/* dw2gencfi.c - Support for generating Dwarf2 CFI information.
- Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2020 Free Software Foundation, Inc.
Contributed by Michal Ludvig <mludvig@suse.cz>
This file is part of GAS, the GNU Assembler.
#endif
#ifndef CFI_DIFF_LSDA_OK
-# define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK
+#define CFI_DIFF_LSDA_OK CFI_DIFF_EXPR_OK
#endif
#if CFI_DIFF_EXPR_OK == 1 && CFI_DIFF_LSDA_OK == 0
/* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field
of the CIE. Default to 1 if not otherwise specified. */
-#ifndef DWARF2_LINE_MIN_INSN_LENGTH
-# define DWARF2_LINE_MIN_INSN_LENGTH 1
+#ifndef DWARF2_LINE_MIN_INSN_LENGTH
+#define DWARF2_LINE_MIN_INSN_LENGTH 1
#endif
/* By default, use 32-bit relocations from .eh_frame into .text. */
#ifndef DWARF2_FDE_RELOC_SIZE
-# define DWARF2_FDE_RELOC_SIZE 4
+#define DWARF2_FDE_RELOC_SIZE 4
#endif
/* By default, use a read-only .eh_frame section. */
#ifndef DWARF2_EH_FRAME_READ_ONLY
-# define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY
+#define DWARF2_EH_FRAME_READ_ONLY SEC_READONLY
#endif
#ifndef EH_FRAME_ALIGNMENT
-# define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
+#define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
#endif
#ifndef tc_cfi_frame_initial_instructions
-# define tc_cfi_frame_initial_instructions() ((void)0)
+#define tc_cfi_frame_initial_instructions() ((void)0)
#endif
+#ifndef tc_cfi_startproc
+# define tc_cfi_startproc() ((void)0)
+#endif
+
+#ifndef tc_cfi_endproc
+# define tc_cfi_endproc(fde) ((void) (fde))
+#endif
+
+#define EH_FRAME_LINKONCE (SUPPORT_FRAME_LINKONCE || compact_eh)
+
#ifndef DWARF2_FORMAT
-# define DWARF2_FORMAT(SEC) dwarf2_format_32bit
+#define DWARF2_FORMAT(SEC) dwarf2_format_32bit
#endif
#ifndef DWARF2_ADDR_SIZE
-# define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
+#define DWARF2_ADDR_SIZE(bfd) (bfd_arch_bits_per_address (bfd) / 8)
#endif
-struct cfi_escape_data {
- struct cfi_escape_data *next;
- expressionS exp;
+#if MULTIPLE_FRAME_SECTIONS
+#define CUR_SEG(structp) structp->cur_seg
+#define SET_CUR_SEG(structp, seg) structp->cur_seg = seg
+#define HANDLED(structp) structp->handled
+#define SET_HANDLED(structp, val) structp->handled = val
+#else
+#define CUR_SEG(structp) NULL
+#define SET_CUR_SEG(structp, seg) (void) (0 && seg)
+#define HANDLED(structp) 0
+#define SET_HANDLED(structp, val) (void) (0 && val)
+#endif
+
+#ifndef tc_cfi_reloc_for_encoding
+#define tc_cfi_reloc_for_encoding(e) BFD_RELOC_NONE
+#endif
+
+/* Private segment collection list. */
+struct dwcfi_seg_list
+{
+ segT seg;
+ int subseg;
+ char * seg_name;
};
-struct cfi_insn_data
+#ifdef SUPPORT_COMPACT_EH
+static bfd_boolean compact_eh;
+#else
+#define compact_eh 0
+#endif
+
+static struct hash_control *dwcfi_hash;
+\f
+/* Emit a single byte into the current segment. */
+
+static inline void
+out_one (int byte)
+{
+ FRAG_APPEND_1_CHAR (byte);
+}
+
+/* Emit a two-byte word into the current segment. */
+
+static inline void
+out_two (int data)
{
- struct cfi_insn_data *next;
- int insn;
- union {
- struct {
- unsigned reg;
- offsetT offset;
- } ri;
+ md_number_to_chars (frag_more (2), data, 2);
+}
+
+/* Emit a four byte word into the current segment. */
- struct {
- unsigned reg1;
- unsigned reg2;
- } rr;
+static inline void
+out_four (int data)
+{
+ md_number_to_chars (frag_more (4), data, 4);
+}
- unsigned r;
- offsetT i;
+/* Emit an unsigned "little-endian base 128" number. */
- struct {
- symbolS *lab1;
- symbolS *lab2;
- } ll;
+static void
+out_uleb128 (addressT value)
+{
+ output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
+}
- struct cfi_escape_data *esc;
+/* Emit an unsigned "little-endian base 128" number. */
- struct {
- unsigned reg, encoding;
- expressionS exp;
- } ea;
- } u;
-};
+static void
+out_sleb128 (offsetT value)
+{
+ output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
+}
-struct fde_entry
+static unsigned int
+encoding_size (unsigned char encoding)
{
- struct fde_entry *next;
- symbolS *start_address;
- 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;
+ 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 ();
+ }
+}
+
+/* Emit expression EXP in ENCODING. If EMIT_ENCODING is true, first
+ emit a byte containing ENCODING. */
+
+static void
+emit_expr_encoded (expressionS *exp, int encoding, bfd_boolean emit_encoding)
+{
+ unsigned int size = encoding_size (encoding);
+ bfd_reloc_code_real_type code;
+
+ if (encoding == DW_EH_PE_omit)
+ return;
+
+ if (emit_encoding)
+ out_one (encoding);
+
+ code = tc_cfi_reloc_for_encoding (encoding);
+ if (code != BFD_RELOC_NONE)
+ {
+ reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code);
+ char *p = frag_more (size);
+ gas_assert (size == (unsigned) howto->bitsize / 8);
+ md_number_to_chars (p, 0, size);
+ fix_new (frag_now, p - frag_now->fr_literal, size, exp->X_add_symbol,
+ exp->X_add_number, howto->pc_relative, code);
+ }
+ else if ((encoding & 0x70) == DW_EH_PE_pcrel)
+ {
+#if CFI_DIFF_EXPR_OK
+ expressionS tmp = *exp;
+ tmp.X_op = O_subtract;
+ tmp.X_op_symbol = symbol_temp_new_now ();
+ emit_expr (&tmp, size);
+#elif defined (tc_cfi_emit_pcrel_expr)
+ tc_cfi_emit_pcrel_expr (exp, size);
+#else
+ abort ();
+#endif
+ }
+ else
+ emit_expr (exp, size);
+}
+\f
+/* Build based on segment the derived .debug_...
+ segment name containing origin segment's postfix name part. */
+
+static char *
+get_debugseg_name (segT seg, const char *base_name)
+{
+ const char * name;
+ const char * dollar;
+ const char * dot;
+
+ if (!seg)
+ return concat (base_name, NULL);
+
+ name = bfd_section_name (seg);
+
+ if (name == NULL || *name == 0)
+ return concat (base_name, NULL);
+
+ dollar = strchr (name, '$');
+ dot = strchr (name + 1, '.');
+
+ if (!dollar && !dot)
+ {
+ if (!strcmp (base_name, ".eh_frame_entry")
+ && strcmp (name, ".text") != 0)
+ return concat (base_name, ".", name, NULL);
+
+ name = "";
+ }
+ else if (!dollar)
+ name = dot;
+ else if (!dot)
+ name = dollar;
+ else if (dot < dollar)
+ name = dot;
+ else
+ name = dollar;
+
+ return concat (base_name, name, NULL);
+}
+
+/* Allocate a dwcfi_seg_list structure. */
+
+static struct dwcfi_seg_list *
+alloc_debugseg_item (segT seg, int subseg, char *name)
+{
+ struct dwcfi_seg_list *r;
+
+ r = (struct dwcfi_seg_list *)
+ xmalloc (sizeof (struct dwcfi_seg_list) + strlen (name));
+ r->seg = seg;
+ r->subseg = subseg;
+ r->seg_name = name;
+ return r;
+}
+
+static segT
+is_now_linkonce_segment (void)
+{
+ if (compact_eh)
+ return now_seg;
+
+ if ((bfd_section_flags (now_seg)
+ & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
+ | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
+ | SEC_LINK_DUPLICATES_SAME_CONTENTS)) != 0)
+ return now_seg;
+ return NULL;
+}
+
+/* Generate debug... segment with same linkonce properties
+ of based segment. */
+
+static segT
+make_debug_seg (segT cseg, char *name, int sflags)
+{
+ segT save_seg = now_seg;
+ int save_subseg = now_subseg;
+ segT r;
+ flagword flags;
+
+ r = subseg_new (name, 0);
+
+ /* Check if code segment is marked as linked once. */
+ if (!cseg)
+ flags = 0;
+ else
+ flags = (bfd_section_flags (cseg)
+ & (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
+ | SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE
+ | SEC_LINK_DUPLICATES_SAME_CONTENTS));
+
+ /* Add standard section flags. */
+ flags |= sflags;
+
+ /* Apply possibly linked once flags to new generated segment, too. */
+ if (!bfd_set_section_flags (r, flags))
+ as_bad (_("bfd_set_section_flags: %s"),
+ bfd_errmsg (bfd_get_error ()));
+
+ /* Restore to previous segment. */
+ if (save_seg != NULL)
+ subseg_set (save_seg, save_subseg);
+ return r;
+}
+
+static void
+dwcfi_hash_insert (const char *name, struct dwcfi_seg_list *item)
+{
+ const char *error_string;
+
+ if ((error_string = hash_jam (dwcfi_hash, name, (char *) item)))
+ as_fatal (_("Inserting \"%s\" into structure table failed: %s"),
+ name, error_string);
+}
+
+static struct dwcfi_seg_list *
+dwcfi_hash_find (char *name)
+{
+ return (struct dwcfi_seg_list *) hash_find (dwcfi_hash, name);
+}
+
+static struct dwcfi_seg_list *
+dwcfi_hash_find_or_make (segT cseg, const char *base_name, int flags)
+{
+ struct dwcfi_seg_list *item;
+ char *name;
+
+ /* Initialize dwcfi_hash once. */
+ if (!dwcfi_hash)
+ dwcfi_hash = hash_new ();
+
+ name = get_debugseg_name (cseg, base_name);
+
+ item = dwcfi_hash_find (name);
+ if (!item)
+ {
+ item = alloc_debugseg_item (make_debug_seg (cseg, name, flags), 0, name);
+
+ dwcfi_hash_insert (item->seg_name, item);
+ }
+ else
+ free (name);
+
+ return item;
+}
+
+/* ??? Share this with dwarf2cfg.c. */
+#ifndef TC_DWARF2_EMIT_OFFSET
+#define TC_DWARF2_EMIT_OFFSET generic_dwarf2_emit_offset
+
+/* Create an offset to .dwarf2_*. */
+
+static void
+generic_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
+{
+ expressionS exp;
+
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = symbol;
+ exp.X_add_number = 0;
+ emit_expr (&exp, size);
+}
+#endif
+
+struct cfi_escape_data
+{
+ struct cfi_escape_data *next;
+ expressionS exp;
};
struct cie_entry
{
struct cie_entry *next;
+#if MULTIPLE_FRAME_SECTIONS
+ segT cur_seg;
+#endif
symbolS *start_address;
unsigned int return_column;
unsigned int signal_frame;
+ unsigned char fde_encoding;
unsigned char per_encoding;
unsigned char lsda_encoding;
expressionS personality;
+#ifdef tc_cie_entry_extras
+ tc_cie_entry_extras
+#endif
struct cfi_insn_data *first, *last;
};
-
/* List of FDE entries. */
-static struct fde_entry *all_fde_data;
+
+struct fde_entry *all_fde_data;
static struct fde_entry **last_fde_data = &all_fde_data;
/* List of CIEs so that they could be reused. */
static struct cie_entry *cie_root;
-/* Stack of old CFI data, for save/restore. */
-struct cfa_save_data
-{
- struct cfa_save_data *next;
- offsetT cfa_offset;
-};
-
-/* Current open FDE entry. */
-struct frch_cfi_data
-{
- struct fde_entry *cur_fde_data;
- symbolS *last_address;
- offsetT cur_cfa_offset;
- struct cfa_save_data *cfa_save_stack;
-};
-\f
/* Construct a new FDE structure and add it to the end of the fde list. */
static struct fde_entry *
alloc_fde_entry (void)
{
- struct fde_entry *fde = (struct fde_entry *)
- xcalloc (1, sizeof (struct fde_entry));
+ struct fde_entry *fde = XCNEW (struct fde_entry);
- frchain_now->frch_cfi_data = (struct frch_cfi_data *)
- xcalloc (1, sizeof (struct frch_cfi_data));
+ frchain_now->frch_cfi_data = XCNEW (struct frch_cfi_data);
frchain_now->frch_cfi_data->cur_fde_data = fde;
*last_fde_data = fde;
last_fde_data = &fde->next;
-
+ SET_CUR_SEG (fde, is_now_linkonce_segment ());
+ SET_HANDLED (fde, 0);
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;
+ fde->eh_header_type = EH_COMPACT_UNKNOWN;
+#ifdef tc_fde_entry_init_extra
+ tc_fde_entry_init_extra (fde)
+#endif
return fde;
}
/* Construct a new INSN structure and add it to the end of the insn list
for the currently active FDE. */
+static bfd_boolean cfi_sections_set = FALSE;
+static int cfi_sections = CFI_EMIT_eh_frame;
+int all_cfi_sections = 0;
+static struct fde_entry *last_fde;
+
static struct cfi_insn_data *
alloc_cfi_insn_data (void)
{
- struct cfi_insn_data *insn = (struct cfi_insn_data *)
- xcalloc (1, sizeof (struct cfi_insn_data));
+ struct cfi_insn_data *insn = XCNEW (struct cfi_insn_data);
struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data;
*cur_fde_data->last = insn;
cur_fde_data->last = &insn->next;
-
+ SET_CUR_SEG (insn, is_now_linkonce_segment ());
return insn;
}
/* Construct a new FDE structure that begins at LABEL. */
-void
+void
cfi_new_fde (symbolS *label)
{
struct fde_entry *fde = alloc_fde_entry ();
/* End the currently open FDE. */
-void
+void
cfi_end_fde (symbolS *label)
{
frchain_now->frch_cfi_data->cur_fde_data->end_address = label;
frchain_now->frch_cfi_data->cur_fde_data->return_column = regno;
}
+void
+cfi_set_sections (void)
+{
+ frchain_now->frch_cfi_data->cur_fde_data->sections = all_cfi_sections;
+ cfi_sections_set = TRUE;
+}
+
/* Universal functions to store new instructions. */
static void
-cfi_add_CFA_insn(int insn)
+cfi_add_CFA_insn (int insn)
{
struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
frchain_now->frch_cfi_data->last_address = label;
}
+/* Add a CFI insn to label the current position in the CFI segment. */
+
+void
+cfi_add_label (const char *name)
+{
+ unsigned int len = strlen (name) + 1;
+ struct cfi_insn_data *insn = alloc_cfi_insn_data ();
+
+ insn->insn = CFI_label;
+ obstack_grow (¬es, name, len);
+ insn->u.sym_name = (char *) obstack_finish (¬es);
+}
+
/* Add a DW_CFA_offset record to the CFI data. */
void
as_bad (_("register save offset not a multiple of %u"), abs_data_align);
}
+/* Add a DW_CFA_val_offset record to the CFI data. */
+
+void
+cfi_add_CFA_val_offset (unsigned regno, offsetT offset)
+{
+ unsigned int abs_data_align;
+
+ gas_assert (DWARF2_CIE_DATA_ALIGNMENT != 0);
+ cfi_add_CFA_insn_reg_offset (DW_CFA_val_offset, regno, offset);
+
+ abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0
+ ? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT);
+ if (offset % abs_data_align)
+ as_bad (_("register save offset not a multiple of %u"), abs_data_align);
+}
+
/* Add a DW_CFA_def_cfa record to the CFI data. */
void
cfi_add_CFA_insn (DW_CFA_remember_state);
- p = (struct cfa_save_data *) xmalloc (sizeof (*p));
+ p = XNEW (struct cfa_save_data);
p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset;
p->next = frchain_now->frch_cfi_data->cfa_save_stack;
frchain_now->frch_cfi_data->cfa_save_stack = p;
static void dot_cfi_sections (int);
static void dot_cfi_startproc (int);
static void dot_cfi_endproc (int);
+static void dot_cfi_fde_data (int);
static void dot_cfi_personality (int);
+static void dot_cfi_personality_id (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_return_column 0x101
-#define CFI_rel_offset 0x102
-#define CFI_escape 0x103
-#define CFI_signal_frame 0x104
-#define CFI_val_encoded_addr 0x105
+static void dot_cfi_inline_lsda (int);
+static void dot_cfi_label (int);
const pseudo_typeS cfi_pseudo_table[] =
{
{ "cfi_sections", dot_cfi_sections, 0 },
{ "cfi_startproc", dot_cfi_startproc, 0 },
{ "cfi_endproc", dot_cfi_endproc, 0 },
+ { "cfi_fde_data", dot_cfi_fde_data, 0 },
{ "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa },
{ "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register },
{ "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset },
{ "cfi_remember_state", dot_cfi, DW_CFA_remember_state },
{ "cfi_restore_state", dot_cfi, DW_CFA_restore_state },
{ "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
+ { "cfi_negate_ra_state", dot_cfi, DW_CFA_AARCH64_negate_ra_state },
{ "cfi_escape", dot_cfi_escape, 0 },
{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
{ "cfi_personality", dot_cfi_personality, 0 },
+ { "cfi_personality_id", dot_cfi_personality_id, 0 },
{ "cfi_lsda", dot_cfi_lsda, 0 },
{ "cfi_val_encoded_addr", dot_cfi_val_encoded_addr, 0 },
+ { "cfi_inline_lsda", dot_cfi_inline_lsda, 0 },
+ { "cfi_label", dot_cfi_label, 0 },
+ { "cfi_val_offset", dot_cfi, DW_CFA_val_offset },
{ NULL, NULL, 0 }
};
#ifndef tc_parse_to_dw2regnum
static void
-tc_parse_to_dw2regnum(expressionS *exp)
+tc_parse_to_dw2regnum (expressionS *exp)
{
# ifdef tc_regname_to_dw2regnum
SKIP_WHITESPACE ();
{
char *name, c;
- name = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
exp->X_op = O_constant;
exp->X_add_number = tc_regname_to_dw2regnum (name);
- *input_line_pointer = c;
+ restore_line_pointer (c);
}
else
# endif
/* 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 ())
+ || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
+ != frag_now_fix ()))
cfi_add_advance_loc (symbol_temp_new_now ());
switch (arg)
cfi_add_CFA_offset (reg1, offset);
break;
+ case DW_CFA_val_offset:
+ reg1 = cfi_parse_reg ();
+ cfi_parse_separator ();
+ offset = cfi_parse_const ();
+ cfi_add_CFA_val_offset (reg1, offset);
+ break;
+
case CFI_rel_offset:
reg1 = cfi_parse_reg ();
cfi_parse_separator ();
/* 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 ())
+ || (S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
+ != frag_now_fix ()))
cfi_add_advance_loc (symbol_temp_new_now ());
tail = &head;
do
{
- e = (struct cfi_escape_data *) xmalloc (sizeof (*e));
+ e = XNEW (struct cfi_escape_data);
do_parse_cons_expression (&e->exp, 1);
*tail = e;
tail = &e->next;
}
if ((encoding & 0xff) != encoding
- || ((encoding & 0x70) != 0
+ || ((((encoding & 0x70) != 0
#if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
- && (encoding & 0x70) != DW_EH_PE_pcrel
+ && (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)
+ )
+ /* leb128 can be handled, but does something actually need it? */
+ || (encoding & 7) == DW_EH_PE_uleb128
+ || (encoding & 7) > DW_EH_PE_udata8)
+ && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE))
{
as_bad (_("invalid or unsupported encoding in .cfi_personality"));
ignore_rest_of_line ();
}
if ((encoding & 0xff) != encoding
- || ((encoding & 0x70) != 0
+ || ((((encoding & 0x70) != 0
#if CFI_DIFF_LSDA_OK || defined tc_cfi_emit_pcrel_expr
- && (encoding & 0x70) != DW_EH_PE_pcrel
+ && (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)
+ )
+ /* leb128 can be handled, but does something actually need it? */
+ || (encoding & 7) == DW_EH_PE_uleb128
+ || (encoding & 7) > DW_EH_PE_udata8)
+ && tc_cfi_reloc_for_encoding (encoding) == BFD_RELOC_NONE))
{
as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
ignore_rest_of_line ();
/* 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 ())
+ || (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 & 0x70) != DW_EH_PE_pcrel
#endif
)
- /* leb128 can be handled, but does something actually need it? */
+ /* leb128 can be handled, but does something actually need it? */
|| (encoding & 7) == DW_EH_PE_uleb128
|| (encoding & 7) > DW_EH_PE_udata8)
{
break;
case O_constant:
if ((encoding & 0x70) != DW_EH_PE_pcrel)
- break;
+ break;
+ /* Fall through. */
default:
encoding = DW_EH_PE_omit;
break;
demand_empty_rest_of_line ();
}
-/* By default emit .eh_frame only, not .debug_frame. */
-#define CFI_EMIT_eh_frame (1 << 0)
-#define CFI_EMIT_debug_frame (1 << 1)
-static int cfi_sections = CFI_EMIT_eh_frame;
+static void
+dot_cfi_label (int ignored ATTRIBUTE_UNUSED)
+{
+ char *name;
+
+ if (frchain_now->frch_cfi_data == NULL)
+ {
+ as_bad (_("CFI instruction used without previous .cfi_startproc"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ name = read_symbol_name ();
+ if (name == NULL)
+ 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 ());
+
+ cfi_add_label (name);
+ free (name);
+
+ demand_empty_rest_of_line ();
+}
static void
dot_cfi_sections (int ignored ATTRIBUTE_UNUSED)
int sections = 0;
SKIP_WHITESPACE ();
- if (is_name_beginner (*input_line_pointer))
+ if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"')
while (1)
{
+ char * saved_ilp;
char *name, c;
- name = input_line_pointer;
- c = get_symbol_end ();
+ saved_ilp = input_line_pointer;
+ c = get_symbol_name (& name);
- if (strcmp (name, ".eh_frame") == 0)
+ if (strncmp (name, ".eh_frame", sizeof ".eh_frame") == 0
+ && name[9] != '_')
sections |= CFI_EMIT_eh_frame;
- else if (strcmp (name, ".debug_frame") == 0)
+ else if (strncmp (name, ".debug_frame", sizeof ".debug_frame") == 0)
sections |= CFI_EMIT_debug_frame;
+#if SUPPORT_COMPACT_EH
+ else if (strncmp (name, ".eh_frame_entry",
+ sizeof ".eh_frame_entry") == 0)
+ {
+ compact_eh = TRUE;
+ sections |= CFI_EMIT_eh_frame_compact;
+ }
+#endif
+#ifdef tc_cfi_section_name
+ else if (strcmp (name, tc_cfi_section_name) == 0)
+ sections |= CFI_EMIT_target;
+#endif
else
{
*input_line_pointer = c;
- input_line_pointer = name;
+ input_line_pointer = saved_ilp;
break;
}
*input_line_pointer = c;
- SKIP_WHITESPACE ();
+ SKIP_WHITESPACE_AFTER_NAME ();
if (*input_line_pointer == ',')
{
name = input_line_pointer++;
SKIP_WHITESPACE ();
- if (!is_name_beginner (*input_line_pointer))
+ if (!is_name_beginner (*input_line_pointer)
+ && *input_line_pointer != '"')
{
input_line_pointer = name;
break;
}
}
- else if (is_name_beginner (*input_line_pointer))
+ else if (is_name_beginner (*input_line_pointer)
+ || *input_line_pointer == '"')
break;
}
demand_empty_rest_of_line ();
+ if (cfi_sections_set
+ && (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact))
+ && ((cfi_sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact))
+ != (sections & (CFI_EMIT_eh_frame | CFI_EMIT_eh_frame_compact))))
+ as_bad (_("inconsistent uses of .cfi_sections"));
cfi_sections = sections;
}
cfi_new_fde (symbol_temp_new_now ());
SKIP_WHITESPACE ();
- if (is_name_beginner (*input_line_pointer))
+ if (is_name_beginner (*input_line_pointer) || *input_line_pointer == '"')
{
+ char * saved_ilp = input_line_pointer;
char *name, c;
- name = input_line_pointer;
- c = get_symbol_end ();
+ c = get_symbol_name (& name);
if (strcmp (name, "simple") == 0)
{
simple = 1;
- *input_line_pointer = c;
+ restore_line_pointer (c);
}
else
- input_line_pointer = name;
+ input_line_pointer = saved_ilp;
}
demand_empty_rest_of_line ();
+ cfi_sections_set = TRUE;
+ all_cfi_sections |= cfi_sections;
+ cfi_set_sections ();
frchain_now->frch_cfi_data->cur_cfa_offset = 0;
if (!simple)
tc_cfi_frame_initial_instructions ();
+
+ if ((cfi_sections & CFI_EMIT_target) != 0)
+ tc_cfi_startproc ();
}
static void
return;
}
+ last_fde = frchain_now->frch_cfi_data->cur_fde_data;
+
cfi_end_fde (symbol_temp_new_now ());
demand_empty_rest_of_line ();
-}
-\f
-/* Emit a single byte into the current segment. */
-
-static inline void
-out_one (int byte)
-{
- FRAG_APPEND_1_CHAR (byte);
+ cfi_sections_set = TRUE;
+ if ((cfi_sections & CFI_EMIT_target) != 0)
+ tc_cfi_endproc (last_fde);
}
-/* Emit a two-byte word into the current segment. */
-
-static inline void
-out_two (int data)
+static segT
+get_cfi_seg (segT cseg, const char *base, flagword flags, int align)
{
- md_number_to_chars (frag_more (2), data, 2);
-}
+ /* Exclude .debug_frame sections for Compact EH. */
+ if (SUPPORT_FRAME_LINKONCE || ((flags & SEC_DEBUGGING) == 0 && compact_eh))
+ {
+ struct dwcfi_seg_list *l;
-/* Emit a four byte word into the current segment. */
+ l = dwcfi_hash_find_or_make (cseg, base, flags);
-static inline void
-out_four (int data)
+ cseg = l->seg;
+ subseg_set (cseg, l->subseg);
+ }
+ else
+ {
+ cseg = subseg_new (base, 0);
+ bfd_set_section_flags (cseg, flags);
+ }
+ record_alignment (cseg, align);
+ return cseg;
+}
+
+#if SUPPORT_COMPACT_EH
+static void
+dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED)
{
- md_number_to_chars (frag_more (4), data, 4);
+ struct fde_entry *fde;
+
+ 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;
+ fde->personality_id = cfi_parse_const ();
+ demand_empty_rest_of_line ();
+
+ if (fde->personality_id == 0 || fde->personality_id > 3)
+ {
+ as_bad (_("wrong argument to .cfi_personality_id"));
+ return;
+ }
}
-/* Emit an unsigned "little-endian base 128" number. */
+static void
+dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED)
+{
+ if (frchain_now->frch_cfi_data == NULL)
+ {
+ as_bad (_(".cfi_fde_data without corresponding .cfi_startproc"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ last_fde = frchain_now->frch_cfi_data->cur_fde_data;
+
+ cfi_sections_set = TRUE;
+ if ((cfi_sections & CFI_EMIT_target) != 0
+ || (cfi_sections & CFI_EMIT_eh_frame_compact) != 0)
+ {
+ struct cfi_escape_data *head, **tail, *e;
+ int num_ops = 0;
+
+ tail = &head;
+ if (!is_it_end_of_statement ())
+ {
+ num_ops = 0;
+ do
+ {
+ e = XNEW (struct cfi_escape_data);
+ do_parse_cons_expression (&e->exp, 1);
+ *tail = e;
+ tail = &e->next;
+ num_ops++;
+ }
+ while (*input_line_pointer++ == ',');
+ --input_line_pointer;
+ }
+ *tail = NULL;
+
+ if (last_fde->lsda_encoding != DW_EH_PE_omit)
+ last_fde->eh_header_type = EH_COMPACT_HAS_LSDA;
+ else if (num_ops <= 3 && last_fde->per_encoding == DW_EH_PE_omit)
+ last_fde->eh_header_type = EH_COMPACT_INLINE;
+ else
+ last_fde->eh_header_type = EH_COMPACT_OUTLINE;
+
+ if (last_fde->eh_header_type == EH_COMPACT_INLINE)
+ num_ops = 3;
+
+ last_fde->eh_data_size = num_ops;
+ last_fde->eh_data = XNEWVEC (bfd_byte, num_ops);
+ num_ops = 0;
+ while (head)
+ {
+ e = head;
+ head = e->next;
+ last_fde->eh_data[num_ops++] = e->exp.X_add_number;
+ free (e);
+ }
+ if (last_fde->eh_header_type == EH_COMPACT_INLINE)
+ while (num_ops < 3)
+ last_fde->eh_data[num_ops++] = tc_compact_eh_opcode_stop;
+ }
+
+ demand_empty_rest_of_line ();
+}
+
+/* Function to emit the compact unwinding opcodes stored in the
+ fde's eh_data field. The end of the opcode data will be
+ padded to the value in align. */
static void
-out_uleb128 (addressT value)
+output_compact_unwind_data (struct fde_entry *fde, int align)
{
- output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
+ int data_size = fde->eh_data_size + 2;
+ int align_padding;
+ int amask;
+ char *p;
+
+ fde->eh_loc = symbol_temp_new_now ();
+
+ p = frag_more (1);
+ if (fde->personality_id != 0)
+ *p = fde->personality_id;
+ else if (fde->per_encoding != DW_EH_PE_omit)
+ {
+ *p = 0;
+ emit_expr_encoded (&fde->personality, fde->per_encoding, FALSE);
+ data_size += encoding_size (fde->per_encoding);
+ }
+ else
+ *p = 1;
+
+ amask = (1 << align) - 1;
+ align_padding = ((data_size + amask) & ~amask) - data_size;
+
+ p = frag_more (fde->eh_data_size + 1 + align_padding);
+ memcpy (p, fde->eh_data, fde->eh_data_size);
+ p += fde->eh_data_size;
+
+ while (align_padding-- > 0)
+ *(p++) = tc_compact_eh_opcode_pad;
+
+ *(p++) = tc_compact_eh_opcode_stop;
+ fde->eh_header_type = EH_COMPACT_OUTLINE_DONE;
}
-/* Emit an unsigned "little-endian base 128" number. */
+/* Handle the .cfi_inline_lsda directive. */
+static void
+dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED)
+{
+ segT ccseg;
+ int align;
+ long max_alignment = 28;
+
+ if (!last_fde)
+ {
+ as_bad (_("unexpected .cfi_inline_lsda"));
+ ignore_rest_of_line ();
+ return;
+ }
+ if ((last_fde->sections & CFI_EMIT_eh_frame_compact) == 0)
+ {
+ as_bad (_(".cfi_inline_lsda not valid for this frame"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ if (last_fde->eh_header_type != EH_COMPACT_UNKNOWN
+ && last_fde->eh_header_type != EH_COMPACT_HAS_LSDA)
+ {
+ as_bad (_(".cfi_inline_lsda seen for frame without .cfi_lsda"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ align = get_absolute_expression ();
+ if (align > max_alignment)
+ {
+ align = max_alignment;
+ as_bad (_("Alignment too large: %d. assumed."), align);
+ }
+ else if (align < 0)
+ {
+ as_warn (_("Alignment negative: 0 assumed."));
+ align = 0;
+ }
+
+ demand_empty_rest_of_line ();
+ ccseg = CUR_SEG (last_fde);
+
+ /* Open .gnu_extab section. */
+ get_cfi_seg (ccseg, ".gnu_extab",
+ (SEC_ALLOC | SEC_LOAD | SEC_DATA
+ | DWARF2_EH_FRAME_READ_ONLY),
+ 1);
+
+ frag_align (align, 0, 0);
+ record_alignment (now_seg, align);
+ if (last_fde->eh_header_type == EH_COMPACT_HAS_LSDA)
+ output_compact_unwind_data (last_fde, align);
+
+ last_fde = NULL;
+
+ return;
+}
+#else /* !SUPPORT_COMPACT_EH */
static void
-out_sleb128 (offsetT value)
+dot_cfi_inline_lsda (int ignored ATTRIBUTE_UNUSED)
{
- output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
+ as_bad (_(".cfi_inline_lsda is not supported for this target"));
+ ignore_rest_of_line ();
}
+static void
+dot_cfi_fde_data (int ignored ATTRIBUTE_UNUSED)
+{
+ as_bad (_(".cfi_fde_data is not supported for this target"));
+ ignore_rest_of_line ();
+}
+
+static void
+dot_cfi_personality_id (int ignored ATTRIBUTE_UNUSED)
+{
+ as_bad (_(".cfi_personality_id is not supported for this target"));
+ ignore_rest_of_line ();
+}
+#endif
+\f
static void
output_cfi_insn (struct cfi_insn_data *insn)
{
addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from);
addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH;
- if (scaled <= 0x3F)
+ if (scaled == 0)
+ ;
+ else if (scaled <= 0x3F)
out_one (DW_CFA_advance_loc + scaled);
else if (scaled <= 0xFF)
{
/* The code in ehopt.c expects that one byte of the encoding
is already allocated to the frag. This comes from the way
that it scans the .eh_frame section looking first for the
- .byte DW_CFA_advance_loc4. */
+ .byte DW_CFA_advance_loc4. Call frag_grow with the sum of
+ room needed by frag_more and frag_var to preallocate space
+ ensuring that the DW_CFA_advance_loc4 is in the fixed part
+ of the rs_cfa frag, so that the relax machinery can remove
+ the advance_loc should it advance by zero. */
+ frag_grow (5);
*frag_more (1) = DW_CFA_advance_loc4;
frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3,
}
break;
+ case DW_CFA_val_offset:
+ regno = insn->u.ri.reg;
+ offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT;
+ if (offset < 0)
+ {
+ out_one (DW_CFA_val_offset_sf);
+ out_uleb128 (regno);
+ out_sleb128 (offset);
+ }
+ else
+ {
+ out_one (DW_CFA_val_offset);
+ out_uleb128 (regno);
+ out_uleb128 (offset);
+ }
+ break;
+
case DW_CFA_register:
out_one (DW_CFA_register);
out_uleb128 (insn->u.rr.reg1);
case CFI_val_encoded_addr:
{
- unsigned encoding = insn->u.ea.encoding;
- offsetT encoding_size;
+ unsigned encoding = insn->u.ea.encoding;
+ offsetT enc_size;
if (encoding == DW_EH_PE_omit)
break;
out_one (DW_CFA_val_expression);
out_uleb128 (insn->u.ea.reg);
- switch (encoding & 0x7)
+ switch (encoding & 0x7)
{
case DW_EH_PE_absptr:
- encoding_size = DWARF2_ADDR_SIZE (stdoutput);
+ enc_size = DWARF2_ADDR_SIZE (stdoutput);
break;
case DW_EH_PE_udata2:
- encoding_size = 2;
+ enc_size = 2;
break;
case DW_EH_PE_udata4:
- encoding_size = 4;
+ enc_size = 4;
break;
case DW_EH_PE_udata8:
- encoding_size = 8;
+ enc_size = 8;
break;
default:
abort ();
then use the smaller DW_OP_addr encoding. */
if (insn->u.ea.encoding == DW_EH_PE_absptr)
{
- out_uleb128 (1 + encoding_size);
+ out_uleb128 (1 + enc_size);
out_one (DW_OP_addr);
}
else
{
- out_uleb128 (1 + 1 + encoding_size);
+ out_uleb128 (1 + 1 + enc_size);
out_one (DW_OP_GNU_encoded_addr);
out_one (encoding);
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);
+ tc_cfi_emit_pcrel_expr (&insn->u.ea.exp, enc_size);
break;
#else
abort ();
#endif
}
}
- emit_expr (&insn->u.ea.exp, encoding_size);
+ emit_expr (&insn->u.ea.exp, enc_size);
}
break;
-
- default:
- abort ();
- }
-}
-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;
+ case CFI_label:
+ colon (insn->u.sym_name);
+ break;
+
default:
abort ();
}
if (fmt != dwarf2_format_32bit)
out_four (-1);
}
- out_one (DW_CIE_VERSION); /* Version. */
+ out_one (flag_dwarf_cie_version); /* Version. */
if (eh_frame)
{
out_one ('z'); /* Augmentation. */
if (cie->lsda_encoding != DW_EH_PE_omit)
out_one ('L');
out_one ('R');
- if (cie->signal_frame)
- out_one ('S');
+#ifdef tc_output_cie_extra
+ tc_output_cie_extra (cie);
+#endif
}
+ if (cie->signal_frame)
+ out_one ('S');
out_one (0);
+ if (flag_dwarf_cie_version >= 4)
+ {
+ /* For now we are assuming a flat address space with 4 or 8 byte
+ addresses. */
+ int address_size = dwarf2_format_32bit ? 4 : 8;
+ out_one (address_size); /* Address size. */
+ out_one (0); /* Segment size. */
+ }
out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */
out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */
- if (DW_CIE_VERSION == 1) /* Return column. */
- out_one (cie->return_column);
+ if (flag_dwarf_cie_version == 1) /* Return column. */
+ {
+ if ((cie->return_column & 0xff) != cie->return_column)
+ as_bad (_("return column number %d overflows in CIE version 1"),
+ cie->return_column);
+ out_one (cie->return_column);
+ }
else
out_uleb128 (cie->return_column);
if (eh_frame)
if (cie->per_encoding != DW_EH_PE_omit)
augmentation_size += 1 + encoding_size (cie->per_encoding);
out_uleb128 (augmentation_size); /* Augmentation size. */
+
+ emit_expr_encoded (&cie->personality, cie->per_encoding, TRUE);
+
+ if (cie->lsda_encoding != DW_EH_PE_omit)
+ out_one (cie->lsda_encoding);
}
- 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)
- {
-#if CFI_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);
switch (DWARF2_FDE_RELOC_SIZE)
{
#if CFI_DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
enc |= DW_EH_PE_pcrel;
#endif
+#ifdef DWARF2_FDE_RELOC_ENCODING
+ /* Allow target to override encoding. */
+ enc = DWARF2_FDE_RELOC_ENCODING (enc);
+#endif
+ cie->fde_encoding = enc;
if (eh_frame)
out_one (enc);
if (cie->first)
- for (i = cie->first; i != cie->last; i = i->next)
- output_cfi_insn (i);
+ {
+ for (i = cie->first; i != cie->last; i = i->next)
+ {
+ if (CUR_SEG (i) != CUR_SEG (cie))
+ continue;
+ output_cfi_insn (i);
+ }
+ }
frag_align (align, DW_CFA_nop, 0);
symbol_set_value_now (end_address);
expressionS exp;
offsetT augmentation_size;
enum dwarf2_format fmt = DWARF2_FORMAT (now_seg);
- int offset_size;
- int addr_size;
+ unsigned int offset_size;
+ unsigned int addr_size;
after_size_address = symbol_temp_make ();
end_address = symbol_temp_make ();
if (eh_frame)
{
+ exp.X_op = O_subtract;
exp.X_add_symbol = after_size_address;
exp.X_op_symbol = cie->start_address;
+ exp.X_add_number = 0;
+ emit_expr (&exp, offset_size); /* CIE offset. */
}
else
{
- exp.X_op = O_symbol;
- exp.X_add_symbol = cie->start_address;
- exp.X_op_symbol = NULL;
+ TC_DWARF2_EMIT_OFFSET (cie->start_address, offset_size);
}
- emit_expr (&exp, offset_size); /* CIE offset. */
+ exp.X_op = O_symbol;
if (eh_frame)
{
+ bfd_reloc_code_real_type code
+ = tc_cfi_reloc_for_encoding (cie->fde_encoding);
+ addr_size = DWARF2_FDE_RELOC_SIZE;
+ if (code != BFD_RELOC_NONE)
+ {
+ reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, code);
+ char *p = frag_more (addr_size);
+ gas_assert (addr_size == (unsigned) howto->bitsize / 8);
+ md_number_to_chars (p, 0, addr_size);
+ fix_new (frag_now, p - frag_now->fr_literal, addr_size,
+ fde->start_address, 0, howto->pc_relative, code);
+ }
+ else
+ {
+ exp.X_op = O_subtract;
+ exp.X_add_number = 0;
#if CFI_DIFF_EXPR_OK
- exp.X_add_symbol = fde->start_address;
- exp.X_op_symbol = symbol_temp_new_now ();
- emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
+ exp.X_add_symbol = fde->start_address;
+ exp.X_op_symbol = symbol_temp_new_now ();
+ emit_expr (&exp, addr_size); /* Code offset. */
#else
- exp.X_op = O_symbol;
- exp.X_add_symbol = fde->start_address;
- exp.X_op_symbol = NULL;
-#ifdef tc_cfi_emit_pcrel_expr
- tc_cfi_emit_pcrel_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = fde->start_address;
+
+#if defined(tc_cfi_emit_pcrel_expr)
+ tc_cfi_emit_pcrel_expr (&exp, addr_size); /* Code offset. */
#else
- emit_expr (&exp, DWARF2_FDE_RELOC_SIZE); /* Code offset. */
+ emit_expr (&exp, addr_size); /* Code offset. */
#endif
#endif
- addr_size = DWARF2_FDE_RELOC_SIZE;
+ }
}
else
{
+ exp.X_add_number = 0;
exp.X_add_symbol = fde->start_address;
addr_size = DWARF2_ADDR_SIZE (stdoutput);
emit_expr (&exp, addr_size);
exp.X_op = O_subtract;
exp.X_add_symbol = fde->end_address;
exp.X_op_symbol = fde->start_address; /* Code length. */
+ exp.X_add_number = 0;
emit_expr (&exp, addr_size);
augmentation_size = encoding_size (fde->lsda_encoding);
if (eh_frame)
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)
- {
-#if CFI_DIFF_LSDA_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);
- }
+ emit_expr_encoded (&fde->lsda, cie->lsda_encoding, FALSE);
for (; first; first = first->next)
- output_cfi_insn (first);
+ if (CUR_SEG (first) == CUR_SEG (fde))
+ output_cfi_insn (first);
frag_align (align, DW_CFA_nop, 0);
symbol_set_value_now (end_address);
for (cie = cie_root; cie; cie = cie->next)
{
+ if (CUR_SEG (cie) != CUR_SEG (fde))
+ continue;
+#ifdef tc_cie_fde_equivalent_extra
+ if (!tc_cie_fde_equivalent_extra (cie, fde))
+ continue;
+#endif
if (cie->return_column != fde->return_column
|| cie->signal_frame != fde->signal_frame
|| cie->per_encoding != fde->per_encoding
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)
+ || (cie->personality.X_add_number
+ != fde->personality.X_add_number))
continue;
switch (cie->personality.X_op)
{
case CFI_escape:
case CFI_val_encoded_addr:
+ case CFI_label:
/* Don't bother matching these for now. */
goto fail;
|| j->insn == DW_CFA_advance_loc
|| j->insn == DW_CFA_remember_state
|| j->insn == CFI_escape
- || j->insn == CFI_val_encoded_addr))
+ || j->insn == CFI_val_encoded_addr
+ || j->insn == CFI_label))
{
*pfirst = j;
return cie;
fail:;
}
- cie = (struct cie_entry *) xmalloc (sizeof (struct cie_entry));
+ cie = XNEW (struct cie_entry);
cie->next = cie_root;
cie_root = cie;
+ SET_CUR_SEG (cie, CUR_SEG (fde));
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;
+#ifdef tc_cie_entry_init_extra
+ tc_cie_entry_init_extra (cie, fde)
+#endif
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_val_encoded_addr)
+ || i->insn == CFI_val_encoded_addr
+ || i->insn == CFI_label)
break;
cie->last = i;
#ifdef md_reg_eh_frame_to_debug_frame
static void
-cfi_change_reg_numbers (struct cfi_insn_data *insn)
+cfi_change_reg_numbers (struct cfi_insn_data *insn, segT ccseg)
{
for (; insn; insn = insn->next)
- switch (insn->insn)
- {
- case DW_CFA_advance_loc:
- case DW_CFA_def_cfa_offset:
- case DW_CFA_remember_state:
- case DW_CFA_restore_state:
- case DW_CFA_GNU_window_save:
- case CFI_escape:
- break;
+ {
+ if (CUR_SEG (insn) != ccseg)
+ continue;
+ switch (insn->insn)
+ {
+ case DW_CFA_advance_loc:
+ case DW_CFA_def_cfa_offset:
+ case DW_CFA_remember_state:
+ case DW_CFA_restore_state:
+ case DW_CFA_GNU_window_save:
+ case CFI_escape:
+ case CFI_label:
+ break;
- case DW_CFA_def_cfa:
- case DW_CFA_offset:
- insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg);
- break;
+ case DW_CFA_def_cfa:
+ case DW_CFA_offset:
+ insn->u.ri.reg = md_reg_eh_frame_to_debug_frame (insn->u.ri.reg);
+ break;
- case DW_CFA_def_cfa_register:
- case DW_CFA_undefined:
- case DW_CFA_same_value:
- case DW_CFA_restore:
- insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r);
- break;
+ case DW_CFA_def_cfa_register:
+ case DW_CFA_undefined:
+ case DW_CFA_same_value:
+ case DW_CFA_restore:
+ insn->u.r = md_reg_eh_frame_to_debug_frame (insn->u.r);
+ break;
- case DW_CFA_register:
- insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1);
- insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2);
- break;
+ case DW_CFA_register:
+ insn->u.rr.reg1 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg1);
+ insn->u.rr.reg2 = md_reg_eh_frame_to_debug_frame (insn->u.rr.reg2);
+ break;
- case CFI_val_encoded_addr:
- insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg);
- break;
+ case CFI_val_encoded_addr:
+ insn->u.ea.reg = md_reg_eh_frame_to_debug_frame (insn->u.ea.reg);
+ break;
- default:
- abort ();
- }
+ default:
+ abort ();
+ }
+ }
}
#else
-#define cfi_change_reg_numbers(insn) do { } while (0)
+#define cfi_change_reg_numbers(insn, cseg) do { } while (0)
+#endif
+
+#if SUPPORT_COMPACT_EH
+static void
+cfi_emit_eh_header (symbolS *sym, bfd_vma addend)
+{
+ expressionS exp;
+
+ exp.X_add_number = addend;
+ exp.X_add_symbol = sym;
+ emit_expr_encoded (&exp, DW_EH_PE_sdata4 | DW_EH_PE_pcrel, FALSE);
+}
+
+static void
+output_eh_header (struct fde_entry *fde)
+{
+ char *p;
+ bfd_vma addend;
+
+ if (fde->eh_header_type == EH_COMPACT_INLINE)
+ addend = 0;
+ else
+ addend = 1;
+
+ cfi_emit_eh_header (fde->start_address, addend);
+
+ if (fde->eh_header_type == EH_COMPACT_INLINE)
+ {
+ p = frag_more (4);
+ /* Inline entries always use PR1. */
+ *(p++) = 1;
+ memcpy(p, fde->eh_data, 3);
+ }
+ else
+ {
+ if (fde->eh_header_type == EH_COMPACT_LEGACY)
+ addend = 1;
+ else if (fde->eh_header_type == EH_COMPACT_OUTLINE
+ || fde->eh_header_type == EH_COMPACT_OUTLINE_DONE)
+ addend = 0;
+ else
+ abort ();
+ cfi_emit_eh_header (fde->eh_loc, addend);
+ }
+}
#endif
void
cfi_finish (void)
{
- segT cfi_seg;
+ struct cie_entry *cie, *cie_next;
+ segT cfi_seg, ccseg;
struct fde_entry *fde;
- int save_flag_traditional_format;
+ struct cfi_insn_data *first;
+ int save_flag_traditional_format, seek_next_seg;
if (all_fde_data == 0)
return;
- if ((cfi_sections & CFI_EMIT_eh_frame) != 0)
+ cfi_sections_set = TRUE;
+ if ((all_cfi_sections & CFI_EMIT_eh_frame) != 0
+ || (all_cfi_sections & CFI_EMIT_eh_frame_compact) != 0)
{
- /* Open .eh_frame section. */
- cfi_seg = subseg_new (".eh_frame", 0);
- bfd_set_section_flags (stdoutput, cfi_seg,
- SEC_ALLOC | SEC_LOAD | SEC_DATA
- | DWARF2_EH_FRAME_READ_ONLY);
- subseg_set (cfi_seg, 0);
- record_alignment (cfi_seg, EH_FRAME_ALIGNMENT);
+ /* Make sure check_eh_frame doesn't do anything with our output. */
+ save_flag_traditional_format = flag_traditional_format;
+ flag_traditional_format = 1;
+ if (!EH_FRAME_LINKONCE)
+ {
+ /* Open .eh_frame section. */
+ cfi_seg = get_cfi_seg (NULL, ".eh_frame",
+ (SEC_ALLOC | SEC_LOAD | SEC_DATA
+ | DWARF2_EH_FRAME_READ_ONLY),
+ EH_FRAME_ALIGNMENT);
#ifdef md_fix_up_eh_frame
- md_fix_up_eh_frame (cfi_seg);
+ md_fix_up_eh_frame (cfi_seg);
+#else
+ (void) 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;
+ do
+ {
+ ccseg = NULL;
+ seek_next_seg = 0;
+
+ for (cie = cie_root; cie; cie = cie_next)
+ {
+ cie_next = cie->next;
+ free ((void *) cie);
+ }
+ cie_root = NULL;
- for (fde = all_fde_data; fde ; fde = fde->next)
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ {
+ if ((fde->sections & CFI_EMIT_eh_frame) == 0
+ && (fde->sections & CFI_EMIT_eh_frame_compact) == 0)
+ continue;
+
+#if SUPPORT_COMPACT_EH
+ /* Emit a LEGACY format header if we have processed all
+ of the .cfi directives without encountering either inline or
+ out-of-line compact unwinding opcodes. */
+ if (fde->eh_header_type == EH_COMPACT_HAS_LSDA
+ || fde->eh_header_type == EH_COMPACT_UNKNOWN)
+ fde->eh_header_type = EH_COMPACT_LEGACY;
+
+ if (fde->eh_header_type != EH_COMPACT_LEGACY)
+ continue;
+#endif
+ if (EH_FRAME_LINKONCE)
+ {
+ if (HANDLED (fde))
+ continue;
+ if (seek_next_seg && CUR_SEG (fde) != ccseg)
+ {
+ seek_next_seg = 2;
+ continue;
+ }
+ if (!seek_next_seg)
+ {
+ ccseg = CUR_SEG (fde);
+ /* Open .eh_frame section. */
+ cfi_seg = get_cfi_seg (ccseg, ".eh_frame",
+ (SEC_ALLOC | SEC_LOAD | SEC_DATA
+ | DWARF2_EH_FRAME_READ_ONLY),
+ EH_FRAME_ALIGNMENT);
+#ifdef md_fix_up_eh_frame
+ md_fix_up_eh_frame (cfi_seg);
+#else
+ (void) cfi_seg;
+#endif
+ seek_next_seg = 1;
+ }
+ SET_HANDLED (fde, 1);
+ }
+
+ if (fde->end_address == NULL)
+ {
+ as_bad (_("open CFI at the end of file; "
+ "missing .cfi_endproc directive"));
+ fde->end_address = fde->start_address;
+ }
+
+ cie = select_cie_for_fde (fde, TRUE, &first, 2);
+ fde->eh_loc = symbol_temp_new_now ();
+ output_fde (fde, cie, TRUE, first,
+ fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
+ }
+ }
+ while (EH_FRAME_LINKONCE && seek_next_seg == 2);
+
+ if (EH_FRAME_LINKONCE)
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ SET_HANDLED (fde, 0);
+
+#if SUPPORT_COMPACT_EH
+ if (compact_eh)
{
- struct cfi_insn_data *first;
- struct cie_entry *cie;
+ /* Create remaining out of line table entries. */
+ do
+ {
+ ccseg = NULL;
+ seek_next_seg = 0;
+
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ {
+ if ((fde->sections & CFI_EMIT_eh_frame) == 0
+ && (fde->sections & CFI_EMIT_eh_frame_compact) == 0)
+ continue;
+
+ if (fde->eh_header_type != EH_COMPACT_OUTLINE)
+ continue;
+ if (HANDLED (fde))
+ continue;
+ if (seek_next_seg && CUR_SEG (fde) != ccseg)
+ {
+ seek_next_seg = 2;
+ continue;
+ }
+ if (!seek_next_seg)
+ {
+ ccseg = CUR_SEG (fde);
+ /* Open .gnu_extab section. */
+ get_cfi_seg (ccseg, ".gnu_extab",
+ (SEC_ALLOC | SEC_LOAD | SEC_DATA
+ | DWARF2_EH_FRAME_READ_ONLY),
+ 1);
+ seek_next_seg = 1;
+ }
+ SET_HANDLED (fde, 1);
+
+ frag_align (1, 0, 0);
+ record_alignment (now_seg, 1);
+ output_compact_unwind_data (fde, 1);
+ }
+ }
+ while (EH_FRAME_LINKONCE && seek_next_seg == 2);
+
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ SET_HANDLED (fde, 0);
- if (fde->end_address == NULL)
+ /* Create index table fragments. */
+ do
{
- as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
- fde->end_address = fde->start_address;
+ ccseg = NULL;
+ seek_next_seg = 0;
+
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ {
+ if ((fde->sections & CFI_EMIT_eh_frame) == 0
+ && (fde->sections & CFI_EMIT_eh_frame_compact) == 0)
+ continue;
+
+ if (HANDLED (fde))
+ continue;
+ if (seek_next_seg && CUR_SEG (fde) != ccseg)
+ {
+ seek_next_seg = 2;
+ continue;
+ }
+ if (!seek_next_seg)
+ {
+ ccseg = CUR_SEG (fde);
+ /* Open .eh_frame_entry section. */
+ cfi_seg = get_cfi_seg (ccseg, ".eh_frame_entry",
+ (SEC_ALLOC | SEC_LOAD | SEC_DATA
+ | DWARF2_EH_FRAME_READ_ONLY),
+ 2);
+ seek_next_seg = 1;
+ }
+ SET_HANDLED (fde, 1);
+
+ output_eh_header (fde);
+ }
}
+ while (seek_next_seg == 2);
- cie = select_cie_for_fde (fde, TRUE, &first, 2);
- output_fde (fde, cie, TRUE, first,
- fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ SET_HANDLED (fde, 0);
}
+#endif /* SUPPORT_COMPACT_EH */
flag_traditional_format = save_flag_traditional_format;
}
- if ((cfi_sections & CFI_EMIT_debug_frame) != 0)
+ cfi_sections_set = TRUE;
+ if ((all_cfi_sections & CFI_EMIT_debug_frame) != 0)
{
- struct cie_entry *cie, *cie_next;
int alignment = ffs (DWARF2_ADDR_SIZE (stdoutput)) - 1;
- for (cie = cie_root; cie; cie = cie_next)
- {
- cie_next = cie->next;
- free ((void *) cie);
- }
- cie_root = NULL;
+ if (!SUPPORT_FRAME_LINKONCE)
+ get_cfi_seg (NULL, ".debug_frame",
+ SEC_READONLY | SEC_DEBUGGING,
+ alignment);
- /* Open .debug_frame section. */
- cfi_seg = subseg_new (".debug_frame", 0);
- bfd_set_section_flags (stdoutput, cfi_seg,
- SEC_READONLY | SEC_DEBUGGING);
- subseg_set (cfi_seg, 0);
- record_alignment (cfi_seg, alignment);
-
- for (fde = all_fde_data; fde ; fde = fde->next)
+ do
{
- struct cfi_insn_data *first;
+ ccseg = NULL;
+ seek_next_seg = 0;
- if (fde->end_address == NULL)
+ for (cie = cie_root; cie; cie = cie_next)
{
- as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
- fde->end_address = fde->start_address;
+ cie_next = cie->next;
+ free ((void *) cie);
}
+ cie_root = NULL;
- fde->per_encoding = DW_EH_PE_omit;
- fde->lsda_encoding = DW_EH_PE_omit;
- cfi_change_reg_numbers (fde->data);
- cie = select_cie_for_fde (fde, FALSE, &first, alignment);
- output_fde (fde, cie, FALSE, first, alignment);
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ {
+ if ((fde->sections & CFI_EMIT_debug_frame) == 0)
+ continue;
+
+ if (SUPPORT_FRAME_LINKONCE)
+ {
+ if (HANDLED (fde))
+ continue;
+ if (seek_next_seg && CUR_SEG (fde) != ccseg)
+ {
+ seek_next_seg = 2;
+ continue;
+ }
+ if (!seek_next_seg)
+ {
+ ccseg = CUR_SEG (fde);
+ /* Open .debug_frame section. */
+ get_cfi_seg (ccseg, ".debug_frame",
+ SEC_READONLY | SEC_DEBUGGING,
+ alignment);
+ seek_next_seg = 1;
+ }
+ SET_HANDLED (fde, 1);
+ }
+ if (fde->end_address == NULL)
+ {
+ as_bad (_("open CFI at the end of file; "
+ "missing .cfi_endproc directive"));
+ fde->end_address = fde->start_address;
+ }
+
+ fde->per_encoding = DW_EH_PE_omit;
+ fde->lsda_encoding = DW_EH_PE_omit;
+ cfi_change_reg_numbers (fde->data, ccseg);
+ cie = select_cie_for_fde (fde, FALSE, &first, alignment);
+ output_fde (fde, cie, FALSE, first, alignment);
+ }
}
+ while (SUPPORT_FRAME_LINKONCE && seek_next_seg == 2);
+
+ if (SUPPORT_FRAME_LINKONCE)
+ for (fde = all_fde_data; fde ; fde = fde->next)
+ SET_HANDLED (fde, 0);
}
}
#else /* TARGET_USE_CFIPOP */
+
+/* Emit an intelligible error message for missing support. */
+
+static void
+dot_cfi_dummy (int ignored ATTRIBUTE_UNUSED)
+{
+ as_bad (_("CFI is not supported for this target"));
+ ignore_rest_of_line ();
+}
+
+const pseudo_typeS cfi_pseudo_table[] =
+ {
+ { "cfi_sections", dot_cfi_dummy, 0 },
+ { "cfi_startproc", dot_cfi_dummy, 0 },
+ { "cfi_endproc", dot_cfi_dummy, 0 },
+ { "cfi_fde_data", dot_cfi_dummy, 0 },
+ { "cfi_def_cfa", dot_cfi_dummy, 0 },
+ { "cfi_def_cfa_register", dot_cfi_dummy, 0 },
+ { "cfi_def_cfa_offset", dot_cfi_dummy, 0 },
+ { "cfi_adjust_cfa_offset", dot_cfi_dummy, 0 },
+ { "cfi_offset", dot_cfi_dummy, 0 },
+ { "cfi_rel_offset", dot_cfi_dummy, 0 },
+ { "cfi_register", dot_cfi_dummy, 0 },
+ { "cfi_return_column", dot_cfi_dummy, 0 },
+ { "cfi_restore", dot_cfi_dummy, 0 },
+ { "cfi_undefined", dot_cfi_dummy, 0 },
+ { "cfi_same_value", dot_cfi_dummy, 0 },
+ { "cfi_remember_state", dot_cfi_dummy, 0 },
+ { "cfi_restore_state", dot_cfi_dummy, 0 },
+ { "cfi_window_save", dot_cfi_dummy, 0 },
+ { "cfi_escape", dot_cfi_dummy, 0 },
+ { "cfi_signal_frame", dot_cfi_dummy, 0 },
+ { "cfi_personality", dot_cfi_dummy, 0 },
+ { "cfi_personality_id", dot_cfi_dummy, 0 },
+ { "cfi_lsda", dot_cfi_dummy, 0 },
+ { "cfi_val_encoded_addr", dot_cfi_dummy, 0 },
+ { "cfi_label", dot_cfi_dummy, 0 },
+ { "cfi_inline_lsda", dot_cfi_dummy, 0 },
+ { "cfi_val_offset", dot_cfi_dummy, 0 },
+ { NULL, NULL, 0 }
+ };
+
void
cfi_finish (void)
{
projects / deliverable / binutils-gdb.git / blobdiff