John Reiser
2a128fe772
renamed: stub/src/arch/arm64/v8/nrv2b_d8.S -> stub/src/arch/arm64/v8/nrv2b_d32.S renamed: stub/src/arch/arm64/v8/nrv2d_d8.S -> stub/src/arch/arm64/v8/nrv2d_d32.S modified: stub/src/arch/arm64/v8/nrv2e_d32.S deleted: stub/src/arch/arm64/v8/nrv2e_d8.S modified: stub/src/arm64-darwin.macho-entry.S modified: stub/src/arm64-linux.elf-entry.S modified: stub/src/arm64-linux.elf-fold.S modified: stub/src/arm64-linux.shlib-init.S modified: stub/arm64-darwin.macho-entry.h modified: stub/arm64-linux.elf-entry.h modified: stub/arm64-linux.elf-fold.h modified: stub/arm64-linux.shlib-init.h modified: stub/tmp/arm64-darwin.macho-entry.bin.dump modified: stub/tmp/arm64-linux.elf-entry.bin.dump modified: stub/tmp/arm64-linux.elf-fold.map modified: stub/tmp/arm64-linux.shlib-init.bin.dump
251 lines
7.0 KiB
ArmAsm
251 lines
7.0 KiB
ArmAsm
/* aarch64-linux.elf-entry.S -- Linux program entry point & decompressor (Elf binary)
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*
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* This file is part of the UPX executable compressor.
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*
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* Copyright (C) 1996-2015 Markus Franz Xaver Johannes Oberhumer
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* Copyright (C) 1996-2015 Laszlo Molnar
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* Copyright (C) 2000-2015 John F. Reiser
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* All Rights Reserved.
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*
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* UPX and the UCL library are free software; you can redistribute them
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* and/or modify them under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program 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; see the file COPYING.
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* If not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Markus F.X.J. Oberhumer Laszlo Molnar
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* <markus@oberhumer.com> <ml1050@users.sourceforge.net>
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*
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* John F. Reiser
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* <jreiser@users.sourceforge.net>
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*/
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#include "arch/arm64/v8/macros.S"
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sz_Elf64_Ehdr= 64
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sz_Elf64_Phdr= 56
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sz_b_info= 12
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sz_unc= 0
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sz_cpr= 4
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b_method= 8
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sz_l_info= 12
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sz_p_info= 12
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PROT_READ= 1
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PROT_WRITE= 2
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PROT_EXEC= 4
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MAP_FIXED= 0x10
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PAGE_SHIFT= 12
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PAGE_SIZE = -(~0<<PAGE_SHIFT)
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__NR_exit = 93
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__NR_write = 64
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__NR_mmap64 = 222
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__ARM_NR_cacheflush = 255 // FIXME
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#ifndef DEBUG /*{*/
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#define DEBUG 0
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#endif /*}*/
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//.long sz_pack2 // placed there by ::pack3()
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section ELFMAINX
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start_params:
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.long LENF // end_decompress - (start_params -4)
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.long CPR0 // cpr0 - (start_params -4)
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mflg:
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.long MFLG // MAP_{PRIVATE|ANONYMOUS} // QNX vs linux
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.xword ADRM // dst for map
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_start: .globl _start
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brk #0
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/* Get some pages: enough
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to duplicate the entire compressed PT_LOAD, plus 1 page, located just after
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the brk() of the _un_compressed program. The address is pre-calculated
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calculated by PackLinuxElf64arm::addLinkerSymbols().
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*/
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#if DEBUG /*{*/
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#define TRACE_REGS r0-r12,r14,r15
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// sp (r13) is not included because the write-back might cause UNDEFINED behavior
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// if the write-back register is not first or last. The actual value of sp
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// usually does not matter. Just remember that lr (r14) and pc (r15) are stored
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// one word closer to the stack pointer because r13 has been omitted.
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stmdb sp!,{TRACE_REGS}; mov r0,#1; bl trace
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#endif /*}*/
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adr x12,start_params -4 // &sz_pack2
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ldp w1,w10,[x12] // w1= sz_pack2; w10= LENF
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ldp w11,w13,[x12,#2*4] // w11= CPRO; w13= MFLG
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add x11,x11,x12 // cpr0
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add x10,x10,x12 // end_decompress
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ldr w3,[x11,# sz_unc]
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sub x9,x12,x1 // &our_Elf64_Ehdr
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add w1,w1,w3 // sz_pack2 + cpr0.sz_unc
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ldr x0,[x12,#4*4] // ADRM
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add x1,x1,# PAGE_SIZE
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section LUNMP000
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mov w3,#0<<12 // 0-page crumb
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section LUNMP001
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mov w3,#1<<12 // 1-page crumb
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section ELFMAINXu
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PUSH5(x0,x1,x2,x3,x13) // ADRU, LENU, space for sz_unc, crumb, MFLG
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SP_MFLG= 4*8
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D_sz_unc=2*8 // stack displacement to sz_unc
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mov w2,#PROT_READ | PROT_WRITE | PROT_EXEC
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orr w3,w13,#MAP_FIXED // MFLG: MAP_{PRIVATE|ANON}
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mov x5,#0 // offset= 0
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mov w4,#-1 // fd= -1; cater to *BSD for fd when MAP_ANON
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do_sys __NR_mmap64
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#if DEBUG /*{*/
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stmdb sp!,{TRACE_REGS}; mov r0,#2; bl trace
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#endif /*}*/
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cmn x0,#4096
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bcs msg_SELinux
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copy_cl:
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add x5,x0,#64; dc zva,x5 // clear FOLLOWING 64-byte line
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ldp x1,x2,[x9],#2*8
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ldp x3,x4,[x9],#2*8
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stp x1,x2,[x0],#2*8
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stp x3,x4,[x0],#2*8
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ldp x1,x2,[x9],#2*8
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ldp x3,x4,[x9],#2*8
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stp x1,x2,[x0],#2*8
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stp x3,x4,[x0],#2*8
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cmp x9,x10
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sub x5,x9,#64; dc cvau,x5 // clean 64-byte line
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blo copy_cl // all source lines
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sub x4,x0,x9 // relocation amount
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ldr w1,[sp,#SP_MFLG]
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adr x5,f_decompress
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str w1,[x0],#4 // MFLG at -4+ fold_begin
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mov lr,x0 // dst for unfolded code
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add x5,x5,x4 // relocated f_decompress
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ldr w9,[x12] // sz_pack2
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sub w9,w9,#sz_Elf64_Ehdr + 2*sz_Elf64_Phdr + sz_l_info + sz_p_info
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sub x10,x12,x9 // &b_info
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add x10,x10,x4 // relocated &b_info
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ldr w4,[x11,# b_method ] // 5th param (whole word: endian issues!)
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PUSH1(lr) // dst for unfolded
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D_stm1=2*8
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ldr w3,[x11,# sz_unc]
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add x0, x11,# sz_b_info
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ldr w1,[x11,# sz_cpr ]
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mov x2,lr // dst
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str w3,[sp,#D_stm1 + D_sz_unc] // sz_unc; lzma needs for EOF
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add x3, sp,#D_stm1 + D_sz_unc // &sz_unc
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#if DEBUG /*{*/
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stmdb sp!,{TRACE_REGS}; mov r0,#3; bl trace
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#endif /*}*/
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brk #0
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blr x5 // decompress folded code
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POP1(lr) // load retaddr
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ret // goto unfolded
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#if DEBUG /*{*/
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TRACE_BUFLEN=512
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trace:
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str lr,[sp,#(-1+ 15)*4] @ return pc; [remember: sp is not stored]
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mov r4,sp @ &saved_r0
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sub sp,sp,#TRACE_BUFLEN
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mov r2,sp @ output string
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mov r1,#'\n'; bl trace_hex @ In: r0 as label
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mov r1,#'>'; strb r1,[r2],#1
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mov r5,#3 @ rows to print
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L600: @ each row
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sub r0,r4,#TRACE_BUFLEN
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sub r0,r0,sp
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mov r0,r0,lsr #2; mov r1,#'\n'; bl trace_hex @ which block of 8
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mov r6,#8 @ words per row
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L610: @ each word
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ldr r0,[r4],#4; mov r1,#' '; bl trace_hex @ next word
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subs r6,r6,#1; bgt L610
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subs r5,r5,#1; bgt L600
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mov r0,#'\n'; strb r0,[r2],#1
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sub r2,r2,sp @ count
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mov r1,sp @ buf
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mov r0,#2 @ FD_STDERR
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do_sys __NR_write
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add sp,sp,#TRACE_BUFLEN
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ldmia sp!,{TRACE_REGS}
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trace_hex: // In: r0=val, r1=punctuation before, r2=ptr; Uses: r3, ip
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strb r1,[r2],#1 @ punctuation
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mov r3,#4*(8 -1) @ shift count
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adr ip,hex
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L620:
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mov r1,r0,lsr r3
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and r1,r1,#0xf
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ldrb r1,[ip, r1]
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strb r1,[r2],#1
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subs r3,r3,#4; bge L620
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ret
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hex:
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.ascii "0123456789abcdef"
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#endif /*}*/
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f_decompress:
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#define LINUX_ARM_CACHEFLUSH 1
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section NRV_HEAD
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// empty
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section NRV_TAIL
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// empty
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section NRV2E
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#include "arch/arm64/v8/nrv2e_d32.S"
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section NRV2D
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#include "arch/arm64/v8/nrv2d_d32.S"
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section NRV2B
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#include "arch/arm64/v8/nrv2b_d32.S"
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#include "arch/arm64/v8/lzma_d.S"
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section ELFMAINY
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end_decompress: .globl end_decompress
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msg_SELinux:
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mov w2,#L71 - L70 // length
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adr x1,L70 // message text
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mov w0,#2 // fd stderr
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do_sys __NR_write
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die:
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mov w0,#127
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do_sys __NR_exit
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L70:
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.asciz "PROT_EXEC|PROT_WRITE failed.\n"
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L71:
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/* IDENTSTR goes here */
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section ELFMAINZ
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cpr0: .globl cpr0
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/* { b_info={sz_unc, sz_cpr, {4 char}}, folded_loader...} */
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/*
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vi:ts=8:et:nowrap
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*/
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