| ;; -------------------------------------------------------------------------- |
| ;; |
| ;; Copyright 1996-2017 The NASM Authors - All Rights Reserved |
| ;; See the file AUTHORS included with the NASM distribution for |
| ;; the specific copyright holders. |
| ;; |
| ;; Redistribution and use in source and binary forms, with or without |
| ;; modification, are permitted provided that the following |
| ;; conditions are met: |
| ;; |
| ;; * Redistributions of source code must retain the above copyright |
| ;; notice, this list of conditions and the following disclaimer. |
| ;; * 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 (INCLUDING NEGLIGENCE OR |
| ;; OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| ;; EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| ;; |
| ;; -------------------------------------------------------------------------- |
| |
| ; |
| ; Smart alignment macros |
| ; |
| USE: smartalign |
| |
| %imacro alignmode 1-2.nolist |
| %ifidni %1,nop |
| %define __ALIGN_JMP_THRESHOLD__ 16 |
| |
| %define __ALIGN_16BIT_1B__ 0x90 |
| %define __ALIGN_16BIT_GROUP__ 1 |
| |
| %define __ALIGN_32BIT_1B__ 0x90 |
| %define __ALIGN_32BIT_GROUP__ 1 |
| |
| %define __ALIGN_64BIT_1B__ 0x90 |
| %define __ALIGN_64BIT_GROUP__ 1 |
| %elifidni %1,generic |
| %define __ALIGN_JMP_THRESHOLD__ 8 |
| |
| %define __ALIGN_16BIT_1B__ 0x90 |
| %define __ALIGN_16BIT_2B__ 0x89,0xf6 |
| %define __ALIGN_16BIT_3B__ 0x8d,0x74,0x00 |
| %define __ALIGN_16BIT_4B__ 0x8d,0xb4,0x00,0x00 |
| %define __ALIGN_16BIT_5B__ 0x8d,0xb4,0x00,0x00,0x90 |
| %define __ALIGN_16BIT_6B__ 0x8d,0xb4,0x00,0x00,0x89,0xff |
| %define __ALIGN_16BIT_7B__ 0x8d,0xb4,0x00,0x00,0x8d,0x7d,0x00 |
| %define __ALIGN_16BIT_8B__ 0x8d,0xb4,0x00,0x00,0x8d,0xbd,0x00,0x00 |
| %define __ALIGN_16BIT_GROUP__ 8 |
| |
| %define __ALIGN_32BIT_1B__ 0x90 |
| %define __ALIGN_32BIT_2B__ 0x89,0xf6 |
| %define __ALIGN_32BIT_3B__ 0x8d,0x76,0x00 |
| %define __ALIGN_32BIT_4B__ 0x8d,0x74,0x26,0x00 |
| %define __ALIGN_32BIT_5B__ 0x90,0x8d,0x74,0x26,0x00 |
| %define __ALIGN_32BIT_6B__ 0x8d,0xb6,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_7B__ 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_GROUP__ 7 |
| |
| %define __ALIGN_64BIT_1B__ 0x90 |
| %define __ALIGN_64BIT_2B__ 0x66,0x90 |
| %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_64BIT_GROUP__ 4 |
| %elifidni %1,k8 |
| %define __ALIGN_JMP_THRESHOLD__ 16 |
| |
| %define __ALIGN_16BIT_1B__ 0x90 |
| %define __ALIGN_16BIT_2B__ 0x66,0x90 |
| %define __ALIGN_16BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_16BIT_GROUP__ 4 |
| |
| %define __ALIGN_32BIT_1B__ 0x90 |
| %define __ALIGN_32BIT_2B__ 0x66,0x90 |
| %define __ALIGN_32BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_32BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_32BIT_GROUP__ 4 |
| |
| %define __ALIGN_64BIT_1B__ 0x90 |
| %define __ALIGN_64BIT_2B__ 0x66,0x90 |
| %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_64BIT_GROUP__ 4 |
| %elifidni %1,k7 |
| %define __ALIGN_JMP_THRESHOLD__ 16 |
| |
| %define __ALIGN_16BIT_1B__ 0x90 |
| %define __ALIGN_16BIT_2B__ 0x66,0x90 |
| %define __ALIGN_16BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_64BIT_GROUP__ 4 |
| |
| %define __ALIGN_32BIT_1B__ 0x90 |
| %define __ALIGN_32BIT_2B__ 0x8b,0xc0 |
| %define __ALIGN_32BIT_3B__ 0x8d,0x04,0x20 |
| %define __ALIGN_32BIT_4B__ 0x8d,0x44,0x20,0x00 |
| %define __ALIGN_32BIT_5B__ 0x8d,0x44,0x20,0x00,0x90 |
| %define __ALIGN_32BIT_6B__ 0x8d,0x80,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_7B__ 0x8d,0x04,0x05,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_GROUP__ 7 |
| |
| %define __ALIGN_64BIT_1B__ 0x90 |
| %define __ALIGN_64BIT_2B__ 0x66,0x90 |
| %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90 |
| %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90 |
| %define __ALIGN_64BIT_GROUP__ 4 |
| %elifidni %1,p6 |
| %define __ALIGN_JMP_THRESHOLD__ 16 |
| |
| %define __ALIGN_16BIT_1B__ 0x90 |
| %define __ALIGN_16BIT_2B__ 0x66,0x90 |
| %define __ALIGN_16BIT_3B__ 0x0f,0x1f,0x00 |
| %define __ALIGN_16BIT_4B__ 0x0f,0x1f,0x40,0x00 |
| %define __ALIGN_16BIT_GROUP__ 4 |
| |
| %define __ALIGN_32BIT_1B__ 0x90 |
| %define __ALIGN_32BIT_2B__ 0x66,0x90 |
| %define __ALIGN_32BIT_3B__ 0x0f,0x1f,0x00 |
| %define __ALIGN_32BIT_4B__ 0x0f,0x1f,0x40,0x00 |
| %define __ALIGN_32BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00 |
| %define __ALIGN_32BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00 |
| %define __ALIGN_32BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00 |
| %define __ALIGN_32BIT_GROUP__ 8 |
| |
| %define __ALIGN_64BIT_1B__ 0x90 |
| %define __ALIGN_64BIT_2B__ 0x66,0x90 |
| %define __ALIGN_64BIT_3B__ 0x0f,0x1f,0x00 |
| %define __ALIGN_64BIT_4B__ 0x0f,0x1f,0x40,0x00 |
| %define __ALIGN_64BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00 |
| %define __ALIGN_64BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00 |
| %define __ALIGN_64BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00 |
| %define __ALIGN_64BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00 |
| %define __ALIGN_64BIT_GROUP__ 8 |
| %else |
| %error unknown alignment mode: %1 |
| %endif |
| %ifnempty %2 |
| %ifidni %2,nojmp |
| %xdefine __ALIGN_JMP_THRESHOLD__ -1 |
| %else |
| %xdefine __ALIGN_JMP_THRESHOLD__ %2 |
| %endif |
| %endif |
| %xdefine __ALIGNMODE__ %1,__ALIGN_JMP_THRESHOLD__ |
| %endmacro |
| |
| %unimacro align 1-2+.nolist |
| %imacro align 1-2+.nolist |
| sectalign %1 ; align a segment as well |
| %ifnempty %2 |
| times (((%1) - (($-$$) % (%1))) % (%1)) %2 |
| %elif __PASS__ == 0 || __PASS__ == 3 |
| times (((%1) - (($-$$) % (%1))) % (%1)) nop |
| %else |
| %push |
| %assign %$pad (((%1) - (($-$$) % (%1))) % (%1)) |
| %if __ALIGN_JMP_THRESHOLD__ != -1 && %$pad > __ALIGN_JMP_THRESHOLD__ |
| jmp %$end |
| ; We can't re-use %$pad here as $ will have changed! |
| times (((%1) - (($-$$) % (%1))) % (%1)) nop |
| %else |
| times (%$pad / __ALIGN_%[__BITS__]BIT_GROUP__) \ |
| db __ALIGN_%[__BITS__]BIT_%[__ALIGN_%[__BITS__]BIT_GROUP__]B__ |
| %assign %$pad %$pad % __ALIGN_%[__BITS__]BIT_GROUP__ |
| %if %$pad > 0 |
| db __ALIGN_%[__BITS__]BIT_%[%$pad]B__ |
| %endif |
| %endif |
| %$end: |
| %pop |
| %endif |
| %endmacro |
| |
| alignmode generic |
