/* dw2gencfi.c - Support for generating Dwarf2 CFI information.
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/* dw2gencfi.c - Support for generating Dwarf2 CFI information.
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Copyright 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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Copyright 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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Contributed by Michal Ludvig <mludvig@suse.cz>
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Contributed by Michal Ludvig <mludvig@suse.cz>
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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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GAS is free software; you can redistribute it and/or modify
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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any later version.
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GAS is distributed in the hope that it will be useful,
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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02110-1301, USA. */
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#include "as.h"
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#include "as.h"
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#include "dw2gencfi.h"
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#include "dw2gencfi.h"
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#include "subsegs.h"
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#include "subsegs.h"
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#ifdef TARGET_USE_CFIPOP
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#ifdef TARGET_USE_CFIPOP
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/* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field
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/* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field
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of the CIE. Default to 1 if not otherwise specified. */
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of the CIE. Default to 1 if not otherwise specified. */
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#ifndef DWARF2_LINE_MIN_INSN_LENGTH
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#ifndef DWARF2_LINE_MIN_INSN_LENGTH
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# define DWARF2_LINE_MIN_INSN_LENGTH 1
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# define DWARF2_LINE_MIN_INSN_LENGTH 1
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#endif
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#endif
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#ifndef EH_FRAME_ALIGNMENT
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#ifndef EH_FRAME_ALIGNMENT
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# define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
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# define EH_FRAME_ALIGNMENT (bfd_get_arch_size (stdoutput) == 64 ? 3 : 2)
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#endif
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#endif
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#ifndef tc_cfi_frame_initial_instructions
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#ifndef tc_cfi_frame_initial_instructions
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# define tc_cfi_frame_initial_instructions() ((void)0)
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# define tc_cfi_frame_initial_instructions() ((void)0)
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#endif
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#endif
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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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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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unsigned reg;
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unsigned reg;
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offsetT offset;
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offsetT offset;
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} ri;
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} ri;
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struct {
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struct {
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unsigned reg1;
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unsigned reg1;
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unsigned reg2;
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unsigned reg2;
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} rr;
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} rr;
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unsigned r;
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unsigned r;
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offsetT i;
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offsetT i;
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struct {
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struct {
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symbolS *lab1;
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symbolS *lab1;
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symbolS *lab2;
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symbolS *lab2;
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} ll;
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} ll;
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struct cfi_escape_data {
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struct cfi_escape_data {
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struct cfi_escape_data *next;
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struct cfi_escape_data *next;
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expressionS exp;
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expressionS exp;
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} *esc;
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} *esc;
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} u;
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} u;
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};
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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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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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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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};
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};
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struct cie_entry
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struct cie_entry
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{
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{
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struct cie_entry *next;
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struct cie_entry *next;
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symbolS *start_address;
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symbolS *start_address;
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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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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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expressionS personality;
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expressionS personality;
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struct cfi_insn_data *first, *last;
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struct cfi_insn_data *first, *last;
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};
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};
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/* List of FDE entries. */
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/* List of FDE entries. */
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static struct fde_entry *all_fde_data;
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static struct fde_entry *all_fde_data;
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static struct fde_entry **last_fde_data = &all_fde_data;
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static struct fde_entry **last_fde_data = &all_fde_data;
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/* List of CIEs so that they could be reused. */
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/* List of CIEs so that they could be reused. */
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static struct cie_entry *cie_root;
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static struct cie_entry *cie_root;
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/* Stack of old CFI data, for save/restore. */
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/* Stack of old CFI data, for save/restore. */
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struct cfa_save_data
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struct cfa_save_data
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{
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{
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struct cfa_save_data *next;
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struct cfa_save_data *next;
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offsetT cfa_offset;
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offsetT cfa_offset;
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};
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};
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/* Current open FDE entry. */
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/* Current open FDE entry. */
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struct frch_cfi_data
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struct frch_cfi_data
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{
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{
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struct fde_entry *cur_fde_data;
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struct fde_entry *cur_fde_data;
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symbolS *last_address;
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symbolS *last_address;
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offsetT cur_cfa_offset;
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offsetT cur_cfa_offset;
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struct cfa_save_data *cfa_save_stack;
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struct cfa_save_data *cfa_save_stack;
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};
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};
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/* Construct a new FDE structure and add it to the end of the fde list. */
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/* Construct a new FDE structure and add it to the end of the fde list. */
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static struct fde_entry *
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static struct fde_entry *
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alloc_fde_entry (void)
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alloc_fde_entry (void)
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{
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{
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struct fde_entry *fde = xcalloc (1, sizeof (struct fde_entry));
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struct fde_entry *fde = xcalloc (1, sizeof (struct fde_entry));
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frchain_now->frch_cfi_data = xcalloc (1, sizeof (struct frch_cfi_data));
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frchain_now->frch_cfi_data = xcalloc (1, sizeof (struct frch_cfi_data));
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frchain_now->frch_cfi_data->cur_fde_data = fde;
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frchain_now->frch_cfi_data->cur_fde_data = fde;
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*last_fde_data = fde;
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*last_fde_data = fde;
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last_fde_data = &fde->next;
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last_fde_data = &fde->next;
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fde->last = &fde->data;
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fde->last = &fde->data;
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fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
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fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
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fde->per_encoding = DW_EH_PE_omit;
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fde->per_encoding = DW_EH_PE_omit;
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fde->lsda_encoding = DW_EH_PE_omit;
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fde->lsda_encoding = DW_EH_PE_omit;
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return fde;
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return fde;
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}
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}
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/* The following functions are available for a backend to construct its
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/* The following functions are available for a backend to construct its
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own unwind information, usually from legacy unwind directives. */
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own unwind information, usually from legacy unwind directives. */
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/* Construct a new INSN structure and add it to the end of the insn list
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/* Construct a new INSN structure and add it to the end of the insn list
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for the currently active FDE. */
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for the currently active FDE. */
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static struct cfi_insn_data *
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static struct cfi_insn_data *
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alloc_cfi_insn_data (void)
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alloc_cfi_insn_data (void)
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{
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{
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struct cfi_insn_data *insn = xcalloc (1, sizeof (struct cfi_insn_data));
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struct cfi_insn_data *insn = xcalloc (1, sizeof (struct cfi_insn_data));
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struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data;
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struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data;
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*cur_fde_data->last = insn;
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*cur_fde_data->last = insn;
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cur_fde_data->last = &insn->next;
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cur_fde_data->last = &insn->next;
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return insn;
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return insn;
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}
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}
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/* Construct a new FDE structure that begins at LABEL. */
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/* Construct a new FDE structure that begins at LABEL. */
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void
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void
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cfi_new_fde (symbolS *label)
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cfi_new_fde (symbolS *label)
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{
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{
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struct fde_entry *fde = alloc_fde_entry ();
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struct fde_entry *fde = alloc_fde_entry ();
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fde->start_address = label;
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fde->start_address = label;
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frchain_now->frch_cfi_data->last_address = label;
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frchain_now->frch_cfi_data->last_address = label;
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}
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}
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/* End the currently open FDE. */
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/* End the currently open FDE. */
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void
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void
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cfi_end_fde (symbolS *label)
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cfi_end_fde (symbolS *label)
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{
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{
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frchain_now->frch_cfi_data->cur_fde_data->end_address = label;
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frchain_now->frch_cfi_data->cur_fde_data->end_address = label;
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free (frchain_now->frch_cfi_data);
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free (frchain_now->frch_cfi_data);
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frchain_now->frch_cfi_data = NULL;
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frchain_now->frch_cfi_data = NULL;
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}
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}
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/* Set the return column for the current FDE. */
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/* Set the return column for the current FDE. */
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void
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void
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cfi_set_return_column (unsigned regno)
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cfi_set_return_column (unsigned regno)
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{
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{
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frchain_now->frch_cfi_data->cur_fde_data->return_column = regno;
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frchain_now->frch_cfi_data->cur_fde_data->return_column = regno;
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}
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}
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/* Universal functions to store new instructions. */
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/* Universal functions to store new instructions. */
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static void
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static void
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cfi_add_CFA_insn(int insn)
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cfi_add_CFA_insn(int insn)
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{
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{
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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insn_ptr->insn = insn;
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insn_ptr->insn = insn;
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}
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}
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static void
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static void
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cfi_add_CFA_insn_reg (int insn, unsigned regno)
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cfi_add_CFA_insn_reg (int insn, unsigned regno)
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{
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{
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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insn_ptr->insn = insn;
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insn_ptr->insn = insn;
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insn_ptr->u.r = regno;
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insn_ptr->u.r = regno;
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}
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}
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static void
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static void
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cfi_add_CFA_insn_offset (int insn, offsetT offset)
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cfi_add_CFA_insn_offset (int insn, offsetT offset)
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{
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{
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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insn_ptr->insn = insn;
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insn_ptr->insn = insn;
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insn_ptr->u.i = offset;
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insn_ptr->u.i = offset;
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}
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}
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static void
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static void
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cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2)
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cfi_add_CFA_insn_reg_reg (int insn, unsigned reg1, unsigned reg2)
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{
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{
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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insn_ptr->insn = insn;
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insn_ptr->insn = insn;
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insn_ptr->u.rr.reg1 = reg1;
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insn_ptr->u.rr.reg1 = reg1;
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insn_ptr->u.rr.reg2 = reg2;
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insn_ptr->u.rr.reg2 = reg2;
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}
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}
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static void
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static void
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cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset)
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cfi_add_CFA_insn_reg_offset (int insn, unsigned regno, offsetT offset)
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{
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{
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn_ptr = alloc_cfi_insn_data ();
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insn_ptr->insn = insn;
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insn_ptr->insn = insn;
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insn_ptr->u.ri.reg = regno;
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insn_ptr->u.ri.reg = regno;
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insn_ptr->u.ri.offset = offset;
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insn_ptr->u.ri.offset = offset;
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}
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}
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/* Add a CFI insn to advance the PC from the last address to LABEL. */
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/* Add a CFI insn to advance the PC from the last address to LABEL. */
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void
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void
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cfi_add_advance_loc (symbolS *label)
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cfi_add_advance_loc (symbolS *label)
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{
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{
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struct cfi_insn_data *insn = alloc_cfi_insn_data ();
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struct cfi_insn_data *insn = alloc_cfi_insn_data ();
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insn->insn = DW_CFA_advance_loc;
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insn->insn = DW_CFA_advance_loc;
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insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address;
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insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address;
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insn->u.ll.lab2 = label;
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insn->u.ll.lab2 = label;
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frchain_now->frch_cfi_data->last_address = label;
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frchain_now->frch_cfi_data->last_address = label;
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}
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}
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/* Add a DW_CFA_offset record to the CFI data. */
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/* Add a DW_CFA_offset record to the CFI data. */
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void
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void
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cfi_add_CFA_offset (unsigned regno, offsetT offset)
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cfi_add_CFA_offset (unsigned regno, offsetT offset)
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{
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{
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unsigned int abs_data_align;
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unsigned int abs_data_align;
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assert (DWARF2_CIE_DATA_ALIGNMENT != 0);
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assert (DWARF2_CIE_DATA_ALIGNMENT != 0);
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cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset);
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cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset);
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abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0
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abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0
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? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT);
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? -DWARF2_CIE_DATA_ALIGNMENT : DWARF2_CIE_DATA_ALIGNMENT);
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if (offset % abs_data_align)
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if (offset % abs_data_align)
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as_bad (_("register save offset not a multiple of %u"), abs_data_align);
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as_bad (_("register save offset not a multiple of %u"), abs_data_align);
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}
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}
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/* Add a DW_CFA_def_cfa record to the CFI data. */
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/* Add a DW_CFA_def_cfa record to the CFI data. */
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void
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void
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cfi_add_CFA_def_cfa (unsigned regno, offsetT offset)
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cfi_add_CFA_def_cfa (unsigned regno, offsetT offset)
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{
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{
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cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset);
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cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset);
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frchain_now->frch_cfi_data->cur_cfa_offset = offset;
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frchain_now->frch_cfi_data->cur_cfa_offset = offset;
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}
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}
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/* Add a DW_CFA_register record to the CFI data. */
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/* Add a DW_CFA_register record to the CFI data. */
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|
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void
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void
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cfi_add_CFA_register (unsigned reg1, unsigned reg2)
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cfi_add_CFA_register (unsigned reg1, unsigned reg2)
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{
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{
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cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2);
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cfi_add_CFA_insn_reg_reg (DW_CFA_register, reg1, reg2);
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}
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}
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/* Add a DW_CFA_def_cfa_register record to the CFI data. */
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/* Add a DW_CFA_def_cfa_register record to the CFI data. */
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void
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void
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cfi_add_CFA_def_cfa_register (unsigned regno)
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cfi_add_CFA_def_cfa_register (unsigned regno)
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{
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{
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cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno);
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cfi_add_CFA_insn_reg (DW_CFA_def_cfa_register, regno);
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}
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}
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/* Add a DW_CFA_def_cfa_offset record to the CFI data. */
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/* Add a DW_CFA_def_cfa_offset record to the CFI data. */
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|
|
void
|
void
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cfi_add_CFA_def_cfa_offset (offsetT offset)
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cfi_add_CFA_def_cfa_offset (offsetT offset)
|
{
|
{
|
cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset);
|
cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset);
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frchain_now->frch_cfi_data->cur_cfa_offset = offset;
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frchain_now->frch_cfi_data->cur_cfa_offset = offset;
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}
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}
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|
|
void
|
void
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cfi_add_CFA_restore (unsigned regno)
|
cfi_add_CFA_restore (unsigned regno)
|
{
|
{
|
cfi_add_CFA_insn_reg (DW_CFA_restore, regno);
|
cfi_add_CFA_insn_reg (DW_CFA_restore, regno);
|
}
|
}
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|
|
void
|
void
|
cfi_add_CFA_undefined (unsigned regno)
|
cfi_add_CFA_undefined (unsigned regno)
|
{
|
{
|
cfi_add_CFA_insn_reg (DW_CFA_undefined, regno);
|
cfi_add_CFA_insn_reg (DW_CFA_undefined, regno);
|
}
|
}
|
|
|
void
|
void
|
cfi_add_CFA_same_value (unsigned regno)
|
cfi_add_CFA_same_value (unsigned regno)
|
{
|
{
|
cfi_add_CFA_insn_reg (DW_CFA_same_value, regno);
|
cfi_add_CFA_insn_reg (DW_CFA_same_value, regno);
|
}
|
}
|
|
|
void
|
void
|
cfi_add_CFA_remember_state (void)
|
cfi_add_CFA_remember_state (void)
|
{
|
{
|
struct cfa_save_data *p;
|
struct cfa_save_data *p;
|
|
|
cfi_add_CFA_insn (DW_CFA_remember_state);
|
cfi_add_CFA_insn (DW_CFA_remember_state);
|
|
|
p = xmalloc (sizeof (*p));
|
p = xmalloc (sizeof (*p));
|
p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset;
|
p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset;
|
p->next = frchain_now->frch_cfi_data->cfa_save_stack;
|
p->next = frchain_now->frch_cfi_data->cfa_save_stack;
|
frchain_now->frch_cfi_data->cfa_save_stack = p;
|
frchain_now->frch_cfi_data->cfa_save_stack = p;
|
}
|
}
|
|
|
void
|
void
|
cfi_add_CFA_restore_state (void)
|
cfi_add_CFA_restore_state (void)
|
{
|
{
|
struct cfa_save_data *p;
|
struct cfa_save_data *p;
|
|
|
cfi_add_CFA_insn (DW_CFA_restore_state);
|
cfi_add_CFA_insn (DW_CFA_restore_state);
|
|
|
p = frchain_now->frch_cfi_data->cfa_save_stack;
|
p = frchain_now->frch_cfi_data->cfa_save_stack;
|
if (p)
|
if (p)
|
{
|
{
|
frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset;
|
frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset;
|
frchain_now->frch_cfi_data->cfa_save_stack = p->next;
|
frchain_now->frch_cfi_data->cfa_save_stack = p->next;
|
free (p);
|
free (p);
|
}
|
}
|
else
|
else
|
as_bad (_("CFI state restore without previous remember"));
|
as_bad (_("CFI state restore without previous remember"));
|
}
|
}
|
|
|
|
|
/* Parse CFI assembler directives. */
|
/* Parse CFI assembler directives. */
|
|
|
static void dot_cfi (int);
|
static void dot_cfi (int);
|
static void dot_cfi_escape (int);
|
static void dot_cfi_escape (int);
|
static void dot_cfi_startproc (int);
|
static void dot_cfi_startproc (int);
|
static void dot_cfi_endproc (int);
|
static void dot_cfi_endproc (int);
|
static void dot_cfi_personality (int);
|
static void dot_cfi_personality (int);
|
static void dot_cfi_lsda (int);
|
static void dot_cfi_lsda (int);
|
|
|
/* Fake CFI type; outside the byte range of any real CFI insn. */
|
/* Fake CFI type; outside the byte range of any real CFI insn. */
|
#define CFI_adjust_cfa_offset 0x100
|
#define CFI_adjust_cfa_offset 0x100
|
#define CFI_return_column 0x101
|
#define CFI_return_column 0x101
|
#define CFI_rel_offset 0x102
|
#define CFI_rel_offset 0x102
|
#define CFI_escape 0x103
|
#define CFI_escape 0x103
|
#define CFI_signal_frame 0x104
|
#define CFI_signal_frame 0x104
|
|
|
const pseudo_typeS cfi_pseudo_table[] =
|
const pseudo_typeS cfi_pseudo_table[] =
|
{
|
{
|
{ "cfi_startproc", dot_cfi_startproc, 0 },
|
{ "cfi_startproc", dot_cfi_startproc, 0 },
|
{ "cfi_endproc", dot_cfi_endproc, 0 },
|
{ "cfi_endproc", dot_cfi_endproc, 0 },
|
{ "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa },
|
{ "cfi_def_cfa", dot_cfi, DW_CFA_def_cfa },
|
{ "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register },
|
{ "cfi_def_cfa_register", dot_cfi, DW_CFA_def_cfa_register },
|
{ "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset },
|
{ "cfi_def_cfa_offset", dot_cfi, DW_CFA_def_cfa_offset },
|
{ "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset },
|
{ "cfi_adjust_cfa_offset", dot_cfi, CFI_adjust_cfa_offset },
|
{ "cfi_offset", dot_cfi, DW_CFA_offset },
|
{ "cfi_offset", dot_cfi, DW_CFA_offset },
|
{ "cfi_rel_offset", dot_cfi, CFI_rel_offset },
|
{ "cfi_rel_offset", dot_cfi, CFI_rel_offset },
|
{ "cfi_register", dot_cfi, DW_CFA_register },
|
{ "cfi_register", dot_cfi, DW_CFA_register },
|
{ "cfi_return_column", dot_cfi, CFI_return_column },
|
{ "cfi_return_column", dot_cfi, CFI_return_column },
|
{ "cfi_restore", dot_cfi, DW_CFA_restore },
|
{ "cfi_restore", dot_cfi, DW_CFA_restore },
|
{ "cfi_undefined", dot_cfi, DW_CFA_undefined },
|
{ "cfi_undefined", dot_cfi, DW_CFA_undefined },
|
{ "cfi_same_value", dot_cfi, DW_CFA_same_value },
|
{ "cfi_same_value", dot_cfi, DW_CFA_same_value },
|
{ "cfi_remember_state", dot_cfi, DW_CFA_remember_state },
|
{ "cfi_remember_state", dot_cfi, DW_CFA_remember_state },
|
{ "cfi_restore_state", dot_cfi, DW_CFA_restore_state },
|
{ "cfi_restore_state", dot_cfi, DW_CFA_restore_state },
|
{ "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
|
{ "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
|
{ "cfi_escape", dot_cfi_escape, 0 },
|
{ "cfi_escape", dot_cfi_escape, 0 },
|
{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
|
{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
|
{ "cfi_personality", dot_cfi_personality, 0 },
|
{ "cfi_personality", dot_cfi_personality, 0 },
|
{ "cfi_lsda", dot_cfi_lsda, 0 },
|
{ "cfi_lsda", dot_cfi_lsda, 0 },
|
{ NULL, NULL, 0 }
|
{ NULL, NULL, 0 }
|
};
|
};
|
|
|
static void
|
static void
|
cfi_parse_separator (void)
|
cfi_parse_separator (void)
|
{
|
{
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (*input_line_pointer == ',')
|
if (*input_line_pointer == ',')
|
input_line_pointer++;
|
input_line_pointer++;
|
else
|
else
|
as_bad (_("missing separator"));
|
as_bad (_("missing separator"));
|
}
|
}
|
|
|
#ifndef tc_parse_to_dw2regnum
|
#ifndef tc_parse_to_dw2regnum
|
static void
|
static void
|
tc_parse_to_dw2regnum(expressionS *exp)
|
tc_parse_to_dw2regnum(expressionS *exp)
|
{
|
{
|
# ifdef tc_regname_to_dw2regnum
|
# ifdef tc_regname_to_dw2regnum
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (is_name_beginner (*input_line_pointer)
|
if (is_name_beginner (*input_line_pointer)
|
|| (*input_line_pointer == '%'
|
|| (*input_line_pointer == '%'
|
&& is_name_beginner (*++input_line_pointer)))
|
&& is_name_beginner (*++input_line_pointer)))
|
{
|
{
|
char *name, c;
|
char *name, c;
|
|
|
name = input_line_pointer;
|
name = input_line_pointer;
|
c = get_symbol_end ();
|
c = get_symbol_end ();
|
|
|
exp->X_op = O_constant;
|
exp->X_op = O_constant;
|
exp->X_add_number = tc_regname_to_dw2regnum (name);
|
exp->X_add_number = tc_regname_to_dw2regnum (name);
|
|
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
}
|
}
|
else
|
else
|
# endif
|
# endif
|
expression_and_evaluate (exp);
|
expression_and_evaluate (exp);
|
}
|
}
|
#endif
|
#endif
|
|
|
static unsigned
|
static unsigned
|
cfi_parse_reg (void)
|
cfi_parse_reg (void)
|
{
|
{
|
int regno;
|
int regno;
|
expressionS exp;
|
expressionS exp;
|
|
|
tc_parse_to_dw2regnum (&exp);
|
tc_parse_to_dw2regnum (&exp);
|
switch (exp.X_op)
|
switch (exp.X_op)
|
{
|
{
|
case O_register:
|
case O_register:
|
case O_constant:
|
case O_constant:
|
regno = exp.X_add_number;
|
regno = exp.X_add_number;
|
break;
|
break;
|
|
|
default:
|
default:
|
regno = -1;
|
regno = -1;
|
break;
|
break;
|
}
|
}
|
|
|
if (regno < 0)
|
if (regno < 0)
|
{
|
{
|
as_bad (_("bad register expression"));
|
as_bad (_("bad register expression"));
|
regno = 0;
|
regno = 0;
|
}
|
}
|
|
|
return regno;
|
return regno;
|
}
|
}
|
|
|
static offsetT
|
static offsetT
|
cfi_parse_const (void)
|
cfi_parse_const (void)
|
{
|
{
|
return get_absolute_expression ();
|
return get_absolute_expression ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi (int arg)
|
dot_cfi (int arg)
|
{
|
{
|
offsetT offset;
|
offsetT offset;
|
unsigned reg1, reg2;
|
unsigned reg1, reg2;
|
|
|
if (frchain_now->frch_cfi_data == NULL)
|
if (frchain_now->frch_cfi_data == NULL)
|
{
|
{
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
/* If the last address was not at the current PC, advance to current. */
|
/* 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
|
if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
|
|| S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
|
|| S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
|
!= frag_now_fix ())
|
!= frag_now_fix ())
|
cfi_add_advance_loc (symbol_temp_new_now ());
|
cfi_add_advance_loc (symbol_temp_new_now ());
|
|
|
switch (arg)
|
switch (arg)
|
{
|
{
|
case DW_CFA_offset:
|
case DW_CFA_offset:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_parse_separator ();
|
cfi_parse_separator ();
|
offset = cfi_parse_const ();
|
offset = cfi_parse_const ();
|
cfi_add_CFA_offset (reg1, offset);
|
cfi_add_CFA_offset (reg1, offset);
|
break;
|
break;
|
|
|
case CFI_rel_offset:
|
case CFI_rel_offset:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_parse_separator ();
|
cfi_parse_separator ();
|
offset = cfi_parse_const ();
|
offset = cfi_parse_const ();
|
cfi_add_CFA_offset (reg1,
|
cfi_add_CFA_offset (reg1,
|
offset - frchain_now->frch_cfi_data->cur_cfa_offset);
|
offset - frchain_now->frch_cfi_data->cur_cfa_offset);
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa:
|
case DW_CFA_def_cfa:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_parse_separator ();
|
cfi_parse_separator ();
|
offset = cfi_parse_const ();
|
offset = cfi_parse_const ();
|
cfi_add_CFA_def_cfa (reg1, offset);
|
cfi_add_CFA_def_cfa (reg1, offset);
|
break;
|
break;
|
|
|
case DW_CFA_register:
|
case DW_CFA_register:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_parse_separator ();
|
cfi_parse_separator ();
|
reg2 = cfi_parse_reg ();
|
reg2 = cfi_parse_reg ();
|
cfi_add_CFA_register (reg1, reg2);
|
cfi_add_CFA_register (reg1, reg2);
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_register:
|
case DW_CFA_def_cfa_register:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_add_CFA_def_cfa_register (reg1);
|
cfi_add_CFA_def_cfa_register (reg1);
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_offset:
|
case DW_CFA_def_cfa_offset:
|
offset = cfi_parse_const ();
|
offset = cfi_parse_const ();
|
cfi_add_CFA_def_cfa_offset (offset);
|
cfi_add_CFA_def_cfa_offset (offset);
|
break;
|
break;
|
|
|
case CFI_adjust_cfa_offset:
|
case CFI_adjust_cfa_offset:
|
offset = cfi_parse_const ();
|
offset = cfi_parse_const ();
|
cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset
|
cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset
|
+ offset);
|
+ offset);
|
break;
|
break;
|
|
|
case DW_CFA_restore:
|
case DW_CFA_restore:
|
for (;;)
|
for (;;)
|
{
|
{
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_add_CFA_restore (reg1);
|
cfi_add_CFA_restore (reg1);
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (*input_line_pointer != ',')
|
if (*input_line_pointer != ',')
|
break;
|
break;
|
++input_line_pointer;
|
++input_line_pointer;
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_undefined:
|
case DW_CFA_undefined:
|
for (;;)
|
for (;;)
|
{
|
{
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_add_CFA_undefined (reg1);
|
cfi_add_CFA_undefined (reg1);
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (*input_line_pointer != ',')
|
if (*input_line_pointer != ',')
|
break;
|
break;
|
++input_line_pointer;
|
++input_line_pointer;
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_same_value:
|
case DW_CFA_same_value:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_add_CFA_same_value (reg1);
|
cfi_add_CFA_same_value (reg1);
|
break;
|
break;
|
|
|
case CFI_return_column:
|
case CFI_return_column:
|
reg1 = cfi_parse_reg ();
|
reg1 = cfi_parse_reg ();
|
cfi_set_return_column (reg1);
|
cfi_set_return_column (reg1);
|
break;
|
break;
|
|
|
case DW_CFA_remember_state:
|
case DW_CFA_remember_state:
|
cfi_add_CFA_remember_state ();
|
cfi_add_CFA_remember_state ();
|
break;
|
break;
|
|
|
case DW_CFA_restore_state:
|
case DW_CFA_restore_state:
|
cfi_add_CFA_restore_state ();
|
cfi_add_CFA_restore_state ();
|
break;
|
break;
|
|
|
case DW_CFA_GNU_window_save:
|
case DW_CFA_GNU_window_save:
|
cfi_add_CFA_insn (DW_CFA_GNU_window_save);
|
cfi_add_CFA_insn (DW_CFA_GNU_window_save);
|
break;
|
break;
|
|
|
case CFI_signal_frame:
|
case CFI_signal_frame:
|
frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1;
|
frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1;
|
break;
|
break;
|
|
|
default:
|
default:
|
abort ();
|
abort ();
|
}
|
}
|
|
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
|
dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
|
{
|
{
|
struct cfi_escape_data *head, **tail, *e;
|
struct cfi_escape_data *head, **tail, *e;
|
struct cfi_insn_data *insn;
|
struct cfi_insn_data *insn;
|
|
|
if (frchain_now->frch_cfi_data == NULL)
|
if (frchain_now->frch_cfi_data == NULL)
|
{
|
{
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
/* If the last address was not at the current PC, advance to current. */
|
/* 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
|
if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now
|
|| S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
|
|| S_GET_VALUE (frchain_now->frch_cfi_data->last_address)
|
!= frag_now_fix ())
|
!= frag_now_fix ())
|
cfi_add_advance_loc (symbol_temp_new_now ());
|
cfi_add_advance_loc (symbol_temp_new_now ());
|
|
|
tail = &head;
|
tail = &head;
|
do
|
do
|
{
|
{
|
e = xmalloc (sizeof (*e));
|
e = xmalloc (sizeof (*e));
|
do_parse_cons_expression (&e->exp, 1);
|
do_parse_cons_expression (&e->exp, 1);
|
*tail = e;
|
*tail = e;
|
tail = &e->next;
|
tail = &e->next;
|
}
|
}
|
while (*input_line_pointer++ == ',');
|
while (*input_line_pointer++ == ',');
|
*tail = NULL;
|
*tail = NULL;
|
|
|
insn = alloc_cfi_insn_data ();
|
insn = alloc_cfi_insn_data ();
|
insn->insn = CFI_escape;
|
insn->insn = CFI_escape;
|
insn->u.esc = head;
|
insn->u.esc = head;
|
|
|
--input_line_pointer;
|
--input_line_pointer;
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
|
dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
|
{
|
{
|
struct fde_entry *fde;
|
struct fde_entry *fde;
|
offsetT encoding;
|
offsetT encoding;
|
|
|
if (frchain_now->frch_cfi_data == NULL)
|
if (frchain_now->frch_cfi_data == NULL)
|
{
|
{
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
fde = frchain_now->frch_cfi_data->cur_fde_data;
|
fde = frchain_now->frch_cfi_data->cur_fde_data;
|
encoding = get_absolute_expression ();
|
encoding = get_absolute_expression ();
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
{
|
{
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
fde->per_encoding = encoding;
|
fde->per_encoding = encoding;
|
return;
|
return;
|
}
|
}
|
|
|
if ((encoding & 0xff) != encoding
|
if ((encoding & 0xff) != encoding
|
|| ((encoding & 0x70) != 0
|
|| ((encoding & 0x70) != 0
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
&& (encoding & 0x70) != DW_EH_PE_pcrel
|
&& (encoding & 0x70) != DW_EH_PE_pcrel
|
#endif
|
#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_uleb128
|
|| (encoding & 7) > DW_EH_PE_udata8)
|
|| (encoding & 7) > DW_EH_PE_udata8)
|
{
|
{
|
as_bad (_("invalid or unsupported encoding in .cfi_personality"));
|
as_bad (_("invalid or unsupported encoding in .cfi_personality"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
if (*input_line_pointer++ != ',')
|
if (*input_line_pointer++ != ',')
|
{
|
{
|
as_bad (_(".cfi_personality requires encoding and symbol arguments"));
|
as_bad (_(".cfi_personality requires encoding and symbol arguments"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
expression_and_evaluate (&fde->personality);
|
expression_and_evaluate (&fde->personality);
|
switch (fde->personality.X_op)
|
switch (fde->personality.X_op)
|
{
|
{
|
case O_symbol:
|
case O_symbol:
|
break;
|
break;
|
case O_constant:
|
case O_constant:
|
if ((encoding & 0x70) == DW_EH_PE_pcrel)
|
if ((encoding & 0x70) == DW_EH_PE_pcrel)
|
encoding = DW_EH_PE_omit;
|
encoding = DW_EH_PE_omit;
|
break;
|
break;
|
default:
|
default:
|
encoding = DW_EH_PE_omit;
|
encoding = DW_EH_PE_omit;
|
break;
|
break;
|
}
|
}
|
|
|
fde->per_encoding = encoding;
|
fde->per_encoding = encoding;
|
|
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
{
|
{
|
as_bad (_("wrong second argument to .cfi_personality"));
|
as_bad (_("wrong second argument to .cfi_personality"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
|
dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
|
{
|
{
|
struct fde_entry *fde;
|
struct fde_entry *fde;
|
offsetT encoding;
|
offsetT encoding;
|
|
|
if (frchain_now->frch_cfi_data == NULL)
|
if (frchain_now->frch_cfi_data == NULL)
|
{
|
{
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
as_bad (_("CFI instruction used without previous .cfi_startproc"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
fde = frchain_now->frch_cfi_data->cur_fde_data;
|
fde = frchain_now->frch_cfi_data->cur_fde_data;
|
encoding = get_absolute_expression ();
|
encoding = get_absolute_expression ();
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
{
|
{
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
fde->lsda_encoding = encoding;
|
fde->lsda_encoding = encoding;
|
return;
|
return;
|
}
|
}
|
|
|
if ((encoding & 0xff) != encoding
|
if ((encoding & 0xff) != encoding
|
|| ((encoding & 0x70) != 0
|
|| ((encoding & 0x70) != 0
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
&& (encoding & 0x70) != DW_EH_PE_pcrel
|
&& (encoding & 0x70) != DW_EH_PE_pcrel
|
#endif
|
#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_uleb128
|
|| (encoding & 7) > DW_EH_PE_udata8)
|
|| (encoding & 7) > DW_EH_PE_udata8)
|
{
|
{
|
as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
|
as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
if (*input_line_pointer++ != ',')
|
if (*input_line_pointer++ != ',')
|
{
|
{
|
as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
|
as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
fde->lsda_encoding = encoding;
|
fde->lsda_encoding = encoding;
|
|
|
expression_and_evaluate (&fde->lsda);
|
expression_and_evaluate (&fde->lsda);
|
switch (fde->lsda.X_op)
|
switch (fde->lsda.X_op)
|
{
|
{
|
case O_symbol:
|
case O_symbol:
|
break;
|
break;
|
case O_constant:
|
case O_constant:
|
if ((encoding & 0x70) == DW_EH_PE_pcrel)
|
if ((encoding & 0x70) == DW_EH_PE_pcrel)
|
encoding = DW_EH_PE_omit;
|
encoding = DW_EH_PE_omit;
|
break;
|
break;
|
default:
|
default:
|
encoding = DW_EH_PE_omit;
|
encoding = DW_EH_PE_omit;
|
break;
|
break;
|
}
|
}
|
|
|
fde->lsda_encoding = encoding;
|
fde->lsda_encoding = encoding;
|
|
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
{
|
{
|
as_bad (_("wrong second argument to .cfi_lsda"));
|
as_bad (_("wrong second argument to .cfi_lsda"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
|
dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
|
{
|
{
|
int simple = 0;
|
int simple = 0;
|
|
|
if (frchain_now->frch_cfi_data != NULL)
|
if (frchain_now->frch_cfi_data != NULL)
|
{
|
{
|
as_bad (_("previous CFI entry not closed (missing .cfi_endproc)"));
|
as_bad (_("previous CFI entry not closed (missing .cfi_endproc)"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
cfi_new_fde (symbol_temp_new_now ());
|
cfi_new_fde (symbol_temp_new_now ());
|
|
|
SKIP_WHITESPACE ();
|
SKIP_WHITESPACE ();
|
if (is_name_beginner (*input_line_pointer))
|
if (is_name_beginner (*input_line_pointer))
|
{
|
{
|
char *name, c;
|
char *name, c;
|
|
|
name = input_line_pointer;
|
name = input_line_pointer;
|
c = get_symbol_end ();
|
c = get_symbol_end ();
|
|
|
if (strcmp (name, "simple") == 0)
|
if (strcmp (name, "simple") == 0)
|
{
|
{
|
simple = 1;
|
simple = 1;
|
*input_line_pointer = c;
|
*input_line_pointer = c;
|
}
|
}
|
else
|
else
|
input_line_pointer = name;
|
input_line_pointer = name;
|
}
|
}
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
|
|
frchain_now->frch_cfi_data->cur_cfa_offset = 0;
|
frchain_now->frch_cfi_data->cur_cfa_offset = 0;
|
if (!simple)
|
if (!simple)
|
tc_cfi_frame_initial_instructions ();
|
tc_cfi_frame_initial_instructions ();
|
}
|
}
|
|
|
static void
|
static void
|
dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
|
dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED)
|
{
|
{
|
if (frchain_now->frch_cfi_data == NULL)
|
if (frchain_now->frch_cfi_data == NULL)
|
{
|
{
|
as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
|
as_bad (_(".cfi_endproc without corresponding .cfi_startproc"));
|
ignore_rest_of_line ();
|
ignore_rest_of_line ();
|
return;
|
return;
|
}
|
}
|
|
|
cfi_end_fde (symbol_temp_new_now ());
|
cfi_end_fde (symbol_temp_new_now ());
|
|
|
demand_empty_rest_of_line ();
|
demand_empty_rest_of_line ();
|
}
|
}
|
|
|
|
|
/* Emit a single byte into the current segment. */
|
/* Emit a single byte into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_one (int byte)
|
out_one (int byte)
|
{
|
{
|
FRAG_APPEND_1_CHAR (byte);
|
FRAG_APPEND_1_CHAR (byte);
|
}
|
}
|
|
|
/* Emit a two-byte word into the current segment. */
|
/* Emit a two-byte word into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_two (int data)
|
out_two (int data)
|
{
|
{
|
md_number_to_chars (frag_more (2), data, 2);
|
md_number_to_chars (frag_more (2), data, 2);
|
}
|
}
|
|
|
/* Emit a four byte word into the current segment. */
|
/* Emit a four byte word into the current segment. */
|
|
|
static inline void
|
static inline void
|
out_four (int data)
|
out_four (int data)
|
{
|
{
|
md_number_to_chars (frag_more (4), data, 4);
|
md_number_to_chars (frag_more (4), data, 4);
|
}
|
}
|
|
|
/* Emit an unsigned "little-endian base 128" number. */
|
/* Emit an unsigned "little-endian base 128" number. */
|
|
|
static void
|
static void
|
out_uleb128 (addressT value)
|
out_uleb128 (addressT value)
|
{
|
{
|
output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
|
output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
|
}
|
}
|
|
|
/* Emit an unsigned "little-endian base 128" number. */
|
/* Emit an unsigned "little-endian base 128" number. */
|
|
|
static void
|
static void
|
out_sleb128 (offsetT value)
|
out_sleb128 (offsetT value)
|
{
|
{
|
output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
|
output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
|
}
|
}
|
|
|
static void
|
static void
|
output_cfi_insn (struct cfi_insn_data *insn)
|
output_cfi_insn (struct cfi_insn_data *insn)
|
{
|
{
|
offsetT offset;
|
offsetT offset;
|
unsigned int regno;
|
unsigned int regno;
|
|
|
switch (insn->insn)
|
switch (insn->insn)
|
{
|
{
|
case DW_CFA_advance_loc:
|
case DW_CFA_advance_loc:
|
{
|
{
|
symbolS *from = insn->u.ll.lab1;
|
symbolS *from = insn->u.ll.lab1;
|
symbolS *to = insn->u.ll.lab2;
|
symbolS *to = insn->u.ll.lab2;
|
|
|
if (symbol_get_frag (to) == symbol_get_frag (from))
|
if (symbol_get_frag (to) == symbol_get_frag (from))
|
{
|
{
|
addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from);
|
addressT delta = S_GET_VALUE (to) - S_GET_VALUE (from);
|
addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH;
|
addressT scaled = delta / DWARF2_LINE_MIN_INSN_LENGTH;
|
|
|
if (scaled <= 0x3F)
|
if (scaled <= 0x3F)
|
out_one (DW_CFA_advance_loc + scaled);
|
out_one (DW_CFA_advance_loc + scaled);
|
else if (delta <= 0xFF)
|
else if (delta <= 0xFF)
|
{
|
{
|
out_one (DW_CFA_advance_loc1);
|
out_one (DW_CFA_advance_loc1);
|
out_one (delta);
|
out_one (delta);
|
}
|
}
|
else if (delta <= 0xFFFF)
|
else if (delta <= 0xFFFF)
|
{
|
{
|
out_one (DW_CFA_advance_loc2);
|
out_one (DW_CFA_advance_loc2);
|
out_two (delta);
|
out_two (delta);
|
}
|
}
|
else
|
else
|
{
|
{
|
out_one (DW_CFA_advance_loc4);
|
out_one (DW_CFA_advance_loc4);
|
out_four (delta);
|
out_four (delta);
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
expressionS exp;
|
expressionS exp;
|
|
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_add_symbol = to;
|
exp.X_add_symbol = to;
|
exp.X_op_symbol = from;
|
exp.X_op_symbol = from;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
|
|
/* The code in ehopt.c expects that one byte of the encoding
|
/* The code in ehopt.c expects that one byte of the encoding
|
is already allocated to the frag. This comes from the way
|
is already allocated to the frag. This comes from the way
|
that it scans the .eh_frame section looking first for the
|
that it scans the .eh_frame section looking first for the
|
.byte DW_CFA_advance_loc4. */
|
.byte DW_CFA_advance_loc4. */
|
frag_more (1);
|
frag_more (1);
|
|
|
frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3,
|
frag_var (rs_cfa, 4, 0, DWARF2_LINE_MIN_INSN_LENGTH << 3,
|
make_expr_symbol (&exp), frag_now_fix () - 1,
|
make_expr_symbol (&exp), frag_now_fix () - 1,
|
(char *) frag_now);
|
(char *) frag_now);
|
}
|
}
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa:
|
case DW_CFA_def_cfa:
|
offset = insn->u.ri.offset;
|
offset = insn->u.ri.offset;
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
out_one (DW_CFA_def_cfa_sf);
|
out_one (DW_CFA_def_cfa_sf);
|
out_uleb128 (insn->u.ri.reg);
|
out_uleb128 (insn->u.ri.reg);
|
out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
|
out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
|
}
|
}
|
else
|
else
|
{
|
{
|
out_one (DW_CFA_def_cfa);
|
out_one (DW_CFA_def_cfa);
|
out_uleb128 (insn->u.ri.reg);
|
out_uleb128 (insn->u.ri.reg);
|
out_uleb128 (offset);
|
out_uleb128 (offset);
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_register:
|
case DW_CFA_def_cfa_register:
|
case DW_CFA_undefined:
|
case DW_CFA_undefined:
|
case DW_CFA_same_value:
|
case DW_CFA_same_value:
|
out_one (insn->insn);
|
out_one (insn->insn);
|
out_uleb128 (insn->u.r);
|
out_uleb128 (insn->u.r);
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_offset:
|
case DW_CFA_def_cfa_offset:
|
offset = insn->u.i;
|
offset = insn->u.i;
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
out_one (DW_CFA_def_cfa_offset_sf);
|
out_one (DW_CFA_def_cfa_offset_sf);
|
out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
|
out_sleb128 (offset / DWARF2_CIE_DATA_ALIGNMENT);
|
}
|
}
|
else
|
else
|
{
|
{
|
out_one (DW_CFA_def_cfa_offset);
|
out_one (DW_CFA_def_cfa_offset);
|
out_uleb128 (offset);
|
out_uleb128 (offset);
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_restore:
|
case DW_CFA_restore:
|
regno = insn->u.r;
|
regno = insn->u.r;
|
if (regno <= 0x3F)
|
if (regno <= 0x3F)
|
{
|
{
|
out_one (DW_CFA_restore + regno);
|
out_one (DW_CFA_restore + regno);
|
}
|
}
|
else
|
else
|
{
|
{
|
out_one (DW_CFA_restore_extended);
|
out_one (DW_CFA_restore_extended);
|
out_uleb128 (regno);
|
out_uleb128 (regno);
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_offset:
|
case DW_CFA_offset:
|
regno = insn->u.ri.reg;
|
regno = insn->u.ri.reg;
|
offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT;
|
offset = insn->u.ri.offset / DWARF2_CIE_DATA_ALIGNMENT;
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
out_one (DW_CFA_offset_extended_sf);
|
out_one (DW_CFA_offset_extended_sf);
|
out_uleb128 (regno);
|
out_uleb128 (regno);
|
out_sleb128 (offset);
|
out_sleb128 (offset);
|
}
|
}
|
else if (regno <= 0x3F)
|
else if (regno <= 0x3F)
|
{
|
{
|
out_one (DW_CFA_offset + regno);
|
out_one (DW_CFA_offset + regno);
|
out_uleb128 (offset);
|
out_uleb128 (offset);
|
}
|
}
|
else
|
else
|
{
|
{
|
out_one (DW_CFA_offset_extended);
|
out_one (DW_CFA_offset_extended);
|
out_uleb128 (regno);
|
out_uleb128 (regno);
|
out_uleb128 (offset);
|
out_uleb128 (offset);
|
}
|
}
|
break;
|
break;
|
|
|
case DW_CFA_register:
|
case DW_CFA_register:
|
out_one (DW_CFA_register);
|
out_one (DW_CFA_register);
|
out_uleb128 (insn->u.rr.reg1);
|
out_uleb128 (insn->u.rr.reg1);
|
out_uleb128 (insn->u.rr.reg2);
|
out_uleb128 (insn->u.rr.reg2);
|
break;
|
break;
|
|
|
case DW_CFA_remember_state:
|
case DW_CFA_remember_state:
|
case DW_CFA_restore_state:
|
case DW_CFA_restore_state:
|
out_one (insn->insn);
|
out_one (insn->insn);
|
break;
|
break;
|
|
|
case DW_CFA_GNU_window_save:
|
case DW_CFA_GNU_window_save:
|
out_one (DW_CFA_GNU_window_save);
|
out_one (DW_CFA_GNU_window_save);
|
break;
|
break;
|
|
|
case CFI_escape:
|
case CFI_escape:
|
{
|
{
|
struct cfi_escape_data *e;
|
struct cfi_escape_data *e;
|
for (e = insn->u.esc; e ; e = e->next)
|
for (e = insn->u.esc; e ; e = e->next)
|
emit_expr (&e->exp, 1);
|
emit_expr (&e->exp, 1);
|
break;
|
break;
|
}
|
}
|
|
|
default:
|
default:
|
abort ();
|
abort ();
|
}
|
}
|
}
|
}
|
|
|
static offsetT
|
static offsetT
|
encoding_size (unsigned char encoding)
|
encoding_size (unsigned char encoding)
|
{
|
{
|
if (encoding == DW_EH_PE_omit)
|
if (encoding == DW_EH_PE_omit)
|
return 0;
|
return 0;
|
switch (encoding & 0x7)
|
switch (encoding & 0x7)
|
{
|
{
|
case 0:
|
case 0:
|
return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
|
return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
|
case DW_EH_PE_udata2:
|
case DW_EH_PE_udata2:
|
return 2;
|
return 2;
|
case DW_EH_PE_udata4:
|
case DW_EH_PE_udata4:
|
return 4;
|
return 4;
|
case DW_EH_PE_udata8:
|
case DW_EH_PE_udata8:
|
return 8;
|
return 8;
|
default:
|
default:
|
abort ();
|
abort ();
|
}
|
}
|
}
|
}
|
|
|
static void
|
static void
|
output_cie (struct cie_entry *cie)
|
output_cie (struct cie_entry *cie)
|
{
|
{
|
symbolS *after_size_address, *end_address;
|
symbolS *after_size_address, *end_address;
|
expressionS exp;
|
expressionS exp;
|
struct cfi_insn_data *i;
|
struct cfi_insn_data *i;
|
offsetT augmentation_size;
|
offsetT augmentation_size;
|
|
|
cie->start_address = symbol_temp_new_now ();
|
cie->start_address = symbol_temp_new_now ();
|
after_size_address = symbol_temp_make ();
|
after_size_address = symbol_temp_make ();
|
end_address = symbol_temp_make ();
|
end_address = symbol_temp_make ();
|
|
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_add_symbol = end_address;
|
exp.X_add_symbol = end_address;
|
exp.X_op_symbol = after_size_address;
|
exp.X_op_symbol = after_size_address;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
|
|
emit_expr (&exp, 4); /* Length. */
|
emit_expr (&exp, 4); /* Length. */
|
symbol_set_value_now (after_size_address);
|
symbol_set_value_now (after_size_address);
|
out_four (0); /* CIE id. */
|
out_four (0); /* CIE id. */
|
out_one (DW_CIE_VERSION); /* Version. */
|
out_one (DW_CIE_VERSION); /* Version. */
|
out_one ('z'); /* Augmentation. */
|
out_one ('z'); /* Augmentation. */
|
if (cie->per_encoding != DW_EH_PE_omit)
|
if (cie->per_encoding != DW_EH_PE_omit)
|
out_one ('P');
|
out_one ('P');
|
if (cie->lsda_encoding != DW_EH_PE_omit)
|
if (cie->lsda_encoding != DW_EH_PE_omit)
|
out_one ('L');
|
out_one ('L');
|
out_one ('R');
|
out_one ('R');
|
if (cie->signal_frame)
|
if (cie->signal_frame)
|
out_one ('S');
|
out_one ('S');
|
out_one (0);
|
out_one (0);
|
out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */
|
out_uleb128 (DWARF2_LINE_MIN_INSN_LENGTH); /* Code alignment. */
|
out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */
|
out_sleb128 (DWARF2_CIE_DATA_ALIGNMENT); /* Data alignment. */
|
if (DW_CIE_VERSION == 1) /* Return column. */
|
if (DW_CIE_VERSION == 1) /* Return column. */
|
out_one (cie->return_column);
|
out_one (cie->return_column);
|
else
|
else
|
out_uleb128 (cie->return_column);
|
out_uleb128 (cie->return_column);
|
augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
|
augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
|
if (cie->per_encoding != DW_EH_PE_omit)
|
if (cie->per_encoding != DW_EH_PE_omit)
|
augmentation_size += 1 + encoding_size (cie->per_encoding);
|
augmentation_size += 1 + encoding_size (cie->per_encoding);
|
out_uleb128 (augmentation_size); /* Augmentation size. */
|
out_uleb128 (augmentation_size); /* Augmentation size. */
|
if (cie->per_encoding != DW_EH_PE_omit)
|
if (cie->per_encoding != DW_EH_PE_omit)
|
{
|
{
|
offsetT size = encoding_size (cie->per_encoding);
|
offsetT size = encoding_size (cie->per_encoding);
|
out_one (cie->per_encoding);
|
out_one (cie->per_encoding);
|
exp = cie->personality;
|
exp = cie->personality;
|
if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
|
if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
|
{
|
{
|
#ifdef DIFF_EXPR_OK
|
#ifdef DIFF_EXPR_OK
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_op_symbol = symbol_temp_new_now ();
|
exp.X_op_symbol = symbol_temp_new_now ();
|
emit_expr (&exp, size);
|
emit_expr (&exp, size);
|
#elif defined (tc_cfi_emit_pcrel_expr)
|
#elif defined (tc_cfi_emit_pcrel_expr)
|
tc_cfi_emit_pcrel_expr (&exp, size);
|
tc_cfi_emit_pcrel_expr (&exp, size);
|
#else
|
#else
|
abort ();
|
abort ();
|
#endif
|
#endif
|
}
|
}
|
else
|
else
|
emit_expr (&exp, size);
|
emit_expr (&exp, size);
|
}
|
}
|
if (cie->lsda_encoding != DW_EH_PE_omit)
|
if (cie->lsda_encoding != DW_EH_PE_omit)
|
out_one (cie->lsda_encoding);
|
out_one (cie->lsda_encoding);
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
|
out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4);
|
#else
|
#else
|
out_one (DW_EH_PE_sdata4);
|
out_one (DW_EH_PE_sdata4);
|
#endif
|
#endif
|
|
|
if (cie->first)
|
if (cie->first)
|
for (i = cie->first; i != cie->last; i = i->next)
|
for (i = cie->first; i != cie->last; i = i->next)
|
output_cfi_insn (i);
|
output_cfi_insn (i);
|
|
|
frag_align (2, DW_CFA_nop, 0);
|
frag_align (2, DW_CFA_nop, 0);
|
symbol_set_value_now (end_address);
|
symbol_set_value_now (end_address);
|
}
|
}
|
|
|
static void
|
static void
|
output_fde (struct fde_entry *fde, struct cie_entry *cie,
|
output_fde (struct fde_entry *fde, struct cie_entry *cie,
|
struct cfi_insn_data *first, int align)
|
struct cfi_insn_data *first, int align)
|
{
|
{
|
symbolS *after_size_address, *end_address;
|
symbolS *after_size_address, *end_address;
|
expressionS exp;
|
expressionS exp;
|
offsetT augmentation_size;
|
offsetT augmentation_size;
|
|
|
after_size_address = symbol_temp_make ();
|
after_size_address = symbol_temp_make ();
|
end_address = symbol_temp_make ();
|
end_address = symbol_temp_make ();
|
|
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_add_symbol = end_address;
|
exp.X_add_symbol = end_address;
|
exp.X_op_symbol = after_size_address;
|
exp.X_op_symbol = after_size_address;
|
exp.X_add_number = 0;
|
exp.X_add_number = 0;
|
emit_expr (&exp, 4); /* Length. */
|
emit_expr (&exp, 4); /* Length. */
|
symbol_set_value_now (after_size_address);
|
symbol_set_value_now (after_size_address);
|
|
|
exp.X_add_symbol = after_size_address;
|
exp.X_add_symbol = after_size_address;
|
exp.X_op_symbol = cie->start_address;
|
exp.X_op_symbol = cie->start_address;
|
emit_expr (&exp, 4); /* CIE offset. */
|
emit_expr (&exp, 4); /* CIE offset. */
|
|
|
#ifdef DIFF_EXPR_OK
|
#ifdef DIFF_EXPR_OK
|
exp.X_add_symbol = fde->start_address;
|
exp.X_add_symbol = fde->start_address;
|
exp.X_op_symbol = symbol_temp_new_now ();
|
exp.X_op_symbol = symbol_temp_new_now ();
|
emit_expr (&exp, 4); /* Code offset. */
|
emit_expr (&exp, 4); /* Code offset. */
|
#else
|
#else
|
exp.X_op = O_symbol;
|
exp.X_op = O_symbol;
|
exp.X_add_symbol = fde->start_address;
|
exp.X_add_symbol = fde->start_address;
|
exp.X_op_symbol = NULL;
|
exp.X_op_symbol = NULL;
|
#ifdef tc_cfi_emit_pcrel_expr
|
#ifdef tc_cfi_emit_pcrel_expr
|
tc_cfi_emit_pcrel_expr (&exp, 4); /* Code offset. */
|
tc_cfi_emit_pcrel_expr (&exp, 4); /* Code offset. */
|
#else
|
#else
|
emit_expr (&exp, 4); /* Code offset. */
|
emit_expr (&exp, 4); /* Code offset. */
|
#endif
|
#endif
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
#endif
|
#endif
|
|
|
exp.X_add_symbol = fde->end_address;
|
exp.X_add_symbol = fde->end_address;
|
exp.X_op_symbol = fde->start_address; /* Code length. */
|
exp.X_op_symbol = fde->start_address; /* Code length. */
|
emit_expr (&exp, 4);
|
emit_expr (&exp, 4);
|
|
|
augmentation_size = encoding_size (fde->lsda_encoding);
|
augmentation_size = encoding_size (fde->lsda_encoding);
|
out_uleb128 (augmentation_size); /* Augmentation size. */
|
out_uleb128 (augmentation_size); /* Augmentation size. */
|
|
|
if (fde->lsda_encoding != DW_EH_PE_omit)
|
if (fde->lsda_encoding != DW_EH_PE_omit)
|
{
|
{
|
exp = fde->lsda;
|
exp = fde->lsda;
|
if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
|
if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
|
{
|
{
|
#ifdef DIFF_EXPR_OK
|
#ifdef DIFF_EXPR_OK
|
exp.X_op = O_subtract;
|
exp.X_op = O_subtract;
|
exp.X_op_symbol = symbol_temp_new_now ();
|
exp.X_op_symbol = symbol_temp_new_now ();
|
emit_expr (&exp, augmentation_size);
|
emit_expr (&exp, augmentation_size);
|
#elif defined (tc_cfi_emit_pcrel_expr)
|
#elif defined (tc_cfi_emit_pcrel_expr)
|
tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
|
tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
|
#else
|
#else
|
abort ();
|
abort ();
|
#endif
|
#endif
|
}
|
}
|
else
|
else
|
emit_expr (&exp, augmentation_size);
|
emit_expr (&exp, augmentation_size);
|
}
|
}
|
|
|
for (; first; first = first->next)
|
for (; first; first = first->next)
|
output_cfi_insn (first);
|
output_cfi_insn (first);
|
|
|
frag_align (align, DW_CFA_nop, 0);
|
frag_align (align, DW_CFA_nop, 0);
|
symbol_set_value_now (end_address);
|
symbol_set_value_now (end_address);
|
}
|
}
|
|
|
static struct cie_entry *
|
static struct cie_entry *
|
select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
|
select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
|
{
|
{
|
struct cfi_insn_data *i, *j;
|
struct cfi_insn_data *i, *j;
|
struct cie_entry *cie;
|
struct cie_entry *cie;
|
|
|
for (cie = cie_root; cie; cie = cie->next)
|
for (cie = cie_root; cie; cie = cie->next)
|
{
|
{
|
if (cie->return_column != fde->return_column
|
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->per_encoding != fde->per_encoding
|
|| cie->lsda_encoding != fde->lsda_encoding)
|
|| cie->lsda_encoding != fde->lsda_encoding)
|
continue;
|
continue;
|
if (cie->per_encoding != DW_EH_PE_omit)
|
if (cie->per_encoding != DW_EH_PE_omit)
|
{
|
{
|
if (cie->personality.X_op != fde->personality.X_op
|
if (cie->personality.X_op != fde->personality.X_op
|
|| cie->personality.X_add_number
|
|| cie->personality.X_add_number
|
!= fde->personality.X_add_number)
|
!= fde->personality.X_add_number)
|
continue;
|
continue;
|
switch (cie->personality.X_op)
|
switch (cie->personality.X_op)
|
{
|
{
|
case O_constant:
|
case O_constant:
|
if (cie->personality.X_unsigned != fde->personality.X_unsigned)
|
if (cie->personality.X_unsigned != fde->personality.X_unsigned)
|
continue;
|
continue;
|
break;
|
break;
|
case O_symbol:
|
case O_symbol:
|
if (cie->personality.X_add_symbol
|
if (cie->personality.X_add_symbol
|
!= fde->personality.X_add_symbol)
|
!= fde->personality.X_add_symbol)
|
continue;
|
continue;
|
break;
|
break;
|
default:
|
default:
|
abort ();
|
abort ();
|
}
|
}
|
}
|
}
|
for (i = cie->first, j = fde->data;
|
for (i = cie->first, j = fde->data;
|
i != cie->last && j != NULL;
|
i != cie->last && j != NULL;
|
i = i->next, j = j->next)
|
i = i->next, j = j->next)
|
{
|
{
|
if (i->insn != j->insn)
|
if (i->insn != j->insn)
|
goto fail;
|
goto fail;
|
switch (i->insn)
|
switch (i->insn)
|
{
|
{
|
case DW_CFA_advance_loc:
|
case DW_CFA_advance_loc:
|
case DW_CFA_remember_state:
|
case DW_CFA_remember_state:
|
/* We reached the first advance/remember in the FDE,
|
/* We reached the first advance/remember in the FDE,
|
but did not reach the end of the CIE list. */
|
but did not reach the end of the CIE list. */
|
goto fail;
|
goto fail;
|
|
|
case DW_CFA_offset:
|
case DW_CFA_offset:
|
case DW_CFA_def_cfa:
|
case DW_CFA_def_cfa:
|
if (i->u.ri.reg != j->u.ri.reg)
|
if (i->u.ri.reg != j->u.ri.reg)
|
goto fail;
|
goto fail;
|
if (i->u.ri.offset != j->u.ri.offset)
|
if (i->u.ri.offset != j->u.ri.offset)
|
goto fail;
|
goto fail;
|
break;
|
break;
|
|
|
case DW_CFA_register:
|
case DW_CFA_register:
|
if (i->u.rr.reg1 != j->u.rr.reg1)
|
if (i->u.rr.reg1 != j->u.rr.reg1)
|
goto fail;
|
goto fail;
|
if (i->u.rr.reg2 != j->u.rr.reg2)
|
if (i->u.rr.reg2 != j->u.rr.reg2)
|
goto fail;
|
goto fail;
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_register:
|
case DW_CFA_def_cfa_register:
|
case DW_CFA_restore:
|
case DW_CFA_restore:
|
case DW_CFA_undefined:
|
case DW_CFA_undefined:
|
case DW_CFA_same_value:
|
case DW_CFA_same_value:
|
if (i->u.r != j->u.r)
|
if (i->u.r != j->u.r)
|
goto fail;
|
goto fail;
|
break;
|
break;
|
|
|
case DW_CFA_def_cfa_offset:
|
case DW_CFA_def_cfa_offset:
|
if (i->u.i != j->u.i)
|
if (i->u.i != j->u.i)
|
goto fail;
|
goto fail;
|
break;
|
break;
|
|
|
case CFI_escape:
|
case CFI_escape:
|
/* Don't bother matching these for now. */
|
/* Don't bother matching these for now. */
|
goto fail;
|
goto fail;
|
|
|
default:
|
default:
|
abort ();
|
abort ();
|
}
|
}
|
}
|
}
|
|
|
/* Success if we reached the end of the CIE list, and we've either
|
/* Success if we reached the end of the CIE list, and we've either
|
run out of FDE entries or we've encountered an advance,
|
run out of FDE entries or we've encountered an advance,
|
remember, or escape. */
|
remember, or escape. */
|
if (i == cie->last
|
if (i == cie->last
|
&& (!j
|
&& (!j
|
|| j->insn == DW_CFA_advance_loc
|
|| j->insn == DW_CFA_advance_loc
|
|| j->insn == DW_CFA_remember_state
|
|| j->insn == DW_CFA_remember_state
|
|| j->insn == CFI_escape))
|
|| j->insn == CFI_escape))
|
{
|
{
|
*pfirst = j;
|
*pfirst = j;
|
return cie;
|
return cie;
|
}
|
}
|
|
|
fail:;
|
fail:;
|
}
|
}
|
|
|
cie = xmalloc (sizeof (struct cie_entry));
|
cie = xmalloc (sizeof (struct cie_entry));
|
cie->next = cie_root;
|
cie->next = cie_root;
|
cie_root = cie;
|
cie_root = cie;
|
cie->return_column = fde->return_column;
|
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->per_encoding = fde->per_encoding;
|
cie->lsda_encoding = fde->lsda_encoding;
|
cie->lsda_encoding = fde->lsda_encoding;
|
cie->personality = fde->personality;
|
cie->personality = fde->personality;
|
cie->first = fde->data;
|
cie->first = fde->data;
|
|
|
for (i = cie->first; i ; i = i->next)
|
for (i = cie->first; i ; i = i->next)
|
if (i->insn == DW_CFA_advance_loc
|
if (i->insn == DW_CFA_advance_loc
|
|| i->insn == DW_CFA_remember_state
|
|| i->insn == DW_CFA_remember_state
|
|| i->insn == CFI_escape)
|
|| i->insn == CFI_escape)
|
break;
|
break;
|
|
|
cie->last = i;
|
cie->last = i;
|
*pfirst = i;
|
*pfirst = i;
|
|
|
output_cie (cie);
|
output_cie (cie);
|
|
|
return cie;
|
return cie;
|
}
|
}
|
|
|
void
|
void
|
cfi_finish (void)
|
cfi_finish (void)
|
{
|
{
|
segT cfi_seg;
|
segT cfi_seg;
|
struct fde_entry *fde;
|
struct fde_entry *fde;
|
int save_flag_traditional_format;
|
int save_flag_traditional_format;
|
|
|
if (all_fde_data == 0)
|
if (all_fde_data == 0)
|
return;
|
return;
|
|
|
/* Open .eh_frame section. */
|
/* Open .eh_frame section. */
|
cfi_seg = subseg_new (".eh_frame", 0);
|
cfi_seg = subseg_new (".eh_frame", 0);
|
bfd_set_section_flags (stdoutput, cfi_seg,
|
bfd_set_section_flags (stdoutput, cfi_seg,
|
SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY);
|
SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY);
|
subseg_set (cfi_seg, 0);
|
subseg_set (cfi_seg, 0);
|
record_alignment (cfi_seg, EH_FRAME_ALIGNMENT);
|
record_alignment (cfi_seg, EH_FRAME_ALIGNMENT);
|
|
|
/* Make sure check_eh_frame doesn't do anything with our output. */
|
/* Make sure check_eh_frame doesn't do anything with our output. */
|
save_flag_traditional_format = flag_traditional_format;
|
save_flag_traditional_format = flag_traditional_format;
|
flag_traditional_format = 1;
|
flag_traditional_format = 1;
|
|
|
for (fde = all_fde_data; fde ; fde = fde->next)
|
for (fde = all_fde_data; fde ; fde = fde->next)
|
{
|
{
|
struct cfi_insn_data *first;
|
struct cfi_insn_data *first;
|
struct cie_entry *cie;
|
struct cie_entry *cie;
|
|
|
if (fde->end_address == NULL)
|
if (fde->end_address == NULL)
|
{
|
{
|
as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
|
as_bad (_("open CFI at the end of file; missing .cfi_endproc directive"));
|
fde->end_address = fde->start_address;
|
fde->end_address = fde->start_address;
|
}
|
}
|
|
|
cie = select_cie_for_fde (fde, &first);
|
cie = select_cie_for_fde (fde, &first);
|
output_fde (fde, cie, first, fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
|
output_fde (fde, cie, first, fde->next == NULL ? EH_FRAME_ALIGNMENT : 2);
|
}
|
}
|
|
|
flag_traditional_format = save_flag_traditional_format;
|
flag_traditional_format = save_flag_traditional_format;
|
}
|
}
|
|
|
#else /* TARGET_USE_CFIPOP */
|
#else /* TARGET_USE_CFIPOP */
|
void
|
void
|
cfi_finish (void)
|
cfi_finish (void)
|
{
|
{
|
}
|
}
|
#endif /* TARGET_USE_CFIPOP */
|
#endif /* TARGET_USE_CFIPOP */
|
|
|
