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Diffstat (limited to 'gas/dw2gencfi.c')
-rw-r--r--gas/dw2gencfi.c272
1 files changed, 262 insertions, 10 deletions
diff --git a/gas/dw2gencfi.c b/gas/dw2gencfi.c
index 4e39ac5..97e1237 100644
--- a/gas/dw2gencfi.c
+++ b/gas/dw2gencfi.c
@@ -88,6 +88,10 @@ struct fde_entry
symbolS *end_address;
struct cfi_insn_data *data;
struct cfi_insn_data **last;
+ unsigned char per_encoding;
+ unsigned char lsda_encoding;
+ expressionS personality;
+ expressionS lsda;
unsigned int return_column;
unsigned int signal_frame;
};
@@ -98,6 +102,9 @@ struct cie_entry
symbolS *start_address;
unsigned int return_column;
unsigned int signal_frame;
+ unsigned char per_encoding;
+ unsigned char lsda_encoding;
+ expressionS personality;
struct cfi_insn_data *first, *last;
};
@@ -139,6 +146,8 @@ alloc_fde_entry (void)
fde->last = &fde->data;
fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
+ fde->per_encoding = DW_EH_PE_omit;
+ fde->lsda_encoding = DW_EH_PE_omit;
return fde;
}
@@ -357,6 +366,8 @@ static void dot_cfi (int);
static void dot_cfi_escape (int);
static void dot_cfi_startproc (int);
static void dot_cfi_endproc (int);
+static void dot_cfi_personality (int);
+static void dot_cfi_lsda (int);
/* Fake CFI type; outside the byte range of any real CFI insn. */
#define CFI_adjust_cfa_offset 0x100
@@ -385,6 +396,8 @@ const pseudo_typeS cfi_pseudo_table[] =
{ "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
{ "cfi_escape", dot_cfi_escape, 0 },
{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
+ { "cfi_personality", dot_cfi_personality, 0 },
+ { "cfi_lsda", dot_cfi_lsda, 0 },
{ NULL, NULL, 0 }
};
@@ -611,6 +624,148 @@ dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
}
static void
+dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
+{
+ struct fde_entry *fde;
+ offsetT encoding;
+
+ if (frchain_now->frch_cfi_data == NULL)
+ {
+ as_bad (_("CFI instruction used without previous .cfi_startproc"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ fde = frchain_now->frch_cfi_data->cur_fde_data;
+ encoding = get_absolute_expression ();
+ if (encoding == DW_EH_PE_omit)
+ {
+ demand_empty_rest_of_line ();
+ fde->per_encoding = encoding;
+ return;
+ }
+
+ if ((encoding & 0xff) != encoding
+ || ((encoding & 0x70) != 0
+#if defined 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_personality"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ if (*input_line_pointer++ != ',')
+ {
+ as_bad (_(".cfi_personality requires encoding and symbol arguments"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ expression_and_evaluate (&fde->personality);
+ switch (fde->personality.X_op)
+ {
+ case O_symbol:
+ break;
+ case O_constant:
+ if ((encoding & 0x70) == DW_EH_PE_pcrel)
+ encoding = DW_EH_PE_omit;
+ break;
+ default:
+ encoding = DW_EH_PE_omit;
+ break;
+ }
+
+ fde->per_encoding = encoding;
+
+ if (encoding == DW_EH_PE_omit)
+ {
+ as_bad (_("wrong second argument to .cfi_personality"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ demand_empty_rest_of_line ();
+}
+
+static void
+dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
+{
+ struct fde_entry *fde;
+ offsetT encoding;
+
+ if (frchain_now->frch_cfi_data == NULL)
+ {
+ as_bad (_("CFI instruction used without previous .cfi_startproc"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ fde = frchain_now->frch_cfi_data->cur_fde_data;
+ encoding = get_absolute_expression ();
+ if (encoding == DW_EH_PE_omit)
+ {
+ demand_empty_rest_of_line ();
+ fde->lsda_encoding = encoding;
+ return;
+ }
+
+ if ((encoding & 0xff) != encoding
+ || ((encoding & 0x70) != 0
+#if defined 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"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ if (*input_line_pointer++ != ',')
+ {
+ as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ fde->lsda_encoding = encoding;
+
+ expression_and_evaluate (&fde->lsda);
+ switch (fde->lsda.X_op)
+ {
+ case O_symbol:
+ break;
+ case O_constant:
+ if ((encoding & 0x70) == DW_EH_PE_pcrel)
+ encoding = DW_EH_PE_omit;
+ break;
+ default:
+ encoding = DW_EH_PE_omit;
+ break;
+ }
+
+ fde->lsda_encoding = encoding;
+
+ if (encoding == DW_EH_PE_omit)
+ {
+ as_bad (_("wrong second argument to .cfi_lsda"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ demand_empty_rest_of_line ();
+}
+
+static void
dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
{
int simple = 0;
@@ -725,18 +880,18 @@ output_cfi_insn (struct cfi_insn_data *insn)
out_one (DW_CFA_advance_loc + scaled);
else if (delta <= 0xFF)
{
- out_one (DW_CFA_advance_loc1);
- out_one (delta);
+ out_one (DW_CFA_advance_loc1);
+ out_one (delta);
}
else if (delta <= 0xFFFF)
{
- out_one (DW_CFA_advance_loc2);
- out_two (delta);
+ out_one (DW_CFA_advance_loc2);
+ out_two (delta);
}
else
{
- out_one (DW_CFA_advance_loc4);
- out_four (delta);
+ out_one (DW_CFA_advance_loc4);
+ out_four (delta);
}
}
else
@@ -861,12 +1016,33 @@ output_cfi_insn (struct cfi_insn_data *insn)
}
}
+static offsetT
+encoding_size (unsigned char encoding)
+{
+ if (encoding == DW_EH_PE_omit)
+ return 0;
+ switch (encoding & 0x7)
+ {
+ case 0:
+ return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
+ case DW_EH_PE_udata2:
+ return 2;
+ case DW_EH_PE_udata4:
+ return 4;
+ case DW_EH_PE_udata8:
+ return 8;
+ default:
+ abort ();
+ }
+}
+
static void
output_cie (struct cie_entry *cie)
{
symbolS *after_size_address, *end_address;
expressionS exp;
struct cfi_insn_data *i;
+ offsetT augmentation_size;
cie->start_address = symbol_temp_new_now ();
after_size_address = symbol_temp_make ();
@@ -882,6 +1058,10 @@ output_cie (struct cie_entry *cie)
out_four (0); /* CIE id. */
out_one (DW_CIE_VERSION); /* Version. */
out_one ('z'); /* Augmentation. */
+ if (cie->per_encoding != DW_EH_PE_omit)
+ out_one ('P');
+ if (cie->lsda_encoding != DW_EH_PE_omit)
+ out_one ('L');
out_one ('R');
if (cie->signal_frame)
out_one ('S');
@@ -892,7 +1072,32 @@ output_cie (struct cie_entry *cie)
out_one (cie->return_column);
else
out_uleb128 (cie->return_column);
- out_uleb128 (1); /* Augmentation size. */
+ augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
+ if (cie->per_encoding != DW_EH_PE_omit)
+ augmentation_size += 1 + encoding_size (cie->per_encoding);
+ out_uleb128 (augmentation_size); /* Augmentation size. */
+ if (cie->per_encoding != DW_EH_PE_omit)
+ {
+ offsetT size = encoding_size (cie->per_encoding);
+ out_one (cie->per_encoding);
+ exp = cie->personality;
+ if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
+ {
+#ifdef DIFF_EXPR_OK
+ exp.X_op = O_subtract;
+ exp.X_op_symbol = symbol_temp_new_now ();
+ emit_expr (&exp, size);
+#elif defined (tc_cfi_emit_pcrel_expr)
+ tc_cfi_emit_pcrel_expr (&exp, size);
+#else
+ abort ();
+#endif
+ }
+ else
+ emit_expr (&exp, size);
+ }
+ if (cie->lsda_encoding != DW_EH_PE_omit)
+ out_one (cie->lsda_encoding);
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4);
#else
@@ -913,6 +1118,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
{
symbolS *after_size_address, *end_address;
expressionS exp;
+ offsetT augmentation_size;
after_size_address = symbol_temp_make ();
end_address = symbol_temp_make ();
@@ -928,7 +1134,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
exp.X_op_symbol = cie->start_address;
emit_expr (&exp, 4); /* CIE offset. */
-#ifdef DIFF_EXPR_OK
+#ifdef DIFF_EXPR_OK
exp.X_add_symbol = fde->start_address;
exp.X_op_symbol = symbol_temp_new_now ();
emit_expr (&exp, 4); /* Code offset. */
@@ -948,7 +1154,27 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
exp.X_op_symbol = fde->start_address; /* Code length. */
emit_expr (&exp, 4);
- out_uleb128 (0); /* Augmentation size. */
+ augmentation_size = encoding_size (fde->lsda_encoding);
+ out_uleb128 (augmentation_size); /* Augmentation size. */
+
+ if (fde->lsda_encoding != DW_EH_PE_omit)
+ {
+ exp = fde->lsda;
+ if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
+ {
+#ifdef DIFF_EXPR_OK
+ exp.X_op = O_subtract;
+ exp.X_op_symbol = symbol_temp_new_now ();
+ emit_expr (&exp, augmentation_size);
+#elif defined (tc_cfi_emit_pcrel_expr)
+ tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
+#else
+ abort ();
+#endif
+ }
+ else
+ emit_expr (&exp, augmentation_size);
+ }
for (; first; first = first->next)
output_cfi_insn (first);
@@ -966,8 +1192,31 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
for (cie = cie_root; cie; cie = cie->next)
{
if (cie->return_column != fde->return_column
- || cie->signal_frame != fde->signal_frame)
+ || cie->signal_frame != fde->signal_frame
+ || cie->per_encoding != fde->per_encoding
+ || cie->lsda_encoding != fde->lsda_encoding)
continue;
+ if (cie->per_encoding != DW_EH_PE_omit)
+ {
+ if (cie->personality.X_op != fde->personality.X_op
+ || cie->personality.X_add_number
+ != fde->personality.X_add_number)
+ continue;
+ switch (cie->personality.X_op)
+ {
+ case O_constant:
+ if (cie->personality.X_unsigned != fde->personality.X_unsigned)
+ continue;
+ break;
+ case O_symbol:
+ if (cie->personality.X_add_symbol
+ != fde->personality.X_add_symbol)
+ continue;
+ break;
+ default:
+ abort ();
+ }
+ }
for (i = cie->first, j = fde->data;
i != cie->last && j != NULL;
i = i->next, j = j->next)
@@ -1040,6 +1289,9 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
cie_root = cie;
cie->return_column = fde->return_column;
cie->signal_frame = fde->signal_frame;
+ cie->per_encoding = fde->per_encoding;
+ cie->lsda_encoding = fde->lsda_encoding;
+ cie->personality = fde->personality;
cie->first = fde->data;
for (i = cie->first; i ; i = i->next)
generated by cgit v1.1 at 2024-12-27 07:32:37 +0000