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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>
125 lines
3.5 KiB
ArmAsm
125 lines
3.5 KiB
ArmAsm
/* Machine-specific calling sequence for `mcount' profiling function. x86-64 version.
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Copyright (C) 2002-2021 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 %rcx, %rdx, %rsi, %rdi,
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%r8, %r9 as they may contain function arguments. */
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#include <sysdep.h>
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ENTRY(_mcount)
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/* Allocate space for 7 registers. */
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subq $56,%rsp
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cfi_adjust_cfa_offset (56)
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movq %rax,(%rsp)
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cfi_rel_offset (rax, 0)
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movq %rcx,8(%rsp)
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cfi_rel_offset (rcx, 8)
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movq %rdx,16(%rsp)
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cfi_rel_offset (rdx, 16)
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movq %rsi,24(%rsp)
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cfi_rel_offset (rsi, 24)
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movq %rdi,32(%rsp)
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cfi_rel_offset (rdi, 32)
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movq %r8,40(%rsp)
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cfi_rel_offset (r8, 40)
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movq %r9,48(%rsp)
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cfi_rel_offset (r9, 48)
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/* Setup parameter for __mcount_internal. */
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/* selfpc is the return address on the stack. */
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movq 56(%rsp),%rsi
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/* Get frompc via the frame pointer. */
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movq 8(%rbp),%rdi
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call C_SYMBOL_NAME(__mcount_internal)
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/* Pop the saved registers. Please note that `mcount' has no
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return value. */
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movq 48(%rsp),%r9
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cfi_restore (r9)
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movq 40(%rsp),%r8
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cfi_restore (r8)
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movq 32(%rsp),%rdi
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cfi_restore (rdi)
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movq 24(%rsp),%rsi
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cfi_restore (rsi)
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movq 16(%rsp),%rdx
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cfi_restore (rdx)
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movq 8(%rsp),%rcx
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cfi_restore (rcx)
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movq (%rsp),%rax
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cfi_restore (rax)
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addq $56,%rsp
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cfi_adjust_cfa_offset (-56)
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ret
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END(_mcount)
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#undef mcount
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weak_alias (_mcount, mcount)
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/* __fentry__ is different from _mcount in that it is called before
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function prolog. This means (among other things) that it has non-standard
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stack alignment on entry: (%RSP & 0xF) == 0. */
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ENTRY(__fentry__)
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/* Allocate space for 7 registers
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(+8 bytes for proper stack alignment). */
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subq $64,%rsp
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cfi_adjust_cfa_offset (64)
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movq %rax,(%rsp)
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cfi_rel_offset (rax, 0)
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movq %rcx,8(%rsp)
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cfi_rel_offset (rcx, 8)
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movq %rdx,16(%rsp)
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cfi_rel_offset (rdx, 16)
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movq %rsi,24(%rsp)
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cfi_rel_offset (rsi, 24)
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movq %rdi,32(%rsp)
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cfi_rel_offset (rdi, 32)
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movq %r8,40(%rsp)
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cfi_rel_offset (r8, 40)
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movq %r9,48(%rsp)
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cfi_rel_offset (r9, 48)
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/* Setup parameter for __mcount_internal. */
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/* selfpc is the return address on the stack. */
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movq 64(%rsp),%rsi
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/* caller is the return address above it */
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movq 72(%rsp),%rdi
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call C_SYMBOL_NAME(__mcount_internal)
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/* Pop the saved registers. Please note that `__fentry__' has no
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return value. */
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movq 48(%rsp),%r9
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cfi_restore (r9)
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movq 40(%rsp),%r8
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cfi_restore (r8)
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movq 32(%rsp),%rdi
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cfi_restore (rdi)
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movq 24(%rsp),%rsi
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cfi_restore (rsi)
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movq 16(%rsp),%rdx
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cfi_restore (rdx)
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movq 8(%rsp),%rcx
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cfi_restore (rcx)
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movq (%rsp),%rax
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cfi_restore (rax)
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addq $64,%rsp
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cfi_adjust_cfa_offset (-64)
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ret
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END(__fentry__)
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