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Diffstat (limited to 'gcc/config/mips/linux-unwind.h')
| -rw-r--r-- | gcc/config/mips/linux-unwind.h | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/gcc/config/mips/linux-unwind.h b/gcc/config/mips/linux-unwind.h deleted file mode 100644 index 02f7cd54c5a..00000000000 --- a/gcc/config/mips/linux-unwind.h +++ /dev/null @@ -1,120 +0,0 @@ -/* DWARF2 EH unwinding support for MIPS Linux. - Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 3, or (at your option) -any later version. - -GCC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -Under Section 7 of GPL version 3, you are granted additional -permissions described in the GCC Runtime Library Exception, version -3.1, as published by the Free Software Foundation. - -You should have received a copy of the GNU General Public License and -a copy of the GCC Runtime Library Exception along with this program; -see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -<http://www.gnu.org/licenses/>. */ - -#ifndef inhibit_libc -/* Do code reading to identify a signal frame, and set the frame - state data appropriately. See unwind-dw2.c for the structs. */ - -#include <signal.h> -#include <asm/unistd.h> - -/* The third parameter to the signal handler points to something with - * this structure defined in asm/ucontext.h, but the name clashes with - * struct ucontext from sys/ucontext.h so this private copy is used. */ -typedef struct _sig_ucontext { - unsigned long uc_flags; - struct _sig_ucontext *uc_link; - stack_t uc_stack; - struct sigcontext uc_mcontext; - sigset_t uc_sigmask; -} _sig_ucontext_t; - -#define MD_FALLBACK_FRAME_STATE_FOR mips_fallback_frame_state - -static _Unwind_Reason_Code -mips_fallback_frame_state (struct _Unwind_Context *context, - _Unwind_FrameState *fs) -{ - u_int32_t *pc = (u_int32_t *) context->ra; - struct sigcontext *sc; - _Unwind_Ptr new_cfa, reg_offset; - int i; - - /* 24021061 li v0, 0x1061 (rt_sigreturn)*/ - /* 0000000c syscall */ - /* or */ - /* 24021017 li v0, 0x1017 (sigreturn) */ - /* 0000000c syscall */ - if (pc[1] != 0x0000000c) - return _URC_END_OF_STACK; -#if _MIPS_SIM == _ABIO32 - if (pc[0] == (0x24020000 | __NR_sigreturn)) - { - struct sigframe { - u_int32_t ass[4]; /* Argument save space for o32. */ - u_int32_t trampoline[2]; - struct sigcontext sigctx; - } *rt_ = context->cfa; - sc = &rt_->sigctx; - } - else -#endif - if (pc[0] == (0x24020000 | __NR_rt_sigreturn)) - { - struct rt_sigframe { - u_int32_t ass[4]; /* Argument save space for o32. */ - u_int32_t trampoline[2]; - struct siginfo info; - _sig_ucontext_t uc; - } *rt_ = context->cfa; - sc = &rt_->uc.uc_mcontext; - } - else - return _URC_END_OF_STACK; - - new_cfa = (_Unwind_Ptr) sc; - fs->regs.cfa_how = CFA_REG_OFFSET; - fs->regs.cfa_reg = STACK_POINTER_REGNUM; - fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa; - - /* On o32 Linux, the register save slots in the sigcontext are - eight bytes. We need the lower half of each register slot, - so slide our view of the structure back four bytes. */ -#if _MIPS_SIM == _ABIO32 && defined __MIPSEB__ - reg_offset = 4; -#else - reg_offset = 0; -#endif - - for (i = 0; i < 32; i++) { - fs->regs.reg[i].how = REG_SAVED_OFFSET; - fs->regs.reg[i].loc.offset - = (_Unwind_Ptr)&(sc->sc_regs[i]) + reg_offset - new_cfa; - } - /* "PC & -2" points to the faulting instruction, but the unwind code - searches for "(ADDR & -2) - 1". (See MASK_RETURN_ADDR for the source - of the -2 mask.) Adding 2 here ensures that "(ADDR & -2) - 1" is the - address of the second byte of the faulting instruction. - - Note that setting fs->signal_frame would not work. As the comment - above MASK_RETURN_ADDR explains, MIPS unwinders must earch for an - odd-valued address. */ - fs->regs.reg[DWARF_ALT_FRAME_RETURN_COLUMN].how = REG_SAVED_VAL_OFFSET; - fs->regs.reg[DWARF_ALT_FRAME_RETURN_COLUMN].loc.offset - = (_Unwind_Ptr)(sc->sc_pc) + 2 - new_cfa; - fs->retaddr_column = DWARF_ALT_FRAME_RETURN_COLUMN; - - return _URC_NO_REASON; -} -#endif |