Support for 64-bit AMD x86_64

Makefile Added Files: a_lx_elf64.c amd_bxx.S amd_d_nrv2e.S amd_regs.h fold_elf64amd.S l_lx_elf64amd.S l_lx_elf64amd.lds committer: jreiser <jreiser> 1131566835 +0000
2005-11-09 20:07:15 +00:00
parent 414a6c1c9e
commit 023c06e178
8 changed files with 907 additions and 0 deletions
@@ -0,0 +1,124 @@
+/*  fold_elf64amd.S -- linkage to C code to process Elf binary
+*
+*  This file is part of the UPX executable compressor.
+*
+*  Copyright (C) 2000-2005 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>
+*/
+#include "amd_regs.h"
+
+PAGE_SHIFT= 12
+PAGE_MASK= 0xffffffffffffffff<<PAGE_SHIFT
+
+sz_b_info= 12
+  sz_unc= 0
+  sz_cpr= 4
+
+sz_l_info= 12
+sz_p_info= 12
+
+OVERHEAD=2048
+MAX_ELF_HDR=1024
+
+__NR_munmap=  91
+
+/* In:
+    %rbp= &decompress; also 9+ (char *)&(offset to {l_info; p_info; b_info})
+    %rsp= &{argc,argv...,0,env...,0,auxv...,strings}
+*/
+fold_begin:  
+        call L90  # ret_addr is &f_unfilter
+#include "amd_bxx.S"
+
+zfind:
+        lodsq; testq %rax,%rax; jnz zfind
+        ret
+L90:
+        pop %arg6  # &amdbxx: f_unfilter
+        movq %rsp,%rsi  # stack pointer at execve
+        call zfind  # %rsi= &env
+        call zfind  # %rsi= &Elf64_auxv
+        subq $ OVERHEAD,%rsp
+        movq %rsp,%arg3  # &ELf64_Ehdr temporary space
+        push %rsi  # arg7
+        movq $ PAGE_MASK,%rcx  # sign extend 32 bits to 64 bits
+        movl -9(%rbp),%arg2l  # total size - offset to {l_info; p_info; b_info}
+        movq %arg6,%r15; andq %rcx,%r15  # %r15= &this_page
+        movq %rbp,%arg5  # &decompress: f_expand
+        movq %rbp,%arg1; subq %arg2,%arg1  # &l_info
+        movq %arg1,%r14; andq %rcx,%r14  # %r14= our_Elf64_Ehdr
+        movl sz_unc+sz_p_info+sz_l_info(%arg1),%arg4l  # sz_elf_headers
+        call upx_main  # Out: %rax= entry
+/* entry= upx_main(l_info *arg1, total_size arg2, Elf64_Ehdr *arg3, sz_ehdr arg4,
+        f_decompr arg5, f_unfilter arg6, Elf32_Auxv_t *arg7 )
+*/
+        addq $8+OVERHEAD,%rsp
+        push %rax  # save &entry
+        movq %r14,%arg1  # &our_Elf64_Ehdr
+        movq %r15,%arg2
+        subq %r14,%arg2  # size
+        call munmap  # unmap compressed program; /proc/self/exe disappears
+        ret
+
+/* 64-bit mode only! */
+__NR_read=  0
+__NR_open=  2
+__NR_close= 3
+
+__NR_mmap=      9
+__NR_mprotect= 10
+__NR_munmap=   11
+__NR_brk=      12
+
+__NR_exit= 60
+
+mmap: .globl mmap
+        movq %arg4,%sys4
+        movb $ __NR_mmap,%al
+sysgo:  # NOTE: kernel demands 4th arg in %sys4, NOT %arg4
+        movzbl %al,%eax
+        syscall
+        cmpq $ PAGE_MASK,%rax; jc no_fail
+        orq $~0,%rax  # failure; IGNORE errno
+no_fail:
+        ret
+
+read: .globl read
+        movb $ __NR_read,%al; jmp sysgo
+open: .globl open
+        movb $ __NR_open,%al; jmp sysgo
+close: .globl close
+        movb $ __NR_close,%al; jmp sysgo
+
+mprotect: .globl mprotect
+        movb $ __NR_mprotect,%al; jmp sysgo
+munmap: .globl munmap
+        movb $ __NR_munmap,%al; jmp sysgo
+brk: .globl brk
+        movb $ __NR_brk,%al; jmp sysgo
+
+exit: .globl exit
+        movb $ __NR_exit,%al; jmp sysgo
+
+# vi:ts=8:et:nowrap