mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
88 lines
3.1 KiB
ArmAsm
88 lines
3.1 KiB
ArmAsm
/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
Based on work contributed by David Mosberger (davidm@cs.arizona.edu).
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* Assembly stub to invoke __mcount_internal(). Compiler-generated
|
|
code calls mcount after executing a function's prologue, placing
|
|
the "lr" register in "r10" for the call. As a result "lr" is the
|
|
function that invoked mcount, and "r10" is mcount's caller's
|
|
caller. However, we have to save all the parameter registers here
|
|
before invoking _mcount_internal. Callee-save and temporary
|
|
registers need no special attention. We save r10 and restore it to
|
|
lr on the way out, to properly handle the case of ENTRY() in
|
|
assembly code, before lr is saved. We use the name __mcount since
|
|
the gcc community prefers using the reserved namespace. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.text
|
|
ENTRY(__mcount)
|
|
{
|
|
ST sp, lr
|
|
ADDI_PTR r29, sp, - (12 * REGSIZE)
|
|
}
|
|
cfi_offset (lr, 0)
|
|
{
|
|
ADDI_PTR sp, sp, - (13 * REGSIZE)
|
|
ST r29, sp
|
|
ADDI_PTR r29, r29, REGSIZE
|
|
}
|
|
cfi_def_cfa_offset (13 * REGSIZE)
|
|
{ ST r29, r0; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r1; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r2; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r3; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r4; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r5; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r6; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r7; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r8; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r9; ADDI_PTR r29, r29, REGSIZE }
|
|
{ ST r29, r10; ADDI_PTR r29, r29, REGSIZE; move r0, r10 }
|
|
{
|
|
move r1, lr
|
|
jal __mcount_internal
|
|
}
|
|
{
|
|
ADDI_PTR r29, sp, (2 * REGSIZE)
|
|
}
|
|
{ LD r0, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r1, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r2, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r3, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r4, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r5, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r6, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r7, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r8, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r9, r29; ADDI_PTR r29, r29, REGSIZE }
|
|
{ LD r10, r29; ADDI_PTR sp, sp, (13 * REGSIZE) }
|
|
cfi_def_cfa_offset (0)
|
|
{
|
|
LD lr, sp
|
|
}
|
|
{
|
|
move lr, r10
|
|
jrp lr
|
|
}
|
|
END(__mcount)
|
|
|
|
#undef mcount
|
|
weak_alias (__mcount, _mcount) /* exported in gmon/Versions */
|
|
weak_alias (__mcount, mcount) /* exported in stdlib/Versions */
|