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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
87 lines
2.6 KiB
ArmAsm
87 lines
2.6 KiB
ArmAsm
/* Copyright (C) 1998-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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/* To enable unwinding through the signal frame without special hackery
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elsewhere, describe the entire struct sigcontext with unwind info.
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In order to minimize the size of the encoding, we set the CFA to the
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end of the sigcontext, which makes all of the registers have small
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negative offsets from that. */
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.macro SIGCONTEXT_REGS_I base, from=0
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cfi_offset (\from, \base + (4 + \from) * 8)
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.if 30-\from
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SIGCONTEXT_REGS_I \base, "(\from+1)"
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.endif
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.endm
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.macro SIGCONTEXT_REGS_F base, from=32
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cfi_offset (\from, \base + (4 + 1 + \from) * 8)
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.if 62-\from
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SIGCONTEXT_REGS_F \base, "(\from+1)"
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.endif
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.endm
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.macro SIGCONTEXT_REGS base
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SIGCONTEXT_REGS_I \base
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SIGCONTEXT_REGS_F \base
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cfi_offset (63, \base + (4 + 32 + 1 + 32) * 8)
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cfi_offset (64, \base + 2 * 8)
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.endm
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cfi_startproc
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cfi_return_column (64)
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.cfi_signal_frame
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SIGCONTEXT_REGS -648
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cfi_def_cfa_offset (648)
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/* While this frame is marked as a signal frame, that only applies
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to how this return address is handled for the outer frame.
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The return address that arrived here, from the inner frame, is
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not marked as a signal frame and so the unwinder still tries to
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subtract 1 to examine the presumed call insn. Thus we must
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extend the unwind info to a nop before the start. */
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nop
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.align 4
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__syscall_sigreturn:
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mov sp, a0
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ldi v0, __NR_sigreturn
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callsys
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.size __syscall_sigreturn, .-__syscall_sigreturn
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.type __syscall_sigreturn, @function
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.global __syscall_sigreturn;
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.hidden __syscall_sigreturn;
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/* See above wrt including the nop. */
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cfi_def_cfa_offset (176 + 648)
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nop
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.align 4
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__syscall_rt_sigreturn:
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mov sp,a0
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ldi v0,__NR_rt_sigreturn
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callsys
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.size __syscall_rt_sigreturn, .-__syscall_rt_sigreturn
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.type __syscall_rt_sigreturn, @function
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.global __syscall_rt_sigreturn;
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.hidden __syscall_rt_sigreturn;
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cfi_endproc
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