# define tc_cfi_frame_initial_instructions() ((void)0)
#endif
+#ifndef DWARF2_ADDR_SIZE
+# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
+#endif
+
struct cfi_insn_data
{
struct cfi_escape_data *next;
expressionS exp;
} *esc;
+
+ struct {
+ unsigned reg, encoding;
+ expressionS exp;
+ } ea;
} u;
};
static void dot_cfi_endproc (int);
static void dot_cfi_personality (int);
static void dot_cfi_lsda (int);
+static void dot_cfi_val_encoded_addr (int);
/* Fake CFI type; outside the byte range of any real CFI insn. */
#define CFI_adjust_cfa_offset 0x100
#define CFI_rel_offset 0x102
#define CFI_escape 0x103
#define CFI_signal_frame 0x104
+#define CFI_val_encoded_addr 0x105
const pseudo_typeS cfi_pseudo_table[] =
{
{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
{ "cfi_personality", dot_cfi_personality, 0 },
{ "cfi_lsda", dot_cfi_lsda, 0 },
+ { "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 },
{ NULL, NULL, 0 }
};
}
fde = frchain_now->frch_cfi_data->cur_fde_data;
- encoding = get_absolute_expression ();
+ encoding = cfi_parse_const ();
if (encoding == DW_EH_PE_omit)
{
demand_empty_rest_of_line ();
}
fde = frchain_now->frch_cfi_data->cur_fde_data;
- encoding = get_absolute_expression ();
+ encoding = cfi_parse_const ();
if (encoding == DW_EH_PE_omit)
{
demand_empty_rest_of_line ();
demand_empty_rest_of_line ();
}
+static void
+dot_cfi_val_encoded_addr (int ignored ATTRIBUTE_UNUSED)
+{
+ struct cfi_insn_data *insn_ptr;
+ offsetT encoding;
+
+ if (frchain_now->frch_cfi_data == NULL)
+ {
+ as_bad (_("CFI instruction used without previous .cfi_startproc"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ /* If the last address was not at the current PC, advance to current. */
+ if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
+ || S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
+ != frag_now_fix ())
+ cfi_add_advance_loc (symbol_temp_new_now ());
+
+ insn_ptr = alloc_cfi_insn_data ();
+ insn_ptr->insn = CFI_val_encoded_addr;
+
+ insn_ptr->u.ea.reg = cfi_parse_reg ();
+
+ cfi_parse_separator ();
+ encoding = cfi_parse_const ();
+ if ((encoding & 0xff) != encoding
+ || ((encoding & 0x70) != 0
+#if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
+ && (encoding & 0x70) != DW_EH_PE_pcrel
+#endif
+ )
+ /* leb128 can be handled, but does something actually need it? */
+ || (encoding & 7) == DW_EH_PE_uleb128
+ || (encoding & 7) > DW_EH_PE_udata8)
+ {
+ as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
+ encoding = DW_EH_PE_omit;
+ }
+
+ cfi_parse_separator ();
+ expression_and_evaluate (&insn_ptr->u.ea.exp);
+ switch (insn_ptr->u.ea.exp.X_op)
+ {
+ case O_symbol:
+ break;
+ case O_constant:
+ if ((encoding & 0x70) != DW_EH_PE_pcrel)
+ break;
+ default:
+ encoding = DW_EH_PE_omit;
+ break;
+ }
+
+ insn_ptr->u.ea.encoding = encoding;
+ if (encoding == DW_EH_PE_omit)
+ {
+ as_bad (_("wrong third argument to .cfi_val_encoded_addr"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ demand_empty_rest_of_line ();
+}
+
static void
dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
{
break;
}
+ case CFI_val_encoded_addr:
+ {
+ unsigned encoding = insn->u.ea.encoding;
+ offsetT encoding_size;
+
+ if (encoding == DW_EH_PE_omit)
+ break;
+ out_one (DW_CFA_val_expression);
+ out_uleb128 (insn->u.ea.reg);
+
+ switch (encoding & 0x7)
+ {
+ case DW_EH_PE_absptr:
+ encoding_size = DWARF2_ADDR_SIZE (stdoutput);
+ break;
+ case DW_EH_PE_udata2:
+ encoding_size = 2;
+ break;
+ case DW_EH_PE_udata4:
+ encoding_size = 4;
+ break;
+ case DW_EH_PE_udata8:
+ encoding_size = 8;
+ break;
+ default:
+ abort ();
+ }
+
+ /* If the user has requested absolute encoding,
+ then use the smaller DW_OP_addr encoding. */
+ if (insn->u.ea.encoding == DW_EH_PE_absptr)
+ {
+ out_uleb128 (1 + encoding_size);
+ out_one (DW_OP_addr);
+ }
+ else
+ {
+ out_uleb128 (1 + 1 + encoding_size);
+ out_one (DW_OP_GNU_encoded_addr);
+ out_one (encoding);
+
+ if ((encoding & 0x70) == DW_EH_PE_pcrel)
+ {
+#if CFI_DIFF_EXPR_OK
+ insn->u.ea.exp.X_op = O_subtract;
+ insn->u.ea.exp.X_op_symbol = symbol_temp_new_now ();
+#elif defined (tc_cfi_emit_pcrel_expr)
+ tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, encoding_size);
+ break;
+#else
+ abort ();
+#endif
+ }
+ }
+ emit_expr (&insn->u.ea.exp, encoding_size);
+ }
+ break;
+
default:
abort ();
}
break;
case CFI_escape:
+ case CFI_val_encoded_addr:
/* Don't bother matching these for now. */
goto fail;
&& (!j
|| j->insn == DW_CFA_advance_loc
|| j->insn == DW_CFA_remember_state
- || j->insn == CFI_escape))
+ || j->insn == CFI_escape
+ || j->insn == CFI_val_encoded_addr))
{
*pfirst = j;
return cie;
for (i = cie->first; i ; i = i->next)
if (i->insn == DW_CFA_advance_loc
|| i->insn == DW_CFA_remember_state
- || i->insn == CFI_escape)
+ || i->insn == CFI_escape
+ || i->insn == CFI_val_encoded_addr)
break;
cie->last = i;
subseg_set (cfi_seg, 0);
record_alignment (cfi_seg, EH_FRAME_ALIGNMENT);
+#ifdef md_fix_up_eh_frame
+ md_fix_up_eh_frame (cfi_seg);
+#endif
+
/* Make sure check_eh_frame doesn't do anything with our output. */
save_flag_traditional_format = flag_traditional_format;
flag_traditional_format = 1;
projects / deliverable / binutils-gdb.git / blobdiff