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https://github.com/upx/upx
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hacking UPX_F_LINUX_ELF32_MIPSEL
This commit is contained in:
John Reiser
parent
573009eeb6
commit
10a6370738
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@ -837,12 +837,12 @@ mipsel.r3000-linux.elf%.h : tc_bfdname = elf32-littlemips
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mipsel.r3000-linux.elf-entry.h : $(srcdir)/src/$$T.S
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ifeq (1,1)
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# info: we really need as-2.17 here
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$(call tc,pp-as) -DPS1 $< -o - | $(RTRIM) > tmp/$T.i
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$(call tc,pp-as) $< -o - | $(RTRIM) > tmp/$T.i
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$(call tc,as) tmp/$T.i -o tmp/$T.bin
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$(call tc,gpp_mkdep) --mode=c --MMD=$@ $< --MF=tmp/$T.d
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else
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# info: as-2.16.1 as used by gcc-4.1.1 does _not_ work
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$(call tc,gcc) -c -DPS1 -Wa,-O,-mno-pdr $< -o tmp/$T.bin
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$(call tc,gcc) -c -Wa,-O,-mno-pdr $< -o tmp/$T.bin
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endif
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$(call tc,f-embed_objinfo,tmp/$T.bin)
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$(call tc,bin2h-c) tmp/$T.bin $@
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File diff suppressed because it is too large
Load Diff
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@ -59,11 +59,7 @@ PROT_EXEC= 4
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MAP_PRIVATE= 2
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MAP_FIXED= 0x10
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MAP_ANONYMOUS= 0x1000
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PAGE_SHIFT= 12
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PAGE_MASK= (~0<<PAGE_SHIFT)
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PAGE_SIZE= -PAGE_MASK
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MAP_ANONYMOUS= 0x800
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M_NRV2B_LE32=2 // ../conf.h
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M_NRV2D_LE32=5
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@ -82,6 +78,7 @@ lenu: .long LENU
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adrx: .long ADRX
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lenx: .long LENX
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_start: .globl _start
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break
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bal main
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addiu s7,ra, decompressor - 0f // s7= &decompress
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0:
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@ -123,44 +120,46 @@ LZMA_BASE_NUM = 1846
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LZMA_LIT_NUM = 768
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lxlzma_szframe = 12*4
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lxlzma_oldsp = 11*4
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lxlzma_origdst = 10*4
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lxlzma_origsrc = 9*4
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lxlzma_sv_pc = 11*4
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lxlzma_sv_sp = 10*4
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/* 9 */
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lxlzma_dstdone = 8*4
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lxlzma_srcdone = 7*4
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lxlzma_pdstdone = 6*4
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lxlzma_dstlen = 5*4
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lxlzma_dst = 4*4
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lbu t0,0(lxsrc) # ((lit_context_bits + lit_pos_bits)<<3) | pos_bits
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li tmp,-2*LZMA_LIT_NUM
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lbu t1,1(lxsrc) # (lit_pos_bits<<4) | lit_context_bits
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andi v0,t0,7 # pos_bits
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srl t0,t0,3 # (lit_context_bits + lit_pos_bits)
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li tmp,-2*LZMA_LIT_NUM
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sllv tmp,tmp,t0
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addiu tmp,tmp,-4 - 2*LZMA_BASE_NUM - lxlzma_szframe
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addu sp,sp,tmp
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sw tmp, lxlzma_oldsp(sp) # dynamic frame size
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addu sp,sp,tmp # alloca
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sw tmp, lxlzma_sv_sp(sp) # dynamic frame size
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addiu tmp,sp,lxlzma_dstdone
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sw tmp, lxlzma_pdstdone(sp)
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sw lxdstlen,lxlzma_dstlen(sp)
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sw lxdst, lxlzma_dst(sp)
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addiu a3,sp,lxlzma_srcdone
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move a2,lxsrclen
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addiu a1,lxsrc,2
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sw ra,lxlzma_sv_pc(sp)
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addiu a2,lxsrclen,-2 # 2 header bytes
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sw tmp, lxlzma_pdstdone(sp)
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addiu a1,lxsrc,2 # 2 header bytes
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addiu a0,sp,lxlzma_szframe # &CLzamDecoderState
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sb v0,2(a0) # pos_bits
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andi tmp,t1,0xf
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sb tmp,0(a0) # lit_context_bits
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srl t1,t1,4
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sb t1,1(a0) # lit_pos_bits
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jalr s7
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lw tmp, lxlzma_oldsp(sp)
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lw lxdst, lxlzma_origdst(sp)
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lw lxdstlen,lxlzma_dstdone(sp)
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subu sp,tmp
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bal lzma_decode
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sb t1,1(a0) # lit_pos_bits
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lw ra,lxlzma_sv_pc(sp)
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lw tmp,lxlzma_sv_sp(sp)
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jr ra
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subu sp,sp,tmp # un_alloca
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lzma_decode:
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#include "arch/mips/mipsel.r3000/lzma_d.S"
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section LZMA_DEC30
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@ -181,11 +180,11 @@ eof:
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pop t0; sw s0,(t0) // actual length used t0 dst
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pop t0; jr t0; nop
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/* These from /usr/include/sys/syscall.h */
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SYS_write = 4
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SYS_exit = 1
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SYS_mmap = 197
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SYS___syscall= 198
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/* These from /usr/include/asm/unistd.h */
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__NR_Linux = 4000
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__NR_write = 4+ __NR_Linux
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__NR_exit = 1+ __NR_Linux
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__NR_mmap = 90+ __NR_Linux
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msg_SELinux:
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addiu a2,zero,L71 - L70 // length
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@ -199,11 +198,11 @@ L71:
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section ELFMAINZ
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L72:
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li a0,2 // fd stderr
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li v0,SYS_write
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li v0,__NR_write
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syscall
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die:
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li a0,127
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li v0,SYS_exit
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li v0,__NR_exit
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syscall
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/* Decompress the rest of this loader, and jump to it.
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@ -226,26 +225,17 @@ unfold: // s7= &decompress; s6= &b_info(fold); s5= sz_pack2
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the brk() of the _un_compressed program. The address and length are pre-
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calculated by PackLinuxElf64amd::defineSymbols().
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*/
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#define a0_mmap a2
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#define a1_mmap a3
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#define a2_mmap 0x10
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#define a3_mmap 0x14
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#define a4_mmap 0x18
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#define a5_mmap 0x1c
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#define a4 0x10
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#define a5 0x14
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#define sp_frame 0x20
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lw a0_mmap,adrm - decompressor(s7)
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addiu sp,sp,-sp_frame
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lw a1_mmap,lenm - decompressor(s7)
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li t0, PROT_READ | PROT_WRITE | PROT_EXEC
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sw t0,a2_mmap(sp)
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li t0, MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS
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sw t0,a3_mmap(sp)
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li a1,0
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sw zero,a4_mmap(sp) //; sw zero,a5_mmap(sp) // MAP_ANON ==> ignore offset
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li a0,SYS_mmap
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li v0,SYS___syscall
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syscall // FIXME: check for error
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lw a0,adrm - decompressor(s7)
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li a2, PROT_READ | PROT_WRITE | PROT_EXEC
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lw a1,lenm - decompressor(s7)
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li a3, MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS
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sw zero,a4(sp) //; sw zero,a5_mmap(sp) // MAP_ANON ==> ignore offset
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li v0,__NR_mmap; syscall; bnez a3,err_syscall
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move a0,v0 // &new page(s)
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lw a1,adrc - decompressor(s7)
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@ -269,9 +259,13 @@ L80:
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lw t0,sz_unc(s6); move a3,sp; sw t0,0(sp) // &dst_len
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move a2,v0 // &dst
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lw a1,sz_cpr(s6) // src_len
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move a0,s6 // &b_info(fold)
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addiu a0,s6,sz_b_info
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jr s7 // decompress(src, srclen, dst, &dstlen /*, method*/)
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move ra,a2 // return to decompressed code
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err_syscall:
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b err_syscall
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nop
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main:
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lw s5,sz_pack2 - decompressor(s7) // length before stub
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bal unfold
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@ -2,17 +2,17 @@ tmp/mipsel.r3000-linux.elf-entry.bin: file format elf32-littlemips
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Sections:
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Idx Name Size VMA LMA File off Algn Flags
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0 ELFMAINX 00000028 00000000 00000000 00000034 2**0 CONTENTS, RELOC, READONLY
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1 NRV2E 00000218 00000000 00000000 0000005c 2**0 CONTENTS, RELOC, READONLY
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2 NRV2D 000001f0 00000000 00000000 00000274 2**0 CONTENTS, RELOC, READONLY
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3 NRV2B 000001b4 00000000 00000000 00000464 2**0 CONTENTS, RELOC, READONLY
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4 LZMA_ELF00 0000006c 00000000 00000000 00000618 2**0 CONTENTS, READONLY
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5 LZMA_DEC10 00000ad8 00000000 00000000 00000684 2**0 CONTENTS, READONLY
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6 LZMA_DEC20 00000ad8 00000000 00000000 0000115c 2**0 CONTENTS, READONLY
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7 LZMA_DEC30 00000004 00000000 00000000 00001c34 2**0 CONTENTS, READONLY
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8 NRV_TAIL 00000000 00000000 00000000 00001c38 2**0 CONTENTS, READONLY
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9 ELFMAINY 0000005e 00000000 00000000 00001c38 2**0 CONTENTS, RELOC, READONLY
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10 ELFMAINZ 000000c0 00000000 00000000 00001c96 2**0 CONTENTS, READONLY
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0 ELFMAINX 0000002c 00000000 00000000 00000034 2**0 CONTENTS, RELOC, READONLY
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1 NRV2E 00000218 00000000 00000000 00000060 2**0 CONTENTS, RELOC, READONLY
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2 NRV2D 000001f0 00000000 00000000 00000278 2**0 CONTENTS, RELOC, READONLY
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3 NRV2B 000001b4 00000000 00000000 00000468 2**0 CONTENTS, RELOC, READONLY
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4 LZMA_ELF00 00000070 00000000 00000000 0000061c 2**0 CONTENTS, READONLY
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5 LZMA_DEC10 00000ad8 00000000 00000000 0000068c 2**0 CONTENTS, READONLY
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6 LZMA_DEC20 00000ad8 00000000 00000000 00001164 2**0 CONTENTS, READONLY
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7 LZMA_DEC30 00000004 00000000 00000000 00001c3c 2**0 CONTENTS, READONLY
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8 NRV_TAIL 00000000 00000000 00000000 00001c40 2**0 CONTENTS, READONLY
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9 ELFMAINY 0000005e 00000000 00000000 00001c40 2**0 CONTENTS, RELOC, READONLY
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10 ELFMAINZ 000000bc 00000000 00000000 00001c9e 2**0 CONTENTS, READONLY
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SYMBOL TABLE:
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00000000 l d ELFMAINY 00000000 ELFMAINY
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00000000 l d ELFMAINZ 00000000 ELFMAINZ
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@ -45,7 +45,7 @@ OFFSET TYPE VALUE
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00000014 R_MIPS_32 LENU
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00000018 R_MIPS_32 ADRX
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0000001c R_MIPS_32 LENX
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00000020 R_MIPS_PC16 ELFMAINZ
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00000024 R_MIPS_PC16 ELFMAINZ
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RELOCATION RECORDS FOR [NRV2E]:
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OFFSET TYPE VALUE
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