/* dw2gencfi.h - Support for generating Dwarf2 CFI information.
- Copyright 2003 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.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#ifndef DW2GENCFI_H
#define DW2GENCFI_H
-#include "elf/dwarf2.h"
+#include "dwarf2.h"
struct symbol;
extern void cfi_new_fde (struct symbol *);
extern void cfi_end_fde (struct symbol *);
extern void cfi_set_return_column (unsigned);
+extern void cfi_set_sections (void);
extern void cfi_add_advance_loc (struct symbol *);
+extern void cfi_add_label (const char *);
extern void cfi_add_CFA_offset (unsigned, offsetT);
+extern void cfi_add_CFA_val_offset (unsigned, offsetT);
extern void cfi_add_CFA_def_cfa (unsigned, offsetT);
extern void cfi_add_CFA_register (unsigned, unsigned);
extern void cfi_add_CFA_def_cfa_register (unsigned);
extern void cfi_add_CFA_same_value (unsigned);
extern void cfi_add_CFA_remember_state (void);
extern void cfi_add_CFA_restore_state (void);
-extern void cfi_add_CFA_nop (void);
+
+/* Structures for md_cfi_end. */
+
+#if defined (TE_PE) || defined (TE_PEP)
+#define SUPPORT_FRAME_LINKONCE 1
+#else
+#define SUPPORT_FRAME_LINKONCE 0
+#endif
+
+#ifdef tc_cfi_reloc_for_encoding
+#define SUPPORT_COMPACT_EH 1
+#else
+#define SUPPORT_COMPACT_EH 0
+#endif
+
+#define MULTIPLE_FRAME_SECTIONS (SUPPORT_FRAME_LINKONCE || SUPPORT_COMPACT_EH)
+
+struct cfi_insn_data
+{
+ struct cfi_insn_data *next;
+#if MULTIPLE_FRAME_SECTIONS
+ segT cur_seg;
+#endif
+ int insn;
+ union
+ {
+ struct
+ {
+ unsigned reg;
+ offsetT offset;
+ } ri;
+
+ struct
+ {
+ unsigned reg1;
+ unsigned reg2;
+ } rr;
+
+ unsigned r;
+ offsetT i;
+
+ struct
+ {
+ symbolS *lab1;
+ symbolS *lab2;
+ } ll;
+
+ struct cfi_escape_data *esc;
+
+ struct
+ {
+ unsigned reg, encoding;
+ expressionS exp;
+ } ea;
+
+ const char *sym_name;
+ } u;
+};
+
+/* An enumeration describing the Compact EH header format. The least
+ significant bit is used to distinguish the entries.
+
+ Inline Compact: Function offset [0]
+ Four chars of unwind data.
+ Out-of-line Compact: Function offset [1]
+ Compact unwind data offset [0]
+ Legacy: Function offset [1]
+ Unwind data offset [1]
+
+ The header type is initialized to EH_COMPACT_UNKNOWN until the
+ format is discovered by encountering a .fde_data entry.
+ Failure to find a .fde_data entry will cause an EH_COMPACT_LEGACY
+ header to be generated. */
+
+enum {
+ EH_COMPACT_UNKNOWN,
+ EH_COMPACT_LEGACY,
+ EH_COMPACT_INLINE,
+ EH_COMPACT_OUTLINE,
+ EH_COMPACT_OUTLINE_DONE,
+ /* Outline if .cfi_inline_lsda used, otherwise legacy FDE. */
+ EH_COMPACT_HAS_LSDA
+};
+
+/* 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;
+};
+
+struct fde_entry
+{
+ struct fde_entry *next;
+#if MULTIPLE_FRAME_SECTIONS
+ segT cur_seg;
+#endif
+ symbolS *start_address;
+ symbolS *end_address;
+ struct cfi_insn_data *data;
+ struct cfi_insn_data **last;
+ unsigned char per_encoding;
+ unsigned char lsda_encoding;
+ int personality_id;
+ expressionS personality;
+ expressionS lsda;
+ unsigned int return_column;
+ unsigned int signal_frame;
+#if MULTIPLE_FRAME_SECTIONS
+ int handled;
+#endif
+ int eh_header_type;
+ /* Compact unwinding opcodes, not including the PR byte or LSDA. */
+ int eh_data_size;
+ bfd_byte *eh_data;
+ /* For out of line tables and FDEs. */
+ symbolS *eh_loc;
+ int sections;
+#ifdef tc_fde_entry_extras
+ tc_fde_entry_extras
+#endif
+};
+
+/* The list of all FDEs that have been collected. */
+extern struct fde_entry *all_fde_data;
+
+/* 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
+#define CFI_label 0x106
+
+/* By default emit .eh_frame only, not .debug_frame. */
+#define CFI_EMIT_eh_frame (1 << 0)
+#define CFI_EMIT_debug_frame (1 << 1)
+#define CFI_EMIT_target (1 << 2)
+#define CFI_EMIT_eh_frame_compact (1 << 3)
#endif /* DW2GENCFI_H */
projects / deliverable / binutils-gdb.git / blobdiff