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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>
91 lines
2.8 KiB
ArmAsm
91 lines
2.8 KiB
ArmAsm
/* Machine-specific calling sequence for `mcount' profiling function. ia64
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Copyright (C) 2000-2021 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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/* Assembly stub to invoke _mcount(). Compiler generated code calls
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this stub before executing a function's prologue and without saving
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any registers. It is therefore necessary to preserve the input
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registers as they may contain function arguments. To work
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correctly with frame-less functions, it is also necessary to
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preserve the return pointer (b0 aka rp).
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State upon entering _mcount:
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r8 address of return value structure (used only when called
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function returns a large structure)
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r15 static link (used only for nested functions)
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in0 ar.pfs to restore before returning to the function that
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called _mcount
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in1 gp value to restore before returning to the function that
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called _mcount
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in2 return address in the function that invoked the caller
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of _mcount (frompc)
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in3 address of the global-offset table entry that holds the
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profile count dword allocated by the compiler; to get
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the address of this dword, use "ld8 in2=[in2]; this
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dword can be used in any way by _mcount (including
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not at all, as is the case with the current implementation)
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b0 address to return to after _mcount is done
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*/
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#include <sysdep.h>
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#undef ret
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LEAF(_mcount)
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.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
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alloc loc1 = ar.pfs, 4, 4, 3, 0
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mov loc0 = rp
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.body
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mov loc2 = r8 // gcc uses r8 to pass pointer to return structure
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;;
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mov loc3 = r15 // gcc uses r15 to pass the static link to nested functions
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mov out0 = in2
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mov out1 = rp
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br.call.sptk.few rp = __mcount
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;;
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.here:
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{
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.mii
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mov gp = in1
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mov r2 = ip
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mov ar.pfs = loc1
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}
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;;
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adds r2 = _mcount_ret_helper - .here, r2
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mov b7 = loc0
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mov rp = in2
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;;
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mov r3 = in0
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mov r8 = loc2
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mov r15 = loc3
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mov b6 = r2
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br.ret.sptk.few b6
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END(_mcount)
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LOCAL_LEAF(_mcount_ret_helper)
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.prologue
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.altrp b7
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.save ar.pfs, r3
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.body
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alloc r2 = ar.pfs, 0, 0, 8, 0
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mov ar.pfs = r3
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br b7
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END(_mcount_ret_helper)
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weak_alias (_mcount, mcount)
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