ref: 47daa4df3387c1529536243db80b81f3878cbf76
dir: /tests/checkasm/x86/checkasm.asm/
; Copyright © 2018, VideoLAN and dav1d authors
; Copyright © 2018, Two Orioles, LLC
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are met:
;
; 1. Redistributions of source code must retain the above copyright notice, this
; list of conditions and the following disclaimer.
;
; 2. Redistributions in binary form must reproduce the above copyright notice,
; this list of conditions and the following disclaimer in the documentation
; and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
; ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
%define private_prefix checkasm
%include "config.asm"
%include "ext/x86/x86inc.asm"
SECTION_RODATA 16
%if ARCH_X86_64
; just random numbers to reduce the chance of incidental match
%if WIN64
x6: dq 0x1a1b2550a612b48c,0x79445c159ce79064
x7: dq 0x2eed899d5a28ddcd,0x86b2536fcd8cf636
x8: dq 0xb0856806085e7943,0x3f2bf84fc0fcca4e
x9: dq 0xacbd382dcf5b8de2,0xd229e1f5b281303f
x10: dq 0x71aeaff20b095fd9,0xab63e2e11fa38ed9
x11: dq 0x89b0c0765892729a,0x77d410d5c42c882d
x12: dq 0xc45ea11a955d8dd5,0x24b3c1d2a024048b
x13: dq 0x2e8ec680de14b47c,0xdd7b8919edd42786
x14: dq 0x135ce6888fa02cbf,0x11e53e2b2ac655ef
x15: dq 0x011ff554472a7a10,0x6de8f4c914c334d5
n7: dq 0x21f86d66c8ca00ce
n8: dq 0x75b6ba21077c48ad
%endif
n9: dq 0xed56bb2dcb3c7736
n10: dq 0x8bda43d3fd1a7e06
n11: dq 0xb64a9c9e5d318408
n12: dq 0xdf9a54b303f1d3a3
n13: dq 0x4a75479abd64e097
n14: dq 0x249214109d5d1c88
%endif
errmsg_reg: db "failed to preserve register", 0
errmsg_stack: db "stack corruption", 0
SECTION .text
cextern fail_func
; max number of args used by any asm function.
; (max_args % 4) must equal 3 for stack alignment
%define max_args 15
%if ARCH_X86_64
;-----------------------------------------------------------------------------
; int checkasm_stack_clobber(uint64_t clobber, ...)
;-----------------------------------------------------------------------------
cglobal stack_clobber, 1, 2
; Clobber the stack with junk below the stack pointer
%define argsize (max_args+6)*8
SUB rsp, argsize
mov r1, argsize-8
.loop:
mov [rsp+r1], r0
sub r1, 8
jge .loop
ADD rsp, argsize
RET
%if WIN64
%assign free_regs 7
%define stack_param rsp+32 ; shadow space
%define num_stack_params rsp+stack_offset+22*8
DECLARE_REG_TMP 4
%else
%assign free_regs 9
%define stack_param rsp
%define num_stack_params rsp+stack_offset+16*8
DECLARE_REG_TMP 7
%endif
;-----------------------------------------------------------------------------
; void checkasm_checked_call(void *func, ...)
;-----------------------------------------------------------------------------
INIT_XMM
cglobal checked_call, 2, 15, 16, max_args*8+64+8
mov t0, r0
; All arguments have been pushed on the stack instead of registers in
; order to test for incorrect assumptions that 32-bit ints are
; zero-extended to 64-bit.
mov r0, r6mp
mov r1, r7mp
mov r2, r8mp
mov r3, r9mp
%if UNIX64
mov r4, r10mp
mov r5, r11mp
%else ; WIN64
; Move possible floating-point arguments to the correct registers
movq m0, r0
movq m1, r1
movq m2, r2
movq m3, r3
%assign i 6
%rep 16-6
mova m %+ i, [x %+ i]
%assign i i+1
%endrep
%endif
; write stack canaries to the area above parameters passed on the stack
mov r9d, [num_stack_params]
mov r8, [rsp+stack_offset] ; return address
not r8
%assign i 0
%rep 8 ; 64 bytes
mov [stack_param+(r9+i)*8], r8
%assign i i+1
%endrep
dec r9d
jl .stack_setup_done ; no stack parameters
.copy_stack_parameter:
mov r8, [stack_param+stack_offset+7*8+r9*8]
mov [stack_param+r9*8], r8
dec r9d
jge .copy_stack_parameter
.stack_setup_done:
%assign i 14
%rep 15-free_regs
mov r %+ i, [n %+ i]
%assign i i-1
%endrep
call t0
; check for failure to preserve registers
xor r14, [n14]
lea r0, [errmsg_reg]
%assign i 13
%rep 14-free_regs
xor r %+ i, [n %+ i]
or r14, r %+ i
%assign i i-1
%endrep
%if WIN64
pxor m6, [x6]
%assign i 7
%rep 16-7
pxor m %+ i, [x %+ i]
por m6, m %+ i
%assign i i+1
%endrep
packsswb m6, m6
movq r5, m6
or r14, r5
%endif
jnz .fail
; check for stack corruption
mov r9d, [num_stack_params]
mov r8, [rsp+stack_offset]
mov r4, [stack_param+r9*8]
not r8
xor r4, r8
%assign i 1
%rep 6
mov r5, [stack_param+(r9+i)*8]
xor r5, r8
or r4, r5
%assign i i+1
%endrep
xor r8, [stack_param+(r9+7)*8]
or r4, r8
jz .ok
add r0, errmsg_stack-errmsg_reg
.fail:
; Call fail_func() with a descriptive message to mark it as a failure.
; Save the return value located in rdx:rax first to prevent clobbering.
mov r9, rax
mov r10, rdx
xor eax, eax
call fail_func
mov rdx, r10
mov rax, r9
.ok:
RET
; trigger a warmup of vector units
%macro WARMUP 0
cglobal warmup, 0, 0
xorps m0, m0
mulps m0, m0
RET
%endmacro
INIT_YMM avx2
WARMUP
INIT_ZMM avx512
WARMUP
%else
; just random numbers to reduce the chance of incidental match
%assign n3 0x6549315c
%assign n4 0xe02f3e23
%assign n5 0xb78d0d1d
%assign n6 0x33627ba7
;-----------------------------------------------------------------------------
; void checkasm_checked_call(void *func, ...)
;-----------------------------------------------------------------------------
cglobal checked_call, 1, 7
mov r3, [esp+stack_offset] ; return address
mov r1, [esp+stack_offset+17*4] ; num_stack_params
mov r2, 27
not r3
sub r2, r1
.push_canary:
push r3
dec r2
jg .push_canary
.push_parameter:
push dword [esp+32*4]
dec r1
jg .push_parameter
mov r3, n3
mov r4, n4
mov r5, n5
mov r6, n6
call r0
; check for failure to preserve registers
xor r3, n3
xor r4, n4
xor r5, n5
xor r6, n6
or r3, r4
or r5, r6
LEA r1, errmsg_reg
or r3, r5
jnz .fail
; check for stack corruption
mov r3, [esp+48*4] ; num_stack_params
mov r6, [esp+31*4] ; return address
mov r4, [esp+r3*4]
sub r3, 26
not r6
xor r4, r6
.check_canary:
mov r5, [esp+(r3+27)*4]
xor r5, r6
or r4, r5
inc r3
jl .check_canary
test r4, r4
jz .ok
add r1, errmsg_stack-errmsg_reg
.fail:
mov r3, eax
mov r4, edx
mov [esp], r1
call fail_func
mov edx, r4
mov eax, r3
.ok:
add esp, 27*4
RET
%endif ; ARCH_X86_64