f8a57be818
2004-06-28 Geoffrey Keating <geoffk@apple.com> Andreas Tobler <a.tobler@schweiz.ch> PR 15813 * dwarf2out.c (reg_save): Output DW_CFA_same_value when a register is saved in itself. (initial_return_save): If the return address is a register, it's already there, don't bother to mention it in the CFI. (struct queued_reg_save): Add field saved_reg. (struct reg_saved_in_data): New. (regs_saved_in_regs): New. (num_regs_saved_in_regs): New. (queue_reg_save): Add extra parameter to specify register saved in register. Remove duplicate entries from queue. Add comment for function. (flush_queued_reg_saves): Handle registers saved in registers. Update regs_saved_in_regs. Add comment for function. (clobbers_queued_reg_save): Add comment for function. Allow for regs_saved_in_regs. (reg_saved_in): New. (dwarf2out_frame_debug_expr): Handle saving registers in other registers. (dwarf2out_frame_debug): Reset regs_saved_in_regs. * unwind-dw2.c (execute_cfa_program): Correct handling of DW_CFA_same_value. Add FIXME comment about incorrect implementation of DW_CFA_restore_extended. * config/rs6000/rs6000.c (rs6000_emit_prologue): Let dwarf2out_frame_debug_expr see instructions that save registers in other registers or save those other registers in memory. * unwind-dw2.c (DWARF_FRAME_REGISTERS): Move to unwind-dw2.h. (_Unwind_FrameState): Likewise. * unwind-dw2.h: New. * Makefile.in (LIB2ADDEHDEP): Add unwind-dw2.h. * config/rs6000/darwin-fallback.c: New file. * config/rs6000/darwin.h (MD_FALLBACK_FRAME_STATE_FOR): Define. * config/rs6000/t-darwin (LIB2FUNCS_EXTRA): Add darwin-fallback.o. Index: gcc/testsuite/ChangeLog 2004-06-26 Geoffrey Keating <geoffk@apple.com> Andreas Tobler <a.tobler@schweiz.ch> * gcc.dg/cleanup-10.c: Run on all Linux platforms and powerpc-darwin. Use SA_RESETHAND rather than SA_ONESHOT. Trap SIGBUS as well as SIGSEGV. * gcc.dg/cleanup-11.c: Likewise. * gcc.dg/cleanup-8.c: Likewise. * gcc.dg/cleanup-9.c: Likewise. * gcc.dg/cleanup-5.c: Run on all platforms. Index: libjava/ChangeLog 2004-06-26 Geoffrey Keating <geoffk@apple.com> Andreas Tobler <a.tobler@schweiz.ch> * configure.host (powerpc-*-darwin*): New case, define can_unwind_signal. * configure.in (*-*-darwin*): New case, point to darwin-signal.h. * configure: Regenerate. * include/darwin-signal.h: New. Co-Authored-By: Andreas Tobler <a.tobler@schweiz.ch> From-SVN: r83953
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/* DWARF2 frame unwind data structure.
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combined
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executable.)
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* A target can override (perhaps for backward compatibility) how
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many dwarf2 columns are unwound. */
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#ifndef DWARF_FRAME_REGISTERS
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#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
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#endif
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/* The result of interpreting the frame unwind info for a frame.
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This is all symbolic at this point, as none of the values can
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be resolved until the target pc is located. */
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typedef struct
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{
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/* Each register save state can be described in terms of a CFA slot,
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another register, or a location expression. */
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struct frame_state_reg_info
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{
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struct {
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union {
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_Unwind_Word reg;
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_Unwind_Sword offset;
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const unsigned char *exp;
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} loc;
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enum {
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REG_UNSAVED,
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REG_SAVED_OFFSET,
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REG_SAVED_REG,
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REG_SAVED_EXP
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} how;
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} reg[DWARF_FRAME_REGISTERS+1];
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/* Used to implement DW_CFA_remember_state. */
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struct frame_state_reg_info *prev;
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} regs;
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/* The CFA can be described in terms of a reg+offset or a
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location expression. */
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_Unwind_Sword cfa_offset;
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_Unwind_Word cfa_reg;
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const unsigned char *cfa_exp;
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enum {
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CFA_UNSET,
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CFA_REG_OFFSET,
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CFA_EXP
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} cfa_how;
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/* The PC described by the current frame state. */
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void *pc;
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/* The information we care about from the CIE/FDE. */
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_Unwind_Personality_Fn personality;
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_Unwind_Sword data_align;
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_Unwind_Word code_align;
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_Unwind_Word retaddr_column;
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unsigned char fde_encoding;
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unsigned char lsda_encoding;
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unsigned char saw_z;
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void *eh_ptr;
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} _Unwind_FrameState;
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