X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gas%2Fdw2gencfi.h;h=3af2875767fa899a12d3f7a1f77414d064594a51;hb=030a2e78acf66c5c12e073ec3887a167da7a7195;hp=1c724540e6cc678f88b35f0fe2aa1d7933b3490c;hpb=54cfded08ec4835361d381d602fe3f845a45c118;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/dw2gencfi.h b/gas/dw2gencfi.h index 1c724540e6..3af2875767 100644 --- a/gas/dw2gencfi.h +++ b/gas/dw2gencfi.h @@ -1,12 +1,12 @@ /* 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 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, @@ -16,85 +16,189 @@ 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 cfi_config { - /* Target address length in bytes. (usually 4 or 8). - Round it up for archs like S/390 with 31b addresses. */ - unsigned int addr_length; +struct symbol; - /* Alignment of .eh_frame blocks in bytes (usually 1, 4 or 8). */ - unsigned int eh_align; - - /* Code alignment (1 for x86/amd64 machines, 4 or 8 for - RISC machines). Consult Dwarf2 standard for details. */ - int code_align; - - /* Data (stack) alignment (-4 on x86, -8 on amd64, something - positive on archs where stack grows up). Consult Dwarf2 - standard for details. */ - int data_align; - - /* Return address column (0x8 on x86, 0x10 on amd64). Consult - Dwarf2 standard for details. */ - int ra_column; +extern const pseudo_typeS cfi_pseudo_table[]; - /* Relocation type for init_addr FDE record. (BFD_RELOC_64 - on amd64). */ - int reloc_type; +/* cfi_finish() is called at the end of file. It will complain if + the last CFI wasn't properly closed by .cfi_endproc. */ +extern void cfi_finish (void); + +/* Entry points for backends to add unwind information. */ +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_def_cfa_offset (offsetT); +extern void cfi_add_CFA_restore (unsigned); +extern void cfi_add_CFA_undefined (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); + +/* 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; }; -/* Codes of CFI instructions taken from Dwarf2 standard. */ -enum cfi_insn { - CFA_nop = DW_CFA_nop, - CFA_set_loc = DW_CFA_set_loc, - CFA_advance_loc1 = DW_CFA_advance_loc1, - CFA_advance_loc2 = DW_CFA_advance_loc2, - CFA_advance_loc4 = DW_CFA_advance_loc4, - CFA_offset_extended = DW_CFA_offset_extended, - CFA_resotre_extended = DW_CFA_restore_extended, - CFA_undefined = DW_CFA_undefined, - CFA_same_value = DW_CFA_same_value, - CFA_register = DW_CFA_register, - CFA_remember_state = DW_CFA_remember_state, - CFA_restore_state = DW_CFA_restore_state, - CFA_def_cfa = DW_CFA_def_cfa, - CFA_def_cfa_register = DW_CFA_def_cfa_register, - CFA_def_cfa_offset = DW_CFA_def_cfa_offset, - CFA_advance_loc = DW_CFA_advance_loc, - CFA_offset = DW_CFA_offset, - CFA_restore = DW_CFA_restore, - - /* These don't belong to the standard. */ - CFI_startproc = 0xff00, - CFI_endproc = 0xff01, - CFI_adjust_cfa_offset = 0xff10, - CFI_verbose = 0xffff +/* 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 }; -extern const pseudo_typeS cfi_pseudo_table[]; - -/* Insert .cfi_* directives to the list of pseudo-ops. */ -void cfi_pop_insert PARAMS ((void)); +/* Stack of old CFI data, for save/restore. */ +struct cfa_save_data +{ + struct cfa_save_data *next; + offsetT cfa_offset; +}; -/* Set/change setup of the CFI machinery. This change won't - affect already generated CIEs/FDEs. */ -void cfi_set_config PARAMS ((struct cfi_config *cfg)); +/* 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; +}; -/* cfi_finish() is called at the end of file. It will complain if - the last CFI wasn't properly closed by .cfi_endproc. */ -void cfi_finish PARAMS ((void)); +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 +}; -/* Add CFI instruction to the list of instructions - of the current frame. cfi_add_insn() could be used - in tc_cfi_frame_initial_instructions() to add instructions - needed for every frame (ie. those that usually go to CIE). */ -void cfi_add_insn (enum cfi_insn insn, long param0, long param1); +/* 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 */