883312dc79
Current glibc no longer gives the ucontext_t type the tag struct ucontext, to conform with POSIX namespace rules. This requires various linux-unwind.h files in libgcc, that were previously using struct ucontext, to be fixed to use ucontext_t instead. This is similar to the removal of the struct siginfo tag from siginfo_t some years ago. This patch changes those files to use ucontext_t instead. As the standard name that should be unconditionally safe, so this is not restricted to architectures supported by glibc, or conditioned on the glibc version. Tested compilation together with current glibc with glibc's build-many-glibcs.py. * config/aarch64/linux-unwind.h (aarch64_fallback_frame_state), config/alpha/linux-unwind.h (alpha_fallback_frame_state), config/bfin/linux-unwind.h (bfin_fallback_frame_state), config/i386/linux-unwind.h (x86_64_fallback_frame_state, x86_fallback_frame_state), config/m68k/linux-unwind.h (struct uw_ucontext), config/nios2/linux-unwind.h (struct nios2_ucontext), config/pa/linux-unwind.h (pa32_fallback_frame_state), config/riscv/linux-unwind.h (riscv_fallback_frame_state), config/sh/linux-unwind.h (sh_fallback_frame_state), config/tilepro/linux-unwind.h (tile_fallback_frame_state), config/xtensa/linux-unwind.h (xtensa_fallback_frame_state): Use ucontext_t instead of struct ucontext. From-SVN: r249731
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/* DWARF2 EH unwinding support for TILEPro.
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Copyright (C) 2011-2017 Free Software Foundation, Inc.
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Contributed by Walter Lee (walt@tilera.com)
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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
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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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any later version.
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GCC 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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef inhibit_libc
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#include <arch/abi.h>
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#include <signal.h>
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#include <sys/ucontext.h>
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#include <linux/unistd.h>
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/* Macro to define a copy of the kernel's __rt_sigreturn function
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(in arch/tile/kernel/entry.S). If that function is changed,
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this one needs to be changed to match it. */
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#define _sigreturn_asm(REG, NR) asm( \
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".pushsection .text.__rt_sigreturn,\"a\"\n" \
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".global __rt_sigreturn\n" \
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".type __rt_sigreturn,@function\n" \
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"__rt_sigreturn:\n" \
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"moveli " #REG ", " #NR "\n" \
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"swint1\n" \
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".size __rt_sigreturn, . - __rt_sigreturn\n" \
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".popsection")
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#define sigreturn_asm(REG, NR) _sigreturn_asm(REG, NR)
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sigreturn_asm (TREG_SYSCALL_NR_NAME, __NR_rt_sigreturn);
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#define SIGRETURN_LEN 16
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extern char __rt_sigreturn[];
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#define MD_FALLBACK_FRAME_STATE_FOR tile_fallback_frame_state
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static _Unwind_Reason_Code
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tile_fallback_frame_state (struct _Unwind_Context *context,
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_Unwind_FrameState *fs)
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{
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unsigned char *pc = context->ra;
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struct sigcontext *sc;
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long new_cfa;
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int i;
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struct rt_sigframe {
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unsigned char save_area[C_ABI_SAVE_AREA_SIZE];
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siginfo_t info;
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ucontext_t uc;
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} *rt_;
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/* Return if this is not a signal handler. */
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if (memcmp (pc, __rt_sigreturn, SIGRETURN_LEN) != 0)
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return _URC_END_OF_STACK;
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/* It was a signal handler; update the reported PC to point to our
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copy, since that will be findable with dladdr() and therefore
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somewhat easier to help understand what actually happened. */
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context->ra = __rt_sigreturn;
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rt_ = context->cfa;
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sc = &rt_->uc.uc_mcontext;
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new_cfa = sc->sp;
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fs->regs.cfa_how = CFA_REG_OFFSET;
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fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__;
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fs->regs.cfa_offset = new_cfa - (long) context->cfa;
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for (i = 0; i < 56; ++i)
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{
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fs->regs.reg[i].how = REG_SAVED_OFFSET;
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fs->regs.reg[i].loc.offset
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= (long)&sc->gregs[i] - new_cfa;
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}
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fs->regs.reg[56].how = REG_SAVED_OFFSET;
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fs->regs.reg[56].loc.offset = (long)&sc->pc - new_cfa;
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fs->retaddr_column = 56;
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fs->signal_frame = 1;
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return _URC_NO_REASON;
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}
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#endif /* ifdef inhibit_libc */
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