mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
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d39c229e54
Some debuggers/profilers use this metadata to determine which function a given instruction is in; without it they get can confused by local labels (if you haven't stripped those). On the other hand, some tools are still confused even with this metadata. e.g. this fixes `gdb`, but not `perf`. Currently only implemented for ELF.
244 lines
5.9 KiB
NASM
244 lines
5.9 KiB
NASM
;*****************************************************************************
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;* Assembly testing and benchmarking tool
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;* Copyright (c) 2008 Loren Merritt
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;* Copyright (c) 2012 Henrik Gramner
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;*
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;* This file is part of FFmpeg.
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;*
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;* FFmpeg is free software; you can redistribute it and/or modify
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;* it under the terms of the GNU General Public License as published by
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;* the Free Software Foundation; either version 2 of the License, or
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;* (at your option) any later version.
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;*
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;* FFmpeg is distributed in the hope that it will be useful,
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;* but WITHOUT ANY WARRANTY; without even the implied warranty of
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;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;* GNU General Public License for more details.
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;*
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;* You should have received a copy of the GNU General Public License
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;* along with this program; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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;*****************************************************************************
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%define private_prefix checkasm
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%include "libavutil/x86/x86inc.asm"
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SECTION_RODATA
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error_message: db "failed to preserve register", 0
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error_message_emms: db "failed to issue emms", 0
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%if ARCH_X86_64
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; just random numbers to reduce the chance of incidental match
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ALIGN 16
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x6: dq 0x1a1b2550a612b48c,0x79445c159ce79064
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x7: dq 0x2eed899d5a28ddcd,0x86b2536fcd8cf636
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x8: dq 0xb0856806085e7943,0x3f2bf84fc0fcca4e
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x9: dq 0xacbd382dcf5b8de2,0xd229e1f5b281303f
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x10: dq 0x71aeaff20b095fd9,0xab63e2e11fa38ed9
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x11: dq 0x89b0c0765892729a,0x77d410d5c42c882d
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x12: dq 0xc45ea11a955d8dd5,0x24b3c1d2a024048b
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x13: dq 0x2e8ec680de14b47c,0xdd7b8919edd42786
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x14: dq 0x135ce6888fa02cbf,0x11e53e2b2ac655ef
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x15: dq 0x011ff554472a7a10,0x6de8f4c914c334d5
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n7: dq 0x21f86d66c8ca00ce
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n8: dq 0x75b6ba21077c48ad
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n9: dq 0xed56bb2dcb3c7736
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n10: dq 0x8bda43d3fd1a7e06
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n11: dq 0xb64a9c9e5d318408
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n12: dq 0xdf9a54b303f1d3a3
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n13: dq 0x4a75479abd64e097
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n14: dq 0x249214109d5d1c88
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%endif
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SECTION .text
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cextern fail_func
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; max number of args used by any asm function.
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; (max_args % 4) must equal 3 for stack alignment
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%define max_args 15
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%if ARCH_X86_64
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;-----------------------------------------------------------------------------
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; int checkasm_stack_clobber(uint64_t clobber, ...)
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;-----------------------------------------------------------------------------
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cglobal stack_clobber, 1,2
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; Clobber the stack with junk below the stack pointer
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%define argsize (max_args+6)*8
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SUB rsp, argsize
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mov r1, argsize-8
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.loop:
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mov [rsp+r1], r0
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sub r1, 8
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jge .loop
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ADD rsp, argsize
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RET
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%if WIN64
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%assign free_regs 7
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DECLARE_REG_TMP 4
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%else
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%assign free_regs 9
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DECLARE_REG_TMP 7
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%endif
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%macro report_fail 1
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mov r9, rax
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mov r10, rdx
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lea r0, [%1]
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xor eax, eax
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call fail_func
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mov rdx, r10
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mov rax, r9
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%endmacro
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;-----------------------------------------------------------------------------
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; void checkasm_checked_call(void *func, ...)
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;-----------------------------------------------------------------------------
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INIT_XMM
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%macro CHECKED_CALL 0-1
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cglobal checked_call%1, 2,15,16,max_args*8+8
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mov t0, r0
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; All arguments have been pushed on the stack instead of registers in order to
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; test for incorrect assumptions that 32-bit ints are zero-extended to 64-bit.
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mov r0, r6mp
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mov r1, r7mp
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mov r2, r8mp
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mov r3, r9mp
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%if UNIX64
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mov r4, r10mp
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mov r5, r11mp
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%assign i 6
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%rep max_args-6
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mov r9, [rsp+stack_offset+(i+1)*8]
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mov [rsp+(i-6)*8], r9
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%assign i i+1
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%endrep
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%else ; WIN64
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%assign i 4
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%rep max_args-4
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mov r9, [rsp+stack_offset+(i+7)*8]
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mov [rsp+i*8], r9
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%assign i i+1
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%endrep
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; Move possible floating-point arguments to the correct registers
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movq m0, r0
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movq m1, r1
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movq m2, r2
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movq m3, r3
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%assign i 6
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%rep 16-6
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mova m %+ i, [x %+ i]
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%assign i i+1
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%endrep
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%endif
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%assign i 14
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%rep 15-free_regs
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mov r %+ i, [n %+ i]
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%assign i i-1
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%endrep
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call t0
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%assign i 14
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%rep 15-free_regs
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xor r %+ i, [n %+ i]
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or r14, r %+ i
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%assign i i-1
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%endrep
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%if WIN64
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%assign i 6
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%rep 16-6
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pxor m %+ i, [x %+ i]
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por m6, m %+ i
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%assign i i+1
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%endrep
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packsswb m6, m6
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movq r5, m6
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or r14, r5
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%endif
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; Call fail_func() with a descriptive message to mark it as a failure
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; if the called function didn't preserve all callee-saved registers.
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; Save the return value located in rdx:rax first to prevent clobbering.
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jz .clobber_ok
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report_fail error_message
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.clobber_ok:
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%ifnid %1, _emms
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fstenv [rsp]
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cmp word [rsp + 8], 0xffff
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je .emms_ok
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report_fail error_message_emms
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emms
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.emms_ok:
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%else
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emms
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%endif
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RET
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%endmacro
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%else
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; just random numbers to reduce the chance of incidental match
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%define n3 dword 0x6549315c
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%define n4 dword 0xe02f3e23
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%define n5 dword 0xb78d0d1d
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%define n6 dword 0x33627ba7
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%macro report_fail 1
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mov r3, eax
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mov r4, edx
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lea r0, [%1]
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mov [esp], r0
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call fail_func
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mov edx, r4
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mov eax, r3
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%endmacro
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%macro CHECKED_CALL 0-1
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;-----------------------------------------------------------------------------
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; void checkasm_checked_call(void *func, ...)
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;-----------------------------------------------------------------------------
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cglobal checked_call%1, 1,7
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mov r3, n3
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mov r4, n4
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mov r5, n5
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mov r6, n6
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%rep max_args
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PUSH dword [esp+20+max_args*4]
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%endrep
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call r0
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xor r3, n3
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xor r4, n4
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xor r5, n5
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xor r6, n6
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or r3, r4
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or r5, r6
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or r3, r5
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jz .clobber_ok
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report_fail error_message
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.clobber_ok:
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%ifnid %1, _emms
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fstenv [esp]
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cmp word [esp + 8], 0xffff
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je .emms_ok
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report_fail error_message_emms
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emms
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.emms_ok:
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%else
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emms
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%endif
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add esp, max_args*4
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REP_RET
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%endmacro
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%endif ; ARCH_X86_64
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CHECKED_CALL
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CHECKED_CALL _emms
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