mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
92 lines
2.9 KiB
ArmAsm
92 lines
2.9 KiB
ArmAsm
/* Machine-specific calling sequence for `mcount' profiling function. ia64
|
|
Copyright (C) 2000 Free Software Foundation, Inc.
|
|
Contributed by David Mosberger <davidm@hpl.hp.com>
|
|
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 before executing a function's prologue and without saving
|
|
any registers. It is therefore necessary to preserve the input
|
|
registers as they may contain function arguments. To work
|
|
correctly with frame-less functions, it is also necessary to
|
|
preserve the return pointer (b0 aka rp).
|
|
|
|
State upon entering _mcount:
|
|
|
|
r8 address of return value structure (used only when called
|
|
function returns a large structure)
|
|
r15 static link (used only for nested functions)
|
|
in0 ar.pfs to restore before returning to the function that
|
|
called _mcount
|
|
in1 gp value to restore before returning to the function that
|
|
called _mcount
|
|
in2 return address in the function that invoked the caller
|
|
of _mcount (frompc)
|
|
in3 address of the global-offset table entry that holds the
|
|
profile count dword allocated by the compiler; to get
|
|
the address of this dword, use "ld8 in2=[in2]; this
|
|
dword can be used in any way by _mcount (including
|
|
not at all, as is the case with the current implementation)
|
|
b0 address to return to after _mcount is done
|
|
*/
|
|
|
|
#include <sysdep.h>
|
|
|
|
#undef ret
|
|
|
|
LEAF(_mcount)
|
|
.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(4)
|
|
alloc loc1 = ar.pfs, 4, 4, 3, 0
|
|
mov loc0 = rp
|
|
.body
|
|
mov loc2 = r8 // gcc uses r8 to pass pointer to return structure
|
|
;;
|
|
mov loc3 = r15 // gcc uses r15 to pass the static link to nested functions
|
|
mov out0 = in2
|
|
mov out1 = rp
|
|
br.call.sptk.few rp = __mcount
|
|
;;
|
|
.here:
|
|
{
|
|
.mii
|
|
mov gp = in1
|
|
mov r2 = ip
|
|
mov ar.pfs = loc1
|
|
}
|
|
;;
|
|
adds r2 = _mcount_ret_helper - .here, r2
|
|
mov b7 = loc0
|
|
mov rp = in2
|
|
;;
|
|
mov r8 = loc2
|
|
mov r15 = loc3
|
|
mov b6 = r2
|
|
br.ret.sptk.few b6
|
|
END(_mcount)
|
|
|
|
LOCAL_LEAF(_mcount_ret_helper)
|
|
.prologue
|
|
.altrp b7
|
|
.save ar.pfs, r40
|
|
.body
|
|
alloc r2 = ar.pfs, 0, 0, 9, 0
|
|
mov ar.pfs = r40
|
|
br b7
|
|
END(_mcount_ret_helper)
|
|
|
|
weak_alias (_mcount, mcount)
|