7b1ae0e73a
The stack used by checkasm_checked_call_vfp was a multiple of 4 when the checked function is called. AAPCS requires a double word (8 byte) aligned stack public interfaces. Since both calls are public interfaces the stack is misaligned when the checked is called. Might fix the SIGBUS error in the armv7-linux-clang-3.7 fate config.
146 lines
3.7 KiB
ArmAsm
146 lines
3.7 KiB
ArmAsm
/****************************************************************************
|
|
* Assembly testing and benchmarking tool
|
|
* Copyright (c) 2015 Martin Storsjo
|
|
* Copyright (c) 2015 Janne Grunau
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Libav 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
|
|
*****************************************************************************/
|
|
|
|
#include "libavutil/arm/asm.S"
|
|
|
|
const register_init, align=3
|
|
.quad 0x21f86d66c8ca00ce
|
|
.quad 0x75b6ba21077c48ad
|
|
.quad 0xed56bb2dcb3c7736
|
|
.quad 0x8bda43d3fd1a7e06
|
|
.quad 0xb64a9c9e5d318408
|
|
.quad 0xdf9a54b303f1d3a3
|
|
.quad 0x4a75479abd64e097
|
|
.quad 0x249214109d5d1c88
|
|
endconst
|
|
|
|
const error_message
|
|
.asciz "failed to preserve register"
|
|
endconst
|
|
|
|
@ max number of args used by any asm function.
|
|
#define MAX_ARGS 15
|
|
|
|
#define ARG_STACK 4*(MAX_ARGS - 2)
|
|
|
|
@ align the used stack space to 8 to preserve the stack alignment
|
|
#define ARG_STACK_A (((ARG_STACK + pushed + 7) & ~7) - pushed)
|
|
|
|
.macro clobbercheck variant
|
|
.equ pushed, 4*9
|
|
function checkasm_checked_call_\variant, export=1
|
|
push {r4-r11, lr}
|
|
.ifc \variant, vfp
|
|
vpush {d8-d15}
|
|
fmrx r4, FPSCR
|
|
push {r4}
|
|
.equ pushed, pushed + 16*4 + 4
|
|
.endif
|
|
|
|
movrel r12, register_init
|
|
.ifc \variant, vfp
|
|
vldm r12, {d8-d15}
|
|
.endif
|
|
ldm r12, {r4-r11}
|
|
|
|
sub sp, sp, #ARG_STACK_A
|
|
.equ pos, 0
|
|
.rept MAX_ARGS-2
|
|
ldr r12, [sp, #ARG_STACK_A + pushed + 8 + pos]
|
|
str r12, [sp, #pos]
|
|
.equ pos, pos + 4
|
|
.endr
|
|
|
|
mov r12, r0
|
|
mov r0, r2
|
|
mov r1, r3
|
|
ldrd r2, r3, [sp, #ARG_STACK_A + pushed]
|
|
blx r12
|
|
add sp, sp, #ARG_STACK_A
|
|
|
|
push {r0, r1}
|
|
movrel r12, register_init
|
|
mov r3, #0
|
|
.ifc \variant, vfp
|
|
.macro check_reg_vfp, dreg, inc=8
|
|
ldrd r0, r1, [r12], #\inc
|
|
vmov r2, lr, \dreg
|
|
eor r0, r0, r2
|
|
eor r1, r1, lr
|
|
orr r3, r3, r0
|
|
orr r3, r3, r1
|
|
.endm
|
|
|
|
.irp n, 8, 9, 10, 11, 12, 13, 14
|
|
check_reg_vfp d\n
|
|
.endr
|
|
check_reg_vfp d15, -56
|
|
.purgem check_reg_vfp
|
|
|
|
fmrx r0, FPSCR
|
|
ldr r1, [sp, #8]
|
|
eor r0, r0, r1
|
|
@ Ignore changes in the topmost 5 bits
|
|
lsl r0, r0, #5
|
|
orr r3, r3, r0
|
|
.endif
|
|
|
|
.macro check_reg reg1, reg2=
|
|
ldrd r0, r1, [r12], #8
|
|
eor r0, r0, \reg1
|
|
orrs r3, r3, r0
|
|
.ifnb \reg2
|
|
eor r1, r1, \reg2
|
|
orrs r3, r3, r1
|
|
.endif
|
|
.endm
|
|
check_reg r4, r5
|
|
check_reg r6, r7
|
|
@ r9 is a volatile register in the ios ABI
|
|
#ifdef __APPLE__
|
|
check_reg r8
|
|
#else
|
|
check_reg r8, r9
|
|
#endif
|
|
check_reg r10, r11
|
|
.purgem check_reg
|
|
|
|
beq 0f
|
|
|
|
movrel r0, error_message
|
|
blx X(checkasm_fail_func)
|
|
0:
|
|
pop {r0, r1}
|
|
.ifc \variant, vfp
|
|
pop {r2}
|
|
fmxr FPSCR, r2
|
|
vpop {d8-d15}
|
|
.endif
|
|
pop {r4-r11, pc}
|
|
endfunc
|
|
.endm
|
|
|
|
#if HAVE_VFP || HAVE_NEON
|
|
clobbercheck vfp
|
|
#endif
|
|
clobbercheck novfp
|