+2007-08-19 Joseph Myers <joseph@codesourcery.com>
+
+ * dwarf2out.c (text_section_used, cold_text_section_used,
+ cold_text_section, dwarf2out_note_section_used): New.
+ (dwarf2out_init): Initialize cold_text_section.
+ (dwarf2out_switch_text_section, dwarf2out_begin_function): Call
+ dwarf2out_note_section_used.
+ (size_of_aranges): Only count entry for text section if it was
+ used. Count entry for cold text section if it was used.
+ (output_aranges): Only output entries for text section and cold
+ text section if they were used.
+
2007-08-19 Andrew Pinski <pinskia@gmail.com>
* tree-pretty-print.c (debug_generic_expr): Add a comment about
#ifndef SEPARATE_LINE_CODE_LABEL
#define SEPARATE_LINE_CODE_LABEL "LSM"
#endif
+
+/* Whether the default text and cold text sections have been used at
+ all. */
+
+static GTY(()) bool text_section_used = false;
+static GTY(()) bool cold_text_section_used = false;
+
+/* The default cold text section. */
+static GTY(()) section *cold_text_section;
\f
/* We allow a language front-end to designate a function that is to be
called to "demangle" any name before it is put into a DIE. */
size = DWARF_ARANGES_HEADER_SIZE;
/* Count the address/length pair for this compilation unit. */
- size += 2 * DWARF2_ADDR_SIZE;
+ if (text_section_used)
+ size += 2 * DWARF2_ADDR_SIZE;
+ if (cold_text_section_used)
+ size += 2 * DWARF2_ADDR_SIZE;
size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use;
/* Count the two zero words used to terminated the address range table. */
*d = new_loc_list (descr, begin, end, section, 0);
}
+/* Note that the current function section is being used for code. */
+
+static void
+dwarf2out_note_section_used (void)
+{
+ section *sec = current_function_section ();
+ if (sec == text_section)
+ text_section_used = true;
+ else if (sec == cold_text_section)
+ cold_text_section_used = true;
+}
+
static void
dwarf2out_switch_text_section (void)
{
/* Reset the current label on switching text sections, so that we
don't attempt to advance_loc4 between labels in different sections. */
fde->dw_fde_current_label = NULL;
+
+ dwarf2out_note_section_used ();
}
/* Output the location list given to us. */
dw2_asm_output_data (2, 0, NULL);
}
- dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address");
- dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label,
- text_section_label, "Length");
- if (flag_reorder_blocks_and_partition)
+ /* It is necessary not to output these entries if the sections were
+ not used; if the sections were not used, the length will be 0 and
+ the address may end up as 0 if the section is discarded by ld
+ --gc-sections, leaving an invalid (0, 0) entry that can be
+ confused with the terminator. */
+ if (text_section_used)
+ {
+ dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address");
+ dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label,
+ text_section_label, "Length");
+ }
+ if (cold_text_section_used)
{
dw2_asm_output_addr (DWARF2_ADDR_SIZE, cold_text_section_label,
"Address");
if (function_section (fun) != text_section)
have_multiple_function_sections = true;
+
+ dwarf2out_note_section_used ();
}
/* Output a label to mark the beginning of a source code line entry
ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
if (flag_reorder_blocks_and_partition)
{
- switch_to_section (unlikely_text_section ());
+ cold_text_section = unlikely_text_section ();
+ switch_to_section (cold_text_section);
ASM_OUTPUT_LABEL (asm_out_file, cold_text_section_label);
}
}