mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 12:11:10 +00:00
68 lines
2.2 KiB
ArmAsm
68 lines
2.2 KiB
ArmAsm
/* Machine-specific calling sequence for `mcount' profiling function. x86-64 version.
|
|
Copyright (C) 2002 Free Software Foundation, Inc.
|
|
Contributed by Andreas Jaeger <aj@suse.de>.
|
|
This file is part of the GNU C Library.
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
/* Assembly stub to invoke _mcount(). Compiler generated code calls
|
|
this stub after executing a function's prologue and without saving any
|
|
registers. It is therefore necessary to preserve %rcx, %rdx, %rsi, %rdi,
|
|
%r8, %r9 as they may contain function arguments. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(_mcount)
|
|
ASM_TYPE_DIRECTIVE(C_SYMBOL_NAME(_mcount), @function)
|
|
.align ALIGNARG(4)
|
|
C_LABEL(_mcount)
|
|
/* Allocate space for 7 registers. */
|
|
subq $56,%rsp
|
|
movq %rax,(%rsp)
|
|
movq %rcx,8(%rsp)
|
|
movq %rdx,16(%rsp)
|
|
movq %rsi,24(%rsp)
|
|
movq %rdi,32(%rsp)
|
|
movq %r8,40(%rsp)
|
|
movq %r9,48(%rsp)
|
|
|
|
/* Setup parameter for __mcount_internal. */
|
|
/* selfpc is the return address on the stack. */
|
|
movq 56(%rsp),%rsi
|
|
/* Get frompc via the frame pointer. */
|
|
movq 8(%rbp),%rdi
|
|
#ifdef PIC
|
|
call C_SYMBOL_NAME(__mcount_internal)@PLT
|
|
#else
|
|
call C_SYMBOL_NAME(__mcount_internal)
|
|
#endif
|
|
/* Pop the saved registers. Please note that `mcount' has no
|
|
return value. */
|
|
movq 48(%rsp),%r9
|
|
movq 40(%rsp),%r8
|
|
movq 32(%rsp),%rdi
|
|
movq 24(%rsp),%rsi
|
|
movq 16(%rsp),%rdx
|
|
movq 8(%rsp),%rcx
|
|
movq (%rsp),%rax
|
|
addq $56,%rsp
|
|
ret
|
|
|
|
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(_mcount))
|
|
|
|
#undef mcount
|
|
weak_alias(_mcount, mcount)
|