_ofs);
  else
    relax_inc_line_addr (INT_MAX, seg, last_frag, last_frag_ofs,
			 frag, frag_ofs);
}
예제 #4
0
static void
process_entries (segT seg, struct line_entry *e)
{
  unsigned filenum = 1;
  unsigned line = 1;
  unsigned column = 0;
  unsigned isa = 0;
  unsigned flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
  fragS *last_frag = NULL, *frag;
  addressT last_frag_ofs = 0, frag_ofs;
  symbolS *last_lab = NULL, *lab;
  struct line_entry *next;

  do
    {
      int line_delta;

      if (filenum != e->loc.filenum)
	{
	  filenum = e->loc.filenum;
	  out_opcode (DW_LNS_set_file);
	  out_uleb128 (filenum);
	}

      if (column != e->loc.column)
	{
	  column = e->loc.column;
	  out_opcode (DW_LNS_set_column);
	  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;
	  out_opcode (DW_LNS_set_isa);
	  out_uleb128 (isa);
	}

      if ((e->loc.flags ^ flags) & DWARF2_FLAG_IS_STMT)
	{
	  flags = e->loc.flags;
	  out_opcode (DW_LNS_negate_stmt);
	}

      if (e->loc.flags & DWARF2_FLAG_BASIC_BLOCK)
	out_opcode (DW_LNS_set_basic_block);

      if (e->loc.flags & DWARF2_FLAG_PROLOGUE_END)
	out_opcode (DW_LNS_set_prologue_end);

      if (e->loc.flags & DWARF2_FLAG_EPILOGUE_BEGIN)
	out_opcode (DW_LNS_set_epilogue_begin);

      /* Don't try to optimize away redundant entries; gdb wants two
	 entries for a function where the code starts on the same line as
	 the {, and there's no way to identify that case here.  Trust gcc
	 to optimize appropriately.  */
      line_delta = e->loc.line - line;
      lab = e->label;
      frag = symbol_get_frag (lab);
      frag_ofs = S_GET_VALUE (lab);

      if (last_frag == NULL)
	{
	  out_set_addr (lab);
	  out_inc_line_addr (line_delta, 0);
	}
      else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
	out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs);
      else
	relax_inc_line_addr (line_delta, lab, last_lab);

      line = e->loc.line;
      last_lab = lab;
      last_frag = frag;
      last_frag_ofs = frag_ofs;

      next = e->next;
      free (e);
      e = next;
    }
  while (e);

  /* Emit a DW_LNE_end_sequence for the end of the section.  */
  frag = last_frag_for_seg (seg);
  frag_ofs = get_frag_fix (frag, seg);
  if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
    out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs);
  else
    {
      lab = symbol_temp_new (seg, frag_ofs, frag);
      relax_inc_line_addr (INT_MAX, lab, last_lab);
    }
}
예제 #5
0
static void
out_debug_aranges (segT aranges_seg, segT info_seg)
{
  unsigned int addr_size = sizeof_address;
  addressT size, skip;
  struct line_seg *s;
  expressionS expr;
  char *p;

  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);

  /* Version.  */
  out_two (2);

  /* Offset to .debug_info.  */
  /* ??? sizeof_offset */
  TC_DWARF2_EMIT_OFFSET (section_symbol (info_seg), 4);

  /* Size of an address (offset portion).  */
  out_byte (addr_size);

  /* Size of a segment descriptor.  */
  out_byte (0);

  /* Align the header.  */
  if (skip)
    frag_align (ffs (2 * addr_size) - 1, 0, 0);

  for (s = all_segs; s; s = s->next)
    {
      fragS *frag;
      symbolS *beg, *end;

      frag = first_frag_for_seg (s->seg);
      beg = symbol_temp_new (s->seg, 0, frag);
      s->text_start = beg;

      frag = last_frag_for_seg (s->seg);
      end = symbol_temp_new (s->seg, get_frag_fix (frag), 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);

      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);
    }

  p = frag_more (2 * addr_size);
  md_number_to_chars (p, 0, addr_size);
  md_number_to_chars (p + addr_size, 0, addr_size);
}