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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>
105 lines
2.9 KiB
ArmAsm
105 lines
2.9 KiB
ArmAsm
/* Machine-specific calling sequence for `mcount' profiling function. alpha
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Copyright (C) 1995-2021 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 after executing a function's prologue and without saving any
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registers. It is therefore necessary to preserve a0..a5 as they may
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contain function arguments. To work correctly with frame- less
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functions, it is also necessary to preserve ra. Finally, division
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routines are invoked with a special calling convention and the
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compiler treats those calls as if they were instructions. In
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particular, it doesn't save any of the temporary registers (caller
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saved registers). It is therefore necessary to preserve all
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caller-saved registers as well.
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Upon entering _mcount, register $at holds the return address and ra
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holds the return address of the function's caller (selfpc and frompc,
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respectively in gmon.c language...). */
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#include <sysdep.h>
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.set noat
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.set noreorder
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LEAF(_mcount, 0xb0)
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subq sp, 0xb0, sp
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.prologue 0
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stq a0, 0x00(sp)
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mov ra, a0 # a0 = caller-pc
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stq a1, 0x08(sp)
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mov $at, a1 # a1 = self-pc
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stq $at, 0x10(sp)
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stq a2, 0x18(sp)
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stq a3, 0x20(sp)
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stq a4, 0x28(sp)
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stq a5, 0x30(sp)
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stq ra, 0x38(sp)
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stq gp, 0x40(sp)
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br gp, 1f
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1: ldgp gp, 0(gp)
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stq t0, 0x48(sp)
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stq t1, 0x50(sp)
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stq t2, 0x58(sp)
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stq t3, 0x60(sp)
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stq t4, 0x68(sp)
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stq t5, 0x70(sp)
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stq t6, 0x78(sp)
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stq t7, 0x80(sp)
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stq t8, 0x88(sp)
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stq t9, 0x90(sp)
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stq t10, 0x98(sp)
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stq t11, 0xa0(sp)
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stq v0, 0xa8(sp)
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jsr ra, __mcount
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ldq a0, 0x00(sp)
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ldq a1, 0x08(sp)
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ldq $at, 0x10(sp) # restore self-pc
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ldq a2, 0x18(sp)
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ldq a3, 0x20(sp)
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ldq a4, 0x28(sp)
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ldq a5, 0x30(sp)
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ldq ra, 0x38(sp)
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ldq gp, 0x40(sp)
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mov $at, pv # make pv point to return address
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ldq t0, 0x48(sp) # this is important under OSF/1 to
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ldq t1, 0x50(sp) # ensure that the code that we return
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ldq t2, 0x58(sp) # can correctly compute its gp
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ldq t3, 0x60(sp)
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ldq t4, 0x68(sp)
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ldq t5, 0x70(sp)
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ldq t6, 0x78(sp)
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ldq t7, 0x80(sp)
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ldq t8, 0x88(sp)
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ldq t9, 0x90(sp)
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ldq t10, 0x98(sp)
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ldq t11, 0xa0(sp)
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ldq v0, 0xa8(sp)
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addq sp, 0xb0, sp
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ret zero,($at),1
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END(_mcount)
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weak_alias (_mcount, mcount)
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