nrv2d decompressor for PackLinuxElf64amd

src/stub/src/amd64-linux.elf-entry.asm

@@ -62,6 +62,7 @@ PAGE_MASK= (~0<<PAGE_SHIFT)
 PAGE_SIZE= -PAGE_MASK
 
 M_NRV2B_LE32=2  // ../conf.h
+M_NRV2D_LE32=5
 M_NRV2E_LE32=8
 
 
@@ -136,7 +137,7 @@ ra_setup:
 #define getnextbp(reg) call *%r11; adcl reg,reg
 #define getnextb(reg)  getnextbp(reg)
 
-        .p2align 3
+
 getbit:
         addl bits,bits; jz refill  // Carry= next bit
         rep; ret
@@ -169,6 +170,9 @@ setup:
   section NRV2E
 #include "arch/amd64/nrv2e_d.S"
 
+  section NRV2D
+#include "arch/amd64/nrv2d_d.S"
+
   section NRV2B
 #include "arch/amd64/nrv2b_d.S"
 

src/stub/src/arch/amd64/nrv2b_d.S

@@ -30,7 +30,7 @@
 */
 
         cmpb $ M_NRV2B_LE32,methb; je top_n2b; jmp not_n2b
-        .p2align 3
+
 lit_n2b:
         incq %rsi; movb %dl,(%rdi)
         incq %rdi

src/stub/src/arch/amd64/nrv2d_d.S

@@ -0,0 +1,78 @@
+/* nrv2d_d.S -- AMD64 decompressor for NRV2D
+
+   This file is part of the UPX executable compressor.
+
+   Copyright (C) 1996-2006 Markus Franz Xaver Johannes Oberhumer
+   Copyright (C) 1996-2006 Laszlo Molnar
+   Copyright (C) 2000-2006 John F. Reiser
+   All Rights Reserved.
+
+   UPX and the UCL library are free software; you can redistribute them
+   and/or modify them 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.
+
+   This program 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; see the file COPYING.
+   If not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+   Markus F.X.J. Oberhumer              Laszlo Molnar
+   <mfx@users.sourceforge.net>          <ml1050@users.sourceforge.net>
+
+   John F. Reiser
+   <jreiser@users.sourceforge.net>
+*/
+
+        cmpb $ M_NRV2D_LE32,methb; je top_n2d; jmp not_n2d
+
+lit_n2d:
+        incq %rsi; movb %dl,(%rdi)
+        incq %rdi
+top_n2d:
+        movb (%rsi),%dl  // speculate: literal, or bottom 8 bits of offset
+        jnextb1yp lit_n2d
+        lea 1(lenq),off  // [len= 0] off= 1
+        jmp getoff_n2d
+
+off_n2d:
+        dec off
+        getnextbp(off)
+getoff_n2d:
+        getnextbp(off)
+        jnextb0np off_n2d
+
+        subl $ 3,off; jc offprev_n2d
+        shll $ 8,off; movzbl %dl,%edx
+        orl %edx,off; incq %rsi
+        xorl $~0,off; jz eof
+        sarl     off  // Carry= original low bit
+        movslq   off,disp  // XXX: 2GB
+        jmp len_n2d-2  // CHEAT: assume tail of getnextb is "adcl len,len"
+offprev_n2d:
+        getnextb(len)
+len_n2d:
+        getnextb(len); jne gotlen_n2d
+        inc len  // len= 1
+lenmore_n2d:
+        getnextb(len)
+        jnextb0n lenmore_n2d
+        addl $2,len
+gotlen_n2d:
+        cmpq $-0x500,disp
+        adcl $1,len  // len += 1+ (disp < -0x500);
+        call copy
+bot_n2d:  // In: 0==len
+        jmp top_n2d
+
+not_n2d:
+
+/*
+vi:ts=8:et:nowrap
+*/
+

src/stub/src/arch/amd64/nrv2e_d.S

@@ -1,4 +1,4 @@
-/* amd_d_nrv2e.S -- AMD64 decompressor for NRV2E
+/* nrv2e_d.S -- AMD64 decompressor for NRV2E
 
    This file is part of the UPX executable compressor.
 
@@ -30,7 +30,7 @@
 */
 
         cmpb $ M_NRV2E_LE32,methb; je top_n2e; jmp not_n2e
-        .p2align 3
+
 lit_n2e:
         incq %rsi; movb %dl,(%rdi)
         incq %rdi