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/* dw2gencfi.h - Support for generating Dwarf2 CFI information.
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/* dw2gencfi.h - Support for generating Dwarf2 CFI information.
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   Copyright 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
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   Copyright (C) 2003-2015 Free Software Foundation, Inc.
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   Contributed by Michal Ludvig
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   Contributed by Michal Ludvig
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   This file is part of GAS, the GNU Assembler.
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   This file is part of GAS, the GNU Assembler.
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/* Entry points for backends to add unwind information.  */
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/* Entry points for backends to add unwind information.  */
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extern void cfi_new_fde (struct symbol *);
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extern void cfi_new_fde (struct symbol *);
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extern void cfi_end_fde (struct symbol *);
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extern void cfi_end_fde (struct symbol *);
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extern void cfi_set_return_column (unsigned);
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extern void cfi_set_return_column (unsigned);
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extern void cfi_set_sections (void);
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extern void cfi_add_advance_loc (struct symbol *);
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extern void cfi_add_advance_loc (struct symbol *);
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extern void cfi_add_label (const char *);
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extern void cfi_add_CFA_offset (unsigned, offsetT);
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extern void cfi_add_CFA_offset (unsigned, offsetT);
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extern void cfi_add_CFA_def_cfa (unsigned, offsetT);
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extern void cfi_add_CFA_def_cfa (unsigned, offsetT);
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#define SUPPORT_FRAME_LINKONCE 1
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#define SUPPORT_FRAME_LINKONCE 1
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#else
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#else
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#define SUPPORT_FRAME_LINKONCE 0
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#define SUPPORT_FRAME_LINKONCE 0
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#endif
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#endif
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#ifdef tc_cfi_reloc_for_encoding
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#define SUPPORT_COMPACT_EH 1
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#else
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#define SUPPORT_COMPACT_EH 0
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#endif
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#define MULTIPLE_FRAME_SECTIONS (SUPPORT_FRAME_LINKONCE || SUPPORT_COMPACT_EH)
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struct cfi_insn_data
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struct cfi_insn_data
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{
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{
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  struct cfi_insn_data *next;
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  struct cfi_insn_data *next;
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#if SUPPORT_FRAME_LINKONCE
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#if MULTIPLE_FRAME_SECTIONS
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  segT cur_seg;
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  segT cur_seg;
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#endif
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#endif
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  int insn;
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  int insn;
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  union
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  union
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    struct
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    struct
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    {
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    {
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      unsigned reg, encoding;
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      unsigned reg, encoding;
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      expressionS exp;
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      expressionS exp;
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    } ea;
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    } ea;
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    const char *sym_name;
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  } u;
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  } u;
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};
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};
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/* An enumeration describing the Compact EH header format.  The least
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   significant bit is used to distinguish the entries.
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   Inline Compact:			Function offset [0]
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					Four chars of unwind data.
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   Out-of-line Compact:			Function offset [1]
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					Compact unwind data offset [0]
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   Legacy:				Function offset [1]
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					Unwind data offset [1]
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   The header type is initialized to EH_COMPACT_UNKNOWN until the
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   format is discovered by encountering a .fde_data entry.
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   Failure to find a .fde_data entry will cause an EH_COMPACT_LEGACY
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   header to be generated.  */
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enum {
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  EH_COMPACT_UNKNOWN,
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  EH_COMPACT_LEGACY,
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  EH_COMPACT_INLINE,
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  EH_COMPACT_OUTLINE,
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  EH_COMPACT_OUTLINE_DONE,
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  /* Outline if .cfi_inline_lsda used, otherwise legacy FDE.  */
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  EH_COMPACT_HAS_LSDA
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};
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struct fde_entry
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struct fde_entry
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{
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{
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  struct fde_entry *next;
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  struct fde_entry *next;
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#if SUPPORT_FRAME_LINKONCE
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#if MULTIPLE_FRAME_SECTIONS
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  segT cur_seg;
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  segT cur_seg;
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#endif
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#endif
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  symbolS *start_address;
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  symbolS *start_address;
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  symbolS *end_address;
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  symbolS *end_address;
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  struct cfi_insn_data *data;
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  struct cfi_insn_data *data;
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  struct cfi_insn_data **last;
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  struct cfi_insn_data **last;
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  unsigned char per_encoding;
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  unsigned char per_encoding;
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  unsigned char lsda_encoding;
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  unsigned char lsda_encoding;
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  int personality_id;
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  expressionS personality;
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  expressionS personality;
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  expressionS lsda;
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  expressionS lsda;
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  unsigned int return_column;
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  unsigned int return_column;
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  unsigned int signal_frame;
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  unsigned int signal_frame;
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#if SUPPORT_FRAME_LINKONCE
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#if MULTIPLE_FRAME_SECTIONS
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  int handled;
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  int handled;
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#endif
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  int eh_header_type;
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  /* Compact unwinding opcodes, not including the PR byte or LSDA.  */
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  int eh_data_size;
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  bfd_byte *eh_data;
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  /* For out of line tables and FDEs.  */
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  symbolS *eh_loc;
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#endif
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  int sections;
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};
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};
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#define CFI_return_column	0x101
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#define CFI_return_column	0x101
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#define CFI_rel_offset		0x102
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#define CFI_rel_offset		0x102
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#define CFI_escape		0x103
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#define CFI_escape		0x103
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#define CFI_signal_frame	0x104
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#define CFI_signal_frame	0x104
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#define CFI_val_encoded_addr	0x105
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#define CFI_val_encoded_addr	0x105
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#define CFI_label		0x106
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/* By default emit .eh_frame only, not .debug_frame.  */
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#define CFI_EMIT_eh_frame               (1 << 0)
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#define CFI_EMIT_debug_frame            (1 << 1)
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#define CFI_EMIT_target                 (1 << 2)
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#define CFI_EMIT_eh_frame_compact       (1 << 3)
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