105 lines
2.9 KiB
ArmAsm
105 lines
2.9 KiB
ArmAsm
|
/* Machine-specific calling sequence for `mcount' profiling function. alpha
|
||
|
|
Copyright (C) 1995-2022 Free Software Foundation, Inc.
|
||
|
|
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, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
/* 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 a0..a5 as they may
|
||
|
|
contain function arguments. To work correctly with frame- less
|
||
|
|
functions, it is also necessary to preserve ra. Finally, division
|
||
|
|
routines are invoked with a special calling convention and the
|
||
|
|
compiler treats those calls as if they were instructions. In
|
||
|
|
particular, it doesn't save any of the temporary registers (caller
|
||
|
|
saved registers). It is therefore necessary to preserve all
|
||
|
|
caller-saved registers as well.
|
||
|
|
|
||
|
|
Upon entering _mcount, register $at holds the return address and ra
|
||
|
|
holds the return address of the function's caller (selfpc and frompc,
|
||
|
|
respectively in gmon.c language...). */
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
.set noat
|
||
|
|
.set noreorder
|
||
|
|
|
||
|
|
LEAF(_mcount, 0xb0)
|
||
|
|
subq sp, 0xb0, sp
|
||
|
|
.prologue 0
|
||
|
|
stq a0, 0x00(sp)
|
||
|
|
mov ra, a0 # a0 = caller-pc
|
||
|
|
stq a1, 0x08(sp)
|
||
|
|
mov $at, a1 # a1 = self-pc
|
||
|
|
stq $at, 0x10(sp)
|
||
|
|
|
||
|
|
stq a2, 0x18(sp)
|
||
|
|
stq a3, 0x20(sp)
|
||
|
|
stq a4, 0x28(sp)
|
||
|
|
stq a5, 0x30(sp)
|
||
|
|
stq ra, 0x38(sp)
|
||
|
|
stq gp, 0x40(sp)
|
||
|
|
|
||
|
|
br gp, 1f
|
||
|
|
1: ldgp gp, 0(gp)
|
||
|
|
|
||
|
|
stq t0, 0x48(sp)
|
||
|
|
stq t1, 0x50(sp)
|
||
|
|
stq t2, 0x58(sp)
|
||
|
|
stq t3, 0x60(sp)
|
||
|
|
stq t4, 0x68(sp)
|
||
|
|
stq t5, 0x70(sp)
|
||
|
|
stq t6, 0x78(sp)
|
||
|
|
|
||
|
|
stq t7, 0x80(sp)
|
||
|
|
stq t8, 0x88(sp)
|
||
|
|
stq t9, 0x90(sp)
|
||
|
|
stq t10, 0x98(sp)
|
||
|
|
stq t11, 0xa0(sp)
|
||
|
|
stq v0, 0xa8(sp)
|
||
|
|
|
||
|
|
jsr ra, __mcount
|
||
|
|
|
||
|
|
ldq a0, 0x00(sp)
|
||
|
|
ldq a1, 0x08(sp)
|
||
|
|
ldq $at, 0x10(sp) # restore self-pc
|
||
|
|
ldq a2, 0x18(sp)
|
||
|
|
ldq a3, 0x20(sp)
|
||
|
|
ldq a4, 0x28(sp)
|
||
|
|
ldq a5, 0x30(sp)
|
||
|
|
ldq ra, 0x38(sp)
|
||
|
|
ldq gp, 0x40(sp)
|
||
|
|
mov $at, pv # make pv point to return address
|
||
|
|
ldq t0, 0x48(sp) # this is important under OSF/1 to
|
||
|
|
ldq t1, 0x50(sp) # ensure that the code that we return
|
||
|
|
ldq t2, 0x58(sp) # can correctly compute its gp
|
||
|
|
ldq t3, 0x60(sp)
|
||
|
|
ldq t4, 0x68(sp)
|
||
|
|
ldq t5, 0x70(sp)
|
||
|
|
ldq t6, 0x78(sp)
|
||
|
|
ldq t7, 0x80(sp)
|
||
|
|
ldq t8, 0x88(sp)
|
||
|
|
ldq t9, 0x90(sp)
|
||
|
|
ldq t10, 0x98(sp)
|
||
|
|
ldq t11, 0xa0(sp)
|
||
|
|
ldq v0, 0xa8(sp)
|
||
|
|
|
||
|
|
addq sp, 0xb0, sp
|
||
|
|
ret zero,($at),1
|
||
|
|
|
||
|
|
END(_mcount)
|
||
|
|
|
||
|
|
weak_alias (_mcount, mcount)
|