unwind_record r;
unsigned long slot_number;
fragS *slot_frag;
+ unsigned long next_slot_number;
+ fragS *next_slot_frag;
struct unw_rec_list *next;
} unw_rec_list;
static struct
{
- unsigned long next_slot_number;
- fragS *next_slot_frag;
-
/* Maintain a list of unwind entries for the current function. */
unw_rec_list *list;
unw_rec_list *tail;
static void output_X3_format PARAMS ((vbyte_func, unw_record_type, int, int, int, unsigned long,
unsigned long));
static void output_X4_format PARAMS ((vbyte_func, int, int, int, int, int, int, unsigned long));
-static void free_list_records PARAMS ((unw_rec_list *));
static unw_rec_list *output_prologue PARAMS ((void));
static unw_rec_list *output_prologue_gr PARAMS ((unsigned int, unsigned int));
static unw_rec_list *output_body PARAMS ((void));
unsigned long, fragS *));
static unw_rec_list *optimize_unw_records PARAMS ((unw_rec_list *));
static void fixup_unw_records PARAMS ((unw_rec_list *));
-static int output_unw_records PARAMS ((unw_rec_list *, void **));
static int convert_expr_to_ab_reg PARAMS ((expressionS *, unsigned int *, unsigned int *));
static int convert_expr_to_xy_reg PARAMS ((expressionS *, unsigned int *, unsigned int *));
-static int generate_unwind_image PARAMS ((const char *));
+static void generate_unwind_image PARAMS ((const char *));
static unsigned int get_saved_prologue_count PARAMS ((unsigned long));
static void save_prologue_count PARAMS ((unsigned long, unsigned int));
static void free_saved_prologue_counts PARAMS ((void));
ptr->next = NULL;
ptr->slot_number = SLOT_NUM_NOT_SET;
ptr->r.type = t;
+ ptr->next_slot_number = 0;
+ ptr->next_slot_frag = 0;
return ptr;
}
-/* This function frees an entire list of record structures. */
-
-void
-free_list_records (unw_rec_list *first)
-{
- unw_rec_list *ptr;
- for (ptr = first; ptr != NULL;)
- {
- unw_rec_list *tmp = ptr;
-
- if ((tmp->r.type == prologue || tmp->r.type == prologue_gr)
- && tmp->r.record.r.mask.i)
- free (tmp->r.record.r.mask.i);
-
- ptr = ptr->next;
- free (tmp);
- }
-}
-
static unw_rec_list *
output_prologue ()
{
{
unsigned long start_addr = (unsigned long) &first_frag->fr_literal;
+ if (finalize_syms)
+ {
+ /* We can get the final addresses only after relaxation is
+ done. */
+ if (first_frag->fr_next && first_frag->fr_next->fr_address)
+ index += 3 * ((first_frag->fr_next->fr_address
+ - first_frag->fr_address
+ - first_frag->fr_fix) >> 4);
+ }
+ else
+ /* We don't know what the final addresses will be. We try our
+ best to estimate. */
+ switch (first_frag->fr_type)
+ {
+ default:
+ break;
+
+ case rs_space:
+ as_fatal ("only constant space allocation is supported");
+ break;
+
+ case rs_align:
+ case rs_align_code:
+ case rs_align_test:
+ /* Take alignment into account. Assume the worst case
+ before relaxation. */
+ index += 3 * ((1 << first_frag->fr_offset) >> 4);
+ break;
+
+ case rs_org:
+ if (first_frag->fr_symbol)
+ {
+ as_fatal ("only constant offsets are supported");
+ break;
+ }
+ case rs_fill:
+ index += 3 * (first_frag->fr_offset >> 4);
+ break;
+ }
+
/* Add in the full size of the frag converted to instruction slots. */
index += 3 * (first_frag->fr_fix >> 4);
/* Subtract away the initial part before first_addr. */
first_addr = ptr->slot_number;
first_frag = ptr->slot_frag;
- ptr->slot_number = 0;
/* Find either the next body/prologue start, or the end of
the list, and determine the size of the region. */
- last_addr = unwind.next_slot_number;
- last_frag = unwind.next_slot_frag;
+ last_addr = list->next_slot_number;
+ last_frag = list->next_slot_frag;
for (last = ptr->next; last != NULL; last = last->next)
if (last->r.type == prologue || last->r.type == prologue_gr
|| last->r.type == body)
}
}
-/* Helper routine for output_unw_records. Emits the header for the unwind
- info. */
-
-static int
-setup_unwind_header (int size, unsigned char **mem)
+/* This function converts a rs_machine_dependent variant frag into a
+ normal fill frag with the unwind image from the the record list. */
+void
+ia64_convert_frag (fragS *frag)
{
- int x, extra = 0;
+ unw_rec_list *list;
+ int len, size, pad;
valueT flag_value;
- /* pad to pointer-size boundary. */
- x = size % md.pointer_size;
- if (x != 0)
- extra = md.pointer_size - x;
+ list = (unw_rec_list *) frag->fr_opcode;
+ fixup_unw_records (list);
- /* Add 8 for the header + a pointer for the
- personality offset. */
- *mem = xmalloc (size + extra + 8 + md.pointer_size);
+ len = calc_record_size (list);
+ /* pad to pointer-size boundary. */
+ pad = len % md.pointer_size;
+ if (pad != 0)
+ len += md.pointer_size - pad;
+ /* Add 8 for the header + a pointer for the personality offset. */
+ size = len + 8 + md.pointer_size;
- /* Clear the padding area and personality. */
- memset (*mem + 8 + size, 0, extra + md.pointer_size);
+ /* fr_var carries the max_chars that we created the fragment with.
+ We must, of course, have allocated enough memory earlier. */
+ assert (frag->fr_var >= size);
- /* Initialize the header area. */
- if (unwind.personality_routine)
+ /* Initialize the header area. fr_offset is initialized with
+ unwind.personality_routine. */
+ if (frag->fr_offset)
{
if (md.flags & EF_IA_64_ABI64)
flag_value = (bfd_vma) 3 << 32;
else
flag_value = 0;
- md_number_to_chars (*mem, (((bfd_vma) 1 << 48) /* Version. */
- | flag_value /* U & E handler flags. */
- | ((size + extra) / md.pointer_size)), /* Length. */
- 8);
+ md_number_to_chars (frag->fr_literal,
+ (((bfd_vma) 1 << 48) /* Version. */
+ | flag_value /* U & E handler flags. */
+ | (len / md.pointer_size)), /* Length. */
+ 8);
- return extra;
-}
-
-/* Generate an unwind image from a record list. Returns the number of
- bytes in the resulting image. The memory image itselof is returned
- in the 'ptr' parameter. */
-static int
-output_unw_records (list, ptr)
- unw_rec_list *list;
- void **ptr;
-{
- int size, extra;
- unsigned char *mem;
-
- *ptr = NULL;
-
- list = optimize_unw_records (list);
- fixup_unw_records (list);
- size = calc_record_size (list);
-
- if (size > 0 || unwind.force_unwind_entry)
- {
- unwind.force_unwind_entry = 0;
- extra = setup_unwind_header (size, &mem);
-
- vbyte_mem_ptr = mem + 8;
- process_unw_records (list, output_vbyte_mem);
-
- *ptr = mem;
-
- size += extra + 8 + md.pointer_size;
- }
- return size;
+ /* Skip the header. */
+ vbyte_mem_ptr = frag->fr_literal + 8;
+ process_unw_records (list, output_vbyte_mem);
+ frag->fr_fix += size;
+ frag->fr_type = rs_fill;
+ frag->fr_var = 0;
+ frag->fr_offset = 0;
}
static int
add_unwind_entry (output_spill_reg_p (ab, reg, 0, 0, qp));
}
-static int
+static void
generate_unwind_image (text_name)
const char *text_name;
{
- int size;
- void *unw_rec;
+ int size, pad;
+ unw_rec_list *list;
/* Force out pending instructions, to make sure all unwind records have
a valid slot_number field. */
ia64_flush_insns ();
/* Generate the unwind record. */
- size = output_unw_records (unwind.list, &unw_rec);
- if (size % md.pointer_size != 0)
- as_bad ("Unwind record is not a multiple of %d bytes.", md.pointer_size);
+ list = optimize_unw_records (unwind.list);
+ fixup_unw_records (list);
+ size = calc_record_size (list);
+
+ if (size > 0 || unwind.force_unwind_entry)
+ {
+ unwind.force_unwind_entry = 0;
+ /* pad to pointer-size boundary. */
+ pad = size % md.pointer_size;
+ if (pad != 0)
+ size += md.pointer_size - pad;
+ /* Add 8 for the header + a pointer for the personality
+ offset. */
+ size += 8 + md.pointer_size;
+ }
/* If there are unwind records, switch sections, and output the info. */
if (size != 0)
{
- unsigned char *where;
char *sec_name;
expressionS exp;
bfd_reloc_code_real_type reloc;
/* Set expression which points to start of unwind descriptor area. */
unwind.info = expr_build_dot ();
-
- where = (unsigned char *) frag_more (size);
-
- /* Issue a label for this address, and keep track of it to put it
- in the unwind section. */
-
- /* Copy the information from the unwind record into this section. The
- data is already in the correct byte order. */
- memcpy (where, unw_rec, size);
+
+ frag_var (rs_machine_dependent, size, size, 0, 0,
+ (offsetT) unwind.personality_routine, (char *) list);
/* Add the personality address to the image. */
if (unwind.personality_routine != 0)
}
}
- free_list_records (unwind.list);
free_saved_prologue_counts ();
unwind.list = unwind.tail = unwind.current_entry = NULL;
-
- return size;
}
static void
number_to_chars_littleendian (f + 0, t0, 8);
number_to_chars_littleendian (f + 8, t1, 8);
- unwind.next_slot_number = (unsigned long) f + 16;
- unwind.next_slot_frag = frag_now;
+ if (unwind.list)
+ {
+ unwind.list->next_slot_number = (unsigned long) f + 16;
+ unwind.list->next_slot_frag = frag_now;
+ }
}
int
projects / deliverable / binutils-gdb.git / commitdiff
