199 lines
6.8 KiB
ArmAsm
Executable File
199 lines
6.8 KiB
ArmAsm
Executable File
/****************************************************************************
|
|
* Assembly testing and benchmarking tool
|
|
* Copyright (c) 2015 Martin Storsjo
|
|
* Copyright (c) 2015 Janne Grunau
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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/aarch64/asm.S"
|
|
|
|
const register_init, align=4
|
|
.quad 0x21f86d66c8ca00ce
|
|
.quad 0x75b6ba21077c48ad
|
|
.quad 0xed56bb2dcb3c7736
|
|
.quad 0x8bda43d3fd1a7e06
|
|
.quad 0xb64a9c9e5d318408
|
|
.quad 0xdf9a54b303f1d3a3
|
|
.quad 0x4a75479abd64e097
|
|
.quad 0x249214109d5d1c88
|
|
.quad 0x1a1b2550a612b48c
|
|
.quad 0x79445c159ce79064
|
|
.quad 0x2eed899d5a28ddcd
|
|
.quad 0x86b2536fcd8cf636
|
|
.quad 0xb0856806085e7943
|
|
.quad 0x3f2bf84fc0fcca4e
|
|
.quad 0xacbd382dcf5b8de2
|
|
.quad 0xd229e1f5b281303f
|
|
.quad 0x71aeaff20b095fd9
|
|
.quad 0xab63e2e11fa38ed9
|
|
endconst
|
|
|
|
|
|
const error_message_register
|
|
.asciz "failed to preserve register"
|
|
error_message_stack:
|
|
.asciz "stack clobbered"
|
|
endconst
|
|
|
|
|
|
// max number of args used by any asm function.
|
|
#define MAX_ARGS 15
|
|
|
|
#define CLOBBER_STACK ((8*MAX_ARGS + 15) & ~15)
|
|
|
|
function checkasm_stack_clobber, export=1
|
|
mov x3, sp
|
|
mov x2, #CLOBBER_STACK
|
|
1:
|
|
stp x0, x1, [sp, #-16]!
|
|
subs x2, x2, #16
|
|
b.gt 1b
|
|
mov sp, x3
|
|
ret
|
|
endfunc
|
|
|
|
// + 16 for stack canary reference
|
|
#define ARG_STACK ((8*(MAX_ARGS - 8) + 15) & ~15 + 16)
|
|
|
|
function checkasm_checked_call, export=1
|
|
stp x29, x30, [sp, #-16]!
|
|
mov x29, sp
|
|
stp x19, x20, [sp, #-16]!
|
|
stp x21, x22, [sp, #-16]!
|
|
stp x23, x24, [sp, #-16]!
|
|
stp x25, x26, [sp, #-16]!
|
|
stp x27, x28, [sp, #-16]!
|
|
stp d8, d9, [sp, #-16]!
|
|
stp d10, d11, [sp, #-16]!
|
|
stp d12, d13, [sp, #-16]!
|
|
stp d14, d15, [sp, #-16]!
|
|
|
|
movrel x9, register_init
|
|
ldp d8, d9, [x9], #16
|
|
ldp d10, d11, [x9], #16
|
|
ldp d12, d13, [x9], #16
|
|
ldp d14, d15, [x9], #16
|
|
ldp x19, x20, [x9], #16
|
|
ldp x21, x22, [x9], #16
|
|
ldp x23, x24, [x9], #16
|
|
ldp x25, x26, [x9], #16
|
|
ldp x27, x28, [x9], #16
|
|
|
|
sub sp, sp, #ARG_STACK
|
|
.equ pos, 0
|
|
.rept MAX_ARGS-8
|
|
// Skip the first 8 args, that are loaded into registers
|
|
ldr x9, [x29, #16 + 8*8 + pos]
|
|
str x9, [sp, #pos]
|
|
.equ pos, pos + 8
|
|
.endr
|
|
|
|
// Fill x8-x17 with garbage. This doesn't have to be preserved,
|
|
// but avoids relying on them having any particular value.
|
|
movrel x9, register_init
|
|
ldp x10, x11, [x9], #32
|
|
ldp x12, x13, [x9], #32
|
|
ldp x14, x15, [x9], #32
|
|
ldp x16, x17, [x9], #32
|
|
ldp x8, x9, [x9]
|
|
|
|
// For stack overflows, the callee is free to overwrite the parameters
|
|
// that were passed on the stack (if any), so we can only check after
|
|
// that point. First figure out how many parameters the function
|
|
// really took on the stack:
|
|
ldr w2, [x29, #16 + 8*8 + (MAX_ARGS-8)*8]
|
|
// Load the first non-parameter value from the stack, that should be
|
|
// left untouched by the function. Store a copy of it inverted, so that
|
|
// e.g. overwriting everything with zero would be noticed.
|
|
ldr x2, [sp, x2, lsl #3]
|
|
mvn x2, x2
|
|
str x2, [sp, #ARG_STACK-8]
|
|
|
|
// Load the in-register arguments
|
|
mov x12, x0
|
|
ldp x0, x1, [x29, #16]
|
|
ldp x2, x3, [x29, #32]
|
|
ldp x4, x5, [x29, #48]
|
|
ldp x6, x7, [x29, #64]
|
|
// Call the target function
|
|
blr x12
|
|
|
|
// Load the number of stack parameters, stack canary and its reference
|
|
ldr w2, [x29, #16 + 8*8 + (MAX_ARGS-8)*8]
|
|
ldr x2, [sp, x2, lsl #3]
|
|
ldr x3, [sp, #ARG_STACK-8]
|
|
|
|
add sp, sp, #ARG_STACK
|
|
stp x0, x1, [sp, #-16]!
|
|
|
|
mvn x3, x3
|
|
cmp x2, x3
|
|
b.ne 2f
|
|
|
|
movrel x9, register_init
|
|
movi v3.8h, #0
|
|
|
|
.macro check_reg_neon reg1, reg2
|
|
ldr q1, [x9], #16
|
|
uzp1 v2.2d, v\reg1\().2d, v\reg2\().2d
|
|
eor v1.16b, v1.16b, v2.16b
|
|
orr v3.16b, v3.16b, v1.16b
|
|
.endm
|
|
check_reg_neon 8, 9
|
|
check_reg_neon 10, 11
|
|
check_reg_neon 12, 13
|
|
check_reg_neon 14, 15
|
|
uqxtn v3.8b, v3.8h
|
|
umov x3, v3.d[0]
|
|
|
|
.macro check_reg reg1, reg2
|
|
ldp x0, x1, [x9], #16
|
|
eor x0, x0, \reg1
|
|
eor x1, x1, \reg2
|
|
orr x3, x3, x0
|
|
orr x3, x3, x1
|
|
.endm
|
|
check_reg x19, x20
|
|
check_reg x21, x22
|
|
check_reg x23, x24
|
|
check_reg x25, x26
|
|
check_reg x27, x28
|
|
|
|
cbz x3, 0f
|
|
|
|
movrel x0, error_message_register
|
|
b 1f
|
|
2:
|
|
movrel x0, error_message_stack
|
|
1:
|
|
bl X(checkasm_fail_func)
|
|
0:
|
|
ldp x0, x1, [sp], #16
|
|
ldp d14, d15, [sp], #16
|
|
ldp d12, d13, [sp], #16
|
|
ldp d10, d11, [sp], #16
|
|
ldp d8, d9, [sp], #16
|
|
ldp x27, x28, [sp], #16
|
|
ldp x25, x26, [sp], #16
|
|
ldp x23, x24, [sp], #16
|
|
ldp x21, x22, [sp], #16
|
|
ldp x19, x20, [sp], #16
|
|
ldp x29, x30, [sp], #16
|
|
ret
|
|
endfunc
|